QMainWindow - strange behaviour

[franco.amato]

Hi to all,
I'm writing an application that uses a QMainWindow.
The application starts as maximized but when I resize it with the system windows button
the size change drastically and the application become very very little.
How can I control this behaviour?

Best Regards

[franco.amato]

Nobody want reply to this post? Or it's considered as trivial?

Regards