就是对这个contextMenuEvent 事件重新实现，在这个事件函数中创建菜单，大概就是这样。
1 void MyItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) 2 { 3 QMenu *menu = new QMenu; 4 menu->addAction("Action 1"); 5 menu->addAction("Action 2"); 6 menu->popup(event->screenPos()); 7 8 connect(menu, SIGNAL(triggered(QAction *)), 9 object, SLOT(triggered(QAction *))); 10 }
referrences：
http://www.qtcentre.org/threads/5187-Popup-menu-for-a-QGraphicsItem
http://stackoverflow.com/questions/19868383/how-to-handle-right-mouse-click-event-for-qgraphicsitem
原文：http://www.cnblogs.com/foohack/p/4544081.html
