swingmediator.java

google公司的用Java写的一个聊天软件的原代码

/***************************************************************************
 *   Copyright 2006-2008 by Christian Ihle                                 *
 *   [e-mail]                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

package net.usikkert.kouchat.ui.swing;

import java.io.File;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

import net.usikkert.kouchat.Constants;
import net.usikkert.kouchat.misc.CommandParser;
import net.usikkert.kouchat.misc.Controller;
import net.usikkert.kouchat.misc.CommandException;
import net.usikkert.kouchat.misc.MessageController;
import net.usikkert.kouchat.misc.NickDTO;
import net.usikkert.kouchat.misc.NickList;
import net.usikkert.kouchat.misc.Settings;
import net.usikkert.kouchat.misc.SoundBeeper;
import net.usikkert.kouchat.misc.TopicDTO;
import net.usikkert.kouchat.net.FileReceiver;
import net.usikkert.kouchat.net.FileSender;
import net.usikkert.kouchat.net.FileTransfer;
import net.usikkert.kouchat.net.TransferList;
import net.usikkert.kouchat.ui.PrivateChatWindow;
import net.usikkert.kouchat.ui.UserInterface;
import net.usikkert.kouchat.util.Tools;

/**
 * This class is a mediator for the gui, and gets all the events from the gui layer
 * that needs access to other components, or classes in lower layers. It is also
 * the interface for classes in lower layers to update the gui.
 *
 * @author Christian Ihle
 */
public class SwingMediator implements Mediator, UserInterface
{
	private final SidePanel sideP;
	private final SettingsDialog settingsDialog;
	private final KouChatFrame gui;
	private final MainPanel mainP;
	private final SysTray sysTray;
	private final MenuBar menuBar;
	private final ButtonPanel buttonP;

	private final Controller controller;
	private final Settings settings;
	private final NickDTO me;
	private final TransferList tList;
	private final CommandParser cmdParser;
	private final SoundBeeper beeper;
	private final MessageController msgController;

	/**
	 * Constructor. Initializes the lower layers.
	 *
	 * @param compHandler An object with references to all
	 * the gui components this mediator works with.
	 */
	public SwingMediator( final ComponentHandler compHandler )
	{
		sideP = compHandler.getSidePanel();
		settingsDialog = compHandler.getSettingsDialog();
		gui = compHandler.getGui();
		mainP = compHandler.getMainPanel();
		sysTray = compHandler.getSysTray();
		menuBar = compHandler.getMenuBar();
		buttonP = compHandler.getButtonPanel();

		msgController = new MessageController( mainP, this );
		controller = new Controller( this );
		tList = controller.getTransferList();
		settings = Settings.getSettings();
		me = settings.getMe();
		cmdParser = new CommandParser( controller, this );
		beeper = new SoundBeeper();

		if ( !sysTray.isSystemTraySupport() )
		{
			buttonP.disableMinimize();
			menuBar.disableMinimize();
		}

		sideP.setNickList( controller.getNickList() );
		mainP.setAutoCompleter( controller.getAutoCompleter() );
		msgController.showSystemMessage( "Welcome to " + Constants.APP_NAME + " v" + Constants.APP_VERSION + "!" );
	}

	/**
	 * Hides the main window in the system tray,
	 * if a system tray is supported.
	 */
	@Override
	public void minimize()
	{
		if ( sysTray.isSystemTraySupport() )
			gui.setVisible( false );
	}

	/**
	 * Clears all the text from the main chat area.
	 */
	@Override
	public void clearChat()
	{
		mainP.clearChat();
		mainP.getMsgTF().requestFocusInWindow();
	}

	/**
	 * If the user is not away, asks for an away reason,
	 * and sets the user as away.
	 *
	 * If user is away, asks if the user wants to come back.
	 */
	@Override
	public void setAway()
	{
		if ( me.isAway() )
		{
			Object[] options = { "Yes", "Cancel" };
			int choice = JOptionPane.showOptionDialog( null, "Back from '" + me.getAwayMsg()
					+ "'?", Constants.APP_NAME + " - Away", JOptionPane.DEFAULT_OPTION,
					JOptionPane.QUESTION_MESSAGE, null, options, options[0] );

			if ( choice == JOptionPane.YES_OPTION )
			{
				try
				{
					controller.changeAwayStatus( me.getCode(), false, "" );
					controller.sendBackMessage();
					changeAway( false );
					msgController.showSystemMessage( "You came back" );
				}

