sizeHint()

[Gopala Krishna]

I have a basic question about sizeHint. I have read thru the Qt documentation but I still don't know how to use sizeHint. Never have I been able to compile anything that has sizeHint() in it. I'd like to know what is the proper use of sizeHint.
For example if I want sizeHint to take care of the size of my application's window, how do I use it? Let's assume that I want the size always to be between 200x200 and 300x300 but as small as possible at the same time. What does the command look like when in action? I have not been able to find any relevant exaples online either. Thanks for help.

You can use QWidget::minimumSizeHint() to return the minimum recommended size for your window and QWidget::sizeHint() to return the recommended size.

These properties are used by QLayout's to take care of the geometry of the widgets. QLayout won't resize widgets lesser than it's min size hint.

Also you can control how the widgets should behave in various circumstances(eg when there is extra space ) by using QSizePolicy.
See also QWidget::sizePolicy