John Cupitt <john.cupitt@xxxxxxxxxxxxxxxx> writes: > One of the app's widgets is an image display window, and one of the > tools is a panner. Pure left/right and up/down pans are fast and > smooth, but diagonal drags are very choppy. I think this is because > gtk is sending me the bounding box of all exposes since the last > repaint, and for a diagonal drag, the bounding box of a thin strip > down the right and a thin strip across the bottom is the entire > window. Has anyone come across this before, and is there an easy > solution? If your problem is as you describe (which may well be the case), then look at the "region" field in the expose event. That field will contain a GdkRegion indicating the exact area that needs to be painted. You can use gdk_region_get_rectangles() to convert the region to a list of rectangles that needs to be repainted. Soren _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
