node-editor: Don't use the ::query-tooltip signal

Use the vfunc, the signal is going away.

.gitlab-ci.yml

@@ -27,14 +27,14 @@ variables:
 
 style-check-diff:
   extends: .only-default
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v15
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v16
   stage: .pre
   allow_failure: true
   script:
     - .gitlab-ci/run-style-check-diff.sh
 
 fedora-x86_64:
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v15
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v16
   stage: build
   variables:
     EXTRA_MESON_FLAGS: "--buildtype=debug --default-library=both"
@@ -66,7 +66,7 @@ fedora-x86_64:
     <<: *cache-paths
 
 release-build:
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v15
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v16
   stage: build
   variables:
     EXTRA_MESON_FLAGS: "--buildtype=release"
@@ -99,12 +99,12 @@ release-build:
 .mingw-defaults: &mingw-defaults
   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%"
+    key: "$CI_JOB_NAME"
     <<: *cache-paths
 
 msys2-mingw32:
@@ -168,7 +168,7 @@ flatpak-master:icon-browser:
   <<: *flatpak-master
 
 static-scan:
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v15
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v16
   stage: analysis
   variables:
     EXTRA_MESON_FLAGS: "--buildtype=debug"
@@ -181,7 +181,7 @@ static-scan:
   allow_failure: true
 
 reference:
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v15
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v16
   stage: docs
   variables:
     EXTRA_MESON_FLAGS: "--buildtype=release"

.gitlab-ci/fedora.Dockerfile

@@ -82,7 +82,7 @@ RUN dnf -y install \
     xorg-x11-server-Xvfb \
  && dnf clean all
 
-RUN pip3 install meson==0.52.1
+RUN pip3 install meson==0.53.1
 
 ARG HOST_USER_ID=5555
 ENV HOST_USER_ID ${HOST_USER_ID}

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

@@ -174,7 +174,7 @@ ul.images li {
         <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 [ 'FAIL', 'UNEXPECTEDPASS' ] %}
+            {% 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>
@@ -207,24 +207,6 @@ ul.images li {
         </div>
 
         <div class="successes">
-          <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="{{ 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 %}
-          </ul>
-
           <h4><a name="{{ suite_result.suite_name }}-expected-fail">Expected failures</a></h4>
           <ul>
           {% for success in suite_result.successes if success.result == 'EXPECTEDFAIL' %}
@@ -244,6 +226,24 @@ ul.images li {
             <li>None</li>
           {% endfor %}
           </ul>
+
+          <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="{{ 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 %}
+          </ul>
         </div>
 
       </div>
@@ -331,7 +331,7 @@ for name, units in suites.items():
     print('Processing {} suite {}:'.format(project_name, suite_name))
 
     def if_failed(unit):
-        if unit['result'] in ['FAIL', 'UNEXPECTEDPASS', 'TIMEOUT']:
+        if unit['result'] in ['FAIL', 'UNEXPECTEDPASS', 'TIMEOUT', 'ERROR',]:
             return True
         return False
 

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

@@ -70,7 +70,7 @@ for name, units in suites.items():
     print('Processing suite {} (units: {})'.format(name, len(units)))
 
     def if_failed(unit):
-        if unit['result'] in ['FAIL', 'UNEXPECTEDPASS', 'TIMEOUT']:
+        if unit['result'] in ['ERROR', 'FAIL', 'UNEXPECTEDPASS', 'TIMEOUT']:
             return True
         return False
 

.gitlab-ci/test-msys2.sh

@@ -34,7 +34,7 @@ pacman --noconfirm -S --needed \
     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-$MSYS2_ARCH-pango-1.44.7-1-any.pkg.tar.xz"
+wget "https://gitlab.gnome.org/creiter/gitlab-ci-win32-runner-v2/raw/master/pango/mingw-w64-$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
@@ -45,11 +45,14 @@ export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
 ccache --zero-stats
 ccache --show-stats
 export CCACHE_DISABLE=true
+# FIXME: introspection disabled for now because of
+# https://gitlab.gnome.org/GNOME/gobject-introspection/-/issues/340
 meson \
     -Dx11-backend=false \
     -Dwayland-backend=false \
     -Dwin32-backend=true \
     -Dvulkan=no \
+    -Dintrospection=false \
     --werror \
     _build
 unset CCACHE_DISABLE

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).

NEWS

@@ -1,3 +1,79 @@
+Overview of Changes in GTK 3.98.3
+=================================
+
+* GtkEntry:
+ - Support setting attributes in ui files
+
+* GtkScaleButton:
+ - Don't derive from GtkButton
+
+* GtkAboutDialog:
+ - Support more common licenses
+
+* GtkEmojiChooser:
+ - Improve keyboard navigation
+
+* GtkLabel:
+ - Remove pattern API
+
+* GtkAspectFrame:
+ - Modernize and simplify
+
+* Chooser buttons:
+ - Make dialogs modal by default
+
+* Various widgets:
+ - Replace shadow-type and relief properties by
+   a simpler has-frame
+
+* CSS:
+ - Use :focus-visible instead of :focus(visible)
+ - Add support for :focus-within
+
+* Focus handling
+ - Fix crossing event generation
+ - Fix focus handling in various widgets
+ - Change :can-focus to be recursive
+ - Fix GtkWindow:is-active setting
+
+* Scrolling
+ - gtk_container_set_focus_[hv]adjustment has been removed
+ - gtk_viewport_set_scroll_to_focus has been added
+
+* Accessibility:
+ - Add a cursor-aspect-ratio setting
+ - Set focus-related states properly
+
+* Themes:
+ - Use blue focus outlines more
+ - Numerous minor improvements
+
+* Wayland:
+ - Fix .Compose file loading
+ - Support popup repositioning
+ - Fix problems with autohide popovers
+
+* GDK:
+ - Remove GdkKeymap from public API, replaced by
+   GdkDevice properties
+ - Add full keyboard translation state to key events
+ - Simplify modifier support, drop GdkModifierIntent
+ - Move key event matching to GDK
+ - Add GdkSurface::enter/leave-monitor signals
+ - Turn GskEvent into a derivable type, and make
+   it introspectable
+
+* GSK:
+ - Turn GskRenderNode into a derivable type, and make
+   it introspectable
+ - Fall back to cairo if compiling shaders fails
+
+* Translation updates:
+ - Japanese
+ - Lithuanian
+ - Turkish
+
+
 Overview of Changes in GTK 3.98.2
 =================================
 

README.md

@@ -27,9 +27,9 @@ 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/
@@ -140,6 +140,12 @@ 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 +162,4 @@ 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.

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

@@ -426,7 +426,7 @@ 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);
 
@@ -460,7 +460,7 @@ edit_guide (ConstraintEditorWindow *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);
@@ -613,19 +613,19 @@ create_widget_func (gpointer item,
   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);
       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);
     }
   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);
     }

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

@@ -9,7 +9,6 @@
     <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">

demos/constraint-editor/constraint-view.c

@@ -214,9 +214,9 @@ 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 +257,9 @@ 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");
+  gtk_widget_add_css_class (frame, "guide");
   g_object_set_data (G_OBJECT (frame), "internal", (char *)"yes");
-  gtk_container_add (GTK_CONTAINER (frame), label);
+  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);

demos/gtk-demo/application.c

@@ -503,13 +503,13 @@ 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
@@ -519,11 +519,11 @@ 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);

demos/gtk-demo/application.ui

@@ -61,7 +61,7 @@
         </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>

demos/gtk-demo/blendmodes.ui

@@ -26,7 +26,7 @@
         <child>
           <object class="GtkScrolledWindow" id="scrolledwindow">
             <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>

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, GTK_STYLE_CLASS_LEFT);
+  has_right = gtk_widget_has_css_class (child, GTK_STYLE_CLASS_RIGHT);
+  has_top = gtk_widget_has_css_class (child, GTK_STYLE_CLASS_TOP);
+  has_bottom = gtk_widget_has_css_class (child, GTK_STYLE_CLASS_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, GTK_STYLE_CLASS_LEFT);
   else if (!has_left && is_left)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
+    gtk_widget_add_css_class (child, GTK_STYLE_CLASS_LEFT);
 
   if (has_right && !is_right)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
+    gtk_widget_remove_css_class (child, GTK_STYLE_CLASS_RIGHT);
   else if (!has_right && is_right)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
+    gtk_widget_add_css_class (child, GTK_STYLE_CLASS_RIGHT);
 
   if (has_top && !is_top)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
+    gtk_widget_remove_css_class (child, GTK_STYLE_CLASS_TOP);
   else if (!has_top && is_top)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
+    gtk_widget_add_css_class (child, GTK_STYLE_CLASS_TOP);
 
   if (has_bottom && !is_bottom)
-    gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
+    gtk_widget_remove_css_class (child, GTK_STYLE_CLASS_BOTTOM);
   else if (!has_bottom && is_bottom)
-    gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
+    gtk_widget_add_css_class (child, GTK_STYLE_CLASS_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/clipboard.c

@@ -12,6 +12,7 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <string.h>
+#include "demoimage.h"
 
 static GtkWidget *window = NULL;
 
@@ -93,147 +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;
-  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
-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 GdkContentProvider *
-prepare_drag (GtkDragSource *source,
-              double         x,
-              double         y,
-              GtkWidget     *image)
-{
-  GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (image));
-
-  if (!GDK_IS_TEXTURE (paintable))
-    return NULL;
-
-  return gdk_content_provider_new_typed (GDK_TYPE_TEXTURE, paintable);
-}
-
-static gboolean
-drag_drop (GtkDropTarget *dest,
-           const GValue  *value,
-           double         x,
-           double         y,
-           GtkImage      *image)
-{
-  GdkTexture *texture = g_value_get_object (value);
-  gtk_image_set_from_paintable (GTK_IMAGE (image), GDK_PAINTABLE (texture));
-
-  return TRUE;
-}
-
-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 (G_MENU_MODEL (menu));
-  gtk_widget_set_parent (popover, image);
-
-  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)
 {
@@ -243,14 +103,6 @@ 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;
 
       window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
@@ -266,7 +118,7 @@ do_clipboard (GtkWidget *do_widget)
       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");
 
@@ -320,62 +172,16 @@ do_clipboard (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), hbox);
 
       /* Create the first image */
-      image = gtk_image_new_from_icon_name ("dialog-warning");
-      gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
+      image = demo_image_new ("dialog-warning");
       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 */
-      dest = gtk_drop_target_new (GDK_TYPE_TEXTURE, GDK_ACTION_COPY);
-      g_signal_connect (dest, "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 second image */
-      image = gtk_image_new_from_icon_name ("process-stop");
-      gtk_image_set_pixel_size (GTK_IMAGE (image), 48);
+      image = demo_image_new ("process-stop");
       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 */
-      dest = gtk_drop_target_new (GDK_TYPE_TEXTURE, GDK_ACTION_COPY);
-      g_signal_connect (dest, "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_container_add (GTK_CONTAINER (hbox), image);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/colorsel.c

@@ -1,119 +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 *drawing_area,
-               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_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);
-      gtk_widget_set_margin_start (vbox, 12);
-      gtk_widget_set_margin_end (vbox, 12);
-      gtk_widget_set_margin_top (vbox, 12);
-      gtk_widget_set_margin_bottom (vbox, 12);
-      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

@@ -324,7 +324,7 @@ do_combobox (GtkWidget *do_widget)
     gtk_widget_set_margin_end (vbox, 10);
     gtk_widget_set_margin_top (vbox, 10);
     gtk_widget_set_margin_bottom (vbox, 10);
-    gtk_container_add (GTK_CONTAINER (window), vbox);
+    gtk_window_set_child (GTK_WINDOW (window), vbox);
 
     /* A combobox demonstrating cell renderers, separators and
      *  insensitive rows
@@ -337,7 +337,7 @@ do_combobox (GtkWidget *do_widget)
     gtk_widget_set_margin_end (box, 5);
     gtk_widget_set_margin_top (box, 5);
     gtk_widget_set_margin_bottom (box, 5);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     model = create_icon_store ();
     combo = gtk_combo_box_new_with_model (model);
@@ -381,7 +381,7 @@ do_combobox (GtkWidget *do_widget)
     gtk_widget_set_margin_end (box, 5);
     gtk_widget_set_margin_top (box, 5);
     gtk_widget_set_margin_bottom (box, 5);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     model = create_capital_store ();
     combo = gtk_combo_box_new_with_model (model);
@@ -412,7 +412,7 @@ do_combobox (GtkWidget *do_widget)
     gtk_widget_set_margin_end (box, 5);
     gtk_widget_set_margin_top (box, 5);
     gtk_widget_set_margin_bottom (box, 5);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    gtk_frame_set_child (GTK_FRAME (frame), box);
 
     combo = gtk_combo_box_text_new_with_entry ();
     fill_combo_entry (combo);
@@ -421,8 +421,7 @@ do_combobox (GtkWidget *do_widget)
     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");
@@ -433,7 +432,7 @@ do_combobox (GtkWidget *do_widget)
     gtk_widget_set_margin_end (box, 5);
     gtk_widget_set_margin_top (box, 5);
     gtk_widget_set_margin_bottom (box, 5);
-    gtk_container_add (GTK_CONTAINER (frame), box);
+    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");

demos/gtk-demo/constraints.c

@@ -21,23 +21,24 @@ 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);
 
-  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);
 }
@@ -257,16 +258,16 @@ do_constraints (GtkWidget *do_widget)
 
      window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
+     gtk_window_set_title (GTK_WINDOW (window), "Constraints");
 
      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);
 
      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);

demos/gtk-demo/constraints2.c

@@ -22,23 +22,24 @@ 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);
 
-  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);
 }
@@ -213,16 +214,16 @@ do_constraints2 (GtkWidget *do_widget)
 
      window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
+     gtk_window_set_title (GTK_WINDOW (window), "Constraints");
 
      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);
 
      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);

demos/gtk-demo/constraints3.c

@@ -20,23 +20,24 @@ 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);
 
-  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);
 }
@@ -133,16 +134,16 @@ do_constraints3 (GtkWidget *do_widget)
 
      window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
+     gtk_window_set_title (GTK_WINDOW (window), "Constraints");
 
      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);
 
