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I want to have a small QFormLayout that grows to fill its parent widget.
I created a new .ui file using the QWidget template in Qt Designer. I put a QFormLayout inside that ‘window’, then put some controls inside that QFormLayout.
This all works reasonably well, but the QFormLayout always stays at the size I set in Qt Designer. I would like the QFormLayout to fill its parent widget and grow/shrink with it.
How can I accomplish that?
In Designer, activate the centralWidget and assign a layout, e.g. horizontal or vertical layout.
Then your QFormLayout will automatically resize.
Always make sure, that all widgets have a layout! Otherwise, automatic resizing will break with that widget!
See also