/**
   @version 1.41 2004-05-04
   @author Cay Horstmann
*/

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

 public   class  MulticastTest
{
    public   static   void  main(String[] args)
   {
      MulticastFrame frame =  new  MulticastFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }
}

/**
   A frame with buttons to make and close secondary frames
*/
 class  MulticastFrame  extends  JFrame
{
    public  MulticastFrame()
   {
      setTitle("MulticastTest");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

      // add panel to frame

      MulticastPanel panel =  new  MulticastPanel();
      add(panel);
   }

    public   static   final   int  DEFAULT_WIDTH =  300 ;
    public   static   final   int  DEFAULT_HEIGHT =  200 ;  
}

/**
   A panel with buttons to create and close sample frames.
*/
 class  MulticastPanel  extends  JPanel
{
    public  MulticastPanel()
   {
      // add "New" button

      JButton newButton =  new  JButton("New");
      add(newButton);
       final  JButton closeAllButton =  new  JButton("Close all");
      add(closeAllButton);

      ActionListener newListener =  new  
         ActionListener()
         {
             public   void  actionPerformed(ActionEvent event)
            {
               BlankFrame frame =  new  BlankFrame(closeAllButton);
               frame.setVisible(true);
            }
         };

      newButton.addActionListener(newListener);
   }
}

/**
   A blank frame that can be closed by clicking a button.
*/
 class  BlankFrame  extends  JFrame
{
   /**
      Constructs a blank frame
      @param closeButton the button to close this frame
   */
    public  BlankFrame( final  JButton closeButton)
   {
      counter++;
      setTitle("Frame " + counter);
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      setLocation(SPACING * counter, SPACING * counter);     
      
      closeListener =  new  
         ActionListener()
         {
             public   void  actionPerformed(ActionEvent event)
            {
               closeButton.removeActionListener(closeListener);
               dispose();
            }
         };
      closeButton.addActionListener(closeListener);
   }

    private  ActionListener closeListener;
    public   static   final   int  DEFAULT_WIDTH =  200 ;
    public   static   final   int  DEFAULT_HEIGHT =  150 ;  
    public   static   final   int  SPACING =  40 ;
    private   static   int  counter =  0 ;
}