Unable to drag items in QGraphicsView after reimplementing mousePressEvent

Question

here is the situation: I have QGraphicsView, QGraphicsScene and QGraphicsItem. When I do not implement mouse events, I can drag items. But when I implement in the QGraphicsView

class MyView: public QGraphicsView {
...
protected:
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mousePressEvent(QMouseEvent *event);
...
}

I can't drag items anymore.

Should I implement somehow Mouse events for the QGraphicsItem and translate them from the QGraphicsView?

Currently, in QGraphicsItem I don't have these methods and use defaults. Thank you.

Answer 1

You either implement the moving of QGraphicsItem yourself, or call super for mouseMoveEvent, mouseReleaseEvent and mousePressEvent to continue processing the events inside the QGraphicsScene.