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

		else
		{
			String reason = JOptionPane.showInputDialog( null, "Reason for away?",
					Constants.APP_NAME + " - Away", JOptionPane.QUESTION_MESSAGE );

			if ( reason != null && reason.trim().length() > 0 )
			{
				if ( controller.isWrote() )
				{
					controller.changeWriting( me.getCode(), false );
					mainP.getMsgTF().setText( "" );
				}

				try
				{
					controller.changeAwayStatus( me.getCode(), true, reason );
					controller.sendAwayMessage();
					changeAway( true );
					msgController.showSystemMessage( "You went away: " + me.getAwayMsg() );
				}

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

		mainP.getMsgTF().requestFocusInWindow();
	}

	/**
	 * Asks for the new topic, and changes it.
	 */
	@Override
	public void setTopic()
	{
		TopicDTO topic = controller.getTopic();

		Object objecttopic = JOptionPane.showInputDialog( null, "Change topic?", Constants.APP_NAME
				+ " - Topic", JOptionPane.QUESTION_MESSAGE, null, null, topic.getTopic() );

		if ( objecttopic != null )
		{
			String newTopic = objecttopic.toString();
			cmdParser.fixTopic( newTopic );
		}

		mainP.getMsgTF().requestFocusInWindow();
	}

	/**
	 * Logs on to the network.
	 */
	@Override
	public void start()
	{
		controller.logOn();
		updateTitleAndTray();
	}

	/**
	 * Asks if the user wants to quit.
	 */
	@Override
	public void quit()
	{
		Object[] options = { "Yes", "Cancel" };
		int choice = JOptionPane.showOptionDialog( null, "Are you sure you want to quit?",
				Constants.APP_NAME + " - Quit?", JOptionPane.DEFAULT_OPTION, JOptionPane.QUESTION_MESSAGE,
				null, options, options[0] );

		if ( choice == JOptionPane.YES_OPTION )
		{
			System.exit( 0 );
		}
	}

	/**
	 * Updates the titlebar and the system tray tooltip with
	 * current information about the application and the user.
	 */
	@Override
	public void updateTitleAndTray()
	{
		if ( me != null )
		{
			String title = Constants.APP_NAME + " v" + Constants.APP_VERSION + " - Nick: " + me.getNick();
			String tooltip = Constants.APP_NAME + " v" + Constants.APP_VERSION + " - " + me.getNick();

			if ( !controller.isConnected() )
			{
				title += " - (Not connected)";
				tooltip += " - (Not connected)";
			}

			else
			{
				if ( me.isAway() )
				{
					title += " (Away)";
					tooltip += " (Away)";
				}

				if ( controller.getTopic().getTopic().length() > 0 )
					title += " - Topic: " + controller.getTopic();
			}

			gui.setTitle( title );
			sysTray.setToolTip( tooltip );
		}
	}

	/**
	 * Shows or hides the main window.
	 * The window will always be brought to front when shown.
	 */
	@Override
	public void showWindow()
	{
		if ( gui.isVisible() )
			gui.setVisible( false );

		else
		{
			if ( gui.getExtendedState() == JFrame.ICONIFIED )
				gui.setExtendedState( JFrame.NORMAL );

			gui.setVisible( true );
			gui.toFront();
		}
	}

	/**
	 * Opens the settings dialog window.
	 */
	@Override
	public void showSettings()
	{
		settingsDialog.showSettings();
	}

	/**
	 * Opens a file chooser, where the user can select a file to send to
	 * another user.
	 */
	@Override
	public void sendFile( final NickDTO user, final File selectedFile )
	{
		if ( me == user )
		{
			JOptionPane.showMessageDialog( null, "No point in doing that!", Constants.APP_NAME
					+ " - Warning", JOptionPane.WARNING_MESSAGE );
		}

		else if ( user != null && !user.isAway() && !me.isAway() )
		{
			JFileChooser chooser = new JFileChooser();
			chooser.setDialogTitle( Constants.APP_NAME + " - Open" );

			if ( selectedFile != null && selectedFile.exists() )
				chooser.setSelectedFile( selectedFile );

			int returnVal = chooser.showOpenDialog( null );

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

				if ( file.exists() && file.isFile() )
				{
					cmdParser.sendFile( user, file );
				}
			}
		}
	}

	/**
	 * Gets the text written in the input field and either sends it to
	 * the command parser or sends it as a message.
	 */
	@Override
	public void write()
	{
		String line = mainP.getMsgTF().getText();

		if ( line.trim().length() > 0 )
		{
			if ( line.startsWith( "/" ) )
			{
				cmdParser.parse( line );
			}

			else
			{