Help Me Click the Default Button

[T Eakins]

Hi,
I've got a popup control to capture a password. However, I can't get the 'OK' button to be the default button such that when I type in a password and hit enter, the OK button would be clicked. Instead, I have to tab out and hit space, or I have to click it with the mouse button.
I've tried many combinations. The most recent attempt (listed, below) is to capture the VK_ENTER, move focus to the next control (the 'OK' button), and press the space key.
I must be doing something wrong, though. I get the focus to move forward, but no luck with clicking the space.
Any help is greatly appreciated!!

 
public static boolean login(View view, File file) {
    String localRoot = null;
    try {
        localRoot = getRoot(file);
    } catch (java.io.IOException ioe) {
        return false;
    }
    class PwdKeyListener implements KeyListener {
        //User pressed enter - move to next field and press space
        public void keyReleased(KeyEvent e) {
            if ( e.getKeyCode() == KeyEvent.VK_ENTER ) {
//PROBLEM HERE
                //press the "default" button
                //e.consume();
                e.getComponent().transferFocus(); //THIS WORKS
                KeyEvent e2 = new KeyEvent(e.getComponent(), e.getID(),
                                           e.getWhen(), e.getModifiers(),
                                           e.VK_SPACE);
                e.getComponent().getPeer().handleEvent(e2); //THIS DOESN'T
//END PROBLEM AREA
            }
        }
        //Ignored
        public void keyTyped(KeyEvent e) {}
        //Ignored
        public void keyPressed(KeyEvent e) {}
    }

    JPasswordField passwordField = new JPasswordField(10);
    passwordField.addKeyListener( new PwdKeyListener() );
    Object[] messageArray = {"Password:", passwordField};
    String[] optionArray = {"OK", "Cancel"};
    int response = JOptionPane.showOptionDialog(view,
                   messageArray,
                   "password for " + localRoot,
                   JOptionPane.YES_NO_OPTION,
                   JOptionPane.QUESTION_MESSAGE,
                   null,
                   optionArray,
                   null);
    if (response == 0) {
        String password = new String(passwordField.getPassword());
        //handle password craftily
        return true;
    } else {
        return false;
    }
}

[ February 20, 2004: Message edited by: Tim E. ]

[Gregg Bolinger]

You can add an ActionListener to a JPasswordField. So something like....

passwordField.addActionListener(new ActionListener()
{
   public void actionPerformed(ActionEvent e)
   {
      loginAction(e);
   }
});
submitButton.addActionListener(new ActionListener()
{
   public void actionPerformed(ActionEvent e)
   {
      loginAction(e);
   }
});
private void loginAction(ActionEvent e)
{
   //Do whatever here
}

You don't have to pass the ActionEvent to your loginAction method if you don't want to. Only if you need access to that object.
Another thing you can try which I can't get to work 100% of the time is:
getRootPane().setDefaultButton(submitButton);
Sometimes this works for me, other times it doesn't. That's why I usually just do it the first way I suggested. It works all the time.
[ February 20, 2004: Message edited by: Gregg Bolinger ]

[T Eakins]

Thanks for the help.
Unfortunately, I don't have the submitButton handle because I am using the java's standard modal dialog boxes:

int response = JOptionPane.showOptionDialog(view,
messageArray,
"password for " + localRoot,
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE,
null,
optionArray,
null);

Maybe it just can't be done without creating my own dialog box. Any other thoughts?

[Gregg Bolinger]

Well, ShowInputDialog() does what you want. Problem with that is I don't know of a way to specify a JPasswordField so your input wouldn't be masked. The only way to do what you want is to write a custom dialog by extending JDialog.

[T Eakins]

Yep, I've tried a lot of different approaches and I didn't see a way, either. That seemed like something that should be available because I could envision a scenario where I needed to add some other type of ActionListener to the OK button before processing.
Thanks again for your help. I'll write a small custom dialog box to force it.

[Dana Hanna]

How strange that this isn't supported...
What JDK version?
Have you looked at the source for JOptionPane to see if it attempts such functionality?

[Nathan Pruett]

Here's how I got it to work... the only issue I would like to fix would be how to get the username field to be the initial selection when the optionpane comes up. I tried adding a component listener to the panel and to the username text field, but neither worked...

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
  
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
  
public class LoginOptionPane extends JFrame implements ActionListener {
    
    private JButton login;
    private JTextField username;
    private JPasswordField password;
    private JPanel loginPanel;
    
    public LoginOptionPane() {
        super( "Login OptionPane" );
        JPanel p = new JPanel();
        p.setLayout( new FlowLayout( FlowLayout.CENTER ) );
        login = new JButton( "Login" );
        login.addActionListener( this );
        p.add( login );
        getContentPane().add( p );
        
        username = new JTextField( 15 );
        username.addActionListener( new UserNameActionListener() );
        password = new JPasswordField( 15 );
        password.addActionListener( new PasswordActionListener() );
        loginPanel = new JPanel();
        loginPanel.setLayout( new BoxLayout( loginPanel, BoxLayout.Y_AXIS ) );
        JPanel userPanel = new JPanel();
        userPanel.setLayout( new FlowLayout( FlowLayout.RIGHT ) );
        userPanel.add( new JLabel( "username: " ) );
        userPanel.add( username );
        loginPanel.add( userPanel );
        JPanel passwPanel = new JPanel();
        passwPanel.setLayout( new FlowLayout( FlowLayout.RIGHT ) );
        passwPanel.add( new JLabel( "password: " ) );
        passwPanel.add( password );
        loginPanel.add( passwPanel );
    }
    
    public void actionPerformed( ActionEvent e ) {
        username.setText( "" );
        password.setText( "" );
        int result = JOptionPane.showOptionDialog( this, loginPanel, "Login", 
                JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE,
                null, null, null );
        System.out.println( result );
        System.out.println( username.getText() );
        System.out.println( password.getPassword() );
    }
    
    public static void main( String[] args ) {
        JFrame f = new LoginOptionPane();
        f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        f.setSize( 300, 300 );
        f.setLocationRelativeTo( null );
        f.setVisible( true );
    }
    
    private class UserNameActionListener implements ActionListener {
        public void actionPerformed( ActionEvent e ) {
            password.requestFocus();
        }
    }
    
    private class PasswordActionListener implements ActionListener {
        public void actionPerformed( ActionEvent e ) {
            password.getRootPane().getDefaultButton().doClick();
        }
    }
}

(NEP - removed long line in code that was widening the page )
[ February 24, 2004: Message edited by: Nathan Pruett ]

[Gregg Bolinger]

And this is why Nathan is the king!

[Jose Botella]

Nice example Nathan!