Fix a crash when running single-threaded and dragging the time slider.

git-svn-id: http://svn.voria.com/code@916 1f10aa63-cdf2-0310-b900-c93c546f37ac

diff --git a/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp b/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
index d0717bb..c558960 100644 (file)
--- a/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
+++ b/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
@@ -258,6 +258,11 @@ static double zoom_to_unit(double f)
 
 bool studio::Widget_NavView::on_expose_draw(GdkEventExpose */*exp*/)
 {
+       // don't redraw if the previous redraw is still running single-threaded
+       // or we end up destroying the renderer that's rendering it
+       if (App::single_threaded && renderer && renderer->updating)
+               return false;
+
        //print out the zoom
        //HACK kind of...
        //zoom_print.set_text(strprintf("%.1f%%",100*unit_to_zoom(adj_zoom.get_value())));