// **********************************************************************// // <copyright>// //  BBN Technologies//  10 Moulton Street//  Cambridge, MA 02138//  (617) 873-8000// //  Copyright (C) BBNT Solutions LLC. All rights reserved.// // </copyright>// **********************************************************************// // $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/gui/menu/WebSiteHelpMenuItem.java,v $// $RCSfile: WebSiteHelpMenuItem.java,v $// $Revision: 1.2.2.1 $// $Date: 2004/10/14 18:26:56 $// $Author: dietrick $// // **********************************************************************package com.bbn.openmap.gui.menu;import javax.swing.*;import java.awt.event.*;import com.bbn.openmap.Environment;import com.bbn.openmap.InformationDelegator;import com.bbn.openmap.LightMapHandlerChild;/** * This object tells a browser to bring up the OpenMap Website help. */public class WebSiteHelpMenuItem extends JMenuItem implements ActionListener,        LightMapHandlerChild {    protected InformationDelegator informationDelegator = null;    public WebSiteHelpMenuItem() {        super("OpenMap WebSite Help");        setMnemonic('h');        addActionListener(this);        setEnabled(false); // enabled when InformationDelegator found.    }    /**     * @param in_informationDelegator     */    public void setInformationDelegator(                                        InformationDelegator in_informationDelegator) {        informationDelegator = in_informationDelegator;        setEnabled(informationDelegator != null);    }    /**     * Return current value of InformationDelegator.     */    protected InformationDelegator getInformationDelegator() {        return informationDelegator;    }    public void actionPerformed(ActionEvent ae) {        if (informationDelegator != null) {            informationDelegator.displayURL(Environment.get(Environment.HelpURL,                    "http://openmap.bbn.com/doc/user-guide.html"));        }    }    public void findAndInit(Object someObj) {        if (someObj instanceof InformationDelegator) {            setInformationDelegator((InformationDelegator) someObj);        }    }    public void findAndUndo(Object someObj) {        if (someObj instanceof InformationDelegator                && getInformationDelegator() == (InformationDelegator) someObj) {            setInformationDelegator(null);        }    }}