On Tue, 2009-01-13 at 09:53 +0100, Gunnar Sletta wrote: > > First of all I'm wondering whether this is a known problem (with a known > > solution)? > > Many moving items in a scene is a common degenerate usecase for the > default configuration of QGraphicsView. You can change the viewport > update mode to do a full viewport update, in which case less time is > spent in figuring out collisions etc...
Unfortunately, this does not help at all as in my case. Yes, I do have many moving items. Yet, these items are so small that only a tiny fraction of the graphics view has to be redrawn (imagine many 5x5 pixel cars on a full screen street map). Switching to full viewport update mode doesn't make things go any faster as then too much time is spent on actually redrawing graphics items (streets) which actually do not have to be redrawn. So I end up with about the same performance as with the normal update setup. Any suggestions? Regards, Matthias _______________________________________________ Qt-jambi-interest mailing list [email protected] http://lists.trolltech.com/mailman/listinfo/qt-jambi-interest
