pom.xml

@@ -67,7 +67,7 @@
 		<dependency>
 			<groupId>info.picocli</groupId>
 			<artifactId>picocli</artifactId>
-			<version>4.7.7</version>
+			<version>2.2.0</version>
 		</dependency>
 	</dependencies>
   

src/main/java/net/vhati/modmanager/FTLModManager.java

@@ -1,8 +1,14 @@
 package net.vhati.modmanager;
 
 import java.io.File;
+import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
+import javax.swing.JFileChooser;
+import javax.swing.JOptionPane;
+import javax.swing.LookAndFeel;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
 
 import ch.qos.logback.classic.LoggerContext;
 import ch.qos.logback.classic.spi.ILoggingEvent;
@@ -14,16 +20,22 @@ import org.slf4j.bridge.SLF4JBridgeHandler;
 
 import net.vhati.modmanager.cli.SlipstreamCLI;
 import net.vhati.modmanager.core.ComparableVersion;
+import net.vhati.modmanager.core.FTLUtilities;
+import net.vhati.modmanager.core.SlipstreamConfig;
+import net.vhati.modmanager.ui.ManagerFrame;
 
 
 public class FTLModManager {
 
-	private static final Logger log = LoggerFactory.getLogger(FTLModManager.class);
+	private static final Logger log = LoggerFactory.getLogger( FTLModManager.class );
 
 	public static final String APP_NAME = "Slipstream Mod Manager";
-	public static final ComparableVersion APP_VERSION = new ComparableVersion("1.9.1");
+	public static final ComparableVersion APP_VERSION = new ComparableVersion( "1.9.1" );
+	public static final String APP_URL = "TODO";
+	public static final String APP_AUTHOR = "jan-leila";
 
-	public static void main(String[] args) {
+
+	public static void main( String[] args ) {
 		// Redirect any libraries' java.util.Logging messages.
 		SLF4JBridgeHandler.removeHandlersForRootLogger();
 		SLF4JBridgeHandler.install();
@@ -35,29 +47,299 @@ public class FTLModManager {
 		LoggerContext lc = (LoggerContext)LoggerFactory.getILoggerFactory();
 
 		PatternLayoutEncoder encoder = new PatternLayoutEncoder();
-		encoder.setContext(lc);
+		encoder.setContext( lc );
 		encoder.setCharset(StandardCharsets.UTF_8);
-		encoder.setPattern("%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n");
+		encoder.setPattern( "%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n" );
 		encoder.start();
 
-		FileAppender<ILoggingEvent> fileAppender = new FileAppender<>();
-		fileAppender.setContext(lc);
-		fileAppender.setName("LogFile");
-		fileAppender.setFile(new File("./modman-log.txt").getAbsolutePath());
-		fileAppender.setAppend(false);
-		fileAppender.setEncoder(encoder);
+		FileAppender<ILoggingEvent> fileAppender = new FileAppender<ILoggingEvent>();
+		fileAppender.setContext( lc );
+		fileAppender.setName( "LogFile" );
+		fileAppender.setFile( new File( "./modman-log.txt" ).getAbsolutePath() );
+		fileAppender.setAppend( false );
+		fileAppender.setEncoder( encoder );
 		fileAppender.start();
 
-		lc.getLogger(Logger.ROOT_LOGGER_NAME).addAppender(fileAppender);
+		lc.getLogger( Logger.ROOT_LOGGER_NAME ).addAppender( fileAppender );
 
 		// Log a welcome message.
-		log.debug("Started: {}", new Date());
-		log.debug("{} v{}", APP_NAME, APP_VERSION);
-		log.debug("OS: {} {}", System.getProperty("os.name"), System.getProperty("os.version"));
-		log.debug("VM: {}, {}, {}", System.getProperty("java.vm.name"), System.getProperty("java.version"), System.getProperty("os.arch"));
+		log.debug( "Started: {}", new Date() );
+		log.debug( "{} v{}", APP_NAME, APP_VERSION );
+		log.debug( "OS: {} {}", System.getProperty( "os.name" ), System.getProperty( "os.version" ) );
+		log.debug( "VM: {}, {}, {}", System.getProperty( "java.vm.name" ), System.getProperty( "java.version" ), System.getProperty( "os.arch" ) );
 
-		Thread.setDefaultUncaughtExceptionHandler((t, e) -> log.error("Uncaught exception in thread: {}", t.toString(), e));
+		Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
+			@Override
+			public void uncaughtException( Thread t, Throwable e ) {
+                log.error("Uncaught exception in thread: {}", t.toString(), e);
+			}
+		});
 
-		SlipstreamCLI.main(args);
+		if ( args.length > 0 ) {
+			SlipstreamCLI.main( args );
+			return;
+		}
+
+		// Ensure all popups are triggered from the event dispatch thread.
+		SwingUtilities.invokeLater(FTLModManager::guiInit);
+	}
+
+
+	private static void guiInit() {
+		try {
+			// TODO: get mods file from env var
+			// Nag if the jar was double-clicked.
+			if (!new File("./mods/").exists()) {
+				String currentPath = new File( "." ).getAbsoluteFile().getParentFile().getAbsolutePath();
+
+				log.error( String.format( "Slipstream could not find its own folder (Currently in \"%s\"), exiting...", currentPath ) );
+				showErrorDialog( String.format( "Slipstream could not find its own folder.\nCurrently in: %s\n\nRun one of the following instead of the jar...\nWindows: modman.exe or modman_admin.exe\nLinux/OSX: modman.command or modman-cli.sh\n\nSlipstream will now exit.", currentPath ) );
+
+				throw new ExitException();
+			}
+
+			// TODO: get config file from env var
+			File configFile = new File( "modman.cfg" );
+
+			SlipstreamConfig appConfig = new SlipstreamConfig(configFile);
+
+			// Look-and-Feel.
+			boolean useDefaultUI = Boolean.parseBoolean(appConfig.getProperty(SlipstreamConfig.USE_DEFAULT_UI, "false"));
+
+			if ( !useDefaultUI ) {
+				LookAndFeel defaultLaf = UIManager.getLookAndFeel();
+				log.debug( "Default look and feel is: "+ defaultLaf.getName() );
+
+				try {
+					log.debug( "Setting system look and feel: "+ UIManager.getSystemLookAndFeelClassName() );
+
+					// SystemLaf is risky. It may throw an exception, or lead to graphical bugs.
+					// Problems are generally caused by custom Windows themes.
+					UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
+				}
+				catch ( Exception e ) {
+					log.error( "Failed to set system look and feel", e );
+					log.info( "Setting "+ SlipstreamConfig.USE_DEFAULT_UI +"=true in the config file to prevent this error..." );
+
+					appConfig.setProperty( SlipstreamConfig.USE_DEFAULT_UI, "true" );
+
+					try {
+						UIManager.setLookAndFeel( defaultLaf );
+					}
+					catch ( Exception f ) {
+						log.error( "Error returning to the default look and feel after failing to set system look and feel", f );
+
+						// Write an emergency config and exit.
+						try {
+							appConfig.writeConfig();
+						}
+						catch ( IOException g ) {
+							log.error( String.format( "Error writing config to \"%s\"", configFile.getPath(), g ) );
+						}
+
+						throw new ExitException();
+					}
+				}
+			}
+			else {
+				log.debug( "Using default Look and Feel" );
+			}
+
+			// FTL Resources Path.
+			File datsDir = null;
+			String datsPath = appConfig.getProperty( SlipstreamConfig.FTL_DATS_PATH, "" );
+
+			if ( datsPath.length() > 0 ) {
+				log.info( "Using FTL dats path from config: "+ datsPath );
+				datsDir = new File( datsPath );
+				if ( FTLUtilities.isDatsDirValid( datsDir ) == false ) {
+					log.error( "The config's "+ SlipstreamConfig.FTL_DATS_PATH +" does not exist, or it is invalid" );
+					datsDir = null;
+				}
+			}
+			else {
+				log.debug( "No "+ SlipstreamConfig.FTL_DATS_PATH +" previously set" );
+			}
+
+			// Find/prompt for the path to set in the config.
+			if ( datsDir == null ) {
+				datsDir = FTLUtilities.findDatsDir();
+				if ( datsDir != null ) {
+					int response = JOptionPane.showConfirmDialog( null, "FTL resources were found in:\n"+ datsDir.getPath() +"\nIs this correct?", "Confirm", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE );
+					if ( response == JOptionPane.NO_OPTION ) datsDir = null;
+				}
+
+				if ( datsDir == null ) {
+					log.debug( "FTL dats path was not located automatically. Prompting user for location" );
+					datsDir = FTLUtilities.promptForDatsDir( null );
+				}
+
+				if ( datsDir != null ) {
+					appConfig.setProperty( SlipstreamConfig.FTL_DATS_PATH, datsDir.getAbsolutePath() );
+					log.info( "FTL dats located at: "+ datsDir.getAbsolutePath() );
+				}
+			}
+
+			if ( datsDir == null ) {
+				showErrorDialog( "FTL resources were not found.\nSlipstream will now exit." );
+				log.debug( "No FTL dats path found, exiting" );
+
+				throw new ExitException();
+			}
+
+			// Ask about Steam.
+			if ( appConfig.getProperty( SlipstreamConfig.STEAM_DISTRO, "" ).length() == 0 ) {
+				int steamBasedResponse = JOptionPane.showConfirmDialog( null, "Was FTL installed via Steam?", "Confirm", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE );
+				if ( steamBasedResponse == JOptionPane.YES_OPTION ) {
+					appConfig.setProperty( SlipstreamConfig.STEAM_DISTRO, "true" );
+				}
+				else {
+					appConfig.setProperty( SlipstreamConfig.STEAM_DISTRO, "false" );
+				}
+			}
+
+			// If this is a Steam distro.
+			if ( "true".equals( appConfig.getProperty( SlipstreamConfig.STEAM_DISTRO, "false" ) ) ) {
+
+				// Find Steam's executable.
+				if ( appConfig.getProperty( SlipstreamConfig.STEAM_EXE_PATH, "" ).length() == 0 ) {
+
+					File steamExeFile = FTLUtilities.findSteamExe();
+
+					if ( steamExeFile == null && System.getProperty( "os.name" ).startsWith( "Windows" ) ) {
+						try {
+							String registryExePath = FTLUtilities.queryRegistryKey( "HKCU\\Software\\Valve\\Steam", "SteamExe", "REG_SZ" );
+							if ( registryExePath != null && !(steamExeFile=new File( registryExePath )).exists() ) {
+								steamExeFile = null;
+							}
+						}
+						catch( IOException e ) {
+							log.error( "Error while querying registry for Steam's path", e );
+						}
+					}
+
+					if ( steamExeFile != null ) {
+						int response = JOptionPane.showConfirmDialog( null, "Steam was found at:\n"+ steamExeFile.getPath() +"\nIs this correct?", "Confirm", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE );
+						if ( response == JOptionPane.NO_OPTION ) steamExeFile = null;
+					}
+
+					if ( steamExeFile == null ) {
+						log.debug( "Steam was not located automatically. Prompting user for location" );
+
+						String steamPrompt = ""
+							+ "You will be prompted to locate Steam's executable.\n"
+							+ "- Windows: Steam.exe\n"
+							+ "- Linux: steam\n"
+							+ "- OSX: Steam.app\n"
+							+ "\n"
+							+ "If you can't find it, you can cancel and set it later.";
+						JOptionPane.showMessageDialog( null, steamPrompt, "Find Steam", JOptionPane.INFORMATION_MESSAGE );
+
+						JFileChooser steamExeChooser = new JFileChooser();
+						steamExeChooser.setDialogTitle( "Find Steam.exe or steam or Steam.app" );
+						steamExeChooser.setFileHidingEnabled( false );
+						steamExeChooser.setMultiSelectionEnabled( false );
+
+						if ( steamExeChooser.showOpenDialog( null ) == JFileChooser.APPROVE_OPTION ) {
+							steamExeFile = steamExeChooser.getSelectedFile();
+							if ( !steamExeFile.exists() ) steamExeFile = null;
+						}
+					}
+
+					if ( steamExeFile != null ) {
+						appConfig.setProperty( SlipstreamConfig.STEAM_EXE_PATH, steamExeFile.getAbsolutePath() );
+						log.info( "Steam located at: "+ steamExeFile.getAbsolutePath() );
+					}
+				}
+
+				if ( appConfig.getProperty( SlipstreamConfig.STEAM_EXE_PATH, "" ).length() > 0 ) {
+
+					if ( appConfig.getProperty( SlipstreamConfig.RUN_STEAM_FTL, "" ).length() == 0 ) {
+
+						String[] launchOptions = new String[] {"Directly", "Steam"};
+						int launchResponse = JOptionPane.showOptionDialog( null, "Would you prefer to launch FTL directly, or via Steam?", "How to Launch?", JOptionPane.DEFAULT_OPTION, JOptionPane.PLAIN_MESSAGE, null, launchOptions, launchOptions[1] );
+						if ( launchResponse == 0 ) {
+							appConfig.setProperty( SlipstreamConfig.RUN_STEAM_FTL, "false" );
+						}
+						else if ( launchResponse == 1 ) {
+							appConfig.setProperty( SlipstreamConfig.RUN_STEAM_FTL, "true" );
+						}
+					}
+				}
+			}
+
+			// Prompt if update_catalog is invalid or hasn't been set.
+			boolean askAboutUpdates = false;
+			if ( !appConfig.getProperty( SlipstreamConfig.UPDATE_CATALOG, "" ).matches( "^\\d+$" ) )
+				askAboutUpdates = true;
+			if ( !appConfig.getProperty( SlipstreamConfig.UPDATE_APP, "" ).matches( "^\\d+$" ) )
+				askAboutUpdates = true;
+
+			if ( askAboutUpdates ) {
+				String updatePrompt = ""
+					+ "Would you like Slipstream to periodically check for updates?\n"
+					+ "\n"
+					+ "You can change this later.";
+
+				int response = JOptionPane.showConfirmDialog( null, updatePrompt, "Updates", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE );
+				if ( response == JOptionPane.YES_OPTION ) {
+					appConfig.setProperty( SlipstreamConfig.UPDATE_CATALOG, "7" );
+					appConfig.setProperty( SlipstreamConfig.UPDATE_APP, "4" );
+				}
+				else {
+					appConfig.setProperty( SlipstreamConfig.UPDATE_CATALOG, "0" );
+					appConfig.setProperty( SlipstreamConfig.UPDATE_APP, "0" );
+				}
+			}
+
+			ManagerFrame frame = null;
+			try {
+				frame = new ManagerFrame( appConfig, APP_NAME, APP_VERSION, APP_URL, APP_AUTHOR );
+				frame.init();
+				frame.setVisible( true );
+			}
+			catch ( Exception e ) {
+				log.error( "Failed to create and init the main window", e );
+
+				// If the frame is constructed, but an exception prevents it
+				// becoming visible, that *must* be caught. The frame registers
+				// itself as a global uncaught exception handler. It doesn't
+				// dispose() itself in the handler, so EDT will wait forever
+				// for an invisible window to close.
+
+				if ( frame != null && frame.isDisplayable() ) {
+					frame.setDisposeNormally( false );
+					frame.dispose();
+				}
+
+				throw new ExitException();
+			}
+		}
+		catch ( ExitException e ) {
+			System.gc();
+			// System.exit( 1 );  // Don't do this (InterruptedException). Let EDT end gracefully.
+			return;
+		}
+	}
+
+	private static void showErrorDialog( String message ) {
+		JOptionPane.showMessageDialog( null, message, "Error", JOptionPane.ERROR_MESSAGE );
+	}
+
+	private static class ExitException extends RuntimeException {
+		public ExitException() {
+		}
+
+		public ExitException( String message ) {
+			super( message );
+		}
+
+		public ExitException( Throwable cause ) {
+			super( cause );
+		}
+
+		public ExitException( String message, Throwable cause ) {
+			super( message, cause );
+		}
 	}
 }

