Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!uw-beaver!cornell!batcomputer!hsgj
From: hsgj@batcomputer.tn.cornell.edu (Dan Green)
Newsgroups: comp.sys.amiga
Subject: Re: Mouse Pointer Help Required
Keywords: Help,Mouse Pointer
Message-ID: <3542@batcomputer.tn.cornell.edu>
Date: 1 Feb 88 01:30:53 GMT
References: <168@gould.doc.ic.ac.uk>
Reply-To: hsgj@tcgould.tn.cornell.edu (Dan Green)
Organization: Cornell Theory Center, Cornell University, Ithaca NY
Lines: 83

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.
>  P. Walkley

Here is a method I clipped out from a program of mine.  It works, and I
sure HOPE its "approved", but I don't know for sure.  Note that this
example replaces the arrow with another image -- for your purposes, just
set this image to all 0's, or don't even bother with the image and in
the for() loop just jam 0's into the array.  But I am getting ahead of
myself...  By the way, make sure "intuition.library" is opened, and that
you include stuff, at least intuition.h, preferences.h (v1.2), and 
types.h.  Since you are not using intuition, make sure that you run
pointer_new BEFORE your hack, and pointer_old AFTER you hack and when
intuition is back in action.  Otherwise, you'll be in hot water...

------ code -----

/* Sprite Image data used when replacing pointer with image */
USHORT	pointer_image[] = {
	0,	0,		/* Don't touch these two words */
	0x7FFF, 0x0000,	/* NEW POINTER IMAGE STARTS HERE */
	0x6083, 0x1FFC,
	0x4081, 0x3FFE,
	0x4E39, 0x3FFE,
	0x4E39, 0x3FFE,
	0x4E39, 0x3FFE,
	0x4E39, 0x3FFE,
	0x4E39, 0x3FFE,
	0x4001, 0x3FFE,
	0x4001, 0x3FFE,
	0x4001, 0x3FFE,
	0x4001, 0x3FFE,
	0x4001, 0x3FFE,
	0x6003, 0x1FFC,
	0x7007, 0x0FF8,
	0x7FFF, 0x0000, /* NEW POINTER IMAGE ENDS HERE */
	0,	0		/* Don't touch these two words */
};

USHORT	OldPointer[POINTERSIZE];	/* Saves old mouse pointer */

/*
 * pointer_new()
 *	Replace pointer with the new image.
 */
void	pointer_new()
{
	struct	Preferences	prefs;
	int	i;

	/* Save mouse pointer and fill pointer with new image */
	GetPrefs(&prefs,sizeof(struct Preferences));
	for (i = 0; i < POINTERSIZE; i++) {
		OldPointer[i] = prefs.PointerMatrix[i];
		prefs.PointerMatrix[i] = pointer_image[i];
	}
	SetPrefs(&prefs,sizeof(struct Preferences),TRUE);
}

/*
 * pointer_old()
 *	Turn pointer from the new image back to its original form
 */
void	pointer_old()
{
	struct	Preferences	prefs;
	int	i;

	/* Restore mouse image */
	GetPrefs(&prefs,sizeof(struct Preferences));
	for (i = 0; i < POINTERSIZE; i++)
		prefs.PointerMatrix[i] = OldPointer[i];
	SetPrefs(&prefs,sizeof(struct Preferences),TRUE);
}

--- end code ---

-- Dan Green
-- 
ARPA:  hsgj@tcgould.tn.cornell.edu
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