https://bugzilla.mozilla.org/show_bug.cgi?id=1339758
1339758 - Accessing offsetX/offsetY on MouseEvents dispatched from click() is slower than in other...
https://forum.qt.io/topic/82046/why-do-i-not-get-any-mouseevents-in-a-qgraphicsitem-derived-class
Why do I not get any MouseEvents in a QGraphicsItem derived class? | Qt Forum
Aug 6, 2017 - Hey, I have a QGraphicsView, which displays a QGraphicsScene in a tabWindget. In this scene I can add QGraphicsItems by clicking on it (class called Node). I...