title: Qt mapToGlobal and multiple screens. How do they interact?
body: <p>I don't understand how mapToGlobal interacts with a multiple screen setup. Is it returning the global position relative to that particular screen, or to the whole desktop? </p>
  
  <p>If I invoke QCursor.setPos(widget.mapToGlobal(widget.geometry().topLeft()) will I always end up with the pointer in the top left corner of the widget, regardless of any multiscreen situation?</p>