Copyright 1992 Digital Equipment Corporation.
Distributed only by permission.
Last modified on Sun Jul 19 19:26:53 1992 by mhb
<* PRAGMA LL *>
A ChipsVBT continuously displays an [1..C]x[1..R] array of
colored rectangles representing values [1..N]. The rectangle
at the lower left is (1,1), and one at the upper right is
(C,R) the This VBT class gets its name from the collection of
``paint chips'' it resembles.
INTERFACE ChipsVBT;
IMPORT RectsVBT;
TYPE
T <: Public;
Public = RectsVBT.T OBJECT METHODS init ():T END;
PROCEDURE Reset (v: T; C, R, K: INTEGER);
<* LL.sup < v *>
Clear the current display and get ready to show [1..R] rows of
[1..C] chips per row, each displaying a value in [1..K].
PROCEDURE Set (v: T; c, r, k: INTEGER);
<* LL.sup < v *>
Set the value of chip at column c in row r to be k and
display it appropriately. If any of the values are out of
bounds, this call is a noop.
END ChipsVBT.