      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);

demos/gtk-demo/css_accordion.c

@@ -34,7 +34,7 @@ do_css_accordion (GtkWidget *do_widget)
       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);

demos/gtk-demo/css_basics.c

@@ -92,7 +92,7 @@ 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);
+      gtk_window_set_child (GTK_WINDOW (window), container);
       child = gtk_text_view_new_with_buffer (text);
       gtk_container_add (GTK_CONTAINER (container), child);
       g_signal_connect (text, "changed",

demos/gtk-demo/css_multiplebgs.c

@@ -94,7 +94,7 @@ do_css_multiplebgs (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       container = gtk_overlay_new ();
-      gtk_container_add (GTK_CONTAINER (window), container);
+      gtk_window_set_child (GTK_WINDOW (window), container);
 
       child = gtk_drawing_area_new ();
       gtk_widget_set_name (child, "canvas");

demos/gtk-demo/css_pixbufs.c

@@ -80,7 +80,7 @@ do_css_pixbufs (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &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);

demos/gtk-demo/css_shadows.c

@@ -99,7 +99,7 @@ do_css_shadows (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &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);

demos/gtk-demo/demo.gresource.xml

@@ -12,6 +12,10 @@
   <gresource prefix="/builder">
     <file>demo.ui</file>
   </gresource>
+  <gresource prefix="/clipboard">
+    <file>demoimage.c</file>
+    <file>demoimage.h</file>
+  </gresource>
   <gresource prefix="/css_accordion">
     <file>css_accordion.css</file>
     <file>reset.css</file>
@@ -104,6 +108,10 @@
     <file>gtkfishbowl.c</file>
     <file>gtkfishbowl.h</file>
   </gresource>
+  <gresource prefix="/gears">
+    <file>gtkgears.c</file>
+    <file>gtkgears.h</file>
+  </gresource>
   <gresource prefix="/iconscroll">
     <file>iconscroll.ui</file>
   </gresource>
@@ -150,7 +158,6 @@
     <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>
@@ -176,6 +183,7 @@
     <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>headerbar.c</file>
@@ -272,9 +280,6 @@
   <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>
@@ -304,4 +309,7 @@
     <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

@@ -166,7 +166,7 @@
         </child>
         <child>
           <object class="GtkScrolledWindow" id="scrolledwindow1">
-            <property name="shadow-type">in</property>
+            <property name="has-frame">1</property>
             <property name="hexpand">1</property>
             <property name="vexpand">1</property>
             <child>

demos/gtk-demo/demoimage.c

@@ -0,0 +1,259 @@
+#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 gchar *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
+drag_begin (GtkDragSource *source,
+            GdkDrag       *drag,
+            gpointer       data)
+{
+  GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  DemoImage *demo = DEMO_IMAGE (widget);
+  GdkPaintable *paintable;
+
+  paintable = get_image_paintable (GTK_IMAGE (demo->image));
+  if (paintable)
+    {
+      gtk_drag_icon_set_from_paintable (drag, paintable, -2, -2);
+      g_object_unref (paintable);
+    }
+}
+
+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/demotaggedentry.c

@@ -472,7 +472,7 @@ demo_tagged_entry_tag_set_has_close_button (DemoTaggedEntryTag *tag,
       gtk_container_add (GTK_CONTAINER (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_button_set_has_frame (GTK_BUTTON (tag->button), FALSE);
       gtk_container_add (GTK_CONTAINER (tag->box), tag->button);
       g_signal_connect (tag->button, "clicked", G_CALLBACK (on_button_clicked), tag);
     }

demos/gtk-demo/dialog.c

@@ -118,14 +118,14 @@ do_dialog (GtkWidget *do_widget)
       gtk_widget_set_margin_end (frame, 8);
       gtk_widget_set_margin_top (frame, 8);
       gtk_widget_set_margin_bottom (frame, 8);
-      gtk_container_add (GTK_CONTAINER (window), frame);
+      gtk_window_set_child (GTK_WINDOW (window), frame);
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
       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 (frame), vbox);
+      gtk_frame_set_child (GTK_FRAME (frame), vbox);
 
       /* Standard message dialog */
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 8);

demos/gtk-demo/dnd.c

@@ -1,202 +1,126 @@
 /* Drag-and-Drop
  *
- * I can't believe its not glade!
- *
- * Try right-clicking in the window.
+ * This demo shows dragging colors and widgets.
+ * The items in this demo can be moved, recolored
+ * and rotated.
  */
 
-#include <glib/gi18n.h>
 #include <gtk/gtk.h>
-#include <string.h>
 
-typedef struct _GtkDemoWidget GtkDemoWidget;
-struct _GtkDemoWidget
+static GdkContentProvider *
+prepare (GtkDragSource *source,
+         double         x,
+         double         y)
 {
-  GType type;
-  union {
-    char *text;
-    gboolean active;
-  };
-};
+  GtkWidget *canvas;
+  GtkWidget *item;
 
-static gpointer
-copy_demo_widget (gpointer data)
-{
-  GtkDemoWidget *demo = g_memdup (data, sizeof (GtkDemoWidget));
+  canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  item = gtk_widget_pick (canvas, x, y, GTK_PICK_DEFAULT);
 
-  if (demo->type == GTK_TYPE_LABEL)
-    demo->text = g_strdup (demo->text);
+  if (!GTK_IS_LABEL (item))
+    return NULL;
 
-  return demo;
+  g_object_set_data (G_OBJECT (canvas), "dragged-item", item);
+
+  return gdk_content_provider_new_typed (GTK_TYPE_WIDGET, item);
 }
 
 static void
-free_demo_widget (gpointer data)
+drag_begin (GtkDragSource *source,
+            GdkDrag       *drag)
 {
-  GtkDemoWidget *demo = data;
+  GtkWidget *canvas;
+  GtkWidget *item;
 
-  if (demo->type == GTK_TYPE_LABEL)
-    g_free (demo->text);
+  canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  item = g_object_get_data (G_OBJECT (canvas), "dragged-item");
 
-  g_free (demo);
+  gtk_widget_set_opacity (item, 0.5);
 }
 
-#define GTK_TYPE_DEMO_WIDGET (gtk_demo_widget_get_type ())
-static GType gtk_demo_widget_get_type (void);
-G_DEFINE_BOXED_TYPE (GtkDemoWidget, gtk_demo_widget, copy_demo_widget, free_demo_widget)
-
-static GtkDemoWidget *
-serialize_widget (GtkWidget *widget)
+static void
+drag_end (GtkDragSource *source,
+          GdkDrag       *drag)
 {
-  GtkDemoWidget *demo;
+  GtkWidget *canvas;
+  GtkWidget *item;
 
-  demo = g_new0 (GtkDemoWidget, 1);
-  demo->type = G_OBJECT_TYPE (widget);
+  canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
+  item = g_object_get_data (G_OBJECT (canvas), "dragged-item");
+  g_object_set_data (G_OBJECT (canvas), "dragged-item", NULL);
 
-  if (GTK_IS_LABEL (widget))
-    {
-      demo->text = g_strdup (gtk_label_get_text (GTK_LABEL (widget)));
-    }
-  else if (GTK_IS_SPINNER (widget))
-    {
-      g_object_get (widget, "spinning", &demo->active, NULL);
-    }
-  else
-    {
-      g_print ("Type %s not supported\n", g_type_name (demo->type));
-    }
-
-  return demo;
+  gtk_widget_set_opacity (item, 1.0);
 }
 
-static GtkWidget *
-deserialize_widget (GtkDemoWidget *demo)
+static void
+drag_cancel (GtkDragSource       *source,
+             GdkDrag             *drag,
+             GdkDragCancelReason  reason)
 {
-  GtkWidget *widget = NULL;
+  drag_end (source, drag);
+}
 
-  if (demo->type == GTK_TYPE_LABEL)
-    {
-      widget = gtk_label_new (demo->text);
-    }
-  else if (demo->type == GTK_TYPE_SPINNER)
-    {
-      widget = g_object_new (demo->type, "spinning", demo->active, NULL);
-      gtk_style_context_add_class (gtk_widget_get_style_context (widget), "demo");
-    }
-  else
-    {
-      g_print ("Type %s not supported\n", g_type_name (demo->type));
-    }
+typedef struct {
+  double x, y;
+  double angle;
+  double delta;
+} TransformData;
 
-  return widget;
+static void
+apply_transform (GtkWidget *item)
+{
+  GtkWidget *canvas = gtk_widget_get_parent (item);
+  TransformData *data;
+  GskTransform *transform;
+
+  data = g_object_get_data (G_OBJECT (item), "transform-data");
+  transform = gsk_transform_rotate (gsk_transform_translate (NULL, &(graphene_point_t){data->x, data->y}),
+                                    data->angle + data->delta);
+  gtk_fixed_set_child_transform (GTK_FIXED (canvas), item, transform);
+  gsk_transform_unref (transform);
+}
+
+static gboolean
+drag_drop (GtkDropTarget *target,
+           const GValue  *value,
+           double         x,
+           double         y)
+{
+  GtkWidget *item;
+  TransformData *transform_data;
+  GtkWidget *canvas;
+  GtkWidget *last_child;
+
+  item = g_value_get_object (value);
+  transform_data = g_object_get_data (G_OBJECT (item), "transform-data");
+
+  transform_data->x = x;
+  transform_data->y = y;
+
+  canvas = gtk_widget_get_parent (item);
+  last_child = gtk_widget_get_last_child (canvas);
+  if (item != last_child)
+    gtk_widget_insert_after (item, canvas, last_child);
+
+  apply_transform (item);
+
+  return TRUE;
 }
 
 static double pos_x, pos_y;
 
-static void
-new_label_cb (GtkWidget *button,
-              gpointer     data)
-{
-  GtkFixed *fixed = data;
-  GtkWidget *widget;
-
-  widget = gtk_label_new ("Label");
-  gtk_fixed_put (fixed, widget, pos_x, pos_y);
-
-  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
-}
+static GtkWidget * canvas_item_new (double x, double y);
 
 static void
-new_spinner_cb (GtkWidget *button,
-                gpointer     data)
+new_item_cb (GtkWidget *button, gpointer data)
 {
-  GtkFixed *fixed = data;
-  GtkWidget *widget;
+  GtkWidget *canvas = data;
+  GtkWidget *item;
 
-  widget = gtk_spinner_new ();
-  gtk_style_context_add_class (gtk_widget_get_style_context (widget), "demo");
-  gtk_spinner_start (GTK_SPINNER (widget));
-  gtk_fixed_put (fixed, widget, pos_x, pos_y);
-
-  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
-}
-
-static void
-copy_cb (GtkWidget *button, GtkWidget *child)
-{
-  GdkClipboard *clipboard;
-  GtkDemoWidget *demo;
-
-  demo = serialize_widget (child);
-
-  clipboard = gdk_display_get_clipboard (gdk_display_get_default ());
-  gdk_clipboard_set (clipboard, GTK_TYPE_DEMO_WIDGET, demo);
-
-  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
-}
-
-static void
-delete_cb (GtkWidget *button, GtkWidget *child)
-{
-  gtk_widget_destroy (child);
-
-  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
-}
-
-static void
-cut_cb (GtkWidget *button, GtkWidget *child)
-{
-  copy_cb (button, child);
-  delete_cb (button, child);
-
-  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
-}
-
-static void
-value_read (GObject      *source,
-            GAsyncResult *res,
-            gpointer      data)
-{
-  GdkClipboard *clipboard = GDK_CLIPBOARD (source);
-  GError *error = NULL;
-  const GValue *value;
-  GtkDemoWidget *demo;
-  GtkWidget *widget = NULL;
-
-  value = gdk_clipboard_read_value_finish (clipboard, res, &error);
-
-  if (value == NULL)
-    {
-      g_print ("error: %s\n", error->message);
-      g_error_free (error);
-      return;
-    }
-
-  if (!G_VALUE_HOLDS (value, GTK_TYPE_DEMO_WIDGET))
-    {
-      g_print ("can't handle clipboard contents\n");
-      return;
-    }
-
-  demo = g_value_get_boxed (value);
-  widget = deserialize_widget (demo);
-
-  gtk_fixed_put (GTK_FIXED (data), widget, pos_x, pos_y);
-}
-
-static void
-paste_cb (GtkWidget *button, GtkWidget *fixed)
-{
-  GdkClipboard *clipboard;
-
-  clipboard = gdk_display_get_clipboard (gdk_display_get_default ());
-  if (gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GTK_TYPE_DEMO_WIDGET))
-    {
-      g_print ("Paste %s\n", g_type_name (GTK_TYPE_DEMO_WIDGET));
-      gdk_clipboard_read_value_async (clipboard, GTK_TYPE_DEMO_WIDGET, 0, NULL, value_read, fixed);
-    }
-  else
-    g_print ("Don't know how to handle clipboard contents\n");
+  item = canvas_item_new (pos_x, pos_y);
+  gtk_container_add (GTK_CONTAINER (canvas), item);
+  apply_transform (item);
 
   gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
 }
@@ -204,14 +128,15 @@ paste_cb (GtkWidget *button, GtkWidget *fixed)
 static void
 edit_label_done (GtkWidget *entry, gpointer data)
 {
-  GtkWidget *fixed = gtk_widget_get_parent (entry);
+  GtkWidget *canvas = gtk_widget_get_parent (entry);
   GtkWidget *label;
   int x, y;
 
-  gtk_fixed_get_child_position (GTK_FIXED (fixed), entry, &x, &y);
+  gtk_fixed_get_child_position (GTK_FIXED (canvas), entry, &x, &y);
 
   label = GTK_WIDGET (g_object_get_data (G_OBJECT (entry), "label"));
   gtk_label_set_text (GTK_LABEL (label), gtk_editable_get_text (GTK_EDITABLE (entry)));
+  gtk_widget_show (label);
 
   gtk_widget_destroy (entry);
 }
@@ -219,10 +144,10 @@ edit_label_done (GtkWidget *entry, gpointer data)
 static void
 edit_cb (GtkWidget *button, GtkWidget *child)
 {
-  GtkWidget *fixed = gtk_widget_get_parent (child);
+  GtkWidget *canvas = gtk_widget_get_parent (child);
   int x, y;
 
