import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import javax.swing.border.*;

/*

* Simple implementation of a Glass Pane that will capture and ignore all

* events as well paint the glass pane to give the frame a "disabled" look.

*

* The background color of the glass pane should use a color with an

* alpha value to create the disabled look.

*/

public class DisabledGlassPane extends JComponent

implements KeyListener

{

private final static Border MESSAGE_BORDER = new EmptyBorder(10, 10, 10, 10);

private JLabel message = new JLabel();

public DisabledGlassPane()

{

// Set glass pane properties

setOpaque( false );

Color base = UIManager.getColor("inactiveCaptionBorder");

Color background = new Color(base.getRed(), base.getGreen(), base.getBlue(), 128);

setBackground( background );

setLayout( new GridBagLayout() );

// Add a message label to the glass pane

add(message, new GridBagConstraints());

message.setOpaque(true);

message.setBorder(MESSAGE_BORDER);

// Disable Mouse, Key and Focus events for the glass pane

addMouseListener( new MouseAdapter() {} );

addMouseMotionListener( new MouseMotionAdapter() {} );

addKeyListener( this );

setFocusTraversalKeysEnabled(false);

}

/*

* The component is transparent but we want to paint the background

* to give it the disabled look.

*/

@Override

protected void paintComponent(Graphics g)

{

g.setColor( getBackground() );

g.fillRect(0, 0, getSize().width, getSize().height);

}

/*

* The background color of the message label will be the same as the

* background of the glass pane without the alpha value

*/

@Override

public void setBackground(Color background)

{

super.setBackground( background );

Color messageBackground = new Color(background.getRGB());

message.setBackground( messageBackground );

}

//

// Implement the KeyListener to consume events

//

public void keyPressed(KeyEvent e)

{

e.consume();

}

public void keyTyped(KeyEvent e) {}

public void keyReleased(KeyEvent e)

{

e.consume();

}

/*

* Make the glass pane visible and change the cursor to the wait cursor

*

* A message can be displayed and it will be centered on the frame.

*/

public void activate(String text)

{

if (text != null && text.length() > 0)

{

message.setVisible( true );

message.setText( text );

message.setForeground( getForeground() );

}

else

message.setVisible( false );

setVisible( true );

setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));

requestFocusInWindow();

}

/*

* Hide the glass pane and restore the cursor

*/

public void deactivate()

{

setCursor(null);

setVisible( false );

}

}