[gtk+/xi2] GtkPaned: stop drag if grab device is shadowed.

[Carlos Garnacho <carlosg src gnome org>]

commit 0ffb3c6a659e76f96e0ad89a7d72cf8aa1f0164e
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Mar 9 18:22:31 2010 +0100

    GtkPaned: stop drag if grab device is shadowed.

 gtk/gtkpaned.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkpaned.c b/gtk/gtkpaned.c
index 8a47d91..68aa6f5 100644
--- a/gtk/gtkpaned.c
+++ b/gtk/gtkpaned.c
@@ -1271,8 +1271,12 @@ gtk_paned_grab_notify (GtkWidget *widget,
 		       gboolean   was_grabbed)
 {
   GtkPaned *paned = GTK_PANED (widget);
+  GdkDevice *grab_device;
 
-  if (!was_grabbed && paned->in_drag)
+  grab_device = paned->priv->grab_device;
+
+  if (paned->in_drag && grab_device &&
+      gtk_widget_device_is_shadowed (widget, grab_device))
     stop_drag (paned);
 }