001/* Base class for displaying exceptions, warnings, and messages.
002
003 Copyright (c) 1999-2014 The Regents of the University of California.
004 All rights reserved.
005 Permission is hereby granted, without written agreement and without
006 license or royalty fees, to use, copy, modify, and distribute this
007 software and its documentation for any purpose, provided that the above
008 copyright notice and the following two paragraphs appear in all copies
009 of this software.
010
011 IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
012 FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
013 ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
014 THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
015 SUCH DAMAGE.
016
017 THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
018 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
019 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
020 PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
021 CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
022 ENHANCEMENTS, OR MODIFICATIONS.
023
024 PT_COPYRIGHT_VERSION_2
025 COPYRIGHTENDKEY
026 */
027package ptolemy.gui;
028
029// ptolemy.gui.CancelException is deprecated, use ptolemy.util.CancelException.
030
031///////////////////////////////////////////////////////////////////
032//// MessageHandler
033
034/**
035 This is a class that is used to report errors.  It provides a
036 set of static methods that are called to report errors.  However, the
037 actual reporting of the errors is deferred to an instance of this class
038 that is set using the setMessageHandler() method.  Normally there
039 is only one instance, set up by the application, so the class is
040 a singleton.  But this is not enforced.
041 <p>
042 This base class simply writes the errors to System.err.
043 When an applet or application starts up, it may wish to set a subclass
044 of this class as the message handler, to allow a nicer way of
045 reporting errors.  For example, a swing application will probably
046 want to report errors in a dialog box, using for example
047 the derived class GraphicalMessageHandler.
048 @see GraphicalMessageHandler
049
050 @author  Edward A. Lee, Steve Neuendorffer
051 @version $Id$
052 @since Ptolemy II 1.0
053 @Pt.ProposedRating Yellow (eal)
054 @Pt.AcceptedRating Yellow (janneck)
055 @deprecated Use ptolemy.util.MessageHandler.
056 */
057@Deprecated
058public class MessageHandler extends ptolemy.util.MessageHandler {
059    // The class body is empty so that callers use the static
060    // methods in the superclass.
061    // This class had duplicate code, which was confusing.
062}