Path: utzoo!attcan!uunet!snorkelwacker!bu.edu!bucrf11.bu.edu!tjh
From: tjh@bucrf11.bu.edu (Tim Hall)
Newsgroups: comp.sys.sgi
Subject: Re: Constraining cursor to a window
Keywords: cursor, window, movement constraints
Message-ID: <60895@bu.edu.bu.edu>
Date: 18 Jul 90 14:07:15 GMT
References: <156@cutmcvax.OZ>
Sender: news@bu.edu.bu.edu
Reply-To: tjh@bucrf11.bu.edu (Tim Hall)
Organization: Boston University
Lines: 22

In article <156@cutmcvax.OZ>, flint@cutmcvax.OZ (Danny Baldoni) writes:
|> 

|>                               What I'd like to know is whether or not
|> there's any way I can restrict the movement of the cursor so that it can
|> NEVER (unless I release it) move outside the boundaries of one of those
|> windows.
|> 

Yes, find the boundaries of your window and then use 'setvaluator' to 
constrain the cursor.  For example if the lower left of your window is
at xmin/ymin and the upper right is at xmax/ymax the following...

	setvaluator( MOUSEX, ( xmax - xmin ) / 2, xmin, xmax );
	setvaluator( MOUSEY, ( ymax - ymin ) / 2, ymin, ymax );

puts the cursor in the center of the window and constrains it within
the window boundaries.  However, if there is another window overlapping 
this window the cursor can enter it.

-Tim Hall
tjh@bu-pub.bu.edu