-  gtk_fixed_get_child_position (GTK_FIXED (fixed), child, &x, &y);
+  gtk_fixed_get_child_position (GTK_FIXED (canvas), child, &x, &y);
 
   if (GTK_IS_LABEL (child))
     {
@@ -233,21 +158,23 @@ edit_cb (GtkWidget *button, GtkWidget *child)
       gtk_editable_set_text (GTK_EDITABLE (entry), gtk_label_get_text (GTK_LABEL (child)));
       gtk_editable_set_width_chars (GTK_EDITABLE (entry), 12);
       g_signal_connect (entry, "activate", G_CALLBACK (edit_label_done), NULL);
-      gtk_fixed_put (GTK_FIXED (fixed), entry, x, y);
+      gtk_fixed_put (GTK_FIXED (canvas), entry, x, y);
       gtk_widget_grab_focus (entry);
-    }
-  else if (GTK_IS_SPINNER (child))
-    {
-      gboolean active;
-
-      g_object_get (child, "spinning", &active, NULL);
-      g_object_set (child, "spinning", !active, NULL);
+      gtk_widget_hide (child);
     }
 
   if (button)
     gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
 }
 
+static void
+delete_cb (GtkWidget *button, GtkWidget *child)
+{
+  gtk_widget_destroy (child);
+
+  gtk_popover_popdown (GTK_POPOVER (gtk_widget_get_ancestor (button, GTK_TYPE_POPOVER)));
+}
+
 static void
 pressed_cb (GtkGesture *gesture,
             int         n_press,
@@ -266,7 +193,6 @@ pressed_cb (GtkGesture *gesture,
       GtkWidget *menu;
       GtkWidget *box;
       GtkWidget *item;
-      GdkClipboard *clipboard;
 
       pos_x = x;
       pos_y = y;
@@ -278,20 +204,16 @@ pressed_cb (GtkGesture *gesture,
       box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
       gtk_container_add (GTK_CONTAINER (menu), box);
 
-      item = gtk_button_new_with_label ("New Label");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
-      g_signal_connect (item, "clicked", G_CALLBACK (new_label_cb), widget);
-      gtk_container_add (GTK_CONTAINER (box), item);
-      item = gtk_button_new_with_label ("New Spinner");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
-      g_signal_connect (item, "clicked", G_CALLBACK (new_spinner_cb), widget);
+      item = gtk_button_new_with_label ("New");
+      gtk_button_set_has_frame (GTK_BUTTON (item), FALSE);
+      g_signal_connect (item, "clicked", G_CALLBACK (new_item_cb), widget);
       gtk_container_add (GTK_CONTAINER (box), item);
 
       item = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
       gtk_container_add (GTK_CONTAINER (box), item);
 
       item = gtk_button_new_with_label ("Edit");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
+      gtk_button_set_has_frame (GTK_BUTTON (item), FALSE);
       gtk_widget_set_sensitive (item, child != NULL && child != widget);
       g_signal_connect (item, "clicked", G_CALLBACK (edit_cb), child);
       gtk_container_add (GTK_CONTAINER (box), item);
@@ -299,25 +221,8 @@ pressed_cb (GtkGesture *gesture,
       item = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
       gtk_container_add (GTK_CONTAINER (box), item);
 
-      item = gtk_button_new_with_label ("Cut");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
-      gtk_widget_set_sensitive (item, child != NULL && child != widget);
-      g_signal_connect (item, "clicked", G_CALLBACK (cut_cb), child);
-      gtk_container_add (GTK_CONTAINER (box), item);
-      item = gtk_button_new_with_label ("Copy");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
-      gtk_widget_set_sensitive (item, child != NULL && child != widget);
-      g_signal_connect (item, "clicked", G_CALLBACK (copy_cb), child);
-      gtk_container_add (GTK_CONTAINER (box), item);
-      item = gtk_button_new_with_label ("Paste");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
-      clipboard = gdk_display_get_clipboard (gdk_display_get_default ());
-      gtk_widget_set_sensitive (item,
-                                gdk_content_formats_contain_gtype (gdk_clipboard_get_formats (clipboard), GTK_TYPE_DEMO_WIDGET));
-      g_signal_connect (item, "clicked", G_CALLBACK (paste_cb), widget);
-      gtk_container_add (GTK_CONTAINER (box), item);
       item = gtk_button_new_with_label ("Delete");
-      gtk_button_set_relief (GTK_BUTTON (item), GTK_RELIEF_NONE);
+      gtk_button_set_has_frame (GTK_BUTTON (item), FALSE);
       gtk_widget_set_sensitive (item, child != NULL && child != widget);
       g_signal_connect (item, "clicked", G_CALLBACK (delete_cb), child);
       gtk_container_add (GTK_CONTAINER (box), item);
@@ -346,6 +251,165 @@ released_cb (GtkGesture *gesture,
     }
 }
 
+static GtkWidget *
+canvas_new (void)
+{
+  GtkWidget *canvas;
+  GtkDragSource *source;
+  GtkDropTarget *dest;
+  GtkGesture *gesture;
+
+  canvas = gtk_fixed_new ();
+  gtk_widget_set_hexpand (canvas, TRUE);
+  gtk_widget_set_vexpand (canvas, TRUE);
+  gtk_widget_add_css_class (canvas, "frame");
+
+  source = gtk_drag_source_new ();
+  gtk_drag_source_set_actions (source, GDK_ACTION_MOVE);
+  g_signal_connect (source, "prepare", G_CALLBACK (prepare), NULL);
+  g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
+  g_signal_connect (source, "drag-end", G_CALLBACK (drag_end), NULL);
+  g_signal_connect (source, "drag-cancel", G_CALLBACK (drag_cancel), NULL);
+  gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (source));
+
+  dest = gtk_drop_target_new (GTK_TYPE_WIDGET, GDK_ACTION_MOVE);
+  g_signal_connect (dest, "drop", G_CALLBACK (drag_drop), NULL);
+  gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (dest));
+
+  gesture = gtk_gesture_click_new ();
+  gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), 0);
+  g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), NULL);
+  g_signal_connect (gesture, "released", G_CALLBACK (released_cb), NULL);
+  gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (gesture));
+
+  return canvas;
+}
+
+static void
+set_color (GtkWidget *item,
+           GdkRGBA   *color)
+{
+  char *css;
+  char *str;
+  GtkStyleContext *context;
+  GtkCssProvider *provider;
+
+  str = gdk_rgba_to_string (color);
+  css = g_strdup_printf ("* { background: %s; padding: 10px; }", str);
+
+  context = gtk_widget_get_style_context (item);
+  provider = g_object_get_data (G_OBJECT (context), "style-provider");
+  if (provider)
+    gtk_style_context_remove_provider (context, GTK_STYLE_PROVIDER (provider));
+
+  provider = gtk_css_provider_new ();
+  gtk_css_provider_load_from_data (provider, css, -1);
+  gtk_style_context_add_provider (gtk_widget_get_style_context (item), GTK_STYLE_PROVIDER (provider), 800);
+  g_object_set_data_full (G_OBJECT (context), "style-provider", provider, g_object_unref);
+
+  g_free (str);
+  g_free (css);
+}
+
+static gboolean
+item_drag_drop (GtkDropTarget *dest,
+                const GValue  *value,
+                double         x,
+                double         y)
+{
+  GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
+
+  set_color (item, g_value_get_boxed (value));
+
+  return TRUE;
+}
+
+static void
+angle_changed (GtkGestureRotate *gesture,
+               double            angle,
+               double            delta)
+{
+  GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
+  TransformData *data = g_object_get_data (G_OBJECT (item), "transform-data");
+
+  data->delta = angle / M_PI * 180.0;
+
+  apply_transform (item);
+}
+
+static void
+rotate_done (GtkGesture *gesture)
+{
+  GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
+  TransformData *data = g_object_get_data (G_OBJECT (item), "transform-data");
+
+  data->angle = data->angle + data->delta;
+  data->delta = 0;
+}
+
+static void
+click_done (GtkGesture *gesture)
+{
+  GtkWidget *item = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
+  GtkWidget *canvas = gtk_widget_get_parent (item);
+  GtkWidget *last_child;
+
+  last_child = gtk_widget_get_last_child (canvas);
+  if (item != last_child)
+    gtk_widget_insert_after (item, canvas, last_child);
+}
+
+static int n_items = 0;
+
+static GtkWidget *
+canvas_item_new (double x,
+                 double y)
+{
+  GtkWidget *widget;
+  char *label;
+  char *id;
+  TransformData *transform_data;
+  GdkRGBA rgba;
+  GtkDropTarget *dest;
+  GtkGesture *gesture;
+
+  n_items++;
+
+  label = g_strdup_printf ("Item %d", n_items);
+  id = g_strdup_printf ("item%d", n_items);
+
+  gdk_rgba_parse (&rgba, "yellow");
+
+  widget = gtk_label_new (label);
+  gtk_widget_add_css_class (widget, "frame");
+  gtk_widget_set_name (widget, id);
+
+  set_color (widget, &rgba);
+  transform_data = g_new0 (TransformData, 1);
+  transform_data->x = x;
+  transform_data->y = y;
+  transform_data->angle = 0.0;
+  g_object_set_data_full (G_OBJECT (widget), "transform-data", transform_data, g_free);
+
+  g_free (label);
+  g_free (id);
+
+  dest = gtk_drop_target_new (GDK_TYPE_RGBA, GDK_ACTION_COPY);
+  g_signal_connect (dest, "drop", G_CALLBACK (item_drag_drop), NULL);
+  gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (dest));
+
+  gesture = gtk_gesture_rotate_new ();
+  g_signal_connect (gesture, "angle-changed", G_CALLBACK (angle_changed), NULL);
+  g_signal_connect (gesture, "end", G_CALLBACK (rotate_done), NULL);
+  gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (gesture));
+
+  gesture = gtk_gesture_click_new ();
+  g_signal_connect (gesture, "released", G_CALLBACK (click_done), NULL);
+  gtk_widget_add_controller (widget, GTK_EVENT_CONTROLLER (gesture));
+  
+  return widget;
+}
+
 static GtkWidget *window = NULL;
 
 GtkWidget *
@@ -353,37 +417,78 @@ do_dnd (GtkWidget *do_widget)
 {
   if (!window)
     {
-      GtkWidget *vbox, *fixed;
-      GtkGesture *multipress;
-      GtkCssProvider *provider;
+      GtkWidget *sw;
+      GtkWidget *canvas;
+      GtkWidget *widget;
+      GtkWidget *box, *box2, *box3;
+      const char *colors[] = {
+        "red", "green", "blue", "magenta", "orange", "gray", "black", "yellow",
+        "white", "gray", "brown", "pink",  "cyan", "bisque", "gold", "maroon",
+        "navy", "orchid", "olive", "peru", "salmon", "silver", "wheat",
+        NULL
+      };
+      int i;
+      int x, y;
 
+      widget = gtk_color_button_new ();
+      gtk_widget_destroy (widget);
+  
       window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
-      gtk_window_set_title (GTK_WINDOW (window), "Drag-and-drop");
+      gtk_window_set_title (GTK_WINDOW (window), "Drag-and-Drop");
+      gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
 
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
-      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+      gtk_window_set_child (GTK_WINDOW (window), box);
 
-      fixed = gtk_fixed_new ();
-      gtk_container_add (GTK_CONTAINER (vbox), fixed);
-      gtk_widget_set_hexpand (fixed, TRUE);
-      gtk_widget_set_vexpand (fixed, TRUE);
+      box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+      gtk_container_add (GTK_CONTAINER (box), box2);
 
-      multipress = gtk_gesture_click_new ();
-      gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (multipress), 0);
-      g_signal_connect (multipress, "pressed", G_CALLBACK (pressed_cb), NULL);
-      g_signal_connect (multipress, "released", G_CALLBACK (released_cb), NULL);
-      gtk_widget_add_controller (fixed, GTK_EVENT_CONTROLLER (multipress));
+      canvas = canvas_new ();
+      gtk_container_add (GTK_CONTAINER (box2), canvas);
 
-      provider = gtk_css_provider_new ();
-      gtk_css_provider_load_from_resource (provider, "/dnd/dnd.css");
-      gtk_style_context_add_provider_for_display (gdk_display_get_default (),
-                                                  GTK_STYLE_PROVIDER (provider),
-                                                  800);
+      n_items = 0;
+
+      x = y = 40;
+      for (i = 0; i < 4; i++)
+        {
+          GtkWidget *item;
+
+          item = canvas_item_new (x, y);
+          gtk_container_add (GTK_CONTAINER (canvas), item);
+          apply_transform (item);
+
+          x += 150;
+          y += 100;
+        }
+
+      sw = gtk_scrolled_window_new (NULL, NULL);
+      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
+                                      GTK_POLICY_AUTOMATIC,
+                                      GTK_POLICY_NEVER);
+      gtk_container_add (GTK_CONTAINER (box), sw);
+
+      box3 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+      gtk_widget_add_css_class (box3, "linked");
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), box3);
+
+      for (i = 0; colors[i]; i++)
+        {
+          GdkRGBA rgba;
+          GtkWidget *swatch;
+
+          gdk_rgba_parse (&rgba, colors[i]);
+
+          swatch = g_object_new (g_type_from_name ("GtkColorSwatch"),
+                                 "rgba", &rgba,
+                                 "selectable", FALSE,
+                                 NULL);
+          gtk_container_add (GTK_CONTAINER (box3), swatch);
+        }
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/dnd.css

@@ -1,3 +0,0 @@
-spinner.demo {
-  opacity: 1;
-}

demos/gtk-demo/drawingarea.c

@@ -42,7 +42,9 @@ create_surface (GtkWidget *widget)
 }
 
 static void
-scribble_size_allocate (GtkWidget *widget)
+scribble_resize (GtkWidget *widget,
+                 int        width,
+                 int        height)
 {
   create_surface (widget);
 }
@@ -202,7 +204,7 @@ do_drawingarea (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 16);
       gtk_widget_set_margin_top (vbox, 16);
       gtk_widget_set_margin_bottom (vbox, 16);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       /*
        * Create the checkerboard area
@@ -214,7 +216,6 @@ do_drawingarea (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_vexpand (frame, TRUE);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
 
@@ -222,7 +223,7 @@ do_drawingarea (GtkWidget *do_widget)
       gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
       gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), checkerboard_draw, NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (frame), da);
+      gtk_frame_set_child (GTK_FRAME (frame), da);
 
