// Create a Canvas for processing game actions

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

public class MapGameActions extends MIDlet {
  
  private Display display; // A display
  private GameActionCanvas canvas; // canvas
  
  public MapGameActions() {
    display = Display.getDisplay(this);
    canvas = new GameActionCanvas(this);
  }
  
  protected void startApp(){
    display.setCurrent(canvas);
  }
  
  protected void pauseApp(){
    
  }
  
  protected void destroyApp(boolean unconditional){
    
  }
  
  public void exitMIDlet(){
    destroyApp(true);
    notifyDestroyed();
  }
}

/* Game action event handling */
class GameActionCanvas extends Canvas implements CommandListener{
  
  private Command cmExit; // exit command
  private String keyText = null; // key code text
  private MapGameActions midlet;
  
  // constructor
  public GameActionCanvas(MapGameActions midlet) {
    this.midlet = midlet;
    
    // create exit command & listen for events
    cmExit = new Command("Exit", Command.EXIT, 1);
    addCommand(cmExit);
    setCommandListener(this);
  }
  // paint the text representing the key code
  protected void paint(Graphics g) {
    g.setColor(255,255,255); // clear the background to white
    g.fillRect(0,0, getWidth(), getHeight());
    
    // set colour and draw text
    if(keyText != null) {
      // draw with red pen
      g.setColor(255, 0, 0);
      // centre the text
      g.drawString(keyText, getWidth()/2, getHeight()/2, Graphics.TOP | Graphics.HCENTER);
    }
  }
  
  // event handling
  public void commandAction(Command c, Displayable d){
    if (c == cmExit)
      midlet.exitMIDlet();
  }
  // game action event handling and converted into key code
  
  protected void keyPressed(int keyCode) {
    switch(getGameAction(keyCode)) {
      // place action inside the case
      case UP:
        case DOWN:
          case LEFT:
            case FIRE:
              case GAME_A:
                case GAME_B:
                  case GAME_C:
                    case GAME_D:
                      default:
                        // The default value to be the text of the agme action
                        keyText = getKeyName(keyCode);
    }
    repaint();
  }
  
}