[gtk+] add GtkApplicationMenuButton

[Ryan Lortie <ryanl src gnome org>]

commit ddfbe19b2323e1d78519c0e872c3ec5a9554ab29
Author: Ryan Lortie <desrt desrt ca>
Date:   Wed Nov 30 15:24:22 2011 -0500

    add GtkApplicationMenuButton

 gtk/Makefile.am                |    2 +
 gtk/gtk.symbols                |    2 +
 gtk/gtkapplicationmenubutton.c |  209 ++++++++++++++++++++++++++++++++++++++++
 gtk/gtkapplicationmenubutton.h |   44 +++++++++
 4 files changed, 257 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index aad7bc7..f84d23a 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -183,6 +183,7 @@ gtk_public_h_sources = 		\
 	gtkappchooserwidget.h	\
 	gtkapplication.h	\
 	gtkapplicationwindow.h	\
+	gtkapplicationmenubutton.h	\
 	gtkarrow.h		\
 	gtkaspectframe.h	\
 	gtkassistant.h		\
@@ -532,6 +533,7 @@ gtk_base_c_sources = 		\
 	gtkappchooseronline.c	\
 	gtkapplication.c	\
 	gtkapplicationwindow.c	\
+	gtkapplicationmenubutton.c	\
 	gtkanimationdescription.c \
 	gtkarrow.c		\
 	gtkaspectframe.c	\
diff --git a/gtk/gtk.symbols b/gtk/gtk.symbols
index d6aa5e5..b4fcf74 100644
--- a/gtk/gtk.symbols
+++ b/gtk/gtk.symbols
@@ -227,6 +227,8 @@ gtk_application_window_get_show_app_menu
 gtk_application_window_get_type
 gtk_application_window_new
 gtk_application_window_set_show_app_menu
+gtk_application_menu_button_get_type
+gtk_application_menu_button_new
 gtk_arrow_get_type
 gtk_arrow_new
 gtk_arrow_placement_get_type
diff --git a/gtk/gtkapplicationmenubutton.c b/gtk/gtkapplicationmenubutton.c
new file mode 100644
index 0000000..cdfdbfd
--- /dev/null
+++ b/gtk/gtkapplicationmenubutton.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright  2011 Canonical Ltd.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * licence, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ *
+ * Author: Ryan Lortie <desrt desrt ca>
+ */
+
+#include "config.h"
+
+#include "gtkapplicationmenubutton.h"
+
+#include "gtkapplicationwindow.h"
+#include "gtkbutton.h"
+#include "gtkmain.h"
+
+#include <string.h>
+
+struct _GtkApplicationMenuButton
+{
+  GtkButton parent_instance;
+
+  GtkSettings *settings;
+
+  gboolean user_shown;
+  gboolean required;
+};
+
+typedef GtkButtonClass GtkApplicationMenuButtonClass;
+
+G_DEFINE_TYPE (GtkApplicationMenuButton, gtk_application_menu_button, GTK_TYPE_BUTTON)
+
+static void
+gtk_application_menu_update_visibility (GtkApplicationMenuButton *amb)
+{
+  GtkWidget *widget = GTK_WIDGET (amb);
+  gboolean should_be_visible;
+  gboolean was_visible;
+
+  should_be_visible = amb->user_shown && amb->required;
+  was_visible = gtk_widget_get_visible (widget);
+
+  if (!was_visible && should_be_visible)
+    GTK_WIDGET_CLASS (gtk_application_menu_button_parent_class)->show (widget);
+
+  else if (was_visible && !should_be_visible)
+    GTK_WIDGET_CLASS (gtk_application_menu_button_parent_class)->hide (widget);
+}
+
+static void
+gtk_application_menu_button_clicked (GtkButton *button)
+{
+  GtkWidget *toplevel;
+
+  toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
+  if (toplevel != NULL && GTK_IS_APPLICATION_WINDOW (toplevel))
+    {
+      GtkWidget *menu;
+
+      menu = gtk_application_window_get_app_menu (GTK_APPLICATION_WINDOW (toplevel));
+      gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL,
+                      1, gtk_get_current_event_time ());
+    }
+}
+
+static void
+gtk_application_menu_button_show (GtkWidget *widget)
+{
+  GtkApplicationMenuButton *amb = GTK_APPLICATION_MENU_BUTTON (widget);
+
+  amb->user_shown = TRUE;
+
+  gtk_application_menu_update_visibility (amb);
+}
+
+static void
+gtk_application_menu_button_hide (GtkWidget *widget)
+{
+  GtkApplicationMenuButton *amb = GTK_APPLICATION_MENU_BUTTON (widget);
+
+  amb->user_shown = FALSE;
+
+  gtk_application_menu_update_visibility (amb);
+}
+
+static void
+gtk_application_menu_button_show_all (GtkWidget *widget)
+{
+  GtkApplicationMenuButton *amb = GTK_APPLICATION_MENU_BUTTON (widget);
+
+  gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL);
+  amb->user_shown = TRUE;
+
+  gtk_application_menu_update_visibility (amb);
+}
+
+static void
+gtk_application_menu_button_required_changed (GObject    *object,
+                                              GParamSpec *pspec,
+                                              gpointer    user_data)
+{
+  GtkApplicationMenuButton *amb = user_data;
+  gboolean required;
+