src/main/java/net/vhati/modmanager/ui/ClipboardMenuMouseListener.java

@@ -0,0 +1,104 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Toolkit;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.event.ActionEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+import javax.swing.JMenuItem;
+import javax.swing.JPopupMenu;
+import javax.swing.text.JTextComponent;
+
+
+/**
+ * A Cut/Copy/Paste/SelectAll context menu for JTextComponents.
+ *
+ * Add this listener after any others. Any pressed/released listeners that want
+ * to preempt this menu should call e.consume().
+ */
+public class ClipboardMenuMouseListener extends MouseAdapter {
+
+	private JPopupMenu popup = new JPopupMenu();
+
+	private Action cutAction;
+	private Action copyAction;
+	private Action pasteAction;
+	private Action selectAllAction;
+
+	private JTextComponent textComponent = null;
+
+
+	public ClipboardMenuMouseListener() {
+		cutAction = new AbstractAction( "Cut" ) {
+			@Override
+			public void actionPerformed( ActionEvent ae ) {
+				textComponent.cut();
+			}
+		};
+		copyAction = new AbstractAction( "Copy" ) {
+			@Override
+			public void actionPerformed( ActionEvent ae ) {
+				textComponent.copy();
+			}
+		};
+		pasteAction = new AbstractAction( "Paste" ) {
+			@Override
+			public void actionPerformed( ActionEvent ae ) {
+				textComponent.paste();
+			}
+		};
+		selectAllAction = new AbstractAction( "Select All" ) {
+			@Override
+			public void actionPerformed( ActionEvent ae ) {
+				textComponent.selectAll();
+			}
+		};
+
+		popup.add( cutAction );
+		popup.add( copyAction );
+		popup.add( pasteAction );
+		popup.addSeparator();
+		popup.add( selectAllAction );
+	}
+
+
+	@Override
+	public void mousePressed( MouseEvent e ) {
+		if ( e.isConsumed() ) return;
+		if ( e.isPopupTrigger() ) showMenu( e );
+	}
+
+	@Override
+	public void mouseReleased( MouseEvent e ) {
+		if ( e.isConsumed() ) return;
+		if ( e.isPopupTrigger() ) showMenu( e );
+	}
+
+	public void showMenu( MouseEvent e ) {
+		if ( e.getSource() instanceof JTextComponent == false ) return;
+
+		textComponent = (JTextComponent)e.getSource();
+		textComponent.requestFocus();
+
+		boolean enabled = textComponent.isEnabled();
+		boolean editable = textComponent.isEditable();
+		boolean nonempty = !(textComponent.getText() == null || textComponent.getText().equals( "" ));
+		boolean marked = textComponent.getSelectedText() != null;
+
+		boolean pasteAvailable = Toolkit.getDefaultToolkit().getSystemClipboard().getContents( null ).isDataFlavorSupported( DataFlavor.stringFlavor );
+
+		cutAction.setEnabled( enabled && editable && marked );
+		copyAction.setEnabled( enabled && marked );
+		pasteAction.setEnabled( enabled && editable && pasteAvailable );
+		selectAllAction.setEnabled( enabled && nonempty );
+
+		int nx = e.getX();
+		if ( nx > 500 ) nx = nx - popup.getSize().width;
+
+		popup.show( e.getComponent(), nx, e.getY() - popup.getSize().height );
+
+		e.consume();
+	}
+}

src/main/java/net/vhati/modmanager/ui/CreateModDialog.java

@@ -0,0 +1,213 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.BorderLayout;
+import java.awt.Desktop;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import java.io.IOException;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextField;
+import javax.swing.ScrollPaneConstants;
+import javax.swing.event.AncestorEvent;
+import javax.swing.event.AncestorListener;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.vhati.modmanager.ui.FieldEditorPanel;
+import net.vhati.modmanager.ui.FieldEditorPanel.ContentType;
+import net.vhati.modmanager.ui.RegexDocument;
+import net.vhati.modmanager.xml.JDOMModMetadataWriter;
+
+
+public class CreateModDialog extends JDialog implements ActionListener {
+
+	private static final Logger log = LoggerFactory.getLogger( CreateModDialog.class );
+
+	protected static final String DIR_NAME = "Directory Name";
+	protected static final String AUDIO_ROOT = "audio/";
+	protected static final String DATA_ROOT = "data/";
+	protected static final String FONTS_ROOT = "fonts/";
+	protected static final String IMG_ROOT = "img/";
+	protected static final String XML_COMMENTS = "XML Comments";
+	protected static final String TITLE = "Title";
+	protected static final String URL = "Thread URL";
+	protected static final String AUTHOR = "Author";
+	protected static final String VERSION = "Version";
+	protected static final String DESC = "Description";
+
+	protected FieldEditorPanel editorPanel;
+	protected JButton applyBtn;
+
+	protected File modsDir;
+
+
+	public CreateModDialog( Frame owner, File modsDir ) {
+		super( owner, "New Mod" );
+		this.setDefaultCloseOperation( JDialog.DISPOSE_ON_CLOSE );
+
+		this.modsDir = modsDir;
+
+		editorPanel = new FieldEditorPanel( false );
+		editorPanel.setBorder( BorderFactory.createEmptyBorder( 10, 10, 0, 10 ) );
+		editorPanel.setNameWidth( 100 );
+		editorPanel.setValueWidth( 350 );
+
+		editorPanel.addRow( DIR_NAME, ContentType.STRING );
+		editorPanel.getString( DIR_NAME ).setDocument( new RegexDocument( "[^\\/:;*?<>|^\"]*" ) );
+		editorPanel.addTextRow( String.format( "The name of a directory to create in the %s/ folder.", modsDir.getName() ) );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( AUDIO_ROOT, ContentType.BOOLEAN );
+		editorPanel.addRow( DATA_ROOT, ContentType.BOOLEAN );
+		editorPanel.addRow( FONTS_ROOT, ContentType.BOOLEAN );
+		editorPanel.addRow( IMG_ROOT, ContentType.BOOLEAN );
+		editorPanel.getBoolean( AUDIO_ROOT ).setHorizontalAlignment( javax.swing.SwingConstants.LEFT );
+		editorPanel.getBoolean( DATA_ROOT ).setHorizontalAlignment( javax.swing.SwingConstants.LEFT );
+		editorPanel.getBoolean( FONTS_ROOT ).setHorizontalAlignment( javax.swing.SwingConstants.LEFT );
+		editorPanel.getBoolean( IMG_ROOT ).setHorizontalAlignment( javax.swing.SwingConstants.LEFT );
+		editorPanel.addTextRow( "Create empty top-level directories?" );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( XML_COMMENTS, ContentType.BOOLEAN );
+		editorPanel.getBoolean( XML_COMMENTS ).setHorizontalAlignment( javax.swing.SwingConstants.LEFT );
+		editorPanel.addTextRow( "Include XML comments about the purpose of these fields?" );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( TITLE, ContentType.STRING );
+		editorPanel.addTextRow( "The title of this mod." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( URL, ContentType.STRING );
+		editorPanel.addTextRow( "This mod's thread on the forum." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( AUTHOR, ContentType.STRING );
+		editorPanel.addTextRow( "Your forum user name." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( VERSION, ContentType.STRING );
+		editorPanel.addTextRow( "The revision/variant of this release, preferably at least a number." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( DESC, ContentType.TEXT_AREA );
+		editorPanel.getTextArea( DESC ).setRows( 15 );
+		editorPanel.addTextRow( "Summary of gameplay effects; flavor; features; concerns about compatibility, recommended patch order, requirements; replaced ship slot; etc." );
+
+		editorPanel.getBoolean( XML_COMMENTS ).setSelected( true );
+
+		JPanel ctrlPanel = new JPanel();
+		ctrlPanel.setLayout( new BoxLayout( ctrlPanel, BoxLayout.X_AXIS ) );
+		ctrlPanel.setBorder( BorderFactory.createEmptyBorder( 10, 0, 10, 0 ) );
+		ctrlPanel.add( Box.createHorizontalGlue() );
+		applyBtn = new JButton( "Generate Mod" );
+		applyBtn.addActionListener( this );
+		ctrlPanel.add( applyBtn );
+		ctrlPanel.add( Box.createHorizontalGlue() );
+
+		final JScrollPane editorScroll = new JScrollPane( editorPanel );
+		editorScroll.setVerticalScrollBarPolicy( ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS );
+		editorScroll.getVerticalScrollBar().setUnitIncrement( 10 );
+		int vbarWidth = editorScroll.getVerticalScrollBar().getPreferredSize().width;
+		editorScroll.setPreferredSize( new Dimension( editorPanel.getPreferredSize().width+vbarWidth+5, 400 ) );
+
+		JPanel contentPane = new JPanel( new BorderLayout() );
+		contentPane.add( editorScroll, BorderLayout.CENTER );
+		contentPane.add( ctrlPanel, BorderLayout.SOUTH );
+		this.setContentPane( contentPane );
+		this.pack();
+		this.setMinimumSize( new Dimension( 250, 250 ) );
+
+
+		editorScroll.addAncestorListener(new AncestorListener() {
+			@Override
+			public void ancestorAdded( AncestorEvent e ) {
+				editorScroll.getViewport().setViewPosition( new Point( 0, 0 ) );
+			}
+			@Override
+			public void ancestorMoved( AncestorEvent e ) {
+			}
+			@Override
+			public void ancestorRemoved( AncestorEvent e ) {
+			}
+		});
+	}
+
+	@Override
+	public void actionPerformed( ActionEvent e ) {
+		Object source = e.getSource();
+
+		if ( source == applyBtn ) {
+			String dirName = editorPanel.getString( DIR_NAME ).getText().trim();
+			String modTitle = editorPanel.getString( TITLE ).getText().trim();
+			String modURL = editorPanel.getString( URL ).getText().trim();
+			String modAuthor = editorPanel.getString( AUTHOR ).getText().trim();
+			String modVersion = editorPanel.getString( VERSION ).getText().trim();
+			String modDesc = editorPanel.getTextArea( DESC ).getText().trim();
+			boolean xmlComments = editorPanel.getBoolean( XML_COMMENTS ).isSelected();
+
+			if ( dirName.length() == 0 ) {
+				JOptionPane.showMessageDialog( CreateModDialog.this, "No directory name was given.", "Nothing to do", JOptionPane.WARNING_MESSAGE );
+				return;
+			}
+
+			File genDir = new File( modsDir, dirName );
+			if ( !genDir.exists() ) {
+				try {
+					// Generate the mod.
+					if ( genDir.mkdir() ) {
+						File appendixDir = new File ( genDir, "mod-appendix" );
+						if ( appendixDir.mkdir() ) {
+							File metadataFile = new File( appendixDir, "metadata.xml" );
+
+							JDOMModMetadataWriter.writeMetadata( metadataFile, modTitle, modURL, modAuthor, modVersion, modDesc, xmlComments );
+						}
+						else {
+							throw new IOException( String.format( "Failed to create directory: %s", appendixDir.getName() ) );
+						}
+					}
+					else {
+						throw new IOException( String.format( "Failed to create directory: %s", genDir.getName() ) );
+					}
+
+					// Create root dirs.
+					if ( editorPanel.getBoolean( AUDIO_ROOT ).isSelected() )
+						new File( genDir, "audio" ).mkdir();
+					if ( editorPanel.getBoolean( DATA_ROOT ).isSelected() )
+						new File( genDir, "data" ).mkdir();
+					if ( editorPanel.getBoolean( FONTS_ROOT ).isSelected() )
+						new File( genDir, "fonts" ).mkdir();
+					if ( editorPanel.getBoolean( IMG_ROOT ).isSelected() )
+						new File( genDir, "img" ).mkdir();
+
+					// Show the folder.
+					try {
+						if ( Desktop.isDesktopSupported() ) {
+							Desktop.getDesktop().open( genDir.getCanonicalFile() );
+						} else {
+							log.error( String.format( "Java cannot open the %s/ folder for you on this OS", genDir.getName() ) );
+						}
+					}
+					catch ( IOException f ) {
+						log.error( String.format( "Error opening %s/ folder", genDir.getName() ), f );
+					}
+
+					// All done.
+					CreateModDialog.this.dispose();
+				}
+				catch ( IOException f ) {
+					log.error( String.format( "Failed to generate new mod: %s", genDir.getName() ), f );
+
+					JOptionPane.showMessageDialog( CreateModDialog.this, String.format( "Failed to generate new mod: %s\n%s", genDir.getName(), f.getMessage() ), "Error", JOptionPane.ERROR_MESSAGE );
+				}
+			}
+			else {
+				JOptionPane.showMessageDialog( CreateModDialog.this, String.format( "A directory named \"%s\" already exists.", genDir.getName() ), "Nothing to do", JOptionPane.WARNING_MESSAGE );
+			}
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/DatExtractDialog.java

