Ugly move with a top-level setMasked widget

[nooky59]

Yes, I know but in the Qt 4 with C++ book even if they said that double-buffering is handled by Qt, they showed a useful example about how to do it so it seems that it can be useful to do it yourself sometimes.

Hmm, I'm sad, setting the opacity product a different problem rendering but it's not perfect at all. It's very strange, if I move the top-level masked widget on the windows desktop, it's perfect even if I move fastly.

I really don't know if there is something to do. With WinAMP, it's the same problem. I don't know which technology they use to program it but I don't think this is Qt. So the problem is the same, with small fancy skin, WinAMP move smoothly on others apps but as soon as the skin is tricky and big, the problem is the same.

I think it's too related to the computer (even if I'm running a NVidia GeForce FX 5200 here) cause I think the problem is present but lesser on my laptop.