code: def getMouse(self):
          
          # FIXME: this isn't working during an executing cell
          self.mouse_x.value = -1
          self.mouse_y.value = -1
          while self.mouse_x.value == -1 and self.mouse_y.value == -1:
              time.sleep(.1)
          return (self.mouse_x.value, self.mouse_y.value)
docs: Waits for a mouse click.