import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.InterruptedException;
import java.awt.geom.Line2D.Float;
/**
 * A GUI object which illustrates the simulation. 
 * All SimulationDisplay objects must have the method init() used, after they have been pack()ed into their parent object, but before the are made visible.
 * 
 * @author James M. Clarke
 * @version 12/03/2007
 */

    public class SimulationDisplay extends JPanel
    {
        private Image myImage;
        private Graphics2D graphic;       
        private Simulation r;
        private Dimension size;
        
        /**
         * Constructor for SimulationDisplay objects
         * @param  in the simulation which should be displayed
         */   
        public SimulationDisplay(Simulation in)
        {
               super();
               r = in;
               this.setPreferredSize(new Dimension(500, 500));
        }
        
        /**
         * Initialize an object that has already been pack()ed into a parent object
         */         
        public void init()
        {               
               size = this.getSize();
               myImage = this.createImage(size.width, size.height);
               graphic = (Graphics2D)myImage.getGraphics();
       }

        /**
         * Draws the simulation. Runways and aircraft are drawn, and the display is refreshed.
         * @param  g the Graphics object to draw to
         * @see JPanel#paint
         */        
        public void paint(Graphics g)
        {
            // Clear the screen to be all white
            graphic.setColor(Color.black);
            graphic.fillRect(0, 0, 500, 500);     
            graphic.setColor(Color.green);
            graphic.draw( new java.awt.geom.Ellipse2D.Float(0, 0, 499, 499)  ); 
            graphic.draw( new java.awt.geom.Line2D.Float(10, 490, 35, 490)  ); 
            graphic.draw( new java.awt.geom.Line2D.Float(35, 487, 35, 490)  );
            graphic.draw( new java.awt.geom.Line2D.Float(10, 487, 10, 490)  );
            graphic.drawString("4 miles", 10, 480); 
            graphic.setColor(Color.green);
            // Draw on the runways
            for (Runway b : ((Simulation) r).getRunways())
                {
                    b.draw(graphic);   
                }
            
            // Draw on the aircraft
            for (Aircraft b : ((Simulation) r).getAircraft())
                {
                    b.draw(graphic);   
                }
            
            // Draw this all onto the graphics we have been given
            g.drawImage(myImage, 0, 0, null);        
        }
    }