/* 
 * File: FrameMenus.java
 *
 * This applet/application demonstrates the following classes:  
 * TextArea, Frame, MenuBar, Menu, MenuItem, CheckboxMenuItem, 
 * and MenuShortcut.
 *
 * Note that MenuItems generate ActionEvents, while CheckboxMenuItems 
 * generate ItemEvents.
 *
 */

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class FrameMenus extends Applet implements ActionListener {

  private Button button;
  
  public void init() {
    button = new Button( "New Web Browser" );
    add( button );
    button.addActionListener( this );    
  }
  
  public void actionPerformed( ActionEvent e ) {
    new NewWebBrowser();
  }
  
  // This applet also runs as an application:
  public static void main( String[] args ) {
    new NewWebBrowser();
  }
  
}

// Simulate a Netscape web browser window:
class NewWebBrowser extends Frame {

  protected static int num_windows = 0;     // number of open windows
  
  String ellipsis = "...";                  // ellipsis for menu items
  // char ellipsis = '\u2026';              // Why doesn't this work?

  // GUI components:
  MenuBar menubar;
  TextArea textarea;
  
  // Constructor:
  public NewWebBrowser() {
  
    // Invoke the constructor of the superclass:
    super( "Web Browser" );
    
    num_windows++;                          // update window counter
    
    // Set frame parameters:
    setSize( 700, 800 );
    setFont( new Font( "SansSerif", Font.BOLD, 12 ) );
    
    textarea = new TextArea();
    add( textarea, BorderLayout.CENTER );
    textarea.setFont( new Font( "Monospaced", Font.BOLD, 10 ) );
    
    menubar = new MenuBar();
    menubar.add( new FileMenu() );
    menubar.add( new EditMenu() );
    menubar.add( new ViewMenu() );
    menubar.add( new GoMenu() );
    menubar.add( new BookmarksMenu() );
    menubar.add( new OptionsMenu() );
    menubar.add( new DirectoryMenu() );
    menubar.add( new WindowMenu() );
    menubar.setHelpMenu( new HelpMenu() );  // the Help menu is special
    
    setMenuBar( menubar );
    setVisible( true );
  }
  
  class FileMenu extends Menu implements ActionListener {
  
    // Menu item names:
    MenuItem newWebBrowserItem,
             newMailMessageItem,
             mailDocumentItem,
             openLocationItem,
             openFileItem,
             saveAsItem,
             uploadFileItem,
             printItem,
             closeItem,
             exitItem;
    
    // Menu constructor:
    public FileMenu() {
    
      // Invoke the constructor of the superclass:
      super( "File" );

      // Menu items with shortcuts:
      newWebBrowserItem  
        = new MenuItem( "New Web Browser", 
                        new MenuShortcut( KeyEvent.VK_N ) );
      newMailMessageItem 
        = new MenuItem( "New Mail Message", 
                        new MenuShortcut( KeyEvent.VK_M ) );
      mailDocumentItem   
        = new MenuItem( "Mail Document" );
        
      openLocationItem   
        = new MenuItem( "Open Location" + ellipsis, 
                        new MenuShortcut( KeyEvent.VK_L ) );
      openFileItem       
        = new MenuItem( "Open File" + ellipsis, 
                        new MenuShortcut( KeyEvent.VK_O ) );
      saveAsItem         
        = new MenuItem( "Save As" + ellipsis, 
                        new MenuShortcut( KeyEvent.VK_S ) );
      uploadFileItem     
        = new MenuItem( "Upload File" + ellipsis );
        
      printItem          
        = new MenuItem( "Print" + ellipsis, 
                        new MenuShortcut( KeyEvent.VK_P ) );
      closeItem          
        = new MenuItem( "Close", 
                        new MenuShortcut( KeyEvent.VK_W ) );
      exitItem           
        = new MenuItem( "Exit", 
                        new MenuShortcut( KeyEvent.VK_Q ) );
      
      // Build the menu:
      add( newWebBrowserItem );
      add( newMailMessageItem );
      add( mailDocumentItem );
      addSeparator();
      add( openLocationItem );
      add( openFileItem );
      add( saveAsItem );
      add( uploadFileItem );
      addSeparator();
      add( printItem );
      addSeparator();
      add( closeItem );
      add( exitItem );
      
