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


public class ColorButtonPanel extends JPanel {

   public ColorButtonPanel() {
      setBackground(Color.BLACK);
      makeButton("Yellow", Color.YELLOW);
      makeButton("Blue", Color.BLUE);
      makeButton("Green", Color.GREEN);
   }

   private void makeButton(String name, Color background) {
      JButton button = new JButton(name);
      add(button);
      button.addActionListener(new ColorAction(background));
   }

   /* This private inner class is not visible outside ColorButtonPanel */
   private class ColorAction implements ActionListener {
       private Color backgroundColor;

       public ColorAction (Color backgroundColor) {
           this.backgroundColor = backgroundColor;
       }

       public void actionPerformed(ActionEvent event) {
          setBackground(backgroundColor);
          repaint();
       }
   }
}