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# ----------------------------------------------------------------------

#  PURPOSE:  Base class for all electrical appliances that interact

#            with Outlets.

#

#   AUTHOR:  Michael J. McLennan       Phone: (610)712-2842

#            AT&T Bell Laboratories   E-mail: michael.mclennan@att.com

#

#      RCS:  $Id: Appliance.tcl,v 1.1.1.1 2002-01-16 10:24:47 markom Exp $

# ----------------------------------------------------------------------

#               Copyright (c) 1993  AT&T Bell Laboratories

# ======================================================================

# Permission to use, copy, modify, and distribute this software and its

# documentation for any purpose and without fee is hereby granted,

# provided that the above copyright notice appear in all copies and that

# both that the copyright notice and warranty disclaimer appear in

# supporting documentation, and that the names of AT&T Bell Laboratories

# any of their entities not be used in advertising or publicity

# pertaining to distribution of the software without specific, written

# prior permission.

#

# AT&T disclaims all warranties with regard to this software, including

# all implied warranties of merchantability and fitness.  In no event

# shall AT&T be liable for any special, indirect or consequential

# damages or any damages whatsoever resulting from loss of use, data or

# profits, whether in an action of contract, negligence or other

# tortuous action, arising out of or in connection with the use or

# performance of this software.

# ======================================================================

itcl_class Appliance {

        method power {power} {

                if {[itcl_info objects [info which $outlet]] == ""} {

                        set outlet {}

                }

                if {$outlet == ""} {

                        error "cannot use $this: not plugged in"

                }

                $outlet use $power

        }

        public outlet {}

}