From 469db76712fa4ac46df6f04e5be92ef87d1674a9 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sat, 3 Nov 2007 21:46:55 +0000
Subject: [PATCH] handle failure of gtk_drag_begin() (which can happen e.g.
 because gdk_pointer_grab() failed) in DoDragDrop() (patch 1825237) + minor
 cleanup in trunk version of the code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@49608 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/gtk/dnd.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp
index 0733a6e2e4..ce1c92472a 100644
--- a/src/gtk/dnd.cpp
+++ b/src/gtk/dnd.cpp
@@ -901,6 +901,16 @@ wxDragResult wxDropSource::DoDragDrop(int flags)
                 g_lastButtonNumber,  // number of mouse button which started drag
                 (GdkEvent*) g_lastMouseEvent );
 
+    if ( !context )
+    {
+        // this can happen e.g. if gdk_pointer_grab() failed
+        g_blockEventsOnDrag = false;
+
+        UnregisterWindow();
+
+        return wxDragError;
+    }
+
     m_dragContext = context;
 
     PrepareIcon( action, context );