/* $Id: ModeCreateAssociation.java 17865 2010-01-12 20:45:26Z 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) 2006 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.diagram.ui;

 import java.awt.Color;

 import org.argouml.model.Model;

 import org.tigris.gef.base.Layer;

 import org.tigris.gef.graph.MutableGraphModel;

 import org.tigris.gef.presentation.Fig;

 import org.tigris.gef.presentation.FigEdge;

 /**

  * A Mode to interpret user input while drawing a binary association.

  * The association can connect two existing classifiers.

  * 

  * @author Bob Tarling

  */

 public class ModeCreateAssociation extends ModeCreateGraphEdge {

     public Object getMetaType() {

         return Model.getMetaTypes().getAssociation();

     }

     /**

      * Create an edge of the given type and connect it to the

      * given nodes.

      *

      * @param graphModel     the graph model in which to create the connection

      *                       element

      * @param edgeType       the UML object type of the connection

      * @param sourceFigNode      the FigNode for the source element

      * @param destFigNode        the FigNode for the destination element

      * @return The FigEdge representing the newly created model element

      */

     @Override

     protected FigEdge buildConnection(

             final MutableGraphModel graphModel,

             final Object edgeType,

             final Fig sourceFigNode,

             final Fig destFigNode) {

         Object association = graphModel.connect(

                 sourceFigNode.getOwner(), 

                 destFigNode.getOwner(), 

                 edgeType);

         setNewEdge(association);

         // Calling connect() will add the edge to the GraphModel and

         // any LayerPersectives on that GraphModel will get a

         // edgeAdded event and will add an appropriate FigEdge

         // (determined by the GraphEdgeRenderer).

         if (getNewEdge() != null) {

             getSourceFigNode().damage();

             destFigNode.damage();

             final Layer lay = editor.getLayerManager().getActiveLayer();

             final FigEdge fe = (FigEdge) lay.presentationFor(getNewEdge());

             _newItem.setLineColor(Color.black);

             fe.setFig(_newItem);

             fe.computeRoute();

             return fe;

         } else {

             return null;

         }

     }

 }