modules/javafx.graphics/src/main/native-glass/gtk/GlassApplication.cpp

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -514,10 +514,12 @@
                     gtk_main_do_event(event);
                     break;
                 default:
                     break;
             }
+            // update GTK structures to receive the synchronous changes
+            gdk_display_sync(gdk_display_get_default());
         } catch (jni_exception&) {
         }
     } else {
 
         if (window == gdk_screen_get_root_window(gdk_screen_get_default())) {