X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-studio%2Ftrunk%2Fsrc%2Fgtkmm%2Fdock_navigator.cpp;h=c558960bff46ea9d1be22d48b94c09d7789a2e49;hb=5f937f1d74ccc6dc54f876e62cdea574e7cb56bf;hp=f002b66d6d42064d5fef442a2271146b1608eb0c;hpb=c3ad95144d148602f672e95ddda1f18fc35502f8;p=synfig.git

diff --git a/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp b/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
index f002b66..c558960 100644
--- a/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
+++ b/synfig-studio/trunk/src/gtkmm/dock_navigator.cpp
@@ -6,6 +6,7 @@
 **
 **	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	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
@@ -166,8 +167,8 @@ void studio::Widget_NavView::on_start_render()
 
 		renderer = new AsyncRenderer(targ);
 		renderer->signal_success().connect(sigc::mem_fun(*this,&Widget_NavView::on_finish_render));
-		renderer->start();
 		dirty = false;
+		renderer->start();
 	}
 }
 
@@ -257,6 +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())));