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


public class StopWatchView extends JFrame {
    private long currentTime;   // the current time
    private long displayTime;   // the display time
    private Timer timer;        // the timer goes off every 1/100 seconds
    private State state;        // the state keeps track of whether the stopwatch
                                // is running
    public JTextArea display;
    
    /** Creates new Model */
    public StopWatchView() throws Exception{
        super ("StopWatch");
        
        display = new JTextArea("00:00:0", 1, 5);
        Container c = getContentPane();
        c.setLayout (new FlowLayout () );
        c.add(display);
        
        addWindowListener (
	  new WindowAdapter() {
            public void windowClosing ( WindowEvent e )
            {
                System.exit ( 0 );
            }
        });
        
	setSize( 120, 150);

        currentTime = 0;
        displayTime = 0;
        timer = new Timer(67, new TimerHandler ());
        state = new Stopped();
        timer.setRepeats(true);
        timer.start();
        
        show();

	EventRemoteGluer startStopEvtRemoteGluer 
	    = new EventRemoteGluer("StartStop");
	startStopEvtRemoteGluer.glue(new startStopEventHandler());

	
	EventRemoteGluer lapEvtRemoteGluer 
	    = new EventRemoteGluer("Lap");
	lapEvtRemoteGluer.glue(new lapEventHandler());

    }

    // getters and setters for the time variables
    public long getCurrentTime () {return currentTime;}
    public void setCurrentTime (long timeArg) {currentTime = timeArg;}
    
    public long getDisplayTime () {return displayTime;}
    public void setDisplayTime (long timeArg) {
        displayTime = timeArg;
        String minutes = Long.toString((displayTime/600)%60);
        if ((displayTime/600)%60 < 10) minutes = "0"+ minutes;
        
        String seconds = Long.toString((displayTime/10%60));
        if ((displayTime/10%60) < 10) seconds = "0" + seconds;
        
        String tenths = Long.toString(displayTime%10);
        
        display.setText( minutes + ":" + seconds + ":" + tenths);
    }
    
    class TimerHandler implements ActionListener {
        public void actionPerformed (ActionEvent e) {
            state.updateTime();
        }        
    }
    
    public interface State {
        public void updateTime();
        public void startStopPushed();
        public void lapPushed();
    }
    
    public class Stopped implements State {
        public void updateTime () { }
        public void startStopPushed() {
            state = new Started();
        }
        public void lapPushed() {
            setCurrentTime(0);
            setDisplayTime(0);
        }        
    }

     public class LapAndStopped implements State {
        public void updateTime () { }
        public void startStopPushed() {
            state = new Started();
        }
        public void lapPushed() {
            setDisplayTime(getCurrentTime());
            state = new Stopped();
        }        
    }

    public class Started implements State {
        public void updateTime () {
            setCurrentTime(getCurrentTime()+1);
            setDisplayTime(getCurrentTime());
        }
        public void startStopPushed() {
            state = new Stopped();
        }
        public void lapPushed() {
            state = new LapAndStarted();
        }        
    }

    public class LapAndStarted implements State {
        public void updateTime () { 
           setCurrentTime(getCurrentTime()+1);
        }
        public void startStopPushed() {
            state = new LapAndStopped();
        }
        public void lapPushed() {
           setDisplayTime(getCurrentTime());
           state = new Started();
        }        
    }

    public class startStopEventHandler implements EventHandler {
        public void handle(Event event) {
            state.startStopPushed();
        }
    }
    
    public class lapEventHandler implements EventHandler {
        public void handle(Event event) {
            state.lapPushed();
        }
    }
    
    public static void main (String args []) throws Exception{
        StopWatchView swv = new StopWatchView();
    }   
}