/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui;

import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.SwingUtilities;

import com.rapidminer.InputHandler;


/**
 * An input handler using a JOptionPane.
 * 
 * @author Simon Fischer, Ingo Mierswa
 */
public class GUIInputHandler implements InputHandler {

	public String inputPassword(String messageText) {		 
		final JPasswordField passwordField = new JPasswordField();
		JOptionPane jop = new JOptionPane(new Object[] { messageText, passwordField },
				JOptionPane.QUESTION_MESSAGE,
				JOptionPane.OK_CANCEL_OPTION);
		JDialog dialog = jop.createDialog("Auhtentication required");
		dialog.addComponentListener(new ComponentAdapter(){
			@Override
			public void componentShown(ComponentEvent e){
				SwingUtilities.invokeLater(new Runnable(){
					@Override
					public void run(){
						passwordField.requestFocusInWindow();
						passwordField.requestFocus();
					}
				});
			}
		});
		dialog.setVisible(true);
		int result = (Integer)jop.getValue();
		if(result == JOptionPane.OK_OPTION){
			return new String(passwordField.getPassword());
		} else {
			return null;
		}
	}
}