Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!dlyons
From: dlyons@Apple.COM (David Lyons)
Newsgroups: comp.sys.apple
Subject: Re: 2 more IIGS programming questions
Message-ID: <32779@apple.Apple.COM>
Date: 29 Jun 89 06:42:37 GMT
References: <9760@boulder.Colorado.EDU>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 50

In article <9760@boulder.Colorado.EDU> hartkopf@tramp.Colorado.EDU (HARTKOPF JEFFREY M) writes:
>1)
>I've been having a problem getting a new desk accessory which needs to use
>Standard File (SF) to work.  The problem occurs when, since SF is not
>assumed to be loaded, I need to load and start it up.  Here is the TML
>Pascal code I use to do it:
>
>
>    ToolRec.NumTools := 12;                {number of tools needed to load}
>    ToolRec.Tools[1].TSNum := 23;          {Standard File}
>    ToolRec.Tools[1].MinVersion := 0;

It would be really helpful if that "12" was a "1" instead.

>    SFStartUp(MemID, LoWord(ToolsZeroPage^) + $700);

Congratulations!  You've just fed Standard File a direct-page location
$700 bytes *after* the space you allocated for it.  ACK!  Remove the
"+$700" part, and promise to be more careful when you cut and paste
code from another application!

By the way, you must load and use Standard File *when you need it* and
shut it back down again (and Dispose of the handle you allocated) as
soon as you're through (before returning from one of your 4 DA
procedures).  You can screw up the current application if you leave SF
started when the app didn't start it itself.  If the app *did* start it,
just use it and *don't* shut it down, of course.

>In a program I'm writing I need to draw a window (it's a help window) with
>a lot of text in it--maybe 8 typed pages.  Now of course not all of this text
>can be displayed at once in the window, but whenever the window needs to be
>updated (e.g. when it's first drawn, when the user uses the window's scroll bar,
>etc.) it takes a long time to redraw because it seems to have to redraw ALL of
>the text, even though only a small part of it shows.  I'm using DrawString to
>draw the text in the window.  Any suggestions on making it faster, like
>a word processor or text editor does?  Thanks a lot.

You can use GetPortRect to find out which part of the window you're scrolled
to, or you can get the bounding box of the update region.  More details on
request--gotta take off!


 --Dave Lyons, Apple Computer, Inc.          |   DAL Systems
   AppleLink--Apple Edition: DAVE.LYONS      |   P.O. Box 875
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   My opinions are my own, not Apple's.