Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!amdahl!twg.com!lefty
From: lefty@twg.com (David N. Schlesinger)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Help figuring screen size in a DA!
Message-ID: <168@gollum.twg.com>
Date: 20 Feb 90 17:57:07 GMT
References: <1990Feb15.164818.24121@ncsuvx.ncsu.edu>
Sender: news@twg.com
Distribution: usa
Organization: The Wollongong Group
Lines: 29

In article <1990Feb15.164818.24121@ncsuvx.ncsu.edu> jbritt@shumv1.ncsu.edu 
(Joe Britt) writes:
> I am writing my first DA and need to figure out the size of the screen.
> I realize that DA's don't have an A5 World, and so also don't have a set
> of QD globals with goodies like screenBits.  What I'm looking for is
> help on a good way to go about figuring out the screen size.

What I'd do is use the GrafPort pointed to by the low-memory global 
WMgrPort (at location 0x9DE).  Something like the following:

#define   WMgrPort    (*((GrafPort *) 0x9DE))

wmPort = WMgrPort;
BlockMove(wmPort->portRect, myBounds, sizeof(Rect));

This probably won't work on multiple-screen systems, but it's worked for 
me in the past.  Specifically, I've used it for centering dialog windows 
from Control Panel devices...

Hope this helps...

Lefty

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