/**********************************************************************
* Created by: Eric Gilbert
* Date: 1/24/99
* Designed to mimic the game Deluxe Lights Out(r) by Tiger Electronics
**********************************************************************/

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;

public class FourByFour extends Applet implements ActionListener {
  int width = 4, height = 4;
  Button[][] lights = new Button[width][height];
  Color mostlyRed = new Color(255, 50, 50);
  Color veryDarkGray = Color.gray;
  public void init() {
    setLayout(new GridLayout(width, height)); // Make the screen a grid
    double choice;
    Random generator = new Random();
    for(int i = 0; i < width; i++)
      for(int j = 0; j < height; j++) {
	choice = generator.nextDouble();
        lights[i][j] = new Button("");
	lights[i][j].setBackground(choice < 0.5 ? veryDarkGray : mostlyRed);
        add(lights[i][j]);
        lights[i][j].addActionListener(this);
      }
  }
  public void changeColor(Button toChange) {
    if (toChange.getBackground() == mostlyRed)
      toChange.setBackground(veryDarkGray);
    else
      toChange.setBackground(mostlyRed);
  }
  public void actionPerformed(ActionEvent e) {
    int row = 0, column = 0;
    for(int i = 0; i < width; i++)
      for(int j = 0; j < height; j++)
        if (lights[i][j] == e.getSource()) {
          row = i;
          column = j;
        }
    changeColor(lights[row][column]);
    changeColor(lights[row][(column - 1 + width)%width]);
    changeColor(lights[(row + 1)%height][column]);
    changeColor(lights[row][(column + 1)%width]);
    changeColor(lights[(row - 1 + height)%height][column]);
  }
}