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package testquakea;

import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.Timer;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.*;
import java.util.*;

/**
 *
 * @author Student
 */
public class Testquakea {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Okno a1 = new Okno("Quake", 200, 200, 800, 600);
    }
}
//----------------------------------
class Okno extends JFrame {
    private Container tlo;
    private JButton start;
    private JButton stop;
    private JButton koniec;
    private MojPanel cent;
    private Timer t;

    public Okno(String atyt, int ax0, int ay0, int aszer, int awys) {
        super(atyt);
        setBounds(ax0, ay0, aszer, awys);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        tlo = getContentPane();
        budujUI();
        setVisible(true);
    }
    private void budujUI() {
        tlo.setLayout(new BorderLayout());
        JPanel gorny = new JPanel();

        gorny.setBackground(Color.RED);
        gorny.setLayout(new FlowLayout(FlowLayout.CENTER));
        cent = new MojPanel();
        cent.setLayout(new FlowLayout(FlowLayout.CENTER));

        tlo.add(BorderLayout.NORTH, gorny);
        tlo.add(cent);

        koniec = new JButton("Koniec");
        start = new JButton("Start");
        stop = new JButton("Stop");
        koniec.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                t.stop();
                dispose();
            }
        });

        start.addActionListener(new ActionListener()
        {
          @Override
        public void actionPerformed(ActionEvent ae) {
            t.start();
        }
        });

        stop.addActionListener(new ActionListener()
        {
        @Override
        public void actionPerformed(ActionEvent ae) {
            t.stop();
        }
        });




        gorny.add(koniec);
        gorny.add(start);
        gorny.add(stop);



        t = new Timer(10, new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                cent.poruszkulki();
            }
        });
    }
}
//------------------------------------------------------------------------------
class MojPanel extends JPanel {
     ArrayList<Kulka> lista1=new ArrayList<>();


    public MojPanel() {
        super();
        setBackground(Color.BLACK);
        Random r = new Random();

       for(int i=0;i<50;i++)
       {
          lista1.add( new Kulka( new Color( r.nextInt(256), r.nextInt(256), r.nextInt(256)),
                                 100, 100, r.nextInt(30),
                                 r.nextInt(11) - 5, r.nextInt(11) - 5));
       }
    }
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        for(Kulka x:lista1)
            x.rysuj(g);

       /*kulka1.rysuj(g);
        kulka2.rysuj(g);
        kulka3.rysuj(g);
        kulka4.rysuj(g);*/
    }

    public void poruszkulki() {
        for(Kulka x:lista1)
        {
            x.porusz(getWidth(),getHeight());
        }
        repaint();
        /*kulka1.porusz(getWidth(),getHeight());
        kulka2.porusz(getWidth(),getHeight());
        kulka3.porusz(getWidth(),getHeight());
        kulka4.porusz(getWidth(),getHeight());
        repaint();*/

    }
 }
//------------------------------------------------------------------------------
class Kulka {
    private int x, y, r, vx, vy;
    Color a, b;

    public Kulka(Color aa, int ax, int ay, int ar, int avx, int avy) {
        a = aa;
        x=ax;
        y=ay;
        r=ar;
        vx=avx;
        vy=avy;
    }


    public void rysuj(Graphics g) {
        g.setColor(a);
        g.fillOval(x-r, y-r, 2*r, 2*r);
    }

    public void porusz(int szer, int wys) {
        if(x >= szer-r || x <= r) {
            vx=-vx;
        }
        if(y >= wys-r || y <= r) {
            vy=-vy;
        }
        x+=vx;
        y+=vy;
    }
}