Question

I am buliding an NetBeans Platform application. When the user clicks on the X of the main window I want the application to do nothing and show a password JDialog. If the password is correct close the app, else do not close the app. How do I do this? I’ve created a Listener class that will show the password JDialog, but how do I stop the application from closing? Similar to JFrame’s setDefaultCloseOperation, and setting it to do nothing on close.

    public class Listener extends WindowAdapter {

        private Frame frame;

        @Override
        public void windowActivated(WindowEvent event) {
            frame = WindowManager.getDefault().getMainWindow();
            frame.setSize(946, 768);
        }

        @Override
        public void windowClosing(WindowEvent event) {
            ShutDownMainWindowJDialog shutDownMainWindowJDialog;
            shutDownMainWindowJDialog = new ShutDownMainWindowJDialog(null, true);
            shutDownMainWindowJDialog.exeShutDownMainWindowJDialog();
            shutDownMainWindowJDialog.setLocationRelativeTo(frame);
            shutDownMainWindowJDialog.setVisible(true);
        }
    }

public class Installer extends ModuleInstall {

    @Override
    public void restored() {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                Frame frame = WindowManager.getDefault().getMainWindow();
                frame.addWindowListener(new Listener());
            }
        });
    }
}

Answer 1

It is easy. So create module with installer and overwrite method closing (may by), then show your dialog and return false (not close app). Jirka

So this is conclusion:
add to your module installer/activator

package master;

import org.openide.modules.ModuleInstall;

/**
 * Manages a module's lifecycle. Remember that an installer is optional and
 * often not needed at all.
 */

public class Installer extends ModuleInstall {

 @Override
 public void close() {
  //your module shutdown
 }

 @Override
 public boolean closing() {

 // this is place for your Dialog() and return:
 //
 //        true if you want to enable close the app
 //        other return false
/*
 if you force shutdown app try LifecycleManager.getDefault().exit();
 System.exit(0) is very dummy, because it does not respect betweenmodule dependencyis

 }  
}

Jirka