Java SE (Java Platform, Standard Edition)

I am having trouble with implementing a glasspane on a JDialog.
Using the swing glasspane tutorial as a base I am trying to apply this to a JDialog.
Everything appears to work OK until I setDefaultLookandFeel(true) on the JDialog.
Events are propogated onto components on the JDialog (under the glasspane) but the JDialog doesn't appear to receive events such as dragging; clicking the top right had corner close cross.

Open the dialog by clicking the button
Dialog can be moved and closed; buttons work
Click the Checkbox to apply the Glasspane
Dragging no longer works; Cannot close
Buttons function as indicated.
Uncheck Checkbox; dragging etc functions correctly.

Finally be removing the JDialog.setDefaultLookandFeel(true) the dialog can be dragged even when the glasspane is raised.

Can anyone explain please?

import javax.swing.event.MouseInputAdapter;
import java.io.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

class NotepadTest {

	TextPanel jp;

	JFrame jframe;

	JMenuBar menuBar;

	GlassDialog gd;

	NotepadTest() {
		JFrame.setDefaultLookAndFeelDecorated(true);
		JDialog.setDefaultLookAndFeelDecorated(true);
		jframe = new JFrame("NotePad Test");

		jp = new TextPanel();
		jp.init();

		jframe.getContentPane().add(jp, BorderLayout.CENTER);

		jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jframe.pack();

		jframe.setVisible(true);

	}

	public static void main(String args[]) {
		NotepadTest np = new NotepadTest();
	}


	class CheckAction implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			clickedCheckBox(e);
		}

	}

	void clickedCheckBox(ActionEvent e) {
		gd.myGlassPane.setVisible(((JCheckBox) e.getSource()).isSelected());
	}


	class dialogAction implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			gd = new GlassDialog(jframe);

			gd.show();

		}

	}


	class TextPanel extends JPanel {
		TextPanel() {
		}

		void init() {
			JCheckBox jcb = new JCheckBox("Glass Pane");
			add(jcb);

			jcb.addActionListener(new CheckAction());

			add(Box.createHorizontalGlue());

			JButton jbDialog = new JButton("Dialog");
			add(jbDialog);
			jbDialog.addActionListener(new dialogAction());
	
		}
	}

	class GlassDialog extends MouseAdapter{
		private MyGlassPane myGlassPane;

		JDialog jdialog;

		JPanel jp;

		Container contentPane;

		GlassDialog(JFrame jframe) {
			jdialog = new JDialog(jframe, false);
			jp = new JPanel();
			
			contentPane = jdialog.getContentPane();
			contentPane.add(jp);
		}

		GlassDialog() {
			this(null);
		}

		JButton jbtn,jbtnBlock;

		void show() {
			jdialog.setPreferredSize(new Dimension(200, 100));
			jdialog.pack();
			jbtn = new JButton("Works thru GlassPane");
			jbtn.setActionCommand("Works thru GlassPane");
			jbtn.addMouseListener(this);

			jbtnBlock = new JButton("Blocked byGlassPane");
			jbtnBlock.setActionCommand("Blocked byGlassPane");
			jbtnBlock.addMouseListener(this);

			myGlassPane = new MyGlassPane(jbtn, menuBar, jdialog
					.getContentPane());

			jdialog.setGlassPane(myGlassPane);
			myGlassPane.setVisible(false);

			jp.add(jbtn);

			jp.add(jbtnBlock);
			jdialog.setVisible(true);
		}
		
		public void mouseClicked(MouseEvent e)
		{
			System.out.println(((JButton)e.getSource()).getActionCommand());	
		}

		class MyGlassPane extends JComponent {

			public MyGlassPane(AbstractButton aButton, JMenuBar menuBar,
					Container contentPane) {
				CBListener listener = new CBListener(aButton, menuBar, this,
						contentPane);
				addMouseListener(listener);
				addMouseMotionListener(listener);
			}
		}

		class CBListener extends MouseInputAdapter {

			Toolkit toolkit;

			Component liveButton;

			JMenuBar menuBar;

			MyGlassPane glassPane;

			Container contentPane;

			public CBListener(Component liveButton, JMenuBar menuBar,
					MyGlassPane glassPane, Container contentPane) {
				toolkit = Toolkit.getDefaultToolkit();
				this.liveButton = liveButton;
				this.menuBar = menuBar;
				this.glassPane = glassPane;
				this.contentPane = contentPane;
			}

			public void mouseClicked(MouseEvent e) {
				redirectEvent(e);
			}

			public void mouseEntered(MouseEvent e) {
				redirectEvent(e);
			}

			public void mouseExited(MouseEvent e) {
				redirectEvent(e);
			}

			public void mousePressed(MouseEvent e) {
				redirectEvent(e);
			}

			public void mouseReleased(MouseEvent e) {
				redirectEvent(e);
			}

			public void mouseDragged(MouseEvent e) {
				redirectEvent(e);
			}

			public void mouseMoved(MouseEvent e) {
				redirectEvent(e);
			}

			private void redirectEvent(MouseEvent e) {
				boolean repaint = false;
				Point glassPanePoint = e.getPoint();
				Container container = contentPane;
				Point containerPoint = SwingUtilities.convertPoint(glassPane,
						glassPanePoint, contentPane);

				// The mouse event is probably over the content pane.
				// Find out exactly which component it's over.
				Component component = SwingUtilities.getDeepestComponentAt(
						container, containerPoint.x, containerPoint.y);

				if ((component != null) && (component.equals(liveButton))) {

					Point componentPoint = SwingUtilities.convertPoint(
							glassPane, glassPanePoint, component);
					component.dispatchEvent(new MouseEvent(component,
							e.getID(), e.getWhen(), e.getModifiers(),
							componentPoint.x, componentPoint.y, e

							.getClickCount(), e.isPopupTrigger()));
				}

			}
		}

	}
}