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From: kbj@jupiter.risc.com (Ken Johnson)
Newsgroups: comp.windows.open-look
Subject: Panels and events ( I think!!! )
Message-ID: <4nez4c5@openlook.Unify.Com>
Date: 9 Nov 90 00:23:20 GMT
Lines: 45


I have a base frame that contains a panel and three canvases.  The panel c
contains three buttons and four text items.  Basically everything works,
but, as always, I need improved functionality and I can't figure out how to 
do it. Here's what I have and then what I want.

1) One of the menuitem call back procedures launches a compute intensive 
procedure that calls three canvas repaint procedures every few seconds.
This takes about 100 times.  When in the compute routine the panel items
are dead - except that the 4 text tiems are updated by the compute
routine.

This scenario is OK most of the time.  Sometimes I want to interrupt the
compute routine - this is what the 'pause' button on the panel is supposed
to do.  The problem is that it is dead during the time the compute routine
is busy.  

Questions:

1) Is there a call I can once every few seconds from inside my compute
routine that will service the panel?  This is the approach the
Mac seems to take.

2) What is the story with the panel_repaint_procedure?

3) Do I have to handle events myself?  God, I hope not?

4) Should I fork the compute process and send it signals?

Lions and Tigers and Bears Oh my....  What is most conventional and intelligent
way to do this?

/* ------ Another question ------ */

Ah, for get this.  I'll deal with it later.....

Ken J.

Ken Johnson                             Phone: 805-373-4487
Rockwell International Science Center   Comnet: 273-4487
1049 Camino Dos Rios A-18               e-mail: kbj@risc.com
Thousand Oaks, CA 91360

       If enough data is collected
                     anything may be proven by statistical methods....