DocumentListenerButton.java

/**
 * Copyright (C) IntelliBitz Technologies.,  Muthu Ramadoss
 * 168, Medavakkam Main Road, Madipakkam, Chennai 600091, Tamilnadu, India.
 * http://www.intellibitz.com
 * training@intellibitz.com
 * +91 44 2247 5106
 * http://groups.google.com/group/etoe
 * http://sted.sourceforge.net
 *
 * 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.
 *
 * STED, Copyright (C) 2007 IntelliBitz Technologies
 * STED comes with ABSOLUTELY NO WARRANTY;
 * This is free software, and you are welcome
 * to redistribute it under the GNU GPL conditions;
 *
 * Visit http://www.gnu.org/ for GPL License terms.
 */

/**
 * $Id:DocumentListenerButton.java 55 2007-05-19 05:55:34Z sushmu $
 * $HeadURL: svn+ssh://sushmu@svn.code.sf.net/p/sted/code/FontTransliterator/trunk/src/intellibitz/sted/widgets/DocumentListenerButton.java $
 */

package intellibitz.sted.widgets;

import javax.swing.JButton;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

public class DocumentListenerButton
        extends JButton
        implements DocumentListener
{
    public DocumentListenerButton()
    {
    }

    public void insertUpdate(DocumentEvent e)
    {
        toggle(e);
    }

    public void removeUpdate(DocumentEvent e)
    {
        toggle(e);
    }

    public void changedUpdate(DocumentEvent e)
    {
        toggle(e);
    }

    private void toggle(DocumentEvent e)
    {
        if (e.getDocument().getLength() > 0)
        {
            setEnabled(true);
        }
        else
        {
            setEnabled(false);
        }
    }
}