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From: mneerach@iiic.ethz.ch (Matthias Ulrich Neeracher)
Newsgroups: comp.sys.mac.programmer
Subject: Re: GlobalToLocal() LocalToGlobal() information
Keywords: QuickDraw, GlobalToLocal, Window Managare
Message-ID: <25528@neptune.inf.ethz.ch>
Date: 18 Feb 91 09:26:41 GMT
References: <1991Feb17.190448.19116@dartvax.dartmouth.edu>
Sender: news@neptune.inf.ethz.ch
Reply-To: mneerach@iiic.ethz.ch
Distribution: comp
Organization: Departement Informatik, ETH, Zurich
Lines: 21

In article <1991Feb17.190448.19116@dartvax.dartmouth.edu>, watt@eleazar.dartmouth.edu (Gill Watt) writes:
>The (WindowPtr).portRect contains the dimensions of a window
>in the local coordinate system.  To translate a point to the 
>global coordinate system one uses LocalToGlobal( &point ).  
>
>This LocalToGlobal() translation is simply addition or 
>subtraction from some reference point (window location in 
>global coordinates). This information is contained in the
>WDEFResource boundsRect element, but I don't know where 
>it goes during the GetWindow( ) function call.  
>
>Where is this reference point stored? (structure? element?).

The reference point is the topLeft of portBits.bounds, I think.

Matthias

-- 
Matthias Neeracher                                   mneerach@iiic.ethz.ch
   "These days, though, you have to be pretty technical before you can 
    even aspire to crudeness." -- William Gibson, _Johnny Mnemonic_