      // Disable menu item(s):
      uploadFileItem.setEnabled( false );

      // Listen for ActionEvents generated by menu items:
      newWebBrowserItem.addActionListener( this );
      exitItem.addActionListener( this );
    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    
      // File:New
      if ( e.getSource() == newWebBrowserItem ) {
        new NewWebBrowser();
        
      // File:Exit
      } else if ( e.getSource() == exitItem ) {
        setVisible( false );
        dispose();
        if ( --num_windows == 0 ) {
          // System.exit(0);
        }
      }
    }
    
  }

  class EditMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public EditMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Edit" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class ViewMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public ViewMenu() {
    
      // Invoke the constructor of the superclass:
      super( "View" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class GoMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public GoMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Go" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class BookmarksMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public BookmarksMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Bookmarks" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class OptionsMenu extends Menu implements ActionListener {
  
    // Menu item names:
    MenuItem generalPrefs,
             mailAndNewsPrefs,
             networkPrefs,
             securityPrefs;
    
    // Checkable menu item names:
    CheckboxMenuItem showMenubarItem,
                     showToolbarItem,
                     showLocationItem,
                     showDirectoryButtonsItem,
                     showJavaConsoleItem;
    
    // Menu constructor:
    public OptionsMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Options" );

      // Menu items:
      generalPrefs = new MenuItem( "General Preferences" + ellipsis );
      mailAndNewsPrefs = new MenuItem( "Mail and News Preferences" + ellipsis );
      networkPrefs = new MenuItem( "Network Preferences" + ellipsis );
      securityPrefs = new MenuItem( "Security Preferences" + ellipsis );
      
      // Checkable menu items:
      showMenubarItem = new CheckboxMenuItem( "Show Menubar" );
      showMenubarItem.setState( true );  // checked by default
      showToolbarItem = new CheckboxMenuItem( "Show Toolbar" );
      showLocationItem = new CheckboxMenuItem( "Show Location" );
      showDirectoryButtonsItem = new CheckboxMenuItem( "Show Directory Buttons" );
      showJavaConsoleItem = new CheckboxMenuItem( "Show Java Console" );
      
      // Build the menu:
      add( generalPrefs );
      add( mailAndNewsPrefs );
      add( networkPrefs );
      add( securityPrefs );
      addSeparator();
      add( showMenubarItem );
      add( showToolbarItem );
      add( showLocationItem );
      add( showDirectoryButtonsItem );
      add( showJavaConsoleItem );
      addSeparator();
      add( new DocEncodingSubmenu() );
  
    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
    class DocEncodingSubmenu extends Menu implements ActionListener {
    
      // Menu constructor:
      public DocEncodingSubmenu() {
      
        // Invoke the constructor of the superclass:
        super( "Document Encoding" );
  
        // Build the menu:
        add( new CheckboxMenuItem( "Western (Latin-1)", true ) );
        addSeparator();
        add( new CheckboxMenuItem( "Central European (Latin-2)" ) );
        addSeparator();
        add( new CheckboxMenuItem( "Japanese (Auto-Detect)" ) );
        add( new CheckboxMenuItem( "Japanese (Shift-JIS)" ) );
        add( new CheckboxMenuItem( "Japanese (EUC-JP)" ) );
        // (many more such items omitted)
    
      }
    
      // ActionEvent handler:
      public void actionPerformed( ActionEvent e ) {
      }
      
    }

  }

  class DirectoryMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public DirectoryMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Directory" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class WindowMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public WindowMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Window" );

    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

  class HelpMenu extends Menu implements ActionListener {
  
    // Menu constructor:
    public HelpMenu() {
    
      // Invoke the constructor of the superclass:
      super( "Help" );

      // Build the menu:
      add( new MenuItem( "About Netscape" ) );
      add( new MenuItem( "About Plug-ins" ) );
      add( new MenuItem( "Registration Information" ) );
      add( new MenuItem( "Software" ) );
      addSeparator();
      add( new MenuItem( "Handbook" ) );
  
    }
  
    // ActionEvent handler:
    public void actionPerformed( ActionEvent e ) {
    }
    
  }

}