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1   /*
2   * The contents of this file are subject to the BT "ZEUS" Open Source 
3   * Licence (L77741), Version 1.0 (the "Licence"); you may not use this file 
4   * except in compliance with the Licence. You may obtain a copy of the Licence
5   * from $ZEUS_INSTALL/licence.html or alternatively from
6   * http://www.labs.bt.com/projects/agents/zeus/licence.htm
7   * 
8   * Except as stated in Clause 7 of the Licence, software distributed under the
9   * Licence is distributed WITHOUT WARRANTY OF ANY KIND, either express or 
10  * implied. See the Licence for the specific language governing rights and 
11  * limitations under the Licence.
12  * 
13  * The Original Code is within the package zeus.*.
14  * The Initial Developer of the Original Code is British Telecommunications
15  * public limited company, whose registered office is at 81 Newgate Street, 
16  * London, EC1A 7AJ, England. Portions created by British Telecommunications 
17  * public limited company are Copyright 1996-9. All Rights Reserved.
18  * 
19  * THIS NOTICE MUST BE INCLUDED ON ANY COPY OF THIS FILE
20  */
21  
22  
23  
24  package zeus.gui.graph;
25  
26  import java.awt.*;
27  import java.awt.event.*;
28  import javax.swing.*;
29  import javax.swing.event.*;
30  
31  public abstract class AbstractGraphNodeEditor implements GraphNodeEditor {
32     protected static final int EDITING_STOPPED = 0;
33     protected static final int EDITING_CANCELLED = 1;
34  
35     protected EventListenerList editListeners = new EventListenerList();
36  
37     protected Graph     graph = null;
38     protected GraphNode node = null;
39     
40     public void addGraphNodeEditorListener(GraphNodeEditorListener x) {
41        editListeners.add(GraphNodeEditorListener.class, x);
42     }
43     public void removeGraphNodeEditorListener(GraphNodeEditorListener x) {
44        editListeners.remove(GraphNodeEditorListener.class, x);
45     }
46  
47     protected void fireEditAction(int type, GraphNode node, Object value) {
48        GraphNodeEditorEvent evt = new GraphNodeEditorEvent(this,node,value);
49        Object[] listeners = editListeners.getListenerList();
50        for(int i = listeners.length-2; i >= 0; i -= 2) {
51           if (listeners[i] == GraphNodeEditorListener.class) {
52              GraphNodeEditorListener cl = (GraphNodeEditorListener)listeners[i+1];
53              switch(type) {
54  	       case EDITING_STOPPED:
55                      cl.graphNodeEditingStopped(evt);
56                      break;
57                 case EDITING_CANCELLED:
58                      cl.graphNodeEditingCancelled(evt);
59                      break;
60              }
61           }
62        }
63     }
64  }