[gtk+] gtk-demo: Add a model button demo

[Matthias Clasen <matthiasc src gnome org>]

commit 4d9a94333820edb8dfbd8584605e661d18467e64
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Aug 19 23:17:01 2015 -0400

    gtk-demo: Add a model button demo
    
    This shows how to hook model buttons up to various action types,
    or how to create them manually.

 demos/gtk-demo/Makefile.am        |    1 +
 demos/gtk-demo/demo.gresource.xml |    4 +
 demos/gtk-demo/modelbutton.c      |   69 +++++++++++++++
 demos/gtk-demo/modelbutton.ui     |  168 +++++++++++++++++++++++++++++++++++++
 4 files changed, 242 insertions(+), 0 deletions(-)
---
diff --git a/demos/gtk-demo/Makefile.am b/demos/gtk-demo/Makefile.am
index d85e7ca..088c251 100644
--- a/demos/gtk-demo/Makefile.am
+++ b/demos/gtk-demo/Makefile.am
@@ -41,6 +41,7 @@ demos_base =                                  \
        list_store.c                            \
        markup.c                                \
        menus.c                                 \
+       modelbutton.c                           \
        offscreen_window.c                      \
        offscreen_window2.c                     \
        overlay.c                               \
diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 70eb3b9..a3a3455 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -147,6 +147,7 @@
     <file>list_store.c</file>
     <file>markup.c</file>
     <file>menus.c</file>
+    <file>modelbutton.c</file>
     <file>offscreen_window.c</file>
     <file>offscreen_window2.c</file>
     <file>overlay.c</file>
@@ -209,4 +210,7 @@
   <gresource prefix="/scale">
     <file>scale.ui</file>
   </gresource>
+  <gresource prefix="/modelbutton">
+    <file>modelbutton.ui</file>
+  </gresource>
 </gresources>
diff --git a/demos/gtk-demo/modelbutton.c b/demos/gtk-demo/modelbutton.c
new file mode 100644
index 0000000..8dafda8
--- /dev/null
+++ b/demos/gtk-demo/modelbutton.c
@@ -0,0 +1,69 @@
+/* Model Button
+ *
+ * GtkModelButton is a button widget that is designed to be used with
+ * a GAction as model. The button will adjust its appearance according
+ * to the kind of action it is connected to.
+ *
+ * It is also possible to use GtkModelButton without a GAction. In this
+ * case, you should set the "role" attribute yourself, and connect to the
+ * "clicked" signal as you would for any other button.
+ *
+ * A common use of GtkModelButton is to implement menu-like content
+ * in popovers.
+ */
+
+#include <gtk/gtk.h>
+
+static void
+tool_clicked (GtkButton *button)
+{
+  gboolean active;
+
+  g_object_get (button, "active", &active, NULL);
+  g_object_set (button, "active", !active, NULL);
+}
+
+GtkWidget *
+do_modelbutton (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+  static GActionEntry win_entries[] = {
+    { "color", NULL, "s", "'red'", NULL },
+    { "chocolate", NULL, NULL, "true", NULL },
+    { "vanilla", NULL, NULL, "false", NULL },
+    { "sprinkles", NULL, NULL, NULL, NULL }
+  };
+
+  if (!window)
+    {
+      GtkBuilder *builder;
+      GActionGroup *actions;
+
+      builder = gtk_builder_new_from_resource ("/modelbutton/modelbutton.ui");
+      gtk_builder_add_callback_symbol (builder, "tool_clicked", G_CALLBACK (tool_clicked));
+      gtk_builder_connect_signals (builder, NULL);
+      window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
+      gtk_window_set_screen (GTK_WINDOW (window),
+                             gtk_widget_get_screen (do_widget));
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
+
+      actions = (GActionGroup*)g_simple_action_group_new ();
+      g_action_map_add_action_entries (G_ACTION_MAP (actions),
+                                       win_entries, G_N_ELEMENTS (win_entries),
+                                       window);
+      gtk_widget_insert_action_group (window, "win", actions);
+
+
+      g_object_unref (builder);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show_all (window);
+  else
+    gtk_widget_destroy (window);
+
+
+  return window;
+}
+
diff --git a/demos/gtk-demo/modelbutton.ui b/demos/gtk-demo/modelbutton.ui
new file mode 100644
index 0000000..39121a3
--- /dev/null
+++ b/demos/gtk-demo/modelbutton.ui
@@ -0,0 +1,168 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.6 -->
+  <object class="GtkWindow" id="window1">
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="visible">True</property>
+        <property name="show-close-button">True</property>
+        <property name="title" translatable="yes">Model Button</property>
+      </object>
+    </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="orientation">vertical</property>
+        <property name="margin">80</property>
+        <child>
+          <object class="GtkMenuButton">
+            <property name="visible">True</property>
+            <property name="popover">thing_a</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="label">Color</property>
+                <property name="hexpand">True</property>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="GtkMenuButton">
+            <property name="visible">True</property>
+            <property name="popover">thing_b</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="label">Flavors</property>
+                <property name="hexpand">True</property>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="GtkMenuButton">
+            <property name="visible">True</property>
+            <property name="popover">thing_c</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="label">Tools</property>
+                <property name="hexpand">True</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkPopover" id="thing_a">
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="margin">10</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="halign">fill</property>
+            <property name="action-name">win.color</property>
+            <property name="action-target">'red'</property>
+            <property name="text">Red</property>
+            <property name="inverted">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="halign">fill</property>
+            <property name="action-name">win.color</property>
+            <property name="action-target">'green'</property>
+            <property name="text">Green</property>
+            <property name="inverted">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="halign">fill</property>
+            <property name="action-name">win.color</property>
+            <property name="action-target">'blue'</property>
+            <property name="text">Blue</property>
+            <property name="inverted">True</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkPopover" id="thing_b">
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="margin">10</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">10</property>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="action-name">win.chocolate</property>
+            <property name="text">Chocolate</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="action-name">win.vanilla</property>
+            <property name="text">Vanilla</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkSeparator">
+            <property name="visible">True</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="action-name">win.sprinkles</property>
+            <property name="text">Add Sprinkles</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkPopover" id="thing_c">
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="margin">10</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">10</property>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="text">Hammer</property>
+            <property name="role">check</property>
+            <signal name="clicked" handler="tool_clicked"/>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="text">Screwdriver</property>
+            <property name="role">check</property>
+            <signal name="clicked" handler="tool_clicked"/>
+          </object>
+        </child>
+        <child>
+          <object class="GtkModelButton">
+            <property name="visible">True</property>
+            <property name="text">Drill</property>
+            <property name="role">check</property>
+            <signal name="clicked" handler="tool_clicked"/>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>