Password Dialog
/*
* Copyright (C) 2001-2007 Stephen Ostermiller
* http://ostermiller.org/contact.pl?regarding=Java+Utilities
*
* 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.
*
* See COPYING.TXT for details.
*/
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
/**
* A modal dialog that asks the user for a user name and password.
* More information about this class is available from <a target="_top" href=
* "http://ostermiller.org/utils/PasswordDialog.html">ostermiller.org</a>.
*
* <code>
* <pre>
* PasswordDialog p = new PasswordDialog(null, "Test");
* if(p.showDialog()){
* System.out.println("Name: " + p.getName());
* System.out.println("Pass: " + p.getPass());
* } else {
* System.out.println("User selected cancel");
* }
* </pre>
* </code>
*
* @author Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
* @since ostermillerutils 1.00.00
*/
public class PasswordDialog extends JDialog {
/**
* Serial version id
*/
private static final long serialVersionUID = -832548326686122133L;
/**
* Locale specific strings displayed to the user.
*
* @since ostermillerutils 1.00.00
*/
protected ResourceBundle labels;
/**
* Set the locale used for getting localized
* strings.
*
* @param locale Locale used to for i18n.
*
* @since ostermillerutils 1.00.00
*/
@Override public void setLocale(Locale locale){
labels = ResourceBundle.getBundle("com.Ostermiller.util.PasswordDialog", locale);
}
/**
* Where the name is typed.
*
* @since ostermillerutils 1.00.00
*/
protected JTextField name;
/**
* Where the password is typed.
*
* @since ostermillerutils 1.00.00
*/
protected JPasswordField pass;
/**
* The OK button.
*
* @since ostermillerutils 1.00.00
*/
protected JButton okButton;
/**
* The cancel button.
*
* @since ostermillerutils 1.00.00
*/
protected JButton cancelButton;
/**
* The label for the field in which the name is typed.
*
* @since ostermillerutils 1.00.00
*/
protected JLabel nameLabel;
/**
* The label for the field in which the password is typed.
*
* @since ostermillerutils 1.00.00
*/
protected JLabel passLabel;
/**
* Set the name that appears as the default
* An empty string will be used if this in not specified
* before the dialog is displayed.
*
* @param name default name to be displayed.
*
* @since ostermillerutils 1.00.00
*/
@Override public void setName(String name){
this.name.setText(name);
}
/**
* Set the password that appears as the default
* An empty string will be used if this in not specified
* before the dialog is displayed.
*
* @param pass default password to be displayed.
*
* @since ostermillerutils 1.00.00
*/
public void setPass(String pass){
this.pass.setText(pass);
}
/**
* Set the label on the OK button.
* The default is a localized string.
*
* @param ok label for the ok button.
*
* @since ostermillerutils 1.00.00
*/
public void setOKText(String ok){
this.okButton.setText(ok);
pack();
}
/**
* Set the label on the cancel button.
* The default is a localized string.
*
* @param cancel label for the cancel button.
*
* @since ostermillerutils 1.00.00
*/
public void setCancelText(String cancel){
this.cancelButton.setText(cancel);
pack();
}
/**
* Set the label for the field in which the name is entered.
* The default is a localized string.
*
* @param name label for the name field.
*
* @since ostermillerutils 1.00.00
*/
public void setNameLabel(String name){
this.nameLabel.setText(name);
pack();
}
/**
* Set the label for the field in which the password is entered.
* The default is a localized string.
*
* @param pass label for the password field.
*
* @since ostermillerutils 1.00.00
*/
public void setPassLabel(String pass){
this.passLabel.setText(pass);
pack();
}
/**
* Get the name that was entered into the dialog before
* the dialog was closed.
*
* @return the name from the name field.
*
* @since ostermillerutils 1.00.00
*/
@Override public String getName(){
return name.getText();
}
/**
* Get the password that was entered into the dialog before
* the dialog was closed.
*
* @return the password from the password field.
*
* @since ostermillerutils 1.00.00
*/
public String getPass(){
return new String(pass.getPassword());
}
/**
* Finds out if user used the OK button or an equivalent action
* to close the dialog.
