From e3d365dbb10032bc45858426220b266a49d2bbee Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Sat, 27 Jun 2020 06:38:20 +0200
Subject: [PATCH] gtk-demo: Add a listview demo for filtering strings

---
 demos/gtk-demo/demo.gresource.xml |   1 +
 demos/gtk-demo/listview_words.c   | 112 ++++++++++++++++++++++++++++++
 demos/gtk-demo/meson.build        |   1 +
 3 files changed, 114 insertions(+)
 create mode 100644 demos/gtk-demo/listview_words.c

diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 3ae9bf0be2..0ec808bd96 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -226,6 +226,7 @@
     <file>listview_minesweeper.c</file>
     <file>listview_settings.c</file>
     <file>listview_weather.c</file>
+    <file>listview_words.c</file>
     <file>list_store.c</file>
     <file>markup.c</file>
     <file>modelbutton.c</file>
diff --git a/demos/gtk-demo/listview_words.c b/demos/gtk-demo/listview_words.c
new file mode 100644
index 0000000000..7966d0ceb6
--- /dev/null
+++ b/demos/gtk-demo/listview_words.c
@@ -0,0 +1,112 @@
+/* Lists/Words
+ *
+ * This demo shows filtering a long list - of words.
+ *
+ * You should have the file `/usr/share/dict/words` installed for
+ * this demo to work.
+ */
+
+#include <gtk/gtk.h>
+
+static GtkWidget *window = NULL;
+
+const char *factory_text =
+"<?xml version='1.0' encoding='UTF-8'?>\n"
+"<interface>\n"
+"  <template class='GtkListItem'>\n"
+"    <property name='child'>\n"
+"      <object class='GtkLabel'>\n"
+"        <binding name='label'>\n"
+"          <lookup name='string' type='GtkStringObject'>\n"
+"            <lookup name='item'>GtkListItem</lookup>\n"
+"          </lookup>\n"
+"        </binding>\n"
+"      </object>\n"
+"    </property>\n"
+"  </template>\n"
+"</interface>\n";
+
+static void
+update_title_cb (GListModel *model,
+                 guint       position,
+                 guint       removed,
+                 guint       added,
+                 GtkWindow  *win)
+{
+  char *title;
+
+  title = g_strdup_printf ("%u Words\n", g_list_model_get_n_items (model));
+  gtk_window_set_title (win, title);
+  g_free (title);
+}
+
+GtkWidget *
+do_listview_words (GtkWidget *do_widget)
+{
+  if (window == NULL)
+    {
+      GtkWidget *header, *listview, *sw, *vbox, *search_entry;
+      GtkFilterListModel *filter_model;
+      GtkStringList *stringlist;
+      GtkFilter *filter;
+      char **words;
+      char *usr_dict_words;
+      GtkExpression *expression;
+
+      if (g_file_get_contents ("/usr/share/dict/words", &usr_dict_words, NULL, NULL))
+        {
+          words = g_strsplit (usr_dict_words, "\n", -1);
+          g_free (usr_dict_words);
+        }
+      else
+        {
+          words = g_strsplit ("lorem ipsum dolor sit amet consectetur adipisci elit sed eiusmod tempor incidunt labore et dolore magna aliqua ut enim ad minim veniam quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat", " ", -1);
+        }
+      stringlist = gtk_string_list_new ((const char **) words);
+      g_strfreev (words);
+
+      filter = gtk_string_filter_new ();
+      expression = gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string");
+      gtk_string_filter_set_expression (GTK_STRING_FILTER (filter), expression);
+      gtk_expression_unref (expression);
+      filter_model = gtk_filter_list_model_new (G_LIST_MODEL (stringlist), filter);
+
+      window = gtk_window_new ();
+      gtk_window_set_title (GTK_WINDOW (window), "Words");
+      header = gtk_header_bar_new ();
+      gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
+      gtk_window_set_titlebar (GTK_WINDOW (window), header);
+
+      gtk_window_set_display (GTK_WINDOW (window),
+                              gtk_widget_get_display (do_widget));
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer*)&window);
+
+      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+      gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+      search_entry = gtk_search_entry_new ();
+      g_object_bind_property (search_entry, "text", filter, "search", 0);
+      gtk_box_append (GTK_BOX (vbox), search_entry);
+
+      sw = gtk_scrolled_window_new ();
+      gtk_box_append (GTK_BOX (vbox), sw);
+
+      listview = gtk_list_view_new_with_factory (
+          gtk_builder_list_item_factory_new_from_bytes (NULL,
+              g_bytes_new_static (factory_text, strlen (factory_text))));
+      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
+      gtk_list_view_set_model (GTK_LIST_VIEW (listview), G_LIST_MODEL (filter_model));
+
+      g_signal_connect (filter_model, "items-changed", G_CALLBACK (update_title_cb), window);
+      update_title_cb (G_LIST_MODEL (filter_model), 0, 0, 0, GTK_WINDOW (window));
+
+      g_object_unref (filter_model);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show (window);
+  else
+    gtk_window_destroy (GTK_WINDOW (window));
+
+  return window;
+}
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index eb6513591b..0b419edb21 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -49,6 +49,7 @@ demos = files([
   'listview_minesweeper.c',
   'listview_settings.c',
   'listview_weather.c',
+  'listview_words.c',
   'markup.c',
   'modelbutton.c',
   'overlay.c',