The essential steps are: The container widget that holds the buttons (your CheckableButtonGroup) must have a QLayout::SetMinAndMaxSize size constraint set. Then it will be exactly large enough to hold the buttons. Its size policy doesn’t matter, since you’re simply putting it into a QScrollArea, not into another layout. The scroll area needs to set its … Read more
If you’re coming here from Google and not having luck with the accepted answer, that’s because you’re missing the other secret invocation: QScrollArea::setWidget. You must create and explicitly identify a single widget which is to be scrolled. It’s not enough to just add the item as a child! Adding multiple items directly to the ScrollArea … Read more
Since many questions wonder how to use a QScrollArea that many widgets have, I will take the license to explain the various forms in detail and use them as a canonical answer for future readers. QScrollArea only allows placing a container widget so the other widgets must be placed as children of the container widget. … Read more