X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-studio%2Ftrunk%2Fsrc%2Fgtkmm%2Fdock_navigator.cpp;h=c558960bff46ea9d1be22d48b94c09d7789a2e49;hb=806f63e7b631aff78434eda0ee3c23b168dcd648;hp=d0717bba368f7c6153fbd1e5315ffb394a3314c2;hpb=db49fa613552bf53c58d019ce204b84234ac27f7;p=synfig.git

diff --git a/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp b/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
index d0717bb..c558960 100644
--- 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())));