import java.awt.*;
import java.applet.*;
import java.awt.event.*; // 1.1

public class RadioState extends Applet
                        implements ActionListener
{
  CheckboxGroup cbg = new CheckboxGroup();

  Checkbox good = new Checkbox("Good", false, cbg);
  Checkbox better = new Checkbox("Better", false, cbg);
  Checkbox best = new Checkbox("Best", true, cbg);

  Button paintIt = new Button("Paint It");

  public void init()
  {
    setLayout(new BorderLayout());
    add("North", makeButtons());
    add("South", paintIt);
    paintIt.addActionListener(this);
  }

  public void actionPerformed(ActionEvent ae)
  {
    Graphics g = getGraphics();

    int w = getSize().width;
    int h = getSize().height;
    int ratio = 1;

    Checkbox current = cbg.getSelectedCheckbox();
    if      (current == good)   ratio = 5;
    else if (current == better) ratio = 3;
    else if (current == best)   ratio = 2;

    g.clearRect(0, 0, w, h);
    g.fillOval(w/2 - ((w/ratio)/2), h/2 - ((h/ratio)/2),
               w/ratio, h/ratio);

    g.dispose();
  }

  public Panel makeButtons()
  {
    Panel p = new Panel();
    p.setLayout(new GridLayout(1, 0, 5, 5));
    p.add(good);
    p.add(better);
    p.add(best);

    Panel p2 = new Panel();
    p2.add(p);
    return p2;
  }
}