text: Ignore synthetic motion events

We want to re-show the obscured mouse cursor when the
user interacts with the mouse, not when the pointer position
relative to the widget changed. So, ignore synthetic
motion events.

Fixes: #3792

.clang-format

@@ -0,0 +1,11 @@
+# See https://wiki.apertis.org/Guidelines/Coding_conventions#Code_formatting
+BasedOnStyle: GNU
+AlwaysBreakAfterDefinitionReturnType: All
+BreakBeforeBinaryOperators: None
+BinPackParameters: false
+SpaceAfterCStyleCast: true
+# Our column limit is actually 80, but setting that results in clang-format
+# making a lot of dubious hanging-indent choices; disable it and assume the
+# developer will line wrap appropriately. clang-format will still check
+# existing hanging indents.
+ColumnLimit: 0

.gitlab-ci.yml

@@ -1,7 +1,13 @@
+include:
+  - project: 'gnome/citemplates'
+    file: 'flatpak/flatpak_ci_initiative.yml'
+
 stages:
   - build
+  - analysis
+  - docs
   - flatpak
-#  - deploy
+  - deploy
 
 .cache-paths: &cache-paths
   paths:
@@ -12,113 +18,305 @@ stages:
     - subprojects/libepoxy/
     - subprojects/pango/
 
-fedora-x86_64: &fedora-x86_64-defaults
-  image: registry.gitlab.gnome.org/gnome/gtk/master:v8
-  stage: build
+# Common variables
+variables:
+  COMMON_MESON_FLAGS: "-Dwerror=true -Dglib:werror=false -Dpango:werror=false -Dgtk-doc:werror=false -Dwayland-protocols:werror=false -Dsysprof:werror=false"
+  BACKEND_FLAGS: "-Dx11-backend=true -Dwayland-backend=true -Dbroadway-backend=true"
+  FEATURE_FLAGS: "-Dvulkan=enabled -Dcloudproviders=enabled"
+  MESON_TEST_TIMEOUT_MULTIPLIER: 3
+  FEDORA_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora:v28"
+  FLATPAK_IMAGE: "registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master"
+  DOCS_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora-docs:v26"
+
+.only-default:
+  only:
+    - branches
+  except:
+    - tags
+
+style-check-diff:
+  extends: .only-default
+  image: $FEDORA_IMAGE
+  stage: .pre
+  allow_failure: true
   script:
-    - bash -x ./.gitlab-ci/test-docker.sh
+    - .gitlab-ci/run-style-check-diff.sh
+
+.build-fedora-default:
+  extends: .only-default
+  image: $FEDORA_IMAGE
   artifacts:
     when: always
     reports:
       junit:
-        - "${CI_PROJECT_DIR}/_build/report.xml" 
+        - "${CI_PROJECT_DIR}/_build/report-x11.xml"
+        - "${CI_PROJECT_DIR}/_build/report-wayland.xml"
+        - "${CI_PROJECT_DIR}/_build/report-broadway.xml"
     name: "gtk-${CI_COMMIT_REF_NAME}"
     paths:
       - "${CI_PROJECT_DIR}/_build/meson-logs"
-      - "${CI_PROJECT_DIR}/_build/report.xml"
-      - "${CI_PROJECT_DIR}/_build/report.html"
-      - "${CI_PROJECT_DIR}/_build/testsuite/reftests/output/*.png"
-      - "${CI_PROJECT_DIR}/_build/testsuite/gsk/compare/*/*.png"
+      - "${CI_PROJECT_DIR}/_build/report*.xml"
+      - "${CI_PROJECT_DIR}/_build/report*.html"
+      - "${CI_PROJECT_DIR}/_build/testsuite/reftests/output/*/*.png"
+      - "${CI_PROJECT_DIR}/_build/testsuite/gsk/compare/*/*/*.png"
+      - "${CI_PROJECT_DIR}/_build/testsuite/css/output/*/*.syscap"
   cache:
     key: "$CI_JOB_NAME"
-    <<: *cache-paths
+    paths:
+      - _ccache/
+      - subprojects/gdk-pixbuf/
+      - subprojects/glib/
+      - subprojects/graphene/
+      - subprojects/libepoxy/
+      - subprojects/pango/
 
-fedora-x86_64-staticlibs:
+fedora-x86_64:
+  extends: .build-fedora-default
+  stage: build
+  needs: []
   variables:
-    EXTRA_MESON_FLAGS: "-Ddefault_library=both"
-  <<: *fedora-x86_64-defaults
+    EXTRA_MESON_FLAGS: "--buildtype=debug --default-library=both"
+  script:
+    - meson subprojects update
+    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
+            _build
+    - ninja -C _build
+    - .gitlab-ci/run-tests.sh _build x11
+    - .gitlab-ci/run-tests.sh _build wayland
+    - .gitlab-ci/run-tests.sh _build broadway
 
-.mingw-defaults: &mingw-defaults
+release-build:
+  extends: .build-fedora-default
+  stage: build
+  needs: []
+  variables:
+    EXTRA_MESON_FLAGS: "--buildtype=release"
+  script:
+    - meson subprojects update
+    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
+            _build
+    - ninja -C _build
+    - .gitlab-ci/run-tests.sh _build x11
+
+installed-tests:
+  extends: .build-fedora-default
+  stage: build
+  needs: []
+  variables:
+    EXTRA_MESON_FLAGS: "--prefix=/usr --libdir=/usr/lib64 -Dinstall-tests=true"
+    G_TEST_ACCESSIBLE: 1
+  script:
+    - meson subprojects update
+    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
+            _build
+    - ninja -C _build
+    - sudo ninja -C _build install
+    - dbus-run-session xvfb-run -a -s "-screen 0 1024x768x24"
+            gnome-desktop-testing-runner
+                   --report-directory=_build/installed-tests-report/failed/
+                   --parallel=0
+                   gtk-4.0
+  artifacts:
+    paths:
+      - "_build/installed-tests-report/"
+
+
+.mingw-defaults:
+  extends: .only-default
   stage: build
   tags:
-    - win32
+    - win32-ps
   script:
     - C:\msys64\usr\bin\pacman --noconfirm -Syyuu
     - C:\msys64\usr\bin\bash -lc "bash -x ./.gitlab-ci/test-msys2.sh"
   cache:
-    key: "%CI_JOB_NAME%"
-    <<: *cache-paths
+    key: "$CI_JOB_NAME"
+    paths:
+      - _ccache/
+      - subprojects/gdk-pixbuf/
+      - subprojects/glib/
+      - subprojects/graphene/
+      - subprojects/libepoxy/
+      - subprojects/pango/
 
-msys2-mingw32:
+msys2-mingw64:
+  extends: .mingw-defaults
+  needs: []
   variables:
-    MSYSTEM: "MINGW32"
+    MSYSTEM: "MINGW64"
     CHERE_INVOKING: "yes"
-  <<: *mingw-defaults
 
-.flatpak-defaults: &flatpak-defaults
-  image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
+macos:
+  extends: .only-default
+  only:
+    - branches@GNOME/gtk
+  stage: build
+  tags:
+    - macos
+  needs: []
+  before_script:
+    - bash .gitlab-ci/show-execution-environment.sh
+    - pip3 install --user meson==0.56
+    - pip3 install --user ninja
+    - export PATH=/Users/gitlabrunner/Library/Python/3.7/bin:$PATH
+    - export MESON_FORCE_BACKTRACE=1
+  script:
+    - meson -Dx11-backend=false
+            -Dintrospection=disabled
+            -Dcpp_std=c++11
+            -Dpixman:tests=disabled
+            _build
+    - ninja -C _build
+  artifacts:
+    when: always
+    paths:
+      - "${CI_PROJECT_DIR}/_build/meson-logs"
+
+.flatpak-defaults:
+  image: $FLATPAK_IMAGE
   stage: flatpak
+  allow_failure: true
+  tags:
+    - flatpak
   artifacts:
     paths:
       - "${APPID}-dev.flatpak"
+      - 'repo.tar'
     expire_in: 1 day
   script:
     - bash -x ./.gitlab-ci/flatpak-build.sh "${APPID}"
 
 # Manual jobs, for branches and MRs
-.flatpak-manual: &flatpak-manual
-  <<: *flatpak-defaults
+.flatpak-manual:
+  extends: .flatpak-defaults
   when: manual
 
 # Only build Flatpak bundles automatically on master
-.flatpak-master: &flatpak-master
-  <<: *flatpak-defaults
+.flatpak-master:
+  extends: .flatpak-defaults
   only:
     - master
 
 flatpak-manual:demo:
+  extends: .flatpak-manual
+  needs: []
   variables:
     APPID: org.gtk.Demo4
-  <<: *flatpak-manual
 
 flatpak-master:demo:
+  extends: .flatpak-master
+  needs: []
   variables:
     APPID: org.gtk.Demo4
-  <<: *flatpak-master
 
 flatpak-manual:widget-factory:
+  extends: .flatpak-manual
+  needs: []
   variables:
     APPID: org.gtk.WidgetFactory4
-  <<: *flatpak-manual
 
 flatpak-master:widget-factory:
+  extends: .flatpak-master
+  needs: []
   variables:
     APPID: org.gtk.WidgetFactory4
-  <<: *flatpak-master
 
 flatpak-manual:icon-browser:
+  extends: .flatpak-manual
+  needs: []
   variables:
     APPID: org.gtk.IconBrowser4
-  <<: *flatpak-manual
 
 flatpak-master:icon-browser:
+  extends: .flatpak-master
+  needs: []
   variables:
     APPID: org.gtk.IconBrowser4
-  <<: *flatpak-master
 
-#pages:
-#  image: registry.gitlab.gnome.org/gnome/gtk/master:v6
-#  stage: deploy 
-#  script:
-#    - meson -Dgtk_doc=true _build .
-#    - ninja -C _build
-#    - ninja -C _build gdk4-doc gsk4-doc gtk4-doc
-#    - mkdir -p public/
-#    - mv _build/docs/reference/gtk/html/ public/gtk/
-#    - mv _build/docs/reference/gdk/html/ public/gdk/
-#    - mv _build/docs/reference/gsk/html/ public/gsk/
-#  artifacts:
-#    paths:
-#      - public
-#  only:
-#    - master
+# Publish the demo apps to the GNOME Nightly repo
+# https://wiki.gnome.org/Apps/Nightly
+# https://gitlab.gnome.org/GNOME/Initiatives/-/wikis/DevOps-with-Flatpak
+nightly demo:
+    extends: '.publish_nightly'
+    dependencies: ['flatpak-master:demo']
+    needs: ['flatpak-master:demo']
+
+nightly factory:
+    extends: '.publish_nightly'
+    dependencies: ['flatpak-master:widget-factory']
+    needs: ['flatpak-master:widget-factory']
+
+nightly icon-browser:
+    extends: '.publish_nightly'
+    dependencies: ['flatpak-master:icon-browser']
+    needs: ['flatpak-master:icon-browser']
+
+static-scan:
+  image: $FEDORA_IMAGE
+  stage: analysis
+  needs: []
+  variables:
+    EXTRA_MESON_FLAGS: "--buildtype=debug"
+  script:
+    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} _scan_build
+    - ninja -C _scan_build scan-build
+  artifacts:
+    paths:
+      - _scan_build/meson-logs
+  allow_failure: true
+
+# Run tests with the address sanitizer. We need to turn off introspection,
+# since it is incompatible with asan
+asan-build:
+  image: $FEDORA_IMAGE
+  tags: [ asan ]
+  stage: analysis
+  needs: []
+  variables:
+  script:
+    - CC=clang meson --buildtype=debugoptimized -Db_sanitize=address -Db_lundef=false -Dintrospection=disabled _build
+    - ninja -C _build
+    - .gitlab-ci/run-tests.sh _build wayland
+  artifacts:
+    paths:
+      - _build/meson-logs
+  allow_failure: true
+
+reference:
+  image: $DOCS_IMAGE
+  stage: docs
+  needs: []
+  variables:
+    EXTRA_MESON_FLAGS: "--buildtype=release --force-fallback-for=gdk-pixbuf,pango"
+  script:
+    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} -Dgtk_doc=true -Dgdk-pixbuf:gtk_doc=true -Dpango:gtk_doc=true _build
+    - meson compile -C _build
+    - mkdir -p _reference/
+    - mv _build/docs/reference/gdk/gdk4/ _reference/gdk4/
+    - mv _build/docs/reference/gdk/gdk4-x11/ _reference/gdk4-x11/
+    - mv _build/docs/reference/gdk/gdk4-wayland/ _reference/gdk4-wayland/
+    - mv _build/docs/reference/gsk/gsk4/ _reference/gsk4/
+    - mv _build/docs/reference/gtk/gtk4/ _reference/gtk4/
+    - mv _build/subprojects/pango/docs/Pango/ _reference/Pango/
+    - mv _build/subprojects/pango/docs/PangoCairo/ _reference/PangoCairo/
+    - mv _build/subprojects/pango/docs/PangoFc/ _reference/PangoFc/
+    - mv _build/subprojects/pango/docs/PangoFT2/ _reference/PangoFT2/
+    - mv _build/subprojects/pango/docs/PangoOT/ _reference/PangoOT/
+    - mv _build/subprojects/pango/docs/PangoXft/ _reference/PangoXft/
+    - mv _build/subprojects/gdk-pixbuf/docs/gdk-pixbuf/ _reference/gdk-pixbuf/
+    - mv _build/subprojects/gdk-pixbuf/docs/gdk-pixdata/ _reference/gdk-pixdata/
+  artifacts:
+    paths:
+      - _reference
+
+pages:
+  stage: deploy
+  needs: ['reference']
+  script:
+    - mv _reference/ public/
+    - cp .gitlab-ci/pages/* public/
+  artifacts:
+    paths:
+      - public
+  only:
+    - master

.gitlab-ci/README.md

@@ -0,0 +1,47 @@
+## GTK CI infrastructure
+
+GTK uses different CI images depending on platform and jobs.
+
+The CI images are Docker containers, generated either using `docker` or
+`podman`, and pushed to the GitLab [container registry][registry].
+
+Each Docker image has a tag composed of two parts:
+
+ - `${image}`: the base image for a given platform, like "fedora" or
+   "debian-stable"
+ - `${number}`: an incremental version number, or `latest`
+
+See the [container registry][registry] for the available images for each
+branch, as well as their available versions.
+
+### Checklist for Updating a CI image
+
+ - [ ] Update the `${image}.Dockerfile` file with the dependencies
+ - [ ] Run `./run-docker.sh build --base ${image} --version ${number}`
+ - [ ] Run `./run-docker.sh push --base ${image} --version ${number}`
+   once the Docker image is built; you may need to log in by using
+   `docker login` or `podman login`
+ - [ ] Update the `image` keys in the `.gitlab-ci.yml` file with the new
+   image tag
+ - [ ] Open a merge request with your changes and let it run
+
+### Checklist for Adding a new CI image
+
+ - [ ] Write a new `${image}.Dockerfile` with the instructions to set up
+   a build environment
+ - [ ] Add the `pip3 install meson` incantation
+ - [ ] Run `./run-docker.sh build --base ${image} --version ${number}`
+ - [ ] Run `./run-docker.sh push --base ${image} --version ${number}`
+ - [ ] Add the new job to `.gitlab-ci.yml` referencing the image
+ - [ ] Open a merge request with your changes and let it run
+
+### Checklist for Adding a new dependency to a CI image
+
+Our images are layered, and the base (called fedora-base) contains
+all the rpm payload. Therefore, adding a new dependency is a 2-step
+process:
+
+ 1. [ ] Build and upload fedora-base:$version+1
+ 1. [ ] Build and upload fedora:$version+1 based on fedora-base:version+1
+
+[registry]: https://gitlab.gnome.org/GNOME/gtk/container_registry

.gitlab-ci/clang-format-diff.py

@@ -0,0 +1,133 @@
+#!/usr/bin/env python3
+#
+# === clang-format-diff.py - ClangFormat Diff Reformatter ---*- python -*-=== #
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ===---------------------------------------------------------------------=== #
+
+"""
+This script reads input from a unified diff and reformats all the changed
+lines. This is useful to reformat all the lines touched by a specific patch.
+Example usage for git/svn users:
+
+  git diff -U0 --no-color HEAD^ | clang-format-diff.py -p1 -i
+  svn diff --diff-cmd=diff -x-U0 | clang-format-diff.py -i
+
+"""
+from __future__ import absolute_import, division, print_function
+
+import argparse
+import difflib
+import re
+import subprocess
+import sys
+
+if sys.version_info.major >= 3:
+    from io import StringIO
+else:
+    from io import BytesIO as StringIO
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument('-i', action='store_true', default=False,
+                        help='apply edits to files instead of displaying a '
+                             'diff')
+    parser.add_argument('-p', metavar='NUM', default=0,
+                        help='strip the smallest prefix containing P slashes')
+    parser.add_argument('-regex', metavar='PATTERN', default=None,
+                        help='custom pattern selecting file paths to reformat '
+                        '(case sensitive, overrides -iregex)')
+    parser.add_argument('-iregex', metavar='PATTERN',
+                        default=r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hh|hpp|m|mm|inc'
+                                r'|js|ts|proto|protodevel|java|cs)',
+                        help='custom pattern selecting file paths to reformat '
+                             '(case insensitive, overridden by -regex)')
+    parser.add_argument('-sort-includes', action='store_true', default=False,
+                        help='let clang-format sort include blocks')
+    parser.add_argument('-v', '--verbose', action='store_true',
+                        help='be more verbose, ineffective without -i')
+    parser.add_argument('-style',
+                        help='formatting style to apply (LLVM, Google, '
+                        'Chromium, Mozilla, WebKit)')
+    parser.add_argument('-binary', default='clang-format',
+                        help='location of binary to use for clang-format')
+    args = parser.parse_args()
+
+    # Extract changed lines for each file.
+    filename = None
+    lines_by_file = {}
+    for line in sys.stdin:
+        match = re.search(r'^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
+        if match:
+            filename = match.group(2)
+        if filename is None:
+            continue
+
+        if args.regex is not None:
+            if not re.match('^%s$' % args.regex, filename):
+                continue
+        else:
+            if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
+                continue
+
+        match = re.search(r'^@@.*\+(\d+)(,(\d+))?', line)
+        if match:
+            start_line = int(match.group(1))
+            line_count = 1
+            if match.group(3):
+                line_count = int(match.group(3))
+            if line_count == 0:
+                continue
+            end_line = start_line + line_count - 1
+            lines_by_file.setdefault(filename, []).extend(
+                ['-lines', str(start_line) + ':' + str(end_line)])
+
+    # Reformat files containing changes in place.
+    # We need to count amount of bytes generated in the output of
+    # clang-format-diff. If clang-format-diff doesn't generate any bytes it
+    # means there is nothing to format.
+    format_line_counter = 0
+    for filename, lines in lines_by_file.items():
+        if args.i and args.verbose:
+            print('Formatting {}'.format(filename))
+        command = [args.binary, filename]
+        if args.i:
+            command.append('-i')
+        if args.sort_includes:
+            command.append('-sort-includes')
+        command.extend(lines)
+        if args.style:
+            command.extend(['-style', args.style])
+        p = subprocess.Popen(command,
+                             stdout=subprocess.PIPE,
+                             stderr=None,
+                             stdin=subprocess.PIPE,
+                             universal_newlines=True)
+        stdout, _ = p.communicate()
+        if p.returncode != 0:
+            sys.exit(p.returncode)
+
+        if not args.i:
+            with open(filename) as f:
+                code = f.readlines()
+            formatted_code = StringIO(stdout).readlines()
+            diff = difflib.unified_diff(code, formatted_code,
+                                        filename, filename,
+                                        '(before formatting)',
+                                        '(after formatting)')
+            diff_string = ''.join(diff)
+            if diff_string:
+                format_line_counter += sys.stdout.write(diff_string)
+
+    if format_line_counter > 0:
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()

.gitlab-ci/fedora-base.Dockerfile

@@ -1,4 +1,4 @@
-FROM fedora:31
+FROM fedora:33
 
 RUN dnf -y install \
     adwaita-icon-theme \
@@ -8,9 +8,12 @@ RUN dnf -y install \
     cairo-devel \
     cairo-gobject-devel \
     ccache \
+    clang \
+    clang-analyzer \
     colord-devel \
     cups-devel \
     dbus-daemon \
+    dbus-x11 \
     dejavu-sans-mono-fonts \
     desktop-file-utils \
     diffutils \
@@ -23,8 +26,10 @@ RUN dnf -y install \
     gettext \
     git \
     glib2-devel \
+    glib2-static \
     glibc-devel \
     glibc-headers \
+    gnome-desktop-testing \
     gobject-introspection-devel \
     graphene-devel \
     gstreamer1-devel \
@@ -37,12 +42,15 @@ RUN dnf -y install \
     itstool \
     json-glib-devel \
     lcov \
+    libasan \
     libattr-devel \
+    libcloudproviders-devel \
     libepoxy-devel \
     libffi-devel \
     libmount-devel \
     librsvg2 \
     libselinux-devel \
+    libubsan \
     libXcomposite-devel \
     libXcursor-devel \
     libXcursor-devel \
@@ -57,13 +65,16 @@ RUN dnf -y install \
     libxslt \
     mesa-dri-drivers \
     mesa-libEGL-devel \
-    mesa-libwayland-egl-devel \
+    mesa-libGLES-devel \
+    meson \
     ninja-build \
     pango-devel \
     pcre-devel \
+    pcre-static \
     python3 \
     python3-jinja2 \
     python3-pip \
+    python3-pygments \
     python3-wheel \
     redhat-rpm-config \
     sassc \
@@ -71,17 +82,8 @@ RUN dnf -y install \
     vulkan-devel \
     wayland-devel \
     wayland-protocols-devel \
+    weston \
+    weston-libs \
     which \
     xorg-x11-server-Xvfb \
  && dnf clean all
-
-RUN pip3 install meson==0.50.1
-
-ARG HOST_USER_ID=5555
-ENV HOST_USER_ID ${HOST_USER_ID}
-RUN useradd -u $HOST_USER_ID -ms /bin/bash user
-
-USER user
-WORKDIR /home/user
-
-ENV LANG C.UTF-8

.gitlab-ci/fedora-docs.Dockerfile

@@ -0,0 +1,17 @@
+FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v28
+
+RUN dnf -y install \
+        python3-jinja2 \
+        python3-markdown \
+        python3-pygments \
+        python3-toml \
+        python3-typogrify
+
+ARG HOST_USER_ID=5555
+ENV HOST_USER_ID ${HOST_USER_ID}
+RUN useradd -u $HOST_USER_ID -ms /bin/bash user
+
+USER user
+WORKDIR /home/user
+
+ENV LANG C.UTF-8

.gitlab-ci/fedora.Dockerfile

@@ -0,0 +1,13 @@
+FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v28
+
+# Enable sudo for wheel users
+RUN sed -i -e 's/# %wheel/%wheel/' -e '0,/%wheel/{s/%wheel/# %wheel/}' /etc/sudoers
+
+ARG HOST_USER_ID=5555
+ENV HOST_USER_ID ${HOST_USER_ID}
+RUN useradd -u $HOST_USER_ID -G wheel -ms /bin/bash user
+
+USER user
+WORKDIR /home/user
+
+ENV LANG C.UTF-8

.gitlab-ci/flatpak-build.sh

@@ -4,34 +4,32 @@ set -e
 
 appid=$1
 
-builddir=app
+builddir=flatpak_app
 repodir=repo
 
 flatpak-builder \
+        --user --disable-rofiles-fuse \
         --stop-at=gtk \
         ${builddir} \
         build-aux/flatpak/${appid}.json
 
-flatpak-builder \
-        --run ${builddir} build-aux/flatpak/${appid}.json \
-        meson \
-                --prefix /app \
-                --libdir /app/lib \
-                --buildtype debug \
+flatpak build ${builddir} meson \
+                --prefix=/app \
+                --libdir=/app/lib \
+                --buildtype=release \
                 -Dx11-backend=true \
                 -Dwayland-backend=true \
                 -Dprint-backends=file \
                 -Dbuild-tests=false \
                 -Dbuild-examples=false \
-                -Dintrospection=false \
+                -Dintrospection=disabled \
                 -Ddemos=true \
-                _build .
-
-flatpak-builder \
-        --run ${builddir} build-aux/flatpak/${appid}.json \
-        ninja -C _build install
+                _flatpak_build
+
+flatpak build ${builddir} ninja -C _flatpak_build install
 
 flatpak-builder \
+        --user --disable-rofiles-fuse \
         --finish-only \
         --repo=${repodir} \
         ${builddir} \
@@ -40,5 +38,10 @@ flatpak-builder \
 flatpak build-bundle \
         ${repodir} \
         ${appid}-dev.flatpak \
-        --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo \
+        --runtime-repo=https://nightly.gnome.org/gnome-nightly.flatpakrepo \
         ${appid}
+
+# to be consumed by the nightly publish jobs
+if [[ $CI_COMMIT_BRANCH == master ]]; then
+        tar cf repo.tar ${repodir}
+fi

.gitlab-ci/meson-html-report.py

@@ -138,22 +138,26 @@ ul.images li {
 </head>
 <body>
   <header>
-    <h1>{{ report.project_name }} :: Test Reports</h1>
-    <div class="report-meta">
-      <p><strong>Branch:</strong> {{ report.branch_name }}</p>
-      <p><strong>Date:</strong> <time datetime="{{ report.date.isoformat() }}">{{ report.locale_date }}</time></p>
-      {% if report.job_id %}<p><strong>Job ID:</strong> {{ report.job_id }}</p>{% endif %}
-    </div>
+    <h1>{{ report.project_name }}/{{ report.backend }}/{{ report.branch_name }} :: Test Reports</h1>
   </header>
 
   <article>
+    <section>
+      <div class="report-meta">
+        <p><strong>Backend:</strong> {{ report.backend }}</p>
+        <p><strong>Branch:</strong> {{ report.branch_name }}</p>
+        <p><strong>Date:</strong> <time datetime="{{ report.date.isoformat() }}">{{ report.locale_date }}</time></p>
+        {% if report.job_id %}<p><strong>Job ID:</strong> {{ report.job_id }}</p>{% endif %}
+      </div>
+    </section>
+
     <section>
       <div class="summary">
         <h3><a name="summary">Summary</a></h3>
         <ul>
           <li><strong>Total units:</strong> {{ report.total_units }}</li>
-          <li><strong>Passed:</strong> <a href="#passed">{{ report.total_successes }}</a></li>
-          <li><strong>Failed:</strong> <a href="#failures">{{ report.total_failures }}</a></li>
+          <li><strong>Failed:</strong> {{ report.total_failures }}</li>
+          <li><strong>Passed:</strong> {{ report.total_successes }}</li>
         </ul>
       </div>
     </section>
@@ -164,30 +168,47 @@ ul.images li {
         <h3><a name="results">Suite: {{ suite_result.suite_name }}</a></h3>
         <ul>
           <li><strong>Units:</strong> {{ suite_result.n_units }}</li>
-          <li><strong>Passed:</strong> {{ suite_result.n_successes }}</li>
-          <li><strong>Failed:</strong> {{ suite_result.n_failures }}</li>
+          <li><strong>Failed:</strong> <a href="#{{ suite_result.suite_name }}-failed">{{ suite_result.n_failures }}</a></li>
+          <li><strong>Passed:</strong> <a href="#{{ suite_result.suite_name }}-passed">{{ suite_result.n_successes }}</a></li>
         </ul>
 
+        <div class="failures">
+          <h4><a name="{{ suite_result.suite_name }}-failed">Failures</a></h4>
+          <ul class="failed">
+            {% for failure in suite_result.failures if failure.result in [ 'ERROR', 'FAIL', 'UNEXPECTEDPASS' ] %}
+            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
+              {% if failure.stdout %}
+              Output: <pre>{{ failure.stdout }}</pre>
+              {% endif %}
+              {% if failure.image_data is defined %}
+              <ul class="images">
+                <li><img alt="ref" src="{{ failure.image_data.ref }}" /></li>
+                <li><img alt="out" src="{{ failure.image_data.out }}" /></li>
+                <li><img alt="diff" src="{{ failure.image_data.diff }}" /></li>
+              </ul>
+              {% endif %}
+            </li>
+            {% else %}
+            <li>None</li>
+            {% endfor %}
+          </ul>
+
+          <h4><a name="{{ suite_result.suite_name }}-timed-out">Timed out</a></h4>
+          <ul class="failed">
+            {% for failure in suite_result.failures if failure.result == 'TIMEOUT' %}
+            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
+              {% if failure.stdout %}
+              Output: <pre>{{ failure.stdout }}</pre>
+              {% endif %}
+            </li>
+            {% else %}
+            <li>None</li>
+            {% endfor %}
+          </ul>
+        </div>
+
         <div class="successes">
-          <h4><a name="passed">Passed</a></h4>
-          <ul class="passed">
-            {% for success in suite_result.successes if success.result == 'OK' %}
-            <li>{{ success.name }} - result: <span class="result pass">{{ success.result }}</li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-
-          <h4><a name="skipped">Skipped</a></h4>
-          <ul>
-            {% for success in suite_result.successes if success.result == 'SKIP' %}
-            <li>{{ success.name }} - result: <span class="result skip">{{ success.result }}</li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-
-          <h4><a name="expected-fail">Expected failures</a></h4>
+          <h4><a name="{{ suite_result.suite_name }}-expected-fail">Expected failures</a></h4>
           <ul>
           {% for success in suite_result.successes if success.result == 'EXPECTEDFAIL' %}
             <li><a name="{{ success.name }}">{{ success.name }}</a> - result: <span class="result xfail">{{ success.result }}</span><br/>
@@ -206,37 +227,20 @@ ul.images li {
             <li>None</li>
           {% endfor %}
           </ul>
-        </div>
 
-        <div class="failures">
-          <h4><a name="failed">Failed</a></h4>
-          <ul class="failed">
-            {% for failure in suite_result.failures if failure.result == 'FAIL' %}
-            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
-              {% if failure.stdout %}
-              Output: <pre>{{ failure.stdout }}</pre>
-              {% endif %}
-              {% if failure.image_data is defined %}
-              <ul class="images">
-                <li><img alt="ref" src="{{ failure.image_data.ref }}" /></li>
-                <li><img alt="out" src="{{ failure.image_data.out }}" /></li>
-                <li><img alt="diff" src="{{ failure.image_data.diff }}" /></li>
-              </ul>
-              {% endif %}
-            </li>
+          <h4><a name="{{ suite_result.suite_name }}-skipped">Skipped</a></h4>
+          <ul>
+            {% for success in suite_result.successes if success.result == 'SKIP' %}
+            <li>{{ success.name }} - result: <span class="result skip">{{ success.result }}</li>
             {% else %}
             <li>None</li>
             {% endfor %}
           </ul>
 
-          <h4><a name="timed-out">Timed out</a></h4>
-          <ul class="failed">
-            {% for failure in suite_result.failures if failure.result == 'TIMEOUT' %}
-            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
-              {% if failure.stdout %}
-              Output: <pre>{{ failure.stdout }}</pre>
-              {% endif %}
-            </li>
+          <h4><a name="{{ suite_result.suite_name }}-passed">Passed</a></h4>
+          <ul class="passed">
+            {% for success in suite_result.successes if success.result == 'OK' %}
+            <li>{{ success.name }} - result: <span class="result pass">{{ success.result }}</li>
             {% else %}
             <li>None</li>
             {% endfor %}
@@ -256,6 +260,9 @@ aparser = argparse.ArgumentParser(description='Turns a Meson test log into an HT
 aparser.add_argument('--project-name', metavar='NAME',
                      help='The project name',
                      default='Unknown')
+aparser.add_argument('--backend', metavar='NAME',
+                     help='The used backend',
+                     default='unknown')
 aparser.add_argument('--job-id', metavar='ID',
                      help='The job ID for the report',
                      default=None)
@@ -316,6 +323,7 @@ report = {}
 report['date'] = datetime.datetime.utcnow()
 report['locale_date'] = report['date'].strftime("%c")
 report['project_name'] = args.project_name
+report['backend'] = args.backend
 report['job_id'] = args.job_id
 report['branch_name'] = args.branch
 report['total_successes'] = 0
@@ -328,7 +336,7 @@ for name, units in suites.items():
     print('Processing {} suite {}:'.format(project_name, suite_name))
 
     def if_failed(unit):
-        if unit['result'] in ['FAIL', 'TIMEOUT']:
+        if unit['result'] in ['FAIL', 'UNEXPECTEDPASS', 'TIMEOUT', 'ERROR',]:
             return True
         return False
 

.gitlab-ci/meson-junit-report.py

@@ -19,6 +19,9 @@ aparser = argparse.ArgumentParser(description='Turns a Meson test log into a JUn
 aparser.add_argument('--project-name', metavar='NAME',
                      help='The project name',
                      default='unknown')
+aparser.add_argument('--backend', metavar='NAME',
+                     help='The used backend',
+                     default='unknown')
 aparser.add_argument('--job-id', metavar='ID',
                      help='The job ID for the report',
                      default='Unknown')
@@ -51,6 +54,7 @@ for line in args.infile:
 
     duration = data['duration']
     return_code = data['returncode']
+    result = data['result']
     log = data['stdout']
 
     unit = {
@@ -58,6 +62,7 @@ for line in args.infile:
         'name': unit_name,
         'duration': duration,
         'returncode': return_code,
+        'result': result,
         'stdout': log,
     }
 
@@ -68,12 +73,12 @@ for name, units in suites.items():
     print('Processing suite {} (units: {})'.format(name, len(units)))
 
     def if_failed(unit):
-        if unit['returncode'] != 0:
+        if unit['result'] in ['ERROR', 'FAIL', 'UNEXPECTEDPASS', 'TIMEOUT']:
             return True
         return False
 
     def if_succeded(unit):
-        if unit['returncode'] == 0:
+        if unit['result'] in ['OK', 'EXPECTEDFAIL', 'SKIP']:
             return True
         return False
 
@@ -90,18 +95,18 @@ for name, units in suites.items():
     for unit in successes:
         testcase = ET.SubElement(testsuite, 'testcase')
         testcase.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        testcase.set('name', unit['name'])
+        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
         testcase.set('time', str(unit['duration']))
 
     for unit in failures:
         testcase = ET.SubElement(testsuite, 'testcase')
         testcase.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        testcase.set('name', unit['name'])
+        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
         testcase.set('time', str(unit['duration']))
 
         failure = ET.SubElement(testcase, 'failure')
         failure.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        failure.set('name', unit['name'])
+        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
         failure.set('type', 'error')
         failure.text = unit['stdout']
 

.gitlab-ci/pages/fonts.css

@@ -0,0 +1,154 @@
+/*
+ * SPDX-FileCopyrightText: 2021 GNOME Foundation
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+/**
+ * RedHat Fonts taken from https://github.com/RedHatOfficial/RedHatFont
+ * License: SIL Open Font License 1.1 http://scripts.sil.org/OFL
+ */
+@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,700;1,400;1,700&family=Red+Hat+Display:ital,wght@0,400;0,500;0,700;0,900;1,400;1,500;1,700;1,900&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,700;1,400;1,700&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Source+Code+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500;1,600&display=swap');
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-Regular.woff2") format("woff2"),
+       url("RedHatDisplay-Regular.woff") format("woff");
+  font-style: normal;
+  font-weight: 400;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-RegularItalic.woff2") format("woff2"),
+       url("RedHatDisplay-RegularItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 400;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-Medium.woff2") format("woff2"),
+       url("RedHatDisplay-Medium.woff") format("woff");
+  font-style: normal;
+  font-weight: 500;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-MediumItalic.woff2") format("woff2"),
+       url("RedHatDisplay-MediumItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 500;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-Bold.woff2") format("woff2"),
+       url("RedHatDisplay-Bold.woff") format("woff");
+  font-style: normal;
+  font-weight: 700;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-BoldItalic.woff2") format("woff2"),
+       url("RedHatDisplay-BoldItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 700;
+  font-display: fallback;
+}
+
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-Black.woff2") format("woff2"),
+       url("RedHatDisplay-Black.woff") format("woff");
+  font-style: normal;
+  font-weight: 900;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatDisplayWeb";
+  src: local('RedHatDisplayWeb'),
+       url("RedHatDisplay-BlackItalic.woff2") format("woff2"),
+       url("RedHatDisplay-BlackItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 900;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-Regular.woff2") format("woff2"),
+       url("RedHatText-Regular.woff") format("woff");
+  font-style: normal;
+  font-weight: 400;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-RegularItalic.woff2") format("woff2"),
+       url("RedHatText-RegularItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 400;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-Medium.woff2") format("woff2"),
+       url("RedHatText-Medium.woff") format("woff");
+  font-style: normal;
+  font-weight: 700;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-MediumItalic.woff2") format("woff2"),
+       url("RedHatText-MediumItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 700;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-Bold.woff2") format("woff2"),
+       url("RedHatText-Bold.woff") format("woff");
+  font-style: normal;
+  font-weight: 900;
+  font-display: fallback;
+}
+
+@font-face {
+  font-family: "RedHatTextWeb";
+  src: local('RedHatTextWeb'),
+       url("RedHatText-BoldItalic.woff2") format("woff2"),
+       url("RedHatText-BoldItalic.woff") format("woff");
+  font-style: italic;
+  font-weight: 900;
+  font-display: fallback;
+}

.gitlab-ci/pages/gtk-logo.svg

@@ -0,0 +1,138 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="128"
+   height="128"
+   id="svg6843"
+   sodipodi:version="0.32"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   version="1.0"
+   sodipodi:docname="gtk-logo.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape"
+   inkscape:export-filename="/home/ebassi/Pictures/gtk-logo-256.png"
+   inkscape:export-xdpi="192"
+   inkscape:export-ydpi="192">
+  <defs
+     id="defs6845">
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="-50 : 600 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="700 : 600 : 1"
+       inkscape:persp3d-origin="300 : 400 : 1"
+       id="perspective13" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="2.8284271"
+     inkscape:cx="69.874353"
+     inkscape:cy="64.313526"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:document-units="px"
+     inkscape:grid-bbox="true"
+     width="128px"
+     height="128px"
+     showguides="true"
+     inkscape:guide-bbox="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid7947" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata6848">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+        <dc:date />
+        <dc:creator>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:creator>
+        <dc:rights>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:rights>
+        <dc:publisher>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:publisher>
+        <dc:identifier />
+        <dc:source />
+        <dc:relation />
+        <dc:language />
+        <dc:subject>
+          <rdf:Bag />
+        </dc:subject>
+        <dc:coverage />
+        <dc:description />
+        <dc:contributor>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:contributor>
+        <cc:license
+           rdf:resource="" />
+      </cc:Work>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     id="layer1"
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer">
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path6976"
+       d="M 20.88413,30.82696 L 53.816977,55.527708 L 107.33282,39.060543 L 70.587303,17.177763 L 20.88413,30.82696 z"
+       style="fill:#729fcf;fill-opacity:1;fill-rule:evenodd;stroke:#ffffff;stroke-width:2.12364459;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;display:inline" />
+    <path
+       id="path6978"
+       d="M 22.94243,82.287118 L 20.88413,30.82696 L 53.816977,55.527708 L 53.816977,111.10486 L 22.94243,82.287118 z"
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+       id="path6980"
+       d="M 53.816977,111.10486 L 103.21619,90.5207 L 107.33282,39.060543 L 53.816977,55.527708 L 53.816977,111.10486 z"
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+    <path
+       sodipodi:nodetypes="ccc"
+       id="path6982"
+       d="M 23.216626,81.319479 L 70.48573,67.361442 L 103.38422,90.444516"
+       style="opacity:1;fill:none;fill-rule:evenodd;stroke:#ffffff;stroke-width:1.25;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="cc"
+       id="path6984"
+       d="M 70.434539,17.875593 L 70.434539,66.984877"
+       style="opacity:1;fill:#babdb6;fill-rule:evenodd;stroke:#ffffff;stroke-width:1.25;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+  </g>
+</svg>

.gitlab-ci/pages/index.html

@@ -0,0 +1,149 @@
+<!--
+SPDX-FileCopyrightText: 2021 GNOME Foundation
+
+SPDX-License-Identifier: LGPL-2.1-or-later
+-->
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <title>GTK Documentation</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+
+  <meta charset="utf-8" />
+
+  <meta property="og:site_name" content="https://docs.gtk.org"/>
+  <meta property="og:title" content="GTK Documentation"/>
+  <meta property="og:url" content="https://docs.gtk.org"/>
+  <meta property="og:type" content="website"/>
+  <meta property="og:description" content="API reference for GTK"/>
+
+  <meta name="twitter:title" content="GTK Documentation"/>
+  <meta name="twitter:url" content="https://docs.gtk.org"/>
+  <meta name="twitter:card" content="summary"/>
+
+  <link rel="canonical" href="https://docs.gtk.org"/>
+
+  <link rel="stylesheet" href="style.css" type="text/css" />
+
+  <script src="main.js"></script>
+
+  <!--[if IE]><script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
+</head>
+
+<body>
+  <div id="body-wrapper" tabindex="-1">
+
+    <nav class="sidebar">
+      
+      <div class="section">
+        <img src="gtk-logo.svg" class="logo"/>
+      </div>
+
+      <div class="section">
+        <h5>Sections</h5>
+        <div class="links">
+          <a href="#user-interface">User interface</a>
+          <a href="#core-libraries">Core libraries</a>
+        </div>
+      </div>
+
+    </nav>
+    
+    <button id="btn-to-top" class="hidden"><span class="up-arrow"></span></button>
+
+    <section id="main" class="content">
+      <header>
+        <h1>GTK Documentation</h1>
+      </header>
+
+      <div class="toggle-wrapper">
+        <h4 id="user-interface">
+          User interface
+          <a href="#user-interface" class="anchor"></a>
+        </h4>
+
+        <div class="docblock">
+          <h5 id="gdk">GTK</h5>
+          <p>GTK is the primary library used to construct user interfaces. It
+          provides user interface controls and signal callbacks to respond to
+          user actions.</p>
+          <p><a href="https://docs.gtk.org/gtk4/">GTK API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="gdk">GSK</h5>
+          <p>An intermediate layer which provides a rendering API implemented using Cairo, OpenGL or Vulkan.</p>
+          <p><a href="https://docs.gtk.org/gsk4/">GSK API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="gdk">GDK</h5>
+          <p>An intermediate layer which isolates GTK from the details of the windowing system.</p>
+          <p><a href="https://docs.gtk.org/gdk4/">GDK API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="pango">Pango</h5>
+          <p>Pango is the core text and font handling library used in GTK
+          applications. It has extensive support for the different writing
+          systems used throughout the world.</p>
+          <p><a href="https://docs.gtk.org/Pango/">Pango API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="gdk-pixbuf">GdkPixbuf</h5>
+          <p>GdkPixbuf is a library for image loading and manipulation.</p>
+          <p><a href="https://docs.gtk.org/gdk-pixbuf/">GdkPixbuf API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="cairo">Cairo</h5>
+          <p>Cairo is a 2D graphics library with support for multiple output
+          devices. It is designed to produce consistent, high quality output
+          on all media.</p>
+          <p><a href="https://www.cairographics.org/manual/" class="external">Cairo API reference</a></p>
+        </div>
+      </div>
+
+      <div class="toggle-wrapper">
+        <h4 id="core-libraries" style="display:flex;">
+          Core libraries
+          <a href="#core-libraries" class="anchor"></a>
+        </h4>
+
+        <div class="docblock">
+          <h5 id="glib">GLib</h5>
+          <p>GLib provides the core application building blocks for libraries
+          and applications written in C. It provides common data types
+          used in GTK, the main loop implementation, and a large set of
+          utility functions for strings and general portability across
+          different platforms.</p>
+          <p><a href="https://developer.gnome.org/glib/" class="external">GLib API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="gobject">GObject</h5>
+          <p>GObject provides the object system used by GTK.</p>
+          <p><a href="https://developer.gnome.org/gobject/" class="external">GObject API reference</a></p>
+        </div>
+
+        <div class="docblock">
+          <h5 id="gio">GIO</h5>
+          <p>GIO provides a portable, modern and easy-to-use file system
+          abstraction API for accessing local and remote files; a set of
+          low and high level abstractions over the <a href="https://www.freedesktop.org/wiki/Software/dbus/" class="external">DBus</a>
+          IPC specification; an application settings API; portable networking
+          abstractions; and additional utilities for writing asynchronous
+          operations without blocking the user interface of your application.</p>
+          <p><a href="https://developer.gnome.org/gio/" class="external">GIO API reference</a></p>
+        </div>
+      </div>
+
+    </section>
+
+    <footer>
+    </footer>
+  </div>
+</body>
+</html>

