MousePressEvent, position offset in QGraphicsView

MousePressEvent, position offset in QGraphicsView

Reimplement

mousePressEvent

on the scene, rather than the view.

That way, the

event

argument will be a

QGraphicsSceneMouseEvent

, which has several useful
additional functions - including

scenePos

, which does exactly
what you want:

class graphicsScene(QtGui.QGraphicsScene):    def __init__ (self, parent=None):        super(graphicsScene, self).__init__ (parent)    def mousePressEvent(self, event):        super(graphicsScene, self).mousePressEvent(event)        item = graphicsItem()        position = QtCore.QPointF(event.scenePos()) - item.rectF.center()        item.setPos(position.x() , position.y())        self.addItem(item)