// This project maps Command to a Button

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class CommandMap extends MIDlet implements CommandListener{
  private Display myDisplay; // reference to display
  private Form Main; // define main form
  private TextBox tbHelp; // textbox for displaying text message
  private Command Exit; // command for exit
  private Command Help; // help command
  private Command Back; // return to the main form

  public CommandMap(){
    myDisplay = Display.getDisplay(this);
    Back = new Command("Back", Command.BACK,1);
    Help = new Command("Help", Command.HELP,1);
    Exit = new Command("Exit", Command.EXIT,1);

    // create the form - add commands - listen for events
    //First screen commands
    Main = new Form ("J2ME Commands");
    Main.addCommand(Exit);
    Main.addCommand(Help);
    Main.setCommandListener(this);

    // create help textbox with maximum 30 characters
    tbHelp = new TextBox("Help", "This text is here to Help you!", 30,0);
    tbHelp.addCommand(Back); // add the back command to the screen
    tbHelp.setCommandListener(this);

  }
  // start MIDlet
  public void startApp(){
    myDisplay.setCurrent(Main);
  }
  public void pauseApp(){

  }
  public void destroyApp(boolean unconditional){

  }
  // process events
  public void commandAction(Command c, Displayable s){
    if (c == Exit){
      destroyApp(false);
      notifyDestroyed();
    }
    else if (c ==Help)
      myDisplay.setCurrent(tbHelp);
    else if (c == Back)
      myDisplay.setCurrent(Main);
  }
  }