Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!usc!bloom-beacon!bu-cs!dartvax!eleazar.dartmouth.edu!isle
From: isle@eleazar.dartmouth.edu (Ken Hancock)
Newsgroups: comp.sys.mac.programmer
Subject: Re: TrackButton()
Message-ID: <14170@dartvax.Dartmouth.EDU>
Date: 3 Jul 89 12:17:02 GMT
References: <128@dbase.UUCP> <23239@santra.UUCP> <2509@internal.Apple.COM> <23257@santra.UUCP>
Sender: news@dartvax.Dartmouth.EDU
Reply-To: isle@eleazar.dartmouth.edu (Ken Hancock)
Organization: Personal Computing Center, Dartmouth College
Lines: 40

In article <23257@santra.UUCP> jmunkki@kampi.hut.fi (Juri Munkki) writes:
:>
:>Ok. Here's the code I used in my Mandelbrot DA.
:>
:>/* A general purpose pseudo-button
:>** handler. Give it a rect and it
:>** handles the rectangle as a button
:>** and returns true if the button was
:>** hit.
:>*/
:>int	ClickRect(box)
:>Rect	*box;
:>{
:>register	int	hilited=0,where;
:>		Point	spot;
:>	
:>	while(StillDown())
:>	{	GetMouse(&spot);
:>		where=PtInRect(spot,box);
:>		if(where!=hilited)
:>		{	hilited=where;
:>			InvertRect(box);
:>		}
:>	}
:>	if(hilited) InvertRect(box);
:>
:>	return hilited;
:>}

Technically, you should force an invert first since the mouse may
be up by the time you arrive at your tracking routine...


Ken


Ken Hancock  '90                   | BITNET/UUCP/
Personal Computing Ctr Consultant  |   INTERNET:  isle@eleazar.dartmouth.edu
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