TileFrame.java

// This class is the top-level frame for a set of colored tiles.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class TileFrame extends JFrame {
    private TilePanel panel;

    public TileFrame() {
        setSize(400, 400);
        setTitle("Fun with Tiles");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        panel = new TilePanel(Color.RED);
        add(panel, BorderLayout.CENTER);
        addColorButtons();
    }
        
    private void addColorButtons() {
        JPanel p = new JPanel();
        p.setBackground(Color.CYAN);
        ButtonGroup g = new ButtonGroup();
        addButton(p, g, "Green", false, Color.GREEN);
        addButton(p, g, "Blue", false, Color.BLUE);
        addButton(p, g, "Red", true, Color.RED);
        add(p, BorderLayout.NORTH);
    }
        
    private void addButton(JPanel p, ButtonGroup g, String name,
                           boolean selected, final Color color) {
        JRadioButton button = new JRadioButton(name, selected);
        p.add(button);
        g.add(button);
        button.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                if (e.getStateChange() == ItemEvent.SELECTED) {
                    panel.setColor(color);
                }
            }
        });
    }
}