How to make a Qt Widget grow with the window size?
Qt4AutoresizeQt DesignerQt4 Problem Overview
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?
Qt4 Solutions
Solution 1 - Qt4
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
> Controls insist on being too large, and won't resize, in QtDesigner
Solution 2 - Qt4
I found it was impossible to assign a layout to the centralwidget until I had added at least one child beneath it. Then I could highlight the tiny icon with the red 'disabled' mark and then click on a layout in the Designer toolbar at top.
Solution 3 - Qt4
The accepted answer (its image) is wrong, at least now in QT5. Instead you should assign a layout to the root object/widget (pointing to the aforementioned image, it should be the MainWindow
instead of centralWidget
). Also note that you must have at least one QObject
created beneath it for this to work. Do this and your ui will become responsive to window resizing.