= Pointer: state of a pointer device such as a mouse     include   "draw.m";    draw := load Draw Draw->PATH;     Pointer: adt    {        buttons:  int;        xy:       Point;    }; buttons   Each  button  on the device corresponds to a bit in          buttons; zero bits indicate released (or  non-exis‐          tent),  and  one  bits indicate pressed.  The bits,          from least to most significant positions, represent          the buttons from left to right. xy        The pointer's screen coordinates. Mux(1)  uses the cptr member of the Draw->Context adt to passpointer events through to applications. == see ALSOdevpointer(2), mouse in tk(2)