applet.java

java 平台 telnet 繁体中文版

	    System.out.println("Applet: access for '"+
	                       privileges.elementAt(i)+"' allowed");

	   } catch(Exception e) {
	     System.err.println("Applet: access for '"+
	                        privileges.elementAt(i)+"' denied");
	   }

        // set up the clipboard
	try {
          clipboard = appletFrame.getToolkit().getSystemClipboard();
	  System.err.println("Applet: acquired system clipboard: "+clipboard);
        } catch(Exception e) {
          System.err.println("Applet: system clipboard access denied: "+
	    ((e instanceof InvocationTargetException) ? 
	      ((InvocationTargetException)e).getTargetException() : e));
	  // e.printStackTrace();
        } finally {
	  if(clipboard == null) {
            System.err.println("Applet: copy & paste only within the JTA");
            clipboard = new Clipboard("de.mud.jta.Main");
	  }
        }
	  
	if((new Boolean(options.getProperty("Applet.detach.immediately"))
	     .booleanValue())) {
	  if((new Boolean(options.getProperty("Applet.detach.fullscreen"))
	     .booleanValue()))
	    ((Frame)appletFrame)
	      .setSize(appletFrame.getToolkit().getScreenSize());
	  else
            ((Frame)appletFrame).pack();

	  ((Frame)appletFrame).show();
	  pluginLoader.broadcast(new ReturnFocusRequest());
	  close.setLabel(startText != null ? stopText : "Disconnect");
	} else
	  close.setLabel(startText != null ? startText : "Connect");

	close.addActionListener(new ActionListener() {
	  public void actionPerformed(ActionEvent evt) {
	    if(((Frame)appletFrame).isVisible()) {
	      pluginLoader.broadcast(new SocketRequest());
	      ((Frame)appletFrame).setVisible(false);
	      close.setLabel(startText != null ? startText : "Connect");
	    } else {
	      if(frameTitle == null)
              ((Frame)appletFrame)
	        .setTitle("jta: "+host+(port.equals("23")?"":" "+port));
	      if((new Boolean(options.getProperty("Applet.detach.fullscreen"))
	         .booleanValue()))
	        ((Frame)appletFrame)
	          .setSize(appletFrame.getToolkit().getScreenSize());
	      else
	        ((Frame)appletFrame).pack();
              ((Frame)appletFrame).show();
              getAppletContext().showStatus("Trying "+host+" "+port+" ...");
              pluginLoader.broadcast(new SocketRequest(host, 
	                                               Integer.parseInt(port)));
              pluginLoader.broadcast(new ReturnFocusRequest());
	      close.setLabel(stopText != null ? stopText : "Disconnect");
	    }
          }
	});

	 setLayout(new BorderLayout());
	 add("Center", close);

	// add a menu bar
        MenuBar mb = new MenuBar();
        Menu file = new Menu("File");
        file.setShortcut(new MenuShortcut(KeyEvent.VK_H, true));
        MenuItem tmp;
        file.add(tmp = new MenuItem("Connect"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
            pluginLoader.broadcast(new SocketRequest(host, 
	                                             Integer.parseInt(port)));
          }
        });
        file.add(tmp = new MenuItem("Disconnect"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
            pluginLoader.broadcast(new SocketRequest());
          }
        });
	file.add(new MenuItem("-"));
        file.add(tmp = new MenuItem("Print"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
            if(pluginLoader.getComponents().get("Terminal") != null) {
              PrintJob printJob = 
                appletFrame.getToolkit()
                  .getPrintJob((Frame)appletFrame,"JTA Terminal",null);
              ((Component)pluginLoader.getComponents().get("Terminal"))
                .print(printJob.getGraphics());
              printJob.end();
            }
          }
        });
        file.add(new MenuItem("-"));
        file.add(tmp = new MenuItem("Exit"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
            ((Frame)appletFrame).setVisible(false);
	    pluginLoader.broadcast(new SocketRequest());
	    close.setLabel(startText != null ? startText : "Connect");
          }
        });
	mb.add(file);

