Path: utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!helios.ee.lbl.gov!nosc!ucsd!rutgers!apple!kazim
From: kazim@Apple.COM (Alex Kazim)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Text Drawing at speeds greater than 1200baud
Summary: Quick fix
Keywords: Microphone, VersaTerm, scrolling
Message-ID: <24499@apple.Apple.COM>
Date: 21 Jan 89 22:01:02 GMT
References: <2243@uokmax.UUCP> <27572@ucbvax.BERKELEY.EDU> <18791@santra.UUCP>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 33

In article <18791@santra.UUCP> jmunkki@kampi.UUCP (Juri Munkki) writes:
>
>No objections here. I do not restrain my windows, but the effect on speed
>is visible on a MacPlus. This is because I use an offscreen bitmap to
>contain my text screens. If the bitmap and the window are not exactly
>aligned, QD has to do a lot of bit-shifting.  Zooming the window positions
>it intelligently to a word boundary (I plan to document this feature in the
>manual).

I can't say I like this approach -- window sizing is in the power of
the user, and the program shouldn't limit the the size to boundaries.
This would confuse a novice, because your windows will not work like
other applications...

>
>up. Most terminal programs do not do update their windows even when they
>really should. Try ls -R and open a desk accessory. The lines that
>scroll up from under the da are not updated. At least VersaTerm and
>Microphone fail this test.
>
>_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>|     Juri Munkki jmunkki@hut.fi  jmunkki@fingate.bitnet        I Want   Ne   |
>|     Helsinki University of Technology Computing Centre        My Own   XT   |
>~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~

If they do a ScrollRect(), it returns an updateRgn that includes the
area scrolled out from under the DA.  Just check the rgnBBox of the returned
region to see what lines need to be refreshed.

==================================================================
Alex Kazim, Apple Computer
My ideas alone.
====================================================================