@@ -0,0 +1,163 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Frame;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.JDialog;
+import javax.swing.SwingUtilities;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.vhati.ftldat.AbstractPack;
+import net.vhati.ftldat.FolderPack;
+import net.vhati.ftldat.FTLPack;
+import net.vhati.ftldat.PkgPack;
+
+import net.vhati.modmanager.ui.ProgressDialog;
+
+
+public class DatExtractDialog extends ProgressDialog {
+
+	private static final Logger log = LoggerFactory.getLogger( DatExtractDialog.class );
+
+	private boolean started = false;
+
+	private File extractDir = null;
+	private File datsDir = null;
+
+	private DatExtractThread workerThread = null;
+
+
+	public DatExtractDialog( Frame owner, File extractDir, File datsDir ) {
+		super( owner, false );
+		this.setTitle( "Extracting..." );
+
+		this.extractDir = extractDir;
+		this.datsDir = datsDir;
+
+		this.setSize( 400, 160 );
+		this.setMinimumSize( this.getPreferredSize() );
+		this.setLocationRelativeTo( owner );
+
+		workerThread = new DatExtractThread( extractDir, datsDir );
+	}
+
+	/**
+	 * Returns the worker thread that does the extracting.
+	 *
+	 * This method is provided so other classes can customize the thread
+	 * before calling extract().
+	 */
+	public Thread getWorkerThread() {
+		return workerThread;
+	}
+
+	/**
+	 * Starts the background extraction thread.
+	 * Call this immediately before setVisible().
+	 */
+	public void extract() {
+		if ( started ) return;
+
+		workerThread.start();
+		started = true;
+	}
+
+	@Override
+	protected void setTaskOutcome( boolean outcome, Exception e ) {
+		super.setTaskOutcome( outcome, e );
+		if ( !this.isShowing() ) return;
+
+		if ( succeeded ) {
+			setStatusText( "All resources extracted successfully." );
+		} else {
+			setStatusText( String.format( "Error extracting dats: %s", e ) );
+		}
+	}
+
+
+
+	private class DatExtractThread extends Thread {
+
+		private File extractDir = null;
+		private File datsDir = null;
+
+
+		public DatExtractThread( File extractDir, File datsDir ) {
+			this.extractDir = extractDir;
+			this.datsDir = datsDir;
+		}
+
+		@Override
+		public void run() {
+			AbstractPack dstPack = null;
+			List<AbstractPack> srcPacks = new ArrayList<AbstractPack>( 2 );
+			InputStream is = null;
+			int progress = 0;
+
+			try {
+				File ftlDatFile = new File( datsDir, "ftl.dat" );
+				File dataDatFile = new File( datsDir, "data.dat" );
+				File resourceDatFile = new File( datsDir, "resource.dat" );
+
+				if ( ftlDatFile.exists() ) {  // FTL 1.6.1.
+					AbstractPack ftlPack = new PkgPack( ftlDatFile, "r" );
+					srcPacks.add( ftlPack );
+				}
+				else if ( dataDatFile.exists() && resourceDatFile.exists() ) {  // FTL 1.01-1.5.13.
+					AbstractPack dataPack = new FTLPack( dataDatFile, "r" );
+					AbstractPack resourcePack = new FTLPack( resourceDatFile, "r" );
+					srcPacks.add( dataPack );
+					srcPacks.add( resourcePack );
+				}
+				else {
+					throw new FileNotFoundException( String.format( "Could not find either \"%s\" or both \"%s\" and \"%s\"", ftlDatFile.getName(), dataDatFile.getName(), resourceDatFile.getName() ) );
+				}
+
+				if ( !extractDir.exists() ) extractDir.mkdirs();
+
+				dstPack = new FolderPack( extractDir );
+
+				for ( AbstractPack srcPack : srcPacks ) {
+					progress = 0;
+					List<String> innerPaths = srcPack.list();
+					setProgressLater( progress, innerPaths.size() );
+
+					for ( String innerPath : innerPaths ) {
+						setStatusTextLater( innerPath );
+						if ( dstPack.contains( innerPath ) ) {
+							log.info( "While extracting resources, this file was overwritten: "+ innerPath );
+							dstPack.remove( innerPath );
+						}
+						is = srcPack.getInputStream( innerPath );
+						dstPack.add( innerPath, is );
+						setProgressLater( progress++ );
+					}
+					srcPack.close();
+				}
+				setTaskOutcomeLater( true, null );
+			}
+			catch ( Exception e ) {
+				log.error( "Error extracting dats", e );
+				setTaskOutcomeLater( false, e );
+			}
+			finally {
+				try {if ( is != null ) is.close();}
+				catch ( IOException e ) {}
+
+				try {if ( dstPack != null ) dstPack.close();}
+				catch ( IOException e ) {}
+
+				for ( AbstractPack pack : srcPacks ) {
+					try {pack.close();}
+					catch ( IOException ex ) {}
+				}
+			}
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/FieldEditorPanel.java

