Tidying.

[synfig.git] / synfig-studio / trunk / src / gtkmm / workarea.cpp

diff --git a/synfig-studio/trunk/src/gtkmm/workarea.cpp b/synfig-studio/trunk/src/gtkmm/workarea.cpp
index 41da0b5..fa017e6 100644 (file)
--- a/synfig-studio/trunk/src/gtkmm/workarea.cpp
+++ b/synfig-studio/trunk/src/gtkmm/workarea.cpp
@@ -7,6 +7,7 @@
 **     \legal
 **     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
 **     Copyright 2006 Yue Shi Lai
+**     Copyright (c) 2007 Chris Moore
 **
 **     This package is free software; you can redistribute it and/or
 **     modify it under the terms of the GNU General Public License as
@@ -809,6 +810,19 @@ WorkArea::~WorkArea()
                render_idle_func_id=0;
 }
 
+bool
+WorkArea::get_updating()const
+{
+       return App::single_threaded && async_renderer && async_renderer->updating;
+}
+
+void
+WorkArea::stop_updating(bool cancel)
+{
+       async_renderer->stop();
+       if (cancel) canceled_=true;
+}
+
 void
 WorkArea::save_meta_data()
 {
@@ -2173,6 +2187,12 @@ public:
 bool
 studio::WorkArea::async_update_preview()
 {
+       if (get_updating())
+       {
+               stop_updating();
+               return false;
+       }
+
        async_renderer=0;
 
        queued=false;