Path: utzoo!attcan!uunet!husc6!rutgers!apple!lsr
From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Question about clipRect and OpenPicture
Message-ID: <20309@apple.Apple.COM>
Date: 10 Nov 88 00:16:07 GMT
References: <749@cs.rit.edu>
Organization: Advanced Technology Group, Apple Computer
Lines: 20

In article <749@cs.rit.edu> ark@cs.rit.edu (Alan Kaminsky) writes:
>
>I found all this very obscure.  Can someone (a) tell me why one can't use the
>default clipRect, and (b) post or send a code fragment (C or Pascal) that shows
>me everything I am supposed to do when I create a picture and when I draw the
>picture?

The problem is that if you then draw the picture at some place other than
its original position, that default clipRect gets offset as well.
Unfortunately, the coordinates will overflow if the offset is more than 1
pixel (or so).

The solution is to call ClipRect before or after calling OpenPicture.  In
general, you would pass the same rectangle to ClipRect and OpenPicture.  

		 Larry Rosenstein,  Object Specialist
 Apple Computer, Inc.  20525 Mariani Ave, MS 46-B  Cupertino, CA 95014
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