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From: sirkm@ssyx.ucsc.edu (Greg Anderson)
Newsgroups: comp.sys.atari.st
Subject: Re: Who have I clobbered? (GEM windows)
Summary: form_dial(FMD_FINISH,x1,y1,w1,h1,x2,y2,w2,h2)
Keywords: GEM redraw rectangle
Message-ID: <6494@saturn.ucsc.edu>
Date: 27 Feb 89 16:17:49 GMT
References: <7829@chinet.chi.il.us>
Sender: usenet@saturn.ucsc.edu
Reply-To: sirkm@ssyx.ucsc.edu (Greg Anderson)
Organization: UC Santa Cruz; Division of Social Sciences
Lines: 22

In article <7829@chinet.chi.il.us> saj@chinet.chi.il.us (Stephen Jacobs) writes:
>Before I try out my 3 best guesses, I thought I'd ask for advice on this one:
>I'd like to have a particular program plaster a big dialog box on the screen.
>After the dialog is over, I'd like to get the screen redrawn properly (natch')

From the Laser C manual:

"Any rectangular area of the screen can be invalidated by calling form_dial
with a value of FMD_FINISH.  The rectangle will be redrawn by a series of
events for all windows covered by it."

>3) Make a buffer. Save the area under the dialog, and restore it at the end
>of the dialog.  How dull; how memory-hungry.

Actually, that's a nice solution.  Memory-hungry is may be, but it is a much
faster solution.
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	Greg Anderson
	Social Sciences Computing
	University of California, Santa Cruz
	email:   sirkm@ssyx.ucsc.edu
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