//CueBuilder.java
//Generates a timeline for Multimedia
//Demonstrates threading, date and time manipulation
//Andy Harris, 05/00

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.util.Date;
import java.text.SimpleDateFormat;

public class CueBuilder extends Applet implements Runnable{

  Date startTime = new Date();
  Date currentTime;

  SimpleDateFormat formatter = new SimpleDateFormat("mm:ss");

  Label lblTimer = new Label("00:00");
  TextArea txtCueList = new TextArea();
  Button btnReset = new Button("Reset timer");
  Button btnAddCue = new Button("Add Cue");
  
  EventHandler evt = new EventHandler();

  Thread theThread;

  public void init(){
    //set up applet
    setLayout(new BorderLayout());
    add(lblTimer, BorderLayout.NORTH);
    lblTimer.setAlignment(Label.CENTER);

    add(txtCueList, BorderLayout.CENTER);
    Panel pnlSouth = new Panel();
    pnlSouth.add(btnReset);
    pnlSouth.add(btnAddCue);
    add(pnlSouth, BorderLayout.SOUTH);

    btnReset.addActionListener(evt);
    btnAddCue.addActionListener(evt);
  } // end init

  public void start(){
    if (theThread == null){
      theThread = new Thread(this);
      theThread.start();
    } // end if
  } // end start

  public void stop(){
    theThread = null;
  } // end stop

  public void run(){
    while(true){
      currentTime = new Date();
      long elapsedRaw = currentTime.getTime() - startTime.getTime();
      Date elapsedTime = new Date(elapsedRaw);
      String time = formatter.format(elapsedTime);
      lblTimer.setText(time);
    } // end while
  } // end run

  private class EventHandler implements ActionListener{
    public void actionPerformed(ActionEvent e){
      if (e.getSource() == btnReset){
	startTime = new Date();
	txtCueList.setText("");
      } else if (e.getSource() == btnAddCue){
        txtCueList.append(lblTimer.getText());
        txtCueList.append("\t\n");
      } // end if
    }  //end actionPerformed
  } // end EventHandler
  
} // end class def