/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.gui;import com.davidflanagan.examples.reflect.*;import javax.swing.*;import java.awt.event.*;public class CommandAction extends AbstractAction {    Command command;  // The command to execute in response to an ActionEvent        /**     * Create an Action object that has the various specified attributes,      * and invokes the specified Command object in response to ActionEvents     **/    public CommandAction(Command command, String label,			 Icon icon, String tooltip, 			 KeyStroke accelerator, int mnemonic,			 boolean enabled)     {	this.command = command;  // Remember the command to invoke		// Set the various action attributes with putValue()	if (label != null) putValue(NAME, label);	if (icon != null) putValue(SMALL_ICON, icon);	if (tooltip != null) putValue(SHORT_DESCRIPTION, tooltip);	if (accelerator != null) putValue(ACCELERATOR_KEY, accelerator);	if (mnemonic != KeyEvent.VK_UNDEFINED) 	    putValue(MNEMONIC_KEY, new Integer(mnemonic));	// Tell the action whether it is currently enabled or not	setEnabled(enabled);    }        /**     * This method implements ActionListener, which is a super-interface of     * Action.  When a component generates an ActionEvent, it is passed to     * this method.  This method simply passes it on to the Command object     * which is also an ActionListener object     **/    public void actionPerformed(ActionEvent e) { command.actionPerformed(e); }    // These constants are defined by Action in Java 1.3.    // For compatibility with Java 1.2, we re-define them here.    public static final String ACCELERATOR_KEY = "AcceleratorKey";    public static final String MNEMONIC_KEY = "MnemonicKey";}