swingmediator.java

来自「google公司的用Java写的一个聊天软件的原代码」· Java 代码 · 共 716 行 · 第 1/2 页

				try
				{
					controller.sendChatMessage( line );
					msgController.showOwnMessage( line );
				}

				catch ( final CommandException e )
				{
					msgController.showSystemMessage( e.getMessage() );
				}
			}
		}

		mainP.getMsgTF().setText( "" );
	}

	/**
	 * Gets the text from the input field of the private chat, and
	 * sends it as a message to the user.
	 */
	@Override
	public void writePrivate( final PrivateChatWindow privchat )
	{
		String line = privchat.getChatText();
		NickDTO user = privchat.getUser();

		if ( line.trim().length() > 0 )
		{
			try
			{
				controller.sendPrivateMessage( line, user.getIpAddress(), user.getPrivateChatPort(), user.getCode() );
				msgController.showPrivateOwnMessage( user, line );
			}

			catch ( final CommandException e )
			{
				msgController.showPrivateSystemMessage( user, e.getMessage() );
			}
		}

		privchat.clearChatText();
	}

	/**
	 * Shows a list of the supported commands and their syntax.
	 */
	@Override
	public void showCommands()
	{
		cmdParser.showCommands();
	}

	/**
	 * Checks if the user is currently writing, and updates the status.
	 */
	@Override
	public void updateWriting()
	{
		if ( mainP.getMsgTF().getText().length() > 0 )
		{
			if ( !controller.isWrote() )
			{
				controller.changeWriting( me.getCode(), true );
			}
		}

		else
		{
			if ( controller.isWrote() )
			{
				controller.changeWriting( me.getCode(), false );
			}
		}
	}

	/**
	 * Changes the nick name of the user, if the nick is valid.
	 */
	@Override
	public boolean changeNick( final String nick )
	{
		String trimNick = nick.trim();

		if ( !trimNick.equals( me.getNick() ) )
		{
			if ( controller.isNickInUse( trimNick ) )
			{
				JOptionPane.showMessageDialog( null, "The nick is in use by someone else.", Constants.APP_NAME
						+ " - Change nick", JOptionPane.WARNING_MESSAGE );
			}

			else if ( !Tools.isValidNick( trimNick ) )
			{
				JOptionPane.showMessageDialog( null, "'" + trimNick + "' is not a valid nick name.\n\n"
						+ "A nick name can have between 1 and 10 characters.\nLegal characters are 'a-z',"
						+ " '0-9', '-' and '_'.", Constants.APP_NAME + " - Change nick", JOptionPane.WARNING_MESSAGE );
			}

			else
			{
				try
				{
					controller.changeMyNick( trimNick );
					msgController.showSystemMessage( "You changed nick to " + me.getNick() );
					updateTitleAndTray();
					return true;
				}

				catch ( final CommandException e )
				{
					JOptionPane.showMessageDialog( null, e.getMessage(),
							Constants.APP_NAME + " - Change nick", JOptionPane.WARNING_MESSAGE );
				}
			}
		}

		else
		{
			return true;
		}

		return false;
	}

	/**
	 * Runs when the user presses the cancel/close button in the
	 * transfer dialog. If the button's text is close, the dialog should
	 * close. If the text is cancel, the file transfer should stop,
	 * and the button should change text to close.
	 */
	@Override
	public void transferCancelled( final TransferDialog transferDialog )
	{
		if ( transferDialog.getCancelButtonText().equals( "Close" ) )
			transferDialog.dispose();

		else
		{
			transferDialog.setCancelButtonText( "Close" );
			FileTransfer fileTransfer = transferDialog.getFileTransfer();
			fileTransfer.cancel();

			if ( fileTransfer instanceof FileSender )
			{
				FileSender fs = (FileSender) fileTransfer;

				// This means that the other user has not answered yet
				if ( fs.isWaiting() )
				{
					msgController.showSystemMessage( "You cancelled sending of "
							+ fs.getFileName() + " to " + fs.getNick().getNick() );
					tList.removeFileSender( fs );
				}
			}
		}
	}

	/**
	 * When a new message arrives, and the application is minimized to the
	 * system tray, the system tray icon needs to be updated to show activity.
	 * If sound is enabled, a beep will be played as well.
	 */
	@Override
	public void notifyMessageArrived()
	{
		if ( !gui.isVisible() && me.isAway() )
		{
			sysTray.setAwayActivityState();
		}

		else if ( !gui.isVisible() )
		{
			sysTray.setNormalActivityState();
			beeper.beep();
		}
	}

