TimerView_A

package timer;

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


/**
 * @author Vita Wiebe
 * @version LA11: Timer
 */

/**
 * This class generates a simple GUI stopwatch.
 * Chiefly responsible for the visual component of this
 * application.
 */
public class TimerView {

   // Fields

   // I established the frame title as a final field
   // to make it easier to change later.
   public final String TITLE = "This is a Timer, silly.";

   private enum buttState {STARTED, PAUSED, STOPPED};
   private buttState state;

   private JFrame win;

   // "Output" is the timer's display of the time elapse.
   private JLabel output;

   private TimerThread timerT;

   /**
    * Our constructor.  Builds a window and adds all the goodies
    * that make it a fully-functional timer.
    */
   public TimerView() {

      timerT = null;

      // Our top-level element (container).
      win = new JFrame(TITLE);
      win.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
      win.setSize(500, 500);
      win.setLocation(0, 0);

      // Create the buttons which will control the timer.
      JButton start = new JButton("Start");
      JButton reset = new JButton("Reset");
      state = buttState.STOPPED;
      TimerView self = this;
      start.addMouseListener(new MouseAdapter()
            {
            @Override
            public void mouseClicked(MouseEvent clicked) {

               if(state == buttState.STOPPED) {
               start.setText("Pause");
               state = buttState.STARTED;
               timerT = new TimerThread(self);
               timerT.start();

               } else if (state == buttState.STARTED) {
                     start.setText("Continue");
                     state = buttState.PAUSED;
                     timerT.suspend();

               } else {
                     start.setText("Pause");
                     state = buttState.STARTED;
                     timerT.resume();
               }
            }
            });

      reset.addMouseListener(new MouseAdapter()
            {
            @Override
            public void mouseClicked(MouseEvent clicked) {
               // Stop the timer
               // Reset the timer to zero.
               start.setText("Start");
               state = buttState.STOPPED;
               timerT.stop();
               output.setText("0.00");
               }
            });

      JPanel buttonPanel = new JPanel();
      buttonPanel.setSize(100, 200);
      buttonPanel.add(start);
      buttonPanel.add(reset);

      // This is our visual representation of
      // the output of the timer.
      output = new JLabel("0.00");

      output.setHorizontalAlignment(JLabel.CENTER);
      output.setFont(new Font("Arial", Font.PLAIN, 36));

      win.add(buttonPanel);
      win.add(output);
      win.setVisible(true);
   }

   public void repaint() {
      if(timerT != null) {
         output.setText("" + timerT.getElapsedTime());
         win.repaint();
      }
   }


   // Nested inner class for running the timer.
   class TimerThread extends Thread {

      // Nested fields

      private double elapsedTime;
      private TimerView timerV;
      private boolean running;

      public TimerThread(TimerView t) {
         elapsedTime = 0.00;
         running = false;
         timerV = t;
      }

      public double getElapsedTime() {
         return elapsedTime;
      }

      public void run() {
         while(true) {
            try {
               // Ten is thousandth of a second (a.k.a. millisecond)
               sleep(10);
               elapsedTime += 0.01;
               timerV.repaint();
            } catch(InterruptedException e) {
                  System.err.print(e.getMessage());
            }
         }
      }
   }

   /**
    * @param String[] args, the command-line arguments
    * (not used in this application)
    */
   public static void main(String[] args) {
      new TimerView();

   }
}