resize a QMainWindow

Hi
I have some frames inside a QMainWindow central widget.
I want the window to auto resize as i show/hide the frames.
How do i manage this? I tried sizepolicy but didn't work.
Thanks

not sure but .. u can try resizeEvent() ..

I use this to resize widgets:

Code:

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QWidget::resize();

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Check it out here:
http://doc.trolltech.com/4.3/qwidget.html#size-prop

Set a proper layout to your central widget that contains the frames.

It's something like this: http://www.box.net/shared/57oakuculm

It grows as i show new frames ... but it does not shrink back!

What properties showld i be looking for?!