[gtk+/multitouch: 65/124] gtk, menu: Don't popdown submenus on button release for touch devices

[Carlos Garnacho <carlosg src gnome org>]

commit 894bc5f34cf16695376e58e7484a08a946f64f94
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Dec 12 20:07:57 2011 +0100

    gtk,menu: Don't popdown submenus on button release for touch devices
    
    This is so submenus stay open as the parent menu item is pressed/released,
    as the user would typically lift the finger in order to select a submenu
    item.

 gtk/gtkmenu.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkmenu.c b/gtk/gtkmenu.c
index b5d2ab1..77e0daa 100644
--- a/gtk/gtkmenu.c
+++ b/gtk/gtkmenu.c
@@ -3349,9 +3349,17 @@ static gboolean
 gtk_menu_button_press (GtkWidget      *widget,
                        GdkEventButton *event)
 {
+  GdkDevice *source_device;
+  GtkWidget *event_widget;
+  GtkMenu *menu;
+
   if (event->type != GDK_BUTTON_PRESS)
     return FALSE;
 
+  source_device = gdk_event_get_source_device ((GdkEvent *) event);
+  event_widget = gtk_get_event_widget ((GdkEvent *) event);
+  menu = GTK_MENU (widget);
+
   /*  Don't pass down to menu shell if a non-menuitem part of the menu
    *  was clicked. The check for the event_widget being a GtkMenuShell
    *  works because we have the pointer grabbed on menu_shell->window
@@ -3359,10 +3367,16 @@ gtk_menu_button_press (GtkWidget      *widget,
    *  the menu or on its border are delivered relative to
    *  menu_shell->window.
    */
-  if (GTK_IS_MENU_SHELL (gtk_get_event_widget ((GdkEvent *) event)) &&
+  if (GTK_IS_MENU_SHELL (event_widget) &&
       pointer_in_menu_window (widget, event->x_root, event->y_root))
     return TRUE;
 
+  if (GTK_IS_MENU_ITEM (event_widget) &&
+      gdk_device_get_source (source_device) == GDK_SOURCE_TOUCH &&
+      GTK_MENU_ITEM (event_widget)->priv->submenu != NULL &&
+      !gtk_widget_is_drawable (GTK_MENU_ITEM (event_widget)->priv->submenu))
+    menu->priv->ignore_button_release = TRUE;
+
   return GTK_WIDGET_CLASS (gtk_menu_parent_class)->button_press_event (widget, event);
 }