Moves the circle to the point x,y

def moveToPoint(self, xxx_todo_changeme1):
        """
        Moves the circle to the point x,y
        """
        (x,y) = xxx_todo_changeme1
        self.set_cx(float(self.get_cx()) + float(x))
        self.set_cy(float(self.get_cy()) + float(y))