I have a QSplitter with one large widget followed by few small ones. When a new widget is added, the small ones are shrunk below their recommended sizeHint() even though the large one still has much more space than its sizeHint().

Can I change this behaviour? Do I need to use QSplitter::setSizes() to do that and if so, how to detect that some widget was added/removed/resized?

I want the widgets to be freely resizable, so using setFixedHeight() is not an acceptable solution.

For example, I have two widgets with preferred height 200px (first screenshot). When I add the third one, it takes more than preferred height, shrinking the others even though all could have their preferred height.

CodePudding user response：

Try QSplitter::setStretchFactor(index, factor);. For example set factor=0 for first widget and factor=1 for rest of the widgets.

You can install event filter and filter for QEvent::LayoutRequest to detect that some widget was added/removed, although it can be fired for other reasons too.