.gitlab-ci/pages/main.js

@@ -0,0 +1,140 @@
+// SPDX-FileCopyrightText: 2021 GNOME Foundation
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+// eslint-disable-next-line no-unused-vars
+function hasClass(elem, className) {
+    return elem && elem.classList && elem.classList.contains(className);
+}
+
+// eslint-disable-next-line no-unused-vars
+function addClass(elem, className) {
+    if (!elem || !elem.classList) {
+        return;
+    }
+    elem.classList.add(className);
+}
+
+// eslint-disable-next-line no-unused-vars
+function removeClass(elem, className) {
+    if (!elem || !elem.classList) {
+        return;
+    }
+    elem.classList.remove(className);
+}
+
+function insertAfter(newNode, referenceNode) {
+    referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
+}
+
+function onEach(arr, func, reversed) {
+    if (arr && arr.length > 0 && func) {
+        var length = arr.length;
+        var i;
+        if (reversed !== true) {
+            for (i = 0; i < length; ++i) {
+                if (func(arr[i]) === true) {
+                    return true;
+                }
+            }
+        } else {
+            for (i = length - 1; i >= 0; --i) {
+                if (func(arr[i]) === true) {
+                    return true;
+                }
+            }
+        }
+    }
+    return false;
+}
+
+function onEachLazy(lazyArray, func, reversed) {
+    return onEach(
+        Array.prototype.slice.call(lazyArray),
+        func,
+        reversed);
+}
+
+// eslint-disable-next-line no-unused-vars
+function hasOwnProperty(obj, property) {
+    return Object.prototype.hasOwnProperty.call(obj, property);
+}
+
+window.addEventListener("load", function() {
+    "use strict;"
+
+    var main = document.getElementById("main");
+    var btnToTop = document.getElementById("btn-to-top");
+
+    function labelForToggleButton(isCollapsed) {
+        if (isCollapsed) {
+            return "+";
+        }
+        return "\u2212";
+    }
+
+    function createToggle(isCollapsed) {
+        var toggle = document.createElement("a");
+        toggle.href = "javascript:void(0)";
+        toggle.className = "collapse-toggle";
+        toggle.innerHTML = "[<span class=\"inner\">"
+                         + labelForToggleButton(isCollapsed)
+                         + "</span>]";
+
+        return toggle;
+    }
+
+    function toggleClicked() {
+        if (hasClass(this, "collapsed")) {
+            removeClass(this, "collapsed");
+            this.innerHTML = "[<span class=\"inner\">"
+                           + labelForToggleButton(false)
+                           + "</span>]";
+            onEachLazy(this.parentNode.getElementsByClassName("docblock"), function(e) {
+                removeClass(e, "hidden");
+            });
+        } else {
+            addClass(this, "collapsed");
+            this.innerHTML = "[<span class=\"inner\">"
+                           + labelForToggleButton(true)
+                           + "</span>]";
+            onEachLazy(this.parentNode.getElementsByClassName("docblock"), function(e) {
+                addClass(e, "hidden");
+            });
+        }
+    }
+
+    onEachLazy(document.getElementsByClassName("toggle-wrapper"), function(e) {
+        let sectionHeader = e.querySelector(".section-header");
+        let fragmentMatches = sectionHeader !== null && location.hash === "#" + sectionHeader.getAttribute('id');
+        collapsedByDefault = hasClass(e, "default-hide") && !fragmentMatches;
+        var toggle = createToggle(collapsedByDefault);
+        toggle.onclick = toggleClicked;
+        e.insertBefore(toggle, e.firstChild);
+        if (collapsedByDefault) {
+            addClass(toggle, "collapsed");
+            onEachLazy(e.getElementsByClassName("docblock"), function(d) {
+                addClass(d, "hidden");
+            });
+        }
+    });
+
+    function scrollBackTop(e) {
+        e.preventDefault();
+        window.scroll({
+            top: 0,
+            behavior: 'smooth',
+        });
+    }
+
+    function toggleScrollButton() {
+        if (window.scrollY < 400) {
+            addClass(btnToTop, "hidden");
+        } else {
+            removeClass(btnToTop, "hidden");
+        }
+    }
+
+    window.onscroll = toggleScrollButton;
+    btnToTop.onclick = scrollBackTop;
+}, false);

.gitlab-ci/pages/style.css

@@ -0,0 +1,747 @@
+/*
+ * SPDX-FileCopyrightText: 2021 GNOME Foundation
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+@import url("fonts.css");
+
+/*********************************
+ * LIGHT THEME
+ *********************************/
+:root {
+
+  /* colors */
+  --text-color: #333;
+  --text-color-muted: #999;
+  --primary: rgb(28, 118, 228);
+  --body-bg: #fff;
+  --sidebar-primary: rgb(144, 194, 255);
+  --sidebar-bg: #151515;
+  --sidebar-selected-bg: var(--primary);
+  --sidebar-text-color: #fafafa;
+  --sidebar-padding: 1.5em;
+
+  /* boxes, e.g. code blocks */
+  --box-bg: rgba(135, 135, 135, 0.085);
+  --box-radius: 0.35rem;
+  --box-padding: 0.75rem;
+  --box-margin: 0.75rem 0;
+  --box-text-color: #111;
+
+  /* typography */
+  --body-font-family: "Noto Serif",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";
+  --body-font-scale: 0.95;
+  --body-font-size: calc(var(--body-font-scale) * clamp(16px, 1vw, 20px));
+  --body-font-weight: normal;
+
+  --monospace-font-family: "Source Code Pro", monospace;
+  --monospace-font-size: calc(0.86 * var(--body-font-size)); /* Monospace fonts are very different in terms of font-sizes. Adjust this value to scale it */
+
+  --heading-font-family: "Red Hat Display", var(--body-font-family);
+  --heading-weight: 900;
+  --heading-font-scale: 1.05;
+
+  --heading-small-font-family: var(--heading-font-family);
+  --heading-small-weight: 600;
+  --heading-small-font-scale: 1;
+
+  --heading-table-font-family: var(--heading-font-family);
+  --heading-table-weight: 600;
+
+  --heading-docblock-color: #6d6d6d;  /* docblocks have headings from source comments. we want them to differ.*/
+  --heading-docblock-scale: 0.9;        /* docblocks have headings from source comments. we want them to differ.*/
+
+  --symbol-font-family: var(--heading-font-family);
+  --symbol-font-weight: 500;
+  --symbol-font-scale: 1;
+
+  --table-font-size: 0.92em;    /* Tables often contain lots information. It's better to scale them down a big to get more sutff fitted inside */
+
+  /* misc */
+  --prefered-content-width: 90ch; /* The preferred width for the readable content */
+  --anchor-sign: "#";
+
+} 
+
+/*********************************
+ * DARK THEME (overrides)
+ *********************************/
+ @media (prefers-color-scheme: dark) {
+  :root {
+    --primary: rgb(144, 194, 255);
+    --text-color: #f6f6f6;
+    --text-color-muted: #686868;
+    --body-bg: #121212;
+    --sidebar-primary: rgb(144, 194, 255);
+    --sidebar-bg: #1e1e1e;
+    --sidebar-selected-bg: rgb(17, 112, 228);
+    --sidebar-text-color: #fafafa;
+    --box-bg: rgba(135, 135, 135, 0.1);
+    --box-text-color: #fff;
+    --heading-docblock-color: #b7b7b7;
+  }
+
+  /* fix dark theme syntax highlighting with a filter (for now) */
+  .highlight pre span {
+  	filter: brightness(6);
+  }
+}
+
+/*********************************
+ * GENERAL STYLING
+ *********************************/
+*,
+*:before,
+*:after {
+  box-sizing: border-box;
+}
+
+::-moz-selection {
+  color: white;
+  background: var(--primary);
+}
+
+::selection {
+  color: white;
+  background: var(--primary);
+}
+
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+
+::-webkit-scrollbar-thumb {
+  border-radius: 10px;
+  background: rgba(128, 128, 128, 0.6);
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: rgba(128, 128, 128, 1);
+}
+
+::-webkit-scrollbar-track {
+  background: rgba(128, 128, 128, 0.15);
+}
+
+* {
+  scrollbar-width: initial;
+}
+
+body {
+  font: 16px/1.5 var(--body-font-family);
+  font-weight: var(--body-font-weight);
+  font-size: var(--body-font-size);
+  margin: 0;
+  padding: 0;
+  position: relative;
+
+  -webkit-font-feature-settings: "kern", "liga";
+  -moz-font-feature-settings: "kern", "liga";
+  font-feature-settings: "kern", "liga";
+  color: var(--text-color);
+  background: var(--body-bg);
+}
+
+h1, h2, h3, h4, h5, h6 {
+  font-family: var(--heading-font-family);
+  font-weight: var(--heading-weight);
+  margin: 1.75em 0 0.75em 0;
+  display: flex;
+  align-items: center;
+}
+
+h1 {
+  font-size: calc(1.75em * var(--heading-font-scale));
+}
+
+
+header h1 {
+  margin-top: 0;
+}
+
+h2 {
+  font-size: calc(1.4em * var(--heading-font-scale));
+}
+
+h3 {
+  font-size: calc(1.2em * var(--heading-font-scale));
+}
+
+header h3 {
+  color: var(--text-color-muted);
+  margin-bottom: 0;
+}
+
+h4, h5 {
+  font-size: calc(1em * var(--heading-font-scale));
+}
+
+h6 {
+  font-size: calc(1em * var(--heading-small-font-scale));
+  font-family: var(--heading-small-font-family);
+  font-weight: var(--heading-small-weight);
+}
+
+ol, ul {
+  padding-left: 1rem;
+}
+
+ul ul, ol ul, ul ol, ol ol {
+  margin-bottom: .6em;
+}
+
+p {
+  margin: 0 0 .6em 0;
+}
+
+a {
+  color: var(--primary);
+  text-decoration: none;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+summary {
+  outline: none;
+}
+
+blockquote {
+  border-left: 3px solid var(--primary);
+  background: var(--box-bg);
+  padding: var(--box-padding);
+  border-radius: var(--box-radius);
+  margin: var(--box--margin);
+}
+
+code, 
+pre {
+  font-family: var(--monospace-font-family);
+  font-size: var(--monospace-font-size);
+  color: var(--box-text-color);
+}
+
+pre {
+  background: var(--box-bg);
+  padding: var(--box-padding);
+  border-radius: var(--box-radius);
+  overflow: auto;
+}
+
+code {
+  background: var(--box-bg);
+  padding: 0 0.35em;
+  border-radius: 0.35rem;
+  word-break: break-word;
+}
+
+a > code {
+  color: var(--primary);
+}
+
+
+pre pre,
+pre code {
+  padding: 0;
+  margin: 0;
+  font-size: 1em;
+  background: none;
+  color: inherit;
+}
+
+h1 code, h2 code, h3 code, h4 code, h5 code, h6 code {
+  font-family: inherit;
+  font-weight: inherit;
+  font-size: 0.85em;
+}
+
+strong, b {
+  font-weight: 600;
+}
+
+/* fix unwanted margins in tables, code, lists and blockquotes */
+li > *:first-child,
+li > *:first-child > *:first-child,
+li > *:first-child > *:first-child > *:first-child,
+td > *:first-child,
+td > *:first-child > *:first-child,
+td > *:first-child > *:first-child > *:first-child,
+pre > *:first-child,
+pre > *:first-child > *:first-child,
+pre > *:first-child > *:first-child > *:first-child,
+blockquote > *:first-child,
+blockquote > *:first-child > *:first-child,
+blockquote > *:first-child > *:first-child > *:first-child {
+  margin-top: 0;
+}
+li > *:last-child,
+li > *:last-child > *:last-child,
+li > *:last-child > *:last-child > *:last-child,
+td > *:last-child,
+td > *:last-child > *:last-child,
+td > *:last-child > *:last-child > *:last-child,
+pre > *:last-child,
+pre > *:last-child > *:last-child,
+pre > *:last-child > *:last-child > *:last-child,
+blockquote > *:last-child,
+blockquote > *:last-child > *:last-child,
+blockquote > *:last-child > *:last-child > *:last-child {
+  margin-bottom: 0;
+}
+
+/*********************************
+ * PAGE STRUCTURE
+ *********************************/
+#body-wrapper {
+  display: flex;
+  flex-wrap: nowrap;
+  flex-direction: row;
+}
+
+#body-wrapper:focus {
+  outline: none;
+}
+
+#main {
+  position: relative;
+  flex-grow: 1;
+  min-width: 0;
+  box-shadow: 0 0 134px rgba(0, 0, 0, 0.1);
+}
+
+footer {
+  width: 100%;
+  display: none;
+}
+
+/*********************************
+ * Button
+ *********************************/
+
+#btn-to-top {
+  position: fixed;
+  bottom: 12px;
+  right: 32px;
+  z-index: 1000;
+  border-radius: 50%;
+  width: 42px;
+  height: 42px;
+  border: 1px solid var(--primary);
+  background: var(--box-bg);
+  color: var(--text-color);
+  cursor: pointer;
+  text-transform: none;
+}
+
+#btn-to-top > .up-arrow:after {
+  content: "🡅"
+}
+
+/*********************************
+ * SIDEBAR
+ *********************************/
+.sidebar {
+  scrollbar-width: thin;
+  background: var(--sidebar-bg);
+  border-right: 1px solid var(--sidebar-bg);
+  min-width: 40ch;
+  padding: var(--sidebar-padding);
+  color: var(--sidebar-text-color);
+  position: sticky;
+  top: 0;
+  z-index: 2;
+  height: 100vh;
+  overflow-y: auto;
+}
+
+.sidebar a,
+.sidebar a:hover {
+  text-decoration: none;
+}
+
+.sidebar .logo {
+  display: block;
+  margin: 2rem auto 0 auto;
+  width: 70%;
+}
+
+.sidebar .section > ul > li {
+  margin-right: -10px;
+}
+
+.sidebar .section h3, .sidebar .section h5 {
+  text-align: left;
+  padding-left: 0.5rem;
+  padding-right: 0.5rem;
+  font-weight: var(--heading-weight);
+}
+
+.sidebar .section h5 {
+  font-size: 1em;
+  margin-bottom: 0.5em;
+}
+
+.sidebar .namespace > h3 {
+  margin-bottom: 0;
+  padding: 0;
+  font-size: 1.5em;
+  text-transform: uppercase;
+  font-weight: 900;
+}
+
+.sidebar .namespace > p {
+  font-size: 0.9em;
+  opacity: 0.8;
+  padding-left: 0.5rem;
+}
+
+.sidebar .section {
+  padding-left: 0.5rem;
+  padding-right: 0.5rem;
+}
+
+.sidebar .links {
+  margin-bottom: 1rem;
+}
+
+.sidebar .section a {
+  display: block;
+  text-overflow: ellipsis;
+  overflow: hidden;
+  transition: background-color 150ms ease;
+  color: var(--sidebar-primary);
+  border-radius: var(--box-radius);
+   padding: 0.2rem 0.5rem;
+  margin-bottom: 0.15rem;
+}
+
+.sidebar .section a:hover {
+  background-color: rgba(127, 127, 127, 0.2);
+  color: var(--sidebar-text-color);
+}
+
+.sidebar .section a.current {
+  background-color: var(--sidebar-selected-bg);
+  color: white;
+}
+
+.sidebar .search {
+  box-sizing: border-box;
+  text-align: center;
+}
+
+.sidebar .search input[type="text"] {
+  border-color: transparent;
+  width: 100%;
+  border: 1px solid #ccc;
+  border-radius: 50px;
+  padding: 6px 12px;
+  display: inline-block;
+  font-size: 80%;
+  box-shadow: inset 0 1px 3px #ddd;
+  transition: border .3s linear;
+}
+
+/*********************************
+ * ANCHORS & TOGGLERS
+ *********************************/
+.anchor,
+.md-anchor {
+  position: relative;
+  z-index: 1;
+  text-decoration: none;
+  padding: 0 0.5em;
+  color: var(--text-color-muted);
+}
+
+.anchor:hover,
+.md-anchor:hover {
+  color: var(--primary);
+}
+
+.anchor:not([href]),
+.md-anchor:not([href]) {
+  display: none;
+}
+
+.anchor:before,
+.md-anchor:before {
+  content: var(--anchor-sign); /*'§'*/
+}
+
+.toggle-wrapper {
+  position: relative;
+}
+
+.collapse-toggle {
+  position: absolute;
+  right: 0;
+  left: -2em;
+  white-space: nowrap;
+  text-decoration: none;
+  font-size: 0.8em;
+  color: transparent;
+}
+
+.collapse-toggle > .inner {
+  width: 1rem;
+  height: 1rem;
+  border-radius: calc(0.75 * var(--box-radius));
+  display: inline-flex;
+  justify-content: center;
+  align-items: center;
+  text-align: center;
+  vertical-align: middle;
+  color: var(--box-text-color);
+  position: relative;
+  left: -0.25rem;
+  font-family: monospace;
+  font-size: 0.7rem;
+  font-weight: bold;
+  background: var(--box-bg);
+}
+
+/*********************************
+ * UTILITY
+ *********************************/
+.deprecated > h6 > a {
+  opacity: 0.65;
+}
+
+.hidden {
+  display: none !important;
+}
+
+/*********************************
+ * CONTENT STYLING
+ *********************************/
+.content {
+  padding: 2em 4em;
+  overflow: visible;
+  max-width: calc(var(--prefered-content-width) + 8em);
+}
+
+.content table:not(.table-display) {
+  border-spacing: 0 0.25rem;
+}
+
+.content td {
+  vertical-align: top;
+}
+
+.content td:first-child {
+  padding-right: 1rem;
+}
+
+.content td p:first-child {
+  margin-top: 0;
+}
+
+.content td h1, .content td h2 {
+  margin-left: 0;
+  font-size: 1.1em;
+}
+
+.content tr:first-child td {
+  border-top: 0;
+}
+
+kbd {
+  display: inline-block;
+  padding: 3px 5px;
+  font: 15px monospace;
+  line-height: 10px;
+  vertical-align: middle;
+  border: solid 1px;
+  border-radius: 3px;
+  box-shadow: inset 0 -1px 0;
+  cursor: default;
+}
+
+.content tr:first-child {
+  border-bottom: 1px solid rgba(0, 0, 0, 0.35);
+}
+
+.content td {
+  vertical-align: top;
+}
+
+.content td:first-child {
+  padding-right: 1rem;
+}
+
+.content td p:first-child {
+  margin-top: 0;
+}
+
+.content td h4, .content td h5 {
+  margin-left: 0;
+  font-size: 1.1em;
+}
+
+.content tr:first-child td {
+  border-top: 0;
+}
+
+.srclink {
+  color: var(--text-color-muted);
+  font-size: 1rem;
+  font-weight: var(--body-font-weight);
+  flex-grow: 0;
+  text-decoration: none;
+  margin-left: auto;
+  position: relative;
+  z-index: 1;
+}
+
+.meta tr > td:not(:first-child) {
+  width: 100%;
+}
+
+.meta tr > td:first-child {
+  white-space: nowrap;
+}
+
+/*********************************
+ * DOCBLOCK STYLING
+ *********************************/
+.docblock {
+  position: relative;
+  text-align: left;
+}
+
+.docblock h1 {
+  font-size: calc(1.3em * var(--heading-docblock-scale) * var(--heading-font-scale));
+}
+
+.docblock h2 {
+  font-size: calc(1.2em * var(--heading-docblock-scale) * var(--heading-font-scale));
+}
+
+.docblock h3 {
+  font-size: calc(1.1em * var(--heading-docblock-scale) * var(--heading-font-scale));
+}
+
+.docblock h4 {
+  font-size: calc(1.05em * var(--heading-docblock-scale) * var(--heading-font-scale));
+}
+
+.docblock h1,
+.docblock h2,
+.docblock h3,
+.docblock h4,
+.docblock h5,
+.docblock h6 {
+  color: var(--heading-docblock-color)
+}
+
+.docblock table {
+  margin: .25em 0;
+  max-width: 100%;
+  font-size: var(--table-font-size);
+}
+
+.docblock table td {
+  padding: .25em;
+}
+
+.docblock table th {
+  padding: .25em;
+  text-align: left;
+  font-family: var(--heading-table-font-family);
+  font-weight: var(--heading-table-weight);
+}
+
+.docblock table tr th:first-child,
+.docblock table tr td:first-child {
+  padding-left: 0;
+}
+
+.docblock table tr th:last-child,
+.docblock table tr td:last-child {
+  padding-right: 0;
+}
+
+table.enum-members,
+table.results {
+  border-radius: var(--box-radius);
+  border: 1px solid var(--text-color-muted);
+  border-spacing: 0 0 !important;
+  font-size: 80%;
+}
+
+table.enum-members tr th,
+table.results tr th {
+  border-top-color: var(--body-bg);
+  background-color: var(--box-bg);
+  border-bottom: 1px solid var(--text-color-muted);
+}
+
+table.enum-members tr th:first-child,
+table.enum-members tr td:first-child {
+  min-width: 25em;
+  padding-left: .5em;
+}
+
+table.results tr th:first-child,
+table.results tr td:first-child {
+  padding-left: .5em;
+}
+
+table.enum-members tr th:last-child,
+table.enum-members tr td:last-child,
+table.results tr th:last-child,
+table.results tr td:last-child {
+  max-width: 35em;
+  padding-right: .5em;
+}
+
+table.results tr td code {
+  font-size: 100%;
+}
+
+.docblock ul li,
+.docblock ol li {
+  padding-top: 0.15rem;
+  padding-bottom: 0.15rem;
+}
+
+.docblock ul.type {
+  list-style: none;
+}
+
+.docblock ul.type li::before {
+  content: "»";
+  color: var(--text-color);
+  display: inline-block;
+  width: 1em;
+  margin-left: -1em;
+}
+
+/**************************
+ RESPONSIVENESS
+**************************/
+@media (max-width: 700px) {
+  body {
+    padding-top: 0px;
+  }
+
+  #body-wrapper {
+    flex-direction: column;
+    overflow: hidden;
+  }
+
+  #main {
+    width: 100%;
+    padding: 2rem;
+  }
+
+  .sidebar {
+    position: static;
+    height: initial;
+    order: 1;
+  }
+}

.gitlab-ci/run-docker.sh

@@ -1,11 +1,135 @@
 #!/bin/bash
 
+read_arg() {
+    # $1 = arg name
+    # $2 = arg value
+    # $3 = arg parameter
+    local rematch='^[^=]*=(.*)$'
+    if [[ $2 =~ $rematch ]]; then
+        read "$1" <<< "${BASH_REMATCH[1]}"
+    else
+        read "$1" <<< "$3"
+        # There is no way to shift our callers args, so
+        # return 1 to indicate they should do it instead.
+        return 1
+    fi
+}
+
 set -e
 
-TAG="registry.gitlab.gnome.org/gnome/gtk/master:v7"
+build=0
+run=0
+push=0
+list=0
+print_help=0
+no_login=0
 
-sudo docker build --build-arg HOST_USER_ID="$UID" --tag "${TAG}" \
-    --file "Dockerfile" .
-sudo docker run --rm --security-opt label=disable \
-    --volume "$(pwd)/..:/home/user/app" --workdir "/home/user/app" \
-    --tty --interactive "${TAG}" bash
+while (($# > 0)); do
+        case "${1%%=*}" in
+                build) build=1;;
+                run) run=1;;
+                push) push=1;;
+                list) list=1;;
+                help) print_help=1;;
+                --base|-b) read_arg base "$@" || shift;;
+                --version|-v) read_arg base_version "$@" || shift;;
+                --no-login) no_login=1;;
+                *) echo -e "\e[1;31mERROR\e[0m: Unknown option '$1'"; exit 1;;
+        esac
+        shift
+done
+
+if [ $print_help == 1 ]; then
+        echo "$0 - Build and run Docker images"
+        echo ""
+        echo "Usage: $0 <command> [options] [basename]"
+        echo ""
+        echo "Available commands"
+        echo ""
+        echo "  build --base=<BASENAME> - Build Docker image <BASENAME>.Dockerfile"
+        echo "  run --base=<BASENAME>   - Run Docker image <BASENAME>"
+        echo "  push --base=<BASENAME>  - Push Docker image <BASENAME> to the registry"
+        echo "  list                    - List available images"
+        echo "  help                    - This help message"
+        echo ""
+        exit 0
+fi
+
+cd "$(dirname "$0")"
+
+if [ $list == 1 ]; then
+        echo "Available Docker images:"
+        for f in *.Dockerfile; do
+                filename=$( basename -- "$f" )
+                basename="${filename%.*}"
+
+                echo -e "  \e[1;39m$basename\e[0m"
+        done
+        exit 0
+fi
+
+# All commands after this require --base to be set
+if [ -z $base ]; then
+        echo "Usage: $0 <command>"
+        exit 1
+fi
+
+if [ ! -f "$base.Dockerfile" ]; then
+        echo -e "\e[1;31mERROR\e[0m: Dockerfile for '$base' not found"
+        exit 1
+fi
+
+if [ -z $base_version ]; then
+        base_version="latest"
+elif [ $base_version != "latest" ]; then
+        base_version="v$base_version"
+fi
+
+if [ ! -x "$(command -v docker)" ] || [ docker --help |& grep -q podman ]; then
+        # Docker is actually implemented by podman, and its OCI output
+        # is incompatible with some of the dockerd instances on GitLab
+        # CI runners.
+        echo "Using: Podman"
+        format="--format docker"
+        CMD="podman"
+else
+        echo "Using: Docker"
+        format=""
+        CMD="sudo docker"
+fi
+
+REGISTRY="registry.gitlab.gnome.org"
+TAG="${REGISTRY}/gnome/gtk/${base}:${base_version}"
+
+if [ $build == 1 ]; then
+        echo -e "\e[1;32mBUILDING\e[0m: ${base} as ${TAG}"
+        ${CMD} build \
+                ${format} \
+                --build-arg HOST_USER_ID="$UID" \
+                --tag "${TAG}" \
+                --file "${base}.Dockerfile" .
+        exit $?
+fi
+
+if [ $push == 1 ]; then
+        echo -e "\e[1;32mPUSHING\e[0m: ${base} as ${TAG}"
+
+        if [ $no_login == 0 ]; then
+                ${CMD} login ${REGISTRY}
+        fi
+
+        ${CMD} push ${TAG}
+        exit $?
+fi
+
+if [ $run == 1 ]; then
+        echo -e "\e[1;32mRUNNING\e[0m: ${base} as ${TAG}"
+        ${CMD} run \
+                --rm \
+                --volume "$(pwd)/..:/home/user/app" \
+                --workdir "/home/user/app" \
+                --tty \
+                --interactive "${TAG}" \
+                bash
+        exit $?
+fi

.gitlab-ci/run-style-check-diff.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+set -e
+
+# We need to add a new remote for the upstream master, since this script could
+# be running in a personal fork of the repository which has out of date branches.
+if [ "${CI_PROJECT_NAMESPACE}" != "GNOME" ]; then
+    echo "Retrieving the current upstream repository from ${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}..."
+    git remote add upstream https://gitlab.gnome.org/GNOME/gtk.git
+    git fetch upstream
+    ORIGIN="upstream"
+else
+    echo "Reusing the existing repository on ${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}"
+    ORIGIN="origin"
+fi
+
+# Work out the newest common ancestor between the detached HEAD that this CI job
+# has checked out, and the upstream target branch (which will typically be
+# `upstream/master` or `upstream/gtk-3-24`).
+#
+# `${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}` is only defined if we’re running in
+# a merge request pipeline; fall back to `${CI_DEFAULT_BRANCH}` otherwise.
+newest_common_ancestor_sha=$(diff --old-line-format='' --new-line-format='' <(git rev-list --first-parent "${ORIGIN}/${CI_MERGE_REQUEST_TARGET_BRANCH_NAME:-${CI_DEFAULT_BRANCH}}") <(git rev-list --first-parent HEAD) | head -1)
+git diff -U0 --no-color "${newest_common_ancestor_sha}" | .gitlab-ci/clang-format-diff.py -binary "clang-format" -p1
+exit_status=$?
+
+# The style check is not infallible. The clang-format configuration cannot
+# perfectly describe GTK’s coding style: in particular, it cannot align
+# function arguments. The documented coding style for GTK takes priority over
+# clang-format suggestions. Hopefully we can eventually improve clang-format to
+# be configurable enough for our coding style. That’s why this CI check is OK
+# to fail: the idea is that people can look through the output and ignore it if
+# it’s wrong. (That situation can also happen if someone touches pre-existing
+# badly formatted code and it doesn’t make sense to tidy up the wider coding
+# style with the changes they’re making.)
+echo ""
+echo "Note that clang-format output is advisory and cannot always match the"
+echo "GTK coding style, documented at:"
+echo "   https://gitlab.gnome.org/GNOME/gtk/blob/master/docs/CODING-STYLE"
+echo "Warnings from this tool can be ignored in favour of the documented "
+echo "coding style, or in favour of matching the style of existing"
+echo "surrounding code."
+
+exit ${exit_status}

.gitlab-ci/run-tests.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+
+set +x
+set +e
+
+srcdir=$( pwd )
+builddir=$1
+backend=$2
+
+# Ignore memory leaks lower in dependencies
+export LSAN_OPTIONS=suppressions=$srcdir/lsan.supp:print_suppressions=0
+export G_SLICE=always-malloc
+
+case "${backend}" in
+  x11)
+    xvfb-run -a -s "-screen 0 1024x768x24 -noreset" \
+          meson test -C ${builddir} \
+                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
+                --print-errorlogs \
+                --setup=${backend} \
+                --suite=gtk \
+                --no-suite=gsk-compare-broadway
+
+    # Store the exit code for the CI run, but always
+    # generate the reports
+    exit_code=$?
+    ;;
+
+  wayland)
+    export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
+
+    weston --backend=headless-backend.so --socket=wayland-5 --idle-time=0 &
+    compositor=$!
+    export WAYLAND_DISPLAY=wayland-5
+
+    meson test -C ${builddir} \
+                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
+                --print-errorlogs \
+                --setup=${backend} \
+                --suite=gtk \
+                --no-suite=gsk-compare-broadway
+
+    exit_code=$?
+    kill ${compositor}
+    ;;
+
+  broadway)
+    export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
+
+    ${builddir}/gdk/broadway/gtk4-broadwayd :5 &
+    server=$!
+    export BROADWAY_DISPLAY=:5
+
+    meson test -C ${builddir} \
+                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
+                --print-errorlogs \
+                --setup=${backend} \
+                --suite=gtk \
+                --no-suite=gsk-compare-opengl
+
+    # don't let Broadway failures fail the run, for now
+    exit_code=0
+    kill ${server}
+    ;;
+esac
+
+cd ${builddir}
+
+$srcdir/.gitlab-ci/meson-junit-report.py \
+        --project-name=gtk \
+        --backend=${backend} \
+        --job-id="${CI_JOB_NAME}" \
+        --output=report-${backend}.xml \
+        meson-logs/testlog-${backend}.json
+$srcdir/.gitlab-ci/meson-html-report.py \
+        --project-name=gtk \
+        --backend=${backend} \
+        --job-id="${CI_JOB_NAME}" \
+        --reftest-output-dir="testsuite/reftests/output/${backend}" \
+        --output=report-${backend}.html \
+        meson-logs/testlog-${backend}.json
+
+exit $exit_code

.gitlab-ci/show-execution-environment.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -eux -o pipefail
+
+xcodebuild -version || :
+xcodebuild -showsdks || :
+
+system_profiler SPSoftwareDataType || :

.gitlab-ci/test-docker.sh

@@ -16,6 +16,7 @@ meson \
         -Dwayland-backend=true \
         -Dbroadway-backend=true \
         -Dvulkan=yes \
+        -Dprofiler=true \
         --werror \
         ${EXTRA_MESON_FLAGS:-} \
         _build $srcdir

.gitlab-ci/test-msys2.sh

@@ -33,14 +33,29 @@ pacman --noconfirm -S --needed \
     mingw-w64-$MSYS2_ARCH-gst-plugins-bad \
     mingw-w64-$MSYS2_ARCH-shared-mime-info
 
-# https://gitlab.gnome.org/GNOME/gtk/issues/2243
-wget "https://gitlab.gnome.org/creiter/gitlab-ci-win32-runner/raw/master/pango/mingw-w64-$MSYS2_ARCH-pango-1.44.7-1-any.pkg.tar.xz"
-pacman --noconfirm -U "mingw-w64-$MSYS2_ARCH-pango-1.44.7-1-any.pkg.tar.xz"
-
 mkdir -p _ccache
 export CCACHE_BASEDIR="$(pwd)"
 export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
 
+# https://gitlab.gnome.org/GNOME/gtk/-/issues/2243
+# https://gitlab.gnome.org/GNOME/gtk/-/issues/3002
+
+if ! pkg-config --atleast-version=2.65.0 glib-2.0; then
+    git clone https://gitlab.gnome.org/GNOME/glib.git _glib
+    meson setup _glib_build _glib
+    meson compile -C _glib_build
+    meson install -C _glib_build
+fi
+pkg-config --modversion glib-2.0
+
+if ! pkg-config --atleast-version=1.47.0 pango; then
+    git clone https://gitlab.gnome.org/GNOME/pango.git _pango
+    meson setup _pango_build _pango
+    meson compile -C _pango_build
+    meson install -C _pango_build
+fi
+pkg-config --modversion pango
+
 # Build
 ccache --zero-stats
 ccache --show-stats
@@ -49,8 +64,9 @@ meson \
     -Dx11-backend=false \
     -Dwayland-backend=false \
     -Dwin32-backend=true \
-    -Dvulkan=no \
-    --werror \
+    -Dvulkan=disabled \
+    -Dintrospection=enabled \
+    -Dgtk:werror=true \
     _build
 unset CCACHE_DISABLE
 

.gitlab/issue_templates/Bug.md

@@ -1,4 +1,13 @@
+<!--
+  Please, read the CONTRIBUTING.md guide on how to file a new issue.
+
+  https://gitlab.gnome.org/GNOME/gtk/-/blob/master/CONTRIBUTING.md
+-->
 ## Steps to reproduce
+<!--
+  Please, explain the sequence of actions necessary to reproduce the
+  bug
+-->
 
  1. ...
  2. ...
@@ -32,5 +41,8 @@
 ## Additional information
 <!--
  - Screenshots or screen recordings are useful for visual errors
+  - Attaching a screenshot or a video without explaining the current
+    behavior and the actions necessary to reproduce the bug will lead
+    to the bug being closed
  - Please report any warning or message printed on the terminal
 -->

.gitlab/issue_templates/Crash.md

@@ -1,4 +1,14 @@
+<!--
+  Please, read the CONTRIBUTING.md guide on how to file a new issue.
+
+  https://gitlab.gnome.org/GNOME/gtk/-/blob/master/CONTRIBUTING.md
+-->
+
 ## Steps to reproduce
+<!--
+  Please, explain the sequence of actions necessary to reproduce the
+  crash
+-->
 
  1. ...
  2. ...

AUTHORS

@@ -1,5 +1,5 @@
-Please do not mail any of the authors listed here 
-asking questions about this version of GTK+. 
+Please do not mail any of the authors listed here
+asking questions about this version of GTK.
 
 Original Authors
 ----------------
@@ -7,8 +7,8 @@ Peter Mattis      <petm@xcf.berkeley.edu>
 Spencer Kimball   <spencer@xcf.berkeley.edu>
 Josh MacDonald    <jmacd@xcf.berkeley.edu>
 
-The GTK+ Team (in alphabetical order)
--------------------------------------
+The Team that build GTK 2 (in alphabetical order)
+-------------------------------------------------
 Shawn T. Amundson <amundson@gtk.org>
 Jerome Bolliet    <bolliet@gtk.org>
 Damon Chaplin     <damon@gtk.org>
@@ -28,11 +28,24 @@ Jay Painter       <jpaint@gtk.org>
 Manish Singh      <manish@gtk.org>
 Owen Taylor       <otaylor@gtk.org>
 
+The current team (GTK 3 and 4)
+------------------------------
+
+Jonas Ådahl       <jadahl@gmail.com>
+Tim Bäder         <mail@baedert.org>
+Emmanuele Bassi   <ebassi@gnome.org>
+Chun-wei Fan      <fanchunwei@src.gnome.org>
+Matthias Clasen   <mclasen@redhat.com>
+Carlos Garnacho   <mrgarnacho@gmail.com>
+Alexander Larsson <alexl@redhat.com>
+Benjamin Otte     <otte@gnome.org>
+
+
 There are many others who have contributed patches; we thank them,
-GTK+ is much better because of them.
+GTK is much better because of them.
 
 
-Over time, GTK+ has incorporated some pieces of software which 
+Over time, GTK has incorporated some pieces of software which
 started as independent projects. We list the original authors here:
 
 
@@ -63,3 +76,8 @@ DirectFB backend
 Denis Oliver Kropp
 Sven Neumann
 Mike Emmel
+
+
+gtkparasite
+-----------
+Christian Hammond

CONTRIBUTING.md

@@ -22,12 +22,7 @@ Please, do not use the issue tracker for support questions. If you have
 questions on how to use GTK effectively, you can use:
 
  - the `#gtk` IRC channel on irc.gnome.org
- - the [gtk](https://mail.gnome.org/mailman/listinfo/gtk-list) mailing list,
-   for general questions on GTK
- - the [gtk-app-devel](https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list)
-   mailing list, for questions on application development with GTK
- - the [gtk-devel](https://mail.gnome.org/mailman/listinfo/gtk-devel-list)
-   mailing list, for questions on developing GTK itself
+ - the [gtk tag on the GNOME Discourse instance](https://discourse.gnome.org/tag/gtk)
 
 You can also look at the GTK tag on [Stack
 Overflow](https://stackoverflow.com/questions/tagged/gtk).
@@ -61,6 +56,12 @@ If the issue includes a crash, you should also include:
  0. the eventual warnings printed on the terminal
  0. a backtrace, obtained with tools such as GDB or LLDB
 
+It is fine to include screenshots of screen recordings to demonstrate
+an issue that is best to understand visually, but please don't just
+dump screen recordings without further details into issues. It is
+essential that the problem is described in enough detail to reproduce
+it without watching a video.
+
 For small issues, such as:
 
  - spelling/grammar fixes in the documentation

README.md

@@ -1,7 +1,7 @@
 GTK — The GTK toolkit
 =====================
 
-[![Build Status](https://gitlab.gnome.org/GNOME/gtk/badges/master/build.svg)](https://gitlab.gnome.org/GNOME/gtk/pipelines)
+[![Build status](https://gitlab.gnome.org/GNOME/gtk/badges/master/pipeline.svg)](https://gitlab.gnome.org/GNOME/gtk/-/commits/master)
 
 General information
 -------------------
@@ -17,7 +17,7 @@ license fees or royalties.
 
 The official download location
 
-  - https://download.gnome.org/sources/gtk+
+  - https://download.gnome.org/sources/gtk/
 
 The official web site
 
@@ -27,14 +27,14 @@ The official developers blog
 
   - https://blog.gtk.org
 
-Information about mailing lists can be found at
+Discussion forum
 
-  - http://www.gtk.org/mailing-lists.php
+  - https://discourse.gnome.org/c/platform/core/
 
 Nightly documentation can be found at
-  - Gtk: https://gnome.pages.gitlab.gnome.org/gtk/gtk/
-  - Gdk: https://gnome.pages.gitlab.gnome.org/gtk/gdk/
-  - Gsk: https://gnome.pages.gitlab.gnome.org/gtk/gsk/
+  - Gtk: https://gnome.pages.gitlab.gnome.org/gtk/gtk4/
+  - Gdk: https://gnome.pages.gitlab.gnome.org/gtk/gdk4/
+  - Gsk: https://gnome.pages.gitlab.gnome.org/gtk/gsk4/
 
 Building and installing
 -----------------------
@@ -49,14 +49,13 @@ In order to build GTK you will need:
 You will also need various dependencies, based on the platform you are
 building for:
 
-  - [GLib](https://download.gnome.org/sources/glib)
-  - [GdkPixbuf](https://download.gnome.org/sources/gdk-pixbuf)
-  - [GObject-Introspection](https://download.gnome.org/sources/gobject-introspection)
-  - [Cairo](https://www.cairographics.org)
-  - [Pango](https://download.gnome.org/sources/pango)
+  - [GLib](https://download.gnome.org/sources/glib/)
+  - [GdkPixbuf](https://download.gnome.org/sources/gdk-pixbuf/)
+  - [GObject-Introspection](https://download.gnome.org/sources/gobject-introspection/)
+  - [Cairo](https://www.cairographics.org/)
+  - [Pango](https://download.gnome.org/sources/pango/)
   - [Epoxy](https://github.com/anholt/libepoxy)
   - [Graphene](https://github.com/ebassi/graphene)
-  - [ATK](https://download.gnome.org/sources/atk)
   - [Xkb-common](https://github.com/xkbcommon/libxkbcommon)
 
 If you are building the X11 backend, you will also need:
@@ -70,7 +69,6 @@ If you are building the X11 backend, you will also need:
     - xcursor
     - xdamage
     - xcomposite
-  - [atk-bridge-2.0](https://download.gnome.org/sources/at-spi2-atk)
 
 If you are building the Wayland backend, you will also need:
 
@@ -100,7 +98,7 @@ And, finally, you can install GTK using:
 $ sudo ninja install
 ```
 
-Complete information about installing GTK+ and related libraries
+Complete information about installing GTK and related libraries
 can be found in the file:
 
 ```
@@ -140,6 +138,12 @@ In the bug report please include:
 * Further information such as stack traces may be useful, but
   is not necessary.
 