@@ -0,0 +1,457 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.util.HashMap;
+import java.util.Map;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSeparator;
+import javax.swing.JSlider;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+import javax.swing.SwingConstants;
+import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
+import net.vhati.modmanager.ui.RegexDocument;
+
+
+public class FieldEditorPanel extends JPanel {
+	public enum ContentType { WRAPPED_LABEL, LABEL, STRING, TEXT_AREA, INTEGER, BOOLEAN, SLIDER, COMBO, CHOOSER }
+
+	private Map<String, JTextArea> wrappedLabelMap = new HashMap<String, JTextArea>();
+	private Map<String, JLabel> labelMap = new HashMap<String, JLabel>();
+	private Map<String, JTextField> stringMap = new HashMap<String, JTextField>();
+	private Map<String, JTextArea> textAreaMap = new HashMap<String, JTextArea>();
+	private Map<String, JTextField> intMap = new HashMap<String, JTextField>();
+	private Map<String, JCheckBox> boolMap = new HashMap<String, JCheckBox>();
+	private Map<String, JSlider> sliderMap = new HashMap<String, JSlider>();
+	private Map<String, JComboBox> comboMap = new HashMap<String, JComboBox>();
+	private Map<String, Chooser> chooserMap = new HashMap<String, Chooser>();
+	private Map<String, JLabel> reminderMap = new HashMap<String, JLabel>();
+
+	private GridBagConstraints gridC = new GridBagConstraints();
+
+	private Component nameStrut = Box.createHorizontalStrut( 1 );
+	private Component valueStrut = Box.createHorizontalStrut( 120 );
+	private Component reminderStrut = Box.createHorizontalStrut( 90 );
+
+	private boolean remindersVisible;
+
+
+	public FieldEditorPanel( boolean remindersVisible ) {
+		super( new GridBagLayout() );
+		this.remindersVisible = remindersVisible;
+
+		gridC.anchor = GridBagConstraints.WEST;
+		gridC.fill = GridBagConstraints.HORIZONTAL;
+		gridC.weightx = 0.0;
+		gridC.weighty = 0.0;
+		gridC.gridwidth = 1;
+		gridC.gridx = 0;
+		gridC.gridy = 0;
+
+		// No default width for col 0.
+		gridC.gridx = 0;
+		this.add( nameStrut, gridC );
+		gridC.gridx++;
+		this.add( valueStrut, gridC );
+		gridC.gridx++;
+		if ( remindersVisible ) {
+			this.add( reminderStrut, gridC );
+			gridC.gridy++;
+		}
+
+		gridC.insets = new Insets( 2, 4, 2, 4 );
+	}
+
+
+	public void setNameWidth( int width ) {
+		nameStrut.setMinimumSize( new Dimension( width, 0 ) );
+		nameStrut.setPreferredSize( new Dimension( width, 0 ) );
+	}
+
+	public void setValueWidth( int width ) {
+		valueStrut.setMinimumSize( new Dimension( width, 0 ) );
+		valueStrut.setPreferredSize( new Dimension( width, 0 ) );
+	}
+
+	public void setReminderWidth( int width ) {
+		reminderStrut.setMinimumSize( new Dimension( width, 0 ) );
+		reminderStrut.setPreferredSize( new Dimension( width, 0 ) );
+	}
+
+
+	/**
+	 * Constructs JComponents for a given type of value.
+	 * A row consists of a static label, some JComponent,
+	 * and a reminder label.
+	 *
+	 * The component and reminder will be accessable later
+	 * via getter methods.
+	 */
+	public void addRow( String valueName, ContentType contentType ) {
+		gridC.fill = GridBagConstraints.HORIZONTAL;
+		gridC.gridwidth = 1;
+		gridC.weighty = 0.0;
+		gridC.gridx = 0;
+		this.add( new JLabel( valueName +":" ), gridC );
+
+		gridC.gridx++;
+		if ( contentType == ContentType.WRAPPED_LABEL ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JTextArea valueArea = new JTextArea();
+			valueArea.setBackground( null );
+			valueArea.setEditable( false );
+			valueArea.setBorder( null );
+			valueArea.setLineWrap( true );
+			valueArea.setWrapStyleWord( true );
+			valueArea.setFocusable( false );
+			valueArea.setFont( UIManager.getFont( "Label.font" ) );
+
+			wrappedLabelMap.put( valueName, valueArea );
+			this.add( valueArea, gridC );
+		}
+		else if ( contentType == ContentType.LABEL ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JLabel valueLbl = new JLabel();
+			valueLbl.setHorizontalAlignment( SwingConstants.CENTER );
+			labelMap.put( valueName, valueLbl );
+			this.add( valueLbl, gridC );
+		}
+		else if ( contentType == ContentType.STRING ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JTextField valueField = new JTextField();
+			stringMap.put( valueName, valueField );
+			this.add( valueField, gridC );
+		}
+		else if ( contentType == ContentType.TEXT_AREA ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JTextArea valueArea = new JTextArea();
+			valueArea.setEditable( true );
+			valueArea.setBorder( BorderFactory.createCompoundBorder( BorderFactory.createEtchedBorder(), BorderFactory.createEmptyBorder( 2, 2, 2, 2 ) ) );
+			valueArea.setLineWrap( true );
+			valueArea.setWrapStyleWord( true );
+			valueArea.setFocusable( true );
+			valueArea.setFont( UIManager.getFont( "TextField.font" ) );  // Override small default font on systemLaf.
+
+			textAreaMap.put( valueName, valueArea );
+			this.add( valueArea, gridC );
+		}
+		else if ( contentType == ContentType.INTEGER ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JTextField valueField = new JTextField();
+			valueField.setHorizontalAlignment( JTextField.RIGHT );
+			valueField.setDocument( new RegexDocument( "[0-9]*" ) );
+			intMap.put( valueName, valueField );
+			this.add( valueField, gridC );
+		}
+		else if ( contentType == ContentType.BOOLEAN ) {
+			gridC.anchor = GridBagConstraints.CENTER;
+			JCheckBox valueCheck = new JCheckBox();
+			valueCheck.setHorizontalAlignment( SwingConstants.CENTER );
+			boolMap.put( valueName, valueCheck );
+			this.add( valueCheck, gridC );
+		}
+		else if ( contentType == ContentType.SLIDER ) {
+			gridC.anchor = GridBagConstraints.CENTER;
+			JPanel panel = new JPanel();
+			panel.setLayout( new BoxLayout( panel, BoxLayout.X_AXIS ) );
+			final JSlider valueSlider = new JSlider( JSlider.HORIZONTAL );
+			valueSlider.setPreferredSize( new Dimension( 50, valueSlider.getPreferredSize().height ) );
+			sliderMap.put( valueName, valueSlider );
+			panel.add( valueSlider );
+			final JTextField valueField = new JTextField( 3 );
+			valueField.setMaximumSize( valueField.getPreferredSize() );
+			valueField.setHorizontalAlignment( JTextField.RIGHT );
+			valueField.setEditable( false );
+			panel.add( valueField );
+			this.add( panel, gridC );
+
+			valueSlider.addChangeListener(new ChangeListener() {
+				@Override
+				public void stateChanged( ChangeEvent e ) {
+					valueField.setText( ""+valueSlider.getValue() );
+				}
+			});
+		}
+		else if ( contentType == ContentType.COMBO ) {
+			gridC.anchor = GridBagConstraints.CENTER;
+			JComboBox valueCombo = new JComboBox();
+			valueCombo.setEditable( false );
+			comboMap.put( valueName, valueCombo );
+			this.add( valueCombo, gridC );
+		}
+		else if ( contentType == ContentType.CHOOSER ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JPanel panel = new JPanel();
+			panel.setLayout( new BoxLayout( panel, BoxLayout.X_AXIS ) );
+
+			JTextField chooserField = new JTextField();
+			panel.add( chooserField );
+			panel.add( Box.createHorizontalStrut( 5 ) );
+			JButton chooserBtn = new JButton( "..." );
+			chooserBtn.setMargin( new Insets( 1,2,1,2 ) );
+			panel.add( chooserBtn );
+			Chooser valueChooser = new Chooser( chooserField, chooserBtn );
+			chooserMap.put( valueName, valueChooser );
+
+			this.add( panel, gridC );
+		}
+		gridC.gridx++;
+
+		if ( remindersVisible ) {
+			gridC.anchor = GridBagConstraints.WEST;
+			JLabel valueReminder = new JLabel();
+			reminderMap.put( valueName, valueReminder );
+			this.add( valueReminder, gridC );
+		}
+
+		gridC.gridy++;
+	}
+
+	public void addTextRow( String text ) {
+		gridC.fill = GridBagConstraints.HORIZONTAL;
+		gridC.weighty = 0.0;
+		gridC.gridwidth = GridBagConstraints.REMAINDER;
+		gridC.gridx = 0;
+
+		gridC.anchor = GridBagConstraints.WEST;
+		JTextArea textArea = new JTextArea( text );
+		textArea.setBackground( null );
+		textArea.setEditable( false );
+		textArea.setBorder( null );
+		textArea.setLineWrap( true );
+		textArea.setWrapStyleWord( true );
+		textArea.setFocusable( false );
+		textArea.setFont( UIManager.getFont( "Label.font" ) );
+
+		this.add( textArea, gridC );
+		gridC.gridy++;
+	}
+
+	public void addSeparatorRow() {
+		gridC.fill = GridBagConstraints.HORIZONTAL;
+		gridC.weighty = 0.0;
+		gridC.gridwidth = GridBagConstraints.REMAINDER;
+		gridC.gridx = 0;
+
+		JPanel panel = new JPanel();
+		panel.setLayout( new BoxLayout( panel, BoxLayout.Y_AXIS ) );
+		panel.add( Box.createVerticalStrut( 8 ) );
+		JSeparator sep = new JSeparator();
+		sep.setPreferredSize( new Dimension( 1, sep.getPreferredSize().height ) );
+		panel.add( sep );
+		panel.add( Box.createVerticalStrut( 8 ) );
+
+		this.add( panel, gridC );
+		gridC.gridy++;
+	}
+
+	public void addBlankRow() {
+		gridC.fill = GridBagConstraints.NONE;
+		gridC.weighty = 0.0;
+		gridC.gridwidth = GridBagConstraints.REMAINDER;
+		gridC.gridx = 0;
+
+		this.add( Box.createVerticalStrut( 12 ), gridC );
+		gridC.gridy++;
+	}
+
+	public void addFillRow() {
+		gridC.fill = GridBagConstraints.VERTICAL;
+		gridC.weighty = 1.0;
+		gridC.gridwidth = GridBagConstraints.REMAINDER;
+		gridC.gridx = 0;
+
+		this.add( Box.createVerticalGlue(), gridC );
+		gridC.gridy++;
+	}
+
+
+	public void setStringAndReminder( String valueName, String s ) {
+		JTextField valueField = stringMap.get( valueName );
+		if ( valueField != null ) valueField.setText( s );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setIntAndReminder( String valueName, int n ) {
+		setIntAndReminder( valueName, n, ""+n );
+	}
+	public void setIntAndReminder( String valueName, int n, String s ) {
+		JTextField valueField = intMap.get( valueName );
+		if ( valueField != null ) valueField.setText( ""+n );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setBoolAndReminder( String valueName, boolean b ) {
+		setBoolAndReminder( valueName, b, ""+b );
+	}
+	public void setBoolAndReminder( String valueName, boolean b, String s ) {
+		JCheckBox valueCheck = boolMap.get( valueName );
+		if ( valueCheck != null ) valueCheck.setSelected( b );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setSliderAndReminder( String valueName, int n ) {
+		setSliderAndReminder( valueName, n, ""+n );
+	}
+	public void setSliderAndReminder( String valueName, int n, String s ) {
+		JSlider valueSlider = sliderMap.get( valueName );
+		if ( valueSlider != null ) valueSlider.setValue( n );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setComboAndReminder( String valueName, Object o ) {
+		setComboAndReminder( valueName, o, o.toString() );
+	}
+	public void setComboAndReminder( String valueName, Object o, String s ) {
+		JComboBox valueCombo = comboMap.get( valueName );
+		if ( valueCombo != null ) valueCombo.setSelectedItem( o );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setChooserAndReminder( String valueName, String s ) {
+		Chooser valueChooser = chooserMap.get( valueName );
+		if ( valueChooser != null ) valueChooser.getTextField().setText( s );
+		if ( remindersVisible ) setReminder( valueName, s );
+	}
+
+	public void setReminder( String valueName, String s ) {
+		JLabel valueReminder = reminderMap.get( valueName );
+		if ( valueReminder != null ) valueReminder.setText( "( "+ s +" )" );
+	}
+
+	public JTextArea getWrappedLabel( String valueName ) {
+		return wrappedLabelMap.get( valueName );
+	}
+
+	public JLabel getLabel( String valueName ) {
+		return labelMap.get( valueName );
+	}
+
+	public JTextField getString( String valueName ) {
+		return stringMap.get( valueName );
+	}
+
+	public JTextArea getTextArea( String valueName ) {
+		return textAreaMap.get( valueName );
+	}
+
+	public JTextField getInt( String valueName ) {
+		return intMap.get( valueName );
+	}
+
+	public JCheckBox getBoolean( String valueName ) {
+		return boolMap.get( valueName );
+	}
+
+	public JSlider getSlider( String valueName ) {
+		return sliderMap.get( valueName );
+	}
+
+	public JComboBox getCombo( String valueName ) {
+		return comboMap.get( valueName );
+	}
+
+	public Chooser getChooser( String valueName ) {
+		return chooserMap.get( valueName );
+	}
+
+
+	public void reset() {
+		for ( JTextArea valueArea : wrappedLabelMap.values() )
+			valueArea.setText( "" );
+
+		for ( JLabel valueLbl : labelMap.values() )
+			valueLbl.setText( "" );
+
+		for ( JTextField valueField : stringMap.values() )
+			valueField.setText( "" );
+
+		for ( JTextArea valueArea : textAreaMap.values() )
+			valueArea.setText( "" );
+
+		for ( JTextField valueField : intMap.values() )
+			valueField.setText( "" );
+
+		for ( JCheckBox valueCheck : boolMap.values() )
+			valueCheck.setSelected( false );
+
+		for ( JSlider valueSlider : sliderMap.values() )
+			valueSlider.setValue( 0 );
+
+		for ( JComboBox valueCombo : comboMap.values() )
+			valueCombo.removeAllItems();
+
+		for ( Chooser valueChooser : chooserMap.values() )
+			valueChooser.getTextField().setText( "" );
+
+		for ( JLabel valueReminder : reminderMap.values() )
+			valueReminder.setText( "" );
+	}
+
+	@Override
+	public void removeAll() {
+		wrappedLabelMap.clear();
+		labelMap.clear();
+		stringMap.clear();
+		textAreaMap.clear();
+		intMap.clear();
+		boolMap.clear();
+		sliderMap.clear();
+		comboMap.clear();
+		chooserMap.clear();
+		reminderMap.clear();
+		super.removeAll();
+		gridC = new GridBagConstraints();
+
+		gridC.anchor = GridBagConstraints.WEST;
+		gridC.fill = GridBagConstraints.HORIZONTAL;
+		gridC.weightx = 0.0;
+		gridC.weighty = 0.0;
+		gridC.gridwidth = 1;
+		gridC.gridx = 0;
+		gridC.gridy = 0;
+
+		// No default width for col 0.
+		gridC.gridx = 0;
+		this.add( Box.createVerticalStrut( 1 ), gridC );
+		gridC.gridx++;
+		this.add( valueStrut, gridC );
+		gridC.gridx++;
+		if ( remindersVisible ) {
+			this.add( reminderStrut, gridC );
+			gridC.gridy++;
+		}
+
+		gridC.insets = new Insets( 2, 4, 2, 4 );
+	}
+
+
+
+	public static class Chooser {
+		private JTextField textField;
+		private JButton button;
+
+		public Chooser( JTextField textField, JButton button ) {
+			this.textField = textField;
+			this.button = button;
+		}
+
+		public JTextField getTextField() { return textField; }
+		public JButton getButton() { return button; }
+	}
+}

