Path: utzoo!utgpu!water!watmath!clyde!bellcore!rutgers!orstcs!jasmerb
From: jasmerb@orstcs.CS.ORST.EDU (Bryce Jasmer)
Newsgroups: comp.sys.mac.programmer
Subject: flicker-free drawing
Keywords: Scott Knaster (god!)
Message-ID: <5727@orstcs.CS.ORST.EDU>
Date: 25 Jul 88 07:11:35 GMT
Organization: CS Dept, Oregon State University, Corvallis
Lines: 19

I am writing a DA that needs to have flicker free drawing so I found
and decided to use Scott Knaster's trick of letting the Tickcount change
before drawing. Here is the code:
-----
aLong:=tickcount;
while aLong = tickcount do
	;
EraseRect( {about 50 x 10 pixels} );
DrawString( {about 10-12 characters (9 point)} );
-----
It works great while the small window is at the bottom of my screen but
flickers more and more the closer you move the window to the top of the
screen. Since it is a DA, I am requesting my DA get a slice of time 
every 1/60 of a second.

What should I do?

Bryce Jasmer
jasmerb@jacobs.cs.orst.edu