+Contributing to GTK
+-------------------
+
+Please, follow the [contribution guide](./CONTRIBUTING.md) to know how to
+start contributing to GTK.
+
 Release notes
 -------------
 
@@ -156,4 +160,8 @@ GTK is released under the terms of the GNU Lesser General Public License,
 version 2.1 or, at your option, any later version, as published by the Free
 Software Foundation.
 
-Please, see the `COPYING` file for further information.
+Please, see the [`COPYING`](./COPYING) file for further information.
+
+GTK includes a small number of source files under the Apache license:
+- A fork of the roaring bitmaps implementation in [gtk/roaring](./gtk/roaring)
+- An adaptation of timsort from python in [gtk/timsort](./gtk/timsort)

build-aux/flatpak/org.gtk.Demo4.json

@@ -1,72 +1,119 @@
 {
-    "app-id": "org.gtk.Demo4",
-    "runtime": "org.gnome.Platform",
-    "runtime-version": "master",
-    "sdk": "org.gnome.Sdk",
-    "command": "gtk4-demo",
-    "tags": ["devel", "development", "nightly"],
-    "desktop-file-name-prefix": "(Development) ",
-    "finish-args": [
+    "app-id" : "org.gtk.Demo4",
+    "runtime" : "org.gnome.Platform",
+    "runtime-version" : "master",
+    "sdk" : "org.gnome.Sdk",
+    "command" : "gtk4-demo",
+    "tags" : [
+        "devel",
+        "development",
+        "nightly"
+    ],
+    "desktop-file-name-prefix" : "(Development) ",
+    "finish-args" : [
         "--device=dri",
         "--share=ipc",
         "--socket=fallback-x11",
         "--socket=wayland",
-        "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*"
+        "--talk-name=org.gtk.vfs",
+        "--talk-name=org.gtk.vfs.*"
     ],
-    "cleanup": [
+    "cleanup" : [
         "/include",
-        "/lib/pkgconfig", "/share/pkgconfig",
+        "/lib/pkgconfig",
+        "/share/pkgconfig",
         "/share/aclocal",
-        "/man", "/share/man", "/share/gtk-doc",
-        "*.la", ".a",
+        "/man",
+        "/share/man",
+        "/share/gtk-doc",
+        "*.la",
+        ".a",
         "/lib/girepository-1.0",
         "/share/gir-1.0",
         "/share/doc"
     ],
-    "modules": [
+    "modules" : [
         {
             "name" : "wayland",
-            "buildsystem" : "autotools",
+            "buildsystem" : "meson",
             "builddir" : true,
             "config-opts" : [
-                "--disable-documentation"
+                "-Ddocumentation=false"
             ],
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
                 }
             ]
         },
         {
-            "name": "graphene",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "graphene",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib",
                 "-Dtests=false",
                 "-Dbenchmarks=false"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://github.com/ebassi/graphene.git"
+                    "type" : "git",
+                    "url" : "https://github.com/ebassi/graphene.git"
                 }
             ]
         },
         {
-            "name": "gtk",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "libsass",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/gtk.git"
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/libsass.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "sassc",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/sassc.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "gtk",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib",
+                "-Denable_vulkan=no",
+                "-Dbuildtype=debugoptimized",
+                "-Dprofile=devel"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
                 }
             ]
         }
-    ]
+    ],
+    "build-options" : {
+        "env" : {
+            "GSK_RENDERER" : "opengl"
+        }
+    }
 }

build-aux/flatpak/org.gtk.IconBrowser4.json

@@ -1,72 +1,118 @@
 {
-    "app-id": "org.gtk.IconBrowser4",
-    "runtime": "org.gnome.Platform",
-    "runtime-version": "master",
-    "sdk": "org.gnome.Sdk",
-    "command": "gtk4-icon-browser",
-    "tags": ["devel", "development", "nightly"],
-    "desktop-file-name-prefix": "(Development) ",
-    "finish-args": [
+    "app-id" : "org.gtk.IconBrowser4",
+    "runtime" : "org.gnome.Platform",
+    "runtime-version" : "master",
+    "sdk" : "org.gnome.Sdk",
+    "command" : "gtk4-icon-browser",
+    "tags" : [
+        "devel",
+        "development",
+        "nightly"
+    ],
+    "desktop-file-name-prefix" : "(Development) ",
+    "finish-args" : [
         "--device=dri",
         "--share=ipc",
         "--socket=fallback-x11",
         "--socket=wayland",
-        "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*"
+        "--talk-name=org.gtk.vfs",
+        "--talk-name=org.gtk.vfs.*"
     ],
-    "cleanup": [
+    "cleanup" : [
         "/include",
-        "/lib/pkgconfig", "/share/pkgconfig",
+        "/lib/pkgconfig",
+        "/share/pkgconfig",
         "/share/aclocal",
-        "/man", "/share/man", "/share/gtk-doc",
-        "*.la", ".a",
+        "/man",
+        "/share/man",
+        "/share/gtk-doc",
+        "*.la",
+        ".a",
         "/lib/girepository-1.0",
         "/share/gir-1.0",
         "/share/doc"
     ],
-    "modules": [
+    "modules" : [
         {
             "name" : "wayland",
-            "buildsystem" : "autotools",
+            "buildsystem" : "meson",
             "builddir" : true,
             "config-opts" : [
-                "--disable-documentation"
+                "-Ddocumentation=false"
             ],
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
                 }
             ]
         },
         {
-            "name": "graphene",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "graphene",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib",
                 "-Dtests=false",
                 "-Dbenchmarks=false"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://github.com/ebassi/graphene.git"
+                    "type" : "git",
+                    "url" : "https://github.com/ebassi/graphene.git"
                 }
             ]
         },
         {
-            "name": "gtk",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "libsass",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/gtk.git"
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/libsass.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "sassc",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/sassc.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "gtk",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib",
+                "-Denable_vulkan=no",
+                "-Dbuildtype=debugoptimized",
+                "-Dprofile=devel"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
                 }
             ]
         }
-    ]
+    ],
+    "build-options" : {
+        "env" : {
+        }
+    }
 }

build-aux/flatpak/org.gtk.WidgetFactory4.json

@@ -1,72 +1,122 @@
 {
-    "app-id": "org.gtk.WidgetFactory4",
-    "runtime": "org.gnome.Platform",
-    "runtime-version": "master",
-    "sdk": "org.gnome.Sdk",
-    "command": "gtk4-widget-factory",
-    "tags": ["devel", "development", "nightly"],
-    "desktop-file-name-prefix": "(Development) ",
-    "finish-args": [
+    "app-id" : "org.gtk.WidgetFactory4",
+    "runtime" : "org.gnome.Platform",
+    "runtime-version" : "master",
+    "sdk" : "org.gnome.Sdk",
+    "command" : "gtk4-widget-factory",
+    "tags" : [
+        "devel",
+        "development",
+        "nightly"
+    ],
+    "desktop-file-name-prefix" : "(Development) ",
+    "finish-args" : [
         "--device=dri",
         "--share=ipc",
         "--socket=fallback-x11",
         "--socket=wayland",
-        "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*"
+        "--talk-name=org.gtk.vfs",
+        "--talk-name=org.gtk.vfs.*"
     ],
-    "cleanup": [
+    "cleanup" : [
         "/include",
-        "/lib/pkgconfig", "/share/pkgconfig",
+        "/lib/pkgconfig",
+        "/share/pkgconfig",
         "/share/aclocal",
-        "/man", "/share/man", "/share/gtk-doc",
-        "*.la", ".a",
+        "/man",
+        "/share/man",
+        "/share/gtk-doc",
+        "*.la",
+        ".a",
         "/lib/girepository-1.0",
         "/share/gir-1.0",
         "/share/doc"
     ],
-    "modules": [
+    "modules" : [
         {
             "name" : "wayland",
-            "buildsystem" : "autotools",
+            "buildsystem" : "meson",
             "builddir" : true,
             "config-opts" : [
-                "--disable-documentation"
+                "-Ddocumentation=false"
             ],
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
                 }
             ]
         },
         {
-            "name": "graphene",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "graphene",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib",
                 "-Dtests=false",
                 "-Dbenchmarks=false"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://github.com/ebassi/graphene.git"
+                    "type" : "git",
+                    "url" : "https://github.com/ebassi/graphene.git"
                 }
             ]
         },
         {
-            "name": "gtk",
-            "buildsystem": "meson",
-            "builddir": true,
-            "config-opts": [
+            "name" : "libsass",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
                 "--libdir=/app/lib"
             ],
-            "sources": [
+            "sources" : [
                 {
-                    "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/gtk.git"
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/libsass.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "sassc",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/lazka/sassc.git",
+                    "branch" : "meson"
+                }
+            ]
+        },
+        {
+            "name" : "gtk",
+            "buildsystem" : "meson",
+            "builddir" : true,
+            "config-opts" : [
+                "--libdir=/app/lib",
+                "-Denable_vulkan=no",
+                "-Dbuildtype=debugoptimized",
+                "-Dprofile=devel"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
                 }
             ]
         }
-    ]
+    ],
+    "build-options" : {
+        "env" : {
+            "DBUS_SESSION_BUS_ADDRESS" : "''",
+            "GSK_RENDERER" : "opengl",
+            "GDK_DEBUG" : "vulkan-disable",
+            "G_ENABLE_DEBUG" : "true"
+        }
+    }
 }

build-aux/meson/dist-theme.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+
+import os
+from pathlib import PurePath
+import subprocess
+
+stylesheets = [ 'gtk/theme/Adwaita/Adwaita.css',
+                'gtk/theme/Adwaita/Adwaita-dark.css',
+                'gtk/theme/HighContrast/HighContrast.css',
+                'gtk/theme/HighContrast/HighContrast-dark.css' ]
+
+sourceroot = os.environ.get('MESON_SOURCE_ROOT')
+distroot = os.environ.get('MESON_DIST_ROOT')
+
+for stylesheet in stylesheets:
+  stylesheet_path = PurePath(stylesheet)
+  src = PurePath(sourceroot, stylesheet_path.with_suffix('.scss'))
+  dst = PurePath(distroot, stylesheet_path)
+  subprocess.call(['sassc', '-a', '-M', '-t', 'compact', src, dst])

build-aux/meson/post-install.py

@@ -1,31 +1,45 @@
 #!/usr/bin/env python3
-
-import os
-import sys
-import subprocess
-
-if 'DESTDIR' not in os.environ:
-    gtk_api_version = sys.argv[1]
-    gtk_abi_version = sys.argv[2]
+
+import os
+import sys
+import subprocess
+
+if 'DESTDIR' not in os.environ:
+    gtk_api_version = sys.argv[1]
+    gtk_abi_version = sys.argv[2]
     gtk_libdir = sys.argv[3]
     gtk_datadir = sys.argv[4]
-
-    gtk_moduledir = os.path.join(gtk_libdir, 'gtk-' + gtk_api_version, gtk_abi_version)
-    gtk_printmodule_dir = os.path.join(gtk_moduledir, 'printbackends')
-    gtk_immodule_dir = os.path.join(gtk_moduledir, 'immodules')
-
-    print('Compiling GSettings schemas...')
-    subprocess.call(['glib-compile-schemas',
-                    os.path.join(gtk_datadir, 'glib-2.0', 'schemas')])
-
-    print('Updating icon cache...')
-    subprocess.call(['gtk4-update-icon-cache', '-q', '-t' ,'-f',
-                    os.path.join(gtk_datadir, 'icons', 'hicolor')])
-
-    print('Updating module cache for print backends...')
+    gtk_bindir = sys.argv[5]
+
+    gtk_moduledir = os.path.join(gtk_libdir, 'gtk-' + gtk_api_version, gtk_abi_version)
+    gtk_printmodule_dir = os.path.join(gtk_moduledir, 'printbackends')
+    gtk_immodule_dir = os.path.join(gtk_moduledir, 'immodules')
+
+    print('Compiling GSettings schemas...')
+    glib_compile_schemas = subprocess.check_output(['pkg-config',
+                                                   '--variable=glib_compile_schemas',
+                                                   'gio-2.0']).strip()
+    if not os.path.exists(glib_compile_schemas):
+        # pkg-config variables only available since GLib 2.62.0.
+        glib_compile_schemas = 'glib-compile-schemas'
+    subprocess.call([glib_compile_schemas,
+                    os.path.join(gtk_datadir, 'glib-2.0', 'schemas')])
+
+    print('Updating icon cache...')
+    update_icon_cache = os.path.join(gtk_bindir, 'gtk4-update-icon-cache')
+    subprocess.call([update_icon_cache, '-q', '-t' ,'-f',
+                    os.path.join(gtk_datadir, 'icons', 'hicolor')])
+
+    print('Updating module cache for print backends...')
     os.makedirs(gtk_printmodule_dir, exist_ok=True)
-    subprocess.call(['gio-querymodules', gtk_printmodule_dir])
-
-    print('Updating module cache for input methods...')
+    gio_querymodules = subprocess.check_output(['pkg-config',
+                                                '--variable=gio_querymodules',
+                                                'gio-2.0']).strip()
+    if not os.path.exists(gio_querymodules):
+        # pkg-config variables only available since GLib 2.62.0.
+        gio_querymodules = 'gio-querymodules'
+    subprocess.call([gio_querymodules, gtk_printmodule_dir])
+
+    print('Updating module cache for input methods...')
     os.makedirs(gtk_immodule_dir, exist_ok=True)
-    subprocess.call(['gio-querymodules', gtk_immodule_dir])
+    subprocess.call([gio_querymodules, gtk_immodule_dir])

config.h.meson

@@ -1,8 +1,9 @@
-/* config.h.in.  Generated from configure.ac by autoheader.  */
-
 /* always defined to indicate that i18n is enabled */
 #define ENABLE_NLS 1
 
+/* Use structured logging */
+#define G_LOG_STRUCTURED 1
+
 /* The prefix for our gettext translation domains. */
 #mesondefine GETTEXT_PACKAGE
 
@@ -27,14 +28,6 @@
 /* Define to 1 if you have the `dcgettext' function. */
 #mesondefine HAVE_DCGETTEXT
 
-/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
-   */
-#mesondefine HAVE_DECL_ISINF
-
-/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
-   */
-#mesondefine HAVE_DECL_ISNAN
-
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #mesondefine HAVE_DLFCN_H
 
@@ -77,12 +70,12 @@
 /* Define to 1 if you have the `mkstemp' function. */
 #mesondefine HAVE_MKSTEMP
 
+/* Define to 1 if you have the `mlock` function. */
+#mesondefine HAVE_MLOCK
+
 /* Define to 1 if you have a working `mmap' system call. */
 #mesondefine HAVE_MMAP
 
-/* Define to 1 if you have the `nearbyint' function. */
-#mesondefine HAVE_NEARBYINT
-
 /* Define to 1 if you have the `posix_fallocate' function. */
 #mesondefine HAVE_POSIX_FALLOCATE
 
@@ -92,21 +85,9 @@
 /* Have the Xrandr 1.5 extension library */
 #mesondefine HAVE_RANDR15
 
-/* Define to 1 if you have the `rint' function. */
-#mesondefine HAVE_RINT
-
-/* Define to 1 if you have the `round' function. */
-#mesondefine HAVE_ROUND
-
 /* Define to 1 if you have the `sincos' function. */
 #mesondefine HAVE_SINCOS
 
-/* Define to 1 if you have the `log2` function */
-#mesondefine HAVE_LOG2
-
-/* Define to 1 if you ahve the `exp2` function */
-#mesondefine HAVE_EXP2
-
 /* Define to 1 if you have the <stdint.h> header file. */
 #mesondefine HAVE_STDINT_H
 
@@ -126,7 +107,7 @@
 #mesondefine HAVE_SYS_PARAM_H
 
 /* Have the sysprof-capture library */
-#mesondefine HAVE_SYSPROF_CAPTURE
+#mesondefine HAVE_SYSPROF
 
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #mesondefine HAVE_SYS_STAT_H
@@ -295,3 +276,6 @@
 #mesondefine HAVE_PANGOFT
 
 #mesondefine ISO_CODES_PREFIX
+
+/* Define if tracker3 is available */
+#mesondefine HAVE_TRACKER3

demos/constraint-editor/constraint-editor-application.c

@@ -81,11 +81,11 @@ constraint_editor_application_activate (GApplication *app)
 static void
 constraint_editor_application_open (GApplication  *app,
                                     GFile        **files,
-                                    gint           n_files,
-                                    const gchar   *hint)
+                                    int            n_files,
+                                    const char    *hint)
 {
   ConstraintEditorWindow *win;
-  gint i;
+  int i;
 
   for (i = 0; i < n_files; i++)
     {

demos/constraint-editor/constraint-editor-window.c

@@ -36,7 +36,7 @@ struct _ConstraintEditorWindow
 G_DEFINE_TYPE(ConstraintEditorWindow, constraint_editor_window, GTK_TYPE_APPLICATION_WINDOW);
 
 static GtkConstraintTarget *
-find_target (GListModel *model,
+find_target (GListModel          *model,
              GtkConstraintTarget *orig)
 {
   const char *name;
@@ -163,20 +163,30 @@ constraint_editor_window_load (ConstraintEditorWindow *self,
       GtkConstraint *clone;
       GtkConstraintTarget *target;
       GtkConstraintTarget *source;
+      GtkConstraintAttribute source_attr;
 
       item = g_list_model_get_item (list, i);
       constraint = GTK_CONSTRAINT (item);
 
       target = gtk_constraint_get_target (constraint);
       source = gtk_constraint_get_source (constraint);
-      clone = gtk_constraint_new (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
+      source_attr = gtk_constraint_get_source_attribute (constraint);
+
+      if (source == NULL && source_attr == GTK_CONSTRAINT_ATTRIBUTE_NONE)
+        clone = gtk_constraint_new_constant (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
                                   gtk_constraint_get_target_attribute (constraint),
                                   gtk_constraint_get_relation (constraint),
-                                  find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), source),
-                                  gtk_constraint_get_target_attribute (constraint),
-                                  gtk_constraint_get_multiplier (constraint),
                                   gtk_constraint_get_constant (constraint),
                                   gtk_constraint_get_strength (constraint));
+      else
+        clone = gtk_constraint_new (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
+                                    gtk_constraint_get_target_attribute (constraint),
+                                    gtk_constraint_get_relation (constraint),
+                                    find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), source),
+                                    source_attr,
+                                    gtk_constraint_get_multiplier (constraint),
+                                    gtk_constraint_get_constant (constraint),
+                                    gtk_constraint_get_strength (constraint));
 
       constraint_view_add_constraint (CONSTRAINT_VIEW (self->view), clone);
 
@@ -193,7 +203,7 @@ constraint_editor_window_load (ConstraintEditorWindow *self,
 
 static void
 open_response_cb (GtkNativeDialog        *dialog,
-                  gint                    response,
+                  int                     response,
                   ConstraintEditorWindow *self)
 {
   gtk_native_dialog_hide (dialog);
@@ -221,9 +231,12 @@ open_cb (GtkWidget              *button,
                                         GTK_FILE_CHOOSER_ACTION_OPEN,
                                         "_Load",
                                         "_Cancel");
-
   gtk_native_dialog_set_modal (GTK_NATIVE_DIALOG (dialog), TRUE);
-  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), ".");
+
+  GFile *cwd = g_file_new_for_path (".");
+  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), cwd, NULL);
+  g_object_unref (cwd);
+
   g_signal_connect (dialog, "response", G_CALLBACK (open_response_cb), self);
   gtk_native_dialog_show (GTK_NATIVE_DIALOG (dialog));
 }
@@ -282,7 +295,7 @@ serialize_model (GListModel *list)
 
 static void
 save_response_cb (GtkNativeDialog        *dialog,
-                  gint                    response,
+                  int                     response,
                   ConstraintEditorWindow *self)
 {
   gtk_native_dialog_hide (dialog);
@@ -290,29 +303,37 @@ save_response_cb (GtkNativeDialog        *dialog,
   if (response == GTK_RESPONSE_ACCEPT)
     {
       GListModel *model;
-      char *text, *filename;
+      GFile *file;
+      char *text;
       GError *error = NULL;
 
       model = constraint_view_get_model (CONSTRAINT_VIEW (self->view));
       text = serialize_model (model);
-
-      filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
-      if (!g_file_set_contents (filename, text, -1, &error))
+      file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (dialog));
+      g_file_replace_contents (file, text, strlen (text),
+                               NULL, FALSE,
+                               G_FILE_CREATE_NONE,
+                               NULL,
+                               NULL,
+                               &error);
+      if (error != NULL)
         {
-          GtkWidget *dialog;
+          GtkWidget *message_dialog;
 
-          dialog = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (self))),
-                                           GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,
-                                           GTK_MESSAGE_INFO,
-                                           GTK_BUTTONS_OK,
-                                           "Saving failed");
-          gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
+          message_dialog = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (self))),
+                                                   GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,
+                                                   GTK_MESSAGE_INFO,
+                                                   GTK_BUTTONS_OK,
+                                                   "Saving failed");
+          gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (message_dialog),
                                                     "%s", error->message);
-          g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL);
-          gtk_widget_show (dialog);
+          g_signal_connect (message_dialog, "response", G_CALLBACK (gtk_window_destroy), NULL);
+          gtk_widget_show (message_dialog);
           g_error_free (error);
         }
-      g_free (filename);
+
+      g_free (text);
+      g_object_unref (file);
     }
 
   gtk_native_dialog_destroy (dialog);
@@ -329,9 +350,12 @@ save_cb (GtkWidget              *button,
                                         GTK_FILE_CHOOSER_ACTION_SAVE,
                                         "_Save",
                                         "_Cancel");
-
   gtk_native_dialog_set_modal (GTK_NATIVE_DIALOG (dialog), TRUE);
-  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), ".");
+
+  GFile *cwd = g_file_new_for_path (".");
+  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), cwd, NULL);
+  g_object_unref (cwd);
+
   g_signal_connect (dialog, "response", G_CALLBACK (save_response_cb), self);
   gtk_native_dialog_show (GTK_NATIVE_DIALOG (dialog));
 }
@@ -389,7 +413,7 @@ constraint_editor_done (ConstraintEditor *editor,
 
   g_clear_object (&old_constraint);
 
-  gtk_widget_destroy (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW));
+  gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
 }
 
 static void
@@ -400,7 +424,7 @@ edit_constraint (ConstraintEditorWindow *win,
   ConstraintEditor *editor;
   GListModel *model;
 
-  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  window = gtk_window_new ();
   gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
   gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
   if (constraint)
@@ -412,7 +436,7 @@ edit_constraint (ConstraintEditorWindow *win,
 
   editor = constraint_editor_new (model, constraint);
 
-  gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (editor));
+  gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
 
   g_signal_connect (editor, "done", G_CALLBACK (constraint_editor_done), win);
 
@@ -430,7 +454,7 @@ guide_editor_done (GuideEditor            *editor,
                    GtkConstraintGuide     *guide,
                    ConstraintEditorWindow *win)
 {
-  gtk_widget_destroy (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW));
+  gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
 }
 
 static void
@@ -440,13 +464,13 @@ edit_guide (ConstraintEditorWindow *win,
   GtkWidget *window;
   GuideEditor *editor;
 
-  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  window = gtk_window_new ();
   gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
   gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
   gtk_window_set_title (GTK_WINDOW (window), "Edit Guide");
 
   editor = guide_editor_new (guide);
-  gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (editor));
+  gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
 
   g_signal_connect (editor, "done", G_CALLBACK (guide_editor_done), win);
   gtk_widget_show (window);
@@ -473,8 +497,6 @@ constraint_editor_window_class_init (ConstraintEditorWindowClass *class)
   GObjectClass *object_class = G_OBJECT_CLASS (class);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 
-  g_type_ensure (CONSTRAINT_VIEW_TYPE);
-
   object_class->finalize = constraint_editor_window_finalize;
 
   gtk_widget_class_set_template_from_resource (widget_class,
@@ -587,30 +609,33 @@ create_widget_func (gpointer item,
     g_object_bind_property (item, "name",
                             label, "label",
                             G_BINDING_DEFAULT);
-  g_object_set (label, "margin", 10, NULL);
+  gtk_widget_set_margin_start (label, 10);
+  gtk_widget_set_margin_end (label, 10);
+  gtk_widget_set_margin_top (label, 10);
+  gtk_widget_set_margin_bottom (label, 10);
   gtk_label_set_xalign (GTK_LABEL (label), 0.0);
   gtk_widget_set_hexpand (label, TRUE);
-  gtk_container_add (GTK_CONTAINER (row), box);
-  gtk_container_add (GTK_CONTAINER (box), label);
+  gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), box);
+  gtk_box_append (GTK_BOX (box), label);
 
   if (GTK_IS_CONSTRAINT (item) || GTK_IS_CONSTRAINT_GUIDE (item))
     {
       button = gtk_button_new_from_icon_name ("document-edit-symbolic");
-      gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
       g_signal_connect (button, "clicked", G_CALLBACK (row_edit), win);
       g_object_set_data (G_OBJECT (row), "edit", button);
-      gtk_container_add (GTK_CONTAINER (box), button);
+      gtk_box_append (GTK_BOX (box), button);
       button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
-      gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
       g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
-      gtk_container_add (GTK_CONTAINER (box), button);
+      gtk_box_append (GTK_BOX (box), button);
     }
   else if (GTK_IS_WIDGET (item))
     {
       button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
-      gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
       g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
-      gtk_container_add (GTK_CONTAINER (box), button);
+      gtk_box_append (GTK_BOX (box), button);
     }
 
   g_free (freeme);

demos/constraint-editor/constraint-editor-window.ui

@@ -1,16 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <template class="ConstraintEditorWindow" parent="GtkApplicationWindow">
-    <style>
-      <class name="devel"/>
-    </style>
     <property name="title" translatable="yes">GTK Constraint Editor</property>
     <property name="default-width">1024</property>
     <property name="default-height">768</property>
     <child type="titlebar">
       <object class="GtkHeaderBar" id="header">
-        <property name="title" translatable="yes">GTK Constraint Editor</property>
-        <property name="show-title-buttons">1</property>
         <child type="start">
           <object class="GtkButton">
             <property name="icon-name">document-open-symbolic</property>

demos/constraint-editor/constraint-editor.c

@@ -142,6 +142,9 @@ get_target (GListModel *model,
 {
   int i;
 
+  if (id == NULL)
+    return NULL;
+
   if (strcmp ("super", id) == 0)
     return NULL;
 
@@ -212,6 +215,22 @@ get_relation_nick (GtkConstraintRelation relation)
   return nick;
 }
 
+static const char *
+get_relation_display_name (GtkConstraintRelation relation)
+{
+  switch (relation)
+    {
+    case GTK_CONSTRAINT_RELATION_LE:
+      return "≤";
+    case GTK_CONSTRAINT_RELATION_EQ:
+      return "=";
+    case GTK_CONSTRAINT_RELATION_GE:
+      return "≥";
+    default:
+      return "?";
+    }
+}
+
 static GtkConstraintStrength
 get_strength (const char *id)
 {
@@ -331,6 +350,7 @@ source_attr_changed (ConstraintEditor *editor)
     {
       gtk_widget_set_sensitive (editor->source, TRUE);
       gtk_widget_set_sensitive (editor->multiplier, TRUE);
+      gtk_editable_set_text (GTK_EDITABLE (editor->multiplier), "1");
     }
 }
 
@@ -347,7 +367,7 @@ constraint_editor_constraint_to_string (GtkConstraint *constraint)
 
   name = get_target_name (gtk_constraint_get_target (constraint));
   attr = get_attr_nick (gtk_constraint_get_target_attribute (constraint));
-  relation = get_relation_nick (gtk_constraint_get_relation (constraint));
+  relation = get_relation_display_name (gtk_constraint_get_relation (constraint));
 
   if (name == NULL)
     name = "[ ]";
@@ -441,8 +461,12 @@ update_preview (ConstraintEditor *editor)
 static void
 update_button (ConstraintEditor *editor)
 {
-  if (gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target)) != NULL &&
-      gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source)) != NULL)
+  const char *target = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target));
+  const char *source = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source));
+  const char *source_attr = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source_attr));
+
+  if (target &&
+      (source || (source_attr && get_target_attr (source_attr) == GTK_CONSTRAINT_ATTRIBUTE_NONE)))
     gtk_widget_set_sensitive (editor->button, TRUE);
   else
     gtk_widget_set_sensitive (editor->button, FALSE);

demos/constraint-editor/constraint-editor.ui

@@ -3,15 +3,18 @@
   <template class="ConstraintEditor" parent="GtkWidget">
     <child>
       <object class="GtkGrid" id="grid">
-        <property name="margin">20</property>
+        <property name="margin-start">20</property>
+        <property name="margin-end">20</property>
+        <property name="margin-top">20</property>
+        <property name="margin-bottom">20</property>
         <property name="row-spacing">10</property>
         <property name="column-spacing">10</property>
         <child>
           <object class="GtkLabel">
             <property name="label">Target</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">1</property>
+              <property name="column">0</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -20,8 +23,8 @@
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <signal name="changed" handler="update_button" swapped="yes"/>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">1</property>
+              <property name="column">1</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -29,8 +32,8 @@
           <object class="GtkComboBoxText" id="target_attr">
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">1</property>
+              <property name="column">2</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -38,8 +41,8 @@
           <object class="GtkLabel">
             <property name="label">Relation</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">2</property>
+              <property name="column">0</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -47,8 +50,8 @@
           <object class="GtkComboBoxText" id="relation">
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">2</property>
+              <property name="column">1</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -56,8 +59,8 @@
           <object class="GtkLabel">
             <property name="label">Source</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">3</property>
+              <property name="column">0</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -66,8 +69,8 @@
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <signal name="changed" handler="update_button" swapped="yes"/>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">3</property>
+              <property name="column">1</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -75,9 +78,10 @@
           <object class="GtkComboBoxText" id="source_attr">
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <signal name="changed" handler="source_attr_changed" swapped="yes"/>
+            <signal name="changed" handler="update_button" swapped="yes"/>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">3</property>
+              <property name="column">2</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -85,8 +89,8 @@
           <object class="GtkLabel">
             <property name="label">Multiplier</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">4</property>
+              <property name="column">0</property>
+              <property name="row">4</property>
             </layout>
           </object>
         </child>
@@ -94,8 +98,8 @@
           <object class="GtkEntry" id="multiplier">
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">4</property>
+              <property name="column">1</property>
+              <property name="row">4</property>
             </layout>
           </object>
         </child>
@@ -103,8 +107,8 @@
           <object class="GtkLabel">
             <property name="label">Constant</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">5</property>
+              <property name="column">0</property>
+              <property name="row">5</property>
             </layout>
           </object>
         </child>
@@ -112,8 +116,8 @@
           <object class="GtkEntry" id="constant">
             <signal name="changed" handler="update_preview" swapped="yes"/>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">5</property>
+              <property name="column">1</property>
+              <property name="row">5</property>
             </layout>
           </object>
         </child>
@@ -121,16 +125,16 @@
           <object class="GtkLabel">
             <property name="label">Strength</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">6</property>
+              <property name="column">0</property>
+              <property name="row">6</property>
             </layout>
           </object>
         </child>
         <child>
           <object class="GtkComboBoxText" id="strength">
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">6</property>
+              <property name="column">1</property>
+              <property name="row">6</property>
             </layout>
           </object>
         </child>
@@ -138,8 +142,8 @@
           <object class="GtkLabel" id="preview">
             <property name="xalign">0</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">7</property>
+              <property name="column">1</property>
+              <property name="row">7</property>
               <property name="column-span">2</property>
             </layout>
             <attributes>
@@ -152,8 +156,8 @@
             <property name="label">Create</property>
             <signal name="clicked" handler="create_constraint"/>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">8</property>
+              <property name="column">2</property>
+              <property name="row">8</property>
             </layout>
           </object>
         </child>

demos/constraint-editor/constraint-view.c

@@ -77,7 +77,7 @@ update_weak_position (ConstraintView *self,
                                                 GTK_CONSTRAINT_RELATION_EQ,
                                                 x,
                                                 GTK_CONSTRAINT_STRENGTH_WEAK);
-      g_object_set_data (G_OBJECT (constraint), "internal", "yes");
+      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
       gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
                                             constraint);
       g_object_set_data (G_OBJECT (child), "x-constraint", constraint);
@@ -97,7 +97,7 @@ update_weak_position (ConstraintView *self,
                                                 GTK_CONSTRAINT_RELATION_EQ,
                                                 y,
                                                 GTK_CONSTRAINT_STRENGTH_WEAK);
-      g_object_set_data (G_OBJECT (constraint), "internal", "yes");
+      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
       gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
                                             constraint);
       g_object_set_data (G_OBJECT (child), "y-constraint", constraint);
@@ -169,28 +169,30 @@ constraint_view_init (ConstraintView *self)
   GListModel *guides;
   GListModel *children;
   GListModel *constraints;
+  GtkFilter *filter;
 
   manager = gtk_constraint_layout_new ();
   gtk_widget_set_layout_manager (GTK_WIDGET (self), manager);
 
-  all_children = gtk_widget_observe_children (GTK_WIDGET (self));
-  all_constraints = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (manager));
   guides = gtk_constraint_layout_observe_guides (GTK_CONSTRAINT_LAYOUT (manager));
-  constraints = (GListModel *)gtk_filter_list_model_new (all_constraints, omit_internal, NULL, NULL);
-  children = (GListModel *)gtk_filter_list_model_new (all_children, omit_internal, NULL, NULL);
+
+  all_constraints = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (manager));
+  filter = GTK_FILTER (gtk_custom_filter_new (omit_internal, NULL, NULL));
+  constraints = (GListModel *)gtk_filter_list_model_new (all_constraints, filter);
+
+  all_children = gtk_widget_observe_children (GTK_WIDGET (self));
+  filter = GTK_FILTER (gtk_custom_filter_new (omit_internal, NULL, NULL));
+  children = (GListModel *)gtk_filter_list_model_new (all_children, filter);
 
   list = g_list_store_new (G_TYPE_LIST_MODEL);
   g_list_store_append (list, children);
   g_list_store_append (list, guides);
   g_list_store_append (list, constraints);
-  self->model = G_LIST_MODEL (gtk_flatten_list_model_new (G_TYPE_OBJECT, G_LIST_MODEL (list)));
   g_object_unref (children);
   g_object_unref (guides);
   g_object_unref (constraints);
-  g_object_unref (all_children);
-  g_object_unref (all_constraints);
-  g_object_unref (list);
 
+  self->model = G_LIST_MODEL (gtk_flatten_list_model_new (G_LIST_MODEL (list)));
 
   controller = (GtkEventController *)gtk_gesture_drag_new ();
   g_signal_connect (controller, "drag-begin", G_CALLBACK (drag_begin), self);
@@ -214,9 +216,9 @@ constraint_view_add_child (ConstraintView *view,
 
   label = gtk_label_new (name);
   frame = gtk_frame_new (NULL);
-  gtk_style_context_add_class (gtk_widget_get_style_context (frame), "child");
+  gtk_widget_add_css_class (frame, "child");
   gtk_widget_set_name (frame, name);
-  gtk_container_add (GTK_CONTAINER (frame), label);
+  gtk_frame_set_child (GTK_FRAME (frame), label);
   gtk_widget_set_parent (frame, GTK_WIDGET (view));
 
   update_weak_position (view, frame, 100, 100);
@@ -257,9 +259,9 @@ constraint_view_add_guide (ConstraintView *view,
                           G_BINDING_DEFAULT);
 
   frame = gtk_frame_new (NULL);
-  gtk_style_context_add_class (gtk_widget_get_style_context (frame), "guide");
-  g_object_set_data (G_OBJECT (frame), "internal", "yes");
-  gtk_container_add (GTK_CONTAINER (frame), label);
+  gtk_widget_add_css_class (frame, "guide");
+  g_object_set_data (G_OBJECT (frame), "internal", (char *)"yes");
+  gtk_frame_set_child (GTK_FRAME (frame), label);
   gtk_widget_insert_after (frame, GTK_WIDGET (view), NULL);
 
   g_object_set_data (G_OBJECT (guide), "frame", frame);
@@ -276,7 +278,7 @@ constraint_view_add_guide (ConstraintView *view,
                                        names[i].attr,
                                        1.0, 0.0,
                                        GTK_CONSTRAINT_STRENGTH_REQUIRED);
-      g_object_set_data (G_OBJECT (constraint), "internal", "yes");
+      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
       gtk_constraint_layout_add_constraint (layout, constraint);
       g_object_set_data (G_OBJECT (guide), names[i].name, constraint);
     }

demos/constraint-editor/constraint-view.h

@@ -23,6 +23,7 @@
 
 #define CONSTRAINT_VIEW_TYPE (constraint_view_get_type ())
 
+G_MODULE_EXPORT
 G_DECLARE_FINAL_TYPE (ConstraintView, constraint_view, CONSTRAINT, VIEW, GtkWidget)
 
 ConstraintView * constraint_view_new (void);

demos/constraint-editor/guide-editor.c

@@ -78,7 +78,7 @@ get_strength (const char *id)
   return strength;
 }
 
-const char *
+static const char *
 get_strength_nick (GtkConstraintStrength strength)
 {
   GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
@@ -184,58 +184,6 @@ max_input (GtkSpinButton *spin_button,
   return FALSE;
 }
 