src/main/java/net/vhati/modmanager/ui/InertPanel.java

@@ -0,0 +1,62 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Component;
+import java.awt.Cursor;
+import java.awt.KeyEventDispatcher;
+import java.awt.KeyboardFocusManager;
+import java.awt.Window;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.SwingUtilities;
+
+
+/**
+ * A panel that consumes all mouse/keyboard events, for use as a glass pane.
+ */
+public class InertPanel extends JPanel {
+
+	private KeyEventDispatcher nullDispatcher;
+
+
+	public InertPanel() {
+		super();
+
+		nullDispatcher = new KeyEventDispatcher() {
+			@Override
+			public boolean dispatchKeyEvent( KeyEvent e ) {
+				Object source = e.getSource();
+				if ( source instanceof Component == false ) return false;
+
+				Window ancestor = SwingUtilities.getWindowAncestor( (Component)source );
+				if ( ancestor instanceof JFrame == false ) return false;
+
+				return ( InertPanel.this == ((JFrame)ancestor).getGlassPane() );
+			}
+		};
+
+    this.addMouseListener(new MouseAdapter() {
+			@Override
+      public void mousePressed( MouseEvent e ) {e.consume();}
+			@Override
+      public void mouseReleased( MouseEvent e ) {e.consume();}
+    });
+
+		this.setCursor(Cursor.getPredefinedCursor( Cursor.WAIT_CURSOR ));
+		this.setOpaque( false );
+	}
+
+
+	@Override
+	public void setVisible( boolean b ) {
+		super.setVisible( b );
+		if ( b ) {
+			KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher( nullDispatcher );
+		} else {
+			KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventDispatcher( nullDispatcher );
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/ManagerInitThread.java

@@ -0,0 +1,243 @@
+package net.vhati.modmanager.ui;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.List;
+import java.util.concurrent.locks.Lock;
+import javax.swing.SwingUtilities;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.vhati.modmanager.core.AutoUpdateInfo;
+import net.vhati.modmanager.core.ModDB;
+import net.vhati.modmanager.core.ModFileInfo;
+import net.vhati.modmanager.core.SlipstreamConfig;
+import net.vhati.modmanager.json.JacksonAutoUpdateReader;
+import net.vhati.modmanager.json.JacksonCatalogReader;
+import net.vhati.modmanager.json.URLFetcher;
+import net.vhati.modmanager.ui.ManagerFrame;
+import net.vhati.modmanager.ui.table.ListState;
+
+
+/**
+ * Performs I/O-related setup for ManagerFrame in the background.
+ *
+ * Reads cached local metadata.
+ * Rescans the "mods/" folder.
+ * Reads saved catalog, and redownloads if stale.
+ * Reads saved info about app updates, and redownloads if stale.
+ */
+public class ManagerInitThread extends Thread {
+
+	private static final Logger log = LoggerFactory.getLogger( ManagerInitThread.class );
+
+	private final ManagerFrame frame;
+	private final SlipstreamConfig appConfig;
+	private final File modsDir;
+	private final File modsTableStateFile;
+	private final File metadataFile;
+	private final File catalogFile;
+	private final File catalogETagFile;
+	private final File appUpdateFile;
+	private final File appUpdateETagFile;
+
+
+	public ManagerInitThread( ManagerFrame frame, SlipstreamConfig appConfig, File modsDir, File modsTableStateFile, File metadataFile, File catalogFile, File catalogETagFile, File appUpdateFile, File appUpdateETagFile ) {
+		super( "init" );
+		this.frame = frame;
+		this.appConfig = appConfig;
+		this.modsDir = modsDir;
+		this.modsTableStateFile = modsTableStateFile;
+		this.metadataFile = metadataFile;
+		this.catalogFile = catalogFile;
+		this.catalogETagFile = catalogETagFile;
+		this.appUpdateFile = appUpdateFile;
+		this.appUpdateETagFile = appUpdateETagFile;
+	}
+
+
+	@Override
+	public void run() {
+		try {
+			init();
+		}
+		catch ( Exception e ) {
+			log.error( "Error during ManagerFrame init.", e );
+		}
+	}
+
+
+	private void init() throws InterruptedException {
+
+		if ( metadataFile.exists() ) {
+			// Load cached metadata first, before scanning for new info.
+			ModDB cachedDB = JacksonCatalogReader.parse( metadataFile );
+			if ( cachedDB != null ) frame.setLocalModDB( cachedDB );
+		}
+
+		final ListState<ModFileInfo> tableState = loadModsTableState();
+
+		Lock managerLock = frame.getLock();
+		managerLock.lock();
+		try {
+			SwingUtilities.invokeLater(new Runnable() {
+				@Override
+				public void run() { frame.rescanMods( tableState ); }
+			});
+
+			// Wait until notified that "mods/" has been scanned.
+			while ( frame.isScanning() ) {
+				frame.getScanEndedCondition().await();
+			}
+		}
+		finally {
+			managerLock.unlock();
+		}
+
+		int catalogUpdateInterval = appConfig.getPropertyAsInt( "update_catalog", 0 );
+		boolean needNewCatalog = false;
+
+		// Load the catalog first, before downloading.
+		if ( catalogFile.exists() )  reloadCatalog();
+
+		if ( catalogUpdateInterval > 0 ) {
+			if ( catalogFile.exists() ) {
+				// Check if the downloaded catalog is stale.
+				if ( isFileStale( catalogFile, catalogUpdateInterval ) ) {
+					log.debug( String.format( "Catalog is older than %d days", catalogUpdateInterval ) );
+					needNewCatalog = true;
+				} else {
+					log.debug( "Catalog isn't stale yet" );
+				}
+			}
+			else {
+				// Catalog file doesn't exist.
+				needNewCatalog = true;
+			}
+		}
+
+		if ( needNewCatalog ) {
+			boolean fetched = URLFetcher.refetchURL( ManagerFrame.CATALOG_URL, catalogFile, catalogETagFile );
+			if ( fetched && catalogFile.exists() ) {
+				reloadCatalog();
+			}
+		}
+
+		// Load the cached info first, before downloading.
+		if ( appUpdateFile.exists() ) reloadAppUpdateInfo();
+
+		int appUpdateInterval = appConfig.getPropertyAsInt( SlipstreamConfig.UPDATE_APP, 0 );
+		boolean needAppUpdate = false;
+
+		if ( appUpdateInterval > 0 ) {
+			if ( appUpdateFile.exists() ) {
+				// Check if the app update info is stale.
+				if ( isFileStale( appUpdateFile, appUpdateInterval ) ) {
+					log.debug( String.format( "App update info is older than %d days", appUpdateInterval ) );
+					needAppUpdate = true;
+				} else {
+					log.debug( "App update info isn't stale yet" );
+				}
+			}
+			else {
+				// App update file doesn't exist.
+				needAppUpdate = true;
+			}
+		}
+
+		if ( needAppUpdate ) {
+			boolean fetched = URLFetcher.refetchURL( ManagerFrame.APP_UPDATE_URL, appUpdateFile, appUpdateETagFile );
+			if ( fetched && appUpdateFile.exists() ) {
+				reloadAppUpdateInfo();
+			}
+		}
+	}
+
+
+	/**
+	 * Reads modorder.txt and returns a list of mod names in preferred order.
+	 */
+	private ListState<ModFileInfo> loadModsTableState() {
+		List<String> fileNames = new ArrayList<String>();
+
+		BufferedReader br = null;
+		try {
+			FileInputStream is = new FileInputStream( modsTableStateFile );
+			br = new BufferedReader( new InputStreamReader( is, Charset.forName( "UTF-8" ) ) );
+			String line;
+			while ( (line = br.readLine()) != null ) {
+				fileNames.add( line );
+			}
+		}
+		catch ( FileNotFoundException e ) {
+		}
+		catch ( IOException e ) {
+			log.error( String.format( "Error reading \"%s\"", modsTableStateFile.getName() ), e );
+			fileNames.clear();
+		}
+		finally {
+			try {if ( br != null ) br.close();}
+			catch ( Exception e ) {}
+		}
+
+		ListState<ModFileInfo> result = new ListState<ModFileInfo>();
+
+		for ( String fileName : fileNames ) {
+			File modFile = new File( modsDir, fileName );
+			ModFileInfo modFileInfo = new ModFileInfo( modFile );
+			result.addItem( modFileInfo );
+		}
+
+		return result;
+	}
+
+
+	private void reloadCatalog() {
+		final ModDB currentDB = JacksonCatalogReader.parse( catalogFile );
+		if ( currentDB != null ) {
+			SwingUtilities.invokeLater(new Runnable() {
+				@Override
+				public void run() {
+					frame.setCatalogModDB( currentDB );
+				}
+			});
+		}
+	}
+
+	private void reloadAppUpdateInfo() {
+		final AutoUpdateInfo aui = JacksonAutoUpdateReader.parse( appUpdateFile );
+		if ( aui != null ) {
+			SwingUtilities.invokeLater(new Runnable() {
+				@Override
+				public void run() {
+					frame.setAppUpdateInfo( aui );
+				}
+			});
+		}
+	}
+
+
+	/**
+	 * Returns true if a file is older than N days.
+	 */
+	private boolean isFileStale( File f, int maxDays ) {
+		Calendar fileCal = Calendar.getInstance();
+		fileCal.setTimeInMillis( f.lastModified() );
+		fileCal.getTimeInMillis();  // Re-calculate calendar fields.
+
+		Calendar freshCal = Calendar.getInstance();
+		freshCal.add( Calendar.DATE, maxDays * -1 );
+		freshCal.getTimeInMillis();  // Re-calculate calendar fields.
+
+		return (fileCal.compareTo( freshCal ) < 0);
+	}
+}

