qt - How to override dragMoveEvent in QGraphicsScene with the same functionality

I derived a class from QGraphicsScene. Then I overrided the dragMoveEvent. But now I cant move 开发者_运维技巧any items in my QGraphicsScene. Somebody please help me to create the dragging movement.

IIRC you can call directly call the overridden method by QGraphicsScene::dragMoveEvent from your own function.