/* $Id: ClassdiagramNoteEdge.java 17863 2010-01-12 20:07:22Z 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) 1996-2006 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.static_structure.layout;

 import java.awt.Point;

 import org.tigris.gef.presentation.Fig;

 import org.tigris.gef.presentation.FigEdge;

 import org.tigris.gef.presentation.FigPoly;

 /**

  * This class represents note edges to enable an appropriate positioning

  * of notes.

  *

  * @author  David Gunkel

  */

 public class ClassdiagramNoteEdge

     extends ClassdiagramEdge {

     /**

      * The constructor.

      *

      * @param edge the fig edge

      */

     public ClassdiagramNoteEdge(FigEdge edge) {

         super(edge);

     }

     /**

      * NoteEdges are drawn directly between the linked nodes, using vertically

      * centered points on the right- resp. left-hand side of the nodes.

      * @see org.argouml.uml.diagram.static_structure.layout.ClassdiagramEdge#layout()

      */

     public void layout() {

         // use left and right, up and down

         Fig fs = getSourceFigNode();

         Fig fd = getDestFigNode();

         if (fs.getLocation().x < fd.getLocation().x) {

             addPoints(fs, fd);

         } else {

             addPoints(fd, fs);

         }

         FigPoly fig = getUnderlyingFig();

         fig.setFilled(false);

         getCurrentEdge().setFig(fig);

     }

     /**

      * Add points to the underlying FigPoly.

      *

      * @param fs - source Fig of this edge

      * @param fd - destination Fig of this edge

      */

     private void addPoints(Fig fs, Fig fd) {

         FigPoly fig = getUnderlyingFig();

         Point p = fs.getLocation();

         p.translate(fs.getWidth(), fs.getHeight() / 2);

         fig.addPoint(p);

         p = fd.getLocation();

         p.translate(0, fd.getHeight() / 2);

         fig.addPoint(p);

     }

 }