Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!uw-beaver!tektronix!tekgen!tekigm2!phils
From: phils@tekigm2.TEK.COM (Philip E Staub)
Newsgroups: comp.sys.amiga
Subject: Re: Mouse Pointer Help Required
Keywords: Help,Mouse Pointer
Message-ID: <2466@tekigm2.TEK.COM>
Date: 2 Feb 88 04:56:37 GMT
References: <168@gould.doc.ic.ac.uk>
Reply-To: phils@tekigm2.UUCP (Philip E Staub)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 52

In article <168@gould.doc.ic.ac.uk> zmacv91@doc.ic.ac.uk (Peter Walkley) writes:
>My friend wants a CLEAN way of getting rid of the mouse pointer, and
>then being able to restore it again.  He's writing a demo that grabs
>the display (i.e Ignores intuition), and wants the MP out of the way.
>
>i.e.
>
>	GetRidOfThePointer() ;
>
>	.....
>	hack() ;
>	morehack() ;
>
>	.....
>
>	PutThe MousePointerBack() ;
>
>can anyone help ?
>
>P. Walkley

I don't know how "clean" you would consider this, but in the include file
"gfxmacros.h" there is a pair of macros OFF_SPRITE and ON_SPRITE which will
achieve what you asked for, (of course, as long as you're not using sprites).

So using your above example:

	OFF_SPRITE;
	...
	hack();
	morehack();
	...
	ON_SPRITE;


I found this when attempting to do the same thing you describe, and I knew I
wouldn't be using sprites in my hacks.

I strongly suspect there is a more "official" way to do this. I can think of 
at least two possibilities: a) a call which moves the mouse pointer off the
visible display area, and b) one which simply disables sprite 0 (I think
that's the one the mouse pointer uses. It's been a long time and my memory
is not too good right now). But in cases which aren't going to use sprites,
this is quick and effective.

Hope this helps.
Phil
-- 
------------------------------------------------------------------------------
Phil Staub                     "I do NOT approve. I merely said I UNDERSTAND."
tektronix!tekigm2!phils                                              - Spock
phils@tekigm2.TEK.COM