// This example from the book Java in a Nutshell by David Flanagan.
// Written by David Flanagan.  Copyright (c) 1996 O'Reilly & Assc.
// You may study, modify, this example for any purpose.
// This example is WITHOUT WARRANTY either expressed or implied.
// Modiied by Kandice A. Null 4/96 to add a window and tearoff menu and buttons.

import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;

public class wind2 extends Applet 
{
    public static final int PORT = 6789;
    Socket s;
    DataInputStream in;
    PrintStream out;
    TextField inputfield;
    TextArea outputarea;
    StreamListener listener;
    Frame window;
    MenuBar menbar;   
    Menu men;
    
  // Create a socket to communicate with a server on port 6789 of the
  // host that the applet's code is on.  Create streams to use with
  // the socket.  Then create a TextField for user input and a TextArea
  // for server output.  Finally, create a thread to wait for and 
  // display server output.
    public void init() 
	{
        try 
	{
	
            s = new Socket(this.getCodeBase().getHost(), PORT);
            in = new DataInputStream(s.getInputStream());
            out = new PrintStream(s.getOutputStream());

 System.out.println("here in applet!!");

            
            this.add(new Button ("Open Window"));
            this.add(new Button ("Close Window"));
            this.add(new Button ("Quit Window"));
            window = new Frame("Client Window");
            this.add(window);  
            inputfield = new TextField();
            outputarea = new TextArea(); 
            window.setLayout (new BorderLayout());
            window.add("North", inputfield);
            window.add("Center", outputarea);
            menbar = new MenuBar();
            men = new Menu("Options",true); 
            men.add(new MenuItem ("Open"));
            men.add(new MenuItem ("Close"));
            men.add(new MenuItem ("Quit"));
            menbar.add(men);
            menbar.setHelpMenu(men);
            window.setMenuBar(menbar);

            window.resize(500,300);
           // window.show();
             

            listener = new StreamListener(in, outputarea);

            this.showStatus("Connected to " 
                    + s.getInetAddress().getHostName() 
                    + ":" + s.getPort());

       }
        catch (IOException e) this.showStatus(e.toString());
    }
    
    // When the user types a line, send it to the server.
    public boolean action(Event e, Object what) {
          if (e.target instanceof Button) {
             String label = (String)what;
             if (label.equals("Open Window")) {
                 if (!window.isShowing())
                     window.show();
             }
             else if (label.equals("Close Window")) {
                 if (window.isShowing())
                     window.hide();
             }
             else if (label.equals("Quit Window")) {
                 window.dispose();
                 System.exit(0);
             }
             return true;
         }
         else if (e.target instanceof MenuItem) {
                 String l = (String)what;
                 if (l.equals("Open")) {
                     if (!window.isShowing())
                        window.show();
                 }
                 else if (l.equals("Close")) {
                     if (window.isShowing())
                         window.hide();
                 } 
                 else if (l.equals("Quit")) {
                      outputarea.setText("Quitting the Window");
                      inputfield.setText("Quit Window");
                      window.dispose();
                      System.exit(0);
                }
                return true;
         }

         else if (e.target == inputfield) {
            out.println((String)e.arg);
            inputfield.setText("");
            return true;
        }

        else return false;
     }   

}


// Wait for output from the server on the specified stream, and display
// it in the specified TextArea.
class StreamListener extends Thread {
    DataInputStream in;
    TextArea output;
    public StreamListener(DataInputStream in, TextArea output) {
        this.in = in;
        this.output = output;
        this.start();
    }
    public void run() {
        String line;
        try {
            for(;;) {
                line = in.readLine();
                if (line == null) break;
                output.setText(line);
            }
        }
        catch (IOException e) output.setText(e.toString());
        finally output.setText("Connection closed by server.");
    }
}