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From: steele@unc.UUCP (Oliver Steele)
Newsgroups: net.micro.mac
Subject: Re: Window Zooming
Message-ID: <16@unc.unc.UUCP>
Date: Wed, 9-Jul-86 19:33:30 EDT
Article-I.D.: unc.16
Posted: Wed Jul  9 19:33:30 1986
Date-Received: Fri, 11-Jul-86 05:34:15 EDT
References: <12205@amdcad.UUCP>
Reply-To: steele@unc.UUCP (Oliver Steele)
Distribution: net
Organization: CS Dept, U. of N. Carolina, Chapel Hill
Lines: 17

In article <12205@amdcad.UUCP> Thomas Carstensen writes:
>
>	Is anybody familiar with exactly how window zooming is done (Like in 
>the Finder (opening disks & folders, etc), and in such programs as REdit
>& Dialog Creator)?  The problem for me seems to be after drawing a rectangle,
>redrawing the screen window as it used to be.

Set pen mode to patxor and pick your color.  Draw your shape at its smallest
size, then repeat { draw at next size; draw at previous size } until
you've zoomed as much as you want to.  Then draw at the last size to clean
up.  Two xors restore to original bits, so everything is pristine.

-- 
Oliver Steele----------------------------------steele@unc

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