package caltool.view.help;

import caltool.model.help.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import mvp.*;

/****
 *
 * Class HelpMenu is the pulldown menu view of the <a href = "Help.html"
 * Help </a> model class.  The HelpMenu widget is a Java JMenu.  Anonymous
 * instances of JMenuItem are defined for each item in the menu.
 *
 */
public class HelpMenu extends mvp.View {

    /**
     * Construct this with the give Help model.
     */
    public HelpMenu(Screen screen, Help help, HelpUI helpUI) {
        super(screen, help);
    }

    /**
     * Compose this by inserting each of its three menu items into the pulldown
     * menu.  The items are About, Show Quick Help, and Detailed Help.
     */
    public Component compose() {

        /*
         * Make the widget of this the JMenu.
         */
        widget = new JMenu("Help");

        /*
         * Create a constant reference to the Help model for use in the
         * menu item action listeners.  This is necessary due to the subtle
         * rules of anonymous inner classes in Java.
         */
        final Help help = (Help) model;

        /*
         * Create the menu items using the following pattern:
         *                                                              <pre>
         *     JMenu.add(new JMenuItem("<em>Item name</em>").addActionListener(
         *         new ActionListener() {
         *             public void actionPerformed(ActionEvent e) {
         *                 <em>Model.method()</em>
         *                                                              </pre>
         */


        /*
         * Add the 'About ...' menu item.
         */
        ((JMenu) widget).add(new JMenuItem("About ...")).addActionListener(
            new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.out.println("In Help.about.");
                }
            }
        );

        /*
         * add the 'Show Quick Help' menu item.););
         */
        ((JMenu) widget).add(new JMenuItem("Show Quick Help")).addActionListener(
            new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.out.println("In Help.showQuickHelp.");
                }
            }
        );

        /*
         * add the 'Detailed Help ...' menu item.););
         */
        ((JMenu) widget).add(new JMenuItem("Detailed Help ...")).addActionListener(
            new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.out.println("In Help.detailedHelp.");
                }
            }
        );

        return widget;
    }

}