Tracks whether or not this item is being hovered.
        
        :param      event | <QEvent>

def hoverLeaveEvent( self, event ):
        """
        Tracks whether or not this item is being hovered.
        
        :param      event | <QEvent>
        """
        super(XChartWidgetItem, self).hoverEnterEvent(event)
        
        self._hoveredPath = None
        self.update()