src/main/java/net/vhati/modmanager/ui/ModInfoArea.java

@@ -0,0 +1,277 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Color;
+import java.awt.Cursor;
+import java.awt.Desktop;
+import java.awt.Font;
+import java.awt.Toolkit;
+import java.awt.datatransfer.StringSelection;
+import java.awt.event.ActionEvent;
+import java.awt.event.MouseEvent;
+import java.net.URI;
+import javax.swing.AbstractAction;
+import javax.swing.JPopupMenu;
+import javax.swing.JScrollPane;
+import javax.swing.JTextPane;
+import javax.swing.SwingUtilities;
+import javax.swing.event.MouseInputAdapter;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.DefaultStyledDocument;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.Style;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyleContext;
+import javax.swing.text.StyledDocument;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.vhati.modmanager.ui.Statusbar;
+
+
+public class ModInfoArea extends JScrollPane {
+
+	private static final Logger log = LoggerFactory.getLogger( ModInfoArea.class );
+
+	private static final String STYLE_REGULAR = "regular";
+	private static final String STYLE_HYPERLINK = "hyperlink";
+	private static final String STYLE_TITLE = "title";
+	private static final String ATTR_HYPERLINK_TARGET = "hyperlink-target";
+
+	public static Color COLOR_HYPER = Color.BLUE;
+	public static final StyleContext DEFAULT_STYLES = ModInfoArea.getDefaultStyleContext();
+
+	private JPopupMenu linkPopup = new JPopupMenu();
+
+	private Statusbar statusbar = null;
+	private String lastClickedLinkTarget = null;
+
+	private JTextPane textPane;
+	private StyledDocument doc;
+	private boolean browseWorks;
+
+
+	public ModInfoArea() {
+		this( DEFAULT_STYLES );
+	}
+
+	public ModInfoArea( StyleContext styleContext ) {
+		super();
+
+		textPane = new JTextPane();
+		textPane.setEditable( false );
+
+		doc = new DefaultStyledDocument( styleContext );
+		textPane.setStyledDocument( doc );
+
+		Desktop desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
+		if ( desktop != null && desktop.isSupported( Desktop.Action.BROWSE ) ) {
+			browseWorks = true;
+		}
+
+		linkPopup.add( new AbstractAction( "Copy link address" ) {
+			@Override
+			public void actionPerformed( ActionEvent ae ) {
+				if ( lastClickedLinkTarget != null ) {
+					Toolkit.getDefaultToolkit().getSystemClipboard().setContents( new StringSelection( lastClickedLinkTarget ), null );
+				}
+			}
+		});
+
+		MouseInputAdapter hyperlinkListener = new MouseInputAdapter() {
+			private Cursor defaultCursor = new Cursor( Cursor.DEFAULT_CURSOR );
+			private Cursor linkCursor = new Cursor( Cursor.HAND_CURSOR );
+			private boolean wasOverLink = false;
+
+			@Override
+			public void mousePressed( MouseEvent e ) {
+				if ( e.isConsumed() ) return;
+				if ( e.isPopupTrigger() ) showMenu( e );
+			}
+
+			@Override
+			public void mouseReleased( MouseEvent e ) {
+				if ( e.isConsumed() ) return;
+				if ( e.isPopupTrigger() ) showMenu( e );
+			}
+
+			@Override
+			public void mouseClicked( MouseEvent e ) {
+				if ( e.isConsumed() ) return;
+				if ( !SwingUtilities.isLeftMouseButton( e ) ) return;
+
+				AttributeSet tmpAttr = doc.getCharacterElement( textPane.viewToModel( e.getPoint() ) ).getAttributes();
+				Object targetObj = tmpAttr.getAttribute( ATTR_HYPERLINK_TARGET );
+				if ( targetObj != null ) {
+					Desktop desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
+					if ( desktop != null && desktop.isSupported( Desktop.Action.BROWSE ) ) {
+						try {
+							desktop.browse( new URI( targetObj.toString() ) );
+						}
+						catch ( Exception f ) {
+							log.error( "Error browsing clicked url: "+ targetObj.toString(), f );
+						}
+					}
+					e.consume();
+				}
+			}
+
+			@Override
+			public void mouseMoved( MouseEvent e ) {
+				AttributeSet tmpAttr = doc.getCharacterElement( textPane.viewToModel( e.getPoint() ) ).getAttributes();
+				Object targetObj = tmpAttr.getAttribute( ATTR_HYPERLINK_TARGET );
+				if ( targetObj != null ) {
+					textPane.setCursor( linkCursor );
+					if ( statusbar != null )
+						statusbar.setStatusText( targetObj.toString() );
+					wasOverLink = true;
+				}
+				else {
+					if ( wasOverLink ) {
+						textPane.setCursor( defaultCursor );
+						if ( statusbar != null )
+							statusbar.setStatusText( "" );
+					}
+					wasOverLink = false;
+				}
+			}
+
+			private void showMenu( MouseEvent e ) {
+				AttributeSet tmpAttr = doc.getCharacterElement( textPane.viewToModel( e.getPoint() ) ).getAttributes();
+				Object targetObj = tmpAttr.getAttribute( ATTR_HYPERLINK_TARGET );
+				if ( targetObj != null ) {  // Link menu.
+					textPane.requestFocus();
+
+					lastClickedLinkTarget = targetObj.toString();
+
+					int nx = e.getX();
+					if ( nx > 500 ) nx = nx - linkPopup.getSize().width;
+
+					linkPopup.show( e.getComponent(), nx, e.getY() - linkPopup.getSize().height );
+
+					e.consume();
+				}
+			}
+		};
+		textPane.addMouseListener( hyperlinkListener );
+		textPane.addMouseMotionListener( hyperlinkListener );
+
+		textPane.addMouseListener( new ClipboardMenuMouseListener() );
+
+		this.setViewportView( textPane );
+	}
+
+
+	public void setDescription( String title, String body ) {
+		setDescription( title, null, null, null, body );
+	}
+
+	public void setDescription( String title, String author, String version, String url, String body ) {
+		Style regularStyle = doc.getStyle( STYLE_REGULAR );
+		try {
+			doc.remove( 0, doc.getLength() );
+			doc.insertString( doc.getLength(), title +"\n", doc.getStyle( STYLE_TITLE ) );
+
+			boolean first = true;
+			if ( author != null ) {
+				doc.insertString( doc.getLength(), String.format( "%sby %s", (first ? "" : " "), author ), regularStyle );
+				first = false;
+			}
+			if ( version != null ) {
+				doc.insertString( doc.getLength(), String.format( "%s(version %s)", (first ? "" : " "), version ), regularStyle );
+				first = false;
+			}
+			if ( !first ) {
+				doc.insertString( doc.getLength(), "\n", regularStyle );
+			}
+
+			if ( url != null ) {
+				doc.insertString( doc.getLength(), "Website: ", regularStyle );
+
+				if ( browseWorks && url.matches( "^(?:https?|ftp)://.*" ) ) {
+					SimpleAttributeSet tmpAttr = new SimpleAttributeSet( doc.getStyle( STYLE_HYPERLINK ) );
+					tmpAttr.addAttribute( ATTR_HYPERLINK_TARGET, url );
+					doc.insertString( doc.getLength(), "Link", tmpAttr );
+				} else {
+					doc.insertString( doc.getLength(), url, regularStyle );
+				}
+
+				doc.insertString( doc.getLength(), "\n", regularStyle );
+			}
+
+			doc.insertString( doc.getLength(), "\n", regularStyle );
+
+			if ( body != null ) {
+				doc.insertString( doc.getLength(), body, regularStyle );
+			}
+		}
+		catch ( BadLocationException e ) {
+			log.error( "Error filling info text area", e );
+		}
+
+		textPane.setCaretPosition( 0 );
+	}
+
+
+	public void setCaretPosition( int n ) {
+		textPane.setCaretPosition( n );
+	}
+
+	public void clear() {
+		try {
+			doc.remove( 0, doc.getLength() );
+		}
+		catch ( BadLocationException e ) {
+			log.error( "Error clearing info text area", e );
+		}
+	}
+
+	public void appendTitleText( String s ) throws BadLocationException {
+		doc.insertString( doc.getLength(), s, doc.getStyle( STYLE_TITLE ) );
+	}
+
+	public void appendRegularText( String s ) throws BadLocationException {
+		doc.insertString( doc.getLength(), s, doc.getStyle( STYLE_REGULAR ) );
+	}
+
+	public void appendLinkText( String linkURL, String linkTitle ) throws BadLocationException {
+		if ( browseWorks && linkURL.matches( "^(?:https?|ftp)://.*" ) ) {
+			SimpleAttributeSet tmpAttr = new SimpleAttributeSet( doc.getStyle( STYLE_HYPERLINK ) );
+			tmpAttr.addAttribute( ATTR_HYPERLINK_TARGET, linkURL );
+			doc.insertString( doc.getLength(), linkTitle, tmpAttr );
+		} else {
+			doc.insertString( doc.getLength(), linkURL, doc.getStyle( STYLE_REGULAR ) );
+		}
+	}
+
+
+	/**
+	 * Sets a component with a statusbar to be set during mouse events.
+	 */
+	public void setStatusbar( Statusbar comp ) {
+		this.statusbar = comp;
+	}
+
+
+	private static StyleContext getDefaultStyleContext() {
+		StyleContext result = new StyleContext();
+		Style defaultStyle = StyleContext.getDefaultStyleContext().getStyle( StyleContext.DEFAULT_STYLE );
+		Style baseStyle = result.addStyle( "base", defaultStyle );
+
+		Style regularStyle = result.addStyle( STYLE_REGULAR, baseStyle );
+		StyleConstants.setFontFamily( regularStyle, Font.MONOSPACED );
+		StyleConstants.setFontSize( regularStyle, 12 );
+
+		Style hyperStyle = result.addStyle( STYLE_HYPERLINK, regularStyle );
+		StyleConstants.setForeground( hyperStyle, COLOR_HYPER );
+		StyleConstants.setUnderline( hyperStyle, true );
+
+		Style titleStyle = result.addStyle( STYLE_TITLE, baseStyle );
+		StyleConstants.setFontFamily( titleStyle, Font.SANS_SERIF );
+		StyleConstants.setFontSize( titleStyle, 24 );
+		StyleConstants.setBold( titleStyle, true );
+
+		return result;
+	}
+}

src/main/java/net/vhati/modmanager/ui/ModPatchDialog.java

@@ -0,0 +1,78 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.Frame;
+import java.io.File;
+import javax.swing.JDialog;
+import javax.swing.SwingUtilities;
+
+import net.vhati.modmanager.core.ModPatchObserver;
+import net.vhati.modmanager.ui.ProgressDialog;
+
+
+public class ModPatchDialog extends ProgressDialog implements ModPatchObserver {
+
+
+	public ModPatchDialog( Frame owner, boolean continueOnSuccess ) {
+		super( owner, continueOnSuccess );
+		this.setTitle( "Patching..." );
+
+		this.setSize( 400, 160 );
+		this.setMinimumSize( this.getPreferredSize() );
+		this.setLocationRelativeTo( owner );
+	}
+
+
+	/**
+	 * Updates the progress bar.
+	 *
+	 * If either arg is -1, the bar will become indeterminate.
+	 *
+	 * @param value the new value
+	 * @param max the new maximum
+	 */
+	@Override
+	public void patchingProgress( final int value, final int max ) {
+		this.setProgressLater( value, max );
+	}
+
+	/**
+	 * Non-specific activity.
+	 *
+	 * @param message a string, or null
+	 */
+	@Override
+	public void patchingStatus( final String message ) {
+		setStatusTextLater( message != null ? message : "..." );
+	}
+
+	/**
+	 * A mod is about to be processed.
+	 */
+	@Override
+	public void patchingMod( final File modFile ) {
+		setStatusTextLater( String.format( "Installing mod \"%s\"...", modFile.getName() ) );
+	}
+
+	/**
+	 * Patching ended.
+	 *
+	 * If anything went wrong, e may be non-null.
+	 */
+	@Override
+	public void patchingEnded( boolean outcome, Exception e ) {
+		setTaskOutcomeLater( outcome, e );
+	}
+
+
+	@Override
+	protected void setTaskOutcome( boolean outcome, Exception e ) {
+		super.setTaskOutcome( outcome, e );
+		if ( !this.isShowing() ) return;
+
+		if ( succeeded == true ) {
+			setStatusText( "Patching completed." );
+		} else {
+			setStatusText( String.format( "Patching failed: %s", e ) );
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/ModXMLSandbox.java

