Example of Mac OS Application Adapter

package com.darwinsys;
 
/*
 * 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 javax.swing.JFrame;
 
/**
 * The only os-dependant part of com.darwinsys, this is the adapter class to handle MacOS's
 * "different" way of doing About Box, Quit item in App menu, Preferences, and so on.
 */
public class MacOSAppAdapter extends Application {
    ApplicationListener appListener;
    JFrame parent;
    AboutBoxHandler abouter;
    PrefsHandler prefser;
    PrintHandler printer;
    ShutdownHandler shutter;
 
    /**
     * Construct a MacOSAppAdapter.
     * 
     * @param theParent
     *            A JFrame, usually the main application window.
     * @param about
     *            A handler for the About box.
     * @param prefs
     *            A Preferences handler.
     * @param print
     *            A Print handler (bug: does not get invoked now).
     * @param shut
     *            A shutdown handler
     */
    public MacOSAppAdapter(JFrame theParent, AboutBoxHandler about, PrefsHandler prefs, PrintHandler print, ShutdownHandler shut) {
	appListener = new MyAppEventHandler();
	parent = theParent;
 
	if (about != null) {
	    abouter = about;
	    setEnabledAboutMenu(true);
	    addAboutMenuItem();
	}
 
	if (prefs != null) {
	    prefser = prefs;
	    setEnabledPreferencesMenu(true);
	    addPreferencesMenuItem();
	}
 
	printer = print;
 
	shutter = shut;
    }
 
    /**
     * Method to register this handler with Apple's event manager, calling addApplicationListener in
     * parent class.
     */
    public void register() {
	addApplicationListener(appListener);
    }
 
    /** Inner class to provide ApplicationListener support. */
    class MyAppEventHandler implements ApplicationListener {
 
	/** This is called when the user does Application->About */
	public void handleAbout(ApplicationEvent event) {
	    abouter.showAboutBox(parent);
	    event.setHandled(true);
	}
 
	/** Called when the user does Application->Preferences */
	public void handlePreferences(ApplicationEvent event) {
	    if (prefser != null)
		prefser.showPrefsDialog(parent);
	    event.setHandled(true);
	}
 
	public void handlePrint(ApplicationEvent event) {
	    if (printer != null)
		printer.doPrint(parent);
	    event.setHandled(true);
	}
 
	/** This is called when the user does Application->Quit */
	public void handleQuit(ApplicationEvent event) {
	    if (shutter != null)
		shutter.shutdown(parent);
	    System.exit(0); // should be notreached
	}
 
	/**
	 * @see com.apple.eawt.ApplicationListener#handleOpenApplication(com.apple.eawt.ApplicationEvent)
	 */
	public void handleOpenApplication(ApplicationEvent arg0) {
	    // TODO Auto-generated method stub
 
	}
 
	/**
	 * @see com.apple.eawt.ApplicationListener#handleOpenFile(com.apple.eawt.ApplicationEvent)
	 */
	public void handleOpenFile(ApplicationEvent arg0) {
	    // TODO Auto-generated method stub
 
	}
 
	/**
	 * @see com.apple.eawt.ApplicationListener#handlePrintFile(com.apple.eawt.ApplicationEvent)
	 */
	public void handlePrintFile(ApplicationEvent arg0) {
	    // TODO Auto-generated method stub
 
	}
 
	/**
	 * @see com.apple.eawt.ApplicationListener#handleReOpenApplication(com.apple.eawt.ApplicationEvent)
	 */
	public void handleReOpenApplication(ApplicationEvent arg0) {
	    // TODO Auto-generated method stub
 
	}
    }
}