MenuShortcuts.java Source code

Introduction

Here is the source code for MenuShortcuts.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.Container;
import java.awt.Event;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;

/**
 * Demonstrate JMenu shortcuts and accelerators.
 * 
 * @author Ian Darwin, http://www.darwinsys.com/
 * @version $Id: MenuShortcuts.java,v 1.4 2004/02/09 03:33:50 ian Exp $
 */
public class MenuShortcuts extends JFrame implements ActionListener {
    /** The menubar */
    JMenuBar mb;

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

    /** Options Sub-JMenu */
    JMenu opSubm;

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

    // Constructor
    MenuShortcuts(String s) {
        super("JMenuShortcuts: " + s);
        mb = new JMenuBar();
        setJMenuBar(mb); // Frame implements JMenuContainer

        Container cp = getContentPane();
        JMenuItem mi;
        // The File JMenu...
        fm = new JMenu("File");
        fm.setMnemonic('F');
        fm.add(mi = new JMenuItem("Open", 'O'));
        mi.addActionListener(this);
        fm.add(mi = new JMenuItem("Close", 'W'));
        mi.addActionListener(this);
        fm.addSeparator();

        fm.add(mi = new JMenuItem("Print", 'P'));
        mi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R, Event.ALT_MASK));

        mi.addActionListener(this);
        fm.addSeparator();
        fm.add(mi = new JMenuItem("Exit", 'Q'));
        exitItem = mi; // save for action handler
        mi.addActionListener(this);
        mb.add(fm);

        // The Options JMenu...
        om = new JMenu("Options");
        om.add(new JMenuItem("Alpha"));
        om.add(new JMenuItem("Gamma"));
        om.add(new JMenuItem("Delta"));
        mb.add(om);

        // The Help JMenu...
        hm = new JMenu("Help");
        hm.add(mi = new JMenuItem("About"));
        mi.addActionListener(this);
        hm.add(mi = new JMenuItem("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);
    }

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