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


/*
  
  8-Queens Applet, By Aaron Davidson <http://spaz.ca/>
  
  This code is released in the public domain. The author
  would appreciate it if any derivatives or distributions
  retain this comment & credit.
  
 */


public class QueensApplet extends Applet implements ActionListener {
	Button 	solve = new Button("Solve");
	Button 	clear = new Button("Clear");
	Board	b = new Board();

	public void init() {
		setLayout(new BorderLayout());
		add("Center", b);

		Panel bPanel = new Panel();
		add("South", bPanel);
		bPanel.setLayout(new GridLayout(1,5));
	
		bPanel.add(new Label(" "));
		bPanel.add(clear);
		bPanel.add(new Label(" "));
		bPanel.add(solve);
		bPanel.add(new Label(" "));

		
		clear.addActionListener(this);
		solve.addActionListener(this);
	}
	
	public void actionPerformed(ActionEvent e) {
        if (e.getSource() == clear) { 
			b.initBoard();
			b.paint(b.getGraphics());
		} else if (e.getSource() == solve) { 
			b.initBoard();
			b.paint(b.getGraphics());
			b.solve(0);
		}
	}
}