QGraphicsScene::setSceneRect() does not update immediately

[jj382]

Setting scene rectangle using QGraphicsScene::setSceneRect() ocasionally does not result in change of the scene until after a resize event takes place.

Questions:

1. Why is this the case?
2. How can I force the QGraphicsScene to respect the scene assigned to it immediately

[jj382]

(One?) Solution is to call QGraphicsView( QRectF ) with QRectF obtained from QGraphicsScene::sceneRect() immediately after assigning a new scene rectangle.