Notification if a modal dialog is shown on top of a JFrame

Question

What listener should I register in a JFrame instance to be notified if a modal JDialog is shown on top of the frame (the frame is the owner of the dialog)? Thanks in advance.

Answer 1

I think JFrame.addWindowListener(...) would work and then pay attention to WindowListener.windowDeactivated(...)

ETA:

jFrame.addWindowListener(new WindowAdapter() {
        @Override
        public void windowDeactivated(WindowEvent e) {
            if(e.getOppositeWindow() instanceof JDialog) {
                JDialog dialog = (JDialog) e.getOppositeWindow();
                if(dialog.isModal()) {
                    // do stuff
                }
            }
        }
    });