-static gboolean
-min_output (GtkSpinButton *spin_button)
-{
-  GtkAdjustment *adjustment;
-  double value;
-  GtkWidget *box, *text;
-
-  adjustment = gtk_spin_button_get_adjustment (spin_button);
-  value = gtk_adjustment_get_value (adjustment);
-
-  box = gtk_widget_get_first_child (GTK_WIDGET (spin_button));
-  text = gtk_widget_get_first_child (box);
-
-  if (value == 0.0)
-    {
-      gtk_editable_set_text (GTK_EDITABLE (spin_button), "");
-      gtk_text_set_placeholder_text (GTK_TEXT (text), "unset");
-      return TRUE;
-    }
-  else
-    {
-      gtk_text_set_placeholder_text (GTK_TEXT (text), "");
-      return FALSE;
-    }
-}
-
-static gboolean
-max_output (GtkSpinButton *spin_button)
-{
-  GtkAdjustment *adjustment;
-  double value;
-  GtkWidget *box, *text;
-
-  adjustment = gtk_spin_button_get_adjustment (spin_button);
-  value = gtk_adjustment_get_value (adjustment);
-
-  box = gtk_widget_get_first_child (GTK_WIDGET (spin_button));
-  text = gtk_widget_get_first_child (box);
-
-  if (value == (double)G_MAXINT)
-    {
-      gtk_editable_set_text (GTK_EDITABLE (spin_button), "");
-      gtk_text_set_placeholder_text (GTK_TEXT (text), "unset");
-      return TRUE;
-    }
-  else
-    {
-      gtk_text_set_placeholder_text (GTK_TEXT (text), "");
-      return FALSE;
-    }
-}
-
 static void
 guide_editor_constructed (GObject *object)
 {
@@ -244,16 +192,12 @@ guide_editor_constructed (GObject *object)
   guide_strength_combo (editor->strength);
 
   g_signal_connect (editor->min_width, "input", G_CALLBACK (min_input), NULL);
-  g_signal_connect (editor->min_width, "output", G_CALLBACK (min_output), NULL);
 
   g_signal_connect (editor->min_height, "input", G_CALLBACK (min_input), NULL);
-  g_signal_connect (editor->min_height, "output", G_CALLBACK (min_output), NULL);
 
   g_signal_connect (editor->max_width, "input", G_CALLBACK (max_input), NULL);
-  g_signal_connect (editor->max_width, "output", G_CALLBACK (max_output), NULL);
 
   g_signal_connect (editor->max_height, "input", G_CALLBACK (max_input), NULL);
-  g_signal_connect (editor->max_height, "output", G_CALLBACK (max_output), NULL);
 
   if (editor->guide)
     {

demos/constraint-editor/guide-editor.ui

@@ -45,15 +45,18 @@
   <template class="GuideEditor" parent="GtkWidget">
     <child>
       <object class="GtkGrid" id="grid">
-        <property name="margin">20</property>
+        <property name="margin-start">20</property>
+        <property name="margin-end">20</property>
+        <property name="margin-top">20</property>
+        <property name="margin-bottom">20</property>
         <property name="row-spacing">10</property>
         <property name="column-spacing">10</property>
         <child>
           <object class="GtkLabel">
             <property name="label">Name</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">0</property>
+              <property name="column">0</property>
+              <property name="row">0</property>
             </layout>
           </object>
         </child>
@@ -61,8 +64,8 @@
           <object class="GtkEntry" id="name">
             <property name="max-width-chars">20</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">0</property>
+              <property name="column">1</property>
+              <property name="row">0</property>
               <property name="column-span">2</property>
             </layout>
           </object>
@@ -71,8 +74,8 @@
           <object class="GtkLabel">
             <property name="label">Min Size</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">1</property>
+              <property name="column">0</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -81,8 +84,8 @@
             <property name="adjustment">min_width_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">1</property>
+              <property name="column">1</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -91,8 +94,8 @@
             <property name="adjustment">min_height_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">1</property>
+              <property name="column">2</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -100,8 +103,8 @@
           <object class="GtkLabel">
             <property name="label">Nat Size</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">2</property>
+              <property name="column">0</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -110,8 +113,8 @@
             <property name="adjustment">nat_width_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">2</property>
+              <property name="column">1</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -120,8 +123,8 @@
             <property name="adjustment">nat_height_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">2</property>
+              <property name="column">2</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -129,8 +132,8 @@
           <object class="GtkLabel">
             <property name="label">Max Size</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">3</property>
+              <property name="column">0</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -139,8 +142,8 @@
             <property name="adjustment">max_width_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">3</property>
+              <property name="column">1</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -149,8 +152,8 @@
             <property name="adjustment">max_height_adj</property>
             <property name="max-width-chars">5</property>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">3</property>
+              <property name="column">2</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>
@@ -158,16 +161,16 @@
           <object class="GtkLabel">
             <property name="label">Strength</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">4</property>
+              <property name="column">0</property>
+              <property name="row">4</property>
             </layout>
           </object>
         </child>
         <child>
           <object class="GtkComboBoxText" id="strength">
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">4</property>
+              <property name="column">1</property>
+              <property name="row">4</property>
               <property name="column-span">2</property>
             </layout>
           </object>
@@ -177,8 +180,8 @@
             <property name="label">Create</property>
             <signal name="clicked" handler="create_guide"/>
             <layout>
-              <property name="left-attach">2</property>
-              <property name="top-attach">5</property>
+              <property name="column">2</property>
+              <property name="row">5</property>
             </layout>
           </object>
         </child>

demos/constraint-editor/meson.build

@@ -8,13 +8,16 @@ constraint_editor_sources = [
 ]
 
 constraint_editor_resources = gnome.compile_resources('constraint_editor_resources',
-                                                      'constraint-editor.gresource.xml',
-                                                      source_dir: '.')
+  'constraint-editor.gresource.xml',
+  source_dir: '.',
+)
 
 executable('gtk4-constraint-editor',
-           constraint_editor_sources, constraint_editor_resources,
-           dependencies: libgtk_dep,
-           include_directories: confinc,
-           gui_app: true,
-           link_args: extra_demo_ldflags,
-           install: false)
+  sources: [ constraint_editor_sources, constraint_editor_resources, ],
+  c_args: common_cflags,
+  dependencies: libgtk_dep,
+  include_directories: confinc,
+  gui_app: true,
+  link_args: extra_demo_ldflags,
+  install: false,
+)

demos/gtk-demo/alienplanet.glsl

@@ -0,0 +1,345 @@
+// Originally from: https://www.shadertoy.com/view/wsjBD3
+// License CC0: A battered alien planet
+//  Been experimenting with space inspired shaders
+
+#define PI  3.141592654
+#define TAU (2.0*PI)
+
+#define TOLERANCE       0.00001
+#define MAX_ITER        65
+#define MIN_DISTANCE    0.01
+#define MAX_DISTANCE    9.0
+
+const vec3  skyCol1       = vec3(0.35, 0.45, 0.6);
+const vec3  skyCol2       = vec3(0.4, 0.7, 1.0);
+const vec3  skyCol3       = pow(skyCol1, vec3(0.25));
+const vec3  sunCol1       = vec3(1.0,0.6,0.4);
+const vec3  sunCol2       = vec3(1.0,0.9,0.7);
+const vec3  smallSunCol1  = vec3(1.0,0.5,0.25)*0.5;
+const vec3  smallSunCol2  = vec3(1.0,0.5,0.25)*0.5;
+const vec3  mountainColor = 1.0*sqrt(vec3(0.95, 0.65, 0.45));
+const float cellWidth     = 1.0;
+const vec4  planet        = vec4(80.0, -20.0, 100.0, 50.0)*1000.0;
+
+void rot(inout vec2 p, float a) {
+  float c = cos(a);
+  float s = sin(a);
+  p = vec2(p.x*c + p.y*s, -p.x*s + p.y*c);
+}
+
+vec2 mod2(inout vec2 p, vec2 size) {
+  vec2 c = floor((p + size*0.5)/size);
+  p = mod(p + size*0.5,size) - size*0.5;
+  return c;
+}
+
+float circle(vec2 p, float r) {
+  return length(p) - r;
+}
+
+float egg(vec2 p, float ra, float rb) {
+  const float k = sqrt(3.0);
+  p.x = abs(p.x);
+  float r = ra - rb;
+  return ((p.y<0.0)       ? length(vec2(p.x,  p.y    )) - r :
+          (k*(p.x+r)<p.y) ? length(vec2(p.x,  p.y-k*r)) :
+                              length(vec2(p.x+r,p.y    )) - 2.0*r) - rb;
+}
+
+vec2 hash(vec2 p) {
+  p = vec2(dot (p, vec2 (127.1, 311.7)), dot (p, vec2 (269.5, 183.3)));
+  return -1. + 2.*fract (sin (p)*43758.5453123);
+}
+
+vec2 raySphere(vec3 ro, vec3 rd, vec4 sphere) {
+  vec3 center = sphere.xyz;
+  float radius = sphere.w;
+  vec3 m = ro - center.xyz;
+  float b = dot(m, rd);
+  float c = dot(m, m) - radius*radius;
+  if(c > 0.0 && b > 0.0) return vec2(-1.0, -1.0);
+  float discr = b * b - c;
+  if(discr < 0.0) return vec2(-1.0);
+  float normalMultiplier = 1.0;
+  float s = sqrt(discr);
+  float t0 = -b - s;
+  float t1 = -b + s;;
+  return vec2(t0, t1);
+}
+
+float noize1(vec2 p) {
+  vec2 n = mod2(p, vec2(cellWidth));
+  vec2 hh = hash(sqrt(2.0)*(n+1000.0));
+  hh.x *= hh.y;
+
+  float r = 0.225*cellWidth;
+
+  float d = circle(p, 2.0*r);
+
+  float h = hh.x*smoothstep(0.0, r, -d);
+
+  return h*0.25;
+}
+
+float noize2(vec2 p) {
+  vec2 n = mod2(p, vec2(cellWidth));
+  vec2 hh = hash(sqrt(2.0)*(n+1000.0));
+  hh.x *= hh.y;
+
+  rot(p, TAU*hh.y);
+  float r = 0.45*cellWidth;
+
+//  float d = circle(p, 1.0*r);
+  float d = egg(p, 0.75*r, 0.5*r*abs(hh.y));
+
+  float h = (hh.x)*smoothstep(0.0, r, -2.0*d);
+
+  return h*0.275;
+}
+
+
+float height(vec2 p, float dd, int mx) {
+  const float aa   = 0.45;
+  const float ff   = 2.03;
+  const float tt   = 1.2;
+  const float oo   = 3.93;
+  const float near = 0.25;
+  const float far  = 0.65;
+
+  float a = 1.0;
+  float o = 0.2;
+  float s = 0.0;
+  float d = 0.0;
+
+  int i = 0;
+
+  for (; i < 4;++i) {
+    float nn = a*noize2(p);
+    s += nn;
+    d += abs(a);
+    p += o;
+    a *= aa;
+    p *= ff;
+    o *= oo;
+    rot(p, tt);
+  }
+
+  float lod = s/d;
+
+  float rdd = dd/MAX_DISTANCE;
+  mx = int(mix(float(4), float(mx), step(rdd, far)));
+
+  for (; i < mx; ++i) {
+    float nn = a*noize1(p);
+    s += nn;
+    d += abs(a);
+    p += o;
+    a *= aa;
+    p *= ff;
+    o *= oo;
+    rot(p, tt);
+  }
+
+  float hid = (s/d);
+
+  return mix(hid, lod, smoothstep(near, far, rdd));
+}
+
+float loheight(vec2 p, float d) {
+  return height(p, d, 0);
+}
+
+float height(vec2 p, float d) {
+  return height(p, d, 6);
+}
+
+float hiheight(vec2 p, float d) {
+  return height(p, d, 8);
+}
+
+vec3 normal(vec2 p, float d) {
+  vec2 eps = vec2(0.00125, 0.0);
+
+  vec3 n;
+
+  n.x = (hiheight(p - eps.xy, d) - hiheight(p + eps.xy, d));
+  n.y = 2.0*eps.x;
+  n.z = (hiheight(p - eps.yx, d) - hiheight(p + eps.yx, d));
+
+  return normalize(n);
+}
+
+const float stepLength[] = float[](0.9, 0.25);
+
+
+float march(vec3 ro, vec3 rd, out int max_iter) {
+  float dt = 0.1;
+  float d = MIN_DISTANCE;
+  int currentStep = 0;
+  float lastd = d;
+  for (int i = 0; i < MAX_ITER; ++i)
+  {
+    vec3 p = ro + d*rd;
+    float h = height(p.xz, d);
+
+    if (d > MAX_DISTANCE) {
+      max_iter = i;
+      return MAX_DISTANCE;
+    }
+
+    float hd = p.y - h;
+
+    if (hd < TOLERANCE) {
+      ++currentStep;
+      if (currentStep >= stepLength.length()) {
+        max_iter = i;
+        return d;
+      }
+
+      d = lastd;
+      continue;
+    }
+
+    float sl = stepLength[currentStep];
+
+    dt = max(hd, TOLERANCE)*sl + 0.0025*d;
+    lastd = d;
+    d += dt;
+  }
+
+  max_iter = MAX_ITER;
+  return MAX_DISTANCE;
+}
+
+vec3 sunDirection() {
+  return normalize(vec3(-0.5, 0.085, 1.0));
+}
+
+vec3 smallSunDirection() {
+  return normalize(vec3(-0.2, -0.05, 1.0));
+}
+
+float psin(float f) {
+  return 0.5 + 0.5*sin(f);
+}
+
+vec3 skyColor(vec3 ro, vec3 rd) {
+  vec3 sunDir = sunDirection();
+  vec3 smallSunDir = smallSunDirection();
+
+  float sunDot = max(dot(rd, sunDir), 0.0);
+  float smallSunDot = max(dot(rd, smallSunDir), 0.0);
+
+  float angle = atan(rd.y, length(rd.xz))*2.0/PI;
+
+  vec3 skyCol = mix(mix(skyCol1, skyCol2, max(0.0, angle)), skyCol3, clamp(-angle*2.0, 0.0, 1.0));
+
+  vec3 sunCol = 0.5*sunCol1*pow(sunDot, 20.0) + 8.0*sunCol2*pow(sunDot, 2000.0);
+  vec3 smallSunCol = 0.5*smallSunCol1*pow(smallSunDot, 200.0) + 8.0*smallSunCol2*pow(smallSunDot, 20000.0);
+
+  vec3 dust = pow(sunCol2*mountainColor, vec3(1.75))*smoothstep(0.05, -0.1, rd.y)*0.5;
+
+  vec2 si = raySphere(ro, rd, planet);
+
+  vec3 planetSurface = ro + si.x*rd;
+  vec3 planetNormal = normalize(planetSurface - planet.xyz);
+  float planetDiff = max(dot(planetNormal, sunDir), 0.0);
+  float planetBorder = max(dot(planetNormal, -rd), 0.0);
+  float planetLat = (planetSurface.x+planetSurface.y)*0.0005;
+  vec3 planetCol = mix(1.3*vec3(0.9, 0.8, 0.7), 0.3*vec3(0.9, 0.8, 0.7), pow(psin(planetLat+1.0)*psin(sqrt(2.0)*planetLat+2.0)*psin(sqrt(3.5)*planetLat+3.0), 0.5));
+
+  vec3 final = vec3(0.0);
+
+  final += step(0.0, si.x)*pow(planetDiff, 0.75)*planetCol*smoothstep(-0.075, 0.0, rd.y)*smoothstep(0.0, 0.1, planetBorder);
+
+  final += skyCol + sunCol + smallSunCol + dust;
+
+  return final;
+}
+
+vec3 getColor(vec3 ro, vec3 rd) {
+  int max_iter = 0;
+  vec3 skyCol = skyColor(ro, rd);
+  vec3 col = vec3(0);
+
+  float d = march(ro, rd, max_iter);
+
+  if (d < MAX_DISTANCE)   {
+    vec3 sunDir = sunDirection();
+    vec3 osunDir = sunDir*vec3(-1.0, .0, -1.0);
+    vec3 p = ro + d*rd;
+
+    vec3 normal = normal(p.xz, d);
+
+    float amb = 0.2;
+
+    float dif1 = max(0.0, dot(sunDir, normal));
+    vec3 shd1 = sunCol2*mix(amb, 1.0, pow(dif1, 0.75));
+
+    float dif2 = max(0.0, dot(osunDir, normal));
+    vec3 shd2 = sunCol1*mix(amb, 1.0, pow(dif2, 0.75));
+
+    vec3 ref = reflect(rd, normal);
+    vec3 rcol = skyColor(p, ref);
+
+    col = mountainColor*amb*skyCol3;
+    col += mix(shd1, shd2, -0.5)*mountainColor;
+    float fre = max(dot(normal, -rd), 0.0);
+    fre = pow(1.0 - fre, 5.0);
+    col += rcol*fre*0.5;
+    col += (1.0*p.y);
+    col = tanh(col);
+    col = mix(col, skyCol, smoothstep(0.5*MAX_DISTANCE, 1.0*MAX_DISTANCE, d));
+
+  } else {
+    col = skyCol;
+  }
+
+//  col += vec3(1.1, 0.0, 0.0)* smoothstep(0.25, 1.0,(float(max_iter)/float(MAX_ITER)));
+  return col;
+}
+
+vec3 getSample1(vec2 p, float time) {
+  float off = 0.5*iTime;
+
+  vec3 ro  = vec3(0.5, 1.0-0.25, -2.0 + off);
+  vec3 la  = ro + vec3(0.0, -0.30,  2.0);
+
+  vec3 ww = normalize(la - ro);
+  vec3 uu = normalize(cross(vec3(0.0,1.0,0.0), ww));
+  vec3 vv = normalize(cross(ww, uu));
+  vec3 rd = normalize(p.x*uu + p.y*vv + 2.0*ww);
+
+  vec3 col = getColor(ro, rd)  ;
+
+  return col;
+}
+
+vec3 getSample2(vec2 p, float time) {
+  p.y-=time*0.25;
+  float h = height(p, 0.0);
+  vec3 n = normal(p, 0.0);
+
+  vec3 lp = vec3(10.0, -1.2, 0.0);
+
+  vec3 ld = normalize(vec3(p.x, h, p.y)- lp);
+
+  float d = max(dot(ld, n), 0.0);
+
+  vec3 col = vec3(0.0);
+
+  col = vec3(1.0)*(h+0.1);
+  col += vec3(1.5)*pow(d, 0.75);
+
+  return col;
+}
+
+void mainImage(out vec4 fragColor, vec2 fragCoord) {
+  vec2 q = fragCoord.xy/iResolution.xy;
+  vec2 p = -1.0 + 2.0*q;
+  p.x *= iResolution.x/iResolution.y;
+
+  vec3 col = getSample1(p, iTime);
+
+  fragColor = vec4(col, 1.0);
+}

demos/gtk-demo/application.c

@@ -1,4 +1,3 @@
-
 #include "config.h"
 
 #include <gtk/gtk.h>
@@ -6,6 +5,7 @@
 typedef GtkApplication DemoApplication;
 typedef GtkApplicationClass DemoApplicationClass;
 
+static GType demo_application_get_type (void);
 G_DEFINE_TYPE (DemoApplication, demo_application, GTK_TYPE_APPLICATION)
 
 typedef struct {
@@ -14,7 +14,7 @@ typedef struct {
   GtkWidget *message;
   GtkWidget *infobar;
   GtkWidget *status;
-  GtkWidget *menutool;
+  GtkWidget *menubutton;
   GMenuModel *toolmenu;
   GtkTextBuffer *buffer;
 
@@ -25,6 +25,7 @@ typedef struct {
 } DemoApplicationWindow;
 typedef GtkApplicationWindowClass DemoApplicationWindowClass;
 
+static GType demo_application_window_get_type (void);
 G_DEFINE_TYPE (DemoApplicationWindow, demo_application_window, GTK_TYPE_APPLICATION_WINDOW)
 
 static void create_window (GApplication *app, const char *contents);
@@ -32,7 +33,7 @@ static void create_window (GApplication *app, const char *contents);
 static void
 show_action_dialog (GSimpleAction *action)
 {
-  const gchar *name;
+  const char *name;
   GtkWidget *dialog;
 
   name = g_action_get_name (G_ACTION (action));
@@ -45,7 +46,7 @@ show_action_dialog (GSimpleAction *action)
                                     name);
 
   g_signal_connect (dialog, "response",
-                    G_CALLBACK (gtk_widget_destroy), NULL);
+                    G_CALLBACK (gtk_window_destroy), NULL);
 
   gtk_widget_show (dialog);
 }
@@ -56,9 +57,9 @@ show_action_infobar (GSimpleAction *action,
                      gpointer       data)
 {
   DemoApplicationWindow *window = data;
-  gchar *text;
-  const gchar *name;
-  const gchar *value;
+  char *text;
+  const char *name;
+  const char *value;
 
   name = g_action_get_name (G_ACTION (action));
   value = g_variant_get_string (parameter, NULL);
@@ -90,7 +91,7 @@ activate_new (GSimpleAction *action,
 
 static void
 open_response_cb (GtkNativeDialog *dialog,
-                  gint             response_id,
+                  int              response_id,
                   gpointer         user_data)
 {
   GtkFileChooserNative *native = user_data;
@@ -118,7 +119,7 @@ open_response_cb (GtkNativeDialog *dialog,
                                                    "Error loading file: \"%s\"",
                                                    error->message);
           g_signal_connect (message_dialog, "response",
-                            G_CALLBACK (gtk_widget_destroy), NULL);
+                            G_CALLBACK (gtk_window_destroy), NULL);
           gtk_widget_show (message_dialog);
           g_error_free (error);
         }
@@ -183,7 +184,7 @@ activate_about (GSimpleAction *action,
 {
   GtkWidget *window = user_data;
 
-  const gchar *authors[] = {
+  const char *authors[] = {
     "Peter Mattis",
     "Spencer Kimball",
     "Josh MacDonald",
@@ -191,7 +192,7 @@ activate_about (GSimpleAction *action,
     NULL
   };
 
-  const gchar *documentors[] = {
+  const char *documentors[] = {
     "Owen Taylor",
     "Tony Gale",
     "Matthias Clasen <mclasen@redhat.com>",
@@ -232,7 +233,7 @@ activate_quit (GSimpleAction *action,
       win = list->data;
       next = list->next;
 
-      gtk_widget_destroy (GTK_WIDGET (win));
+      gtk_window_destroy (GTK_WINDOW (win));
 
       list = next;
     }
@@ -242,9 +243,9 @@ static void
 update_statusbar (GtkTextBuffer         *buffer,
                   DemoApplicationWindow *window)
 {
-  gchar *msg;
-  gint row, col;
-  gint count;
+  char *msg;
+  int row, col;
+  int count;
   GtkTextIter iter;
 
   /* clear any previous message, underflow is allowed */
@@ -326,19 +327,14 @@ static void
 startup (GApplication *app)
 {
   GtkBuilder *builder;
-  GMenuModel *appmenu;
-  GMenuModel *menubar;
 
   G_APPLICATION_CLASS (demo_application_parent_class)->startup (app);
 
   builder = gtk_builder_new ();
   gtk_builder_add_from_resource (builder, "/application_demo/menus.ui", NULL);
 
-  appmenu = (GMenuModel *)gtk_builder_get_object (builder, "appmenu");
-  menubar = (GMenuModel *)gtk_builder_get_object (builder, "menubar");
-
-  gtk_application_set_app_menu (GTK_APPLICATION (app), appmenu);
-  gtk_application_set_menubar (GTK_APPLICATION (app), menubar);
+  gtk_application_set_menubar (GTK_APPLICATION (app),
+                               G_MENU_MODEL (gtk_builder_get_object (builder, "menubar")));
 
   g_object_unref (builder);
 }
@@ -351,6 +347,7 @@ create_window (GApplication *app,
 
   window = (DemoApplicationWindow *)g_object_new (demo_application_window_get_type (),
                                                   "application", app,
+                                                  "show-menubar", TRUE,
                                                   NULL);
   if (content)
     gtk_text_buffer_set_text (window->buffer, content, -1);
@@ -428,8 +425,8 @@ demo_application_window_init (DemoApplicationWindow *window)
 
   gtk_widget_init_template (GTK_WIDGET (window));
 
-  popover = gtk_popover_menu_new_from_model (window->menutool, window->toolmenu);
-  gtk_menu_tool_button_set_popover (GTK_MENU_TOOL_BUTTON (window->menutool), popover);
+  popover = gtk_popover_menu_new_from_model (window->toolmenu);
+  gtk_menu_button_set_popover (GTK_MENU_BUTTON (window->menubutton), popover);
 
   g_action_map_add_action_entries (G_ACTION_MAP (window),
                                    win_entries, G_N_ELEMENTS (win_entries),
@@ -468,18 +465,18 @@ demo_application_window_size_allocate (GtkWidget *widget,
                                                                           baseline);
 
   if (!window->maximized && !window->fullscreen)
-    gtk_window_get_size (GTK_WINDOW (window), &window->width, &window->height);
+    gtk_window_get_default_size (GTK_WINDOW (window), &window->width, &window->height);
 }
 
 static void
 surface_state_changed (GtkWidget *widget)
 {
   DemoApplicationWindow *window = (DemoApplicationWindow *)widget;
-  GdkSurfaceState new_state;
+  GdkToplevelState new_state;
 
-  new_state = gdk_surface_get_state (gtk_native_get_surface (GTK_NATIVE (widget)));
-  window->maximized = (new_state & GDK_SURFACE_STATE_MAXIMIZED) != 0;
-  window->fullscreen = (new_state & GDK_SURFACE_STATE_FULLSCREEN) != 0;
+  new_state = gdk_toplevel_get_state (GDK_TOPLEVEL (gtk_native_get_surface (GTK_NATIVE (widget))));
+  window->maximized = (new_state & GDK_TOPLEVEL_STATE_MAXIMIZED) != 0;
+  window->fullscreen = (new_state & GDK_TOPLEVEL_STATE_FULLSCREEN) != 0;
 }
 
 static void
@@ -501,13 +498,13 @@ demo_application_window_unrealize (GtkWidget *widget)
 }
 
 static void
-demo_application_window_destroy (GtkWidget *widget)
+demo_application_window_dispose (GObject *object)
 {
-  DemoApplicationWindow *window = (DemoApplicationWindow *)widget;
+  DemoApplicationWindow *window = (DemoApplicationWindow *)object;
 
   demo_application_window_store_state (window);
 
-  GTK_WIDGET_CLASS (demo_application_window_parent_class)->destroy (widget);
+  G_OBJECT_CLASS (demo_application_window_parent_class)->dispose (object);
 }
 
 static void
@@ -517,18 +514,18 @@ demo_application_window_class_init (DemoApplicationWindowClass *class)
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 
   object_class->constructed = demo_application_window_constructed;
+  object_class->dispose = demo_application_window_dispose;
 
   widget_class->size_allocate = demo_application_window_size_allocate;
   widget_class->realize = demo_application_window_realize;
   widget_class->unrealize = demo_application_window_unrealize;
-  widget_class->destroy = demo_application_window_destroy;
 
   gtk_widget_class_set_template_from_resource (widget_class, "/application_demo/application.ui");
   gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, message);
   gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, infobar);
   gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, status);
   gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, buffer);
-  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, menutool);
+  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, menubutton);
   gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, toolmenu);
   gtk_widget_class_bind_template_callback (widget_class, clicked_cb);
   gtk_widget_class_bind_template_callback (widget_class, update_statusbar);

demos/gtk-demo/application.ui

@@ -8,34 +8,31 @@
     <child>
       <object class="GtkGrid">
         <child>
-          <object class="GtkToolbar">
+          <object class="GtkBox">
             <property name="hexpand">1</property>
-            <style>
-              <class name="primary-toolbar"/>
-            </style>
             <child>
-              <object class="GtkMenuToolButton" id="menutool">
+              <object class="GtkMenuButton" id="menubutton">
                 <property name="icon-name">document-open</property>
               </object>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="icon-name">application-exit</property>
                 <property name="action-name">app.quit</property>
               </object>
             </child>
             <child>
-              <object class="GtkSeparatorToolItem"/>
+              <object class="GtkSeparator"/>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="icon-name">applications-other</property>
                 <property name="action-name">win.logo</property>
               </object>
             </child>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">0</property>
+              <property name="column">0</property>
+              <property name="row">0</property>
             </layout>
           </object>
         </child>
@@ -57,14 +54,14 @@
               </object>
             </child>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">1</property>
+              <property name="column">0</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
         <child>
           <object class="GtkScrolledWindow">
-            <property name="shadow-type">in</property>
+            <property name="has-frame">1</property>
             <child>
               <object class="GtkTextView">
                 <property name="hexpand">1</property>
@@ -73,8 +70,8 @@
               </object>
             </child>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">2</property>
+              <property name="column">0</property>
+              <property name="row">2</property>
             </layout>
           </object>
         </child>
@@ -82,8 +79,8 @@
           <object class="GtkStatusbar" id="status">
             <property name="hexpand">1</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">3</property>
+              <property name="column">0</property>
+              <property name="row">3</property>
             </layout>
           </object>
         </child>

demos/gtk-demo/application_demo.c

@@ -16,8 +16,8 @@ static GtkWidget *placeholder;
 
 static void
 on_name_appeared (GDBusConnection *connection,
-                  const gchar     *name,
-                  const gchar     *name_owner,
+                  const char      *name,
+                  const char      *name_owner,
                   gpointer         user_data)
 {
   name_seen = TRUE;
@@ -25,18 +25,13 @@ on_name_appeared (GDBusConnection *connection,
 
 static void
 on_name_vanished (GDBusConnection *connection,
-                  const gchar     *name,
+                  const char      *name,
                   gpointer         user_data)
 {
   if (!name_seen)
     return;
 
-  if (placeholder)
-    {
-      gtk_widget_destroy (placeholder);
-      g_object_unref (placeholder);
-      placeholder = NULL;
-    }
+  g_clear_object (&placeholder);
 }
 
 #ifdef G_OS_WIN32
@@ -60,7 +55,7 @@ do_application_demo (GtkWidget *toplevel)
 
   if (placeholder == NULL)
     {
-      const gchar *command;
+      const char *command;
       GError *error = NULL;
 
       if (g_file_test ("./gtk4-demo-application" APP_EXTENSION, G_FILE_TEST_IS_EXECUTABLE))

demos/gtk-demo/appmenu.ui

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <menu id="appmenu">
-    <section>
-      <item>
-        <attribute name="label" translatable="yes">About</attribute>
-        <attribute name="action">app.about</attribute>
-      </item>
-    </section>
-    <section>
-      <item>
-        <attribute name="label" translatable="yes">_Quit</attribute>
-        <attribute name="action">app.quit</attribute>
-        <attribute name="accel">&lt;Primary&gt;q</attribute>
-      </item>
-    </section>
-  </menu>
-</interface>

demos/gtk-demo/assistant.c

@@ -1,19 +1,18 @@
 /* Assistant
  *
- * Demonstrates a sample multi-step assistant. Assistants are used to divide
- * an operation into several simpler sequential steps, and to guide the user
- * through these steps.
+ * Demonstrates a sample multi-step assistant with GtkAssistant. Assistants
+ * are used to divide an operation into several simpler sequential steps,
+ * and to guide the user through these steps.
  */
 
 #include <gtk/gtk.h>
 
-static GtkWidget *assistant = NULL;
 static GtkWidget *progress_bar = NULL;
 
 static gboolean
 apply_changes_gradually (gpointer data)
 {
-  gdouble fraction;
+  double fraction;
 
   /* Work, work, work... */
   fraction = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR (progress_bar));
@@ -27,8 +26,7 @@ apply_changes_gradually (gpointer data)
   else
     {
       /* Close automatically once changes are fully applied. */
-      gtk_widget_destroy (assistant);
-      assistant = NULL;
+      gtk_window_destroy (GTK_WINDOW (data));
       return G_SOURCE_REMOVE;
     }
 }
@@ -37,23 +35,20 @@ static void
 on_assistant_apply (GtkWidget *widget, gpointer data)
 {
   /* Start a timer to simulate changes taking a few seconds to apply. */
-  g_timeout_add (100, apply_changes_gradually, NULL);
+  g_timeout_add (100, apply_changes_gradually, widget);
 }
 
 static void
 on_assistant_close_cancel (GtkWidget *widget, gpointer data)
 {
-  GtkWidget **assistant = (GtkWidget **) data;
-
-  gtk_widget_destroy (*assistant);
-  *assistant = NULL;
+  gtk_window_destroy (GTK_WINDOW (widget));
 }
 
 static void
 on_assistant_prepare (GtkWidget *widget, GtkWidget *page, gpointer data)
 {
-  gint current_page, n_pages;
-  gchar *title;
+  int current_page, n_pages;
+  char *title;
 
   current_page = gtk_assistant_get_current_page (GTK_ASSISTANT (widget));
   n_pages = gtk_assistant_get_n_pages (GTK_ASSISTANT (widget));
@@ -75,8 +70,8 @@ on_entry_changed (GtkWidget *widget, gpointer data)
 {
   GtkAssistant *assistant = GTK_ASSISTANT (data);
   GtkWidget *current_page;
-  gint page_number;
-  const gchar *text;
+  int page_number;
+  const char *text;
 
   page_number = gtk_assistant_get_current_page (assistant);
   current_page = gtk_assistant_get_nth_page (assistant, page_number);
@@ -94,15 +89,21 @@ create_page1 (GtkWidget *assistant)
   GtkWidget *box, *label, *entry;
 
   box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
-  g_object_set (box, "margin", 12, NULL);
+  gtk_widget_set_margin_start (box, 12);
+  gtk_widget_set_margin_end (box, 12);
+  gtk_widget_set_margin_top (box, 12);
+  gtk_widget_set_margin_bottom (box, 12);
 
   label = gtk_label_new ("You must fill out this entry to continue:");
-  gtk_container_add (GTK_CONTAINER (box), label);
+  gtk_box_append (GTK_BOX (box), label);
 
   entry = gtk_entry_new ();
+  gtk_accessible_update_relation (GTK_ACCESSIBLE (entry),
+                                  GTK_ACCESSIBLE_RELATION_LABELLED_BY, label, NULL,
+                                  -1);
   gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
   gtk_widget_set_valign (entry, GTK_ALIGN_CENTER);
-  gtk_container_add (GTK_CONTAINER (box), entry);
+  gtk_box_append (GTK_BOX (box), entry);
   g_signal_connect (G_OBJECT (entry), "changed",
                     G_CALLBACK (on_entry_changed), assistant);
 
@@ -117,12 +118,15 @@ create_page2 (GtkWidget *assistant)
   GtkWidget *box, *checkbutton;
 
   box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
-  g_object_set (box, "margin", 12, NULL);
+  gtk_widget_set_margin_start (box, 12);
+  gtk_widget_set_margin_end (box, 12);
+  gtk_widget_set_margin_top (box, 12);
+  gtk_widget_set_margin_bottom (box, 12);
 
   checkbutton = gtk_check_button_new_with_label ("This is optional data, you may continue "
                                                  "even if you do not check this");
   gtk_widget_set_valign (checkbutton, GTK_ALIGN_CENTER);
-  gtk_container_add (GTK_CONTAINER (box), checkbutton);
+  gtk_box_append (GTK_BOX (box), checkbutton);
 
   gtk_assistant_append_page (GTK_ASSISTANT (assistant), box);
   gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), box, TRUE);
@@ -167,6 +171,8 @@ create_page4 (GtkWidget *assistant)
 GtkWidget*
 do_assistant (GtkWidget *do_widget)
 {
+  static GtkWidget *assistant;
+
   if (!assistant)
     {
       assistant = gtk_assistant_new ();
@@ -175,6 +181,7 @@ do_assistant (GtkWidget *do_widget)
 
       gtk_window_set_display (GTK_WINDOW (assistant),
                               gtk_widget_get_display (do_widget));
+      g_object_add_weak_pointer (G_OBJECT (assistant), (gpointer *)&assistant);
 
       create_page1 (assistant);
       create_page2 (assistant);
@@ -182,9 +189,9 @@ do_assistant (GtkWidget *do_widget)
       create_page4 (assistant);
 
       g_signal_connect (G_OBJECT (assistant), "cancel",
-                        G_CALLBACK (on_assistant_close_cancel), &assistant);
+                        G_CALLBACK (on_assistant_close_cancel), NULL);
       g_signal_connect (G_OBJECT (assistant), "close",
-                        G_CALLBACK (on_assistant_close_cancel), &assistant);
+                        G_CALLBACK (on_assistant_close_cancel), NULL);
       g_signal_connect (G_OBJECT (assistant), "apply",
                         G_CALLBACK (on_assistant_apply), NULL);
       g_signal_connect (G_OBJECT (assistant), "prepare",
@@ -194,10 +201,7 @@ do_assistant (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (assistant))
     gtk_widget_show (assistant);
   else
-    {
-      gtk_widget_destroy (assistant);
-      assistant = NULL;
-    }
+    gtk_window_destroy (GTK_WINDOW (assistant));
 
   return assistant;
 }

demos/gtk-demo/background.glsl

@@ -0,0 +1,26 @@
+uniform float u_time;
+
+void
+mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv)
+{
+  vec2 pos = (fragCoord.xy * 2.0 - resolution.xy)/ min (resolution.x, resolution.y) ;
+
+  float t0 = sin ((u_time + 0.00)*1.0);
+  float t1 = sin ((u_time + 0.30)*0.4);
+  float t2 = cos ((u_time + 0.23)*0.9);
+  float t3 = cos ((u_time + 0.41)*0.6);
+  float t4 = cos ((u_time + 0.11)*0.3);
+
+  vec2 p0 = vec2 (t1, t0) ;
+  vec2 p1 = vec2 (t2, t3) ;
+  vec2 p2 = vec2 (t4, t3) ;
+
+  float r = 1.0/distance (pos, p0);
+  float g = 1.0/distance (pos, p1);
+  float b = 1.0/distance (pos, p2);
+  float sum = r + g + b;
+
+  float alpha = 1.0 - pow (1.0/(sum), 40.0)*pow (10.0, 40.0*0.7);
+
+  fragColor = vec4 (r*0.5, g*0.5, b*0.5, 1.0) * alpha;
+}

demos/gtk-demo/blendmodes.ui

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="3.20"/>
   <object class="GtkWindow" id="window">
     <property name="resizable">0</property>
     <property name="title">CSS Blend Modes</property>
@@ -8,6 +7,10 @@
     <property name="default-height">300</property>
     <child>
       <object class="GtkGrid">
+        <property name="margin-start">12</property>
+        <property name="margin-end">12</property>
+        <property name="margin-top">12</property>
+        <property name="margin-bottom">12</property>
         <property name="row-spacing">12</property>
         <property name="column-spacing">12</property>
         <child>
@@ -18,20 +21,19 @@
               <class name="dim-label"/>
             </style>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">0</property>
+              <property name="column">0</property>
+              <property name="row">0</property>
             </layout>
           </object>
         </child>
         <child>
           <object class="GtkScrolledWindow" id="scrolledwindow">
-            <property name="can-focus">1</property>
             <property name="vexpand">1</property>
-            <property name="shadow-type">in</property>
+            <property name="has-frame">1</property>
             <property name="min-content-width">150</property>
             <layout>
-              <property name="left-attach">0</property>
-              <property name="top-attach">1</property>
+              <property name="column">0</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>
@@ -41,8 +43,8 @@
             <property name="hexpand">1</property>
             <property name="stack">stack</property>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">0</property>
+              <property name="column">1</property>
+              <property name="row">0</property>
             </layout>
           </object>
         </child>
@@ -68,8 +70,8 @@
                       <object class="GtkLabel">
                         <property name="label" translatable="yes">Duck</property>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">0</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -77,8 +79,8 @@
                       <object class="GtkLabel">
                         <property name="label" translatable="yes">Background</property>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">1</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -88,8 +90,8 @@
                           <class name="duck"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">0</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -99,8 +101,8 @@
                           <class name="gradient"/>
                         </style>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">1</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -109,8 +111,8 @@
                         <property name="label" translatable="yes">
 Blended picture</property>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">2</property>
+                          <property name="column">0</property>
+                          <property name="row">2</property>
                           <property name="column-span">2</property>
                         </layout>
                       </object>
@@ -122,8 +124,8 @@ Blended picture</property>
                           <class name="blend0"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">3</property>
+                          <property name="column">0</property>
+                          <property name="row">3</property>
                           <property name="column-span">2</property>
                         </layout>
                       </object>
@@ -147,8 +149,8 @@ Blended picture</property>
                       <object class="GtkLabel">
                         <property name="label" translatable="yes">Red</property>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">0</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -156,8 +158,8 @@ Blended picture</property>
                       <object class="GtkLabel">
                         <property name="label" translatable="yes">Blue</property>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">1</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -167,8 +169,8 @@ Blended picture</property>
                           <class name="red"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">0</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -178,8 +180,8 @@ Blended picture</property>
                           <class name="blue"/>
                         </style>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">1</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -188,8 +190,8 @@ Blended picture</property>
                         <property name="label" translatable="yes">
 Blended picture</property>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">2</property>
+                          <property name="column">0</property>
+                          <property name="row">2</property>
                           <property name="column-span">2</property>
                         </layout>
                       </object>
@@ -201,8 +203,8 @@ Blended picture</property>
                           <class name="blend1"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">3</property>
+                          <property name="column">0</property>
+                          <property name="row">3</property>
                           <property name="column-span">2</property>
                         </layout>
                       </object>
@@ -229,8 +231,8 @@ Blended picture</property>
                           <class name="cyan"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">0</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -240,8 +242,8 @@ Blended picture</property>
                           <class name="magenta"/>
                         </style>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">1</property>
+                          <property name="column">1</property>
+                          <property name="row">1</property>
                         </layout>
                       </object>
                     </child>
@@ -251,8 +253,8 @@ Blended picture</property>
                           <class name="yellow"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">3</property>
+                          <property name="column">0</property>
+                          <property name="row">3</property>
                         </layout>
                       </object>
                     </child>
@@ -263,8 +265,8 @@ Blended picture</property>
                           <class name="blend2"/>
                         </style>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">3</property>
+                          <property name="column">1</property>
+                          <property name="row">3</property>
                         </layout>
                       </object>
                     </child>
@@ -276,8 +278,8 @@ Blended picture</property>
                           <class name="dim-label"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">0</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -289,8 +291,8 @@ Blended picture</property>
                           <class name="dim-label"/>
                         </style>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">0</property>
+                          <property name="column">1</property>
+                          <property name="row">0</property>
                         </layout>
                       </object>
                     </child>
@@ -302,8 +304,8 @@ Blended picture</property>
                           <class name="dim-label"/>
                         </style>
                         <layout>
-                          <property name="left-attach">0</property>
-                          <property name="top-attach">2</property>
+                          <property name="column">0</property>
+                          <property name="row">2</property>
                         </layout>
                       </object>
                     </child>
@@ -315,8 +317,8 @@ Blended picture</property>
                           <attribute name="weight" value="bold"></attribute>
                         </attributes>
                         <layout>
-                          <property name="left-attach">1</property>
-                          <property name="top-attach">2</property>
+                          <property name="column">1</property>
+                          <property name="row">2</property>
                         </layout>
                       </object>
                     </child>
@@ -325,8 +327,8 @@ Blended picture</property>
               </object>
             </child>
             <layout>
-              <property name="left-attach">1</property>
-              <property name="top-attach">1</property>
+              <property name="column">1</property>
+              <property name="row">1</property>
             </layout>
           </object>
         </child>

demos/gtk-demo/bluroverlay.c

@@ -39,7 +39,7 @@ enum {
 static guint signals[LAST_SIGNAL] = { 0 };
 static GQuark child_data_quark = 0;
 
-G_DEFINE_TYPE (BlurOverlay, blur_overlay, GTK_TYPE_BIN)
+G_DEFINE_TYPE (BlurOverlay, blur_overlay, GTK_TYPE_WIDGET)
 
 static void
 blur_overlay_set_overlay_child (GtkWidget       *widget,
@@ -131,13 +131,11 @@ blur_overlay_child_update_style_classes (BlurOverlay *overlay,
   GtkAlign valign, halign;
   gboolean is_left, is_right, is_top, is_bottom;
   gboolean has_left, has_right, has_top, has_bottom;
-  GtkStyleContext *context;
 
-  context = gtk_widget_get_style_context (child);
-  has_left = gtk_style_context_has_class (context, GTK_STYLE_CLASS_LEFT);
-  has_right = gtk_style_context_has_class (context, GTK_STYLE_CLASS_RIGHT);
-  has_top = gtk_style_context_has_class (context, GTK_STYLE_CLASS_TOP);
-  has_bottom = gtk_style_context_has_class (context, GTK_STYLE_CLASS_BOTTOM);
+  has_left = gtk_widget_has_css_class (child, "left");
+  has_right = gtk_widget_has_css_class (child, "right");
+  has_top = gtk_widget_has_css_class (child, "top");
+  has_bottom = gtk_widget_has_css_class (child, "bottom");
 
   is_left = is_right = is_top = is_bottom = FALSE;
 
@@ -160,24 +158,24 @@ blur_overlay_child_update_style_classes (BlurOverlay *overlay,
     is_bottom = (child_allocation->y + child_allocation->height == height);
 
   if (has_left && !is_left)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
+    gtk_widget_remove_css_class (child, "left");
   else if (!has_left && is_left)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
+    gtk_widget_add_css_class (child, "left");
 
   if (has_right && !is_right)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
+    gtk_widget_remove_css_class (child, "right");
   else if (!has_right && is_right)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
+    gtk_widget_add_css_class (child, "right");
 
   if (has_top && !is_top)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
+    gtk_widget_remove_css_class (child, "top");
   else if (!has_top && is_top)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
+    gtk_widget_add_css_class (child, "top");
 
   if (has_bottom && !is_bottom)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
+    gtk_widget_remove_css_class (child, "bottom");
   else if (!has_bottom && is_bottom)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
+    gtk_widget_add_css_class (child, "bottom");
 }
 
 static void
@@ -206,7 +204,7 @@ blur_overlay_size_allocate (GtkWidget *widget,
   GtkWidget *child;
   GtkWidget *main_widget;
 
-  main_widget = gtk_bin_get_child (GTK_BIN (overlay));
+  main_widget = overlay->main_widget;
   if (main_widget && gtk_widget_get_visible (main_widget))
     gtk_widget_size_allocate (main_widget,
                               &(GtkAllocation) {
@@ -292,43 +290,6 @@ blur_overlay_get_child_position (BlurOverlay    *overlay,
   return TRUE;
 }
 