* Pressing enter in the password field may be the same as
* 'OK' but closing the dialog and pressing the cancel button
* are not.
*
* @return true if the the user hit OK, false if the user canceled.
*
* @since ostermillerutils 1.00.00
*/
public boolean okPressed(){
return pressed_OK;
}
/**
* update this variable when the user makes an action
*
* @since ostermillerutils 1.00.00
*/
private boolean pressed_OK = false;
/**
* Create this dialog with the given parent and title.
*
* @param parent window from which this dialog is launched
* @param title the title for the dialog box window
*
* @since ostermillerutils 1.00.00
*/
public PasswordDialog(Frame parent, String title) {
super(parent, title, true);
setLocale(Locale.getDefault());
if (title==null){
setTitle(labels.getString("dialog.title"));
}
if (parent != null){
setLocationRelativeTo(parent);
}
// super calls dialogInit, so we don't need to do it again.
}
/**
* Create this dialog with the given parent and the default title.
*
* @param parent window from which this dialog is launched
*
* @since ostermillerutils 1.00.00
*/
public PasswordDialog(Frame parent) {
this(parent, null);
}
/**
* Create this dialog with the default title.
*
* @since ostermillerutils 1.00.00
*/
public PasswordDialog() {
this(null, null);
}
/**
* Called by constructors to initialize the dialog.
*
* @since ostermillerutils 1.00.00
*/
@Override protected void dialogInit(){
if (labels == null){
setLocale(Locale.getDefault());
}
name = new JTextField("", 20);
pass = new JPasswordField("", 20);
okButton = new JButton(labels.getString("dialog.ok"));
cancelButton = new JButton(labels.getString("dialog.cancel"));
nameLabel = new JLabel(labels.getString("dialog.name") + " ");
passLabel = new JLabel(labels.getString("dialog.pass") + " ");
super.dialogInit();
KeyListener keyListener = (new KeyAdapter() {
@Override public void keyPressed(KeyEvent e){
if (e.getKeyCode() == KeyEvent.VK_ESCAPE ||
(e.getSource() == cancelButton
&& e.getKeyCode() == KeyEvent.VK_ENTER)){
pressed_OK = false;
PasswordDialog.this.setVisible(false);
}
if (e.getSource() == okButton &&
e.getKeyCode() == KeyEvent.VK_ENTER){
pressed_OK = true;
PasswordDialog.this.setVisible(false);
}
}
});
addKeyListener(keyListener);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e){
Object source = e.getSource();
if (source == name){
// the user pressed enter in the name field.
name.transferFocus();
} else {
// other actions close the dialog.
pressed_OK = (source == pass || source == okButton);
PasswordDialog.this.setVisible(false);
}
}
};
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
c.insets.top = 5;
c.insets.bottom = 5;
JPanel pane = new JPanel(gridbag);
pane.setBorder(BorderFactory.createEmptyBorder(10, 20, 5, 20));
c.anchor = GridBagConstraints.EAST;
gridbag.setConstraints(nameLabel, c);
pane.add(nameLabel);
gridbag.setConstraints(name, c);
name.addActionListener(actionListener);
name.addKeyListener(keyListener);
pane.add(name);
c.gridy = 1;
gridbag.setConstraints(passLabel, c);
pane.add(passLabel);
gridbag.setConstraints(pass, c);
pass.addActionListener(actionListener);
pass.addKeyListener(keyListener);
pane.add(pass);
c.gridy = 2;
c.gridwidth = GridBagConstraints.REMAINDER;
c.anchor = GridBagConstraints.CENTER;
JPanel panel = new JPanel();
okButton.addActionListener(actionListener);
okButton.addKeyListener(keyListener);
panel.add(okButton);
cancelButton.addActionListener(actionListener);
cancelButton.addKeyListener(keyListener);
panel.add(cancelButton);
gridbag.setConstraints(panel, c);
pane.add(panel);
getContentPane().add(pane);
pack();
}
/**
* Shows the dialog and returns true if the user pressed ok.
*
* @return true if the the user hit OK, false if the user canceled.
*
* @since ostermillerutils 1.00.00
*/
public boolean showDialog(){
setVisible(true);
return okPressed();
}
}
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