@@ -0,0 +1,591 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.FocusAdapter;
+import java.awt.event.FocusEvent;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+import java.io.File;
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.FileNotFoundException;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.swing.AbstractAction;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JOptionPane;
+import javax.swing.JScrollPane;
+import javax.swing.JSplitPane;
+import javax.swing.JTabbedPane;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+import javax.swing.JTree;
+import javax.swing.KeyStroke;
+import javax.swing.SwingUtilities;
+import javax.swing.event.AncestorEvent;
+import javax.swing.event.AncestorListener;
+import javax.swing.event.CaretEvent;
+import javax.swing.event.CaretListener;
+import javax.swing.event.UndoableEditEvent;
+import javax.swing.event.UndoableEditListener;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Caret;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.TreePath;
+import javax.swing.undo.CannotRedoException;
+import javax.swing.undo.UndoManager;
+
+import net.vhati.ftldat.AbstractPack;
+import net.vhati.ftldat.FTLPack;
+import net.vhati.ftldat.PkgPack;
+import net.vhati.modmanager.core.ModUtilities;
+import net.vhati.modmanager.core.SloppyXMLOutputProcessor;
+import net.vhati.modmanager.core.XMLPatcher;
+import net.vhati.modmanager.ui.ClipboardMenuMouseListener;
+
+import org.jdom2.JDOMException;
+
+
+/**
+ * A basic text editor to test XML modding.
+ */
+public class ModXMLSandbox extends JFrame implements ActionListener {
+
+	private static final String baseTitle = "Mod XML Sandbox";
+
+	private UndoManager undoManager = new UndoManager();
+	private String mainText = null;
+
+	private File datsDir;
+
+	private JTabbedPane areasPane;
+	private JScrollPane mainScroll;
+	private JScrollPane appendScroll;
+	private JScrollPane resultScroll;
+	private JSplitPane splitPane;
+	private JScrollPane messageScroll;
+
+	private JTextArea mainArea;
+	private JTextArea appendArea;
+	private JTextArea resultArea;
+	private JTextArea messageArea;
+	private JTextField findField;
+	private JButton openBtn;
+	private JButton patchBtn;
+	private JLabel statusLbl;
+
+
+	public ModXMLSandbox( File datsDir ) {
+		super( baseTitle );
+		this.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
+
+		this.datsDir = datsDir;
+
+		Font sandboxFont = new Font( Font.MONOSPACED, Font.PLAIN, 13 );
+
+		mainArea = new JTextArea();
+		mainArea.setTabSize( 4 );
+		mainArea.setFont( sandboxFont );
+		mainArea.setEditable( false );
+		mainArea.addMouseListener( new ClipboardMenuMouseListener() );
+		mainScroll = new JScrollPane( mainArea );
+
+		appendArea = new JTextArea();
+		appendArea.setTabSize( 4 );
+		appendArea.setFont( sandboxFont );
+		appendArea.addMouseListener( new ClipboardMenuMouseListener() );
+		appendScroll = new JScrollPane( appendArea );
+
+		resultArea = new JTextArea();
+		resultArea.setTabSize( 4 );
+		resultArea.setFont( sandboxFont );
+		resultArea.setEditable( false );
+		resultArea.addMouseListener( new ClipboardMenuMouseListener() );
+		resultScroll = new JScrollPane( resultArea );
+
+		messageArea = new JTextArea();
+		messageArea.setLineWrap( true );
+		messageArea.setWrapStyleWord( true );
+		messageArea.setTabSize( 4 );
+		messageArea.setFont( sandboxFont );
+		messageArea.setEditable( false );
+		messageArea.addMouseListener( new ClipboardMenuMouseListener() );
+		messageArea.setText( "This is a sandbox to tinker with advanced mod syntax.\n1) Open XML from data.dat to fill the 'main' tab. (ctrl-o)\n2) Write some <mod:command> tags in the 'append' tab. (alt-1,2,3)\n3) Click Patch to see what would happen. (ctrl-p)\nUndo/redo is available. (ctrl-z/ctrl-y)" );
+		messageScroll = new JScrollPane( messageArea );
+
+		JPanel ctrlPanel = new JPanel();
+		ctrlPanel.setLayout( new BoxLayout( ctrlPanel, BoxLayout.X_AXIS ) );
+
+		openBtn = new JButton( "Open Main..." );
+		openBtn.addActionListener( this );
+		ctrlPanel.add( openBtn );
+
+		ctrlPanel.add( Box.createHorizontalGlue() );
+
+		findField = new JTextField( "<find: ctrl-f, F3/shift-F3>", 20 );
+		findField.setMaximumSize( new Dimension( 60, findField.getPreferredSize().height ) );
+		ctrlPanel.add( findField );
+
+		ctrlPanel.add( Box.createHorizontalGlue() );
+
+		patchBtn = new JButton( "Patch" );
+		patchBtn.addActionListener( this );
+		ctrlPanel.add( patchBtn );
+
+		areasPane = new JTabbedPane( JTabbedPane.BOTTOM );
+		areasPane.add( "Main", mainScroll );
+		areasPane.add( "Append", appendScroll );
+		areasPane.add( "Result", resultScroll );
+
+		JPanel topPanel = new JPanel( new BorderLayout() );
+		topPanel.add( areasPane, BorderLayout.CENTER );
+		topPanel.add( ctrlPanel, BorderLayout.SOUTH );
+
+		splitPane = new JSplitPane( JSplitPane.VERTICAL_SPLIT );
+		splitPane.setTopComponent( topPanel );
+		splitPane.setBottomComponent( messageScroll );
+
+		JPanel statusPanel = new JPanel();
+		statusPanel.setLayout( new BoxLayout( statusPanel, BoxLayout.Y_AXIS ) );
+		statusPanel.setBorder( BorderFactory.createLoweredBevelBorder() );
+		statusLbl = new JLabel( " " );
+		statusLbl.setBorder( BorderFactory.createEmptyBorder( 2, 4, 2, 4 ) );
+		statusLbl.setAlignmentX( Component.LEFT_ALIGNMENT );
+		statusPanel.add( statusLbl );
+
+		JPanel contentPane = new JPanel( new BorderLayout() );
+		contentPane.add( splitPane, BorderLayout.CENTER );
+		contentPane.add( statusPanel, BorderLayout.SOUTH );
+		this.setContentPane( contentPane );
+
+		findField.addFocusListener(new FocusAdapter() {
+			@Override
+			public void focusGained( FocusEvent e ) {
+				findField.selectAll();
+			}
+		});
+		CaretListener caretListener = new CaretListener() {
+			@Override
+			public void caretUpdate( CaretEvent e ) {
+				JTextArea currentArea = getCurrentArea();
+				if ( currentArea == null ) return;
+				if ( e.getSource() != currentArea ) return;
+				updateCaretStatus();
+			}
+		};
+		mainArea.addCaretListener( caretListener );
+		appendArea.addCaretListener( caretListener );
+		resultArea.addCaretListener( caretListener );
+
+		CaretAncestorListener caretAncestorListener = new CaretAncestorListener();
+		mainArea.addAncestorListener( caretAncestorListener );
+		appendArea.addAncestorListener( caretAncestorListener );
+		resultArea.addAncestorListener( caretAncestorListener );
+
+		appendArea.getDocument().addUndoableEditListener(new UndoableEditListener() {
+			@Override
+			public void undoableEditHappened( UndoableEditEvent e ) {
+				undoManager.addEdit( e.getEdit() );
+			}
+		});
+		AbstractAction undoAction = new AbstractAction( "Undo" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				try {undoManager.undo();}
+				catch ( CannotRedoException f ) {}
+			}
+		};
+		AbstractAction redoAction = new AbstractAction( "Redo" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				try {undoManager.redo();}
+				catch ( CannotRedoException f ) {}
+			}
+		};
+
+		AbstractAction openAction = new AbstractAction( "Open" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				open();
+			}
+		};
+		AbstractAction patchAction = new AbstractAction( "Patch" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				patch();
+			}
+		};
+		AbstractAction focusFindAction = new AbstractAction( "Focus Find" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				findField.requestFocusInWindow();
+			}
+		};
+		AbstractAction findNextAction = new AbstractAction( "Find Next" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				findNext();
+			}
+		};
+		AbstractAction findPreviousAction = new AbstractAction( "Find Previous" ) {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				findPrevious();
+			}
+		};
+
+		KeyStroke undoShortcut = KeyStroke.getKeyStroke( "control Z" );
+		appendArea.getInputMap().put( undoShortcut, "undo" );
+		appendArea.getActionMap().put( "undo", undoAction );
+		KeyStroke redoShortcut = KeyStroke.getKeyStroke( "control Y" );
+		appendArea.getInputMap().put( redoShortcut, "redo" );
+		appendArea.getActionMap().put( "redo", redoAction );
+
+		KeyStroke openShortcut = KeyStroke.getKeyStroke( "control O" );
+		contentPane.getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( openShortcut, "open" );
+		contentPane.getActionMap().put( "open", openAction );
+		KeyStroke patchShortcut = KeyStroke.getKeyStroke( "control P" );
+		contentPane.getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( patchShortcut, "patch" );
+		contentPane.getActionMap().put( "patch", patchAction );
+		KeyStroke focusFindShortcut = KeyStroke.getKeyStroke( "control F" );
+		contentPane.getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( focusFindShortcut, "focus find" );
+		contentPane.getActionMap().put( "focus find", focusFindAction );
+		KeyStroke findNextShortcut = KeyStroke.getKeyStroke( "F3" );
+		contentPane.getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( findNextShortcut, "find next" );
+		contentPane.getActionMap().put( "find next", findNextAction );
+		KeyStroke findPreviousShortcut = KeyStroke.getKeyStroke( "shift F3" );
+		contentPane.getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( findPreviousShortcut, "find previous" );
+		contentPane.getActionMap().put( "find previous", findPreviousAction );
+
+		findField.getInputMap().put( KeyStroke.getKeyStroke( "released ENTER" ), "find next" );
+		findField.getActionMap().put( "find next", findNextAction );
+
+		areasPane.setMnemonicAt( 0, KeyEvent.VK_1 );
+		areasPane.setMnemonicAt( 1, KeyEvent.VK_2 );
+		areasPane.setMnemonicAt( 2, KeyEvent.VK_3 );
+		mainArea.addAncestorListener( new FocusAncestorListener( mainArea ) );
+		appendArea.addAncestorListener( new FocusAncestorListener( appendArea ) );
+		resultArea.addAncestorListener( new FocusAncestorListener( resultArea ) );
+
+		this.pack();
+	}
+
+	@Override
+	public void setVisible( boolean b ) {
+		super.setVisible( b );
+
+		if ( b ) {
+			// Splitpane has to be realized before the divider can be moved.
+			SwingUtilities.invokeLater(new Runnable() {
+				@Override
+				public void run() {
+					splitPane.setDividerLocation( 0.80d );
+				}
+			});
+		}
+	}
+
+	@Override
+	public void actionPerformed( ActionEvent e ) {
+		Object source = e.getSource();
+
+		if ( source == openBtn ) {
+			open();
+		}
+		else if ( source == patchBtn ) {
+			patch();
+		}
+	}
+
+	private void open() {
+		messageArea.setText( "" );
+
+		AbstractPack pack = null;
+		InputStream is = null;
+		try {
+			File ftlDatFile = new File( datsDir, "ftl.dat" );
+			File dataDatFile = new File( datsDir, "data.dat" );
+
+			if ( ftlDatFile.exists() ) {  // FTL 1.6.1.
+				pack = new PkgPack( ftlDatFile, "r" );
+			}
+			else if ( dataDatFile.exists() ) {  // FTL 1.01-1.5.13.
+				pack = new FTLPack( dataDatFile, "r" );
+			}
+			else {
+				throw new FileNotFoundException( String.format( "Could not find either \"%s\" or \"%s\"", ftlDatFile.getName(), dataDatFile.getName() ) );
+			}
+
+			List<String> innerPaths = pack.list();
+
+			String innerPath = promptForInnerPath( innerPaths );
+			if ( innerPath == null ) return;
+
+			is = pack.getInputStream( innerPath );
+			InputStream rebuiltStream = ModUtilities.rebuildXMLFile( is, "windows-1252", pack.getName()+":"+innerPath );
+			String rebuiltText = ModUtilities.decodeText( rebuiltStream, "Sandbox Main XML" ).text;
+			is.close();
+
+			mainArea.setText( rebuiltText );
+			mainArea.setCaretPosition( 0 );
+			areasPane.setSelectedComponent( mainScroll );
+			resultArea.setText( "" );
+			this.setTitle( String.format( "%s - %s", innerPath, baseTitle ) );
+		}
+		catch ( IOException f ) {
+			messageArea.setText( f.getMessage() );
+			messageArea.setCaretPosition( 0 );
+		}
+		catch ( JDOMException f ) {
+			messageArea.setText( f.getMessage() );
+			messageArea.setCaretPosition( 0 );
+		}
+		finally {
+			try {if ( is != null ) is.close();}
+			catch ( IOException f ) {}
+
+			try {if ( pack != null ) pack.close();}
+			catch ( IOException f ) {}
+		}
+	}
+
+	private void patch() {
+		String mainText = mainArea.getText();
+		if ( mainText.length() == 0 ) return;
+
+		messageArea.setText( "" );
+
+		try {
+			InputStream mainStream = new ByteArrayInputStream( mainText.getBytes( "UTF-8" ) );
+
+			String appendText = appendArea.getText();
+			InputStream appendStream = new ByteArrayInputStream( appendText.getBytes( "UTF-8" ) );
+
+			InputStream resultStream = ModUtilities.patchXMLFile( mainStream, appendStream, "windows-1252", false, "Sandbox Main XML", "Sandbox Append XML" );
+			String resultText = ModUtilities.decodeText( resultStream, "Sandbox Result XML" ).text;
+
+			resultArea.setText( resultText );
+			resultArea.setCaretPosition( 0 );
+			areasPane.setSelectedComponent( resultScroll );
+		}
+		catch ( Exception e ) {
+			messageArea.setText( e.toString() );
+			messageArea.setCaretPosition( 0 );
+		}
+	}
+
+	private void findNext() {
+		JTextArea currentArea = getCurrentArea();
+		if ( currentArea == null ) return;
+
+		String query = findField.getText();
+		if ( query.length() == 0 ) return;
+
+		Caret caret = currentArea.getCaret();
+		int from = Math.max( caret.getDot(), caret.getMark() );
+
+		Pattern ptn = Pattern.compile( "(?i)"+ Pattern.quote( query ) );
+		Matcher m = ptn.matcher( currentArea.getText() );
+		if ( m.find(from) ) {
+			caret.setDot( m.start() );
+			caret.moveDot( m.end() );
+			caret.setSelectionVisible( true );
+		}
+	}
+
+	private void findPrevious() {
+		JTextArea currentArea = getCurrentArea();
+		if ( currentArea == null ) return;
+
+		String query = findField.getText();
+		if ( query.length() == 0 ) return;
+
+		Caret caret = currentArea.getCaret();
+		int from = Math.min( caret.getDot(), caret.getMark() );
+
+		Pattern ptn = Pattern.compile( "(?i)"+ Pattern.quote(query) );
+		Matcher m = ptn.matcher( currentArea.getText() );
+		m.region( 0, from );
+		int lastStart = -1;
+		int lastEnd = -1;
+		while ( m.find() ) {
+			lastStart = m.start();
+			lastEnd = m.end();
+		}
+		if ( lastStart != -1 ) {
+			caret.setDot( lastStart );
+			caret.moveDot( lastEnd );
+			caret.setSelectionVisible( true );
+		}
+	}
+
+	private void updateCaretStatus() {
+		JTextArea currentArea = getCurrentArea();
+		if ( currentArea == null ) return;
+
+		try {
+			int offset = currentArea.getCaretPosition();
+			int line = currentArea.getLineOfOffset( offset );
+			int lineStart = currentArea.getLineStartOffset( line );
+			int col = offset - lineStart;
+			int lineCount = currentArea.getLineCount();
+			statusLbl.setText( String.format( "Line: %4d/%4d Col: %3d", line+1, lineCount, col+1 ) );
+		}
+		catch ( BadLocationException e ) {
+			statusLbl.setText( String.format( "Line:  ???/ ??? Col: ???" ) );
+		}
+	}
+
+	private JTextArea getCurrentArea() {
+		if ( areasPane.getSelectedIndex() == 0 )
+			return mainArea;
+		else if ( areasPane.getSelectedIndex() == 1 )
+			return appendArea;
+		else if ( areasPane.getSelectedIndex() == 2 )
+			return resultArea;
+		else
+			return null;
+	}
+
+	/**
+	 * Shows a modal prompt with a JTree representing a list of paths.
+	 *
+	 * @return the selected path, null otherwise
+	 */
+	private String promptForInnerPath( List<String> innerPaths ) {
+		String result = null;
+
+		Set<String> sortedPaths = new TreeSet<String>( innerPaths );
+		for ( Iterator<String> it = sortedPaths.iterator(); it.hasNext(); ) {
+			if ( !it.next().endsWith(".xml") ) it.remove();
+		}
+
+		DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode( "/" );
+		DefaultTreeModel treeModel = new DefaultTreeModel( rootNode );
+
+		for ( String innerPath : sortedPaths ) {
+			buildTreeFromString( treeModel, innerPath );
+		}
+
+		JTree pathTree = new JTree( treeModel );
+		pathTree.setRootVisible( false );
+		for ( int i=0; i < pathTree.getRowCount(); i++ ) {
+			pathTree.expandRow( i );
+		}
+		JScrollPane treeScroll = new JScrollPane( pathTree );
+		treeScroll.setPreferredSize( new Dimension( pathTree.getPreferredSize().width, 300 ) );
+
+		pathTree.addAncestorListener( new FocusAncestorListener( pathTree ) );
+
+		int popupResult = JOptionPane.showOptionDialog( this, treeScroll, "Open an XML Resource", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE, null, new String[]{"OK"}, "OK" );
+
+		if ( popupResult == JOptionPane.OK_OPTION ) {
+			StringBuilder buf = new StringBuilder();
+
+			TreePath selectedPath = pathTree.getSelectionPath();
+			if ( selectedPath != null ) {
+				for ( Object o : selectedPath.getPath() ) {
+					DefaultMutableTreeNode pathComp = (DefaultMutableTreeNode)o;
+					if ( !pathComp.isRoot() ) {
+						Object userObject = pathComp.getUserObject();
+						buf.append( userObject.toString() );
+					}
+				}
+				if ( buf.length() > 0 ) result = buf.toString();
+			}
+		}
+
+		return result;
+	}
+
+	/**
+	 * Adds TreeNodes, if they don't already exist, based on a shash-delimited string.
+	 */
+	@SuppressWarnings("unchecked")
+	private void buildTreeFromString( DefaultTreeModel treeModel, String path ) {
+//		Method commented out to get application to compile. Figure out what this did and fix it
+//		DefaultMutableTreeNode rootNode = (DefaultMutableTreeNode)treeModel.getRoot();
+//		DefaultMutableTreeNode currentNode = rootNode;
+//
+//		String[] chunks = path.split( "/" );
+//
+//		for ( int i=0; i < chunks.length; i++ ) {
+//			String chunk = chunks[i];
+//			if ( i < chunks.length-1 )
+//				chunk += "/";
+//
+//			boolean found = false;
+//			Enumeration<DefaultMutableTreeNode> enumIt = currentNode.children();
+//			while ( enumIt.hasMoreElements()  ) {
+//				DefaultMutableTreeNode tmpNode = enumIt.nextElement();
+//				if ( chunk.equals( tmpNode.getUserObject() ) ) {
+//					found = true;
+//					currentNode = tmpNode;
+//					break;
+//				}
+//			}
+//			if ( !found ) {
+//				DefaultMutableTreeNode newNode = new DefaultMutableTreeNode( chunk );
+//				currentNode.insert( newNode, currentNode.getChildCount() );
+//				currentNode = newNode;
+//			}
+//		}
+	}
+
+
+
+	private class CaretAncestorListener implements AncestorListener {
+		@Override
+		public void ancestorAdded( AncestorEvent e ) {
+			updateCaretStatus();
+		}
+		@Override
+		public void ancestorMoved( AncestorEvent e ) {
+		}
+		@Override
+		public void ancestorRemoved( AncestorEvent e ) {
+		}
+	}
+
+
+
+	private static class FocusAncestorListener implements AncestorListener {
+		private JComponent comp;
+
+		public FocusAncestorListener( JComponent comp ) {
+			this.comp = comp;
+		}
+
+		@Override
+		public void ancestorAdded( AncestorEvent e ) {
+			comp.requestFocusInWindow();
+		}
+		@Override
+		public void ancestorMoved( AncestorEvent e ) {
+		}
+		@Override
+		public void ancestorRemoved( AncestorEvent e ) {
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/Nerfable.java

