code: def get_datarect(self):
          
          x1, y1, x2, y2 = self._org_x1, self._org_y1, self._org_x2, self._org_y2
          return (x1, y1, x2, y2)
docs: Get the approximate bounding box of the displayed image.
  
          Returns
          -------
          rect : tuple
              Bounding box in data coordinates in the form of
              ``(x1, y1, x2, y2)``.