webpad.java

编写程序

/*
 * @(#)WebPad.java	1.5 03/12/19
 * 
 * Copyright (c) 2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * 
 * -Redistribution 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.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST 
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, 
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY 
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, 
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

import java.awt.*;
import java.awt.event.*;

import java.util.Enumeration;
import java.util.Vector;

import javax.swing.*;

import javax.jnlp.BasicService;
import javax.jnlp.ServiceManager;
import javax.jnlp.PersistenceService;
import javax.jnlp.UnavailableServiceException;
import javax.jnlp.FileContents;
import java.io.*;
import java.net.*;


/**
 * Demonstrates the JLF Actions classes.
 *
 * - The actions use the JLF icons, text and mnemonics.
 * - Actions are shared between the JToolBar and JMenuBar.
 * - if an Action is enabled/disabled then it will be disabled in both places.
 * - When a mouse is over a toolbar button or a menu item, then the long
 *   description of that action will be displayed in the status bar.
 * - Abstracts the actionPerformed method from the Action class to a handler.
 *
 *
 */

public class WebPad extends JFrame implements ActionListener {
    
    // These are the actions defined for the application
    private AboutAction aboutAction;
    private CutAction cutAction;
    private CopyAction copyAction;
    private PasteAction pasteAction;
    private OpenAction openAction;
    private SaveAction saveAction;
    private SaveAsAction saveAsAction;
    private PrintAction printAction;
    private HelpAction helpAction;
    private ExitAction exitAction;
    private PublishAction publishAction;
    private ShowAction showAction;

    private ClassLoader cl;    
    // Vector for holding all the actions.
    private Vector actions;
    
    // Status bar
    private JLabel status;
    
    // Text area which acts as a clipboard.
    private JTextArea textArea;
    
    // This adapter handles Mouse over messages on toolbar buttons and
    // menu items.
    private MouseHandler mouseHandler;
    
    // Popup Menu with the actions.
    private JPopupMenu popup;
   
    private PersistenceService ps;
    private BasicService bs;
    private FileContents fc;
 
    public WebPad() {
        super("WebPad");

        cl = this.getClass().getClassLoader();
        initActions();
        
        status = createStatusBar();
        mouseHandler = new MouseHandler(status);
        
        setJMenuBar(createMenu());
        getContentPane().add(createToolBar(), BorderLayout.NORTH);
        getContentPane().add(createPanel(), BorderLayout.CENTER);
        getContentPane().add(status, BorderLayout.SOUTH);
        
        popup = createPopupMenu();
        
        initPersistence();

        addWindowListener(new WindowAdapter()  {
		    public void windowClosing(WindowEvent evt)  {
			System.exit(0);
		    }
		});
        
    }
    
    // This method should be called before creating the UI
    // to create all the Actions
    private void initActions()  {
        actions = new Vector();
        
        aboutAction = new AboutAction();
        registerAction(aboutAction);
        
        cutAction = new CutAction();
        registerAction(cutAction);
        
        copyAction = new CopyAction();
        registerAction(copyAction);
        
        pasteAction = new PasteAction();
        registerAction(pasteAction);
	
	
        openAction = new OpenAction();
	registerAction(openAction);
	
	saveAction = new SaveAction();
	registerAction(saveAction);
	
	saveAsAction = new SaveAsAction();
	registerAction(saveAsAction);
        
        printAction = new PrintAction();
        registerAction(printAction);
	
	exitAction = new ExitAction();
	registerAction(exitAction);
	
	helpAction = new HelpAction();
	registerAction(helpAction);
	
	publishAction = new PublishAction();
	registerAction(publishAction);
	
	showAction = new ShowAction();
	registerAction(showAction);
    }
    
    private void registerAction(JLFAbstractAction action)  {
        action.addActionListener(this);
        actions.addElement(action);
    }
    
    // Creates the application menu bar.
    private JMenuBar createMenu()  {
        JMenuBar menuBar = new JMenuBar();
	
        JMenuItem menuItem;
	
        // Build the File menu
        JMenu fileMenu = new JMenu("File");
        fileMenu.setMnemonic('F');
	if (FileHandler.isEnabled()) {
	    menuItem = fileMenu.add(openAction);
	    menuItem.addMouseListener(mouseHandler);
	    menuItem = fileMenu.add(saveAction);
	    menuItem.addMouseListener(mouseHandler);
	    menuItem = fileMenu.add(saveAsAction);
	    menuItem.addMouseListener(mouseHandler);
	    menuItem = fileMenu.add(printAction);
	    menuItem.addMouseListener(mouseHandler);
	    fileMenu.add(new JSeparator());
	}
	menuItem = fileMenu.add(exitAction);
	menuItem.addMouseListener(mouseHandler);
	
        // Build the edit menu
        JMenu editMenu = new JMenu("Edit");
        editMenu.setMnemonic('E');
        menuItem = editMenu.add(cutAction);
        menuItem.addMouseListener(mouseHandler);
        menuItem = editMenu.add(copyAction);
        menuItem.addMouseListener(mouseHandler);
        menuItem = editMenu.add(pasteAction);
        menuItem.addMouseListener(mouseHandler);
	
	// Build the help menu
	JMenu helpMenu = new JMenu("Help");
	helpMenu.setMnemonic('H');
	menuItem = helpMenu.add(helpAction);
        menuItem.addMouseListener(mouseHandler);
        menuItem = helpMenu.add(aboutAction);
        menuItem.addMouseListener(mouseHandler);
	
        menuBar.add(fileMenu);
        menuBar.add(editMenu);
	if (WebHandler.isEnabled()) {
	    JMenu webMenu = new JMenu("Web");
	    webMenu.setMnemonic('W');
	    menuItem = webMenu.add(publishAction);
	    menuItem.addMouseListener(mouseHandler);
	    menuItem = webMenu.add(showAction);
	    menuItem.addMouseListener(mouseHandler);
	    menuBar.add(webMenu);
	}
	menuBar.add(helpMenu);
        
        return menuBar;
    }
    
    private JToolBar createToolBar()  {
        JToolBar toolbar = new JToolBar();
        
        JButton button;
        
        button = toolbar.add(cutAction);
        button.addMouseListener(mouseHandler);
        button = toolbar.add(copyAction);
        button.addMouseListener(mouseHandler);
        button = toolbar.add(pasteAction);
        button.addMouseListener(mouseHandler);
        toolbar.addSeparator();
        button = toolbar.add(aboutAction);
        button.addMouseListener(mouseHandler);
	
        return toolbar;
    }
    
    private JPopupMenu createPopupMenu()  {
        JPopupMenu menu = new JPopupMenu();
        
        JMenuItem menuItem;
        
        menuItem = menu.add(cutAction);
        menuItem.addMouseListener(mouseHandler);
        menuItem = menu.add(copyAction);
        menuItem.addMouseListener(mouseHandler);
        menuItem = menu.add(pasteAction);
        menuItem.addMouseListener(mouseHandler);
        menu.addSeparator();
        menuItem = menu.add(aboutAction);
        menuItem.addMouseListener(mouseHandler);