i have already used setMouseTracking() for view. but still its not working. In Qt Asistant i have checked description of setAcceptHoverEvents(). i.e.
Hover events are commonly used to highlight an item when it's entered, and for tracking the mouse cursor as it hovers over the item (equivalent to QWidget::mouseTracking).

But setAcceptHoverEvents() doesn't act exactly as setMouseTracking()