class interface BITMAP_BUTTON_MOUSE
feature(s) from MOUSE_HANDLER
   --  Parent window
   parent: WINDOW
      --  Associated window.
feature(s) from MOUSE_HANDLER
   --  Mouse button status
   is_down: BOOLEAN
      --  Is the button down?
   point: POINT
      --  Current position of the mouse pointer.
invariant
   valid_point: point /= Void;
end of BITMAP_BUTTON_MOUSE