	/**
	 * Gives a notification beep, and opens a dialog box asking if the user
	 * wants to accept a file transfer from another user.
	 */
	@Override
	public boolean askFileSave( final String user, final String fileName, final String size )
	{
		beeper.beep();

		Object[] options = { "Yes", "Cancel" };
		int choice = JOptionPane.showOptionDialog( null, user + " wants to send you the file "
				+ fileName + " (" + size + ")\nAccept?", Constants.APP_NAME + " - File send",
				JOptionPane.DEFAULT_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[0] );

		return choice == JOptionPane.YES_OPTION;
	}

	/**
	 * Opens a file chooser so the user can choose where to save a file
	 * another user is trying to send. Warns if the file name chosen
	 * already exists.
	 */
	@Override
	public File showFileSave( final String fileName )
	{
		File returnFile = null;
		JFileChooser chooser = new JFileChooser();
		chooser.setDialogTitle( Constants.APP_NAME + " - Save" );
		chooser.setSelectedFile( new File( fileName ) );
		boolean done = false;

		while ( !done )
		{
			done = true;
			int returnVal = chooser.showSaveDialog( null );

			if ( returnVal == JFileChooser.APPROVE_OPTION )
			{
				File file = chooser.getSelectedFile().getAbsoluteFile();

				if ( file.exists() )
				{
					Object[] options = { "Yes", "Cancel" };
					int overwrite = JOptionPane.showOptionDialog( null, file.getName()
							+ " already exists.\nOverwrite?", Constants.APP_NAME + " - File exists",
							JOptionPane.DEFAULT_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[0] );

					if ( overwrite != JOptionPane.YES_OPTION )
					{
						done = false;
					}
				}

				if ( done )
				{
					returnFile = file;
				}
			}
		}

		return returnFile;
	}

	/**
	 * Updates the titlebar and tray tooltip with current information.
	 */
	@Override
	public void showTopic()
	{
		updateTitleAndTray();
	}

	/**
	 * Creates a new {@link TransferDialog} for that {@link FileReceiver}.
	 */
	@Override
	public void showTransfer( final FileReceiver fileRes )
	{
		new TransferDialog( this, fileRes );
	}

	/**
	 * Creates a new {@link TransferDialog} for that {@link FileSender}.
	 */
	@Override
	public void showTransfer( final FileSender fileSend )
	{
		new TransferDialog( this, fileSend );
	}

	/**
	 * Updates the gui components depending on the away state.
	 */
	@Override
	public void changeAway( final boolean away )
	{
		if ( away )
		{
			sysTray.setAwayState();
			mainP.getMsgTF().setEnabled( false );
			menuBar.setAwayState( true );
			buttonP.setAwayState( true );
		}

		else
		{
			sysTray.setNormalState();
			mainP.getMsgTF().setEnabled( true );
			menuBar.setAwayState( false );
			buttonP.setAwayState( false );
		}

		updateAwayInPrivChats( away );
		updateTitleAndTray();
	}

	/**
	 * Notifies the open private chat windows that the away state has changed.
	 *
	 * @param away If the user is away.
	 */
	private void updateAwayInPrivChats( final boolean away )
	{
		NickList list = controller.getNickList();

		for ( int i = 0; i < list.size(); i++ )
		{
			NickDTO user = list.get( i );

			if ( user.getPrivchat() != null )
			{
				if ( !user.isAway() )
				{
					user.getPrivchat().setAway( away );
				}

				if ( away )
				{
					msgController.showPrivateSystemMessage( user, "You went away: " + me.getAwayMsg() );
				}

				else
				{
					msgController.showPrivateSystemMessage( user, "You came back" );
				}
			}
		}
	}

	/**
	 * If the user does not have a private chat window already,
	 * one is created.
	 */
	@Override
	public void createPrivChat( final NickDTO user )
	{
		if ( user.getPrivchat() == null )
			user.setPrivchat( new PrivateChatFrame( this, user ) );
	}

	/**
	 * Shows the user's private chat window.
	 */
	@Override
	public void showPrivChat( final NickDTO user )
	{
		createPrivChat( user );
		user.getPrivchat().setVisible( true );
		controller.changeNewMessage( user.getCode(), false );
	}

	/**
	 * Returns the message controller for swing.
	 */
	@Override
	public MessageController getMessageController()
	{
		return msgController;
	}
}