[Cyan]<ISLCedar>JaMObjectEdit>ObjectEditJaM.mesa!1

File: ObjectEditJaM.mesa

Written by: John Warnock

Last Updated by Michael Plass: March 28, 1983 2:13 pm

Last Updated by Maureen Stone March 28, 1983 2:54 pm

DIRECTORY

Graphics USING [Context, Save, Restore, WorldToUser, UserToWorld, SetPaintMode, SetColor, DrawBox, black, white],

JaMFnsDefs USING [GetReal, Register],

TJaMGraphics USING [Painter];

ObjectEditJaM: PROGRAM IMPORTS Graphics, JaMFnsDefs, TJaMGraphics =

{OPEN Graphics;

DotToken: PUBLIC PROC= {

x, y, xd, yd, xl1, yl1, xl2, yl2, xu1, yu1, xu2, yu2: REAL;

Paint: PROC [dc: Context] = {

[xd, yd] ← UserToWorld[dc, x, y];

[xl1, yl1] ← WorldToUser[dc, xd-3, yd-3];

[xl2, yl2] ← WorldToUser[dc, xd-2, yd-2];

[xu1, yu1] ← WorldToUser[dc, xd+3, yd+3];

[xu2, yu2] ← WorldToUser[dc, xd+2, yd+2];

[] ← Save[dc];

[] ← SetPaintMode[dc, opaque];

SetColor[dc, black];

DrawBox[dc, [xmax: xu1, ymax: yu1, xmin: xl1, ymin: yl1]];

SetColor[dc, white];

DrawBox[dc, [xmax: xu2, ymax: yu2, xmin: xl2, ymin: yl2]];

Restore[dc];

};

y ← JaMFnsDefs.GetReal[];

x ← JaMFnsDefs.GetReal[];

TJaMGraphics.Painter[Paint];

};

JaMFnsDefs.Register[".dottoken", DotToken];