/* This project creates an interactive Gauge - we will use methods to change
the value of the gauge. A time will provide us with periodic interruptions */

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.Timer;
import java.util.TimerTask;

public class NonIntGauge extends MIDlet implements CommandListener{
  private Display display; // refer to a display
  private Form fmMain; // Form
  private Command cmExit; // exit command
  private Command cmStop; // stop the download command
  private Gauge gaProg; // Progress gauge
  private Timer tm; // Timer
  private DownloadTimer tt; // the task to run

  public NonIntGauge() {
    display = Display.getDisplay(this);

    // Create the gauge - exit - and stop commands
    gaProg = new Gauge("DownLoad Progress", false, 40, 1);
    cmExit = new Command("Exit", Command.EXIT, 1);
    cmStop = new Command("Stop", Command.STOP, 1);

    // Create form - add commands - listen for events
    fmMain = new Form("Interactive Gauge");
    fmMain.addCommand(cmExit);
    fmMain.addCommand(cmStop);
    fmMain.append(gaProg);
    fmMain.setCommandListener(this);
  }

  // start app
  public void startApp() {
    display.setCurrent(fmMain);

    // Create a timer that fires off every 1 second
    tm = new Timer(); // the timer
    tt = new DownloadTimer(); // the run task
    tm.scheduleAtFixedRate(tt, 0, 1000); // in miliseconds

  }

  // pause app
  public void pauseApp() {

  }
 // destroy app
  public void destroyApp(boolean unconditional){

  }
  public void commandAction(Command c, Displayable s){
    if (c == cmExit){
      destroyApp(false);
      notifyDestroyed();
    }
    else if (c == cmStop){
      // if stop command is pressed - cancel timer - remove stop command and add
      // Exit command to the form - create alaber and set it to Download cancel
      tm.cancel();
      fmMain.removeCommand(cmStop);
      fmMain.addCommand(cmExit);
      gaProg.setLabel("Download Cancelled");
    }
  }

  /* *****************************************************************
      handle the timer task
      ****************************************************************/
     private class DownloadTimer extends TimerTask {
       public final void run()
       {
         // is current value of the gauge equal to the max
         if (gaProg.getValue() - gaProg.getMaxValue() < 0)
           gaProg.setValue(gaProg.getValue() + 1) ;
         else {

             // Remove stop command and replace with exit
             fmMain.removeCommand(cmStop);
             fmMain.addCommand(cmExit);

             // Change gauge label
             gaProg.setLabel("DownLoad Complete!");

             // stop the timer
             cancel();

           }
       }
     }
}