Translate Coordinates

/*
J2ME: The Complete Reference

James Keogh

Publisher: McGraw-Hill

ISBN 0072227109

*/
//jad file (please verify the jar size)
/*
MIDlet-Name: TranslateCoordinates
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: TranslateCoordinates.jar
MIDlet-1: TranslateCoordinates, , TranslateCoordinates
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100

*/

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

public class TranslateCoordinates extends MIDlet
{
  private Display  display;     
  private MyCanvas canvas;   
  public TranslateCoordinates ()
  {
    display = Display.getDisplay(this);
    canvas  = new MyCanvas (this);
  }
  protected void startApp()
  {
    display.setCurrent( canvas );
  }
  protected void pauseApp()
  { 
  }
  protected void destroyApp( boolean unconditional )
  { 
  }
  public void exitMIDlet()
  {
    destroyApp(true);
    notifyDestroyed();
  }
  class MyCanvas extends Canvas implements CommandListener
  {
    private Command exit;  
    private TranslateCoordinates translateCoordinates;
    private Image image = null;
    public MyCanvas(TranslateCoordinates translateCoordinates)
    {
      this. translateCoordinates = translateCoordinates;
      exit = new Command("Exit", Command.EXIT, 1);
      addCommand(exit);
      setCommandListener(this);
      try
      {
        image = Image.createImage(70, 70);
        Graphics graphics = image.getGraphics();
        graphics.setColor(255,0,0);
        graphics.fillArc(10, 10, 60, 50, 180, 180);      
      }
      catch (Exception error)
      {
        Alert alert = new Alert("Failure", 
                         "Creating Image", null, null);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert);
      }    
    } 
    protected void paint(Graphics graphics)
    {
      if (image != null)
      {
       graphics.setColor(255,255,255);
       graphics.fillRect(0, 0, getWidth(), getHeight());
       graphics.translate(45, 45);
       graphics.drawImage(image, 0, 0, 
                      Graphics.VCENTER | Graphics.HCENTER);    }
    }
    public void commandAction(Command command, Displayable display)
    {
      if (command == exit)
      {
        translateCoordinates.exitMIDlet();
      }
    }
  }
}

1.	Simple Midlet Demo
2.	Piano MIDlet
3.	Pacer
4.	Pointer Example
5.	Text Example
6.	Simple Canvas
7.	Illustrate Graphics MIDlet
8.	Key Canvas
9.	Box Text Canvas
10.	Offscreen MIDlet
11.	Quatsch MIDlet
12.	Sweep Game
13.	Sweep
14.	Text MIDlet
15.	Translate coordinate system
16.	Show various anchor points
17.	Draw mutable image on a canvas
18.	Canvas for processing key code and commands
19.	Draw immutable image on a canvas
20.	Use pointer events to draw onto the Canvas
21.	A quick sample of graphics, commands, and event handling.

Translate Coordinates : 2D « J2ME « Java

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