QSwipeGesture with mouse to control qstackedwidget

[QtTester]

Hi ,all :
here are some topic:
https://forum.qt.io/topic/18129/solved-how-to-implement-qpangesture-and-qswipegesture-for-touch-screen-desktop-programming
https://forum.qt.io/topic/27422/solved-qswipegesture-implementation-on-desktop

seems they don't sloved. on stackoverflow, i try and it work with pangesture:
https://stackoverflow.com/questions/49287314/qgestureevent-for-mouse
and i modify as swipegesture, but nothing happen:

        if(mouse->type() == QMouseEvent::MouseButtonPress){
            QSwipeGesture * gesture = qobject_cast<QSwipeGesture*>(state);

            if(gesture != 0){
                m_panning = true;
                m_startpoint = mouse->pos();
                gesture->setSwipeAngle(0.0);
                return TriggerGesture;
            }
        }
        if(m_panning && (mouse->type() == QMouseEvent::MouseMove)){
            QSwipeGesture * gesture = qobject_cast<QSwipeGesture*>(state);

            if(gesture != 0){
                float_t a = twoPointDegree(mouse->pos() , m_startpoint);
                gesture->setSwipeAngle(a);
                return TriggerGesture;
            }
        }
        if(mouse->type() == QMouseEvent::MouseButtonRelease){
            QSwipeGesture * gesture = qobject_cast<QSwipeGesture*>(state);

            if(gesture != 0){
                QPointF endpoint = mouse->pos();
                if(m_startpoint == endpoint){
                    return CancelGesture;
                }
                m_panning = false;
                float_t a = twoPointDegree(mouse->pos() , m_startpoint);
                gesture->setSwipeAngle(a);
                return FinishGesture;
            }
        }

anyone can help?