AuthPanel.java

package org.jopenray.rfb;

//
//  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
//  Copyright (C) 2002-2006 Constantin Kaplinsky.  All Rights Reserved.
//
//  This 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 software 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 software; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
//  USA.
//

import java.awt.Button;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//
// The panel which implements the user authentication scheme
//

class AuthPanel extends Panel implements ActionListener {

	TextField passwordField;
	Button okButton;

	//
	// Constructor.
	//

	public AuthPanel(VncViewer viewer) {
		Label titleLabel = new Label("VNC Authentication", Label.CENTER);
		titleLabel.setFont(new Font("Helvetica", Font.BOLD, 18));

		Label promptLabel = new Label("Password:", Label.CENTER);

		passwordField = new TextField(10);
		passwordField.setForeground(Color.black);
		passwordField.setBackground(Color.white);
		passwordField.setEchoChar('*');

		okButton = new Button("OK");

		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints gbc = new GridBagConstraints();

		setLayout(gridbag);

		gbc.gridwidth = GridBagConstraints.REMAINDER;
		gbc.insets = new Insets(0, 0, 20, 0);
		gridbag.setConstraints(titleLabel, gbc);
		add(titleLabel);

		gbc.fill = GridBagConstraints.NONE;
		gbc.gridwidth = 1;
		gbc.insets = new Insets(0, 0, 0, 0);
		gridbag.setConstraints(promptLabel, gbc);
		add(promptLabel);

		gridbag.setConstraints(passwordField, gbc);
		add(passwordField);
		passwordField.addActionListener(this);

		// gbc.ipady = 10;
		gbc.gridwidth = GridBagConstraints.REMAINDER;
		gbc.fill = GridBagConstraints.BOTH;
		gbc.insets = new Insets(0, 20, 0, 0);
		gbc.ipadx = 30;
		gridbag.setConstraints(okButton, gbc);
		add(okButton);
		okButton.addActionListener(this);
	}

	//
	// Move keyboard focus to the default object, that is, the password
	// text field.
	//

	public void moveFocusToDefaultField() {
		passwordField.requestFocus();
	}

	//
	// This method is called when a button is pressed or return is
	// pressed in the password text field.
	//

	public synchronized void actionPerformed(ActionEvent evt) {
		if (evt.getSource() == passwordField || evt.getSource() == okButton) {
			passwordField.setEnabled(false);
			notify();
		}
	}

	//
	// Wait for user entering a password, and return it as String.
	//

	public synchronized String getPassword() throws Exception {
		try {
			wait();
		} catch (InterruptedException e) {
		}
		return passwordField.getText();
	}

}