AnotherMenuDemo.java Source code

Introduction

Here is the source code for AnotherMenuDemo.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.awt.CheckboxMenuItem;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.MenuShortcut;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

/**
 * Demonstrate Menus and the MenuBar class/MenuContainer interface
 * 
 * This version uses 1.1 action handling and MenuShortcut. The action handling
 * is incomplete; realistically, each MenuItem would have its own, task-specific
 * ActionListener; this would handle the MenuShortcuts and the CheckboxMenuItems
 * correctly.
 * 
 * @author Ian Darwin
 */
public class AnotherMenuDemo extends Frame implements ActionListener, ItemListener {
    MenuBar mb;

    /** File, Options, Help */
    Menu fm, om, hm;

    /** Options Sub-Menu */
    Menu opSubm;

    /** The MenuItem for exiting. */
    MenuItem exitItem;

    /** An option that can be on or off. */
    CheckboxMenuItem cb;

    // Constructor
    AnotherMenuDemo(String s) {
        super("MenuDemo: " + s);

        Container cp = this;
        cp.setLayout(new FlowLayout());

        mb = new MenuBar();
        setMenuBar(mb); // Frame implements MenuContainer

        MenuItem mi;
        // The File Menu...
        fm = new Menu("File");
        fm.add(mi = new MenuItem("Open", new MenuShortcut('O')));
        mi.addActionListener(this);
        fm.add(mi = new MenuItem("Close", new MenuShortcut('W')));
        mi.addActionListener(this);
        fm.addSeparator();
        fm.add(mi = new MenuItem("Print", new MenuShortcut('P')));
        mi.addActionListener(this);
        fm.addSeparator();
        fm.add(mi = new MenuItem("Exit", new MenuShortcut('Q')));
        exitItem = mi; // save for action handler
        mi.addActionListener(this);
        mb.add(fm);

        // The Options Menu...
        om = new Menu("Options");
        cb = new CheckboxMenuItem("AutoSave");
        cb.setState(true);
        cb.addItemListener(this);
        om.add(cb);
        opSubm = new Menu("SubOptions");
        opSubm.add(new MenuItem("Alpha"));
        opSubm.add(new MenuItem("Gamma"));
        opSubm.add(new MenuItem("Delta"));
        om.add(opSubm);
        mb.add(om);

        // The Help Menu...
        hm = new Menu("Help");
        hm.add(mi = new MenuItem("About"));
        mi.addActionListener(this);
        hm.add(mi = new MenuItem("Topics"));
        mi.addActionListener(this);
        mb.add(hm);
        mb.setHelpMenu(hm); // needed for portability (Motif, etc.).

        // the main window
        cp.add(new Label("Menu Demo Window", 200, 150));
        pack();
    }

    /** Handle action events. */
    public void actionPerformed(ActionEvent evt) {
        // System.out.println("Event " + evt);
        String cmd;
        if ((cmd = evt.getActionCommand()) == null)
            System.out.println("You chose a menu shortcut");
        else
            System.out.println("You chose " + cmd);
        Object cmp = evt.getSource();
        // System.out.println("Source " + cmp);
        if (cmp == exitItem)
            System.exit(0);
    }

    /** The CheckBoxMenuItems send a different message */
    public void itemStateChanged(ItemEvent e) {
        System.out.println("AutoSave is set " + cb.getState());
    }

    public static void main(String[] arg) {
        new MenuDemo("Testing 1 2 3...").setVisible(true);
    }
}