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

/**
   The ToppingPanel class allows the user to select
   the toppings for the bagel.
*/

public class ToppingPanel extends JPanel
{
   // The following constants are used to indicate
   // the cost of toppings.
   public final double CREAM_CHEESE = 0.50;
   public final double BUTTER = 0.25;
   public final double PEACH_JELLY = 0.75;
   public final double BLUEBERRY_JAM = 0.75;

   private JCheckBox creamCheese;  // To select cream cheese
   private JCheckBox butter;       // To select butter
   private JCheckBox peachJelly;   // To select peach jelly
   private JCheckBox blueberryJam; // To select blueberry jam

   /**
      Constructor
   */

   public ToppingPanel()
   {
      // Create a GridLayout manager with 
      // four rows and one column.
      setLayout(new GridLayout(4, 1));

      // Create the check boxes.
      creamCheese = new JCheckBox("Cream cheese");
      butter = new JCheckBox("Butter");
      peachJelly = new JCheckBox("Peach jelly");
      blueberryJam = new JCheckBox("Blueberry jam");

      // Add a border around the panel.
      setBorder(BorderFactory.createTitledBorder("Toppings"));

      // Add the check boxes to the panel.
      add(creamCheese);
      add(butter);
      add(peachJelly);
      add(blueberryJam);
   }

   /**
      getToppingCost method
      @return The cost of the selected toppings.
   */

   public double getToppingCost()
   {
      double toppingCost = 0.0;

      if (creamCheese.isSelected())
         toppingCost += CREAM_CHEESE;
      if (butter.isSelected())
         toppingCost += BUTTER;
      if (peachJelly.isSelected())
         toppingCost += PEACH_JELLY;
      if (blueberryJam.isSelected())
         toppingCost += BLUEBERRY_JAM;

      return toppingCost;
   }
}