🚀 go-pugleaf

Adrian -

dispose() causes all native resources (i.e. handles, graphics resources, 
etc.) to be released back to the underlying OS. I'm not sure what is 
causing your hangup, but I'll bet somehow you have a reference between 
those two frames, so they are each holding on to a hard reference to 
something causing a deadlock.

You can also structure your main app to switch between login and module 
frames in a number of ways. Here is one:

public class Examples {
   boolean packFrame = false;

   //Construct the application
   public Examples() {
     ModuleFrame module = null; // Interface, hopefully!
     LoginFrame l = new LoginFrame(); // login frame
     l.pack();
     //Center the window
     Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
     Dimension frameSize = l.getSize();
     if (frameSize.height > screenSize.height) {
       frameSize.height = screenSize.height;
     }
     if (frameSize.width > screenSize.width) {
       frameSize.width = screenSize.width;
     }
     l.setLocation( (screenSize.width - frameSize.width) / 2,
                        (screenSize.height - frameSize.height) / 2);
     boolean keepGoing = true;
     while ( keepGoing ) {
       l.setVisible(true);
       // Login is now visible. When it is closed, the user has indicated
       // somehow what action should be taken, including whether to end
       // the application, or open a new module. hide() is used, not
       // displose()
       switch ( l.getUserAction ) {
          case LoginFrame.CLOSE_APPLICATION :
             keepGoing = false;
             break;
          case LoginFrame.EXEC_MODULE :
             // Determine the module, credentials, etc. and instance the
             // appropriate ModuleFrame. This could be done generically
             // using Java reflection, or specifically if the modules
             // are unlikely to change.
             ModuleFrame frame = (ModuleFrame)<mechanism of choice>;
             frame.setVisible( true );
             // Determine if close means close the app or not, and
             // take appropriate action
             break;
          case LoginFrame.PASSWORD_EXCEPTION :
             // etc.
       }
   }

   //Main method
   public static void main(String[] args) {
     try {
       UIManager.setLookAndFeel(
        UIManager.getSystemLookAndFeelClassName());
     }
     catch(Exception e) {
       e.printStackTrace();
     }
     new Examples();
   }
}


-- 
Tad Frysinger [TeamB]