Hi, everyone, I have countered a problem : How can both graphcisView and graphicsItem
receive mousemoveEvent?
Because I have carried out that the graphicsView to track mouse move postion, througth QGraphcisView::mouseMoveEvent(QMouseEvent * event);

And I also carried out that the graphcisItem to zoom out the graph by choose a rubberband rect, through QGraphicsItem::mousePressEvent(QGraphicsSceneMouse Event *event) ,QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouse Event *event),
QGraphicsItem::mouseReleaseEvent(QGraphicsSceneMou seEvent *event) .This can be realized only when i remove the QGraphcisView::mouseMoveEvent(QMouseEvent * event) in the QGraphicsView class.

Last I found that ,if i don't remove the QGraphcisView::mouseMoveEvent(QMouseEvent * event) in the QGraphicsView class,then the graph can realize the mouse position tracking,which means that the QGraphicsView class has grab the mouseMove event, and then i press the button and try to select a rubberband rect ,then it doesn't succeed!

Now i both need the mouse tracking and rubberband zoom . how can both the QGraphicsView class and QGraphcisItem class receive mousemove event ?

Wish anyone's preciously adivce! Thank you!