JGraphpadAuthenticator.java :  » Graphic-Library » jgraphpad » com » jgraph » pad » dialog » Java Open Source

/* 
 * $Id: JGraphpadAuthenticator.java,v 1.3 2005/08/07 14:24:57 gaudenz Exp $
 * Copyright (c) 2001-2005, Gaudenz Alder
 * 
 * All rights reserved.
 * 
 * See LICENSE file for license details. If you are unable to locate
 * this file please contact info (at) jgraph (dot) com.
 */
package com.jgraph.pad.dialog;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.Authenticator;
import java.net.PasswordAuthentication;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import com.jgraph.JGraphpad;
import com.jgraph.editor.JGraphEditorResources;

/**
 * Simple authenticator for basic auth.
 */
public class JGraphpadAuthenticator extends Authenticator {

  // This method is called when a password-protected URL is accessed
  protected PasswordAuthentication getPasswordAuthentication() {
    // Get information about the request
    String title = getRequestingPrompt();
    String subtitle = String.valueOf(getRequestingSite());
    AuthDialog auth = new AuthDialog(title, subtitle);
    auth.setSize(320, 240);
    auth.setModal(true);
    JGraphpad.center(auth);
    auth.setVisible(true);

    // Return the information
    return new PasswordAuthentication(auth.getUsername(), auth
        .getPassword());
  }

  /**
   * Implements the authentication dialog for network connections.
   */
  public static class AuthDialog extends JGraphpadDialog {

    /**
     * Holds the username field. Note: createContent is called before the
     * instance initialization so the instance must be constructed there.
     */
    protected JTextField username;

    /**
     * Holds the password field. Note: createContent is called before the
     * instance initialization so the instance must be constructed there.
     */
    protected JPasswordField password;

    /**
     * Constructs a new authentication dialog.
     * 
     * @param title
     *            The title to be displayed.
     * @param subtitle
     *            The subtitle to be displayed.
     */
    public AuthDialog(String title, String subtitle) {
      super(title, subtitle, JGraphEditorResources
          .getImage(JGraphEditorResources
              .getString("authDialog.icon")));

      // Adds OK button to close window
      JButton okButton = new JButton(JGraphEditorResources
          .getString("OK"));
      addButtons(new JButton[] { okButton });
      okButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          dispose();
        }
      });

      // Sets default button for enter key
      getRootPane().setDefaultButton(okButton);

      // Focused the username field when the window
      // becomes visible.
      addWindowListener(new WindowAdapter() {

        /* (non-Javadoc)
         */
        public void windowOpened(WindowEvent e) {
          username.requestFocus();
        }
      });
    }

    /**
     * Overrides {@link JGraphpadDialog#createContent()} to provide the
     * actual content of the dialog.
     * 
     * @return Returns the content of the auth dialog.
     */
    protected JComponent createContent() {
      username = new JTextField(16);
      password = new JPasswordField(16);

      JPanel panel = new JPanel();
      panel.setBorder(BorderFactory.createEmptyBorder(4, 8, 4, 8));
      panel.setLayout(new GridBagLayout());

      GridBagConstraints c = new GridBagConstraints();
      c.anchor = GridBagConstraints.NORTHWEST;
      c.fill = GridBagConstraints.NONE;
      c.ipadx = 2;
      c.ipady = 2;
      c.weighty = 0.0;
      c.weightx = 1.0;
      c.gridwidth = 1;
      c.gridx = 0;
      c.gridy = 0;
      panel.add(new JLabel(JGraphEditorResources.getString("username")
          + ":"), c);

      c.gridx = 1;
      c.gridy = 0;
      panel.add(username, c);

      c.gridx = 0;
      c.gridy = 1;
      panel.add(new JLabel(JGraphEditorResources.getString("password")
          + ":"), c);

      c.gridx = 1;
      c.gridy = 1;
      panel.add(password, c);
      return panel;
    }

    /**
     * Returns the username from the username field.
     */
    public String getUsername() {
      return username.getText();
    }

    /**
     * Returns the password from the password field.
     */
    public char[] getPassword() {
      return password.getPassword();
    }

  }

}