[libdazzle] example: add gear menu

[Christian Hergert <chergert src gnome org>]

commit ea4fcdfdf2948dcc346b7ec877c059d692a16d1a
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jul 8 01:16:09 2017 -0700

    example: add gear menu
    
    With a fullscreen action that can be toggled.

 examples/app/example-window.c  |    8 ++++++++
 examples/app/example-window.ui |   18 ++++++++++++++++++
 examples/app/gtk/menus.ui      |    8 ++++++++
 3 files changed, 34 insertions(+), 0 deletions(-)
---
diff --git a/examples/app/example-window.c b/examples/app/example-window.c
index 7c9a73e..aaec2e2 100644
--- a/examples/app/example-window.c
+++ b/examples/app/example-window.c
@@ -12,6 +12,7 @@ struct _ExampleWindow
   GtkNotebook *notebook;
   DzlEmptyState *empty_state;
   GtkStack *stack;
+  GtkPopover *gear_popover;
 };
 
 G_DEFINE_TYPE (ExampleWindow, example_window, DZL_TYPE_APPLICATION_WINDOW)
@@ -152,6 +153,7 @@ example_window_class_init (ExampleWindowClass *klass)
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/example/ui/example-window.ui");
   gtk_widget_class_bind_template_child (widget_class, ExampleWindow, dockbin);
   gtk_widget_class_bind_template_child (widget_class, ExampleWindow, empty_state);
+  gtk_widget_class_bind_template_child (widget_class, ExampleWindow, gear_popover);
   gtk_widget_class_bind_template_child (widget_class, ExampleWindow, header_bar);
   gtk_widget_class_bind_template_child (widget_class, ExampleWindow, notebook);
   gtk_widget_class_bind_template_child (widget_class, ExampleWindow, stack);
@@ -163,6 +165,8 @@ example_window_init (ExampleWindow *self)
   DzlShortcutController *controller;
   g_autoptr(GPropertyAction) left = NULL;
   g_autoptr(GPropertyAction) right = NULL;
+  DzlApplication *app;
+  GMenu *menu;
 
   gtk_widget_init_template (GTK_WIDGET (self));
 
@@ -191,6 +195,10 @@ example_window_init (ExampleWindow *self)
 
   g_action_map_add_action (G_ACTION_MAP (self), G_ACTION (left));
   g_action_map_add_action (G_ACTION_MAP (self), G_ACTION (right));
+
+  app = DZL_APPLICATION (g_application_get_default ());
+  menu = dzl_application_get_menu_by_id (app, "gear-menu");
+  gtk_popover_bind_model (self->gear_popover, G_MENU_MODEL (menu), NULL);
 }
 
 GtkWidget *
diff --git a/examples/app/example-window.ui b/examples/app/example-window.ui
index 92752a8..5e11289 100644
--- a/examples/app/example-window.ui
+++ b/examples/app/example-window.ui
@@ -55,6 +55,22 @@
             <property name="pack-type">end</property>
           </packing>
         </child>
+        <child>
+          <object class="GtkMenuButton" id="gear_menu">
+            <property name="visible">true</property>
+            <property name="popover">gear_popover</property>
+            <child>
+              <object class="GtkImage">
+                <property name="icon-name">open-menu-symbolic</property>
+                <property name="visible">true</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="position">0</property>
+            <property name="pack-type">end</property>
+          </packing>
+        </child>
       </object>
     </child>
     <child>
@@ -115,4 +131,6 @@
       </object>
     </child>
   </template>
+  <object class="GtkPopover" id="gear_popover">
+  </object>
 </interface>
diff --git a/examples/app/gtk/menus.ui b/examples/app/gtk/menus.ui
index 765091b..009d9a7 100644
--- a/examples/app/gtk/menus.ui
+++ b/examples/app/gtk/menus.ui
@@ -17,4 +17,12 @@
       </item>
     </section>
   </menu>
+  <menu id="gear-menu">
+    <section id="gear-menu-fullscreen">
+      <item>
+        <attribute name="label" translatable="yes">_Fullscreen</attribute>
+        <attribute name="action">win.fullscreen</attribute>
+      </item>
+    </section>
+  </menu>
 </interface>