/* Listener for changes to objects implementing Settable.
Copyright (c) 1998-2005 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
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THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
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ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.kernel.util;
//////////////////////////////////////////////////////////////////////////
//// ValueListener
/**
This is an interface for listeners that are notified when the value
of an object implementing Settable changes.
@author Edward A. Lee
@version $Id$
@since Ptolemy II 1.0
@Pt.ProposedRating Green (eal)
@Pt.AcceptedRating Green (cxh)
@see ptolemy.data.expr.Variable
*/
public interface ValueListener {
///////////////////////////////////////////////////////////////////
//// public methods ////
/** React to the fact that the specified Settable has changed.
* @param settable The object that has changed value.
*/
public void valueChanged(Settable settable);
}