/**
 * PopItModel-klassen
 */
public class PopItModel
{
    public static final int RADER = 6;
    public static final int KOLONNER = 6;

    private boolean[][] radene = new boolean[RADER][KOLONNER];

    public boolean hentTrykket(int rad, int kolonne)
    { return radene[rad][kolonne]; }

    public void toggle(int rad, int kolonne)
    { radene[rad][kolonne] = !radene[rad][kolonne]; }
}


/**
 * PopItView-klassen
 */
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class PopItView
{
    private PopItController controller;

    private int rader;
    private int kolonner;

    private JFrame vindu;
    private JPanel panel;
    private JButton[][] knappene;

    public PopItView(PopItController controller, int rader, int kolonner)
    {
        this.controller = controller;

        this.rader = rader;
        this.kolonner = kolonner;

        try
        { UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); }
        catch (Exception e)
        { System.exit(-1); }

        opprettVindu();
        opprettPanel();
        opprettKnapper();
    }

    private void opprettVindu()
    {
        vindu = new JFrame("Pop It");
        vindu.setSize(600, 600);
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void opprettPanel()
    {
        panel = new JPanel();
        panel.setLayout(new GridLayout(rader, kolonner));
        vindu.add(panel, BorderLayout.CENTER);
    }

    private class Knappetrykk implements ActionListener
    {
        private int rad;
        private int kolonne;

        public Knappetrykk(int rad, int kolonne)
        {
            this.rad = rad;
            this.kolonne = kolonne;
        }

        @Override
        public void actionPerformed(ActionEvent e)
        { controller.oppdaterKnapp(rad, kolonne); }
    }

    private void opprettKnapper()
    {
        knappene = new JButton[rader][kolonner];
        
        for (int rad = 0; rad < rader; rad ++)
        {
            for (int kolonne = 0; kolonne < kolonner; kolonne ++)
            {
                JButton knapp = new JButton();
                knapp.setBackground(Color.WHITE);
                knapp.addActionListener(new Knappetrykk(rad, kolonne));
                panel.add(knapp);

                knappene[rad][kolonne] = knapp;
            }
        }
    }

    public void endreFarge(int rad, int kolonne, boolean trykket)
    {
        if (trykket)
        { knappene[rad][kolonne].setBackground(Color.BLACK); }
        else
        { knappene[rad][kolonne].setBackground(Color.WHITE); }
    }

    public void vis()
    { vindu.setVisible(true); }
}


/**
 * PopItController-klassen
 */
public class PopItController
{
    private PopItModel model;
    private PopItView view;

    public PopItController()
    {
        model = new PopItModel();
        view = new PopItView(this, PopItModel.RADER, PopItModel.KOLONNER);

        view.vis();
    }

    public void oppdaterKnapp(int rad, int kolonne)
    {
        model.toggle(rad, kolonne);
        boolean trykket = model.hentTrykket(rad, kolonne);
        view.endreFarge(rad, kolonne, trykket);
    }
}


/**
 * Hovedprogrammet
 */
public class Hoved
{
    public static void main(String[] args)
    { new PopItController(); }
}