Newsgroups: comp.sys.sgi
Path: utzoo!utgpu!jarvis.csri.toronto.edu!dgp.toronto.edu!juancho
From: juancho@dgp.toronto.edu (John Buchanan)
Subject: Mouse location input.
Message-ID: <8904141229.AA24616@explorer.dgp.toronto.edu>
Organization: University of Toronto, CSRI, DGP
	Is there any way to determine the location of a mouse relative to
Date: Fri, 14 Apr 89 08:29:13 EDT

a window rather than in absolute screen coordinates?  The code that I have
now looks like this.

	switch(qread(&val))
		{
		case REDRAW:			/* Reset window offsets */
			getorigin(&xorg,&yorg);
			break;
		case LEFTMOUSE:			/* Get the mouse in window */
			X = getvaluator(MOUSEX) - xorg;
			Y = getvaluator(MOUSEY) - yorg;
			break;
		}

I cannot even imagine the thinking which led to the line drawing occuring
in window coordinates but the mouse tracking only in screen coordinates.

	
John W. Buchanan                  Dynamic Graphics Project
               			  Computer Systems Research Institute
				  University of Toronto
(416) 978-6619			  Toronto, Ontario M5S 1A4

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