nicklistmodel.java

google公司的用Java写的一个聊天软件的原代码

/***************************************************************************
 *   Copyright 2006-2008 by Christian Ihle                                 *
 *   [e-mail]                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

package net.usikkert.kouchat.ui.swing;

import javax.swing.AbstractListModel;
import javax.swing.SwingUtilities;

import net.usikkert.kouchat.event.NickListListener;
import net.usikkert.kouchat.misc.NickDTO;
import net.usikkert.kouchat.misc.NickList;

/**
 * This is the list model for the user list. It's just a facade above
 * the real list containing the users, so it can deliver events on changes.
 *
 * @author Christian Ihle
 */
public class NickListModel extends AbstractListModel implements NickListListener
{
	private static final long serialVersionUID = 1L;

	private final NickList nickList;

	/**
	 * Constructor. Adds this list model as a listener for events
	 * from the real user list.
	 *
	 * @param nickList The list where the real users are.
	 */
	public NickListModel( final NickList nickList )
	{
		this.nickList = nickList;
		nickList.addNickListListener( this );
	}

	/**
	 * Returns the user at the specified index position.
	 */
	@Override
	public NickDTO getElementAt( final int index )
	{
		return nickList.get( index );
	}

	/**
	 * Returns the number of users in the user list.
	 */
	@Override
	public int getSize()
	{
		return nickList.size();
	}

	/**
	 * Sends a fireIntervalAdded() event.
	 */
	@Override
	public void nickAdded( final int pos )
	{
		SwingUtilities.invokeLater( new Runnable()
		{
			@Override
			public void run()
			{
				fireIntervalAdded( this, pos, pos );
			}
		} );
	}

	/**
	 * Sends a fireContentsChanged() event.
	 */
	@Override
	public void nickChanged( final int pos )
	{
		SwingUtilities.invokeLater( new Runnable()
		{
			@Override
			public void run()
			{
				fireContentsChanged( this, pos, pos );
			}
		} );
	}

	/**
	 * Sends a fireIntervalRemoved() event.
	 */
	@Override
	public void nickRemoved( final int pos )
	{
		SwingUtilities.invokeLater( new Runnable()
		{
			@Override
			public void run()
			{
				fireIntervalRemoved( this, pos, pos );
			}
		} );
	}
}