[Coco] multiple windows on a screen in Basic09

[Wayne Campbell]

Hi Bob,

 The error is in the OPEN statement. You are opening #wpath1 and #wpath2 
both to /w1. #wpath2 needs to be /w2.

Wayne

----- Original Message ----- 
From: "Bob Devries" <devries.bob at gmail.com>
To: <coco at maltedmedia.com>
Sent: Thursday, January 14, 2010 1:53 PM
Subject: [Coco] multiple windows on a screen in Basic09



> Hi all,

>

> I have been trying to emulate what Wayne Campbell is trying to do, that 

> is, to have two active windows on a single screen using Basic09.

>

> Now I know that this is possible, since there was an example shell script 

> on the original OS9 System disk called "window.glr4". This script produced 

> three active windows on a graphics screen, and opened a shell in two of 

> them.

>

> I'm trying to emulate this in Basic09, but so far, no luck.

>

> Here's what I have:

>

> PROCEDURE twowin

> DIM x:INTEGER

> DIM a$:STRING[80]

> DIM wpath1,wpath2:BYTE

> OPEN #wpath1,"/w1":UPDATE

> OPEN #wpath2,"/w1":UPDATE

> RUN gfx2(wpath1,"DWSet",2,0,0,80,20,0,1,1)

> RUN gfx2(wpath2,"DWSet",0,0,21,80,4,2,3)

> RUN gfx2(wpath1,"Select")

> PRINT #wpath1,"Output window"

> RUN gfx2(wpath2,"Select")

> PRINT #wpath2,"Input window"

> INPUT #wpath2,"Type a line",a$

> RUN gfx2(wpath1,"Select")

> PRINT #wpath1,a$

> RUN gfx2(wpath2,"Select")

> RUN gfx2(wpath2,"CurXY",0,0)

> RUN gfx2(wpath2,"Clear")

> FOR x=1 TO 10000

> NEXT x

> RUN gfx2(wpath2,"DWEnd")

> RUN gfx2(wpath1,"DWEnd")

> CLOSE #wpath2

> CLOSE #wpath1

> END

>

> The code when run, gives an error 184, "Window already defined". I have 

> also tried 255 as the first parameter (window type), to no avail.

>

> According to the Basic09 manual, the use of 0 and 255 are special case 

> window types, "0" specifies the current screen, and 255 "Current display 

> screen. Use when putting several windows on the same physical screen" 

> (Basic09 Reference, page 9-34)

>

> Has anyone else ever tried this? Since it's possible using a shell script, 

> in my view it _should_ be possible using Basic09.

>

> Regards, Bob Devries

>

> --

> Besides a mathematical inclination, an exceptionally good mastery of one's 

> native tongue is the most vital asset of a competent programmer.

>

> Edsger W.Dijkstra, 18 June 1975

>

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