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1   /*
2    *  XNap - A P2P framework and client.
3    *
4    *  See the file AUTHORS for copyright information.
5    *
6    *  This program is free software; you can redistribute it and/or modify
7    *  it under the terms of the GNU General Public License as published by
8    *  the Free Software Foundation.
9    *
10   *  This program 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
13   *  GNU General Public License for more details.
14   *
15   *  You should have received a copy of the GNU General Public License
16   *  along with this program; if not, write to the Free Software
17   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   */
19  
20  package org.xnap.gui.event;
21  
22  import java.awt.Dialog;
23  import java.util.List;
24  import java.util.Vector;
25  
26  /***
27   * This is a utility class that can be used by dialogs to notify
28   * <code>DialogEvent</code> listeners.
29   */
30  public class DialogSupport { 
31  
32      //--- Data field(s) ---
33  
34      private List listeners = new Vector();
35  
36      //--- Constructor(s) ---
37      
38      /***
39       * Constructs a DialogSupport object.
40       */
41      public DialogSupport()
42      {
43      }
44  
45      //--- Method(s) ---
46  
47      public void addDialogListener(DialogListener listener) 
48      {
49          listeners.add(listener);
50      }
51  
52      public void removeDialogListener(DialogListener listener) 
53      {
54          listeners.remove(listener);
55      }
56  
57  	public int size()
58  	{
59  		return listeners.size();
60  	}
61  
62      public void fireDialogWillBecomeVisible(Dialog dialog)
63      {
64          Object[] l = listeners.toArray();
65  
66  		if (l != null) {
67  			for (int i = l.length - 1; i >= 0; i--) {
68  				((DialogListener)l[i]).dialogWillBecomeVisible(dialog);
69  			}
70  		}
71      }
72  
73      public void fireDialogWillBecomeInvisible(Dialog dialog)
74      {
75          Object[] l = listeners.toArray();
76  
77  		if (l != null) {
78  			for (int i = l.length - 1; i >= 0; i--) {
79  				((DialogListener)l[i]).dialogWillBecomeInvisible(dialog);
80  			}
81  		}
82      }
83  
84  }