/*
<applet code=FlipAp.class height=200 width=300>
</applet>
*/

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

public class Flip extends Applet {

    static final int size = 6;  
    static final int cellSize = 65; 
    
    boolean[] state;
    Component[] indicators;

    public void init() {

        setLayout (new BorderLayout());
        state = new boolean[size*size];
   
        Panel controlPanel = new Panel();
        controlPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
        controlPanel.add(new Button("Randomize"));
        add("North", controlPanel);

        Panel mainPanel = new Panel();
        mainPanel.setLayout(new GridLayout(size, size));
        for (int i = 0; i < size*size; i++) 
            mainPanel.add(new Button("" + i));
        add("Center", mainPanel);
  }
   
  /** The flip method takes care of flipping one of the "keys" on the
   * board -- such as the one clicked-on or one of its neighbors. This
   * procedure is responsible both for updating the object's record of which
   * state the key is in and also for actually recoloring the displayed key
   * (using the recolor method). */

  protected void flip(int key)
  {
    state[key] = !state[key];
    recolor(key);
  }

  /** The recolor method updates the displayed color of one of the keys
   * on the board to reflect the current flippedness state of that key. */

  protected void recolor(int n)
  {
    indicators[n].setBackground(state[n] ? Color.red : Color.green);
  }
   
  /** The randomize method independently chooses whether to flip each key
   * with a 50/50 chance for each.  Note that for some board sizes this
   * kind of randomization might lead to board configurations that can
   * not be solved (to a single-color state) by any combination of
   * mouse clicks. If such sizes are to be used, it would be better to
   * have the randomize procedure act like the user interface does, flipping
   * a key and its neighbors rather than just the one key. */

  protected void randomize()
  {
    for(int i = 0; i < size*size; i++){
      if(Math.random() > .5){
        flip(i);
      }
    }
  }

  public static void main(String[] args)
  {
    new Flip();
  }


}