[gtk+] Deal with events from wrong display

[Matthias Clasen <matthiasc src gnome org>]

commit e367c4baa0395c9cc7e7fafc70459c9e63b66322
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jun 15 19:46:33 2015 -0400

    Deal with events from wrong display
    
    GtkInspector is opening a separate display connection, which makes
    it more likely that gtk_get_current_event() returns an event from
    the "wrong" display.

 gtk/gtkmenu.c       |    8 ++++++--
 gtk/gtkmenubutton.c |    3 ++-
 2 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkmenu.c b/gtk/gtkmenu.c
index 7219953..21a737e 100644
--- a/gtk/gtkmenu.c
+++ b/gtk/gtkmenu.c
@@ -1535,20 +1535,24 @@ gtk_menu_popup_for_device (GtkMenu             *menu,
   gboolean grab_keyboard;
   GtkWidget *parent_toplevel;
   GdkDevice *keyboard, *pointer, *source_device = NULL;
+  GdkDisplay *display;
 
   g_return_if_fail (GTK_IS_MENU (menu));
   g_return_if_fail (device == NULL || GDK_IS_DEVICE (device));
 
+  display = gtk_widget_get_display (GTK_WIDGET (menu));
+
   if (device == NULL)
     device = gtk_get_current_event_device ();
 
+  if (device && gdk_device_get_display (device) != display)
+    device = NULL;
+
   if (device == NULL)
     {
-      GdkDisplay *display;
       GdkDeviceManager *device_manager;
       GList *devices;
 
-      display = gtk_widget_get_display (GTK_WIDGET (menu));
       device_manager = gdk_display_get_device_manager (display);
       devices = gdk_device_manager_list_devices (device_manager, GDK_DEVICE_TYPE_MASTER);
 
diff --git a/gtk/gtkmenubutton.c b/gtk/gtkmenubutton.c
index 17c822b..2126087 100644
--- a/gtk/gtkmenubutton.c
+++ b/gtk/gtkmenubutton.c
@@ -398,7 +398,8 @@ popup_menu (GtkMenuButton *menu_button,
         break;
   }
 
-  if (event)
+  if (event != NULL &&
+      gdk_event_get_screen (event) == gtk_widget_get_screen (GTK_WIDGET (menu_button)))
     {
       device = gdk_event_get_device (event);
       gdk_event_get_button (event, &button);