+  g_object_get (object, "gtk-shell-shows-app-menu", &required, NULL);
+  required = !required;
+
+  if (required != amb->required)
+    {
+      amb->required = required;
+
+      gtk_application_menu_update_visibility (amb);
+    }
+}
+
+static void
+gtk_application_menu_button_screen_changed (GtkWidget *widget,
+                                            GdkScreen *old_screen)
+{
+  GtkApplicationMenuButton *amb = GTK_APPLICATION_MENU_BUTTON (widget);
+  GtkSettings *settings;
+  GdkScreen *screen;
+
+  screen = gtk_widget_get_screen (widget);
+  settings = gtk_settings_get_for_screen (screen);
+
+  if (settings != amb->settings)
+    {
+      if (amb->settings)
+        {
+          g_signal_handlers_disconnect_by_func (amb->settings, gtk_application_menu_button_required_changed, amb);
+          g_object_unref (amb->settings);
+        }
+
+      amb->settings = g_object_ref (settings);
+      g_signal_connect (amb->settings, "notify::gtk-shell-shows-app-menu",
+                        G_CALLBACK (gtk_application_menu_button_required_changed), amb);
+      gtk_application_menu_button_required_changed (G_OBJECT (settings), NULL, amb);
+    }
+}
+
+static void
+gtk_application_menu_button_hierarchy_changed (GtkWidget *widget,
+                                               GtkWidget *previous_toplevel)
+{
+  GtkWidget *toplevel;
+
+  toplevel = gtk_widget_get_toplevel (widget);
+
+  if (toplevel != NULL && GTK_IS_APPLICATION_WINDOW (toplevel))
+    gtk_application_window_set_show_app_menu (GTK_APPLICATION_WINDOW (toplevel), FALSE);
+}
+
+static void
+gtk_application_menu_button_finalize (GObject *object)
+{
+  GtkApplicationMenuButton *amb = GTK_APPLICATION_MENU_BUTTON (object);
+
+  if (amb->settings)
+    {
+      g_signal_handlers_disconnect_by_func (amb->settings, gtk_application_menu_button_required_changed, amb);
+      g_object_unref (amb->settings);
+    }
+
+  G_OBJECT_CLASS (gtk_application_menu_button_parent_class)
+    ->finalize (object);
+}
+
+static void
+gtk_application_menu_button_init (GtkApplicationMenuButton *menu)
+{
+}
+
+static void
+gtk_application_menu_button_class_init (GtkApplicationMenuButtonClass *class)
+{
+  GtkButtonClass *button_class = GTK_BUTTON_CLASS (class);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  button_class->clicked = gtk_application_menu_button_clicked;
+
+  widget_class->show = gtk_application_menu_button_show;
+  widget_class->show_all = gtk_application_menu_button_show_all;
+  widget_class->hide = gtk_application_menu_button_hide;
+  widget_class->screen_changed = gtk_application_menu_button_screen_changed;
+  widget_class->hierarchy_changed = gtk_application_menu_button_hierarchy_changed;
+
+  object_class->finalize = gtk_application_menu_button_finalize;
+}
+
+GtkWidget *
+gtk_application_menu_button_new (void)
+{
+  return g_object_new (GTK_TYPE_APPLICATION_MENU_BUTTON, NULL);
+}
diff --git a/gtk/gtkapplicationmenubutton.h b/gtk/gtkapplicationmenubutton.h
new file mode 100644
index 0000000..9227c7a
--- /dev/null
+++ b/gtk/gtkapplicationmenubutton.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright  2011 Canonical Ltd.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * licence, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ *
+ * Author: Ryan Lortie <desrt desrt ca>
+ */
+
+#ifndef __GTK_APPLICATION_MENU_BUTTON_H__
+#define __GTK_APPLICATION_MENU_BUTTON_H__
+
+#include <gtk/gtkwidget.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_APPLICATION_MENU_BUTTON                    (gtk_application_menu_button_get_type ())
+#define GTK_APPLICATION_MENU_BUTTON(inst)                   (G_TYPE_CHECK_INSTANCE_CAST ((inst),                      \
+                                                             GTK_TYPE_APPLICATION_MENU_BUTTON,                        \
+                                                             GtkApplicationMenuButton))
+#define GTK_IS_APPLICATION_MENU_BUTTON(inst)                (G_TYPE_CHECK_INSTANCE_TYPE ((inst),                      \
+                                                             GTK_TYPE_APPLICATION_MENU_BUTTON))
+
+typedef struct _GtkApplicationMenuButton                    GtkApplicationMenuButton;
+
+GType                   gtk_application_menu_button_get_type           (void) G_GNUC_CONST;
+
+GtkWidget *             gtk_application_menu_button_new                (void);
+
+G_END_DECLS
+
+#endif /* __GTK_APPLICATION_MENU_BUTTON_H__ */