Hello at all!

I'm working with Qt 4 in c++ for a few weeks and I really love it!
Now I have a question and I hope somebody can help me with that.

In Qt Designer, the user can resize widgets with the mouse. Also you
can resize your graphics in many other programs, like webapplications
or MS Word and Paint.
Is there a widget in Qt 4 that can contain another widget and enable
the user to resize the contained widget with the mouse?

paint.png

Thank you very much!