Layout issue: Widget cannot be resized below preferredSize
When I explicitly set the sceneRect on a QGraphicsScene, I suddenly cannot make the attached QGraphicsView smaller than that rectangle. When I let the GraphicsScene determine its sceneRect itself, I can make the view smaller, and get scrollbars.
Setting the sceneRect seems to cause the preferredSize to be set.
The GraphicsView has a size policy of Grow+Shrink+Expand in both directions, and a minimum size of 0/0.
Still, the QHBoxLayout managing it refuses to make it any smaller.