       /*
        * Create the scribble area
@@ -235,17 +236,16 @@ do_drawingarea (GtkWidget *do_widget)
 
       frame = gtk_frame_new (NULL);
       gtk_widget_set_vexpand (frame, TRUE);
-      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), 100);
       gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), scribble_draw, NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (frame), da);
+      gtk_frame_set_child (GTK_FRAME (frame), da);
 
-      g_signal_connect (da, "size-allocate",
-                        G_CALLBACK (scribble_size_allocate), NULL);
+      g_signal_connect (da, "resize",
+                        G_CALLBACK (scribble_resize), NULL);
 
       drag = gtk_gesture_drag_new ();
       gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (drag), GDK_BUTTON_PRIMARY);

demos/gtk-demo/editable_cells.c

@@ -360,14 +360,13 @@ do_editable_cells (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 5);
       gtk_widget_set_margin_top (vbox, 5);
       gtk_widget_set_margin_bottom (vbox, 5);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       gtk_container_add (GTK_CONTAINER (vbox),
                           gtk_label_new ("Shopping list (you can edit the cells!)"));
 
       sw = gtk_scrolled_window_new (NULL, NULL);
-      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
-                                           GTK_SHADOW_ETCHED_IN);
+      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
@@ -388,7 +387,7 @@ do_editable_cells (GtkWidget *do_widget)
       g_object_unref (numbers_model);
       g_object_unref (items_model);
 
-      gtk_container_add (GTK_CONTAINER (sw), treeview);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), treeview);
 
       /* some buttons */
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

demos/gtk-demo/entry_completion.c

@@ -59,7 +59,7 @@ do_entry_completion (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 5);
       gtk_widget_set_margin_top (vbox, 5);
       gtk_widget_set_margin_bottom (vbox, 5);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       label = gtk_label_new (NULL);
       gtk_label_set_markup (GTK_LABEL (label), "Completion demo, try writing <b>total</b> or <b>gnome</b> for example.");

demos/gtk-demo/entry_undo.c

@@ -33,7 +33,7 @@ do_entry_undo (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 5);
       gtk_widget_set_margin_top (vbox, 5);
       gtk_widget_set_margin_bottom (vbox, 5);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       label = gtk_label_new (NULL);
       gtk_label_set_markup (GTK_LABEL (label),

demos/gtk-demo/expander.c

@@ -59,7 +59,7 @@ do_expander (GtkWidget *do_widget)
       gtk_widget_set_vexpand (expander, TRUE);
       sw = gtk_scrolled_window_new (NULL, NULL);
       gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 100);
-      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
+      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_NEVER,
                                       GTK_POLICY_AUTOMATIC);
@@ -78,7 +78,7 @@ do_expander (GtkWidget *do_widget)
                                 "A second paragraph will contain even more "
                                 "innuendo, just to make you scroll down or "
                                 "resize the window. Do it already !", -1);
-      gtk_container_add (GTK_CONTAINER (sw), tv);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), tv);
       gtk_container_add (GTK_CONTAINER (expander), sw);
       gtk_container_add (GTK_CONTAINER (area), expander);
       g_signal_connect (expander, "notify::expanded",

demos/gtk-demo/fishbowl.c

@@ -62,7 +62,7 @@ create_blurred_button (void)
 {
   GtkWidget *w = gtk_button_new ();
 
-  gtk_style_context_add_class (gtk_widget_get_style_context (w), "blurred-button");
+  gtk_widget_add_css_class (w, "blurred-button");
 
   return w;
 }
@@ -161,7 +161,7 @@ create_menu_button (void)
   GtkWidget *w = gtk_menu_button_new ();
   GtkWidget *popover = gtk_popover_new ();
 
-  gtk_container_add (GTK_CONTAINER (popover), gtk_button_new_with_label ("Hey!"));
+  gtk_popover_set_child (GTK_POPOVER (popover), gtk_button_new_with_label ("Hey!"));
   gtk_popover_set_autohide (GTK_POPOVER (popover), FALSE);
   gtk_menu_button_set_popover (GTK_MENU_BUTTON (w), popover);
   g_signal_connect (w, "map", G_CALLBACK (mapped), NULL);
@@ -194,7 +194,7 @@ static void
 set_widget_type (GtkFishbowl *fishbowl,
                  int          widget_type_index)
 {
-  GtkWidget *window, *headerbar;
+  GtkWidget *window;
 
   if (widget_type_index == selected_widget_type)
     return;
@@ -205,9 +205,8 @@ set_widget_type (GtkFishbowl *fishbowl,
                                   widget_types[selected_widget_type].create_func);
 
   window = GTK_WIDGET (gtk_widget_get_root (GTK_WIDGET (fishbowl)));
-  headerbar = gtk_window_get_titlebar (GTK_WINDOW (window));
-  gtk_header_bar_set_title (GTK_HEADER_BAR (headerbar),
-                            widget_types[selected_widget_type].name);
+  gtk_window_set_title (GTK_WINDOW (window),
+                        widget_types[selected_widget_type].name);
 }
 
 void

demos/gtk-demo/fishbowl.ui

@@ -49,7 +49,7 @@
         <child type="end">
           <object class="GtkToggleButton" id="changes_allow">
             <property name="icon-name">changes-allow</property>
-            <property name="relief">none</property>
+            <property name="has-frame">0</property>
             <signal name="notify::active" handler="fishbowl_changes_toggled_cb"/>
           </object>
         </child>

demos/gtk-demo/fixed.c

@@ -52,7 +52,7 @@ create_faces (void)
       /* Add a face */
       faces[i].face = gtk_frame_new (NULL);
       gtk_widget_set_size_request (faces[i].face, face_size, face_size);
-      gtk_style_context_add_class (gtk_widget_get_style_context (faces[i].face), faces[i].css_class);
+      gtk_widget_add_css_class (faces[i].face, faces[i].css_class);
       gtk_container_add (GTK_CONTAINER (fixed), faces[i].face);
 
       /* Set up the transformation for each face */
@@ -131,10 +131,10 @@ create_demo_window (GtkWidget *do_widget)
   g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
 
   sw = gtk_scrolled_window_new (NULL, NULL);
-  gtk_container_add (GTK_CONTAINER (window), sw);
+  gtk_window_set_child (GTK_WINDOW (window), sw);
 
   fixed = gtk_fixed_new ();
-  gtk_container_add (GTK_CONTAINER (sw), fixed);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), fixed);
   gtk_widget_set_halign (GTK_WIDGET (fixed), GTK_ALIGN_CENTER);
   gtk_widget_set_valign (GTK_WIDGET (fixed), GTK_ALIGN_CENTER);
 

demos/gtk-demo/flowbox.c

@@ -37,7 +37,7 @@ color_swatch_new (const gchar *color)
   gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (area), 24);
   gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (area), 24);
   gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (area), draw_color, (gpointer) color, NULL);
-  gtk_container_add (GTK_CONTAINER (button), area);
+  gtk_button_set_child (GTK_BUTTON (button), area);
 
   return button;
 }
@@ -735,8 +735,8 @@ do_flowbox (GtkWidget *do_widget)
       gtk_flow_box_set_max_children_per_line (GTK_FLOW_BOX (flowbox), 30);
       gtk_flow_box_set_selection_mode (GTK_FLOW_BOX (flowbox), GTK_SELECTION_NONE);
 
-      gtk_container_add (GTK_CONTAINER (scrolled), flowbox);
-      gtk_container_add (GTK_CONTAINER (window), scrolled);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolled), flowbox);
+      gtk_window_set_child (GTK_WINDOW (window), scrolled);
 
       for (i = 0; colors[i]; i++)
         gtk_container_add (GTK_CONTAINER (flowbox), color_swatch_new (colors[i]));

demos/gtk-demo/font-features.ui

@@ -4,10 +4,10 @@
   <object class="GtkWindow" id="window">
     <property name="default-width">600</property>
     <property name="default-height">500</property>
+    <property name="title">Font Explorer</property>
     <child type="titlebar">
       <object class="GtkHeaderBar">
         <property name="show-title-buttons">1</property>
-        <property name="title">Font Explorer</property>
         <child>
           <object class="GtkButton" id="reset">
             <property name="receives-default">1</property>

demos/gtk-demo/fontplane.c

@@ -189,8 +189,6 @@ gtk_font_plane_init (GtkFontPlane *plane)
 {
   GtkGesture *gesture;
 
-  gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
-
   gesture = gtk_gesture_drag_new ();
   g_signal_connect (gesture, "drag-begin",
 		    G_CALLBACK (plane_drag_gesture_begin), plane);

demos/gtk-demo/fontrendering.ui

@@ -193,7 +193,7 @@
         <child>
           <object class="GtkScrolledWindow">
             <property name="propagate-natural-height">1</property>
-            <property name="shadow-type">in</property>
+            <property name="has-frame">1</property>
             <property name="hexpand">1</property>
             <property name="vexpand">1</property>
             <child>

demos/gtk-demo/gears.c

@@ -0,0 +1,137 @@
+/* OpenGL/Gears
+ *
+ * This is a classic OpenGL demo, running in a GtkGLArea.
+ */
+
+
+#include <stdlib.h>
+#include <gtk/gtk.h>
+
+#include "gtkgears.h"
+
+/************************************************************************
+ *                 DEMO CODE                                            *
+ ************************************************************************/
+
+static void
+on_axis_value_change (GtkAdjustment *adjustment,
+                      gpointer       data)
+{
+  GtkGears *gears = GTK_GEARS (data);
+  int axis = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (adjustment), "axis"));
+
+  gtk_gears_set_axis (gears, axis, gtk_adjustment_get_value (adjustment));
+}
+
+
+static GtkWidget *
+create_axis_slider (GtkGears *gears,
+                    int axis)
+{
+  GtkWidget *box, *label, *slider;
+  GtkAdjustment *adj;
+  const char *text;
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE);
+
+  switch (axis)
+    {
+    case GTK_GEARS_X_AXIS:
+      text = "X";
+      break;
+
+    case GTK_GEARS_Y_AXIS:
+      text = "Y";
+      break;
+
+    case GTK_GEARS_Z_AXIS:
+      text = "Z";
+      break;
+
+    default:
+      g_assert_not_reached ();
+    }
+
+  label = gtk_label_new (text);
+  gtk_container_add (GTK_CONTAINER (box), label);
+  gtk_widget_show (label);
+
+  adj = gtk_adjustment_new (gtk_gears_get_axis (gears, axis), 0.0, 360.0, 1.0, 12.0, 0.0);
+  g_object_set_data (G_OBJECT (adj), "axis", GINT_TO_POINTER (axis));
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (on_axis_value_change),
+                    gears);
+  slider = gtk_scale_new (GTK_ORIENTATION_VERTICAL, adj);
+  gtk_scale_set_draw_value (GTK_SCALE (slider), FALSE);
+  gtk_container_add (GTK_CONTAINER (box), slider);
+  gtk_widget_set_vexpand (slider, TRUE);
+  gtk_widget_show (slider);
+
+  gtk_widget_show (box);
+
+  return box;
+}
+
+GtkWidget *
+do_gears (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+  GtkWidget *box, *hbox, *fps_label, *gears, *overlay, *frame;
+  int i;
+
+  if (!window)
+    {
+      window = gtk_window_new ();
+      gtk_window_set_title (GTK_WINDOW (window), "Gears");
+      gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
+      gtk_window_set_default_size (GTK_WINDOW (window), 640, 640);
+      g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window);
+
+      overlay = gtk_overlay_new ();
+      gtk_widget_set_margin_start (overlay, 12);
+      gtk_widget_set_margin_end (overlay, 12);
+      gtk_widget_set_margin_top (overlay, 12);
+      gtk_widget_set_margin_bottom (overlay, 12);
+
+      gtk_window_set_child (GTK_WINDOW (window), overlay);
+
+      frame = gtk_frame_new (NULL);
+      gtk_widget_set_halign (frame, GTK_ALIGN_START);
+      gtk_widget_set_valign (frame, GTK_ALIGN_START);
+      gtk_widget_add_css_class (frame, "app-notification");
+      gtk_overlay_add_overlay (GTK_OVERLAY (overlay), frame);
+
+      fps_label = gtk_label_new ("");
+      gtk_widget_set_halign (fps_label, GTK_ALIGN_START);
+      gtk_frame_set_child (GTK_FRAME (frame), fps_label);
+
+      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE);
+      gtk_box_set_spacing (GTK_BOX (box), 6);
+      gtk_overlay_set_child (GTK_OVERLAY (overlay), box);
+
+      hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
+      gtk_box_set_spacing (GTK_BOX (box), 6);
+      gtk_container_add (GTK_CONTAINER (box), hbox);
+
+      gears = gtk_gears_new ();
+      gtk_widget_set_hexpand (gears, TRUE);
+      gtk_widget_set_vexpand (gears, TRUE);
+      gtk_container_add (GTK_CONTAINER (hbox), gears);
+
+      for (i = 0; i < GTK_GEARS_N_AXIS; i++)
+        gtk_container_add (GTK_CONTAINER (hbox), create_axis_slider (GTK_GEARS (gears), i));
+
+      hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE);
+      gtk_box_set_spacing (GTK_BOX (hbox), 6);
+      gtk_container_add (GTK_CONTAINER (box), hbox);
+
+      gtk_gears_set_fps_label (GTK_GEARS (gears), GTK_LABEL (fps_label));
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show (window);
+  else
+    gtk_widget_destroy (window);
+
+  return window;
+}

demos/gtk-demo/gestures.c

@@ -153,7 +153,7 @@ do_gestures (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       drawing_area = gtk_drawing_area_new ();
-      gtk_container_add (GTK_CONTAINER (window), drawing_area);
+      gtk_window_set_child (GTK_WINDOW (window), drawing_area);
 
