Quote Originally Posted by wysota
That's a really good question. Why do you want to solve it?
Sorry. The question was: How do I resolve it? I'd like resolve it because: 1. I think that there are 2 paint unuseful (with toolBox 3 paintGL(), without it, 1 paintGL()!); then because I think the cause is a QWidget/toolBox/stackWidget don't put good; (or maybe a bug?) Thanks