;+
; NAME:
;    spheretool_cleanup
;
; PURPOSE:
;    Perform housekeeping tasks when SPHERETOOL exits.
;
; CATEGORY:
;    Holographic video microscopy
;
; CALLING SEQUENCE:
;    Internal routine.  Not intended to be called independently
;    spheretool_cleanup, w
;
; INPUTS:
;    w: identifier of SPHERETOOL's base widget.
;
; SIDE EFFECTS:
;    Frees the pointer used to preserve state information.
;
; MODIFICATION HISTORY:
; 03/20/2009 Written by David G. Grier, New York University
;
; Copyright (c) 2009-2010 David G. Grier.
; 
; LICENSE:
;    This program is free software; you can redistribute it and/or
;    modify it under the terms of the GNU General Public License as
;    published by the Free Software Foundation; either version 2 of the
;    License, or (at your option) any later version.
;
;    This program is distributed in the hope that it will be useful,
;    but WITHOUT ANY WARRANTY; without even the implied warranty of
;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;    General Public License for more details.
;
;    You should have received a copy of the GNU General Public License
;    along with this program; if not, write to the Free Software
;    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
;    02111-1307 USA
;
;    If the Internet and WWW are still functional when you are using
;    this, you shold be able to access the GPL here: 
;    http://www.gnu.org/copyleft/gpl.html
;-

pro spheretool_cleanup, w
compile_opt idl2, hidden

WIDGET_CONTROL, w, GET_UVALUE = s
PTR_FREE, s

end