//  GraphicsDemoMIDlet.java  (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2006-03-09  File created.
//  2007-09-02  Last modification.

//  See notes at the end of this file.


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

class GraphicsDemoCanvas extends Canvas
{
   int  canvas_width   =  getWidth() ;
   int  canvas_height  =  getHeight() ;

   public void paint( Graphics graphics )
   {
      graphics.setColor( 255, 255, 255 ) ;  // white color clears the canvas
      graphics.fillRect( 0, 0, canvas_width, canvas_height ) ;

      graphics.setColor( 0, 0, 0 ) ;  // black color is used for drawing

      graphics.drawString( "Canvas size is "  +  canvas_width
                        +  " x "  +  canvas_height, 20, 20,
                           Graphics.TOP | Graphics.LEFT ) ;

      //  Drawing a horizontal line into the middle of canvas area.
      graphics.drawLine( 0, canvas_height / 2,
                         canvas_width, canvas_height / 2 ) ;

      graphics.fillRect( 20, 70, 100, 40 ) ;

      graphics.fillArc(  20, 170, 100, 80,  45, 270 ) ;
      graphics.drawArc( 100, 170, 100, 80, 315,  90 ) ;
   }
}

public class GraphicsDemoMIDlet extends MIDlet
{
   Display  display_of_this_midlet =  Display.getDisplay( this ) ;
   GraphicsDemoCanvas  canvas_of_this_midlet =  new  GraphicsDemoCanvas() ;

   protected void startApp() throws MIDletStateChangeException
   {
      display_of_this_midlet.setCurrent( canvas_of_this_midlet ) ;
   }

   protected void pauseApp()
   {
   }

   protected void destroyApp( boolean unconditional_destruction_required )
   {
   }
}


/* NOTES:

The GraphicsDemoCanvas class could alternatively be written
with a constructor in the following way:

class GraphicsDemoCanvas extends Canvas
{
   int  canvas_width, canvas_height ;

   public GraphicsDemoCanvas()
   {
      canvas_width   =  getWidth() ;
      canvas_height  =  getHeight() ;
   }

   ... 

*/