/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * SpelApplet.java
 *
 * Created on 2009-feb-17, 09:27:49
 */

package mittforstaspel;

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.logging.Level;
import java.util.logging.Logger;



/**
 *
 * @author karlssoj
 */
public class SpelApplet extends Applet implements Runnable, MouseListener
{
    Boll b[];
    //GLOBALA VARIABLER, SÄTT IN I BÖRJAN AV APPLET-KLASSEN
	Image dbImage;	//deklarerar en Image variabel dit en osynlig kopia av applet-grafiken sparas
	Graphics dbg;	//deklarerar Graphics variabel dit alla grafik-egenskaper för appleten sparas



    /** Initializes the applet appletKlass */
    @Override
    public void init()
    {
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable()
            {
                public void run() {
                    //initComponents();
                }
            });
        } catch (Exception ex) {
            ex.printStackTrace();
        }

       setBackground(Color.CYAN);
      
       ExecutorService tradgrupp = Executors.newFixedThreadPool(20);

       b = new Boll[20];

       for(int i = 0; i < 10; i++)
       {
            b[i] = new Boll(tradgrupp, this);
       }

       tradgrupp.submit(this);
       addMouseListener(this);
    }

	//Denna metod anropas av repaint(
    @Override
	public void update (Graphics g)
	{
		//Initialiserar den osynliga kopian av grafiken
		if (dbImage == null)
		{
			//skapar en tom "image" med samma storlek som innevarande applet
			dbImage = createImage(this.getSize().width, this.getSize().height);
			//hämtar grafikegenskaper
			dbg = dbImage.getGraphics();
		}

		//Tömmer skärmen i bakgrunden
		dbg.setColor (getBackground());
		dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);

		//Ritar grafiken pånytt i bakgrunden
		dbg.setColor(getForeground());
		paint(dbg);

		//Ritar den uppdaterade bilden på bildskärmen
		g.drawImage(dbImage, 0, 0, this);
	}


    @Override
    public void paint(Graphics grafik)
    {
        //grafikfunktioner hit
        for(int i = 0; i < Boll.antal; i++)
        {
            if(b[i].stat.isCancelled() == false)
            {
                grafik.setColor(b[i].farg);
                grafik.fillOval(b[i].x, b[i].y, b[i].diameter, b[i].diameter);
            }
        }
    }

    public void run()
    {
       while(true)
       {
            try
            {
                repaint();
                Thread.sleep(Boll.vanteTid);
            }
            catch (InterruptedException ex)
            {
                //Logger.getLogger(SpelApplet.class.getName()).log(Level.SEVERE, null, ex);
            }
       }
    }

    public int skillnad(int a, int b)
    {
        if(a > b) return a-b;
        else if(a < b) return b-a;
        else return a;
    }

    public void mouseClicked(MouseEvent e)
    {

    }

    public void mousePressed(MouseEvent e)
    {
        for(int i = 0; i < Boll.antal; i++)
        {
            if( (e.getPoint().x - b[i].x) <= b[i].diameter && (e.getPoint().y - b[i].y) <= b[i].diameter)
            {
                if( (e.getPoint().x - b[i].x) >= 0 && (e.getPoint().y - b[i].y) >= 0)
                {
                       b[i].stat.cancel(true);
                }
            }
        }
    }

    public void mouseReleased(MouseEvent e)
    {

    }

    public void mouseEntered(MouseEvent e)
    {

    }

    public void mouseExited(MouseEvent e)
    {

    }


    /** This method is called from within the init() method to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    /*
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>
*/

    // Variables declaration - do not modify
    // End of variables declaration

}
class Boll implements Runnable
{
    int x, y, diameter, xrikt, yrikt;
    static int vanteTid, antal = 0;
    Future stat;
    Color farg;
    Applet applet;
    Random generator = new Random();

    public Boll(ExecutorService tr, Applet a)
    {
        antal++;
        xrikt = generator.nextInt(8) - 4;
        yrikt = generator.nextInt(8) - 4;
        applet = a;
        vanteTid = 10;
        diameter = 50;

        x = generator.nextInt(a.getWidth() - diameter);
        y = generator.nextInt(a.getWidth() - diameter);
       
        farg = new Color(generator.nextInt(256),generator.nextInt(256),generator.nextInt(256));
        stat = tr.submit(this);
    }

    public void move()
    {
        if(x >= applet.getWidth() - diameter || x < 0) xrikt*=-1;
        if(y >= applet.getHeight() - diameter || y < 0) yrikt*=-1;

        x+=xrikt;
        y+=yrikt;
    }

    public void run()
    {
        while(true)
        {
            move();
            try 
            {
                Thread.sleep(vanteTid);
            }
            catch (InterruptedException ex)
            {
                //Logger.getLogger(Boll.class.getName()).log(Level.SEVERE, null, ex);
                break;
            }

        }
    }
}