https://forum.qt.io/topic/20298/qgraphicsscenewheelevent-delta-being-called-when-mouse-wheel-isn-t-used
QGraphicsSceneWheelEvent::delta being called when mouse wheel isn't used | Qt Forum
Oct 4, 2012 - I have a performance problem with a Qt widget application. Intel VTune Amplifier suggests the issue is with QGraphicsSceneWheelEvent::delta() being called al...
https://doc.qt.io/qt-6/ja/qgraphicsscenewheelevent-members.html
List of All Members for QGraphicsSceneWheelEvent | Qt Widgets | Qt 6.11.0
The QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.
list of all members