The Axis interface

Last modified on Tue May 11 17:05:11 PDT 1993 by swart

modified on Mon Nov 18 21:32:21 PST 1991 by gnelson

modified on Thu Nov 2 18:28:31 1989 by muller

modified on Mon Oct 2 09:13:50 1989 by kalsow

modified on Fri Jun 3 16:12:45 PDT 1988 by glassman

modified on Tue Mar 3 18:14:23 PST 1987 by luca

INTERFACE Axis;

IMPORT Word;

Axis.T.Hor and Axis.T.Ver are Trestle's names for the horizontal and vertical axes. Axis.Other exchanges Hor and Ver.

Index: screen, coordinate system

TYPE T = {Hor, Ver};

CONST Other = ARRAY T OF T {T.Ver, T.Hor};

PROCEDURE Compare (a, b: T): [-1 .. 1];

== RETURN (a - b)

PROCEDURE Equal (a, b: T): BOOLEAN;

== RETURN (a = b)

PROCEDURE Hash (a: T): Word.T;

== RETURN ORD (a)

END Axis.