[gtk+] GtkButton: Also handle activate from mouse events.

[Carlos Garnacho <carlosg src gnome org>]

commit bddb72476c343a0a62ea29d6dd3670eff16293c7
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Aug 17 15:43:08 2010 +0200

    GtkButton: Also handle activate from mouse events.

 gtk/gtkbutton.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkbutton.c b/gtk/gtkbutton.c
index e9527c1..d9d1047 100644
--- a/gtk/gtkbutton.c
+++ b/gtk/gtkbutton.c
@@ -1827,6 +1827,9 @@ gtk_real_button_activate (GtkButton *button)
   priv = GTK_BUTTON_GET_PRIVATE (button);
   device = gtk_get_current_event_device ();
 
+  if (device && device->source != GDK_SOURCE_KEYBOARD)
+    device = gdk_device_get_associated_device (device);
+
   g_return_if_fail (device && device->source == GDK_SOURCE_KEYBOARD);
 
   if (gtk_widget_get_realized (widget) && !button->activate_timeout)