import java.awt.*;
import java.awt.event.*;

// A dialog box that asks the user to confirm the File | Exit
// choice
public class QuitDialog extends Dialog
{
   	Label label1;
	Panel panel1;
	Button okButton;
	Button cancelButton;
   
	public QuitDialog(Frame parent, boolean modal)
	{
		super(parent, modal);
		setTitle("Last Chance");

		setLayout(new BorderLayout(0,0));
		setVisible(false);
		setSize( 150, 100 );

		label1 = new Label("Do you really want to quit?",Label.CENTER);
		add("Center", label1);
		
		panel1 = new Panel();
		panel1.setLayout(new FlowLayout());
		add("South", panel1);
		
		okButton = new java.awt.Button();
		okButton.setLabel("   Ok   ");
		panel1.add(okButton);
		
		cancelButton = new java.awt.Button();
		cancelButton.setLabel("Cancel");
		panel1.add(cancelButton);

		this.addWindowListener( new MyWindowAdapter() );
		
		ButtonListener buttonListener = new ButtonListener();
		cancelButton.addActionListener(buttonListener);
		okButton.addActionListener(buttonListener);
	}

    // The following two classes are inner classes.

    // This class listens for window related events.  It extends
    // java.awt.event.WindowAdapter, which provides empty "stub"
    // implementations for each method in the interface
    // java.awt.event.WindowListener.
    class MyWindowAdapter extends WindowAdapter
	{
		public void windowClosing(WindowEvent event)
		{
			dispose();
		}
	}

    // Since this class listens for events from two classes (buttons),
    // it uses the getSource() method to find out which button
    // sent the event message.
	class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			Object object = event.getSource();
			if (object == cancelButton)
                // remove the dialog from the screen
	            QuitDialog.this.dispose();
			else 
                // Send a window closing event to the parent of the
                // dialog box, i.e. the main application window.
        		Toolkit.getDefaultToolkit().getSystemEventQueue().
                   postEvent(new WindowEvent((java.awt.Window)getParent(),
                                             WindowEvent.WINDOW_CLOSING));
		}
	}
}