Frameless Translucent QMainWindow with animation

[frankois]

Hello Every one.

I'm trying to add some animation on a translucent QMainWindow.

I have 2 panels I want to open but apparently the background doesn't repaint correctly (even without animation, ...) (see the picture).

I tried to force it (->repaint) but nothing happened. do I something wrong?

http://image.noelshack.com/fichiers/2013/25/1371728926-capture.png

My env :
MacOS 10.8.4
QT 5.1.0-rc1-clang-offline-2013-06-16-59

It's the snapshot because in the previous versions there is a bug about translucent background window.

Thanks
.