So the poster is wrong?

Then what is the correct way to prevent items from being selected in a QGraphicsScene if my graphics scene is in a state where I don't want the user to be able to select items? I override the default implementation of QGraphicsScene::mousePressEvent, QGraphicsScene::mouseMoveEvent and QGraphicsScene::mouseReleaseEvent when the scene is in a non-select state and I don't call the base class implementation. Still, I'm able to select items that have QGraphicsItem::ItemIsSelectable enabled by double-clicking them. How do I properly prevent items from being selected in a non-select state?