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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.Iterator;
24  import java.util.LinkedList;
25  import java.util.List;
26  
27  import javax.swing.JPanel;
28  
29  import org.xnap.gui.AbstractPreferencesDialog;
30  import org.xnap.gui.PluginPreferencesDialog;
31  import org.xnap.gui.SettingsPanel;
32  
33  /***
34   */
35  public abstract class AbstractPreferencesDialogListener 
36      implements DialogListener { 
37  
38      //--- Data Field(s) ---
39  
40      private LinkedList panels = new LinkedList();
41  
42      //--- Method(s) ---
43  
44      /***
45       * Sub classes should add their panels to the preferences dialog
46       * and to <code>panels</code>.
47       */
48      public abstract void addPanels(AbstractPreferencesDialog dialog, 
49  								   List panels);
50  
51  	public void dialogWillBecomeVisible(Dialog dialog)
52  	{
53  		addPanels((AbstractPreferencesDialog)dialog, panels);
54  	}
55  
56      public void dialogWillBecomeInvisible(Dialog dialog)
57      {
58  		panels.clear();
59      }
60  	
61      public void dispose()
62      {
63  		for (Iterator i = panels.iterator(); i.hasNext();) {
64  			Object o = i.next();
65  			if (o instanceof SettingsPanel) {
66  				PluginPreferencesDialog.removePanel((SettingsPanel)o);
67  			}
68  			else if (o instanceof JPanel) {
69  				PluginPreferencesDialog.removePanel((JPanel)o);
70  			}
71  		}
72  		panels.clear();
73      }
74  
75  }