GraphicsView performance problems

**Gopala Krishna** · 17th February 2007, 10:09

As I already pointed out that performance is better without those nodes and textitems as children. Does that mean drawBackground() is being called twice for same area ? Does the framework lack any optimization in calculating this before hand ?

**rajesh** · 17th February 2007, 10:14

drawBackground() get called every time whenever your window painted, means when ever you move window or resize..

**Gopala Krishna** · 17th February 2007, 10:29

Originally Posted by rajesh

drawBackground() get called every time whenever your window painted, means when ever you move window or resize..

No. That is just one of the case. drawBackground() is called always before updating the required item(eg when its moved) with the probably the item's bounding rect. You can check that by just printing something say qDebug() << rect; in the method.