-static void
-blur_overlay_add (GtkContainer *container,
-                  GtkWidget    *widget)
-{
-  BlurOverlay *overlay = BLUR_OVERLAY (container);
-  gtk_widget_insert_after (widget, GTK_WIDGET (container), NULL);
-  overlay->main_widget = widget;  
-}
-
-static void
-blur_overlay_remove (GtkContainer *container,
-                     GtkWidget    *widget)
-{
-  BlurOverlay *overlay = BLUR_OVERLAY (container);
-  gtk_widget_unparent (widget);
-  if (overlay->main_widget == widget)
-    overlay->main_widget = NULL;
-}
-
-static void
-blur_overlay_forall (GtkContainer *overlay,
-                    GtkCallback   callback,
-                    gpointer      callback_data)
-{
-  GtkWidget *child;
-
-  child = gtk_widget_get_first_child (GTK_WIDGET (overlay));
-  while (child != NULL)
-    {
-      GtkWidget *next = gtk_widget_get_next_sibling (child);
-
-      (* callback) (child, callback_data);
-
-      child = next;
-    }
-}
-
 static void
 blur_overlay_snapshot (GtkWidget   *widget,
                       GtkSnapshot *snapshot)
@@ -422,21 +383,32 @@ blur_overlay_snapshot (GtkWidget   *widget,
   gsk_render_node_unref (main_widget_node);
 }
 
+static void
+blur_overlay_dispose (GObject *object)
+{
+  BlurOverlay *overlay = BLUR_OVERLAY (object);
+  GtkWidget *child;
+
+  g_clear_pointer (&overlay->main_widget, gtk_widget_unparent);
+
+  while ((child = gtk_widget_get_first_child (GTK_WIDGET (overlay))))
+    gtk_widget_unparent (child);
+
+  G_OBJECT_CLASS (blur_overlay_parent_class)->dispose (object);
+}
+
 static void
 blur_overlay_class_init (BlurOverlayClass *klass)
 {
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-  GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+
+  object_class->dispose = blur_overlay_dispose;
 
   widget_class->measure = blur_overlay_measure;
   widget_class->size_allocate = blur_overlay_size_allocate;
   widget_class->snapshot = blur_overlay_snapshot;
 
-  container_class->add = blur_overlay_add;
-  container_class->remove = blur_overlay_remove;
-  container_class->forall = blur_overlay_forall;
-
   klass->get_child_position = blur_overlay_get_child_position;
 
   signals[GET_CHILD_POSITION] =
@@ -479,3 +451,11 @@ blur_overlay_add_overlay (BlurOverlay *overlay,
 
   blur_overlay_set_overlay_child (widget, child);
 }
+
+void
+blur_overlay_set_child (BlurOverlay *overlay,
+                        GtkWidget   *widget)
+{
+  gtk_widget_insert_after (widget, GTK_WIDGET (overlay), NULL);
+  overlay->main_widget = widget;
+}

demos/gtk-demo/bluroverlay.h

@@ -37,14 +37,14 @@ typedef struct _BlurOverlayClass    BlurOverlayClass;
 
 struct _BlurOverlay
 {
-  GtkBin parent_instance;
+  GtkWidget parent_instance;
 
   GtkWidget *main_widget;
 };
 
 struct _BlurOverlayClass
 {
-  GtkBinClass parent_class;
+  GtkWidgetClass parent_class;
 
   gboolean (*get_child_position) (BlurOverlay   *overlay,
                                   GtkWidget     *widget,
@@ -59,6 +59,9 @@ GDK_AVAILABLE_IN_ALL
 void       blur_overlay_add_overlay (BlurOverlay *overlay,
                                      GtkWidget   *widget,
                                      double       blur);
+GDK_AVAILABLE_IN_ALL
+void       blur_overlay_set_child   (BlurOverlay *overlay,
+                                     GtkWidget   *widget);
 
 G_END_DECLS
 

demos/gtk-demo/builder.c

@@ -1,6 +1,8 @@
 /* Builder
+ * #Keywords: GMenu, GtkPopoverMenuBar, GtkBuilder, GtkStatusBar, GtkShortcutController, toolbar
  *
- * Demonstrates an interface loaded from a XML description.
+ * Demonstrates a traditional interface, loaded from a XML description,
+ * and shows how to connect actions to the menu items and toolbar buttons.
  */
 
 #include <gtk/gtk.h>
@@ -12,7 +14,7 @@ quit_activate (GSimpleAction *action,
 {
   GtkWidget *window = user_data;
 
-  gtk_widget_destroy (window);
+  gtk_window_destroy (GTK_WINDOW (window));
 }
 
 static void
@@ -21,13 +23,38 @@ about_activate (GSimpleAction *action,
                 gpointer       user_data)
 {
   GtkWidget *window = user_data;
-  GtkBuilder *builder;
   GtkWidget *about_dlg;
 
-  builder = g_object_get_data (G_OBJECT (window), "builder");
-  about_dlg = GTK_WIDGET (gtk_builder_get_object (builder, "aboutdialog1"));
-  gtk_dialog_run (GTK_DIALOG (about_dlg));
-  gtk_widget_hide (about_dlg);
+  about_dlg = GTK_WIDGET (g_object_get_data (G_OBJECT (window), "about"));
+  gtk_window_present (GTK_WINDOW (about_dlg));
+}
+
+static void
+remove_timeout (gpointer data)
+{
+  guint id = GPOINTER_TO_UINT (data);
+
+  g_source_remove (id);
+}
+
+static gboolean
+pop_status (gpointer data)
+{
+  gtk_statusbar_pop (GTK_STATUSBAR (data), 0);
+  g_object_set_data (G_OBJECT (data), "timeout", NULL);
+  return G_SOURCE_REMOVE;
+}
+
+static void
+status_message (GtkStatusbar *status,
+                const char   *text)
+{
+  guint id;
+
+  gtk_statusbar_push (GTK_STATUSBAR (status), 0, text);
+  id = g_timeout_add (5000, pop_status, status);
+
+  g_object_set_data_full (G_OBJECT (status), "timeout", GUINT_TO_POINTER (id), remove_timeout);
 }
 
 static void
@@ -35,7 +62,10 @@ help_activate (GSimpleAction *action,
                GVariant      *parameter,
                gpointer       user_data)
 {
-  g_print ("Help not available\n");
+  GtkWidget *status;
+
+  status = GTK_WIDGET (g_object_get_data (G_OBJECT (user_data), "status"));
+  status_message (GTK_STATUSBAR (status), "Help not available");
 }
 
 static void
@@ -43,7 +73,13 @@ not_implemented (GSimpleAction *action,
                  GVariant      *parameter,
                  gpointer       user_data)
 {
-  g_print ("Action “%s” not implemented\n", g_action_get_name (G_ACTION (action)));
+  GtkWidget *status;
+  char *text;
+
+  text = g_strdup_printf ("Action “%s” not implemented", g_action_get_name (G_ACTION (action)));
+  status = GTK_WIDGET (g_object_get_data (G_OBJECT (user_data), "status"));
+  status_message (GTK_STATUSBAR (status), text);
+  g_free (text);
 }
 
 static GActionEntry win_entries[] = {
@@ -63,36 +99,78 @@ GtkWidget *
 do_builder (GtkWidget *do_widget)
 {
   static GtkWidget *window = NULL;
-  GtkWidget *toolbar;
   GActionGroup *actions;
 
   if (!window)
     {
       GtkBuilder *builder;
+      GtkWidget *about;
+      GtkWidget *status;
+      GtkEventController *controller;
 
       builder = gtk_builder_new_from_resource ("/builder/demo.ui");
 
       window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
-      toolbar = GTK_WIDGET (gtk_builder_get_object (builder, "toolbar1"));
-      gtk_style_context_add_class (gtk_widget_get_style_context (toolbar),
-                                   "primary-toolbar");
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
       actions = (GActionGroup*)g_simple_action_group_new ();
       g_action_map_add_action_entries (G_ACTION_MAP (actions),
                                        win_entries, G_N_ELEMENTS (win_entries),
                                        window);
       gtk_widget_insert_action_group (window, "win", actions);
 
-      g_object_set_data_full (G_OBJECT(window), "builder", builder, g_object_unref);
+      controller = gtk_shortcut_controller_new ();
+      gtk_shortcut_controller_set_scope (GTK_SHORTCUT_CONTROLLER (controller),
+                                         GTK_SHORTCUT_SCOPE_GLOBAL);
+      gtk_widget_add_controller (window, controller);
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_n, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.new")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_o, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.open")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_s, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.save")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_s, GDK_CONTROL_MASK|GDK_SHIFT_MASK),
+                             gtk_named_action_new ("win.save-as")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_q, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.quit")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_c, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.copy")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_x, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.cut")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_v, GDK_CONTROL_MASK),
+                             gtk_named_action_new ("win.paste")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_F1, 0),
+                             gtk_named_action_new ("win.help")));
+      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
+           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_F7, 0),
+                             gtk_named_action_new ("win.about")));
+
+      about = GTK_WIDGET (gtk_builder_get_object (builder, "aboutdialog1"));
+      gtk_window_set_transient_for (GTK_WINDOW (about), GTK_WINDOW (window));
+      gtk_window_set_hide_on_close (GTK_WINDOW (about), TRUE);
+      g_object_set_data_full (G_OBJECT (window), "about",
+                              about, (GDestroyNotify)gtk_window_destroy);
+
+      status = GTK_WIDGET (gtk_builder_get_object (builder, "statusbar1"));
+      g_object_set_data (G_OBJECT (window), "status", status);
+
+      g_object_unref (builder);
     }
 
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/clipboard.c

@@ -12,10 +12,11 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <string.h>
+#include "demoimage.h"
 
 static GtkWidget *window = NULL;
 
-void
+static void
 copy_button_clicked (GtkWidget *button,
                      gpointer   user_data)
 {
@@ -31,7 +32,7 @@ copy_button_clicked (GtkWidget *button,
   gdk_clipboard_set_text (clipboard, gtk_editable_get_text (GTK_EDITABLE (entry)));
 }
 
-void
+static void
 paste_received (GObject      *source_object,
                 GAsyncResult *result,
                 gpointer      user_data)
@@ -68,14 +69,14 @@ paste_received (GObject      *source_object,
                                        "Could not paste text: %s",
                                        error->message);
       g_signal_connect (dialog, "response",
-                        G_CALLBACK (gtk_widget_destroy), NULL);
+                        G_CALLBACK (gtk_window_destroy), NULL);
       gtk_widget_show (dialog);
 
       g_error_free (error);
     }
 }
 
-void
+static void
 paste_button_clicked (GtkWidget *button,
                       gpointer   user_data)
 {
@@ -93,169 +94,6 @@ paste_button_clicked (GtkWidget *button,
   gdk_clipboard_read_text_async (clipboard, NULL, paste_received, entry);
 }
 
-static GdkPaintable *
-get_image_paintable (GtkImage *image)
-{
-  const gchar *icon_name;
-  GtkIconTheme *icon_theme;
-  GtkIconInfo *icon_info;
-
-  switch (gtk_image_get_storage_type (image))
-    {
-    case GTK_IMAGE_PAINTABLE:
-      return g_object_ref (gtk_image_get_paintable (image));
-    case GTK_IMAGE_ICON_NAME:
-      icon_name = gtk_image_get_icon_name (image);
-      icon_theme = gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (image)));
-      icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, 48, GTK_ICON_LOOKUP_GENERIC_FALLBACK);
-      if (icon_info == NULL)
-        return NULL;
-      return gtk_icon_info_load_icon (icon_info, NULL);
-    default:
-      g_warning ("Image storage type %d not handled",
-                 gtk_image_get_storage_type (image));
-      return NULL;
-    }
-}
-
-static void
-drag_begin (GtkDragSource *source,
-            GdkDrag       *drag,
-            GtkWidget     *widget)
-{
-  GdkPaintable *paintable;
-
-  paintable = get_image_paintable (GTK_IMAGE (widget));
-  if (paintable)
-    {
-      gtk_drag_source_set_icon (source, paintable, -2, -2);
-      g_object_unref (paintable);
-    }
-}
-
-static void
-get_texture (GValue   *value,
-             gpointer  data)
-{
-  GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (data));
-
-  if (GDK_IS_TEXTURE (paintable))
-    g_value_set_object (value, paintable);
-}
-
-static GdkContentProvider *
-prepare_drag (GtkDragSource *source,
-              double         x,
-              double         y,
-              GtkWidget     *image)
-{
-  return gdk_content_provider_new_with_callback (GDK_TYPE_TEXTURE, get_texture, image);
-}
-
-static void
-got_texture (GObject *source,
-             GAsyncResult *result,
-             gpointer data)
-{
-  GdkDrop *drop = GDK_DROP (source);
-  GtkWidget *image = data;
-  const GValue *value;
-  GError *error = NULL;
-
-  value = gdk_drop_read_value_finish (drop, result, &error);
-  if (value)
-    {
-      GdkTexture *texture = g_value_get_object (value);
-      gtk_image_set_from_paintable (GTK_IMAGE (image), GDK_PAINTABLE (texture));
-    }
-  else
-    {
-      g_print ("Failed to get data: %s\n", error->message);
-      g_error_free (error);
-    }
-}
-
-static gboolean
-drag_drop (GtkDropTarget *dest,
-           GdkDrop       *drop,
-           int            x,
-           int            y,
-           GtkWidget     *widget)
-{
-  if (gdk_drop_has_value (drop, GDK_TYPE_TEXTURE))
-    {
-      gdk_drop_read_value_async (drop, GDK_TYPE_TEXTURE, G_PRIORITY_DEFAULT, NULL, got_texture, widget);
-      return TRUE;
-    }
-
-  return FALSE;
-}
-
-static void
-copy_image (GSimpleAction *action,
-            GVariant      *value,
-            gpointer       data)
-{
-  GdkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (data));
-  GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (data));
-
-  if (GDK_IS_TEXTURE (paintable))
-    gdk_clipboard_set_texture (clipboard, GDK_TEXTURE (paintable));
-
-  if (paintable)
-    g_object_unref (paintable);
-}
-
-static void
-paste_image_received (GObject      *source,
-                      GAsyncResult *result,
-                      gpointer      data)
-{
-  GdkTexture *texture;
-
-  texture = gdk_clipboard_read_texture_finish (GDK_CLIPBOARD (source), result, NULL);
-  if (texture == NULL)
-    return;
-    
-  gtk_image_set_from_paintable (GTK_IMAGE (data), GDK_PAINTABLE (texture));
-  g_object_unref (texture);
-}
-
-static void
-paste_image (GSimpleAction *action,
-             GVariant      *value,
-             gpointer       data)
-{
-  GdkClipboard *clipboard = gtk_widget_get_clipboard (GTK_WIDGET (data));
-  gdk_clipboard_read_texture_async (clipboard, NULL, paste_image_received, data);
-}
-
-static void
-pressed_cb (GtkGesture *gesture,
-            int         n_press,
-            double      x,
-            double      y,
-            GtkWidget  *image)
-{
-  GtkWidget *popover;
-  GMenu *menu;
-  GMenuItem *item;
-
-  menu = g_menu_new (); 
-  item = g_menu_item_new (_("_Copy"), "clipboard.copy");
-  g_menu_append_item (menu, item);
-
-  item = g_menu_item_new (_("_Paste"), "clipboard.paste");
-  g_menu_append_item (menu, item);
-
-  popover = gtk_popover_menu_new_from_model (image, G_MENU_MODEL (menu));
-
-  gtk_popover_set_pointing_to (GTK_POPOVER (popover), &(GdkRectangle) { x, y, 1, 1});
-  gtk_popover_popup (GTK_POPOVER (popover));
-
-  g_object_unref (menu);
-}
-
 GtkWidget *
 do_clipboard (GtkWidget *do_widget)
 {
@@ -265,138 +103,89 @@ do_clipboard (GtkWidget *do_widget)
       GtkWidget *label;
       GtkWidget *entry, *button;
       GtkWidget *image;
-      GtkGesture *gesture;
-      GActionEntry entries[] = {
-        { "copy", copy_image, NULL, NULL, NULL },
-        { "paste", paste_image, NULL, NULL, NULL },
-      };
-      GActionGroup *actions;
-      GtkDragSource *source;
-      GtkDropTarget *dest;
-      GdkContentFormats *formats;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
       gtk_window_set_title (GTK_WINDOW (window), "Clipboard");
-
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      g_object_set (vbox, "margin", 8, NULL);
+      gtk_widget_set_margin_start (vbox, 8);
+      gtk_widget_set_margin_end (vbox, 8);
+      gtk_widget_set_margin_top (vbox, 8);
+      gtk_widget_set_margin_bottom (vbox, 8);
 
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       label = gtk_label_new ("\"Copy\" will copy the text\nin the entry to the clipboard");
 
-      gtk_container_add (GTK_CONTAINER (vbox), label);
+      gtk_box_append (GTK_BOX (vbox), label);
 
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      g_object_set (hbox, "margin", 8, NULL);
-      gtk_container_add (GTK_CONTAINER (vbox), hbox);
+      gtk_widget_set_margin_start (hbox, 8);
+      gtk_widget_set_margin_end (hbox, 8);
+      gtk_widget_set_margin_top (hbox, 8);
+      gtk_widget_set_margin_bottom (hbox, 8);
+      gtk_box_append (GTK_BOX (vbox), hbox);
 
       /* Create the first entry */
       entry = gtk_entry_new ();
-      gtk_container_add (GTK_CONTAINER (hbox), entry);
+      gtk_box_append (GTK_BOX (hbox), entry);
 
       /* Create the button */
       button = gtk_button_new_with_mnemonic (_("_Copy"));
-      gtk_container_add (GTK_CONTAINER (hbox), button);
+      gtk_box_append (GTK_BOX (hbox), button);
       g_signal_connect (button, "clicked",
                         G_CALLBACK (copy_button_clicked), entry);
 
       label = gtk_label_new ("\"Paste\" will paste the text from the clipboard to the entry");
-      gtk_container_add (GTK_CONTAINER (vbox), label);
+      gtk_box_append (GTK_BOX (vbox), label);
 
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      g_object_set (hbox, "margin", 8, NULL);
-      gtk_container_add (GTK_CONTAINER (vbox), hbox);
+      gtk_widget_set_margin_start (hbox, 8);
+      gtk_widget_set_margin_end (hbox, 8);
+      gtk_widget_set_margin_top (hbox, 8);
+      gtk_widget_set_margin_bottom (hbox, 8);
+      gtk_box_append (GTK_BOX (vbox), hbox);
 
       /* Create the second entry */
       entry = gtk_entry_new ();
-      gtk_container_add (GTK_CONTAINER (hbox), entry);
+      gtk_box_append (GTK_BOX (hbox), entry);
 
       /* Create the button */
       button = gtk_button_new_with_mnemonic (_("_Paste"));
-      gtk_container_add (GTK_CONTAINER (hbox), button);
+      gtk_box_append (GTK_BOX (hbox), button);
       g_signal_connect (button, "clicked",
                         G_CALLBACK (paste_button_clicked), entry);
 
       label = gtk_label_new ("Images can be transferred via the clipboard, too");
-      gtk_container_add (GTK_CONTAINER (vbox), label);
+      gtk_box_append (GTK_BOX (vbox), label);
 
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      g_object_set (hbox, "margin", 8, NULL);
-      gtk_container_add (GTK_CONTAINER (vbox), hbox);
+      gtk_widget_set_margin_start (hbox, 8);
+      gtk_widget_set_margin_end (hbox, 8);
+      gtk_widget_set_margin_top (hbox, 8);
+      gtk_widget_set_margin_bottom (hbox, 8);
+      gtk_box_append (GTK_BOX (vbox), hbox);
 
       /* Create the first image */
-      image = gtk_image_new_from_icon_name ("dialog-warning");
-      gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
-      gtk_container_add (GTK_CONTAINER (hbox), image);
-
-      /* make image a drag source */
-      source = gtk_drag_source_new ();
-      g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
-      g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (source));
-
-      /* accept drops on image */
-      formats = gdk_content_formats_new_for_gtype (GDK_TYPE_TEXTURE);
-      dest = gtk_drop_target_new (formats, GDK_ACTION_COPY);
-      gdk_content_formats_unref (formats);
-      g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (dest));
-
-      /* context menu on image */
-      gesture = gtk_gesture_click_new ();
-      gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
-      g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (gesture));
-
-      actions = G_ACTION_GROUP (g_simple_action_group_new ());
-      g_action_map_add_action_entries (G_ACTION_MAP (actions), entries, G_N_ELEMENTS (entries), image);
-
-      gtk_widget_insert_action_group (image, "clipboard", actions);
-
-      g_object_unref (actions);
+      image = demo_image_new ("dialog-warning");
+      gtk_box_append (GTK_BOX (hbox), image);
 
       /* Create the second image */
-      image = gtk_image_new_from_icon_name ("process-stop");
-      gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
-      gtk_container_add (GTK_CONTAINER (hbox), image);
+      image = demo_image_new ("process-stop");
+      gtk_box_append (GTK_BOX (hbox), image);
 
-      /* make image a drag source */
-      source = gtk_drag_source_new ();
-      g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
-      g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (source));
-
-      /* accept drops on image */
-      formats = gdk_content_formats_new_for_gtype (GDK_TYPE_TEXTURE);
-      dest = gtk_drop_target_new (formats, GDK_ACTION_COPY);
-      gdk_content_formats_unref (formats);
-      g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (dest));
-
-      /* context menu on image */
-      gesture = gtk_gesture_click_new ();
-      gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
-      g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), image);
-      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (gesture));
-
-      actions = G_ACTION_GROUP (g_simple_action_group_new ());
-      g_action_map_add_action_entries (G_ACTION_MAP (actions), entries, G_N_ELEMENTS (entries), image);
-
-      gtk_widget_insert_action_group (image, "clipboard", actions);
-
-      g_object_unref (actions);
+      /* Create the third image */
+      image = demo_image_new ("weather-clear");
+      gtk_box_append (GTK_BOX (hbox), image);
     }
 
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/cogs.glsl

@@ -0,0 +1,224 @@
+// Originally from: https://www.shadertoy.com/view/3ljyDD
+// License CC0: Hexagonal tiling + cog wheels
+//  Nothing fancy, just hexagonal tiling + cog wheels
+
+#define PI      3.141592654
+#define TAU     (2.0*PI)
+#define MROT(a) mat2(cos(a), sin(a), -sin(a), cos(a))
+
+float hash(in vec2 co) {
+  return fract(sin(dot(co.xy ,vec2(12.9898,58.233))) * 13758.5453);
+}
+
+float pcos(float a) {
+  return 0.5 + 0.5*cos(a);
+}
+
+void rot(inout vec2 p, float a) {
+  float c = cos(a);
+  float s = sin(a);
+  p = vec2(c*p.x + s*p.y, -s*p.x + c*p.y);
+}
+
+float modPolar(inout vec2 p, float repetitions) {
+  float angle = 2.0*PI/repetitions;
+  float a = atan(p.y, p.x) + angle/2.;
+  float r = length(p);
+  float c = floor(a/angle);
+  a = mod(a,angle) - angle/2.;
+  p = vec2(cos(a), sin(a))*r;
+  // For an odd number of repetitions, fix cell index of the cell in -x direction
+  // (cell index would be e.g. -5 and 5 in the two halves of the cell):
+  if (abs(c) >= (repetitions/2.0)) c = abs(c);
+  return c;
+}
+
+float pmin(float a, float b, float k) {
+  float h = clamp( 0.5+0.5*(b-a)/k, 0.0, 1.0 );
+  return mix( b, a, h ) - k*h*(1.0-h);
+}
+
+const vec2 sz       = vec2(1.0, sqrt(3.0));
+const vec2 hsz      = 0.5*sz;
+const float smallCount = 16.0;
+
+vec2 hextile(inout vec2 p) {
+  // See Art of Code: Hexagonal Tiling Explained!
+  // https://www.youtube.com/watch?v=VmrIDyYiJBA
+
+  vec2 p1 = mod(p, sz)-hsz;
+  vec2 p2 = mod(p - hsz*1.0, sz)-hsz;
+  vec2 p3 = mix(p2, p1, vec2(length(p1) < length(p2)));
+  vec2 n = p3 - p;
+  p = p3;
+
+  return n;
+}
+
+float circle(vec2 p, float r) {
+  return length(p) - r;
+}
+
+float box(vec2 p, vec2 b) {
+  vec2 d = abs(p)-b;
+  return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
+}
+
+float unevenCapsule(vec2 p, float r1, float r2, float h) {
+  p.x = abs(p.x);
+  float b = (r1-r2)/h;
+  float a = sqrt(1.0-b*b);
+  float k = dot(p,vec2(-b,a));
+  if( k < 0.0 ) return length(p) - r1;
+  if( k > a*h ) return length(p-vec2(0.0,h)) - r2;
+  return dot(p, vec2(a,b) ) - r1;
+}
+
+float cogwheel(vec2 p, float innerRadius, float outerRadius, float cogs, float holes) {
+  float cogWidth  = 0.25*innerRadius*TAU/cogs;
+
+  float d0 = circle(p, innerRadius);
+
+  vec2 icp = p;
+  modPolar(icp, holes);
+  icp -= vec2(innerRadius*0.55, 0.0);
+  float d1 = circle(icp, innerRadius*0.25);
+
+  vec2 cp = p;
+  modPolar(cp, cogs);
+  cp -= vec2(innerRadius, 0.0);
+  float d2 = unevenCapsule(cp.yx, cogWidth, cogWidth*0.75, (outerRadius-innerRadius));
+
+  float d3 = circle(p, innerRadius*0.20);
+
+  float d = 1E6;
+  d = min(d, d0);
+  d = pmin(d, d2, 0.5*cogWidth);
+  d = min(d, d2);
+  d = max(d, -d1);
+  d = max(d, -d3);
+
+  return d;
+}
+
+float ccell1(vec2 p, float r) {
+  float d = 1E6;
+  const float bigCount = 60.0;
+
+  vec2 cp0 = p;
+  rot(cp0, -iTime*TAU/bigCount);
+  float d0 = cogwheel(cp0, 0.36, 0.38, bigCount, 5.0);
+
+  vec2 cp1 = p;
+  float nm = modPolar(cp1, 6.0);
+
+  cp1 -= vec2(0.5, 0.0);
+  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
+  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
+
+  d = min(d, d0);
+  d = min(d, d1);
+  return d;
+}
+
+float ccell2(vec2 p, float r) {
+  float d = 1E6;
+  vec2 cp0 = p;
+  float nm = modPolar(cp0, 6.0);
+  vec2 cp1 = cp0;
+  const float off = 0.275;
+  const float count = smallCount + 2.0;
+  cp0 -= vec2(off, 0.0);
+  rot(cp0, 0.+TAU*nm/2.0 - iTime*TAU/count);
+  float d0 = cogwheel(cp0, 0.09, 0.105, count, 5.0);
+
+
+  cp1 -= vec2(0.5, 0.0);
+  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
+  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
+
+  float l = length(p);
+  float d2 = l - (off+0.055);
+  float d3 = d2 + 0.020;;
+
+  vec2 tp0 = p;
+  modPolar(tp0, 60.0);
+  tp0.x -= off;
+  float d4 = box(tp0, vec2(0.0125, 0.005));
+
+  float ctime = -(iTime*0.05 + r)*TAU;
+
+  vec2 tp1 = p;
+  rot(tp1, ctime*12.0);
+  tp1.x -= 0.13;
+  float d5 = box(tp1, vec2(0.125, 0.005));
+
+  vec2 tp2 = p;
+  rot(tp2, ctime);
+  tp2.x -= 0.13*0.5;
+  float d6 = box(tp2, vec2(0.125*0.5, 0.0075));
+
+  float d7 = l - 0.025;
+  float d8 = l - 0.0125;
+
+  d = min(d, d0);
+  d = min(d, d1);
+  d = min(d, d2);
+  d = max(d, -d3);
+  d = min(d, d4);
+  d = min(d, d5);
+  d = min(d, d6);
+  d = min(d, d7);
+  d = max(d, -d8);
+
+  return d;
+}
+
+float df(vec2 p, float scale, inout vec2 nn) {
+  p /= scale;
+  nn = hextile(p);
+  nn = floor(nn + 0.5);
+  float r = hash(nn);
+
+  float d;;
+
+  if (r < 0.5) {
+    d = ccell1(p, r);
+  } else {
+    d = ccell2(p, r);
+  }
+
+  return d*scale;
+}
+
+vec3 postProcess(vec3 col, vec2 q)  {
+  //col = saturate(col);
+  col=pow(clamp(col,0.0,1.0),vec3(0.75));
+  col=col*0.6+0.4*col*col*(3.0-2.0*col);  // contrast
+  col=mix(col, vec3(dot(col, vec3(0.33))), -0.4);  // satuation
+  col*=0.5+0.5*pow(19.0*q.x*q.y*(1.0-q.x)*(1.0-q.y),0.7);  // vigneting
+  return col;
+}
+
+void mainImage(out vec4 fragColor, vec2 fragCoord) {
+  vec2 q = fragCoord/iResolution.xy;
+  vec2 p = -1.0 + 2.0*q;
+  p.x *= iResolution.x/iResolution.y;
+  float tm = iTime*0.1;
+  p += vec2(cos(tm), sin(tm*sqrt(0.5)));
+  float z = mix(0.5, 1.0, pcos(tm*sqrt(0.3)));
+  float aa = 4.0 / iResolution.y;
+
+  vec2 nn = vec2(0.0);
+  float d = df(p, z, nn);
+
+  vec3 col = vec3(160.0)/vec3(255.0);
+  vec3 baseCol = vec3(0.3);
+  vec4 logoCol = vec4(baseCol, 1.0)*smoothstep(-aa, 0.0, -d);
+  col = mix(col, logoCol.xyz, pow(logoCol.w, 8.0));
+  col += 0.4*pow(abs(sin(20.0*d)), 0.6);
+
+  col = postProcess(col, q);
+
+  fragColor = vec4(col, 1.0);
+}

demos/gtk-demo/cogs2.glsl

@@ -0,0 +1,226 @@
+uniform float iTime;
+
+// Originally from: https://www.shadertoy.com/view/3ljyDD
+// License CC0: Hexagonal tiling + cog wheels
+//  Nothing fancy, just hexagonal tiling + cog wheels
+
+#define PI      3.141592654
+#define TAU     (2.0*PI)
+#define MROT(a) mat2(cos(a), sin(a), -sin(a), cos(a))
+
+float hash(in vec2 co) {
+  return fract(sin(dot(co.xy ,vec2(12.9898,58.233))) * 13758.5453);
+}
+
+float pcos(float a) {
+  return 0.5 + 0.5*cos(a);
+}
+
+void rot(inout vec2 p, float a) {
+  float c = cos(a);
+  float s = sin(a);
+  p = vec2(c*p.x + s*p.y, -s*p.x + c*p.y);
+}
+
+float modPolar(inout vec2 p, float repetitions) {
+  float angle = 2.0*PI/repetitions;
+  float a = atan(p.y, p.x) + angle/2.;
+  float r = length(p);
+  float c = floor(a/angle);
+  a = mod(a,angle) - angle/2.;
+  p = vec2(cos(a), sin(a))*r;
+  // For an odd number of repetitions, fix cell index of the cell in -x direction
+  // (cell index would be e.g. -5 and 5 in the two halves of the cell):
+  if (abs(c) >= (repetitions/2.0)) c = abs(c);
+  return c;
+}
+
+float pmin(float a, float b, float k) {
+  float h = clamp( 0.5+0.5*(b-a)/k, 0.0, 1.0 );
+  return mix( b, a, h ) - k*h*(1.0-h);
+}
+
+const vec2 sz       = vec2(1.0, sqrt(3.0));
+const vec2 hsz      = 0.5*sz;
+const float smallCount = 16.0;
+
+vec2 hextile(inout vec2 p) {
+  // See Art of Code: Hexagonal Tiling Explained!
+  // https://www.youtube.com/watch?v=VmrIDyYiJBA
+
+  vec2 p1 = mod(p, sz)-hsz;
+  vec2 p2 = mod(p - hsz*1.0, sz)-hsz;
+  vec2 p3 = mix(p2, p1, vec2(length(p1) < length(p2)));
+  vec2 n = p3 - p;
+  p = p3;
+
+  return n;
+}
+
+float circle(vec2 p, float r) {
+  return length(p) - r;
+}
+
+float box(vec2 p, vec2 b) {
+  vec2 d = abs(p)-b;
+  return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
+}
+
+float unevenCapsule(vec2 p, float r1, float r2, float h) {
+  p.x = abs(p.x);
+  float b = (r1-r2)/h;
+  float a = sqrt(1.0-b*b);
+  float k = dot(p,vec2(-b,a));
+  if( k < 0.0 ) return length(p) - r1;
+  if( k > a*h ) return length(p-vec2(0.0,h)) - r2;
+  return dot(p, vec2(a,b) ) - r1;
+}
+
+float cogwheel(vec2 p, float innerRadius, float outerRadius, float cogs, float holes) {
+  float cogWidth  = 0.25*innerRadius*TAU/cogs;
+
+  float d0 = circle(p, innerRadius);
+
+  vec2 icp = p;
+  modPolar(icp, holes);
+  icp -= vec2(innerRadius*0.55, 0.0);
+  float d1 = circle(icp, innerRadius*0.25);
+
+  vec2 cp = p;
+  modPolar(cp, cogs);
+  cp -= vec2(innerRadius, 0.0);
+  float d2 = unevenCapsule(cp.yx, cogWidth, cogWidth*0.75, (outerRadius-innerRadius));
+
+  float d3 = circle(p, innerRadius*0.20);
+
+  float d = 1E6;
+  d = min(d, d0);
+  d = pmin(d, d2, 0.5*cogWidth);
+  d = min(d, d2);
+  d = max(d, -d1);
+  d = max(d, -d3);
+
+  return d;
+}
+
+float ccell1(vec2 p, float r) {
+  float d = 1E6;
+  const float bigCount = 60.0;
+
+  vec2 cp0 = p;
+  rot(cp0, -iTime*TAU/bigCount);
+  float d0 = cogwheel(cp0, 0.36, 0.38, bigCount, 5.0);
+
+  vec2 cp1 = p;
+  float nm = modPolar(cp1, 6.0);
+
+  cp1 -= vec2(0.5, 0.0);
+  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
+  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
+
+  d = min(d, d0);
+  d = min(d, d1);
+  return d;
+}
+
+float ccell2(vec2 p, float r) {
+  float d = 1E6;
+  vec2 cp0 = p;
+  float nm = modPolar(cp0, 6.0);
+  vec2 cp1 = cp0;
+  const float off = 0.275;
+  const float count = smallCount + 2.0;
+  cp0 -= vec2(off, 0.0);
+  rot(cp0, 0.+TAU*nm/2.0 - iTime*TAU/count);
+  float d0 = cogwheel(cp0, 0.09, 0.105, count, 5.0);
+
+
+  cp1 -= vec2(0.5, 0.0);
+  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
+  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
+
+  float l = length(p);
+  float d2 = l - (off+0.055);
+  float d3 = d2 + 0.020;;
+
+  vec2 tp0 = p;
+  modPolar(tp0, 60.0);
+  tp0.x -= off;
+  float d4 = box(tp0, vec2(0.0125, 0.005));
+
+  float ctime = -(iTime*0.05 + r)*TAU;
+
+  vec2 tp1 = p;
+  rot(tp1, ctime*12.0);
+  tp1.x -= 0.13;
+  float d5 = box(tp1, vec2(0.125, 0.005));
+
+  vec2 tp2 = p;
+  rot(tp2, ctime);
+  tp2.x -= 0.13*0.5;
+  float d6 = box(tp2, vec2(0.125*0.5, 0.0075));
+
+  float d7 = l - 0.025;
+  float d8 = l - 0.0125;
+
+  d = min(d, d0);
+  d = min(d, d1);
+  d = min(d, d2);
+  d = max(d, -d3);
+  d = min(d, d4);
+  d = min(d, d5);
+  d = min(d, d6);
+  d = min(d, d7);
+  d = max(d, -d8);
+
+  return d;
+}
+
+float df(vec2 p, float scale, inout vec2 nn) {
+  p /= scale;
+  nn = hextile(p);
+  nn = floor(nn + 0.5);
+  float r = hash(nn);
+
+  float d;;
+
+  if (r < 0.5) {
+    d = ccell1(p, r);
+  } else {
+    d = ccell2(p, r);
+  }
+
+  return d*scale;
+}
+
+vec3 postProcess(vec3 col, vec2 q)  {
+  //col = saturate(col);
+  col=pow(clamp(col,0.0,1.0),vec3(0.75));
+  col=col*0.6+0.4*col*col*(3.0-2.0*col);  // contrast
+  col=mix(col, vec3(dot(col, vec3(0.33))), -0.4);  // satuation
+  col*=0.5+0.5*pow(19.0*q.x*q.y*(1.0-q.x)*(1.0-q.y),0.7);  // vigneting
+  return col;
+}
+
+void mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv) {
+  vec2 q = fragCoord/resolution.xy;
+  vec2 p = -1.0 + 2.0*q;
+  p.x *= resolution.x/resolution.y;
+  float tm = iTime*0.1;
+  p += vec2(cos(tm), sin(tm*sqrt(0.5)));
+  float z = mix(0.5, 1.0, pcos(tm*sqrt(0.3)));
+  float aa = 4.0 / resolution.y;
+
+  vec2 nn = vec2(0.0);
+  float d = df(p, z, nn);
+
+  vec3 col = vec3(160.0)/vec3(255.0);
+  vec3 baseCol = vec3(0.3);
+  vec4 logoCol = vec4(baseCol, 1.0)*smoothstep(-aa, 0.0, -d);
+  col = mix(col, logoCol.xyz, pow(logoCol.w, 8.0));
+  col += 0.4*pow(abs(sin(20.0*d)), 0.6);
+
+  col = postProcess(col, q);
+
+  fragColor = vec4(col, 1.0);
+}

demos/gtk-demo/colorsel.c

@@ -1,116 +0,0 @@
-/* Color Chooser
- *
- * A GtkColorChooser lets the user choose a color. There are several
- * implementations of the GtkColorChooser interface in GTK. The
- * GtkColorChooserDialog is a prebuilt dialog containing a
- * GtkColorChooserWidget.
- */
-
-#include <gtk/gtk.h>
-
-static GtkWidget *window = NULL;
-static GtkWidget *da;
-static GdkRGBA color;
-static GtkWidget *frame;
-
-/* draw callback for the drawing area
- */
-static void
-draw_function (GtkDrawingArea *da,
-               cairo_t        *cr,
-               int             width,
-               int             height,
-               gpointer        data)
-{
-  gdk_cairo_set_source_rgba (cr, &color);
-  cairo_paint (cr);
-}
-
-static void
-response_cb (GtkDialog *dialog,
-             gint       response_id,
-             gpointer   user_data)
-{
-  if (response_id == GTK_RESPONSE_OK)
-    {
-      gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &color);
-      gtk_widget_queue_draw (da);
-    }
-
-  gtk_widget_destroy (GTK_WIDGET (dialog));
-}
-
-static void
-change_color_callback (GtkWidget *button,
-                       gpointer   data)
-{
-  GtkWidget *dialog;
-
-  dialog = gtk_color_chooser_dialog_new ("Changing color", GTK_WINDOW (window));
-  gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
-  gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (dialog), &color);
-
-  g_signal_connect (dialog, "response",
-                    G_CALLBACK (response_cb), NULL);
-
-  gtk_widget_show (dialog);
-}
-
-GtkWidget *
-do_colorsel (GtkWidget *do_widget)
-{
-  GtkWidget *vbox;
-  GtkWidget *button;
-
-  if (!window)
-    {
-      color.red = 0;
-      color.blue = 1;
-      color.green = 0;
-      color.alpha = 1;
-
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
-      gtk_window_set_display (GTK_WINDOW (window),
-                              gtk_widget_get_display (do_widget));
-      gtk_window_set_title (GTK_WINDOW (window), "Color Chooser");
-      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
-
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
-
-      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
-      g_object_set (vbox, "margin", 12, NULL);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
-
-      /*
-       * Create the color swatch area
-       */
-
-      frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
-      gtk_container_add (GTK_CONTAINER (vbox), frame);
-
-      da = gtk_drawing_area_new ();
-      gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 200);
-      gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 200);
-      gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_function, NULL, NULL);
-
-      gtk_container_add (GTK_CONTAINER (frame), da);
-
-      button = gtk_button_new_with_mnemonic ("_Change the above color");
-      gtk_widget_set_halign (button, GTK_ALIGN_END);
-      gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
-
-      gtk_container_add (GTK_CONTAINER (vbox), button);
-
-      g_signal_connect (button, "clicked",
-                        G_CALLBACK (change_color_callback), NULL);
-    }
-
-  if (!gtk_widget_get_visible (window))
-    gtk_widget_show (window);
-  else
-    gtk_widget_destroy (window);
-
-  return window;
-}

demos/gtk-demo/combobox.c

@@ -1,4 +1,5 @@
 /* Combo Boxes
+ * #Keywords: GtkCellRenderer
  *
  * The GtkComboBox widget allows to select one option out of a list.
  * The GtkComboBoxEntry additionally allows the user to enter a value
@@ -19,7 +20,7 @@ enum
 static GtkTreeModel *
 create_icon_store (void)
 {
-  const gchar *icon_names[6] = {
+  const char *icon_names[6] = {
     "dialog-warning",
     "process-stop",
     "document-new",
@@ -27,7 +28,7 @@ create_icon_store (void)
     NULL,
     "document-open"
   };
-  const gchar *labels[6] = {
+  const char *labels[6] = {
     N_("Warning"),
     N_("Stop"),
     N_("New"),
@@ -38,7 +39,7 @@ create_icon_store (void)
 
   GtkTreeIter iter;
   GtkListStore *store;
-  gint i;
+  int i;
 
   store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);
 
@@ -77,7 +78,7 @@ set_sensitive (GtkCellLayout   *cell_layout,
                gpointer         data)
 {
   GtkTreePath *path;
-  gint *indices;
+  int *indices;
   gboolean sensitive;
 
   path = gtk_tree_model_get_path (tree_model, iter);
@@ -111,8 +112,8 @@ static GtkTreeModel *
 create_capital_store (void)
 {
   struct {
-    gchar *group;
-    gchar *capital;
+    const char *group;
+    const char *capital;
   } capitals[] = {
     { "A - B", NULL },
     { NULL, "Albany" },
@@ -175,7 +176,7 @@ create_capital_store (void)
 
   GtkTreeIter iter, iter2;
   GtkTreeStore *store;
-  gint i;
+  int i;
 
   store = gtk_tree_store_new (1, G_TYPE_STRING);
 
@@ -234,7 +235,7 @@ typedef struct _MaskEntry MaskEntry;
 struct _MaskEntry
 {
   GtkEntry entry;
-  gchar *mask;
+  const char *mask;
 };
 
 typedef struct _MaskEntryClass MaskEntryClass;
@@ -246,6 +247,7 @@ struct _MaskEntryClass
 
 static void mask_entry_editable_init (GtkEditableInterface *iface);
 