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),
                                       drawing_area_draw,

demos/gtk-demo/glarea.c

@@ -1,4 +1,4 @@
-/* OpenGL Area
+/* OpenGL/OpenGL Area
  *
  * GtkGLArea is a widget that allows custom drawing using OpenGL calls.
  */
@@ -401,7 +401,7 @@ create_glarea_window (GtkWidget *do_widget)
   gtk_widget_set_margin_top (box, 12);
   gtk_widget_set_margin_bottom (box, 12);
   gtk_box_set_spacing (GTK_BOX (box), 6);
-  gtk_container_add (GTK_CONTAINER (window), box);
+  gtk_window_set_child (GTK_WINDOW (window), box);
 
   gl_area = gtk_gl_area_new ();
   gtk_widget_set_hexpand (gl_area, TRUE);

demos/gtk-demo/headerbar.c

@@ -2,9 +2,8 @@
  *
  * GtkHeaderBar is a container that is suitable for implementing
  * window titlebars. One of its features is that it can position
- * a title (and optional subtitle) centered with regard to the
- * full width, regardless of variable-width content at the left
- * or right.
+ * a title centered with regard to the full width, regardless of
+ * variable-width content at the left or right.
  *
  * It is commonly used with gtk_window_set_titlebar()
  */
@@ -25,36 +24,35 @@ do_headerbar (GtkWidget *do_widget)
     {
       window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),  gtk_widget_get_display (do_widget));
+      gtk_window_set_title (GTK_WINDOW (window), "Welcome to Facebook - Log in, sign up or learn more");
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);
       gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
 
       header = gtk_header_bar_new ();
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
-      gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Welcome to Facebook - Log in, sign up or learn more");
-      gtk_header_bar_set_has_subtitle (GTK_HEADER_BAR (header), FALSE);
 
       button = gtk_button_new ();
       icon = g_themed_icon_new ("mail-send-receive-symbolic");
       image = gtk_image_new_from_gicon (icon);
       g_object_unref (icon);
-      gtk_container_add (GTK_CONTAINER (button), image);
+      gtk_button_set_child (GTK_BUTTON (button), image);
       gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
 
       box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
-      gtk_style_context_add_class (gtk_widget_get_style_context (box), "linked");
+      gtk_widget_add_css_class (box, "linked");
       button = gtk_button_new ();
-      gtk_container_add (GTK_CONTAINER (button), gtk_image_new_from_icon_name ("pan-start-symbolic"));
+      gtk_button_set_child (GTK_BUTTON (button), gtk_image_new_from_icon_name ("pan-start-symbolic"));
       gtk_container_add (GTK_CONTAINER (box), button);
       button = gtk_button_new ();
-      gtk_container_add (GTK_CONTAINER (button), gtk_image_new_from_icon_name ("pan-end-symbolic"));
+      gtk_button_set_child (GTK_BUTTON (button), gtk_image_new_from_icon_name ("pan-end-symbolic"));
       gtk_container_add (GTK_CONTAINER (box), button);
 
       gtk_header_bar_pack_start (GTK_HEADER_BAR (header), box);
 
       gtk_window_set_titlebar (GTK_WINDOW (window), header);
 
-      gtk_container_add (GTK_CONTAINER (window), gtk_text_view_new ());
+      gtk_window_set_child (GTK_WINDOW (window), gtk_text_view_new ());
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/help-overlay.ui

@@ -0,0 +1,25 @@
+<interface>
+  <object class="GtkShortcutsWindow" id="help_overlay">
+    <child>
+      <object class="GtkShortcutsSection">
+        <child>
+          <object class="GtkShortcutsGroup">
+            <property name="title">General</property>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="accelerator">F1</property>
+                <property name="title">Show About Dialog</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="accelerator">&lt;Control&gt;q</property>
+                <property name="title">Quit</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

demos/gtk-demo/hypertext.c

@@ -266,8 +266,8 @@ do_hypertext (GtkWidget *do_widget)
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
-      gtk_container_add (GTK_CONTAINER (window), sw);
-      gtk_container_add (GTK_CONTAINER (sw), view);
+      gtk_window_set_child (GTK_WINDOW (window), sw);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
 
       show_page (buffer, 1);
     }

demos/gtk-demo/iconscroll.c

@@ -66,9 +66,9 @@ populate_icons (void)
   hincrement = 0;
 
   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
-		                  GTK_POLICY_NEVER,
-		                  GTK_POLICY_AUTOMATIC);
-  gtk_container_add (GTK_CONTAINER (scrolledwindow), grid);
+                                  GTK_POLICY_NEVER,
+                                  GTK_POLICY_AUTOMATIC);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), grid);
 }
 
 static char *content;
@@ -102,9 +102,9 @@ populate_text (gboolean hilight)
   hincrement = 0;
 
   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
-		                  GTK_POLICY_NEVER,
-		                  GTK_POLICY_AUTOMATIC);
-  gtk_container_add (GTK_CONTAINER (scrolledwindow), textview);
+                                  GTK_POLICY_NEVER,
+                                  GTK_POLICY_AUTOMATIC);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), textview);
 }
 
 static void
@@ -126,9 +126,9 @@ populate_image (void)
   hincrement = 5;
 
   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
-		                  GTK_POLICY_AUTOMATIC,
-		                  GTK_POLICY_AUTOMATIC);
-  gtk_container_add (GTK_CONTAINER (scrolledwindow), image);
+                                  GTK_POLICY_AUTOMATIC,
+                                  GTK_POLICY_AUTOMATIC);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), image);
 }
 
 static void
@@ -137,9 +137,8 @@ set_widget_type (int type)
   if (tick_cb)
     gtk_widget_remove_tick_callback (window, tick_cb);
 
-  if (gtk_bin_get_child (GTK_BIN (scrolledwindow)))
-    gtk_container_remove (GTK_CONTAINER (scrolledwindow),
-                          gtk_bin_get_child (GTK_BIN (scrolledwindow)));
+  if (gtk_scrolled_window_get_child (GTK_SCROLLED_WINDOW (scrolledwindow)))
+    gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), NULL);
 
   selected = type;
 

demos/gtk-demo/iconview.c

@@ -263,7 +263,7 @@ do_iconview (GtkWidget *do_widget)
       load_pixbufs ();
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       tool_bar = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
       gtk_container_add (GTK_CONTAINER (vbox), tool_bar);
@@ -277,8 +277,7 @@ do_iconview (GtkWidget *do_widget)
 
 
       sw = gtk_scrolled_window_new (NULL, NULL);
-      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
-                                           GTK_SHADOW_ETCHED_IN);
+      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
@@ -313,7 +312,7 @@ do_iconview (GtkWidget *do_widget)
       /* Connect to the "item-activated" signal */
       g_signal_connect (icon_view, "item-activated",
                         G_CALLBACK (item_activated), store);
-      gtk_container_add (GTK_CONTAINER (sw), icon_view);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), icon_view);
 
       gtk_widget_grab_focus (icon_view);
     }

demos/gtk-demo/iconview_edit.c

@@ -146,7 +146,7 @@ do_iconview_edit (GtkWidget *do_widget)
                                       "text", COL_TEXT,
                                       NULL);
 
-      gtk_container_add (GTK_CONTAINER (window), icon_view);
+      gtk_window_set_child (GTK_WINDOW (window), icon_view);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/images.c

@@ -346,7 +346,7 @@ do_images (GtkWidget *do_widget)
       gtk_widget_set_margin_end (base_vbox, 16);
       gtk_widget_set_margin_top (base_vbox, 16);
       gtk_widget_set_margin_bottom (base_vbox, 16);
-      gtk_container_add (GTK_CONTAINER (window), base_vbox);
+      gtk_window_set_child (GTK_WINDOW (window), base_vbox);
 
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 16);
       gtk_container_add (GTK_CONTAINER (base_vbox), hbox);
@@ -360,7 +360,6 @@ do_images (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
@@ -368,7 +367,7 @@ do_images (GtkWidget *do_widget)
       image = gtk_image_new_from_icon_name ("gtk3-demo");
       gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);
 
-      gtk_container_add (GTK_CONTAINER (frame), image);
+      gtk_frame_set_child (GTK_FRAME (frame), image);
 
 
       /* Animation */
@@ -379,14 +378,13 @@ do_images (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
 
       picture = gtk_picture_new_for_resource ("/images/floppybuddy.gif");
 
-      gtk_container_add (GTK_CONTAINER (frame), picture);
+      gtk_frame_set_child (GTK_FRAME (frame), picture);
 
       /* Symbolic icon */
 
@@ -396,7 +394,6 @@ do_images (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
@@ -405,7 +402,7 @@ do_images (GtkWidget *do_widget)
       image = gtk_image_new_from_gicon (gicon);
       gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);
 
-      gtk_container_add (GTK_CONTAINER (frame), image);
+      gtk_frame_set_child (GTK_FRAME (frame), image);
 
 
       /* Progressive */
@@ -418,7 +415,6 @@ do_images (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
@@ -427,7 +423,7 @@ do_images (GtkWidget *do_widget)
        * will create the pixbuf and fill it in.
        */
       picture = gtk_picture_new ();
-      gtk_container_add (GTK_CONTAINER (frame), picture);
+      gtk_frame_set_child (GTK_FRAME (frame), picture);
 
       start_progressive_loading (picture);
 
@@ -441,14 +437,13 @@ do_images (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
       gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
       gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
 
       video = gtk_video_new_for_resource ("/images/gtk-logo.webm");
       gtk_media_stream_set_loop (gtk_video_get_media_stream (GTK_VIDEO (video)), TRUE);
-      gtk_container_add (GTK_CONTAINER (frame), video);
+      gtk_frame_set_child (GTK_FRAME (frame), video);
 
       /* Widget paintables */
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);

demos/gtk-demo/infobar.c

@@ -44,7 +44,6 @@ do_infobar (GtkWidget *do_widget)
   GtkWidget *frame;
   GtkWidget *bar;
   GtkWidget *vbox;
-  GtkWidget *vbox2;
   GtkWidget *label;
   GtkWidget *actions;
   GtkWidget *button;
@@ -52,11 +51,13 @@ do_infobar (GtkWidget *do_widget)
   if (!window)
     {
       actions = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+      gtk_widget_add_css_class (actions, "linked");
 
       window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
       gtk_window_set_title (GTK_WINDOW (window), "Info Bars");
+      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
 
       g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window);
 
@@ -65,7 +66,7 @@ do_infobar (GtkWidget *do_widget)
       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);
 
       bar = gtk_info_bar_new ();
       gtk_container_add (GTK_CONTAINER (vbox), bar);
@@ -131,23 +132,18 @@ do_infobar (GtkWidget *do_widget)
       g_object_bind_property (bar, "revealed", button, "active", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
       gtk_container_add (GTK_CONTAINER (actions), button);
 
-      frame = gtk_frame_new ("Info bars");
+      frame = gtk_frame_new ("An example of different info bars");
       gtk_widget_set_margin_top (frame, 8);
       gtk_widget_set_margin_bottom (frame, 8);
       gtk_container_add (GTK_CONTAINER (vbox), frame);
 
-      vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
-      gtk_widget_set_margin_start (vbox2, 8);
-      gtk_widget_set_margin_end (vbox2, 8);
-      gtk_widget_set_margin_top (vbox2, 8);
-      gtk_widget_set_margin_bottom (vbox2, 8);
-      gtk_container_add (GTK_CONTAINER (frame), vbox2);
+      gtk_widget_set_halign (actions, GTK_ALIGN_CENTER);
 
-      /* Standard message dialog */
-      label = gtk_label_new ("An example of different info bars");
-      gtk_container_add (GTK_CONTAINER (vbox2), label);
-
-      gtk_container_add (GTK_CONTAINER (vbox2), actions);
+      gtk_widget_set_margin_start (actions, 8);
+      gtk_widget_set_margin_end (actions, 8);
+      gtk_widget_set_margin_top (actions, 8);
+      gtk_widget_set_margin_bottom (actions, 8);
+      gtk_frame_set_child (GTK_FRAME (frame), actions);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/links.c

@@ -1,7 +1,7 @@
 /* Links
  *
  * GtkLabel can show hyperlinks. The default action is to call
- * gtk_show_uri_on_window() on their URI, but it is possible to override
+ * gtk_show_uri() on their URI, but it is possible to override
  * this with a custom handler.
  */
 
@@ -30,6 +30,8 @@ activate_link (GtkWidget   *label,
                  GTK_DIALOG_DESTROY_WITH_PARENT,
                  GTK_MESSAGE_INFO,
                  GTK_BUTTONS_OK,
+                 "Keyboard navigation");
+      gtk_message_dialog_format_secondary_markup (GTK_MESSAGE_DIALOG (dialog),
                  "The term <i>keynav</i> is a shorthand for "
                  "keyboard navigation and refers to the process of using "
                  "a program (exclusively) via keyboard input.");
@@ -56,22 +58,30 @@ do_links (GtkWidget *do_widget)
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
       gtk_window_set_title (GTK_WINDOW (window), "Links");
+      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       label = gtk_label_new ("Some <a href=\"http://en.wikipedia.org/wiki/Text\""
-                             "title=\"plain text\">text</a> may be marked up\n"
-                             "as hyperlinks, which can be clicked\n"
-                             "or activated via <a href=\"keynav\">keynav</a>\n"
-                             "and they work fine with other markup, like when\n"
+                             "title=\"plain text\">text</a> may be marked up "
+                             "as hyperlinks, which can be clicked "
+                             "or activated via <a href=\"keynav\">keynav</a> "
+                             "and they work fine with other markup, like when "
                              "searching on <a href=\"http://www.google.com/\">"
                              "<span color=\"#0266C8\">G</span><span color=\"#F90101\">o</span>"
                              "<span color=\"#F2B50F\">o</span><span color=\"#0266C8\">g</span>"
                              "<span color=\"#00933B\">l</span><span color=\"#F90101\">e</span>"
                              "</a>.");
       gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
+      gtk_label_set_max_width_chars (GTK_LABEL (label), 40);
+      gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+      gtk_label_set_wrap_mode (GTK_LABEL (label), PANGO_WRAP_WORD);
       g_signal_connect (label, "activate-link", G_CALLBACK (activate_link), NULL);
-      gtk_container_add (GTK_CONTAINER (window), label);
+      gtk_widget_set_margin_start (label, 20);
+      gtk_widget_set_margin_end (label, 20);
+      gtk_widget_set_margin_top (label, 20);
+      gtk_widget_set_margin_bottom (label, 20);
+      gtk_window_set_child (GTK_WINDOW (window), label);
       gtk_widget_show (label);
     }
 

demos/gtk-demo/list_store.c

@@ -266,14 +266,13 @@ do_list_store (GtkWidget *do_widget)
       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 ("This is the bug list (note: not based on real data, it would be nice to have a nice ODBC interface to bugzilla or so, though).");
       gtk_container_add (GTK_CONTAINER (vbox), label);
 
       sw = gtk_scrolled_window_new (NULL, NULL);
-      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
-                                           GTK_SHADOW_ETCHED_IN);
+      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_NEVER,
                                       GTK_POLICY_AUTOMATIC);
@@ -290,7 +289,7 @@ do_list_store (GtkWidget *do_widget)
 
       g_object_unref (model);
 
