package demo.helicopter;

import java.awt.*;
import java.awt.geom.*;
import java.awt.geom.Arc2D.Double;
import java.awt.event.*;
import javax.swing.*;

/**
 *
 * @author  Thomas Miller
 * @version 1.0
 */

 public class Compass extends JPanel {

   /** Creates new Compass */

   /**
    * @param int compassSetting - the compass setting
    */
   private int compassSetting;

   /**
    * @param final int RADIUS - set to 20
    */
   private final int RADIUS = 20;

   /**
    * @param final int OFFSET - set to 90
    */
   private final int OFFSET = 90;

   /**
    * @param final int START_POSITION - set to 10
    */
   private final int START_POSITION = 10;

   /**
    * @param final double LINE-WIDTH - set to 1.0
    */
   private final double LINE_WIDTH = 1.0;

  /**
   * Compass constructor
   * @param degree is the current entity heading in degrees
   * @param idNum is the entities ID Number
   */

   public Compass ( int degree, short idNum )
   {

      compassSetting = OFFSET - degree;

      if ( idNum < 30 )
      {
         setBackground ( Color.red );
      }  //  end if
      else
      {
         setBackground ( Color.blue );
      }  //  end else

      JLabel northLabel = new JLabel ();
     // northLabel.setText ( "N" );
     // northLabel.setForeground ( Color.yellow );
    //  northLabel.setBounds(new Rectangle( 28, 5, 5, 5));
      setPreferredSize ( new Dimension ( 60, 60 ));

   }  //  end argumented constructor


   /**
   * paintComponent paints the panel holding the compass
   * @param Graphics g is the graphics context
   * @return void
   */

   public void paintComponent ( Graphics g )
   {

      super.paintComponent ( g );
      Graphics2D g2 = ( Graphics2D ) g;
      int diameter = 2 * RADIUS;
      g.setColor ( Color.yellow );
      g.drawOval ( START_POSITION, START_POSITION, diameter, diameter );
      g.fillOval ( START_POSITION, START_POSITION, diameter, diameter );
      g2.drawString ( "N", 26, 9 );

      g.setColor ( Color.black );
      Arc2D arrow = new Arc2D.Double (( double ) START_POSITION, ( double ) START_POSITION,
                                      ( double ) diameter, ( double ) diameter,
                                      ( double ) compassSetting, LINE_WIDTH, Arc2D.PIE );
      g2.draw ( arrow );
      g2.fill ( arrow );
   }  //  end paintComponent

  /**
   * setCompassSetting sets the new direction as a compass position
   * @param int newSetting is a new heading angle in degrees
   * @return void
   */
   public void setCompassSetting ( int newSetting )  {
      compassSetting = OFFSET - newSetting;
   }  //  end setCompassSetting

}  //  end Compass