/* $Id: UMLExpressionBodyField.java 17881 2010-01-12 21:09:28Z linus $

  *****************************************************************************

  * Copyright (c) 2009 Contributors - see below

  * All rights reserved. This program and the accompanying materials

  * are made available under the terms of the Eclipse Public License v1.0

  * which accompanies this distribution, and is available at

  * http://www.eclipse.org/legal/epl-v10.html

  *

  * Contributors:

  *    mvw

  *****************************************************************************

  *

  * Some portions of this file was previously release using the BSD License:

  */

 // Copyright (c) 1996-2009 The Regents of the University of California. All

 // Rights Reserved. Permission to use, copy, modify, and distribute this

 // software and its documentation without fee, and without a written

 // agreement is hereby granted, provided that the above copyright notice

 // and this paragraph appear in all copies.  This software program and

 // documentation are copyrighted by The Regents of the University of

 // California. The software program and documentation are supplied "AS

 // IS", without any accompanying services from The Regents. The Regents

 // does not warrant that the operation of the program will be

 // uninterrupted or error-free. The end-user understands that the program

 // was developed for research purposes and is advised not to rely

 // exclusively on the program for any reason.  IN NO EVENT SHALL THE

 // UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,

 // SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,

 // ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF

 // THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF

 // SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY

 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE

 // PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF

 // CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,

 // UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

 package org.argouml.uml.ui;

 import java.beans.PropertyChangeEvent;

 import java.beans.PropertyChangeListener;

 import javax.swing.JTextArea;

 import javax.swing.event.DocumentEvent;

 import javax.swing.event.DocumentListener;

 import org.apache.log4j.Logger;

 import org.argouml.i18n.Translator;

 import org.argouml.ui.LookAndFeelMgr;

 import org.argouml.ui.targetmanager.TargetListener;

 import org.argouml.ui.targetmanager.TargettableModelView;

 /**

  * This text field shows the body of a UML expression.

  */

 public class UMLExpressionBodyField extends JTextArea

     implements DocumentListener, UMLUserInterfaceComponent, 

     PropertyChangeListener, TargettableModelView {

     /**

      * Logger.

      */

     private static final Logger LOG =

         Logger.getLogger(UMLExpressionBodyField.class);

     private UMLExpressionModel2 model;

     private boolean notifyModel;

     /**

      * The constructor.

      * 

      * @param expressionModel

      *            Expression model, should be shared between Language and Body

      *            fields

      * @param notify

      *            Set to true to forward events to model. Only one of Language

      *            and Body fields should have this set to true.

      */

     public UMLExpressionBodyField(UMLExpressionModel2 expressionModel,

                                   boolean notify) {

         model = expressionModel;

         notifyModel = notify;

         getDocument().addDocumentListener(this);

         setToolTipText(Translator.localize("label.body.tooltip"));

         setFont(LookAndFeelMgr.getInstance().getStandardFont());

         setRows(2); // make it stretch vertically

     }

     /*

      * @see org.argouml.uml.ui.UMLUserInterfaceComponent#targetChanged()

      */

     public void targetChanged() {

         LOG.debug("UMLExpressionBodyField: targetChanged");

         if (notifyModel) {

             model.targetChanged();

         }

         update();

     }

     /*

      * @see org.argouml.uml.ui.UMLUserInterfaceComponent#targetReasserted()

      */

     public void targetReasserted() {

     }

     /* TODO: This does not work - no event arrives. */

     public void propertyChange(PropertyChangeEvent event) {

         LOG.debug("UMLExpressionBodyField: propertySet" + event);

         update();

     }

     private void update() {

         String oldText = getText();

         String newText = model.getBody();

         if (oldText == null || newText == null || !oldText.equals(newText)) {

             if (oldText != newText) {

                 setText(newText);

             }

         }

     }

     /*

      * @see javax.swing.event.DocumentListener#changedUpdate(javax.swing.event.DocumentEvent)

      */

     public void changedUpdate(final DocumentEvent p1) {

         model.setBody(getText());

     }

     /*

      * @see javax.swing.event.DocumentListener#removeUpdate(javax.swing.event.DocumentEvent)

      */

     public void removeUpdate(final DocumentEvent p1) {

         model.setBody(getText());

     }

     /*

      * @see javax.swing.event.DocumentListener#insertUpdate(javax.swing.event.DocumentEvent)

      */

     public void insertUpdate(final DocumentEvent p1) {

         model.setBody(getText());

     }

     public TargetListener getTargettableModel() {

         return model;

     }

 }