I have a class derived from QGraphicsView, which contains QGraphicsItem-derived elements. I want these elements to change color whenever the mouse cursor hovers over them, so I implemented hoverEnterEvent (and hoverLeaveEvent):

void MyGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
{
    update (boundingRect());
}

However, this event handler code is never executed. I've explicitly enabled mouse tracking:

MyGraphicsView::MyGraphicsView(MainView *parent) :
    QGraphicsView(parent)
{
    setMouseTracking(true);
    viewport()->setMouseTracking(true);
    ...
}

Still, no luck. What am I doing wrong?