+static GType mask_entry_get_type (void);
 G_DEFINE_TYPE_WITH_CODE (MaskEntry, mask_entry, GTK_TYPE_ENTRY,
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
                                                 mask_entry_editable_init));
@@ -310,32 +312,36 @@ do_combobox (GtkWidget *do_widget)
 
   if (!window)
   {
-    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+    window = gtk_window_new ();
     gtk_window_set_display (GTK_WINDOW (window),
                             gtk_widget_get_display (do_widget));
     gtk_window_set_title (GTK_WINDOW (window), "Combo Boxes");
-
-    g_signal_connect (window, "destroy",
-                      G_CALLBACK (gtk_widget_destroyed), &window);
+    g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
     vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
-    g_object_set (vbox, "margin", 10, NULL);
-    gtk_container_add (GTK_CONTAINER (window), vbox);
+    gtk_widget_set_margin_start (vbox, 10);
+    gtk_widget_set_margin_end (vbox, 10);
+    gtk_widget_set_margin_top (vbox, 10);
+    gtk_widget_set_margin_bottom (vbox, 10);
+    gtk_window_set_child (GTK_WINDOW (window), vbox);
 
     /* A combobox demonstrating cell renderers, separators and
      *  insensitive rows
      */
     frame = gtk_frame_new ("Items with icons");
-    gtk_container_add (GTK_CONTAINER (vbox), frame);
+    gtk_box_append (GTK_BOX (vbox), frame);
 
     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    g_object_set (box, "margin", 5, NULL);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_widget_set_margin_start (box, 5);
+    gtk_widget_set_margin_end (box, 5);
+    gtk_widget_set_margin_top (box, 5);
+    gtk_widget_set_margin_bottom (box, 5);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     model = create_icon_store ();
     combo = gtk_combo_box_new_with_model (model);
     g_object_unref (model);
-    gtk_container_add (GTK_CONTAINER (box), combo);
+    gtk_box_append (GTK_BOX (box), combo);
 
     renderer = gtk_cell_renderer_pixbuf_new ();
     gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, FALSE);
@@ -367,16 +373,19 @@ do_combobox (GtkWidget *do_widget)
     /* A combobox demonstrating trees.
      */
     frame = gtk_frame_new ("Where are we ?");
-    gtk_container_add (GTK_CONTAINER (vbox), frame);
+    gtk_box_append (GTK_BOX (vbox), frame);
 
     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    g_object_set (box, "margin", 5, NULL);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_widget_set_margin_start (box, 5);
+    gtk_widget_set_margin_end (box, 5);
+    gtk_widget_set_margin_top (box, 5);
+    gtk_widget_set_margin_bottom (box, 5);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     model = create_capital_store ();
     combo = gtk_combo_box_new_with_model (model);
     g_object_unref (model);
-    gtk_container_add (GTK_CONTAINER (box), combo);
+    gtk_box_append (GTK_BOX (box), combo);
 
     renderer = gtk_cell_renderer_text_new ();
     gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
@@ -395,47 +404,52 @@ do_combobox (GtkWidget *do_widget)
 
     /* A GtkComboBoxEntry with validation */
     frame = gtk_frame_new ("Editable");
-    gtk_container_add (GTK_CONTAINER (vbox), frame);
+    gtk_box_append (GTK_BOX (vbox), frame);
 
     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    g_object_set (box, "margin", 5, NULL);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_widget_set_margin_start (box, 5);
+    gtk_widget_set_margin_end (box, 5);
+    gtk_widget_set_margin_top (box, 5);
+    gtk_widget_set_margin_bottom (box, 5);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     combo = gtk_combo_box_text_new_with_entry ();
     fill_combo_entry (combo);
-    gtk_container_add (GTK_CONTAINER (box), combo);
+    gtk_box_append (GTK_BOX (box), combo);
 
     entry = g_object_new (TYPE_MASK_ENTRY, NULL);
     MASK_ENTRY (entry)->mask = "^([0-9]*|One|Two|2\302\275|Three)$";
 
-    gtk_container_remove (GTK_CONTAINER (combo), gtk_bin_get_child (GTK_BIN (combo)));
-    gtk_container_add (GTK_CONTAINER (combo), entry);
+    gtk_combo_box_set_child (GTK_COMBO_BOX (combo), entry);
 
     /* A combobox with string IDs */
     frame = gtk_frame_new ("String IDs");
-    gtk_container_add (GTK_CONTAINER (vbox), frame);
+    gtk_box_append (GTK_BOX (vbox), frame);
 
     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    g_object_set (box, "margin", 5, NULL);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_widget_set_margin_start (box, 5);
+    gtk_widget_set_margin_end (box, 5);
+    gtk_widget_set_margin_top (box, 5);
+    gtk_widget_set_margin_bottom (box, 5);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     combo = gtk_combo_box_text_new ();
     gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "never", "Not visible");
     gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "when-active", "Visible when active");
     gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "always", "Always visible");
-    gtk_container_add (GTK_CONTAINER (box), combo);
+    gtk_box_append (GTK_BOX (box), combo);
 
     entry = gtk_entry_new ();
     g_object_bind_property (combo, "active-id",
                             entry, "text",
                             G_BINDING_BIDIRECTIONAL);
-    gtk_container_add (GTK_CONTAINER (box), entry);
+    gtk_box_append (GTK_BOX (box), entry);
   }
 
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/constraints.c

@@ -1,8 +1,16 @@
-/* Constraints/Simple
+/* Constraints/Simple Constraints
+ * #Keywords: GtkLayoutManager
  *
  * GtkConstraintLayout provides a layout manager that uses relations
- * between widgets (also known as "constraints") to compute the position
+ * between widgets (also known as “constraints”) to compute the position
  * and size of each child.
+ *
+ * In addition to child widgets, the constraints can involve spacer
+ * objects (also known as “guides”). This example has a guide between
+ * the two buttons in the top row.
+ *
+ * Try resizing the window to see how the constraints react to update
+ * the layout.
  */
 
 #include <glib/gi18n.h>
@@ -21,23 +29,24 @@ struct _SimpleGrid
 G_DEFINE_TYPE (SimpleGrid, simple_grid, GTK_TYPE_WIDGET)
 
 static void
-simple_grid_destroy (GtkWidget *widget)
+simple_grid_dispose (GObject *object)
 {
-  SimpleGrid *self = SIMPLE_GRID (widget);
+  SimpleGrid *self = SIMPLE_GRID (object);
 
-  g_clear_pointer (&self->button1, gtk_widget_destroy);
-  g_clear_pointer (&self->button2, gtk_widget_destroy);
-  g_clear_pointer (&self->button3, gtk_widget_destroy);
+  g_clear_pointer (&self->button1, gtk_widget_unparent);
+  g_clear_pointer (&self->button2, gtk_widget_unparent);
+  g_clear_pointer (&self->button3, gtk_widget_unparent);
 
-  GTK_WIDGET_CLASS (simple_grid_parent_class)->destroy (widget);
+  G_OBJECT_CLASS (simple_grid_parent_class)->dispose (object);
 }
 
 static void
 simple_grid_class_init (SimpleGridClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
-  widget_class->destroy = simple_grid_destroy;
+  object_class->dispose = simple_grid_dispose;
 
   gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
 }
@@ -232,15 +241,12 @@ simple_grid_init (SimpleGrid *self)
 
   self->button1 = gtk_button_new_with_label ("Child 1");
   gtk_widget_set_parent (self->button1, widget);
-  gtk_widget_set_name (self->button1, "button1");
 
   self->button2 = gtk_button_new_with_label ("Child 2");
   gtk_widget_set_parent (self->button2, widget);
-  gtk_widget_set_name (self->button2, "button2");
 
   self->button3 = gtk_button_new_with_label ("Child 3");
   gtk_widget_set_parent (self->button3, widget);
-  gtk_widget_set_name (self->button3, "button3");
 
   GtkLayoutManager *manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
   build_constraints (self, GTK_CONSTRAINT_LAYOUT (manager));
@@ -253,37 +259,27 @@ do_constraints (GtkWidget *do_widget)
 
  if (!window)
    {
-     GtkWidget *header, *box, *grid, *button;
+     GtkWidget *box, *grid;
 
-     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+     window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-
-     header = gtk_header_bar_new ();
-     gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Constraints");
-     gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
-     gtk_window_set_titlebar (GTK_WINDOW (window), header);
-     g_signal_connect (window, "destroy",
-                       G_CALLBACK (gtk_widget_destroyed), &window);
+     gtk_window_set_title (GTK_WINDOW (window), "Simple Constraints");
+     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
+     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_container_add (GTK_CONTAINER (window), box);
+     gtk_window_set_child (GTK_WINDOW (window), box);
 
      grid = g_object_new (simple_grid_get_type (), NULL);
      gtk_widget_set_hexpand (grid, TRUE);
      gtk_widget_set_vexpand (grid, TRUE);
-     gtk_container_add (GTK_CONTAINER (box), grid);
-
-     button = gtk_button_new_with_label ("Close");
-     gtk_container_add (GTK_CONTAINER (box), button);
-     gtk_widget_set_hexpand (grid, TRUE);
-     g_signal_connect_swapped (button, "clicked",
-                               G_CALLBACK (gtk_widget_destroy), window);
+     gtk_box_append (GTK_BOX (box), grid);
    }
 
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-   gtk_widget_destroy (window);
+   gtk_window_destroy (GTK_WINDOW (window));
 
  return window;
 }

demos/gtk-demo/constraints_builder.c

@@ -0,0 +1,74 @@
+/* Constraints/Builder
+ *
+ * GtkConstraintLayouts can be created in .ui files, and constraints can
+ * be set up at that time as well, as this example demonstrates. It shows
+ * various ways to do spacing and sizing with constraints.
+ *
+ * Make the window wider to see the rows react differently
+ */
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE (ConstraintsGrid, constraints_grid, CONSTRAINTS, GRID, GtkWidget)
+
+struct _ConstraintsGrid
+{
+  GtkWidget parent_instance;
+};
+
+G_DEFINE_TYPE (ConstraintsGrid, constraints_grid, GTK_TYPE_WIDGET)
+
+static void
+constraints_grid_init (ConstraintsGrid *grid)
+{
+}
+
+static void
+constraints_grid_dispose (GObject *object)
+{
+  GtkWidget *widget = GTK_WIDGET (object);
+  GtkWidget *child;
+
+  while ((child = gtk_widget_get_first_child (widget)))
+    gtk_widget_unparent (child);
+
+  G_OBJECT_CLASS (constraints_grid_parent_class)->dispose (object);
+}
+
+static void
+constraints_grid_class_init (ConstraintsGridClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = constraints_grid_dispose;
+}
+
+GtkWidget *
+do_constraints_builder (GtkWidget *do_widget)
+{
+ static GtkWidget *window;
+
+ if (!window)
+   {
+     GtkBuilder *builder;
+
+     g_type_ensure (constraints_grid_get_type ());
+
+     builder = gtk_builder_new_from_resource ("/constraints_builder/constraints_builder.ui");
+
+     window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
+     gtk_window_set_display (GTK_WINDOW (window),
+                             gtk_widget_get_display (do_widget));
+     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+
+     g_object_unref (builder);
+   }
+
+ if (!gtk_widget_get_visible (window))
+   gtk_widget_show (window);
+ else
+   gtk_window_destroy (GTK_WINDOW (window));
+
+ return window;
+}

demos/gtk-demo/constraints_builder.ui

@@ -0,0 +1,460 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <object class="GtkWindow" id="window1">
+    <property name="title" translatable="yes">Constraints — Builder</property>
+    <property name="default-width">260</property>
+    <child>
+      <object class="ConstraintsGrid">
+        <property name="halign">fill</property>
+        <property name="valign">fill</property>
+        <property name="margin-top">10</property>
+        <property name="margin-bottom">10</property>
+        <property name="margin-start">10</property>
+        <property name="margin-end">10</property>
+        <property name="layout-manager">
+          <object class="GtkConstraintLayout">
+            <constraints>
+              <guide name="guide1" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide2" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide3" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide4" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide5" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide6" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide7" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide8" min-width="10" nat-width="200" strength="weak"/>
+              <guide name="guide9" min-width="0" nat-width="200" strength="weak"/>
+              <guide name="guide10" min-width="0" nat-width="200" strength="weak"/>
+              <guide name="barrier1" min-height="10"/>
+              <guide name="barrier2" min-height="10"/>
+              <guide name="barrier3" min-height="10"/>
+              <guide name="barrier4" min-height="10"/>
+
+              <!-- Spread Chain -->
+              <constraint target="super" target-attribute="top"
+                          relation="eq"
+                          source="button1" source-attribute="top"
+                          strength="required"/>
+              <constraint target="super" target-attribute="top"
+                          relation="eq"
+                          source="button2" source-attribute="top"
+                          strength="required"/>
+              <constraint target="super" target-attribute="top"
+                          relation="eq"
+                          source="button3" source-attribute="top"
+                          strength="required"/>
+
+              <constraint target="super" target-attribute="left"
+                          relation="eq"
+                          source="guide1" source-attribute="left"
+                          strength="required"/>
+              <constraint target="button1" target-attribute="left"
+                          relation="eq"
+                          source="guide1" source-attribute="right"
+                          strength="required"/>
+              <constraint target="guide2" target-attribute="left"
+                          relation="eq"
+                          source="button1" source-attribute="right"
+                          strength="required"/>
+              <constraint target="button2" target-attribute="left"
+                          relation="eq"
+                          source="guide2" source-attribute="right"
+                          strength="required"/>
+              <constraint target="guide3" target-attribute="left"
+                          relation="eq"
+                          source="button2" source-attribute="right"
+                          strength="required"/>
+              <constraint target="button3" target-attribute="left"
+                          relation="eq"
+                          source="guide3" source-attribute="right"
+                          strength="required"/>
+              <constraint target="guide4" target-attribute="left"
+                          relation="eq"
+                          source="button3" source-attribute="right"
+                          strength="required"/>
+              <constraint target="super" target-attribute="right"
+                          relation="eq"
+                          source="guide4" source-attribute="right"
+                          strength="required"/>
+
+              <constraint target="guide1" target-attribute="width"
+                          relation="eq"
+                          source="guide2" source-attribute="width"
+                          strength="required"/>
+              <constraint target="guide2" target-attribute="width"
+                          relation="eq"
+                          source="guide3" source-attribute="width"
+                          strength="required"/>
+              <constraint target="guide3" target-attribute="width"
+                          relation="eq"
+                          source="guide4" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button1" target-attribute="width"
+                          relation="eq"
+                          source="button2" source-attribute="width"
+                          strength="required"/>
+              <constraint target="button2" target-attribute="width"
+                          relation="eq"
+                          source="button3" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button1" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier1" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button2" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier1" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button3" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier1" source-attribute="top"
+                          strength="required"/>
+
+              <!-- Spread Inside Chain -->
+
+              <constraint target="super" target-attribute="left"
+                          relation="eq"
+                          source="button4" source-attribute="left"
+                          strength="required"/>
+              <constraint target="guide5" target-attribute="left"
+                          relation="eq"
+                          source="button4" source-attribute="right"
+                          strength="required"/>
+              <constraint target="button5" target-attribute="left"
+                          relation="eq"
+                          source="guide5" source-attribute="right"
+                          strength="required"/>
+              <constraint target="guide6" target-attribute="left"
+                          relation="eq"
+                          source="button5" source-attribute="right"
+                          strength="required"/>
+              <constraint target="button6" target-attribute="left"
+                          relation="eq"
+                          source="guide6" source-attribute="right"
+                          strength="required"/>
+              <constraint target="super" target-attribute="right"
+                          relation="eq"
+                          source="button6" source-attribute="right"
+                          strength="required"/>
+
+              <constraint target="guide5" target-attribute="width"
+                          relation="eq"
+                          source="guide6" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button4" target-attribute="width"
+                          relation="eq"
+                          source="button5" source-attribute="width"
+                          strength="required"/>
+              <constraint target="button5" target-attribute="width"
+                          relation="eq"
+                          source="button6" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button4" target-attribute="top"
+                          relation="eq"
+                          source="barrier1" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button5" target-attribute="top"
+                          relation="eq"
+                          source="barrier1" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button6" target-attribute="top"
+                          relation="eq"
+                          source="barrier1" source-attribute="bottom"
+                          strength="required"/>
+
+              <constraint target="button4" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier2" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button5" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier2" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button6" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier2" source-attribute="top"
+                          strength="required"/>
+
+              <!-- Weighted Chain -->
+
+              <constraint target="super" target-attribute="left"
+                          relation="eq"
+                          source="button7" source-attribute="left"
+                          strength="required"/>
+              <constraint target="button8" target-attribute="left"
+                          relation="eq"
+                          source="button7" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="button9" target-attribute="left"
+                          relation="eq"
+                          source="button8" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="super" target-attribute="right"
+                          relation="eq"
+                          source="button9" source-attribute="right"
+                          strength="required"/>
+
+              <constraint target="button8" target-attribute="width"
+                          relation="eq"
+                          source="button7" source-attribute="width"
+                          multiplier="2"
+                          strength="required"/>
+              <constraint target="button9" target-attribute="width"
+                          relation="eq"
+                          source="button7" source-attribute="width"
+                          multiplier="3"
+                          strength="required"/>
+
+              <constraint target="button7" target-attribute="top"
+                          relation="eq"
+                          source="barrier2" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button8" target-attribute="top"
+                          relation="eq"
+                          source="barrier2" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button9" target-attribute="top"
+                          relation="eq"
+                          source="barrier2" source-attribute="bottom"
+                          strength="required"/>
+
+              <constraint target="button7" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier3" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button8" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier3" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button9" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier3" source-attribute="top"
+                          strength="required"/>
+
+              <!-- Packed Chain -->
+
+              <constraint target="super" target-attribute="left"
+                          relation="eq"
+                          source="guide7" source-attribute="left"
+                          strength="required"/>
+              <constraint target="button10" target-attribute="left"
+                          relation="eq"
+                          source="guide7" source-attribute="right"
+                          strength="required"/>
+              <constraint target="button11" target-attribute="left"
+                          relation="eq"
+                          source="button10" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="button12" target-attribute="left"
+                          relation="eq"
+                          source="button11" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="guide8" target-attribute="left"
+                          relation="eq"
+                          source="button12" source-attribute="right"
+                          strength="required"/>
+              <constraint target="super" target-attribute="right"
+                          relation="eq"
+                          source="guide8" source-attribute="right"
+                          strength="required"/>
+
+              <constraint target="guide7" target-attribute="width"
+                          relation="eq"
+                          source="guide8" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button10" target-attribute="width"
+                          relation="eq"
+                          source="button11" source-attribute="width"
+                          strength="required"/>
+              <constraint target="button11" target-attribute="width"
+                          relation="eq"
+                          source="button12" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button10" target-attribute="top"
+                          relation="eq"
+                          source="barrier3" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button11" target-attribute="top"
+                          relation="eq"
+                          source="barrier3" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button12" target-attribute="top"
+                          relation="eq"
+                          source="barrier3" source-attribute="bottom"
+                          strength="required"/>
+
+              <constraint target="button10" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier4" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button11" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier4" source-attribute="top"
+                          strength="required"/>
+              <constraint target="button12" target-attribute="bottom"
+                          relation="eq"
+                          source="barrier4" source-attribute="top"
+                          strength="required"/>
+
+              <!-- Packed Chain with Bias -->
+
+              <constraint target="super" target-attribute="left"
+                          relation="eq"
+                          source="guide9" source-attribute="left"
+                          strength="required"/>
+              <constraint target="button13" target-attribute="left"
+                          relation="eq"
+                          source="guide9" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="button14" target-attribute="left"
+                          relation="eq"
+                          source="button13" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="button15" target-attribute="left"
+                          relation="eq"
+                          source="button14" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="guide10" target-attribute="left"
+                          relation="eq"
+                          source="button15" source-attribute="right"
+                          constant="10"
+                          strength="required"/>
+              <constraint target="super" target-attribute="right"
+                          relation="eq"
+                          source="guide10" source-attribute="right"
+                          strength="required"/>
+
+              <constraint target="guide9" target-attribute="width"
+                          relation="eq"
+                          source="guide10" source-attribute="width"
+                          multiplier="4"
+                          strength="required"/>
+
+              <constraint target="button13" target-attribute="width"
+                          relation="eq"
+                          source="button14" source-attribute="width"
+                          strength="required"/>
+              <constraint target="button14" target-attribute="width"
+                          relation="eq"
+                          source="button15" source-attribute="width"
+                          strength="required"/>
+
+              <constraint target="button13" target-attribute="top"
+                          relation="eq"
+                          source="barrier4" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button14" target-attribute="top"
+                          relation="eq"
+                          source="barrier4" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="button15" target-attribute="top"
+                          relation="eq"
+                          source="barrier4" source-attribute="bottom"
+                          strength="required"/>
+
+              <constraint target="super" target-attribute="bottom"
+                          relation="ge"
+                          source="button13" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="super" target-attribute="bottom"
+                          relation="ge"
+                          source="button14" source-attribute="bottom"
+                          strength="required"/>
+              <constraint target="super" target-attribute="bottom"
+                          relation="ge"
+                          source="button15" source-attribute="bottom"
+                          strength="required"/>
+            </constraints>
+          </object>
+        </property>
+        <child>
+          <object class="GtkButton" id="button1">
+            <property name="label">A</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button2">
+            <property name="label">B</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button3">
+            <property name="label">C</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button4">
+            <property name="label">A</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button5">
+            <property name="label">B</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button6">
+            <property name="label">C</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button7">
+            <property name="label">A</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button8">
+            <property name="label">B</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button9">
+            <property name="label">C</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button10">
+            <property name="label">A</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button11">
+            <property name="label">B</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button12">
+            <property name="label">C</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button13">
+            <property name="label">A</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button14">
+            <property name="label">B</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button15">
+            <property name="label">C</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

demos/gtk-demo/constraints_interactive.c

@@ -1,7 +1,8 @@
-/* Constraints/Interactive
+/* Constraints/Interactive Constraints
+ * #Keywords: GtkConstraintLayout
  *
- * Demonstrate how constraints can be updates during
- * user interaction.
+ * This example shows how constraints can be updated during user interaction.
+ * The vertical edge between the buttons can be dragged with the mouse.
  */
 
 #include <glib/gi18n.h>
@@ -22,23 +23,24 @@ struct _InteractiveGrid
 G_DEFINE_TYPE (InteractiveGrid, interactive_grid, GTK_TYPE_WIDGET)
 
 static void
-interactive_grid_destroy (GtkWidget *widget)
+interactive_grid_dispose (GObject *object)
 {
-  InteractiveGrid *self = INTERACTIVE_GRID (widget);
+  InteractiveGrid *self = INTERACTIVE_GRID (object);
 
-  g_clear_pointer (&self->button1, gtk_widget_destroy);
-  g_clear_pointer (&self->button2, gtk_widget_destroy);
-  g_clear_pointer (&self->button3, gtk_widget_destroy);
+  g_clear_pointer (&self->button1, gtk_widget_unparent);
+  g_clear_pointer (&self->button2, gtk_widget_unparent);
+  g_clear_pointer (&self->button3, gtk_widget_unparent);
 
-  GTK_WIDGET_CLASS (interactive_grid_parent_class)->destroy (widget);
+  G_OBJECT_CLASS (interactive_grid_parent_class)->dispose (object);
 }
 
 static void
 interactive_grid_class_init (InteractiveGridClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
-  widget_class->destroy = interactive_grid_destroy;
+  object_class->dispose = interactive_grid_dispose;
 
   gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
 }
@@ -203,43 +205,33 @@ interactive_grid_init (InteractiveGrid *self)
 }
 
 GtkWidget *
-do_constraints2 (GtkWidget *do_widget)
+do_constraints_interactive (GtkWidget *do_widget)
 {
  static GtkWidget *window;
 
  if (!window)
    {
-     GtkWidget *header, *box, *grid, *button;
+     GtkWidget *box, *grid;
 
-     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+     window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-
-     header = gtk_header_bar_new ();
-     gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Constraints");
-     gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
-     gtk_window_set_titlebar (GTK_WINDOW (window), header);
-     g_signal_connect (window, "destroy",
-                       G_CALLBACK (gtk_widget_destroyed), &window);
+     gtk_window_set_title (GTK_WINDOW (window), "Interactive Constraints");
+     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
+     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_container_add (GTK_CONTAINER (window), box);
+     gtk_window_set_child (GTK_WINDOW (window), box);
 
      grid = g_object_new (interactive_grid_get_type (), NULL);
      gtk_widget_set_hexpand (grid, TRUE);
      gtk_widget_set_vexpand (grid, TRUE);
-     gtk_container_add (GTK_CONTAINER (box), grid);
-
-     button = gtk_button_new_with_label ("Close");
-     gtk_container_add (GTK_CONTAINER (box), button);
-     gtk_widget_set_hexpand (grid, TRUE);
-     g_signal_connect_swapped (button, "clicked",
-                               G_CALLBACK (gtk_widget_destroy), window);
+     gtk_box_append (GTK_BOX (box), grid);
    }
 
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-   gtk_widget_destroy (window);
+   gtk_window_destroy (GTK_WINDOW (window));
 
  return window;
 }

demos/gtk-demo/constraints_vfl.c

@@ -2,6 +2,10 @@
  *
  * GtkConstraintLayout allows defining constraints using a
  * compact syntax called Visual Format Language, or VFL.
+ *
+ * A typical example of a VFL specification looks like this:
+ *
+ * H:|-[button1(==button2)]-12-[button2]-|
  */
 
 #include <glib/gi18n.h>
@@ -20,23 +24,24 @@ struct _VflGrid
 G_DEFINE_TYPE (VflGrid, vfl_grid, GTK_TYPE_WIDGET)
 
 static void
-vfl_grid_destroy (GtkWidget *widget)
+vfl_grid_dispose (GObject *object)
 {
-  VflGrid *self = VFL_GRID (widget);
+  VflGrid *self = VFL_GRID (object);
 
-  g_clear_pointer (&self->button1, gtk_widget_destroy);
-  g_clear_pointer (&self->button2, gtk_widget_destroy);
-  g_clear_pointer (&self->button3, gtk_widget_destroy);
+  g_clear_pointer (&self->button1, gtk_widget_unparent);
+  g_clear_pointer (&self->button2, gtk_widget_unparent);
+  g_clear_pointer (&self->button3, gtk_widget_unparent);
 
-  GTK_WIDGET_CLASS (vfl_grid_parent_class)->destroy (widget);
+  G_OBJECT_CLASS (vfl_grid_parent_class)->dispose (object);
 }
 
 static void
 vfl_grid_class_init (VflGridClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
-  widget_class->destroy = vfl_grid_destroy;
+  object_class->dispose = vfl_grid_dispose;
 
   gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
 }
@@ -123,43 +128,33 @@ vfl_grid_init (VflGrid *self)
 }
 
 GtkWidget *
-do_constraints3 (GtkWidget *do_widget)
+do_constraints_vfl (GtkWidget *do_widget)
 {
  static GtkWidget *window;
 
  if (!window)
    {
-     GtkWidget *header, *box, *grid, *button;
+     GtkWidget *box, *grid;
 
-     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+     window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-
-     header = gtk_header_bar_new ();
-     gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Constraints");
-     gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
-     gtk_window_set_titlebar (GTK_WINDOW (window), header);
-     g_signal_connect (window, "destroy",
-                       G_CALLBACK (gtk_widget_destroyed), &window);
+     gtk_window_set_title (GTK_WINDOW (window), "Constraints — VFL");
+     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
+     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_container_add (GTK_CONTAINER (window), box);
+     gtk_window_set_child (GTK_WINDOW (window), box);
 
      grid = g_object_new (vfl_grid_get_type (), NULL);
      gtk_widget_set_hexpand (grid, TRUE);
      gtk_widget_set_vexpand (grid, TRUE);
-     gtk_container_add (GTK_CONTAINER (box), grid);
-
-     button = gtk_button_new_with_label ("Close");
-     gtk_container_add (GTK_CONTAINER (box), button);
-     gtk_widget_set_hexpand (grid, TRUE);
-     g_signal_connect_swapped (button, "clicked",
-                               G_CALLBACK (gtk_widget_destroy), window);
+     gtk_box_append (GTK_BOX (box), grid);
    }
 
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-   gtk_widget_destroy (window);
+   gtk_window_destroy (GTK_WINDOW (window));
 
  return window;
 }

demos/gtk-demo/crosswarp.glsl

@@ -0,0 +1,27 @@
+uniform float progress;
+uniform sampler2D u_texture1;
+uniform sampler2D u_texture2;
+
+vec4 getFromColor (vec2 uv) {
+  return GskTexture(u_texture1, uv);
+}
+
+vec4 getToColor (vec2 uv) {
+  return GskTexture(u_texture2, uv);
+}
+
+// Source: https://gl-transitions.com/editor/crosswarp
+// Author: Eke Péter <peterekepeter@gmail.com>
+// License: MIT
+
+vec4 transition(vec2 p) {
+  float x = progress;
+  x=smoothstep(.0,1.0,(x*2.0+p.x-1.0));
+  return mix(getFromColor((p-.5)*(1.-x)+.5), getToColor((p-.5)*x+.5), x);
+}
+
+
+void mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv)
+{
+  fragColor = transition(uv);
+}

demos/gtk-demo/css_accordion.c

@@ -1,7 +1,6 @@
 /* Theming/CSS Accordion
  *
  * A simple accordion demo written using CSS transitions and multiple backgrounds
- *
  */
 
 #include <gtk/gtk.h>
@@ -9,9 +8,13 @@
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
+  GtkWidget *child;
+
   gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  if (GTK_IS_CONTAINER (widget))
-    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    apply_css (child, provider);
 }
 
 GtkWidget *
@@ -24,35 +27,34 @@ do_css_accordion (GtkWidget *do_widget)
       GtkWidget *container, *child;
       GtkStyleProvider *provider;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (window), "CSS Accordion");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
       gtk_window_set_default_size (GTK_WINDOW (window), 600, 300);
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       container = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
       gtk_widget_set_halign (container, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (container, GTK_ALIGN_CENTER);
-      gtk_container_add (GTK_CONTAINER (window), container);
+      gtk_window_set_child (GTK_WINDOW (window), container);
 
       child = gtk_button_new_with_label ("This");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       child = gtk_button_new_with_label ("Is");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       child = gtk_button_new_with_label ("A");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       child = gtk_button_new_with_label ("CSS");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       child = gtk_button_new_with_label ("Accordion");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       child = gtk_button_new_with_label (":-)");
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_box_append (GTK_BOX (container), child);
 
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
       gtk_css_provider_load_from_resource (GTK_CSS_PROVIDER (provider), "/css_accordion/css_accordion.css");
@@ -63,7 +65,7 @@ do_css_accordion (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/css_basics.c

@@ -1,8 +1,7 @@
 /* Theming/CSS Basics
  *
- * Gtk themes are written using CSS. Every widget is build of multiple items
+ * GTK themes are written using CSS. Every widget is build of multiple items
  * that you can style very similarly to a regular website.
- *
  */
 
 #include <gtk/gtk.h>
@@ -55,9 +54,13 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
+  GtkWidget *child;
+
   gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  if (GTK_IS_CONTAINER (widget))
-    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    apply_css (child, provider);
 }
 
 GtkWidget *
@@ -72,12 +75,11 @@ do_css_basics (GtkWidget *do_widget)
       GtkTextBuffer *text;
       GBytes *bytes;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (window), "CSS Basics");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
       gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       text = gtk_text_buffer_new (NULL);
       gtk_text_buffer_create_tag (text,
@@ -91,10 +93,10 @@ do_css_basics (GtkWidget *do_widget)
 
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
 
-      container = gtk_scrolled_window_new (NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (window), container);
+      container = gtk_scrolled_window_new ();
+      gtk_window_set_child (GTK_WINDOW (window), container);
       child = gtk_text_view_new_with_buffer (text);
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
       g_signal_connect (text, "changed",
                         G_CALLBACK (css_text_changed), provider);
 
@@ -113,7 +115,7 @@ do_css_basics (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/css_basics.css

@@ -15,6 +15,10 @@
   border: 1px solid;
 }
 
+window {
+  background-color: white;
+}
+
 /* Make sure selections are visible */
 selection {
   background-color: darkGreen;

demos/gtk-demo/css_blendmodes.c

@@ -11,8 +11,8 @@
  * These are the available blend modes.
  */
 struct {
-  gchar *name;
-  gchar *id;
+  const char *name;
+  const char *id;
 } blend_modes[] =
 {
   { "Color", "color" },
@@ -38,14 +38,14 @@ struct {
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 static void
 update_css_for_blend_mode (GtkCssProvider *provider,
-                           const gchar    *blend_mode)
+                           const char     *blend_mode)
 {
   GBytes *bytes;
-  gchar *css;
+  char *css;
 
   bytes = g_resources_lookup_data ("/css_blendmodes/css_blendmodes.css", 0, NULL);
 
-  css = g_strdup_printf ((gchar*) g_bytes_get_data (bytes, NULL),
+  css = g_strdup_printf ((char *) g_bytes_get_data (bytes, NULL),
                          blend_mode,
                          blend_mode,
                          blend_mode);
@@ -62,7 +62,7 @@ row_activated (GtkListBox     *listbox,
                GtkListBoxRow  *row,
                GtkCssProvider *provider)
 {
-  const gchar *blend_mode;
+  const char *blend_mode;
 
   blend_mode = blend_modes[gtk_list_box_row_get_index (row)].id;
 
@@ -75,11 +75,11 @@ setup_listbox (GtkBuilder       *builder,
 {
   GtkWidget *normal_row;
   GtkWidget *listbox;
-  gint i;
+  int i;
 
   normal_row = NULL;
   listbox = gtk_list_box_new ();
-  gtk_container_add (GTK_CONTAINER (WID ("scrolledwindow")), listbox);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (WID ("scrolledwindow")), listbox);
 
   g_signal_connect (listbox, "row-activated", G_CALLBACK (row_activated), provider);
 
@@ -95,9 +95,8 @@ setup_listbox (GtkBuilder       *builder,
                             "xalign", 0.0,
                             NULL);
 
-      gtk_container_add (GTK_CONTAINER (row), label);
-
-      gtk_container_add (GTK_CONTAINER (listbox), row);
+      gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), label);
+      gtk_list_box_insert (GTK_LIST_BOX (listbox), row, -1);
 
       /* The first selected row is "normal" */
       if (g_strcmp0 (blend_modes[i].id, "normal") == 0)
@@ -125,7 +124,7 @@ do_css_blendmodes (GtkWidget *do_widget)
 
       window = WID ("window");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
-      g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       /* Setup the CSS provider for window */
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
@@ -135,12 +134,14 @@ do_css_blendmodes (GtkWidget *do_widget)
                                                   GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
 
       setup_listbox (builder, provider);
+
+      g_object_unref (builder);
     }
 
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/css_multiplebgs.c

@@ -1,8 +1,7 @@
 /* Theming/Multiple Backgrounds
  *
- * Gtk themes are written using CSS. Every widget is build of multiple items
+ * GTK themes are written using CSS. Every widget is build of multiple items
  * that you can style very similarly to a regular website.
- *
  */
 
 #include <gtk/gtk.h>
@@ -69,9 +68,13 @@ drawing_area_draw (GtkDrawingArea *da,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
+  GtkWidget *child;
+
   gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  if (GTK_IS_CONTAINER (widget))
-    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    apply_css (child, provider);
 }
 
 GtkWidget *
@@ -81,41 +84,40 @@ do_css_multiplebgs (GtkWidget *do_widget)
 
   if (!window)
     {
-      GtkWidget *paned, *container, *child;
+      GtkWidget *paned, *overlay, *child, *sw;
       GtkStyleProvider *provider;
       GtkTextBuffer *text;
       GBytes *bytes;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (window), "Multiple Backgrounds");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
       gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
-      container = gtk_overlay_new ();
-      gtk_container_add (GTK_CONTAINER (window), container);
+      overlay = gtk_overlay_new ();
+      gtk_window_set_child (GTK_WINDOW (window), overlay);
 
       child = gtk_drawing_area_new ();
       gtk_widget_set_name (child, "canvas");
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (child),
                                       drawing_area_draw,
                                       NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_overlay_set_child (GTK_OVERLAY (overlay), child);
 
       child = gtk_button_new ();
-      gtk_overlay_add_overlay (GTK_OVERLAY (container), child);
+      gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
       gtk_widget_set_name (child, "bricks-button");
       gtk_widget_set_halign (child, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
       gtk_widget_set_size_request (child, 250, 84);
 
       paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_overlay_add_overlay (GTK_OVERLAY (container), paned);
+      gtk_overlay_add_overlay (GTK_OVERLAY (overlay), paned);
 
       /* Need a filler so we get a handle */
       child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (paned), child);
+      gtk_paned_set_start_child (GTK_PANED (paned), child);
 
       text = gtk_text_buffer_new (NULL);
       gtk_text_buffer_create_tag (text,
@@ -129,10 +131,10 @@ do_css_multiplebgs (GtkWidget *do_widget)
 
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
 
-      container = gtk_scrolled_window_new (NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (paned), container);
+      sw = gtk_scrolled_window_new ();
+      gtk_paned_set_end_child (GTK_PANED (paned), sw);
       child = gtk_text_view_new_with_buffer (text);
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
       g_signal_connect (text,
                         "changed",
                         G_CALLBACK (css_text_changed),
@@ -153,7 +155,7 @@ do_css_multiplebgs (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/css_pixbufs.c

@@ -1,6 +1,7 @@
 /* Theming/Animated Backgrounds
  *
- * This demo is done in honour of the Pixbufs demo further down.
+ * This demo is in honour of a classic Pixbufs demo.
+ *
  * It is done exclusively with CSS as the background of the window.
  */
 
@@ -55,9 +56,13 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
+  GtkWidget *child;
+
   gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  if (GTK_IS_CONTAINER (widget))
-    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    apply_css (child, provider);
 }
 
 GtkWidget *
@@ -72,19 +77,18 @@ do_css_pixbufs (GtkWidget *do_widget)
       GtkTextBuffer *text;
       GBytes *bytes;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (window), "Animated Backgrounds");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
       gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_container_add (GTK_CONTAINER (window), paned);
+      gtk_window_set_child (GTK_WINDOW (window), paned);
 
       /* Need a filler so we get a handle */
       child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (paned), child);
+      gtk_paned_set_start_child (GTK_PANED (paned), child);
 
       text = gtk_text_buffer_new (NULL);
       gtk_text_buffer_create_tag (text,
@@ -98,10 +102,10 @@ do_css_pixbufs (GtkWidget *do_widget)
 
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
 
-      container = gtk_scrolled_window_new (NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (paned), container);
+      container = gtk_scrolled_window_new ();
+      gtk_paned_set_end_child (GTK_PANED (paned), container);
       child = gtk_text_view_new_with_buffer (text);
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
       g_signal_connect (text, "changed",
                         G_CALLBACK (css_text_changed), provider);
 
@@ -120,7 +124,7 @@ do_css_pixbufs (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/css_pixbufs.css

@@ -46,19 +46,19 @@
 }
 
 @keyframes size-the-image {
-    0% { background-size: 96px, 12px, 96px, 12px, 96px, 12px, 96px, 12px, auto }
-    100% { background-size: 12px, 96px, 12px, 96px, 12px, 96px, 12px, 96px, auto }
+    0% { background-size: 96px, 12px, 96px, 12px, 96px, 12px, 96px, 12px, auto; }
+    100% { background-size: 12px, 96px, 12px, 96px, 12px, 96px, 12px, 96px, auto; }
 }
 
 window {
-    background-image: url("resource://css_pixbufs/apple-red.png"),
-                      url("resource://css_pixbufs/gnome-applets.png"),
-                      url("resource://css_pixbufs/gnome-calendar.png"),
-                      url("resource://css_pixbufs/gnome-foot.png"),
-                      url("resource://css_pixbufs/gnome-gmush.png"),
-                      url("resource://css_pixbufs/gnome-gimp.png"),
-                      url("resource://css_pixbufs/gnome-gsame.png"),
-                      url("resource://css_pixbufs/gnu-keys.png"),
+    background-image: url("resource://css_pixbufs/images/apple-red.png"),
+                      url("resource://css_pixbufs/images/gnome-applets.png"),
+                      url("resource://css_pixbufs/images/gnome-calendar.png"),
+                      url("resource://css_pixbufs/images/gnome-foot.png"),
+                      url("resource://css_pixbufs/images/gnome-gmush.png"),
+                      url("resource://css_pixbufs/images/gnome-gimp.png"),
+                      url("resource://css_pixbufs/images/gnome-gsame.png"),
+                      url("resource://css_pixbufs/images/gnu-keys.png"),
                       url("resource://css_pixbufs/background.jpg");
     background-position: 50.00% 75.00%, 67.68% 67.68%, 75.00% 50.00%, 67.68% 32.32%, 50.00% 25.00%, 32.32% 32.32%, 25.00% 50.00%, 32.32% 67.68%, 0% 0%;
     background-repeat: no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, repeat;

demos/gtk-demo/css_shadows.c

@@ -53,31 +53,32 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
+  GtkWidget *child;
+
   gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  if (GTK_IS_CONTAINER (widget))
-    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    apply_css (child, provider);
 }
 
-GtkWidget *
+static GtkWidget *
 create_toolbar (void)
 {
   GtkWidget *toolbar;
-  GtkToolItem *item;
+  GtkWidget *item;
 
-  toolbar = gtk_toolbar_new ();
+  toolbar = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
   gtk_widget_set_valign (toolbar, GTK_ALIGN_CENTER);
 
-  item = gtk_tool_button_new (NULL, NULL);
-  gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (item), "go-next");
-  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);
+  item = gtk_button_new_from_icon_name ("go-next");
+  gtk_box_append (GTK_BOX (toolbar), item);
 
-  item = gtk_tool_button_new (NULL, NULL);
-  gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (item), "go-previous");
-  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);
+  item = gtk_button_new_from_icon_name ("go-previous");
+  gtk_box_append (GTK_BOX (toolbar), item);
 
-  item = gtk_tool_button_new (NULL, "Hello World");
-  gtk_tool_item_set_is_important (item, TRUE);
-  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);
+  item = gtk_button_new_with_label ("Hello World");
+  gtk_box_append (GTK_BOX (toolbar), item);
 
   return toolbar;
 }
@@ -94,18 +95,18 @@ do_css_shadows (GtkWidget *do_widget)
       GtkTextBuffer *text;
       GBytes *bytes;
 
