def setDragData(self, data, x=None, y=None):
        """
        Sets the drag data for this chart item to the inputed data.
        
        :param      data | <QMimeData> || None
        """
        self._dragData[(x, y)] = data
def setDragData ( self , data , x = None , y = None ) : self . _dragData [ ( x , y ) ] = data
Sets the drag data for this chart item to the inputed data.
        
        :param      data | <QMimeData> || None