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From: d88-jwa@dront.nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Forcing a screen update.
Message-ID: <1990Sep4.185928.27159@nada.kth.se>
Date: 4 Sep 90 18:59:28 GMT
References: <7007@milton.u.washington.edu> <1320@radius.com>
Distribution: comp.sys.mac.programmer
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 26

In article <1320@radius.com> lemke@radius.com (Steve Lemke) writes:

>>How does one force a mac to redraw the entire desktop (under Multifinder)?
>>Screen savers and Stuffit Deluxe do this, but I can't figure it out.

>How about this little gem?  I use this to invalidate the screen, and since
>"bigRect" is soooo big, it should basically invalidate the entire desktop.

You could, of course, use the Apple supplied routines to
get the desktop size with better compatibility...

> procedure InvalScreen; { invalides the whole screen }

void
RedrawScreen(void)
{
	PaintBehind((WindowPeek) FrontWindow(), GetGrayRgn());
}

Maybe you should clone the GetGrayRgn region and then dispose
of the clone when you're done with it. I haven't seen that
PaintBehind _should_ change the region passed to it, but who
knows ?

							h+
	Jon W{tte, Stockholm, Sweden, h+@nada.kth.se