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_title (GTK_WINDOW (window), "Shadows");
       gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
       gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_container_add (GTK_CONTAINER (window), paned);
+      gtk_window_set_child (GTK_WINDOW (window), paned);
 
       child = create_toolbar ();
-      gtk_container_add (GTK_CONTAINER (paned), child);
+      gtk_paned_set_start_child (GTK_PANED (paned), child);
+      gtk_paned_set_resize_start_child (GTK_PANED (paned), FALSE);
 
       text = gtk_text_buffer_new (NULL);
       gtk_text_buffer_create_tag (text,
@@ -119,10 +120,10 @@ do_css_shadows (GtkWidget *do_widget)
 
       provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
 
-      container = gtk_scrolled_window_new (NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (paned), container);
+      container = gtk_scrolled_window_new ();
+      gtk_paned_set_end_child (GTK_PANED (paned), container);
       child = gtk_text_view_new_with_buffer (text);
-      gtk_container_add (GTK_CONTAINER (container), child);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
       g_signal_connect (text, "changed",
                         G_CALLBACK (css_text_changed), provider);
 
@@ -141,7 +142,7 @@ do_css_shadows (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }

demos/gtk-demo/cursors.c

@@ -1,9 +1,8 @@
 /* Cursors
  *
- * Demonstrates a useful set of available cursors. The cursors shown here are the ones
- * defined by CSS, which we assume to be available.
- *
- * The example shows creating cursors by name or from an image, with or without a fallback.
+ * Demonstrates a useful set of available cursors. The cursors shown here are the
+ * ones defined by CSS, which we assume to be available. The example shows creating
+ * cursors by name or from an image, with or without a fallback.
  */
 
 #include <gtk/gtk.h>
@@ -29,14 +28,14 @@ do_cursors (GtkWidget *do_widget)
                               gtk_widget_get_display (do_widget));
       g_signal_connect (window, "destroy",
                         G_CALLBACK (on_destroy), NULL);
-      g_object_set_data_full (G_OBJECT (window), "builder", builder, g_object_unref);
+      g_object_unref (builder);
     }
 
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
     {
-      gtk_widget_destroy (window);
+      gtk_window_destroy (GTK_WINDOW (window));
     }
 
   return window;

demos/gtk-demo/demo.gresource.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gresources>
+  <gresource prefix="/">
+  </gresource>
   <gresource prefix="/ui">
     <file preprocess="xml-stripblanks">main.ui</file>
-    <file preprocess="xml-stripblanks">appmenu.ui</file>
+    <file preprocess="xml-stripblanks">main-listitem.ui</file>
   </gresource>
   <gresource prefix="/application_demo">
     <file>application.c</file>
@@ -12,6 +14,13 @@
   <gresource prefix="/builder">
     <file>demo.ui</file>
   </gresource>
+  <gresource prefix="/clipboard">
+    <file>demoimage.c</file>
+    <file>demoimage.h</file>
+  </gresource>
+  <gresource prefix="/constraints_builder">
+    <file>constraints_builder.ui</file>
+  </gresource>
   <gresource prefix="/css_accordion">
     <file>css_accordion.css</file>
     <file>reset.css</file>
@@ -34,6 +43,11 @@
     <file>cssview.css</file>
     <file>reset.css</file>
   </gresource>
+  <gresource prefix="/dropdown">
+    <file>suggestionentry.h</file>
+    <file>suggestionentry.c</file>
+    <file>suggestionentry.css</file>
+  </gresource>
   <gresource prefix="/theming_style_classes">
     <file>theming.ui</file>
   </gresource>
@@ -45,6 +59,8 @@
     <file>cssview.css</file>
     <file>reset.css</file>
     <file>background.jpg</file>
+  </gresource>
+  <gresource prefix="/css_pixbufs/images">
     <file>apple-red.png</file>
     <file>gnome-applets.png</file>
     <file>gnome-calendar.png</file>
@@ -61,6 +77,8 @@
   </gresource>
   <gresource prefix="/cursors">
     <file>cursors.ui</file>
+  </gresource>
+  <gresource prefix="/cursors/images">
     <file>alias_cursor.png</file>
     <file>all_scroll_cursor.png</file>
     <file>cell_cursor.png</file>
@@ -99,11 +117,45 @@
     <file>zoom_in_cursor.png</file>
     <file>zoom_out_cursor.png</file>
   </gresource>
+  <gresource prefix="/dnd">
+    <file>dnd.css</file>
+  </gresource>
+  <gresource prefix="/errorstates">
+    <file>errorstates.ui</file>
+  </gresource>
   <gresource prefix="/fishbowl">
     <file>fishbowl.ui</file>
     <file>gtkfishbowl.c</file>
     <file>gtkfishbowl.h</file>
   </gresource>
+  <gresource prefix="/gears">
+    <file>gtkgears.c</file>
+    <file>gtkgears.h</file>
+  </gresource>
+  <gresource prefix="/shadertoy">
+    <file>gtkshadertoy.c</file>
+    <file>gtkshadertoy.h</file>
+    <file>alienplanet.glsl</file>
+    <file>mandelbrot.glsl</file>
+    <file>neon.glsl</file>
+    <file>cogs.glsl</file>
+    <file>glowingstars.glsl</file>
+  </gresource>
+  <gresource prefix="/gltransition">
+    <file>gtkshaderstack.c</file>
+    <file>gtkshaderstack.h</file>
+    <file>gtkshaderbin.h</file>
+    <file>gtkshaderbin.c</file>
+    <file>gskshaderpaintable.h</file>
+    <file>gskshaderpaintable.c</file>
+    <file>wind.glsl</file>
+    <file>radial.glsl</file>
+    <file>crosswarp.glsl</file>
+    <file>kaleidoscope.glsl</file>
+    <file>cogs2.glsl</file>
+    <file>ripple.glsl</file>
+    <file>background.glsl</file>
+  </gresource>
   <gresource prefix="/iconscroll">
     <file>iconscroll.ui</file>
   </gresource>
@@ -111,6 +163,60 @@
     <file>gnome-fs-directory.png</file>
     <file>gnome-fs-regular.png</file>
   </gresource>
+  <gresource prefix="/layoutmanager">
+    <file>demolayout.h</file>
+    <file>demolayout.c</file>
+    <file>demowidget.h</file>
+    <file>demowidget.c</file>
+    <file>demochild.h</file>
+    <file>demochild.c</file>
+  </gresource>
+  <gresource prefix="/layoutmanager2">
+    <file>demo2layout.h</file>
+    <file>demo2layout.c</file>
+    <file>demo2widget.h</file>
+    <file>demo2widget.c</file>
+    <file>four_point_transform.h</file>
+    <file>four_point_transform.c</file>
+    <file>singular_value_decomposition.h</file>
+    <file>singular_value_decomposition.c</file>
+  </gresource>
+  <gresource prefix="/listview_filebrowser">
+    <file>listview_filebrowser.ui</file>
+    <file>listview_filebrowser.css</file>
+  </gresource>
+  <gresource prefix="/listview_minesweeper">
+    <file>listview_minesweeper.ui</file>
+    <file>listview_minesweeper_cell.ui</file>
+  </gresource>
+  <gresource prefix="/listview_settings">
+    <file>listview_settings.ui</file>
+  </gresource>
+  <gresource prefix="/listview_ucd_data/">
+    <file>ucdnames.data</file>
+  </gresource>
+  <gresource prefix="/listview_weather">
+    <file compressed="true">listview_weather.txt</file>
+  </gresource>
+  <gresource prefix="/listview_colors">
+    <file compressed="true">color.names.txt</file>
+    <file>listview_colors.css</file>
+  </gresource>
+  <gresource prefix="/main">
+    <file>fontify.c</file>
+    <file>fontify.h</file>
+    <file>main.ui</file>
+  </gresource>
+  <gresource prefix="/menu">
+    <file>demo3widget.c</file>
+    <file>demo3widget.h</file>
+    <file>demo3widget.ui</file>
+  </gresource>
+  <gresource prefix="/paintable_svg">
+    <file>svgpaintable.h</file>
+    <file>svgpaintable.c</file>
+    <file>org.gtk.gtk4.NodeEditor.Devel.svg</file>
+  </gresource>
   <gresource prefix="/shortcuts">
     <file>shortcuts.ui</file>
     <file>shortcuts-builder.ui</file>
@@ -130,31 +236,26 @@
     <file>revealer.ui</file>
   </gresource>
   <gresource prefix="/images">
+    <file>pixbufpaintable.h</file>
+    <file>pixbufpaintable.c</file>
     <file>alphatest.png</file>
     <file>floppybuddy.gif</file>
     <file>gtk-logo.webm</file>
+    <file alias="org.gtk.Demo4.svg">data/scalable/apps/org.gtk.Demo4.svg</file>
   </gresource>
-  <gresource prefix="/pixbufs">
-    <file>apple-red.png</file>
-    <file>background.jpg</file>
-    <file>gnome-applets.png</file>
-    <file>gnome-calendar.png</file>
-    <file>gnome-foot.png</file>
-    <file>gnome-gmush.png</file>
-    <file>gnome-gimp.png</file>
-    <file>gnome-gsame.png</file>
-    <file>gnu-keys.png</file>
+  <gresource prefix="/video-player">
+    <file>bbb.png</file>
   </gresource>
   <gresource prefix="/sources">
     <file>application_demo.c</file>
     <file>assistant.c</file>
     <file>builder.c</file>
     <file>clipboard.c</file>
-    <file>colorsel.c</file>
     <file>combobox.c</file>
     <file>constraints.c</file>
-    <file>constraints2.c</file>
-    <file>constraints3.c</file>
+    <file>constraints_interactive.c</file>
+    <file>constraints_vfl.c</file>
+    <file>constraints_builder.c</file>
     <file>css_accordion.c</file>
     <file>css_basics.c</file>
     <file>css_blendmodes.c</file>
@@ -164,21 +265,24 @@
     <file>cursors.c</file>
     <file>dialog.c</file>
     <file>drawingarea.c</file>
+    <file>dropdown.c</file>
     <file>dnd.c</file>
     <file>editable_cells.c</file>
     <file>entry_completion.c</file>
     <file>entry_undo.c</file>
+    <file>errorstates.c</file>
     <file>expander.c</file>
     <file>filtermodel.c</file>
     <file>fishbowl.c</file>
     <file>fixed.c</file>
     <file>flowbox.c</file>
-    <file>foreigndrawing.c</file>
     <file>font_features.c</file>
     <file>fontplane.c</file>
     <file>fontrendering.c</file>
+    <file>gears.c</file>
     <file>gestures.c</file>
     <file>glarea.c</file>
+    <file>gltransition.c</file>
     <file>headerbar.c</file>
     <file>hypertext.c</file>
     <file>iconscroll.c</file>
@@ -186,30 +290,46 @@
     <file>iconview_edit.c</file>
     <file>images.c</file>
     <file>infobar.c</file>
+    <file>layoutmanager.c</file>
+    <file>layoutmanager2.c</file>
     <file>links.c</file>
     <file>listbox.c</file>
+    <file>listbox_controls.c</file>
+    <file>listview_applauncher.c</file>
+    <file>listview_colors.c</file>
+    <file>listview_clocks.c</file>
+    <file>listview_filebrowser.c</file>
+    <file>listview_minesweeper.c</file>
+    <file>listview_settings.c</file>
+    <file>listview_ucd.c</file>
+    <file>listview_weather.c</file>
+    <file>listview_words.c</file>
     <file>list_store.c</file>
+    <file>main.c</file>
     <file>markup.c</file>
-    <file>modelbutton.c</file>
+    <file>menu.c</file>
     <file>overlay.c</file>
-    <file>overlay2.c</file>
+    <file>overlay_decorative.c</file>
     <file>paint.c</file>
     <file>pagesetup.c</file>
     <file>paintable.c</file>
     <file>paintable_animated.c</file>
+    <file>paintable_emblem.c</file>
     <file>paintable_mediastream.c</file>
+    <file>paintable_svg.c</file>
     <file>panes.c</file>
     <file>password_entry.c</file>
+    <file>peg_solitaire.c</file>
     <file>pickers.c</file>
-    <file>pixbufs.c</file>
-    <file>popover.c</file>
     <file>printing.c</file>
     <file>revealer.c</file>
     <file>rotated_text.c</file>
     <file>scale.c</file>
     <file>search_entry.c</file>
     <file>search_entry2.c</file>
+    <file>shadertoy.c</file>
     <file>shortcuts.c</file>
+    <file>shortcut_triggers.c</file>
     <file>sizegroup.c</file>
     <file>sidebar.c</file>
     <file>sliding_puzzle.c</file>
@@ -239,8 +359,8 @@
     <file>messages.txt</file>
     <file>apple-red.png</file>
   </gresource>
-  <gresource prefix="/popover">
-    <file>popover.ui</file>
+  <gresource prefix="/listbox_controls">
+    <file>listbox_controls.ui</file>
   </gresource>
   <gresource prefix="/glarea">
     <file>glarea-gl.fs.glsl</file>
@@ -264,6 +384,7 @@
   </gresource>
   <gresource prefix="/transparent">
     <file>portland-rose.jpg</file>
+    <file>bluroverlay.h</file>
     <file>bluroverlay.c</file>
   </gresource>
   <gresource prefix="/markup">
@@ -272,12 +393,6 @@
   <gresource prefix="/scale">
     <file>scale.ui</file>
   </gresource>
-  <gresource prefix="/modelbutton">
-    <file>modelbutton.ui</file>
-  </gresource>
-  <gresource prefix="/dnd">
-    <file>dnd.css</file>
-  </gresource>
   <gresource prefix="/tagged_entry">
     <file>demotaggedentry.c</file>
     <file>demotaggedentry.h</file>
@@ -307,4 +422,7 @@
     <file>icons/16x16/status/battery-caution-charging-symbolic.symbolic.png</file>
     <file>icons/16x16/categories/applications-other.png</file>
   </gresource>
+  <gresource prefix="/org/gtk/Demo4/gtk">
+    <file preprocess="xml-stripblanks">help-overlay.ui</file>
+  </gresource>
 </gresources>

demos/gtk-demo/demo.ui

@@ -29,29 +29,24 @@
         <item>
           <attribute name="label" translatable="yes">_New</attribute>
           <attribute name="action">win.new</attribute>
-          <attribute name="accel">&lt;Primary&gt;n</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">_Open</attribute>
           <attribute name="action">win.open</attribute>
-          <attribute name="accel">&lt;Primary&gt;o</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">_Save</attribute>
           <attribute name="action">win.save</attribute>
-          <attribute name="accel">&lt;Primary&gt;s</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">Save _As</attribute>
           <attribute name="action">win.save-as</attribute>
-          <attribute name="accel">&lt;Primary&gt;q</attribute>
         </item>
       </section>
       <section>
         <item>
           <attribute name="label" translatable="yes">_Quit</attribute>
           <attribute name="action">win.quit</attribute>
-          <attribute name="accel">&lt;Primary&gt;&lt;Shift&gt;s</attribute>
         </item>
       </section>
     </submenu>
@@ -61,17 +56,14 @@
         <item>
           <attribute name="label" translatable="yes">_Copy</attribute>
           <attribute name="action">win.copy</attribute>
-          <attribute name="accel">&lt;Primary&gt;c</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">_Cut</attribute>
           <attribute name="action">win.cut</attribute>
-          <attribute name="accel">&lt;Primary&gt;x</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">_Paste</attribute>
           <attribute name="action">win.paste</attribute>
-          <attribute name="accel">&lt;Primary&gt;v</attribute>
         </item>
       </section>
     </submenu>
@@ -81,22 +73,18 @@
         <item>
           <attribute name="label" translatable="yes">_Help</attribute>
           <attribute name="action">win.help</attribute>
-          <attribute name="accel">F1</attribute>
         </item>
         <item>
           <attribute name="label" translatable="yes">_About</attribute>
           <attribute name="action">win.about</attribute>
-          <attribute name="accel">F7</attribute>
         </item>
       </section>
     </submenu>
   </menu>
   <object class="GtkAboutDialog" id="aboutdialog1">
     <property name="program-name" translatable="yes">Builder demo</property>
-    <property name="logo-icon-name" translatable="yes">gtk3-demo</property>
-    <accessibility>
-      <relation target="window1" type="subwindow-of"/>
-    </accessibility>
+    <property name="logo-icon-name" translatable="yes">org.gtk.Demo4</property>
+    <property name="modal">True</property>
   </object>
   <object class="GtkWindow" id="window1">
     <property name="default-height">250</property>
@@ -108,79 +96,80 @@
         <child>
           <object class="GtkPopoverMenuBar" id="menubar1">
             <property name="menu-model">menubar</property>
+            <accessibility>
+              <property name="label">Main Menu</property>
+            </accessibility>
           </object>
         </child>
         <child>
-          <object class="GtkToolbar" id="toolbar1">
-            <child internal-child="accessible">
-              <object class="AtkObject" id="a11y-toolbar">
-                <property name="AtkObject::accessible-name">The toolbar</property>
-              </object>
-            </child>
+          <object class="GtkBox" id="toolbar1">
+            <property name="accessible-role">toolbar</property>
+            <property name="css-classes">toolbar</property>
+            <accessibility>
+              <property name="label">Toolbar</property>
+            </accessibility>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">New</property>
                 <property name="tooltip-text" translatable="yes">Create a new file</property>
                 <property name="icon-name">document-new</property>
+                <property name="action-name">win.new</property>
               </object>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">Open</property>
                 <property name="tooltip-text" translatable="yes">Open a file</property>
                 <property name="icon-name">document-open</property>
+                <property name="action-name">win.open</property>
               </object>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">Save</property>
                 <property name="tooltip-text" translatable="yes">Save a file</property>
                 <property name="icon-name">document-save</property>
-                <property name="is-important">1</property>
+                <property name="action-name">win.save</property>
               </object>
             </child>
             <child>
-              <object class="GtkSeparatorToolItem"/>
+              <object class="GtkSeparator"/>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">Copy</property>
                 <property name="tooltip-text" translatable="yes">Copy selected object into the clipboard</property>
                 <property name="icon-name">edit-copy</property>
+                <property name="action-name">win.copy</property>
               </object>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">Cut</property>
                 <property name="tooltip-text" translatable="yes">Cut selected object into the clipboard</property>
                 <property name="icon-name">edit-cut</property>
+                <property name="action-name">win.cut</property>
               </object>
             </child>
             <child>
-              <object class="GtkToolButton">
+              <object class="GtkButton">
                 <property name="label" translatable="yes">Paste</property>
                 <property name="tooltip-text" translatable="yes">Paste object from the clipboard</property>
                 <property name="icon-name">edit-paste</property>
+                <property name="action-name">win.paste</property>
               </object>
             </child>
           </object>
         </child>
         <child>
           <object class="GtkScrolledWindow" id="scrolledwindow1">
-            <property name="shadow-type">in</property>
-            <property name="expand">1</property>
+            <property name="has-frame">1</property>
+            <property name="hexpand">1</property>
+            <property name="vexpand">1</property>
             <child>
               <object class="GtkTreeView" id="treeview1">
                 <property name="model">liststore1</property>
                 <property name="tooltip-column">3</property>
-                <child internal-child="accessible">
-                  <object class="AtkObject" id="a11y-treeview">
-                    <property name="AtkObject::accessible-name">Name list</property>
-                    <property name="AtkObject::accessible-description">
-                                    A list of person with name, surname and age columns
-                                  </property>
-                  </object>
-                </child>
                 <child>
                   <object class="GtkTreeViewColumn" id="column1">
                     <property name="title">Name</property>

demos/gtk-demo/demo2layout.c

@@ -0,0 +1,204 @@
+#include "demo2layout.h"
+#include "four_point_transform.h"
+
+struct _Demo2Layout
+{
+  GtkLayoutManager parent_instance;
+
+  float position;
+  float offset;
+};
+
+struct _Demo2LayoutClass
+{
+  GtkLayoutManagerClass parent_class;
+};
+
+G_DEFINE_TYPE (Demo2Layout, demo2_layout, GTK_TYPE_LAYOUT_MANAGER)
+
+static void
+demo2_layout_measure (GtkLayoutManager *layout_manager,
+                      GtkWidget        *widget,
+                      GtkOrientation    orientation,
+                      int               for_size,
+                      int              *minimum,
+                      int              *natural,
+                      int              *minimum_baseline,
+                      int              *natural_baseline)
+{
+  GtkWidget *child;
+  int minimum_size = 0;
+  int natural_size = 0;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      int child_min = 0, child_nat = 0;
+
+      if (!gtk_widget_should_layout (child))
+        continue;
+
+      gtk_widget_measure (child, orientation, -1,
+                          &child_min, &child_nat,
+                          NULL, NULL);
+      minimum_size = MAX (minimum_size, child_min);
+      natural_size = MAX (natural_size, child_nat);
+    }
+
+  *minimum = minimum_size;
+  *natural = 3 * natural_size;
+}
+
+
+#define RADIANS(angle) ((angle)*M_PI/180.0);
+
+/* Spherical coordinates */
+#define SX(r,t,p) ((r) * sin (t) * cos (p))
+#define SZ(r,t,p) ((r) * sin (t) * sin (p))
+#define SY(r,t,p) ((r) * cos (t))
+
+static double
+map_offset (double x)
+{
+  x = fmod (x, 180.0);
+  if (x < 0.0)
+    x += 180.0;
+
+  return x;
+}
+
+static void
+demo2_layout_allocate (GtkLayoutManager *layout_manager,
+                       GtkWidget        *widget,
+                       int               width,
+                       int               height,
+                       int               baseline)
+{
+  GtkWidget *child;
+  GtkRequisition child_req;
+  int i, j, k;
+  float x0, y0;
+  float w, h;
+  graphene_point3d_t p1, p2, p3, p4;
+  graphene_point3d_t q1, q2, q3, q4;
+  double t_1, t_2, p_1, p_2;
+  double r;
+  graphene_matrix_t m;
+  GskTransform *transform;
+  double position = DEMO2_LAYOUT (layout_manager)->position;
+  double offset = DEMO2_LAYOUT (layout_manager)->offset;
+
+  /* for simplicity, assume all children are the same size */
+  gtk_widget_get_preferred_size (gtk_widget_get_first_child (widget), &child_req, NULL);
+  w = child_req.width;
+  h = child_req.height;
+
+  r = 300;
+  x0 = y0 = 300;
+
+  for (child = gtk_widget_get_first_child (widget), i = 0;
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child), i++)
+    {
+      j = i / 36;
+      k = i % 36;
+
+      gtk_widget_set_child_visible (child, FALSE);
+
+      graphene_point3d_init (&p1, w, h, 1.);
+      graphene_point3d_init (&p2, w, 0., 1.);
+      graphene_point3d_init (&p3, 0., 0., 1.);
+      graphene_point3d_init (&p4, 0., h, 1.);
+
+      t_1 = RADIANS (map_offset (offset + 10 * j));
+      t_2 = RADIANS (map_offset (offset + 10 * (j + 1)));
+      p_1 = RADIANS (position + 10 * k);
+      p_2 = RADIANS (position + 10 * (k + 1));
+
+      if (t_2 < t_1)
+        continue;
+
+      if (SZ (r, t_1, p_1) > 0 ||
+          SZ (r, t_2, p_1) > 0 ||
+          SZ (r, t_1, p_2) > 0 ||
+          SZ (r, t_2, p_2) > 0)
+        continue;
+
+      gtk_widget_set_child_visible (child, TRUE);
+
+      graphene_point3d_init (&q1, x0 + SX (r, t_1, p_1), y0 + SY (r, t_1, p_1), SZ (r, t_1, p_1));
+      graphene_point3d_init (&q2, x0 + SX (r, t_2, p_1), y0 + SY (r, t_2, p_1), SZ (r, t_2, p_1));
+      graphene_point3d_init (&q3, x0 + SX (r, t_2, p_2), y0 + SY (r, t_2, p_2), SZ (r, t_2, p_2));
+      graphene_point3d_init (&q4, x0 + SX (r, t_1, p_2), y0 + SY (r, t_1, p_2), SZ (r, t_1, p_2));
+
+      /* Get a matrix that moves p1 -> q1, p2 -> q2, ... */
+      perspective_3d (&p1, &p2, &p3, &p4,
+                      &q1, &q2, &q3, &q4,
+                      &m);
+
+      transform = gsk_transform_matrix (NULL, &m);
+
+      /* Since our matrix was built for transforming points with z = 1,
+       * prepend a translation to the z = 1 plane.
+       */
+      transform = gsk_transform_translate_3d (transform,
+                                              &GRAPHENE_POINT3D_INIT (0, 0, 1));
+
+      gtk_widget_allocate (child, w, h, -1, transform);
+    }
+}
+
+static GtkSizeRequestMode
+demo2_layout_get_request_mode (GtkLayoutManager *layout_manager,
+                               GtkWidget        *widget)
+{
+  return GTK_SIZE_REQUEST_CONSTANT_SIZE;
+}
+
+static void
+demo2_layout_class_init (Demo2LayoutClass *klass)
+{
+  GtkLayoutManagerClass *layout_class = GTK_LAYOUT_MANAGER_CLASS (klass);
+
+  layout_class->get_request_mode = demo2_layout_get_request_mode;
+  layout_class->measure = demo2_layout_measure;
+  layout_class->allocate = demo2_layout_allocate;
+}
+
+static void
+demo2_layout_init (Demo2Layout *self)
+{
+}
+
+GtkLayoutManager *
+demo2_layout_new (void)
+{
+  return g_object_new (DEMO2_TYPE_LAYOUT, NULL);
+}
+
+void
+demo2_layout_set_position (Demo2Layout *layout,
+                           float        position)
+{
+  layout->position = position;
+}
+
+float
+demo2_layout_get_position (Demo2Layout *layout)
+{
+  return layout->position;
+}
+
+void
+demo2_layout_set_offset (Demo2Layout *layout,
+                         float        offset)
+{
+  layout->offset = offset;
+}
+
+float
+demo2_layout_get_offset (Demo2Layout *layout)
+{
+  return layout->offset;
+}

demos/gtk-demo/demo2layout.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO2_TYPE_LAYOUT (demo2_layout_get_type ())
+
+G_DECLARE_FINAL_TYPE (Demo2Layout, demo2_layout, DEMO2, LAYOUT, GtkLayoutManager)
+
+GtkLayoutManager * demo2_layout_new          (void);
+
+void               demo2_layout_set_position (Demo2Layout *layout,
+                                              float        position);
+float              demo2_layout_get_position (Demo2Layout *layout);
+void               demo2_layout_set_offset   (Demo2Layout *layout,
+                                              float        offset);
+float              demo2_layout_get_offset   (Demo2Layout *layout);

demos/gtk-demo/demo2widget.c

@@ -0,0 +1,172 @@
+#include "demo2widget.h"
+#include "demo2layout.h"
+
+struct _Demo2Widget
+{
+  GtkWidget parent_instance;
+
+  gint64 start_time;
+  gint64 end_time;
+  float start_position;
+  float end_position;
+  float start_offset;
+  float end_offset;
+  gboolean animating;
+};
+
+struct _Demo2WidgetClass
+{
+  GtkWidgetClass parent_class;
+};
+
+G_DEFINE_TYPE (Demo2Widget, demo2_widget, GTK_TYPE_WIDGET)
+
+static void
+demo2_widget_init (Demo2Widget *self)
+{
+  gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
+}
+
+static void
+demo2_widget_dispose (GObject *object)
+{
+  GtkWidget *child;
+
+  while ((child = gtk_widget_get_first_child (GTK_WIDGET (object))))
+    gtk_widget_unparent (child);
+
+  G_OBJECT_CLASS (demo2_widget_parent_class)->dispose (object);
+}
+
+/* From clutter-easing.c, based on Robert Penner's
+ * infamous easing equations, MIT license.
+ */
+static double
+ease_out_cubic (double t)
+{
+  double p = t - 1;
+
+  return p * p * p + 1;
+}
+
+static gboolean
+update_position (GtkWidget     *widget,
+                 GdkFrameClock *clock,
+                 gpointer       data)
+{
+  Demo2Widget *self = DEMO2_WIDGET (widget);
+  Demo2Layout *layout = DEMO2_LAYOUT (gtk_widget_get_layout_manager (widget));
+  gint64 now;
+  double t;
+
+  now = gdk_frame_clock_get_frame_time (clock);
+
+  if (now >= self->end_time)
+    {
+      self->animating = FALSE;
+
+      return G_SOURCE_REMOVE;
+    }
+
+  t = (now - self->start_time) / (double) (self->end_time - self->start_time);
+
+  t = ease_out_cubic (t);
+
+  demo2_layout_set_position (layout, self->start_position + t * (self->end_position - self->start_position));
+  demo2_layout_set_offset (layout, self->start_offset + t * (self->end_offset - self->start_offset));
+  gtk_widget_queue_allocate (widget);
+
+  return G_SOURCE_CONTINUE;
+}
+
+static void
+rotate_sphere (GtkWidget  *widget,
+               const char *action,
+               GVariant   *parameters)
+{
+  Demo2Widget *self = DEMO2_WIDGET (widget);
+  Demo2Layout *layout = DEMO2_LAYOUT (gtk_widget_get_layout_manager (widget));
+  GtkOrientation orientation;
+  int direction;
+
+  g_variant_get (parameters, "(ii)", &orientation, &direction);
+
+  self->end_position = self->start_position = demo2_layout_get_position (layout);
+  self->end_offset = self->start_offset = demo2_layout_get_offset (layout);
+  if (orientation == GTK_ORIENTATION_HORIZONTAL)
+    self->end_position += 10 * direction;
+  else
+    self->end_offset += 10 * direction;
+  self->start_time = g_get_monotonic_time ();
+  self->end_time = self->start_time + 0.5 * G_TIME_SPAN_SECOND;
+
+  if (!self->animating)
+    {
+      gtk_widget_add_tick_callback (widget, update_position, NULL, NULL);
+      self->animating = TRUE;
+    }
+}
+
+static void
+demo2_widget_snapshot (GtkWidget   *widget,
+                       GtkSnapshot *snapshot)
+{
+  GtkWidget *child;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      /* our layout manager sets this for children that are out of view */
+      if (!gtk_widget_get_child_visible (child))
+        continue;
+
+      gtk_widget_snapshot_child (widget, child, snapshot);
+    }
+}
+
+static void
+demo2_widget_class_init (Demo2WidgetClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  object_class->dispose = demo2_widget_dispose;
+
+  widget_class->snapshot = demo2_widget_snapshot;
+
+  gtk_widget_class_install_action (widget_class, "rotate", "(ii)", rotate_sphere);
+
+  gtk_widget_class_add_binding_action (widget_class,
+                                       GDK_KEY_Left, 0,
+                                       "rotate",
+                                       "(ii)", GTK_ORIENTATION_HORIZONTAL, -1);
+  gtk_widget_class_add_binding_action (widget_class,
+                                       GDK_KEY_Right, 0,
+                                       "rotate",
+                                       "(ii)", GTK_ORIENTATION_HORIZONTAL, 1);
+  gtk_widget_class_add_binding_action (widget_class,
+                                       GDK_KEY_Up, 0,
+                                       "rotate",
+                                       "(ii)", GTK_ORIENTATION_VERTICAL, 1);
+  gtk_widget_class_add_binding_action (widget_class,
+                                       GDK_KEY_Down, 0,
+                                       "rotate",
+                                       "(ii)", GTK_ORIENTATION_VERTICAL, -1);
+
+  /* here is where we use our custom layout manager */
+  gtk_widget_class_set_layout_manager_type (widget_class, DEMO2_TYPE_LAYOUT);
+}
+
+GtkWidget *
+demo2_widget_new (void)
+{
+  return g_object_new (DEMO2_TYPE_WIDGET, NULL);
+}
+
+void
+demo2_widget_add_child (Demo2Widget *self,
+                        GtkWidget   *child)
+{
+  gtk_widget_set_parent (child, GTK_WIDGET (self));
+}

demos/gtk-demo/demo2widget.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO2_TYPE_WIDGET (demo2_widget_get_type ())
+G_DECLARE_FINAL_TYPE (Demo2Widget, demo2_widget, DEMO2, WIDGET, GtkWidget)
+
+GtkWidget * demo2_widget_new       (void);
+
+void        demo2_widget_add_child (Demo2Widget *self,
+                                    GtkWidget  *child);

demos/gtk-demo/demo3widget.c

@@ -0,0 +1,243 @@
+#include <math.h>
+#include "demo3widget.h"
+
+enum
+{
+  PROP_PAINTABLE = 1,
+  PROP_SCALE
+};
+
+struct _Demo3Widget
+{
+  GtkWidget parent_instance;
+
+  GdkPaintable *paintable;
+  float scale;
+
+  GtkWidget *menu;
+};
+
+struct _Demo3WidgetClass
+{
+  GtkWidgetClass parent_class;
+};
+
+G_DEFINE_TYPE (Demo3Widget, demo3_widget, GTK_TYPE_WIDGET)
+
+static void
+demo3_widget_init (Demo3Widget *self)
+{
+  self->scale = 1.f;
+  gtk_widget_init_template (GTK_WIDGET (self));
+}
+
+static void
+demo3_widget_dispose (GObject *object)
+{
+  Demo3Widget *self = DEMO3_WIDGET (object);
+
+  g_clear_object (&self->paintable);
+  g_clear_pointer (&self->menu, gtk_widget_unparent);
+
+  G_OBJECT_CLASS (demo3_widget_parent_class)->dispose (object);
+}
+
+static void
+demo3_widget_snapshot (GtkWidget   *widget,
+                       GtkSnapshot *snapshot)
+{
+  Demo3Widget *self = DEMO3_WIDGET (widget);
+  int x, y, width, height;
+  double w, h;
+
+  width = gtk_widget_get_width (widget);
+  height = gtk_widget_get_height (widget);
+
+  w = self->scale * gdk_paintable_get_intrinsic_width (self->paintable);
+  h = self->scale * gdk_paintable_get_intrinsic_height (self->paintable);
+
+  x = MAX (0, (width - ceil (w)) / 2);
+  y = MAX (0, (height - ceil (h)) / 2);
+
+  gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT (0, 0, width, height));
+  gtk_snapshot_save (snapshot);
+  gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
+  gdk_paintable_snapshot (self->paintable, snapshot, w, h);
+  gtk_snapshot_restore (snapshot);
+  gtk_snapshot_pop (snapshot);
+}
+
+static void
+demo3_widget_measure (GtkWidget      *widget,
+                      GtkOrientation  orientation,
+                      int             for_size,
+                      int            *minimum,
+                      int            *natural,
+                      int            *minimum_baseline,
+                      int            *natural_baseline)
+{
+  Demo3Widget *self = DEMO3_WIDGET (widget);
+  int size;
+
+  if (orientation == GTK_ORIENTATION_HORIZONTAL)
+    size = gdk_paintable_get_intrinsic_width (self->paintable);
+  else
+    size = gdk_paintable_get_intrinsic_height (self->paintable);
+
+  *minimum = *natural = self->scale * size;
+}
+
+static void
+demo3_widget_size_allocate (GtkWidget *widget,
+                            int        width,
+                            int        height,
+                            int        baseline)
+{
+  Demo3Widget *self = DEMO3_WIDGET (widget);
+
+  /* Since we are not using a layout manager (who would do this
+   * for us), we need to allocate a size for our menu by calling
+   * gtk_popover_present().
+   */
+  gtk_popover_present (GTK_POPOVER (self->menu));
+}
+
+static void
+demo3_widget_set_property (GObject      *object,
+                           guint         prop_id,
+                           const GValue *value,
+                           GParamSpec   *pspec)
+{
+  Demo3Widget *self = DEMO3_WIDGET (object);
+
+  switch (prop_id)
+    {
+    case PROP_PAINTABLE:
+      g_clear_object (&self->paintable);
+      self->paintable = g_value_dup_object (value);
+      gtk_widget_queue_resize (GTK_WIDGET (object));
+      break;
+
+    case PROP_SCALE:
+      self->scale = g_value_get_float (value);
+      gtk_widget_queue_resize (GTK_WIDGET (object));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+demo3_widget_get_property (GObject     *object,
+                           guint        prop_id,
+                           GValue      *value,
+                           GParamSpec  *pspec)
+{
+  Demo3Widget *self = DEMO3_WIDGET (object);
+
+  switch (prop_id)
+    {
+    case PROP_PAINTABLE:
+      g_value_set_object (value, self->paintable);
+      break;
+
+    case PROP_SCALE:
+      g_value_set_float (value, self->scale);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+pressed_cb (GtkGestureClick *gesture,
+            guint            n_press,
+            double           x,
+            double           y,
+            Demo3Widget     *self)
+{
+  /* We are placing our menu at the point where
+   * the click happened, before popping it up.
+   */
+  gtk_popover_set_pointing_to (GTK_POPOVER (self->menu),
+                               &(const GdkRectangle){ x, y, 1, 1 });
+  gtk_popover_popup (GTK_POPOVER (self->menu));
+}
+
+static void
+zoom_cb (GtkWidget  *widget,
+         const char *action_name,
+         GVariant   *parameter)
+{
+  Demo3Widget *self = DEMO3_WIDGET (widget);
+  float scale;
+
+  if (g_str_equal (action_name, "zoom.in"))
+    scale = MIN (10, self->scale * M_SQRT2);
+  else if (g_str_equal (action_name, "zoom.out"))
+    scale = MAX (0.01, self->scale / M_SQRT2);
+  else
+    scale = 1.0;
+
+  gtk_widget_action_set_enabled (widget, "zoom.in", scale < 10);
+  gtk_widget_action_set_enabled (widget, "zoom.out", scale > 0.01);
+  gtk_widget_action_set_enabled (widget, "zoom.reset", scale != 1);
+
+  g_object_set (widget, "scale", scale, NULL);
+}
+
+static void
+demo3_widget_class_init (Demo3WidgetClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  object_class->dispose = demo3_widget_dispose;
+  object_class->set_property = demo3_widget_set_property;
+  object_class->get_property = demo3_widget_get_property;
+
+  widget_class->snapshot = demo3_widget_snapshot;
+  widget_class->measure = demo3_widget_measure;
+  widget_class->size_allocate = demo3_widget_size_allocate;
+
+  g_object_class_install_property (object_class, PROP_PAINTABLE,
+      g_param_spec_object ("paintable", "Paintable", "Paintable",
+                           GDK_TYPE_PAINTABLE,
+                           G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_SCALE,
+      g_param_spec_float ("scale", "Scale", "Scale",
+                          0.0, 10.0, 1.0,
+                          G_PARAM_READWRITE));
+
+  /* These are the actions that we are using in the menu */
+  gtk_widget_class_install_action (widget_class, "zoom.in", NULL, zoom_cb);
+  gtk_widget_class_install_action (widget_class, "zoom.out", NULL, zoom_cb);
+  gtk_widget_class_install_action (widget_class, "zoom.reset", NULL, zoom_cb);
+
+  gtk_widget_class_set_template_from_resource (widget_class, "/menu/demo3widget.ui");
+  gtk_widget_class_bind_template_child (widget_class, Demo3Widget, menu);
+  gtk_widget_class_bind_template_callback (widget_class, pressed_cb);
+}
+
+GtkWidget *
+demo3_widget_new (const char *resource)
+{
+  Demo3Widget *self;
+  GdkPixbuf *pixbuf;
+  GdkPaintable *paintable;
+
+  pixbuf = gdk_pixbuf_new_from_resource (resource, NULL);
+  paintable = GDK_PAINTABLE (gdk_texture_new_for_pixbuf (pixbuf));
+
+  self = g_object_new (DEMO3_TYPE_WIDGET, "paintable", paintable, NULL);
+
+  g_object_unref (pixbuf);
+  g_object_unref (paintable);
+
+  return GTK_WIDGET (self);
+}

demos/gtk-demo/demo3widget.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO3_TYPE_WIDGET (demo3_widget_get_type ())
+G_DECLARE_FINAL_TYPE (Demo3Widget, demo3_widget, DEMO3, WIDGET, GtkWidget)
+
+GtkWidget * demo3_widget_new (const char *resource);

demos/gtk-demo/demo3widget.ui

@@ -0,0 +1,30 @@
+<interface>
+  <menu id="model">
+    <item>
+      <attribute name="label">Zoom Out</attribute>
+      <attribute name="action">zoom.out</attribute>
+    </item>
+    <item>
+      <attribute name="label">Zoom In</attribute>
+      <attribute name="action">zoom.in</attribute>
+    </item>
+    <item>
+      <attribute name="label">1∶1</attribute>
+      <attribute name="action">zoom.reset</attribute>
+    </item>
+  </menu>
+  <template class="Demo3Widget">
+    <child>
+      <object class="GtkPopoverMenu" id="menu">
+        <property name="has-arrow">0</property>
+        <property name="menu-model">model</property>
+      </object>
+    </child>
+    <child>
+      <object class="GtkGestureClick">
+        <property name="button">3</property>
+        <signal name="pressed" handler="pressed_cb"/>
+      </object>
+    </child>
+  </template>
+</interface>

demos/gtk-demo/demochild.c

@@ -0,0 +1,72 @@
+#include "demochild.h"
+
+/* This is a trivial child widget just for demo purposes.
+ * It draws a 32x32 square in fixed color.
+ */
+
+struct _DemoChild
+{
+  GtkWidget parent_instance;
+  GdkRGBA color;
+};
+
+struct _DemoChildClass
+{
+  GtkWidgetClass parent_class;
+};
+
+G_DEFINE_TYPE (DemoChild, demo_child, GTK_TYPE_WIDGET)
+
+static void
+demo_child_init (DemoChild *self)
+{
+}
+
+static void
+demo_child_snapshot (GtkWidget   *widget,
+                     GtkSnapshot *snapshot)
+{
+  DemoChild *self = DEMO_CHILD (widget);
+  int width, height;
+
+  width = gtk_widget_get_width (widget);
+  height = gtk_widget_get_height (widget);
+
+  gtk_snapshot_append_color (snapshot, &self->color,
+                             &GRAPHENE_RECT_INIT(0, 0, width, height));
+}
+
+static void
+demo_child_measure (GtkWidget        *widget,
+                    GtkOrientation    orientation,
+                    int               for_size,
+                    int              *minimum,
+                    int              *natural,
+                    int              *minimum_baseline,
+                    int              *natural_baseline)
+{
+  *minimum = *natural = 32;
+}
+
+static void
+demo_child_class_init (DemoChildClass *class)
+{
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  widget_class->snapshot = demo_child_snapshot;
+  widget_class->measure = demo_child_measure;
+}
+
+GtkWidget *
+demo_child_new (const char *color)
+{
+  DemoChild *self;
+
+  self = g_object_new (DEMO_TYPE_CHILD,
+                       "tooltip-text", color,
+                       NULL);
+
+  gdk_rgba_parse (&self->color, color);
+
+  return GTK_WIDGET (self);
+}

