- color_thread->close_window();
- outline_color_thread->close_window();
- color_popup->close_window();
- png_popup->close_window();
+ delete color_thread; color_thread = 0;
+ delete outline_color_thread; outline_color_thread = 0;
+ delete color_popup; color_popup = 0;
+ delete png_popup; png_popup = 0;
+