title: How to distinguish between mouseReleaseEvent and mousedoubleClickEvent on QGraphicsScene
body: <p>I am overriden <code>QGraphicsScene</code> and overload 2 methods: <code>mouseDoubleClickEvent</code> and <code>mouseReleaseEvent</code>. I want different logic executing on each of this event, but I do not know how to distinguish it? At least 1 <code>mouseReleaseEvent</code> occured before <code>mouseDoubleClickEvent</code>.</p>