demos/gtk-demo/demochild.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO_TYPE_CHILD (demo_child_get_type ())
+G_DECLARE_FINAL_TYPE (DemoChild, demo_child, DEMO, CHILD, GtkWidget)
+
+GtkWidget * demo_child_new (const char *color);

demos/gtk-demo/demoimage.c

@@ -0,0 +1,285 @@
+#include "demoimage.h"
+#include <glib/gi18n.h>
+
+struct _DemoImage {
+  GtkWidget parent_instance;
+ 
+  GtkWidget *image;
+  GtkWidget *popover;
+};
+
+enum {
+  PROP_ICON_NAME = 1
+};
+
+G_DEFINE_TYPE(DemoImage, demo_image, GTK_TYPE_WIDGET)
+
+static GdkPaintable *
+get_image_paintable (GtkImage *image)
+{
+  const char *icon_name;
+  GtkIconTheme *icon_theme;
+  GtkIconPaintable *icon;
+
+  switch (gtk_image_get_storage_type (image))
+    {
+    case GTK_IMAGE_PAINTABLE:
+      return g_object_ref (gtk_image_get_paintable (image));
+    case GTK_IMAGE_ICON_NAME:
+      icon_name = gtk_image_get_icon_name (image);
+      icon_theme = gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (image)));
+      icon = gtk_icon_theme_lookup_icon (icon_theme,
+                                         icon_name,
+                                         NULL,
+                                         48, 1,
+                                         gtk_widget_get_direction (GTK_WIDGET (image)),
+                                         0);
+      if (icon == NULL)
+        return NULL;
+      return GDK_PAINTABLE (icon);
+
+    case GTK_IMAGE_EMPTY:
+    case GTK_IMAGE_GICON:
+    default:
+      g_warning ("Image storage type %d not handled",
+                 gtk_image_get_storage_type (image));
+      return NULL;
+    }
+}
+
+static void
+update_drag_icon (DemoImage   *demo,
+                  GtkDragIcon *icon)
+{
+  const char *icon_name;
+  GdkPaintable *paintable;
+  GtkWidget *image;
+
+  switch (gtk_image_get_storage_type (GTK_IMAGE (demo->image)))
+    {
+    case GTK_IMAGE_PAINTABLE:
+      paintable = gtk_image_get_paintable (GTK_IMAGE (demo->image));
+      image = gtk_image_new_from_paintable (paintable);
+      break;
+    case GTK_IMAGE_ICON_NAME:
+      icon_name = gtk_image_get_icon_name (GTK_IMAGE (demo->image));
+      image = gtk_image_new_from_icon_name (icon_name);
+      break;
+    case GTK_IMAGE_EMPTY:
+    case GTK_IMAGE_GICON:
+    default:
+      g_warning ("Image storage type %d not handled",
+                 gtk_image_get_storage_type (GTK_IMAGE (demo->image)));
+      return;
+    }
+
+  gtk_image_set_pixel_size (GTK_IMAGE (image),
+                            gtk_image_get_pixel_size (GTK_IMAGE (demo->image)));
+
+  gtk_drag_icon_set_child (icon, image);
+}
+
+static void
+drag_begin (GtkDragSource *source,
+            GdkDrag       *drag,
+            gpointer       data)
+{
+  GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  DemoImage *demo = DEMO_IMAGE (widget);
+
+  update_drag_icon (demo, GTK_DRAG_ICON (gtk_drag_icon_get_for_drag (drag)));
+}
+
+static GdkContentProvider *
+prepare_drag (GtkDragSource *source,
+              double         x,
+              double         y,
+              gpointer       data)
+{
+  GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  DemoImage *demo = DEMO_IMAGE (widget);
+  GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
+
+  return gdk_content_provider_new_typed (GDK_TYPE_PAINTABLE, paintable);
+}
+
+static gboolean
+drag_drop (GtkDropTarget *dest,
+           const GValue  *value,
+           double         x,
+           double         y,
+           gpointer       data)
+{
+  GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
+  DemoImage *demo = DEMO_IMAGE (widget);
+  GdkPaintable *paintable = g_value_get_object (value);
+
+  gtk_image_set_from_paintable (GTK_IMAGE (demo->image), paintable);
+
+  return TRUE;
+}
+
+static void
+copy_image (GtkWidget *widget,
+            const char *action_name,
+            GVariant *parameter)
+{
+  GdkClipboard *clipboard = gtk_widget_get_clipboard (widget);
+  DemoImage *demo = DEMO_IMAGE (widget);
+  GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
+  GValue value = G_VALUE_INIT;
+
+  g_value_init (&value, GDK_TYPE_PAINTABLE);
+  g_value_set_object (&value, paintable);
+  gdk_clipboard_set_value (clipboard, &value);
+  g_value_unset (&value);
+
+  if (paintable)
+    g_object_unref (paintable);
+}
+
+static void
+paste_image (GtkWidget *widget,
+             const char *action_name,
+             GVariant *parameter)
+{
+  GdkClipboard *clipboard = gtk_widget_get_clipboard (widget);
+  DemoImage *demo = DEMO_IMAGE (widget);
+  GdkContentProvider *content = gdk_clipboard_get_content (clipboard);
+  GValue value = G_VALUE_INIT;
+  GdkPaintable *paintable;
+
+  g_value_init (&value, GDK_TYPE_PAINTABLE);
+  if (!gdk_content_provider_get_value (content, &value, NULL))
+    return;
+
+  paintable = GDK_PAINTABLE (g_value_get_object (&value));
+  gtk_image_set_from_paintable (GTK_IMAGE (demo->image), paintable);
+  g_value_unset (&value);
+}
+
+static void
+pressed_cb (GtkGesture *gesture,
+            int         n_press,
+            double      x,
+            double      y,
+            gpointer    data)
+{
+  DemoImage *demo = DEMO_IMAGE (gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)));
+
+  gtk_popover_popup (GTK_POPOVER (demo->popover));
+}
+
+static void
+demo_image_init (DemoImage *demo)
+{
+  GMenu *menu;
+  GMenuItem *item;
+  GtkDragSource *source;
+  GtkDropTarget *dest;
+  GtkGesture *gesture;
+
+  demo->image = gtk_image_new ();
+  gtk_image_set_pixel_size (GTK_IMAGE (demo->image), 48);
+  gtk_widget_set_parent (demo->image, GTK_WIDGET (demo));
+
+  menu = g_menu_new (); 
+  item = g_menu_item_new (_("_Copy"), "clipboard.copy");
+  g_menu_append_item (menu, item);
+
+  item = g_menu_item_new (_("_Paste"), "clipboard.paste");
+  g_menu_append_item (menu, item);
+
+  demo->popover = gtk_popover_menu_new_from_model (G_MENU_MODEL (menu));
+  gtk_widget_set_parent (demo->popover, GTK_WIDGET (demo));
+
+  source = gtk_drag_source_new ();
+  g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
+  g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
+  gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (source));
+
+  dest = gtk_drop_target_new (GDK_TYPE_PAINTABLE, GDK_ACTION_COPY);
+  g_signal_connect (dest, "drop", G_CALLBACK (drag_drop), NULL);
+  gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (dest));
+
+  gesture = gtk_gesture_click_new ();
+  gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
+  g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), NULL);
+  gtk_widget_add_controller (GTK_WIDGET (demo), GTK_EVENT_CONTROLLER (gesture));
+}
+
+static void
+demo_image_dispose (GObject *object)
+{
+  DemoImage *demo = DEMO_IMAGE (object);
+
+  g_clear_pointer (&demo->image, gtk_widget_unparent);
+  g_clear_pointer (&demo->popover, gtk_widget_unparent);
+
+  G_OBJECT_CLASS (demo_image_parent_class)->dispose (object);
+}
+
+static void
+demo_image_get_property (GObject    *object,
+                         guint       prop_id,
+                         GValue     *value,
+                         GParamSpec *pspec)
+{
+  DemoImage *demo = DEMO_IMAGE (object);
+
+  switch (prop_id)
+    {
+    case PROP_ICON_NAME:
+      g_value_set_string (value, gtk_image_get_icon_name (GTK_IMAGE (demo->image)));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+demo_image_set_property (GObject      *object,
+                         guint         prop_id,
+                         const GValue *value,
+                         GParamSpec   *pspec)
+{
+  DemoImage *demo = DEMO_IMAGE (object);
+
+  switch (prop_id)
+    {
+    case PROP_ICON_NAME:
+      gtk_image_set_from_icon_name (GTK_IMAGE (demo->image),
+                                    g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+demo_image_class_init (DemoImageClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  object_class->dispose = demo_image_dispose;
+  object_class->get_property = demo_image_get_property;
+  object_class->set_property = demo_image_set_property;
+
+  g_object_class_install_property (object_class, PROP_ICON_NAME,
+      g_param_spec_string ("icon-name", "Icon name", "Icon name",
+                           NULL, G_PARAM_READWRITE));
+                       
+  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
+
+  gtk_widget_class_install_action (widget_class, "clipboard.copy", NULL, copy_image);
+  gtk_widget_class_install_action (widget_class, "clipboard.paste", NULL, paste_image);
+}
+
+GtkWidget *
+demo_image_new (const char *icon_name)
+{
+  return g_object_new (DEMO_TYPE_IMAGE, "icon-name", icon_name, NULL);
+}

demos/gtk-demo/demoimage.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define DEMO_TYPE_IMAGE (demo_image_get_type ())
+
+G_DECLARE_FINAL_TYPE(DemoImage, demo_image, DEMO, IMAGE, GtkWidget)
+
+GtkWidget * demo_image_new (const char *icon_name);
+
+G_END_DECLS

demos/gtk-demo/demolayout.c

@@ -0,0 +1,189 @@
+#include "demolayout.h"
+
+struct _DemoLayout
+{
+  GtkLayoutManager parent_instance;
+
+  float position;
+  int pos[16];
+};
+
+struct _DemoLayoutClass
+{
+  GtkLayoutManagerClass parent_class;
+};
+
+G_DEFINE_TYPE (DemoLayout, demo_layout, GTK_TYPE_LAYOUT_MANAGER)
+
+static void
+demo_layout_measure (GtkLayoutManager *layout_manager,
+                     GtkWidget        *widget,
+                     GtkOrientation    orientation,
+                     int               for_size,
+                     int              *minimum,
+                     int              *natural,
+                     int              *minimum_baseline,
+                     int              *natural_baseline)
+{
+  GtkWidget *child;
+  int minimum_size = 0;
+  int natural_size = 0;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      int child_min = 0, child_nat = 0;
+
+      if (!gtk_widget_should_layout (child))
+        continue;
+
+      gtk_widget_measure (child, orientation, -1,
+                          &child_min, &child_nat,
+                          NULL, NULL);
+      minimum_size = MAX (minimum_size, child_min);
+      natural_size = MAX (natural_size, child_nat);
+    }
+
+  /* A back-of-a-napkin calculation to reserve enough
+   * space for arranging 16 children in a circle.
+   */
+  *minimum = 16 * minimum_size / G_PI + minimum_size;
+  *natural = 16 * natural_size / G_PI + natural_size;
+}
+
+static void
+demo_layout_allocate (GtkLayoutManager *layout_manager,
+                      GtkWidget        *widget,
+                      int               width,
+                      int               height,
+                      int               baseline)
+{
+  DemoLayout *self = DEMO_LAYOUT (layout_manager);
+  GtkWidget *child;
+  int i;
+  int child_width = 0;
+  int child_height = 0;
+  int x0, y0;
+  float r;
+  float t;
+
+  t = self->position;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      GtkRequisition child_req;
+
+      if (!gtk_widget_should_layout (child))
+        continue;
+
+      gtk_widget_get_preferred_size (child, &child_req, NULL);
+
+      child_width = MAX (child_width, child_req.width);
+      child_height = MAX (child_height, child_req.height);
+    }
+
+  /* the center of our layout */
+  x0 = (width / 2);
+  y0 = (height / 2);
+
+  /* the radius for our circle of children */
+  r = 8 * child_width / G_PI;
+
+  for (child = gtk_widget_get_first_child (widget), i = 0;
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child), i++)
+    {
+      GtkRequisition child_req;
+      float a = self->pos[i] * G_PI / 8;
+      int gx, gy;
+      int cx, cy;
+      int x, y;
+
+      if (!gtk_widget_should_layout (child))
+        continue;
+
+      gtk_widget_get_preferred_size (child, &child_req, NULL);
+
+      /* The grid position of child. */
+      gx = x0 + (i % 4 - 2) * child_width;
+      gy = y0 + (i / 4 - 2) * child_height;
+
+      /* The circle position of child. Note that we
+       * are adjusting the position by half the child size
+       * to place the center of child on a centered circle.
+       * This assumes that the children don't use align flags
+       * or uneven margins that would shift the center.
+       */
+      cx = x0 + sin (a) * r - child_req.width / 2;
+      cy = y0 + cos (a) * r - child_req.height / 2;
+
+      /* we interpolate between the two layouts according to
+       * the position value that has been set on the layout.
+       */
+      x = t * cx + (1 - t) * gx;
+      y = t * cy + (1 - t) * gy;
+
+      gtk_widget_size_allocate (child,
+                                &(const GtkAllocation){ x, y, child_width, child_height},
+                                -1);
+    }
+}
+
+static GtkSizeRequestMode
+demo_layout_get_request_mode (GtkLayoutManager *layout_manager,
+                              GtkWidget        *widget)
+{
+  return GTK_SIZE_REQUEST_CONSTANT_SIZE;
+}
+
+static void
+demo_layout_class_init (DemoLayoutClass *klass)
+{
+  GtkLayoutManagerClass *layout_class = GTK_LAYOUT_MANAGER_CLASS (klass);
+
+  layout_class->get_request_mode = demo_layout_get_request_mode;
+  layout_class->measure = demo_layout_measure;
+  layout_class->allocate = demo_layout_allocate;
+}
+
+static void
+demo_layout_init (DemoLayout *self)
+{
+  int i;
+
+  for (i = 0; i < 16; i++)
+    self->pos[i] = i;
+}
+
+GtkLayoutManager *
+demo_layout_new (void)
+{
+  return g_object_new (DEMO_TYPE_LAYOUT, NULL);
+}
+
+void
+demo_layout_set_position (DemoLayout *layout,
+                          float       position)
+{
+  layout->position = position;
+}
+
+/* Shuffle the circle positions of the children.
+ * Should be called when we are in the grid layout.
+ */
+void
+demo_layout_shuffle (DemoLayout *layout)
+{
+  int i, j, tmp;
+
+  for (i = 0; i < 16; i++)
+    {
+      j = g_random_int_range (0, i + 1);
+      tmp = layout->pos[i];
+      layout->pos[i] = layout->pos[j];
+      layout->pos[j] = tmp;
+    }
+}

demos/gtk-demo/demolayout.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO_TYPE_LAYOUT (demo_layout_get_type ())
+
+G_DECLARE_FINAL_TYPE (DemoLayout, demo_layout, DEMO, LAYOUT, GtkLayoutManager)
+
+GtkLayoutManager * demo_layout_new          (void);
+
+void               demo_layout_set_position (DemoLayout *layout,
+                                             float       position);
+void               demo_layout_shuffle      (DemoLayout *layout);

demos/gtk-demo/demotaggedentry.c

@@ -23,57 +23,63 @@
 #include "demotaggedentry.h"
 
 #include <gtk/gtk.h>
-#include <gtk/gtk-a11y.h>
 
-typedef struct {
-  GtkWidget *box;
-  GtkWidget *entry;
-} DemoTaggedEntryPrivate;
+struct _DemoTaggedEntry
+{
+  GtkWidget parent_instance;
+
+  GtkWidget *text;
+};
+
+struct _DemoTaggedEntryClass
+{
+  GtkWidgetClass parent_class;
+};
 
 static void demo_tagged_entry_editable_init (GtkEditableInterface *iface);
 
 G_DEFINE_TYPE_WITH_CODE (DemoTaggedEntry, demo_tagged_entry, GTK_TYPE_WIDGET,
-                         G_ADD_PRIVATE (DemoTaggedEntry)
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE, demo_tagged_entry_editable_init))
 
 static void
 demo_tagged_entry_init (DemoTaggedEntry *entry)
 {
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
+  GtkCssProvider *provider;
 
-  priv->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
-  gtk_widget_set_parent (priv->box, GTK_WIDGET (entry));
-
-  priv->entry = gtk_text_new ();
-  gtk_widget_set_hexpand (priv->entry, TRUE);
-  gtk_widget_set_vexpand (priv->entry, TRUE);
-  gtk_widget_set_hexpand (priv->box, FALSE);
-  gtk_widget_set_vexpand (priv->box, FALSE);
-  gtk_container_add (GTK_CONTAINER (priv->box), priv->entry);
+  entry->text = gtk_text_new ();
+  gtk_widget_set_hexpand (entry->text, TRUE);
+  gtk_widget_set_vexpand (entry->text, TRUE);
+  gtk_widget_set_parent (entry->text, GTK_WIDGET (entry));
   gtk_editable_init_delegate (GTK_EDITABLE (entry));
+  gtk_editable_set_width_chars (GTK_EDITABLE (entry->text), 6);
+  gtk_editable_set_max_width_chars (GTK_EDITABLE (entry->text), 6);
+  gtk_widget_add_css_class (GTK_WIDGET (entry), "tagged");
+
+  provider = gtk_css_provider_new ();
+  gtk_css_provider_load_from_resource (provider, "/tagged_entry/tagstyle.css");
+  gtk_style_context_add_provider_for_display (gdk_display_get_default (),
+                                              GTK_STYLE_PROVIDER (provider),
+                                              800);
+  g_object_unref (provider);
 }
 
 static void
 demo_tagged_entry_dispose (GObject *object)
 {
   DemoTaggedEntry *entry = DEMO_TAGGED_ENTRY (object);
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
+  GtkWidget *child;
 
-  if (priv->entry)
+  if (entry->text)
     gtk_editable_finish_delegate (GTK_EDITABLE (entry));
 
-  g_clear_pointer (&priv->entry, gtk_widget_unparent);
-  g_clear_pointer (&priv->box, gtk_widget_unparent);
+  while ((child = gtk_widget_get_first_child (GTK_WIDGET (entry))))
+    gtk_widget_unparent (child);
+
+  entry->text = NULL;
 
   G_OBJECT_CLASS (demo_tagged_entry_parent_class)->dispose (object);
 }
 
-static void
-demo_tagged_entry_finalize (GObject *object)
-{
-  G_OBJECT_CLASS (demo_tagged_entry_parent_class)->finalize (object);
-}
-
 static void
 demo_tagged_entry_set_property (GObject      *object,
                                 guint         prop_id,
@@ -98,44 +104,12 @@ demo_tagged_entry_get_property (GObject    *object,
   G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 }
 
-static void
-demo_tagged_entry_measure (GtkWidget      *widget,
-                           GtkOrientation  orientation,
-                           int             for_size,
-                           int            *minimum,
-                           int            *natural,
-                           int            *minimum_baseline,
-                           int            *natural_baseline)
-{
-  DemoTaggedEntry *entry = DEMO_TAGGED_ENTRY (widget);
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
-  gtk_widget_measure (priv->box, orientation, for_size,
-                      minimum, natural,
-                      minimum_baseline, natural_baseline);
-}
-
-static void
-demo_tagged_entry_size_allocate (GtkWidget *widget,
-                                 int        width,
-                                 int        height,
-                                 int        baseline)
-{
-  DemoTaggedEntry *entry = DEMO_TAGGED_ENTRY (widget);
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
-  gtk_widget_size_allocate (priv->box,
-                            &(GtkAllocation) { 0, 0, width, height },
-                            baseline);
-}
-
 static gboolean
 demo_tagged_entry_grab_focus (GtkWidget *widget)
 {
   DemoTaggedEntry *entry = DEMO_TAGGED_ENTRY (widget);
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
 
-  return gtk_widget_grab_focus (priv->entry);
+  return gtk_widget_grab_focus (entry->text);
 }
 
 static void
@@ -145,27 +119,22 @@ demo_tagged_entry_class_init (DemoTaggedEntryClass *klass)
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->dispose = demo_tagged_entry_dispose;
-  object_class->finalize = demo_tagged_entry_finalize;
   object_class->get_property = demo_tagged_entry_get_property;
   object_class->set_property = demo_tagged_entry_set_property;
 
-  widget_class->measure = demo_tagged_entry_measure;
-  widget_class->size_allocate = demo_tagged_entry_size_allocate;
   widget_class->grab_focus = demo_tagged_entry_grab_focus;
- 
+
   gtk_editable_install_properties (object_class, 1);
 
-  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_ENTRY_ACCESSIBLE);
+  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BOX_LAYOUT);
   gtk_widget_class_set_css_name (widget_class, "entry");
+  gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_TEXT_BOX);
 }
 
 static GtkEditable *
 demo_tagged_entry_get_delegate (GtkEditable *editable)
 {
-  DemoTaggedEntry *entry = DEMO_TAGGED_ENTRY (editable);
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
-  return GTK_EDITABLE (priv->entry);
+  return GTK_EDITABLE (DEMO_TAGGED_ENTRY (editable)->text);
 }
 
 static void
@@ -184,11 +153,9 @@ void
 demo_tagged_entry_add_tag (DemoTaggedEntry *entry,
                            GtkWidget       *tag)
 {
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
   g_return_if_fail (DEMO_IS_TAGGED_ENTRY (entry));
 
-  gtk_container_add (GTK_CONTAINER (priv->box), tag);
+  gtk_widget_set_parent (tag, GTK_WIDGET (entry));
 }
 
 void
@@ -196,30 +163,24 @@ demo_tagged_entry_insert_tag_after (DemoTaggedEntry *entry,
                                     GtkWidget       *tag,
                                     GtkWidget       *sibling)
 {
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
   g_return_if_fail (DEMO_IS_TAGGED_ENTRY (entry));
 
-  if (sibling == NULL)
-    gtk_container_add (GTK_CONTAINER (priv->box), tag);
-  else
-    gtk_box_insert_child_after (GTK_BOX (priv->box), tag, sibling); 
+  gtk_widget_insert_after (tag, GTK_WIDGET (entry), sibling);
 }
 
 void
 demo_tagged_entry_remove_tag (DemoTaggedEntry *entry,
                               GtkWidget       *tag)
 {
-  DemoTaggedEntryPrivate *priv = demo_tagged_entry_get_instance_private (entry);
-
   g_return_if_fail (DEMO_IS_TAGGED_ENTRY (entry));
 
-  gtk_container_remove (GTK_CONTAINER (priv->box), tag);
+  gtk_widget_unparent (tag);
 }
 
 struct _DemoTaggedEntryTag
 {
   GtkWidget parent;
+
   GtkWidget *box;
   GtkWidget *label;
   GtkWidget *button;
@@ -250,11 +211,11 @@ static guint signals[LAST_SIGNAL] = { 0, };
 G_DEFINE_TYPE (DemoTaggedEntryTag, demo_tagged_entry_tag, GTK_TYPE_WIDGET)
 
 static void
-on_released (GtkGestureClick      *gesture,
-             int                   n_press,
-             double                x,
-             double                y,
-             DemoTaggedEntryTag   *tag)
+on_released (GtkGestureClick    *gesture,
+             int                 n_press,
+             double              x,
+             double              y,
+             DemoTaggedEntryTag *tag)
 {
   g_signal_emit (tag, signals[SIGNAL_CLICKED], 0);
 }
@@ -263,23 +224,15 @@ static void
 demo_tagged_entry_tag_init (DemoTaggedEntryTag *tag)
 {
   GtkGesture *gesture;
-  GtkCssProvider *provider;
 
   tag->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
   gtk_widget_set_parent (tag->box, GTK_WIDGET (tag));
   tag->label = gtk_label_new ("");
-  gtk_container_add (GTK_CONTAINER (tag->box), tag->label);
+  gtk_box_append (GTK_BOX (tag->box), tag->label);
 
   gesture = gtk_gesture_click_new ();
   g_signal_connect (gesture, "released", G_CALLBACK (on_released), tag);
   gtk_widget_add_controller (GTK_WIDGET (tag), GTK_EVENT_CONTROLLER (gesture));
-
-  provider = gtk_css_provider_new ();
-  gtk_css_provider_load_from_resource (provider, "/tagged_entry/tagstyle.css");
-  gtk_style_context_add_provider_for_display (gdk_display_get_default (),
-                                              GTK_STYLE_PROVIDER (provider),
-                                              800);
-  g_object_unref (provider);
 }
 
 static void
@@ -460,7 +413,7 @@ demo_tagged_entry_tag_set_has_close_button (DemoTaggedEntryTag *tag,
 
   if (!has_close_button && tag->button)
     {
-      gtk_container_remove (GTK_CONTAINER (tag->box), tag->button);
+      gtk_box_remove (GTK_BOX (tag->box), tag->button);
       tag->button = NULL;
     }
   else if (has_close_button && tag->button == NULL)
@@ -469,11 +422,11 @@ demo_tagged_entry_tag_set_has_close_button (DemoTaggedEntryTag *tag,
 
       image = gtk_image_new_from_icon_name ("window-close-symbolic");
       tag->button = gtk_button_new ();
-      gtk_container_add (GTK_CONTAINER (tag->button), image);
+      gtk_button_set_child (GTK_BUTTON (tag->button), image);
       gtk_widget_set_halign (tag->button, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (tag->button, GTK_ALIGN_CENTER);
-      gtk_button_set_relief (GTK_BUTTON (tag->button), GTK_RELIEF_NONE);
-      gtk_container_add (GTK_CONTAINER (tag->box), tag->button);
+      gtk_button_set_has_frame (GTK_BUTTON (tag->button), FALSE);
+      gtk_box_append (GTK_BOX (tag->box), tag->button);
       g_signal_connect (tag->button, "clicked", G_CALLBACK (on_button_clicked), tag);
     }
 

demos/gtk-demo/demotaggedentry.h

@@ -25,39 +25,11 @@
 
 G_BEGIN_DECLS
 
-#define DEMO_TYPE_TAGGED_ENTRY                 (demo_tagged_entry_get_type ())
-#define DEMO_TAGGED_ENTRY(obj)                 (G_TYPE_CHECK_INSTANCE_CAST ((obj), DEMO_TYPE_TAGGED_ENTRY, DemoTaggedEntry))
-#define DEMO_TAGGED_ENTRY_CLASS(klass)         (G_TYPE_CHECK_CLASS_CAST ((klass), DEMO_TYPE_TAGGED_ENTRY, DemoTaggedEntryClass))
-#define DEMO_IS_TAGGED_ENTRY(obj)              (G_TYPE_CHECK_INSTANCE_TYPE ((obj), DEMO_TYPE_TAGGED_ENTRY))
-#define DEMO_IS_TAGGED_ENTRY_CLASS(klass)      (G_TYPE_CHECK_CLASS_TYPE ((klass), DEMO_TYPE_TAGGED_ENTRY))
-#define DEMO_TAGGED_ENTRY_GET_CLASS(obj)       (G_TYPE_INSTANCE_GET_CLASS ((obj), DEMO_TYPE_TAGGED_ENTRY, DemoTaggedEntryClass))
+#define DEMO_TYPE_TAGGED_ENTRY (demo_tagged_entry_get_type ())
+G_DECLARE_FINAL_TYPE (DemoTaggedEntry, demo_tagged_entry, DEMO, TAGGED_ENTRY, GtkWidget)
 
-typedef struct _DemoTaggedEntry       DemoTaggedEntry;
-typedef struct _DemoTaggedEntryClass  DemoTaggedEntryClass;
-
-struct _DemoTaggedEntry
-{
-  GtkWidget parent;
-};
-
-struct _DemoTaggedEntryClass
-{
-  GtkWidgetClass parent_class;
-};
-
-#define DEMO_TYPE_TAGGED_ENTRY_TAG                (demo_tagged_entry_tag_get_type ())
-#define DEMO_TAGGED_ENTRY_TAG(obj)                (G_TYPE_CHECK_INSTANCE_CAST ((obj), DEMO_TYPE_TAGGED_ENTRY_TAG, DemoTaggedEntryTag))
-#define DEMO_TAGGED_ENTRY_TAG_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST ((klass), DEMO_TYPE_TAGGED_ENTRY_TAG, DemoTaggedEntryTag))
-#define DEMO_IS_TAGGED_ENTRY_TAG(obj)             (G_TYPE_CHECK_INSTANCE_TYPE ((obj), DEMO_TYPE_TAGGED_ENTRY_TAG))
-#define DEMO_IS_TAGGED_ENTRY_TAG_CLASS(klass)     (G_TYPE_CHECK_CLASS_TYPE ((klass), DEMO_TYPE_TAGGED_ENTRY_TAG))
-#define DEMO_TAGGED_ENTRY_TAG_GET_CLASS(obj)      (G_TYPE_INSTANCE_GET_CLASS ((obj), DEMO_TYPE_TAGGED_ENTRY_TAG, DemoTaggedEntryTagClass))
-
-typedef struct _DemoTaggedEntryTag       DemoTaggedEntryTag;
-typedef struct _DemoTaggedEntryTagClass  DemoTaggedEntryTagClass;
-
-
-GType           demo_tagged_entry_get_type (void) G_GNUC_CONST;
-GType           demo_tagged_entry_tag_get_type (void) G_GNUC_CONST;
+#define DEMO_TYPE_TAGGED_ENTRY_TAG (demo_tagged_entry_tag_get_type ())
+G_DECLARE_FINAL_TYPE (DemoTaggedEntryTag, demo_tagged_entry_tag, DEMO, TAGGED_ENTRY_TAG, GtkWidget)
 
 GtkWidget *     demo_tagged_entry_new     (void);
 

demos/gtk-demo/demowidget.c

@@ -0,0 +1,121 @@
+#include "demowidget.h"
+#include "demolayout.h"
+
+/* parent widget */
+
+struct _DemoWidget
+{
+  GtkWidget parent_instance;
+
+  gboolean backward; /* whether we go 0 -> 1 or 1 -> 0 */
+  gint64 start_time; /* time the transition started */
+  guint tick_id;     /* our tick cb */
+};
+
+struct _DemoWidgetClass
+{
+  GtkWidgetClass parent_class;
+};
+
+G_DEFINE_TYPE (DemoWidget, demo_widget, GTK_TYPE_WIDGET)
+
+/* The widget is controlling the transition by calling
+ * demo_layout_set_position() in a tick callback.
+ *
+ * We take half a second to go from one layout to the other.
+ */
+
+#define DURATION (0.5 * G_TIME_SPAN_SECOND)
+
+static gboolean
+transition (GtkWidget     *widget,
+            GdkFrameClock *frame_clock,
+            gpointer       data)
+{
+  DemoWidget *self = DEMO_WIDGET (widget);
+  DemoLayout *demo_layout = DEMO_LAYOUT (gtk_widget_get_layout_manager (widget));
+  gint64 now = g_get_monotonic_time ();
+
+  gtk_widget_queue_allocate (widget);
+
+  if (self->backward)
+    demo_layout_set_position (demo_layout, 1.0 - (now - self->start_time) / DURATION);
+  else
+    demo_layout_set_position (demo_layout, (now - self->start_time) / DURATION);
+
+  if (now - self->start_time >= DURATION)
+    {
+      self->backward = !self->backward;
+      demo_layout_set_position (demo_layout, self->backward ? 1.0 : 0.0);
+      /* keep things interesting by shuffling the positions */
+      if (!self->backward)
+        demo_layout_shuffle (demo_layout);
+      self->tick_id = 0;
+
+      return G_SOURCE_REMOVE;
+    }
+
+  return G_SOURCE_CONTINUE;
+}
+
+static void
+clicked (GtkGestureClick *gesture,
+         guint            n_press,
+         double           x,
+         double           y,
+         gpointer         data)
+{
+  DemoWidget *self = data;
+
+  if (self->tick_id != 0)
+    return;
+
+  self->start_time = g_get_monotonic_time ();
+  self->tick_id = gtk_widget_add_tick_callback (GTK_WIDGET (self), transition, NULL, NULL);
+}
+
+static void
+demo_widget_init (DemoWidget *self)
+{
+  GtkGesture *gesture;
+
+  gesture = gtk_gesture_click_new ();
+  g_signal_connect (gesture, "pressed", G_CALLBACK (clicked), self);
+  gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (gesture));
+}
+
+static void
+demo_widget_dispose (GObject *object)
+{
+  GtkWidget *child;
+
+  while ((child = gtk_widget_get_first_child (GTK_WIDGET (object))))
+    gtk_widget_unparent (child);
+
+  G_OBJECT_CLASS (demo_widget_parent_class)->dispose (object);
+}
+
+static void
+demo_widget_class_init (DemoWidgetClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+  object_class->dispose = demo_widget_dispose;
+
+  /* here is where we use our custom layout manager */
+  gtk_widget_class_set_layout_manager_type (widget_class, DEMO_TYPE_LAYOUT);
+}
+
+GtkWidget *
+demo_widget_new (void)
+{
+  return g_object_new (DEMO_TYPE_WIDGET, NULL);
+}
+
+void
+demo_widget_add_child (DemoWidget *self,
+                       GtkWidget  *child)
+{
+  gtk_widget_set_parent (child, GTK_WIDGET (self));
+}

demos/gtk-demo/demowidget.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <gtk/gtk.h>
+
+#define DEMO_TYPE_WIDGET (demo_widget_get_type ())
+G_DECLARE_FINAL_TYPE (DemoWidget, demo_widget, DEMO, WIDGET, GtkWidget)
+
+GtkWidget * demo_widget_new       (void);
+
+void        demo_widget_add_child (DemoWidget *self,
+                                   GtkWidget  *child);

demos/gtk-demo/dialog.c

@@ -1,6 +1,8 @@
-/* Dialogs and Message Boxes
+/* Dialogs
+ * #Keywords: GtkMessageDialog
  *
- * Dialog widgets are used to pop up a transient window for user feedback.
+ * Dialogs are used to pop up transient windows for information
+ * and user feedback.
  */
 
 #include <glib/gi18n.h>
@@ -15,57 +17,77 @@ message_dialog_clicked (GtkButton *button,
                         gpointer   user_data)
 {
   GtkWidget *dialog;
-  static gint i = 1;
+  static int i = 1;
 
   dialog = gtk_message_dialog_new (GTK_WINDOW (window),
                                    GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                                    GTK_MESSAGE_INFO,
                                    GTK_BUTTONS_OK_CANCEL,
-                                   "This message box has been popped up the following\n"
-                                   "number of times:");
+                                   "Test message");
   gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
-                                            "%d", i);
-  gtk_dialog_run (GTK_DIALOG (dialog));
-  gtk_widget_destroy (dialog);
+                                            ngettext ("Has been shown once", "Has been shown %d times", i), i);
+  g_signal_connect (dialog, "response", G_CALLBACK (gtk_window_destroy), NULL);
+  gtk_widget_show (dialog);
   i++;
 }
 
+typedef struct {
+  GtkWidget *local_entry1;
+  GtkWidget *local_entry2;
+  GtkWidget *global_entry1;
+  GtkWidget *global_entry2;
+} ResponseData;
+
+static void
+on_dialog_response (GtkDialog *dialog,
+                    int        response,
+                    gpointer   user_data)
+{
+  ResponseData *data = user_data;
+
+  if (response == GTK_RESPONSE_OK)
+    {
+      gtk_editable_set_text (GTK_EDITABLE (data->global_entry1),
+                             gtk_editable_get_text (GTK_EDITABLE (data->local_entry1)));
+      gtk_editable_set_text (GTK_EDITABLE (data->global_entry2),
+                             gtk_editable_get_text (GTK_EDITABLE (data->local_entry2)));
+    }
+
+  gtk_window_destroy (GTK_WINDOW (dialog));
+}
+
 static void
 interactive_dialog_clicked (GtkButton *button,
                             gpointer   user_data)
 {
   GtkWidget *content_area;
   GtkWidget *dialog;
-  GtkWidget *hbox;
-  GtkWidget *image;
   GtkWidget *table;
   GtkWidget *local_entry1;
   GtkWidget *local_entry2;
   GtkWidget *label;
-  gint response;
+  ResponseData *data;
 
   dialog = gtk_dialog_new_with_buttons ("Interactive Dialog",
                                         GTK_WINDOW (window),
-                                        GTK_DIALOG_MODAL| GTK_DIALOG_DESTROY_WITH_PARENT,
-                                        _("_OK"),
-                                        GTK_RESPONSE_OK,
-                                        "_Cancel",
-                                        GTK_RESPONSE_CANCEL,
+                                        GTK_DIALOG_MODAL| GTK_DIALOG_DESTROY_WITH_PARENT|GTK_DIALOG_USE_HEADER_BAR,
+                                        _("_OK"), GTK_RESPONSE_OK,
+                                        _("_Cancel"), GTK_RESPONSE_CANCEL,
                                         NULL);
 
+  gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+
   content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
 
-  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 8);
-  gtk_container_add (GTK_CONTAINER (content_area), hbox);
-
-  image = gtk_image_new_from_icon_name ("dialog-question");
-  gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);
-  gtk_container_add (GTK_CONTAINER (hbox), image);
-
   table = gtk_grid_new ();
-  gtk_grid_set_row_spacing (GTK_GRID (table), 4);
-  gtk_grid_set_column_spacing (GTK_GRID (table), 4);
-  gtk_container_add (GTK_CONTAINER (hbox), table);
+  gtk_widget_set_hexpand (table, TRUE);
+  gtk_widget_set_vexpand (table, TRUE);
+  gtk_widget_set_halign (table, GTK_ALIGN_CENTER);
+  gtk_widget_set_valign (table, GTK_ALIGN_CENTER);
+  gtk_box_append (GTK_BOX (content_area), table);
+  gtk_grid_set_row_spacing (GTK_GRID (table), 6);
+  gtk_grid_set_column_spacing (GTK_GRID (table), 6);
+
   label = gtk_label_new_with_mnemonic ("_Entry 1");
   gtk_grid_attach (GTK_GRID (table), label, 0, 0, 1, 1);
   local_entry1 = gtk_entry_new ();
@@ -81,21 +103,23 @@ interactive_dialog_clicked (GtkButton *button,
   gtk_grid_attach (GTK_GRID (table), local_entry2, 1, 1, 1, 1);
   gtk_label_set_mnemonic_widget (GTK_LABEL (label), local_entry2);
 
-  response = gtk_dialog_run (GTK_DIALOG (dialog));
+  data = g_new (ResponseData, 1);
+  data->local_entry1 = local_entry1;
+  data->local_entry2 = local_entry2;
+  data->global_entry1 = entry1;
+  data->global_entry2 = entry2;
 
-  if (response == GTK_RESPONSE_OK)
-    {
-      gtk_editable_set_text (GTK_EDITABLE (entry1), gtk_editable_get_text (GTK_EDITABLE (local_entry1)));
-      gtk_editable_set_text (GTK_EDITABLE (entry2), gtk_editable_get_text (GTK_EDITABLE (local_entry2)));
-    }
+  g_signal_connect_data (dialog, "response",
+                         G_CALLBACK (on_dialog_response),
+                         data, (GClosureNotify) g_free,
+                         0);
 
-  gtk_widget_destroy (dialog);
+  gtk_widget_show (dialog);
 }
 
 GtkWidget *
 do_dialog (GtkWidget *do_widget)
 {
-  GtkWidget *frame;
   GtkWidget *vbox;
   GtkWidget *vbox2;
   GtkWidget *hbox;
@@ -105,47 +129,45 @@ do_dialog (GtkWidget *do_widget)
 
   if (!window)
     {
-      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
-      gtk_window_set_title (GTK_WINDOW (window), "Dialogs and Message Boxes");
-
-      g_signal_connect (window, "destroy",
-                        G_CALLBACK (gtk_widget_destroyed), &window);
-
-      frame = gtk_frame_new ("Dialogs");
-      g_object_set (frame, "margin", 8, NULL);
-      gtk_container_add (GTK_CONTAINER (window), frame);
+      gtk_window_set_title (GTK_WINDOW (window), "Dialogs");
+      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
-      g_object_set (vbox, "margin", 8, NULL);
-      gtk_container_add (GTK_CONTAINER (frame), vbox);
+      gtk_widget_set_margin_start (vbox, 8);
+      gtk_widget_set_margin_end (vbox, 8);
+      gtk_widget_set_margin_top (vbox, 8);
+      gtk_widget_set_margin_bottom (vbox, 8);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       /* Standard message dialog */
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 8);
-      gtk_container_add (GTK_CONTAINER (vbox), hbox);
+      gtk_box_append (GTK_BOX (vbox), hbox);
       button = gtk_button_new_with_mnemonic ("_Message Dialog");
       g_signal_connect (button, "clicked",
                         G_CALLBACK (message_dialog_clicked), NULL);
-      gtk_container_add (GTK_CONTAINER (hbox), button);
+      gtk_box_append (GTK_BOX (hbox), button);
 
-      gtk_container_add (GTK_CONTAINER (vbox), gtk_separator_new (GTK_ORIENTATION_HORIZONTAL));
+      gtk_box_append (GTK_BOX (vbox), gtk_separator_new (GTK_ORIENTATION_HORIZONTAL));
 
       /* Interactive dialog*/
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 8);
-      gtk_container_add (GTK_CONTAINER (vbox), hbox);
+      gtk_box_append (GTK_BOX (vbox), hbox);
       vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
 
       button = gtk_button_new_with_mnemonic ("_Interactive Dialog");
       g_signal_connect (button, "clicked",
                         G_CALLBACK (interactive_dialog_clicked), NULL);
-      gtk_container_add (GTK_CONTAINER (hbox), vbox2);
-      gtk_container_add (GTK_CONTAINER (vbox2), button);
+      gtk_box_append (GTK_BOX (hbox), vbox2);
+      gtk_box_append (GTK_BOX (vbox2), button);
 
       table = gtk_grid_new ();
       gtk_grid_set_row_spacing (GTK_GRID (table), 4);
       gtk_grid_set_column_spacing (GTK_GRID (table), 4);
-      gtk_container_add (GTK_CONTAINER (hbox), table);
+      gtk_box_append (GTK_BOX (hbox), table);
 
       label = gtk_label_new_with_mnemonic ("_Entry 1");
       gtk_grid_attach (GTK_GRID (table), label, 0, 0, 1, 1);
@@ -164,7 +186,7 @@ do_dialog (GtkWidget *do_widget)
   if (!gtk_widget_get_visible (window))
     gtk_widget_show (window);
   else
-    gtk_widget_destroy (window);
+    gtk_window_destroy (GTK_WINDOW (window));
 
   return window;
 }