-      gtk_container_add (GTK_CONTAINER (sw), treeview);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), treeview);
 
       /* add columns to the tree view */
       add_columns (GTK_TREE_VIEW (treeview));

demos/gtk-demo/listbox.c

@@ -360,7 +360,7 @@ do_listbox (GtkWidget *do_widget)
                         &window);
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
       label = gtk_label_new ("Messages from GTK and friends");
       gtk_container_add (GTK_CONTAINER (vbox), label);
       scrolled = gtk_scrolled_window_new (NULL, NULL);
@@ -368,7 +368,7 @@ do_listbox (GtkWidget *do_widget)
       gtk_widget_set_vexpand (scrolled, TRUE);
       gtk_container_add (GTK_CONTAINER (vbox), scrolled);
       listbox = gtk_list_box_new ();
-      gtk_container_add (GTK_CONTAINER (scrolled), listbox);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolled), listbox);
 
       gtk_list_box_set_sort_func (GTK_LIST_BOX (listbox), (GtkListBoxSortFunc)gtk_message_row_sort, listbox, NULL);
       gtk_list_box_set_activate_on_single_click (GTK_LIST_BOX (listbox), FALSE);

demos/gtk-demo/listbox.ui

@@ -40,7 +40,7 @@
               <object class="GtkButton" id="button2">
                 <property name="receives-default">1</property>
                 <property name="valign">baseline</property>
-                <property name="relief">none</property>
+                <property name="has-frame">0</property>
                 <child>
                   <object class="GtkLabel" id="source_name">
                     <property name="valign">baseline</property>
@@ -109,7 +109,7 @@
               <object class="GtkLinkButton" id="resent_by_button">
                 <property name="label" translatable="0">reshareer</property>
                 <property name="receives-default">1</property>
-                <property name="relief">none</property>
+                <property name="has-frame">0</property>
                 <property name="uri">http://www.gtk.org</property>
               </object>
             </child>
@@ -126,7 +126,7 @@
               <object class="GtkButton" id="expand_button">
                 <property name="label" translatable="yes">Expand</property>
                 <property name="receives-default">1</property>
-                <property name="relief">none</property>
+                <property name="has-frame">0</property>
                 <signal name="clicked" handler="expand_clicked" swapped="yes"/>
               </object>
             </child>
@@ -138,14 +138,14 @@
                   <object class="GtkButton" id="reply-button">
                     <property name="label" translatable="yes">Reply</property>
                     <property name="receives-default">1</property>
-                    <property name="relief">none</property>
+                    <property name="has-frame">0</property>
                   </object>
                 </child>
                 <child>
                   <object class="GtkButton" id="reshare-button">
                     <property name="label" translatable="yes">Reshare</property>
                     <property name="receives-default">1</property>
-                    <property name="relief">none</property>
+                    <property name="has-frame">0</property>
                     <signal name="clicked" handler="reshare_clicked" swapped="yes"/>
                   </object>
                 </child>
@@ -153,7 +153,7 @@
                   <object class="GtkButton" id="favorite-buttton">
                     <property name="label" translatable="yes">Favorite</property>
                     <property name="receives-default">1</property>
-                    <property name="relief">none</property>
+                    <property name="has-frame">0</property>
                     <signal name="clicked" handler="favorite_clicked" swapped="yes"/>
                   </object>
                 </child>
@@ -161,7 +161,7 @@
                   <object class="GtkMenuButton" id="more-button">
                     <property name="receives-default">1</property>
                     <property name="menu-model">menu1</property>
-                    <property name="relief">none</property>
+                    <property name="has-frame">0</property>
                     <property name="label" translatable="yes">More...</property>
                   </object>
                 </child>
@@ -185,7 +185,6 @@
                     <property name="spacing">8</property>
                     <child>
                       <object class="GtkFrame" id="frame1">
-                        <property name="shadow-type">none</property>
                         <child>
                           <object class="GtkLabel" id="n_reshares_label">
                             <property name="label" translatable="0">&lt;b&gt;2&lt;/b&gt;
@@ -198,7 +197,6 @@ Reshares</property>
                     </child>
                     <child>
                       <object class="GtkFrame" id="frame2">
-                        <property name="shadow-type">none</property>
                         <child>
                           <object class="GtkLabel" id="n_favorites_label">
                             <property name="label" translatable="0">&lt;b&gt;2&lt;/b&gt;
@@ -225,7 +223,7 @@ FAVORITES</property>
                       <object class="GtkButton" id="button5">
                         <property name="label" translatable="yes">Details</property>
                         <property name="receives-default">1</property>
-                        <property name="relief">none</property>
+                        <property name="has-frame">0</property>
                         <style>
                           <class name="dim-label"/>
                         </style>

demos/gtk-demo/main.c

@@ -17,7 +17,7 @@ static gchar *current_file = NULL;
 
 static GtkWidget *notebook;
 static GtkWidget *treeview;
-static GtkWidget *headerbar;
+static GtkWidget *toplevel;
 
 enum {
   NAME_COLUMN,
@@ -55,6 +55,8 @@ activate_about (GSimpleAction *action,
                           glib_major_version,
                           glib_minor_version,
                           glib_micro_version);
+  g_string_append_printf (s, "\tPango\t%s\n",
+                          pango_version_string ());
   g_string_append_printf (s, "\tGTK\t%d.%d.%d\n",
                           gtk_get_major_version (),
                           gtk_get_minor_version (),
@@ -70,7 +72,7 @@ activate_about (GSimpleAction *action,
   gtk_show_about_dialog (GTK_WINDOW (gtk_application_get_active_window (app)),
                          "program-name", "GTK Demo",
                          "version", version,
-                         "copyright", "© 1997—2019 The GTK Team",
+                         "copyright", "© 1997—2020 The GTK Team",
                          "license-type", GTK_LICENSE_LGPL_2_1,
                          "website", "http://www.gtk.org",
                          "comments", "Program to demonstrate GTK widgets",
@@ -569,7 +571,7 @@ display_image (const char *resource)
   gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
   gtk_widget_set_valign (image, GTK_ALIGN_CENTER);
   sw = gtk_scrolled_window_new (NULL, NULL);
-  gtk_container_add (GTK_CONTAINER (sw), image);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), image);
 
   return sw;
 }
@@ -612,9 +614,7 @@ display_text (const char *resource)
   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                   GTK_POLICY_AUTOMATIC,
                                   GTK_POLICY_AUTOMATIC);
-  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
-                                       GTK_SHADOW_NONE);
-  gtk_container_add (GTK_CONTAINER (sw), textview);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), textview);
 
   return sw;
 }
@@ -915,7 +915,7 @@ selection_cb (GtkTreeSelection *selection,
   if (filename)
     load_file (name, filename);
 
-  gtk_header_bar_set_title (GTK_HEADER_BAR (headerbar), title);
+  gtk_window_set_title (GTK_WINDOW (toplevel), title);
 
   g_free (name);
   g_free (title);
@@ -1030,9 +1030,9 @@ activate (GApplication *app)
 
   info_view = (GtkWidget *)gtk_builder_get_object (builder, "info-textview");
   source_view = (GtkWidget *)gtk_builder_get_object (builder, "source-textview");
-  headerbar = (GtkWidget *)gtk_builder_get_object (builder, "headerbar");
   treeview = (GtkWidget *)gtk_builder_get_object (builder, "treeview");
   model = gtk_tree_view_get_model (GTK_TREE_VIEW (treeview));
+  toplevel = GTK_WIDGET (window);
 
   load_file (gtk_demos[0].name, gtk_demos[0].filename);
 
@@ -1186,6 +1186,14 @@ main (int argc, char **argv)
     { "quit", activate_quit, NULL, NULL, NULL },
     { "inspector", activate_inspector, NULL, NULL, NULL },
   };
+  struct {
+    const gchar *action_and_target;
+    const gchar *accelerators[2];
+  } accels[] = {
+    { "app.about", { "F1", NULL } },
+    { "app.quit", { "<Control>q", NULL } },
+  };
+  int i;
 
   /* Most code in gtk-demo is intended to be exemplary, but not
    * these few lines, which are just a hack so gtk-demo will work
@@ -1203,6 +1211,9 @@ main (int argc, char **argv)
                                    app_entries, G_N_ELEMENTS (app_entries),
                                    app);
 
+  for (i = 0; i < G_N_ELEMENTS (accels); i++)
+    gtk_application_set_accels_for_action (app, accels[i].action_and_target, accels[i].accelerators);
+
   g_application_add_main_option (G_APPLICATION (app), "version", 0, 0, G_OPTION_ARG_NONE, "Show program version", NULL);
   g_application_add_main_option (G_APPLICATION (app), "run", 0, 0, G_OPTION_ARG_STRING, "Run an example", "EXAMPLE");
   g_application_add_main_option (G_APPLICATION (app), "list", 0, 0, G_OPTION_ARG_NONE, "List examples", NULL);

demos/gtk-demo/main.ui

@@ -6,6 +6,10 @@
         <attribute name="label" translatable="yes">_Inspector</attribute>
         <attribute name="action">app.inspector</attribute>
       </item>
+      <item>
+        <attribute name="label" translatable="yes">_Keyboard Shortcuts</attribute>
+        <attribute name="action">win.show-help-overlay</attribute>
+      </item>
       <item>
         <attribute name="label" translatable="yes">_About GTK Demo</attribute>
         <attribute name="action">app.about</attribute>
@@ -27,7 +31,6 @@
     </style>
     <property name="default-width">800</property>
     <property name="default-height">600</property>
-    <property name="title">GTK Demo</property>
     <child type="titlebar">
       <object class="GtkHeaderBar" id="headerbar">
         <property name="show-title-buttons">1</property>

demos/gtk-demo/markup.c

@@ -63,7 +63,7 @@ do_markup (GtkWidget *do_widget)
 
       stack = gtk_stack_new ();
       gtk_widget_show (stack);
-      gtk_container_add (GTK_CONTAINER (window), stack);
+      gtk_window_set_child (GTK_WINDOW (window), stack);
 
       show_source = gtk_check_button_new_with_label ("Source");
       gtk_widget_set_valign (show_source, GTK_ALIGN_CENTER);
@@ -86,7 +86,7 @@ do_markup (GtkWidget *do_widget)
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
-      gtk_container_add (GTK_CONTAINER (sw), view);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
 
       gtk_stack_add_named (GTK_STACK (stack), sw, "formatted");
 
@@ -99,7 +99,7 @@ do_markup (GtkWidget *do_widget)
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
-      gtk_container_add (GTK_CONTAINER (sw), view2);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view2);
 
       gtk_stack_add_named (GTK_STACK (stack), sw, "source");
 

demos/gtk-demo/meson.build

@@ -5,7 +5,6 @@ demos = files([
   'assistant.c',
   'builder.c',
   'clipboard.c',
-  'colorsel.c',
   'combobox.c',
   'constraints.c',
   'constraints2.c',
@@ -28,6 +27,7 @@ demos = files([
   'fishbowl.c',
   'fixed.c',
   'fontrendering.c',
+  'gears.c',
   'gestures.c',
   'glarea.c',
   'headerbar.c',
@@ -89,6 +89,7 @@ extra_demo_sources = files(['main.c',
                             'gtkgears.c',
                             'puzzlepiece.c',
                             'bluroverlay.c',
+                            'demoimage.c',
                             'demotaggedentry.c'])
 
 if harfbuzz_dep.found() and pangoft_dep.found()

demos/gtk-demo/modelbutton.ui

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <object class="GtkWindow" id="window1">
+    <property name="title" translatable="yes">Model Button</property>
     <property name="resizable">0</property>
     <child type="titlebar">
       <object class="GtkHeaderBar">
         <property name="show-title-buttons">1</property>
-        <property name="title" translatable="yes">Model Button</property>
       </object>
     </child>
     <child>

demos/gtk-demo/overlay.c

@@ -37,7 +37,7 @@ do_overlay (GtkWidget *do_widget)
 
       overlay = gtk_overlay_new ();
       grid = gtk_grid_new ();
-      gtk_container_add (GTK_CONTAINER (overlay), grid);
+      gtk_overlay_set_child (GTK_OVERLAY (overlay), grid);
 
       entry = gtk_entry_new ();
 
@@ -78,7 +78,7 @@ do_overlay (GtkWidget *do_widget)
       gtk_widget_set_margin_bottom (entry, 8);
       gtk_container_add (GTK_CONTAINER (vbox), entry);
 
-      gtk_container_add (GTK_CONTAINER (window), overlay);
+      gtk_window_set_child (GTK_WINDOW (window), overlay);
 
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);

demos/gtk-demo/overlay2.c

@@ -57,9 +57,9 @@ do_overlay2 (GtkWidget *do_widget)
       gtk_text_iter_forward_word_end (&end);
       gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
 
-      gtk_container_add (GTK_CONTAINER (window), overlay);
-      gtk_container_add (GTK_CONTAINER (overlay), sw);
-      gtk_container_add (GTK_CONTAINER (sw), text);
+      gtk_window_set_child (GTK_WINDOW (window), overlay);
+      gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), text);
 
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);

demos/gtk-demo/paint.c

@@ -339,6 +339,7 @@ drawing_area_init (DrawingArea *area)
   gtk_widget_add_controller (GTK_WIDGET (area), GTK_EVENT_CONTROLLER (gesture));
 
   area->draw_color = (GdkRGBA) { 0, 0, 0, 1 };
+  area->brush_size = 1;
 }
 
 static GtkWidget *
@@ -388,10 +389,9 @@ do_paint (GtkWidget *toplevel)
       window = gtk_window_new ();
 
       draw_area = drawing_area_new ();
-      gtk_container_add (GTK_CONTAINER (window), draw_area);
+      gtk_window_set_child (GTK_WINDOW (window), draw_area);
 
       headerbar = gtk_header_bar_new ();
-      gtk_header_bar_set_title (GTK_HEADER_BAR (headerbar), "Paint");
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (headerbar), TRUE);
 
       colorbutton = gtk_color_button_new ();
@@ -404,6 +404,7 @@ do_paint (GtkWidget *toplevel)
 
       gtk_header_bar_pack_end (GTK_HEADER_BAR (headerbar), colorbutton);
       gtk_window_set_titlebar (GTK_WINDOW (window), headerbar);
+      gtk_window_set_title (GTK_WINDOW (window), "Paint");
 
