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Java > Open Source Codes > org > lucane > applications > whiteboard > operations > changers > EdgeChanger


1 /*
2  * Lucane - a collaborative platform
3  * Copyright (C) 2004 Vincent Fiack <vfiack@mail15.com>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  */
19 package org.lucane.applications.whiteboard.operations.changers;
20
21 import org.lucane.applications.whiteboard.graph.GraphUtils;
22 import org.lucane.applications.whiteboard.graph.MyGraph;
23
24 import org.jgraph.graph.*;
25
26 public class EdgeChanger extends CellChanger
27 {
28     public void change(MyGraph graph, GraphCell toChange, GraphCell source)
29     {
30         super.change(graph, toChange, source);
31         
32         DefaultEdge to = (DefaultEdge)toChange;
33         DefaultEdge from = (DefaultEdge)source;
34         
35         DefaultPort sourcePort = (DefaultPort)from.getSource();
36         DefaultPort targetPort = (DefaultPort)from.getTarget();
37                 
38         if(sourcePort == null)
39             to.setSource(null);
40         else
41         {
42             DefaultGraphCell parent = GraphUtils.findCorrespondingCell(graph, (DefaultGraphCell)sourcePort.getParent());
43             sourcePort.setParent(parent);
44             to.setSource(sourcePort);
45         }
46                 
47         if(targetPort == null)
48             to.setTarget(null);
49         else
50         {
51             DefaultGraphCell parent = GraphUtils.findCorrespondingCell(graph, (DefaultGraphCell)targetPort.getParent());
52             targetPort.setParent(parent);
53             to.setTarget(targetPort);
54         }
55     }
56 }
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