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From: jonah@amos.ucsd.edu (Jonah Stich)
Newsgroups: comp.sys.apple2
Subject: Re: offscreen grafports in Orca/Pascal
Message-ID: <12241@sdcc6.ucsd.edu>
Date: 10 Aug 90 18:04:35 GMT
References: <43826@apple.Apple.COM> <12237@sdcc6.ucsd.edu> <43842@apple.Apple.COM>
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In article <43842@apple.Apple.COM> mattd@Apple.COM (Matt Deatherage) writes:
>In article <12237@sdcc6.ucsd.edu> jonah@amos.ucsd.edu (Jonah Stich) writes:
>>Okay, I've been bitten by this before, so I just thought I'd chip in and warn
>>you before you havev this problem, too. When you open a grafPort this way
>>it sets up a visRgn that is the size of the screen. If you want to do things
>>in this grafPort (I've had problems drawing text) you have to make the
>>following call sequence:
>>
>>NewRgn
>>OpenRgn
>>(FrameRect, whatever...)
>>CloseRgn
>>SetVisHandle
>>
>>Jonah
>
>You'll probably find SetRectRgn to be a whole lot easier.
>
>Matt Deatherage, Apple Computer, Inc. | "The opinions represented here are

You know, I've read through all 3 Toolbox References, cover to cover, and I
still manage to see calls that I've never heard of before! Jeez.... :)
Matt's right though. This would be much better:


NewRgn
SetRectRgn
SetVisHandle


Thanks for catching that, Matt. Not onl do I learn something every day, but
my rhyming abilities improve, too. :)


Jonah
jonah@amos.ucsd.edu