/* $Id: ActionAddAttribute.java 17897 2010-01-12 21:36:40Z 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:

  *    bobtarling

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

  *

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

  */

 // Copyright (c) 1996-2007 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.foundation.core;

 import java.awt.event.ActionEvent;

 import javax.swing.Action;

 import org.argouml.application.helpers.ResourceLoaderWrapper;

 import org.argouml.i18n.Translator;

 import org.argouml.kernel.Project;

 import org.argouml.kernel.ProjectManager;

 import org.argouml.kernel.UmlModelMutator;

 import org.argouml.model.Model;

 import org.argouml.ui.targetmanager.TargetEvent;

 import org.argouml.ui.targetmanager.TargetListener;

 import org.argouml.ui.targetmanager.TargetManager;

 import org.argouml.ui.UndoableAction;

 /**

  * Action to add an attribute to a Classifier or AssociationEnd.<p>

  * 

  * This class shall be the only one that knows 

  * when this tool should be downlighted or not.

  */

 @UmlModelMutator

 public class ActionAddAttribute extends UndoableAction {

     private static ActionAddAttribute targetFollower;

     /**

      * The constructor for this class.

      */

     public ActionAddAttribute() {

         super(Translator.localize("button.new-attribute"),

                 ResourceLoaderWrapper.lookupIcon("button.new-attribute"));

         // Set the tooltip string:

         putValue(Action.SHORT_DESCRIPTION, 

                 Translator.localize("button.new-attribute"));

     }

     public static ActionAddAttribute getTargetFollower() {

         if (targetFollower == null) {

             targetFollower  = new ActionAddAttribute();

             TargetManager.getInstance().addTargetListener(new TargetListener() {

                 public void targetAdded(TargetEvent e) {

                     setTarget();

                 }

                 public void targetRemoved(TargetEvent e) {

                     setTarget();

                 }

                 public void targetSet(TargetEvent e) {

                     setTarget();

                 }

                 private void setTarget() {

                     targetFollower.setEnabled(targetFollower.shouldBeEnabled());

                 }

             });

             targetFollower.setEnabled(targetFollower.shouldBeEnabled());

         }

         return targetFollower;

     }

     /*

      * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)

      */

     public void actionPerformed(ActionEvent ae) {

         super.actionPerformed(ae);

         Object target = TargetManager.getInstance().getSingleModelTarget();

         Object classifier = null;

         if (Model.getFacade().isAClassifier(target)

                 || Model.getFacade().isAAssociationEnd(target)) {

             classifier = target;

         } else if (Model.getFacade().isAFeature(target)) {

             classifier = Model.getFacade().getOwner(target);

         } else {

             return;

         }

         Project project = ProjectManager.getManager().getCurrentProject();

         Object attrType = project.getDefaultAttributeType();

         Object attr =

             Model.getCoreFactory().buildAttribute2(

                 classifier,

                 attrType);

         TargetManager.getInstance().setTarget(attr);

     }

     /**

      * @return true if this tool should be enabled

      */

     public boolean shouldBeEnabled() {

         Object target = TargetManager.getInstance().getSingleModelTarget();

         if (target == null) {

             return false;

         }

         return Model.getFacade().isAClassifier(target)

             || Model.getFacade().isAFeature(target)

             || Model.getFacade().isAAssociationEnd(target);

     }

     /**

      * The UID.

      */

     private static final long serialVersionUID = -111785878370086329L;

 } /* end class ActionAddAttribute */