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);

demos/gtk-demo/paintable.c

@@ -164,7 +164,7 @@ do_paintable (GtkWidget *do_widget)
 
       nuclear = gtk_nuclear_icon_new (0.0);
       image = gtk_image_new_from_paintable (nuclear);
-      gtk_container_add (GTK_CONTAINER (window), image);
+      gtk_window_set_child (GTK_WINDOW (window), image);
       g_object_unref (nuclear);
     }
 

demos/gtk-demo/paintable_animated.c

@@ -196,7 +196,7 @@ do_paintable_animated (GtkWidget *do_widget)
 
       nuclear = gtk_nuclear_animation_new ();
       image = gtk_image_new_from_paintable (nuclear);
-      gtk_container_add (GTK_CONTAINER (window), image);
+      gtk_window_set_child (GTK_WINDOW (window), image);
       g_object_unref (nuclear);
     }
 

demos/gtk-demo/paintable_mediastream.c

@@ -298,7 +298,7 @@ do_paintable_mediastream (GtkWidget *do_widget)
       gtk_media_stream_set_loop (GTK_MEDIA_STREAM (nuclear), TRUE);
 
       video = gtk_video_new_for_media_stream (nuclear);
-      gtk_container_add (GTK_CONTAINER (window), video);
+      gtk_window_set_child (GTK_WINDOW (window), video);
 
       g_object_unref (nuclear);
     }

demos/gtk-demo/panes.c

@@ -103,7 +103,7 @@ create_pane_options (GtkPaned    *paned,
   gtk_widget_set_margin_bottom (frame, 4);
 
   table = gtk_grid_new ();
-  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_frame_set_child (GTK_FRAME (frame), table);
 
   label = gtk_label_new (label1);
   gtk_grid_attach (GTK_GRID (table), label, 0, 0, 1, 1);
@@ -159,7 +159,7 @@ do_panes (GtkWidget *do_widget)
       gtk_window_set_title (GTK_WINDOW (window), "Paned Widgets");
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       vpaned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
       gtk_widget_set_margin_start (vpaned, 5);
@@ -172,20 +172,17 @@ do_panes (GtkWidget *do_widget)
       gtk_paned_add1 (GTK_PANED (vpaned), hpaned);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_IN);
       gtk_widget_set_size_request (frame, 60, 60);
       gtk_paned_add1 (GTK_PANED (hpaned), frame);
 
       button = gtk_button_new_with_mnemonic ("_Hi there");
-      gtk_container_add (GTK_CONTAINER(frame), button);
+      gtk_frame_set_child (GTK_FRAME (frame), button);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_IN);
       gtk_widget_set_size_request (frame, 80, 60);
       gtk_paned_add2 (GTK_PANED (hpaned), frame);
 
       frame = gtk_frame_new (NULL);
-      gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_IN);
       gtk_widget_set_size_request (frame, 60, 80);
       gtk_paned_add2 (GTK_PANED (vpaned), frame);
 

demos/gtk-demo/password_entry.c

@@ -40,9 +40,9 @@ do_password_entry (GtkWidget *do_widget)
       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), "Choose a Password");
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
       gtk_window_set_titlebar (GTK_WINDOW (window), header);
+      gtk_window_set_title (GTK_WINDOW (window), "Choose a Password");
       gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
       gtk_window_set_deletable (GTK_WINDOW (window), FALSE);
       g_signal_connect (window, "destroy",
@@ -53,7 +53,7 @@ do_password_entry (GtkWidget *do_widget)
       gtk_widget_set_margin_end (box, 18);
       gtk_widget_set_margin_top (box, 18);
       gtk_widget_set_margin_bottom (box, 18);
-      gtk_container_add (GTK_CONTAINER (window), box);
+      gtk_window_set_child (GTK_WINDOW (window), box);
 
       entry = gtk_password_entry_new ();
       gtk_password_entry_set_show_peek_icon (GTK_PASSWORD_ENTRY (entry), TRUE);
@@ -74,7 +74,7 @@ do_password_entry (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (box), entry2);
 
       button = gtk_button_new_with_mnemonic ("_Done");
-      gtk_style_context_add_class (gtk_widget_get_style_context (button), "suggested-action");
+      gtk_widget_add_css_class (button, "suggested-action");
       g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
       gtk_widget_set_sensitive (button, FALSE);
       gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);

demos/gtk-demo/peg_solitaire.c

@@ -276,13 +276,12 @@ do_peg_solitaire (GtkWidget *do_widget)
       g_signal_connect (restart, "clicked", G_CALLBACK (restart), NULL);
 
       header = gtk_header_bar_new ();
-      gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Peg Solitaire");
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
       gtk_header_bar_pack_start (GTK_HEADER_BAR (header), restart);
       window = gtk_window_new ();
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
-      gtk_window_set_title (GTK_WINDOW (window), "Sliding Puzzle");
+      gtk_window_set_title (GTK_WINDOW (window), "Peg Solitaire");
       gtk_window_set_titlebar (GTK_WINDOW (window), header);
       gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
       g_signal_connect (window, "destroy",
@@ -295,7 +294,7 @@ do_peg_solitaire (GtkWidget *do_widget)
       gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
       gtk_grid_set_row_homogeneous (GTK_GRID (grid), TRUE);
       gtk_grid_set_column_homogeneous (GTK_GRID (grid), TRUE);
-      gtk_container_add (GTK_CONTAINER (window), grid);
+      gtk_window_set_child (GTK_WINDOW (window), grid);
 
       for (x = 0; x < 7; x++)
         {

demos/gtk-demo/pickers.c

@@ -29,7 +29,7 @@ do_pickers (GtkWidget *do_widget)
     gtk_widget_set_margin_bottom (table, 20);
     gtk_grid_set_row_spacing (GTK_GRID (table), 3);
     gtk_grid_set_column_spacing (GTK_GRID (table), 10);
-    gtk_container_add (GTK_CONTAINER (window), table);
+    gtk_window_set_child (GTK_WINDOW (window), table);
 
     label = gtk_label_new ("Color:");
     gtk_widget_set_halign (label, GTK_ALIGN_START);

demos/gtk-demo/pixbufs.c

@@ -212,7 +212,7 @@ do_pixbufs (GtkWidget *do_widget)
           gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), back_height);
           gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_func, NULL, NULL);
 
-          gtk_container_add (GTK_CONTAINER (window), da);
+          gtk_window_set_child (GTK_WINDOW (window), da);
 
           gtk_widget_add_tick_callback (da, on_tick, NULL, NULL);
         }

demos/gtk-demo/rotated_text.c

@@ -185,13 +185,12 @@ do_rotated_text (GtkWidget *do_widget)
 
       box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
       gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
-      gtk_container_add (GTK_CONTAINER (window), box);
+      gtk_window_set_child (GTK_WINDOW (window), box);
 
       /* Add a drawing area */
       drawing_area = gtk_drawing_area_new ();
       gtk_container_add (GTK_CONTAINER (box), drawing_area);
-      gtk_style_context_add_class (gtk_widget_get_style_context (drawing_area),
-                                   GTK_STYLE_CLASS_VIEW);
+      gtk_widget_add_css_class (drawing_area, GTK_STYLE_CLASS_VIEW);
 
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),
                                       rotated_text_draw,

demos/gtk-demo/scale.c

@@ -1,4 +1,4 @@
-/* Scale
+/* Scales
  *
  * GtkScale is a way to select a value from a range.
  * Scales can have marks to help pick special values,

demos/gtk-demo/scale.ui

@@ -20,6 +20,7 @@
   </object>
   <object class="GtkWindow" id="window1">
     <property name="title" translatable="yes">Scales</property>
+    <property name="resizable">0</property>
     <child>
       <object class="GtkGrid" id="grid1">
         <property name="row-spacing">10</property>

demos/gtk-demo/search_entry.c

@@ -269,7 +269,7 @@ do_search_entry (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 5);
       gtk_widget_set_margin_top (vbox, 5);
       gtk_widget_set_margin_bottom (vbox, 5);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       label = gtk_label_new (NULL);
       gtk_label_set_markup (GTK_LABEL (label), "Search entry demo");

demos/gtk-demo/search_entry2.c

@@ -78,7 +78,7 @@ do_search_entry2 (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       entry = gtk_search_entry_new ();
       container = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
@@ -87,7 +87,7 @@ do_search_entry2 (GtkWidget *do_widget)
       searchbar = gtk_search_bar_new ();
       gtk_search_bar_connect_entry (GTK_SEARCH_BAR (searchbar), GTK_EDITABLE (entry));
       gtk_search_bar_set_show_close_button (GTK_SEARCH_BAR (searchbar), FALSE);
-      gtk_container_add (GTK_CONTAINER (searchbar), container);
+      gtk_search_bar_set_child (GTK_SEARCH_BAR (searchbar), container);
       gtk_container_add (GTK_CONTAINER (vbox), searchbar);
 
       /* Hook the search bar to key presses */

demos/gtk-demo/shortcut_triggers.c

@@ -65,7 +65,7 @@ do_shortcut_triggers (GtkWidget *do_widget)
       gtk_widget_set_margin_bottom (list, 6);
       gtk_widget_set_margin_start (list, 6);
       gtk_widget_set_margin_end (list, 6);
-      gtk_container_add (GTK_CONTAINER (window), list);
+      gtk_window_set_child (GTK_WINDOW (window), list);
 
       for (i = 0; i < G_N_ELEMENTS (shortcuts); i++)
         {

demos/gtk-demo/sidebar.c

@@ -63,7 +63,7 @@ do_sidebar (GtkWidget *do_widget)
           if (i == 0)
             {
               widget = gtk_image_new_from_icon_name ("org.gtk.Demo4");
-              gtk_style_context_add_class (gtk_widget_get_style_context (widget), "icon-dropshadow");
+              gtk_widget_add_css_class (widget, "icon-dropshadow");
               gtk_image_set_pixel_size (GTK_IMAGE (widget), 256);
             }
           else
@@ -74,7 +74,7 @@ do_sidebar (GtkWidget *do_widget)
           g_object_set (gtk_stack_get_page (GTK_STACK (stack), widget), "title", c, NULL);
         }
 
-       gtk_container_add (GTK_CONTAINER (window), box);
+      gtk_window_set_child (GTK_WINDOW (window), box);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/sizegroup.c

@@ -112,7 +112,7 @@ do_sizegroup (GtkWidget *do_widget)
       gtk_widget_set_margin_end (vbox, 5);
       gtk_widget_set_margin_top (vbox, 5);
       gtk_widget_set_margin_bottom (vbox, 5);
-      gtk_container_add (GTK_CONTAINER (window), vbox);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
 
       size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
       g_object_set_data_full (G_OBJECT (window), "size-group", size_group, g_object_unref);
@@ -128,7 +128,7 @@ do_sizegroup (GtkWidget *do_widget)
       gtk_widget_set_margin_bottom (table, 5);
       gtk_grid_set_row_spacing (GTK_GRID (table), 5);
       gtk_grid_set_column_spacing (GTK_GRID (table), 10);
-      gtk_container_add (GTK_CONTAINER (frame), table);
+      gtk_frame_set_child (GTK_FRAME (frame), table);
 
       add_row (GTK_GRID (table), 0, size_group, "_Foreground", color_options);
       add_row (GTK_GRID (table), 1, size_group, "_Background", color_options);
@@ -144,7 +144,7 @@ do_sizegroup (GtkWidget *do_widget)
       gtk_widget_set_margin_bottom (table, 5);
       gtk_grid_set_row_spacing (GTK_GRID (table), 5);
       gtk_grid_set_column_spacing (GTK_GRID (table), 10);
-      gtk_container_add (GTK_CONTAINER (frame), table);
+      gtk_frame_set_child (GTK_FRAME (frame), table);
 
       add_row (GTK_GRID (table), 0, size_group, "_Dashing", dash_options);
       add_row (GTK_GRID (table), 1, size_group, "_Line ends", end_options);

demos/gtk-demo/sliding_puzzle.c

@@ -267,19 +267,15 @@ start_puzzle (GdkPaintable *paintable)
   guint x, y;
   float aspect_ratio;
 
-  /* Remove the old grid (if there is one) */
-  grid = gtk_bin_get_child (GTK_BIN (frame));
-  if (grid)
-    gtk_container_remove (GTK_CONTAINER (frame), grid);
-
   /* Create a new grid */
   grid = gtk_grid_new ();
   gtk_widget_set_can_focus (grid, TRUE);
-  gtk_container_add (GTK_CONTAINER (frame), grid);
+  gtk_aspect_frame_set_child (GTK_ASPECT_FRAME (frame), grid);
   aspect_ratio = gdk_paintable_get_intrinsic_aspect_ratio (paintable);
   if (aspect_ratio == 0.0)
     aspect_ratio = 1.0;
-  gtk_aspect_frame_set (GTK_ASPECT_FRAME (frame), 0.5, 0.5, aspect_ratio, FALSE);
+  gtk_aspect_frame_set_ratio (GTK_ASPECT_FRAME (frame), aspect_ratio);
+  gtk_aspect_frame_set_obey_child (GTK_ASPECT_FRAME (frame), FALSE);
 
   /* Add shortcuts so people can use the arrow
    * keys to move the puzzle */
@@ -344,7 +340,7 @@ reshuffle (void)
 {
   GtkWidget *grid;
 
-  grid = gtk_bin_get_child (GTK_BIN (frame));
+  grid = gtk_aspect_frame_get_child (GTK_ASPECT_FRAME (frame));
   if (solved)
     start_puzzle (puzzle);
   else
@@ -371,13 +367,14 @@ reconfigure (void)
       child = selected->data;
       g_list_free (selected);
     }
-  image = gtk_bin_get_child (GTK_BIN (child));
+
+  image = gtk_flow_box_child_get_child (GTK_FLOW_BOX_CHILD (child));
   puzzle = gtk_image_get_paintable (GTK_IMAGE (image));
 
