/*
** Luxor - XML User Interface Language (XUL) Toolkit
** Copyright (c) 2001, 2002 by Gerald Bauer
**
** This program is free software.
**
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE.
**
*/

package luxor.swing.widget;

import java.awt.event.*;
import javax.swing.*;

/**
 *  This code is adapted from http://www.algonet.se/~set_lo/java/sbe/files/uts2/Chapter9html/Chapter9.htm
 */

class HistoryComboBoxAgent extends KeyAdapter
{
   private JComboBox _comboBox;
   private JTextField _editor;

   public HistoryComboBoxAgent( JComboBox comboBox )
   {
      _comboBox = comboBox;
      _editor = ( JTextField ) comboBox.getEditor().getEditorComponent();
      _editor.addKeyListener( this );
   }


   public void keyReleased( KeyEvent e )
   {
      char ch = e.getKeyChar();
      if( ch == KeyEvent.CHAR_UNDEFINED || Character.isISOControl( ch ) )
         return;

      int pos = _editor.getCaretPosition();
      String str = _editor.getText();
      if( str.length() == 0 )
         return;

      for( int k = 0; k < _comboBox.getItemCount(); k++ )
      {
         String item = _comboBox.getItemAt( k ).toString();
         if( item.startsWith( str ) )
         {
            _editor.setText( item );
            _editor.setCaretPosition( item.length() );
            _editor.moveCaretPosition( pos );
            break;
         }
      }
   }
}