Java User Interface Events

   class TGWexample2 extends TurtleGraphicsWindow
   {

      public void tgKeyReleased(int keyNum)
      {
         switch ( keyNum )
         {
            case TGKeyHandler.DOWN_ARROW:
               back( 5 );
               break;
            case TGKeyHandler.LEFT_ARROW:
               left( 5 );
               break;
            case TGKeyHandler.RIGHT_ARROW:
               right( 5 );
               break;
            case TGKeyHandler.UP_ARROW:
               forward( 5 );
               break;
         }
      }

      public void tgKeyTyped(char keyChar)
      {
         switch ( keyChar )
         {
            case 'd':
	       setpencolor( BLACK );
               pendown();
               break;
            case 'u':
	       setpencolor( WHITE );
               penup();
               break;
         }
      }

      public void tgMouseClicked( int x, int y )
      {
         System.out.println( "tgMouseClicked( " + x + ", " + y + ")" );
         setxy( x, y );
      }

      public static void main(String[] args)
      {
         TGWexample2 me = new TGWexample2();
         me.setpensize( 8 );
         me.setshape( ARROW );
      }

   } // end class TGWexample2