@raven-worx I will look into platform specific code. Thank you.

@Wilk said:

The reason that it did not work with QMainWindow or QWidget is that those classes does not implement fullScreen as full featured property - it can not be set with setFullScreen() slot.

I see, thanks for the precision.

@Wilk said:

Thanks alot

No problem, I hope your bug report will be helpful for other people.