-  start_puzzle (puzzle); 
+  start_puzzle (puzzle);
   popover = gtk_widget_get_ancestor (size_spin, GTK_TYPE_POPOVER);
   gtk_popover_popdown (GTK_POPOVER (popover));
-  grid = gtk_bin_get_child (GTK_BIN (frame));
+  grid = gtk_aspect_frame_get_child (GTK_ASPECT_FRAME (frame));
   gtk_widget_grab_focus (grid);
 }
 
@@ -419,7 +416,7 @@ do_sliding_puzzle (GtkWidget *do_widget)
       gtk_widget_set_margin_bottom (tweaks, 10);
 
       choices = gtk_flow_box_new ();
-      gtk_style_context_add_class (gtk_widget_get_style_context (choices), GTK_STYLE_CLASS_VIEW);
+      gtk_widget_add_css_class (choices, GTK_STYLE_CLASS_VIEW);
       add_choice (choices, puzzle);
       add_choice (choices, gtk_nuclear_animation_new ());
       media = gtk_media_file_new_for_resource ("/images/gtk-logo.webm");
@@ -428,7 +425,7 @@ do_sliding_puzzle (GtkWidget *do_widget)
       gtk_media_stream_play (media);
       add_choice (choices, GDK_PAINTABLE (media));
       sw = gtk_scrolled_window_new (NULL, NULL);
-      gtk_container_add (GTK_CONTAINER (sw), choices);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), choices);
       gtk_grid_attach (GTK_GRID (tweaks), sw, 0, 0, 2, 1);
 
       label = gtk_label_new ("Size");
@@ -444,7 +441,7 @@ do_sliding_puzzle (GtkWidget *do_widget)
       g_signal_connect (apply, "clicked", G_CALLBACK (reconfigure), NULL);
 
       popover = gtk_popover_new ();
-      gtk_container_add (GTK_CONTAINER (popover), tweaks);
+      gtk_popover_set_child (GTK_POPOVER (popover), tweaks);
 
       tweak = gtk_menu_button_new ();
       gtk_menu_button_set_popover (GTK_MENU_BUTTON (tweak), popover);
@@ -466,8 +463,8 @@ do_sliding_puzzle (GtkWidget *do_widget)
       g_signal_connect (window, "destroy",
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
-      frame = gtk_aspect_frame_new (NULL, 0.5, 0.5, (float) gdk_paintable_get_intrinsic_aspect_ratio (puzzle), FALSE);
-      gtk_container_add (GTK_CONTAINER (window), frame);
+      frame = gtk_aspect_frame_new (0.5, 0.5, (float) gdk_paintable_get_intrinsic_aspect_ratio (puzzle), FALSE);
+      gtk_window_set_child (GTK_WINDOW (window), frame);
 
       start_puzzle (puzzle);
     }

demos/gtk-demo/spinbutton.c

@@ -1,4 +1,4 @@
-/* Spin Button
+/* Spin Buttons
  *
  * GtkSpinButton provides convenient ways to input data
  * that can be seen as a value in a range. The examples

demos/gtk-demo/stack.ui

@@ -2,6 +2,7 @@
 <interface>
   <object class="GtkWindow" id="window1">
     <property name="title" translatable="yes">Stack</property>
+    <property name="resizable">0</property>
     <child>
       <object class="GtkGrid">
         <child>
@@ -25,6 +26,7 @@
                   <object class="GtkImage">
                     <property name="margin-top">20</property>
                     <property name="margin-bottom">20</property>
+                    <property name="pixel-size">100</property>
                     <property name="icon-name">org.gtk.Demo4</property>
                   </object>
                 </property>

demos/gtk-demo/tabs.c

@@ -46,8 +46,8 @@ do_tabs (GtkWidget *do_widget)
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
-      gtk_container_add (GTK_CONTAINER (window), sw);
-      gtk_container_add (GTK_CONTAINER (sw), view);
+      gtk_window_set_child (GTK_WINDOW (window), sw);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/tagged_entry.c

@@ -25,7 +25,7 @@ add_tag (GtkButton *button, DemoTaggedEntry *entry)
   DemoTaggedEntryTag *tag;
 
   tag = demo_tagged_entry_tag_new ("Blue");
-  gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (tag)), "blue");
+  gtk_widget_add_css_class (GTK_WIDGET (tag), "blue");
   demo_tagged_entry_tag_set_has_close_button (tag, TRUE);
   g_signal_connect (tag, "button-clicked", G_CALLBACK (closed_cb), entry);
 
@@ -67,9 +67,9 @@ do_tagged_entry (GtkWidget *do_widget)
       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), "A tagged entry");
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
       gtk_window_set_titlebar (GTK_WINDOW (window), header);
+      gtk_window_set_title (GTK_WINDOW (window), "A tagged entry");
       gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
       gtk_window_set_deletable (GTK_WINDOW (window), FALSE);
       g_signal_connect (window, "destroy",
@@ -80,7 +80,7 @@ do_tagged_entry (GtkWidget *do_widget)
       gtk_widget_set_margin_end (box, 18);
       gtk_widget_set_margin_top (box, 18);
       gtk_widget_set_margin_bottom (box, 18);
-      gtk_container_add (GTK_CONTAINER (window), box);
+      gtk_window_set_child (GTK_WINDOW (window), box);
 
       entry = demo_tagged_entry_new ();
       gtk_container_add (GTK_CONTAINER (box), entry);
@@ -98,7 +98,7 @@ do_tagged_entry (GtkWidget *do_widget)
       gtk_container_add (GTK_CONTAINER (box2), button);
       
       button = gtk_button_new_with_mnemonic ("_Done");
-      gtk_style_context_add_class (gtk_widget_get_style_context (button), "suggested-action");
+      gtk_widget_add_css_class (button, "suggested-action");
       g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
       gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
 

demos/gtk-demo/textmask.c

@@ -69,7 +69,7 @@ do_textmask (GtkWidget *do_widget)
 
       da = gtk_drawing_area_new ();
 
-      gtk_container_add (GTK_CONTAINER (window), da);
+      gtk_window_set_child (GTK_WINDOW (window), da);
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_text, NULL, NULL);
     }
 

demos/gtk-demo/textscroll.c

@@ -159,7 +159,7 @@ create_text_view (GtkWidget *hbox,
   swindow = gtk_scrolled_window_new (NULL, NULL);
   gtk_container_add (GTK_CONTAINER (hbox), swindow);
   textview = gtk_text_view_new ();
-  gtk_container_add (GTK_CONTAINER (swindow), textview);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (swindow), textview);
 
   timeout = setup_scroll (GTK_TEXT_VIEW (textview), to_end);
 
@@ -188,7 +188,7 @@ do_textscroll (GtkWidget *do_widget)
 
       hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
       gtk_box_set_homogeneous (GTK_BOX (hbox), TRUE);
-      gtk_container_add (GTK_CONTAINER (window), hbox);
+      gtk_window_set_child (GTK_WINDOW (window), hbox);
 
       create_text_view (hbox, TRUE);
       create_text_view (hbox, FALSE);

demos/gtk-demo/textundo.c

@@ -53,8 +53,8 @@ do_textundo (GtkWidget *do_widget)
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
-      gtk_container_add (GTK_CONTAINER (window), sw);
-      gtk_container_add (GTK_CONTAINER (sw), view);
+      gtk_window_set_child (GTK_WINDOW (window), sw);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/textview.c

@@ -486,7 +486,7 @@ do_textview (GtkWidget *do_widget)
       gtk_window_set_title (GTK_WINDOW (window), "Multiple Views");
 
       vpaned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_container_add (GTK_CONTAINER (window), vpaned);
+      gtk_window_set_child (GTK_WINDOW (window), vpaned);
 
       /* For convenience, we just use the autocreated buffer from
        * the first text view; you could also create the buffer
@@ -503,7 +503,7 @@ do_textview (GtkWidget *do_widget)
                                       GTK_POLICY_AUTOMATIC);
       gtk_paned_add1 (GTK_PANED (vpaned), sw);
 
-      gtk_container_add (GTK_CONTAINER (sw), view1);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view1);
 
       sw = gtk_scrolled_window_new (NULL, NULL);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
@@ -511,7 +511,7 @@ do_textview (GtkWidget *do_widget)
                                       GTK_POLICY_AUTOMATIC);
       gtk_paned_add2 (GTK_PANED (vpaned), sw);
 
-      gtk_container_add (GTK_CONTAINER (sw), view2);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view2);
 
       create_tags (buffer);
       insert_text (GTK_TEXT_VIEW (view1));
@@ -547,7 +547,7 @@ recursive_attach_view (int                 depth,
 
   /* Frame is to add a black border around each child view */
   frame = gtk_frame_new (NULL);
-  gtk_container_add (GTK_CONTAINER (frame), child_view);
+  gtk_frame_set_child (GTK_FRAME (frame), child_view);
 
   gtk_text_view_add_child_at_anchor (view, frame, anchor);
 
@@ -594,8 +594,8 @@ easter_egg_callback (GtkWidget *button,
                                   GTK_POLICY_AUTOMATIC,
                                   GTK_POLICY_AUTOMATIC);
 
-  gtk_container_add (GTK_CONTAINER (window), sw);
-  gtk_container_add (GTK_CONTAINER (sw), view);
+  gtk_window_set_child (GTK_WINDOW (window), sw);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);
 
   window_ptr = &window;
   g_object_add_weak_pointer (G_OBJECT (window), window_ptr);

demos/gtk-demo/themes.c

@@ -97,7 +97,6 @@ change_theme (GtkWidget *widget,
               gpointer data)
 {
   GtkBuilder *builder = data;
-  GtkWidget *header;
   GtkWidget *label;
   Theme next = themes[theme++ % G_N_ELEMENTS (themes)];
   char *name;
@@ -107,9 +106,8 @@ change_theme (GtkWidget *widget,
                 "gtk-application-prefer-dark-theme", next.dark,
                 NULL);
 
-  header = GTK_WIDGET (gtk_builder_get_object (builder, "header"));
   name = g_strconcat (next.name, next.dark ? " (dark)" : NULL, NULL);
-  gtk_header_bar_set_title (GTK_HEADER_BAR (header), name);
+  gtk_window_set_title (GTK_WINDOW (widget), name);
   g_free (name);
 
   label = GTK_WIDGET (gtk_builder_get_object (builder, "fps"));

demos/gtk-demo/theming_style_classes.c

@@ -31,7 +31,7 @@ do_theming_style_classes (GtkWidget *do_widget)
       builder = gtk_builder_new_from_resource ("/theming_style_classes/theming.ui");
 
       grid = (GtkWidget *)gtk_builder_get_object (builder, "grid");
-      gtk_container_add (GTK_CONTAINER (window), grid);
+      gtk_window_set_child (GTK_WINDOW (window), grid);
       g_object_unref (builder);
     }
 

demos/gtk-demo/transparent.c

@@ -29,10 +29,10 @@ do_transparent (GtkWidget *do_widget)
       gtk_window_set_title (GTK_WINDOW (window), "Transparency");
 
       overlay = blur_overlay_new ();
-      gtk_container_add (GTK_CONTAINER (window), overlay);
+      gtk_window_set_child (GTK_WINDOW (window), overlay);
 
       button = gtk_button_new_with_label ("Don't click this button!");
-      label = gtk_bin_get_child (GTK_BIN (button));
+      label = gtk_button_get_child (GTK_BUTTON (button));
       gtk_widget_set_margin_start (label, 50);
       gtk_widget_set_margin_end (label, 50);
       gtk_widget_set_margin_top (label, 50);
@@ -45,7 +45,7 @@ do_transparent (GtkWidget *do_widget)
       blur_overlay_add_overlay (BLUR_OVERLAY (overlay), button, 5.0);
 
       button = gtk_button_new_with_label ("Maybe this one?");
-      label = gtk_bin_get_child (GTK_BIN (button));
+      label = gtk_button_get_child (GTK_BUTTON (button));
       gtk_widget_set_margin_start (label, 50);
       gtk_widget_set_margin_end (label, 50);
       gtk_widget_set_margin_top (label, 50);
@@ -58,7 +58,7 @@ do_transparent (GtkWidget *do_widget)
       blur_overlay_add_overlay (BLUR_OVERLAY (overlay), button, 5.0);
 
       picture = gtk_picture_new_for_resource ("/transparent/portland-rose.jpg");
-      gtk_container_add (GTK_CONTAINER (overlay), picture);
+      blur_overlay_set_child (BLUR_OVERLAY (overlay), picture);
     }
 
   if (!gtk_widget_get_visible (window))

demos/gtk-demo/tree_store.c

@@ -402,14 +402,13 @@ do_tree_store (GtkWidget *do_widget)
       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);
 
       gtk_container_add (GTK_CONTAINER (vbox),
                           gtk_label_new ("Jonathan's Holiday Card Planning Sheet"));
 
       sw = gtk_scrolled_window_new (NULL, NULL);
-      gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
-                                           GTK_SHADOW_ETCHED_IN);
+      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                       GTK_POLICY_AUTOMATIC,
                                       GTK_POLICY_AUTOMATIC);
@@ -427,7 +426,7 @@ do_tree_store (GtkWidget *do_widget)
 
       add_columns (GTK_TREE_VIEW (treeview));
 
-      gtk_container_add (GTK_CONTAINER (sw), treeview);
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), treeview);
 
       /* expand all rows after the treeview widget has been realized */
       g_signal_connect (treeview, "realize",

demos/gtk-demo/video_player.c

@@ -71,11 +71,10 @@ do_video_player (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       video = gtk_video_new ();
-      gtk_container_add (GTK_CONTAINER (window), video);
+      gtk_window_set_child (GTK_WINDOW (window), video);
 
       title = gtk_header_bar_new ();
       gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (title), TRUE);
-      gtk_header_bar_set_title (GTK_HEADER_BAR (title), "Video Player");
       gtk_window_set_titlebar (GTK_WINDOW (window), title);
 
       open_button = gtk_button_new_with_mnemonic ("_Open");