// This midlet is designed to align drawn text within the application area
// using anchor points

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

public class TextMove extends MIDlet {

  private Display display; // a display
  private TextCanvas canvas; // canvas to display text
  private AnchorPtList anchorPt; // list to query anchor points
  private int anchorPoint = Graphics.BASELINE | Graphics.HCENTER;

  // constructor
  public TextMove(){

    display = Display.getDisplay(this);
    canvas = new TextCanvas(this);
    anchorPt = new AnchorPtList("Anchor Points", List.IMPLICIT, this);
  }

  // startApp
  protected void startApp(){
    showCanvas();
  }

  // pauseApp
  protected void pauseApp(){

  }

  // destroyApp
  protected void destroyApp(boolean unconditional){

  }

  // showCanvas class
  public void showCanvas(){
    display.setCurrent(canvas);
  }

  // showList class to show the implicit list
  public void showList(){
    display.setCurrent(anchorPt);
  }

   public int getAnchorPoint(){
     return anchorPoint;
   }

   public void setAnchorPoint(int anchorPoint){
     this.anchorPoint = anchorPoint;
   }

   public void exitMIDlet(){
     destroyApp(true);
     notifyDestroyed();
   }
}

// TextArea class -- Draw text at a specified place(anchor point)

class TextCanvas extends Canvas implements CommandListener{

  private Command cmExit; //exit midlet
  private Command cmAnchrPt; // Command to query anchor point
  private TextMove midlet;

  // contructor
  public TextCanvas(TextMove midlet){
    this.midlet = midlet;

    // Create the commands and listen for events
    cmExit = new Command("Exit", Command.EXIT, 1);
    cmAnchrPt = new Command("Anchors", Command.SCREEN, 2);

    addCommand(cmExit);
    addCommand(cmAnchrPt);
    setCommandListener(this);
  }

  // Draw a text

  protected void paint(Graphics g){
    int xcent = getWidth()/2; // get the x value of centre of the screen
    int ycent = getHeight()/2; // get the y value of centre of the screen

    // set a font
    g.setFont(Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_ITALIC,
                                  Font.SIZE_MEDIUM));

    // draw a line at the center of display (it is dot)
    g.drawLine(xcent, ycent, xcent, ycent);

    // the dot will be static and the text will move

    g.drawString("Hello Mate!", xcent, ycent, midlet.getAnchorPoint());
  }

  // Show Anchor point or alternatively exit midlet

  public void commandAction(Command c, Displayable d){
    if( c == cmAnchrPt)
      midlet.showList();
      else if (c == cmExit){
        midlet.exitMIDlet();
      }
  }
}

// class AnchorPtList --- alist to query anchor points

class AnchorPtList extends List implements CommandListener{

  private TextMove midlet;

  // contructor
  public AnchorPtList(String title, int ListType, TextMove midlet){

    // call list constructor
    super(title, ListType);

    this.midlet = midlet;

    // Append list members
    append("TOP/LEFT", null);
    append("TOP/HCENTER", null);
    append("TOP/RIGHT", null);

    append("BASELINE/LEFT", null);
    append("BASELINE/HCENTER", null);
    append("BASELINE/RIGHT", null);

    append("BOTTOM/LEFT", null);
    append("BOTTOM/HCENTER", null);
    append("BOTTOM/RIGHT", null);

    setCommandListener(this);
  }

  // define commands to set anchor points
  public void commandAction(Command c, Displayable s){

    switch(getSelectedIndex()) {
      case 0:
        midlet.setAnchorPoint(Graphics.TOP | Graphics.LEFT);
        break;

      case 1:
        midlet.setAnchorPoint(Graphics.TOP | Graphics.HCENTER);
        break;

      case 2:
        midlet.setAnchorPoint(Graphics.TOP | Graphics.RIGHT);
        break;

      case 3:
        midlet.setAnchorPoint(Graphics.BASELINE | Graphics.LEFT);
         break;

       case 4:
         midlet.setAnchorPoint(Graphics.BASELINE | Graphics.HCENTER);
         break;

       case 5:
         midlet.setAnchorPoint(Graphics.BASELINE | Graphics.RIGHT);
         break;

       case 6:
        midlet.setAnchorPoint(Graphics.BOTTOM | Graphics.LEFT);
        break;

      case 7:
       midlet.setAnchorPoint(Graphics.BOTTOM | Graphics.HCENTER);
       break;

      case 8:
       midlet.setAnchorPoint(Graphics.BOTTOM | Graphics.RIGHT);
       break;


       default:
         midlet.setAnchorPoint(Graphics.BASELINE | Graphics.HCENTER);

    }
    midlet.showCanvas();
  }
}