JOptionPane and JDialog.DO_NOTHING_ON_CLOSE broken?

Question

Hi there
I've created a JDialog from a JOptionPane and I don't want the user to simply dispose of the dialog by clicking on the close button but they are still able and I'm sure that my code is correct. Is it my code that is wrong or is it a java bug? Oh I'm running on 1.3 BTW
JFrame f = new JFrame();
f.setSize(500, 500);
f.setVisible(true);
JOptionPane optionPane = new JOptionPane("Hello there", JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION);
JDialog d = optionPane.createDialog(f, "Testing");
d.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
d.setVisible(true);I know that I can just set up a JDialog directly and use the setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE) and it seems to work properly but I would like to see it work for JOptionPane!
Thanks in advance

Answer 1

Sorry but this doesn't make it work either. I've looked at the code for createDialog in JOptionPane and it actually adds a WindowListener to the dialog in there as well as a propertyListener. On closing the option pane it calls a method in windowClosing of the windowListener which in turn fires a property change event which then tells the dialog to dispose itself so the addition of another windowAdapter to override the windowClosing method will not help :-(
I've managed to get round it by doing something similar to
JFrame frame = new JFrame();
final JDialog dialog = new JDialog(frame, "Testing", true);
JButton button = new JButton("OK");
button.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
    dialog.dispose();
JOptionPane optionPane = new JOptionPane(button, JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION);
dialog.setContentPane(optionPane);
dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
dialog.pack();
dialog.setVisible(true);