Converts the relative position of @point into an absolute position. To 
        be used for event considerations, blitting is handled directly by the 
        Container().

def convert_point(self, point):
        '''
        Converts the relative position of @point into an absolute position. To 
        be used for event considerations, blitting is handled directly by the 
        Container().
        '''
        return self.container.convert_point(Vector(point) + self.pos)