	Menu edit = new Menu("Edit");
        edit.setShortcut(new MenuShortcut(KeyEvent.VK_H, true));
        edit.add(tmp = new MenuItem("Copy"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
	    if(debug > 2)
	      System.err.println("Applet: copy: "+focussedPlugin);
            if(focussedPlugin instanceof VisualTransferPlugin)
	      ((VisualTransferPlugin)focussedPlugin).copy(clipboard);
          }
        });
        edit.add(tmp = new MenuItem("Paste"));
        tmp.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent evt) {
	    if(debug > 2)
	      System.err.println("Applet: paste: "+focussedPlugin);
            if(focussedPlugin instanceof VisualTransferPlugin)
	      ((VisualTransferPlugin)focussedPlugin).paste(clipboard);
          }
        });
        mb.add(edit);

	Hashtable menuList = pluginLoader.getMenus();
        names = menuList.keys();
        while(names.hasMoreElements()) {
          String name = (String)names.nextElement();
          mb.add((Menu)menuList.get(name));
        }

	// only add the menubar if the property is true
        if((new Boolean(options.getProperty("Applet.detach.menuBar"))
           .booleanValue()))
          ((Frame)appletFrame).setMenuBar(mb);

	// add window closing event handler
        try {
          ((Frame)appletFrame).addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent evt) {
	      pluginLoader.broadcast(new SocketRequest());
              ((Frame)appletFrame).setVisible(false);
	      close.setLabel(startText != null ? startText : "Connect");
	    }
	  });
	} catch(Exception e) {
	  System.err.println("Applet: could not set up Window event listener");
	  System.err.println("Applet: you will not be able to close it");
	}

        pluginLoader.registerPluginListener(new OnlineStatusListener() {
          public void online() {
	    if(debug > 0) System.err.println("Terminal: online");
            online = true;
            if(((Frame)appletFrame).isVisible() == false)
      	      ((Frame)appletFrame).setVisible(true);
	  } 
	  public void offline() {
	    if(debug > 0) System.err.println("Terminal: offline");
            online=false;
	    if(disconnectCloseWindow) {
	      ((Frame)appletFrame).setVisible(false);
	      close.setLabel(startText != null ? startText : "Connect");
	    }
	  }
        });

        // register a focus status listener, so we know when a plugin got focus
        pluginLoader.registerPluginListener(new FocusStatusListener() {
          public void pluginGainedFocus(Plugin plugin) {
            if(Applet.debug > 0)
	      System.err.println("Applet: "+plugin+" got focus");
            focussedPlugin = plugin;
          }
          public void pluginLostFocus(Plugin plugin) {
            // we ignore the lost focus
            if(Applet.debug > 0)
              System.err.println("Applet: "+plugin+" lost focus");
          }
        });

      } else
        // if we have no external frame use this online status listener
        pluginLoader.registerPluginListener(new OnlineStatusListener() {
          public void online() {
            if(debug > 0) System.err.println("Terminal: online");
            online = true;
          }
          public void offline() {
            if(debug > 0) System.err.println("Terminal: offline");
            online=false;
          }
        });
 

    }
  }

  /**
   * Start the applet. Connect to the remote host.
   */
  public void start() {
    if(!online && (appletFrame == this || connect)) {
      if(debug > 0) System.err.println("start("+host+", "+port+")");
      getAppletContext().showStatus("Trying "+host+" "+port+" ...");
      pluginLoader.broadcast(new SocketRequest(host, Integer.parseInt(port)));
      pluginLoader.broadcast(new ReturnFocusRequest());
    } 
  }

  /**
   * Stop the applet and disconnect.
   */
  public void stop() {
    if(online && disconnect) {
      if(debug > 0) System.err.println("stop()");
      pluginLoader.broadcast(new SocketRequest());
    }
  }

  /**
   * Override any properties that are found in the configuration files
   * with possible values found as applet parameters.
   * @param options the loaded configuration file properties
   */
  private void parameterOverride(Properties options) {
    Enumeration e = options.keys();
    while(e.hasMoreElements()) {
      String key = (String)e.nextElement(), value = getParameter(key);
      if(value != null) {
	System.out.println("Applet: overriding value of "+key+" with "+value);
        // options.setProperty(key, value);
        options.put(key, value);
      }
    }
  }
}