@@ -0,0 +1,16 @@
+package net.vhati.modmanager.ui;
+
+
+/*
+ * An interface to en/disable user interaction.
+ * It was written with JFrames and glass panes in mind.
+ */
+public interface Nerfable {
+
+	/*
+	 * Either nerf or restore user interaction.
+	 *
+	 * @param b the nerfed state
+	 */
+	public void setNerfed( boolean b );
+}

src/main/java/net/vhati/modmanager/ui/ProgressDialog.java

@@ -0,0 +1,224 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.BorderLayout;
+import java.awt.Frame;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JPanel;
+import javax.swing.JProgressBar;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.SwingUtilities;
+
+
+public class ProgressDialog extends JDialog implements ActionListener {
+
+	protected JScrollPane statusScroll;
+	protected JProgressBar progressBar;
+	protected JTextArea statusArea;
+	protected JButton continueBtn;
+
+	protected boolean continueOnSuccess = false;
+	protected boolean done = false;
+	protected boolean succeeded = false;
+	protected Runnable successTask = null;
+
+
+	public ProgressDialog( Frame owner, boolean continueOnSuccess ) {
+		super( owner, true );
+		this.setDefaultCloseOperation( JDialog.DO_NOTHING_ON_CLOSE );
+
+		this.continueOnSuccess = continueOnSuccess;
+
+		progressBar = new JProgressBar();
+		progressBar.setBorderPainted( true );
+
+		JPanel progressHolder = new JPanel( new BorderLayout() );
+		progressHolder.setBorder( BorderFactory.createEmptyBorder( 10, 15, 0, 15 ) );
+		progressHolder.add( progressBar );
+		getContentPane().add( progressHolder, BorderLayout.NORTH );
+
+		statusArea = new JTextArea( 5, 50 );
+		statusArea.setLineWrap( true );
+		statusArea.setWrapStyleWord( true );
+		statusArea.setFont( statusArea.getFont().deriveFont( 13f ) );
+		statusArea.setEditable( false );
+		statusScroll = new JScrollPane( statusArea );
+
+		JPanel statusHolder = new JPanel( new BorderLayout() );
+		statusHolder.setBorder( BorderFactory.createEmptyBorder( 15, 15, 15, 15 ) );
+		statusHolder.add( statusScroll );
+		getContentPane().add( statusHolder, BorderLayout.CENTER );
+
+		continueBtn = new JButton( "Continue" );
+		continueBtn.setEnabled( false );
+		continueBtn.addActionListener( this );
+
+		JPanel continueHolder = new JPanel();
+		continueHolder.setLayout( new BoxLayout( continueHolder, BoxLayout.X_AXIS ) );
+		continueHolder.setBorder( BorderFactory.createEmptyBorder( 0, 0, 10, 0 ) );
+		continueHolder.add( Box.createHorizontalGlue() );
+		continueHolder.add( continueBtn );
+		continueHolder.add( Box.createHorizontalGlue() );
+		getContentPane().add( continueHolder, BorderLayout.SOUTH );
+
+		this.pack();
+		this.setMinimumSize( this.getPreferredSize() );
+		this.setLocationRelativeTo( owner );
+	}
+
+
+	@Override
+	public void actionPerformed( ActionEvent e ) {
+		Object source = e.getSource();
+
+		if ( source == continueBtn ) {
+			this.setVisible( false );
+			this.dispose();
+
+			if ( done &&  succeeded && successTask != null ) {
+				successTask.run();
+			}
+		}
+	}
+
+
+	/**
+	 * Updates the text area's content. (Thread-safe)
+	 *
+	 * @param message a string, or null
+	 */
+	public void setStatusTextLater( final String message ) {
+		SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				setStatusText( message != null ? message : "..." );
+			}
+		});
+	}
+
+	protected void setStatusText( String message ) {
+		statusArea.setText( message != null ? message : "..." );
+		statusArea.setCaretPosition( 0 );
+	}
+
+
+	/**
+	 * Updates the progress bar. (Thread-safe)
+	 *
+	 * If the arg is -1, the bar will become indeterminate.
+	 *
+	 * @param value the new value
+	 */
+	public void setProgressLater( final int value ) {
+		SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				if ( value >= 0 ) {
+					if ( progressBar.isIndeterminate() )
+						progressBar.setIndeterminate( false );
+
+					progressBar.setValue( value );
+				}
+				else {
+					if ( !progressBar.isIndeterminate() )
+						progressBar.setIndeterminate( true );
+					progressBar.setValue( 0 );
+				}
+			}
+		});
+	}
+
+	/**
+	 * Updates the progress bar. (Thread-safe)
+	 *
+	 * If either arg is -1, the bar will become indeterminate.
+	 *
+	 * @param value the new value
+	 * @param max the new maximum
+	 */
+	public void setProgressLater( final int value, final int max ) {
+		SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				if ( value >= 0 && max >= 0 ) {
+					if ( progressBar.isIndeterminate() )
+						progressBar.setIndeterminate( false );
+
+					if ( progressBar.getMaximum() != max ) {
+						progressBar.setValue( 0 );
+						progressBar.setMaximum( max );
+					}
+					progressBar.setValue( value );
+				}
+				else {
+					if ( !progressBar.isIndeterminate() )
+						progressBar.setIndeterminate( true );
+					progressBar.setValue( 0 );
+				}
+			}
+		});
+	}
+
+
+	/**
+	 * Triggers a response to the immediate task ending. (Thread-safe)
+	 *
+	 * If anything went wrong, e may be non-null.
+	 */
+	public void setTaskOutcomeLater( final boolean success, final Exception e ) {
+		SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				setTaskOutcome( success, e );
+			}
+		});
+	}
+
+	protected void setTaskOutcome( final boolean outcome, final Exception e ) {
+		done = true;
+		succeeded = outcome;
+
+		if ( !ProgressDialog.this.isShowing() ) {
+			// The window's not visible, no continueBtn to click.
+			ProgressDialog.this.dispose();
+
+			if ( succeeded && successTask != null ) {
+				successTask.run();
+			}
+		}
+		if ( continueOnSuccess && succeeded && successTask != null ) {
+			ProgressDialog.this.setVisible( false );
+			ProgressDialog.this.dispose();
+			successTask.run();
+		}
+		else {
+			continueBtn.setEnabled( true );
+			continueBtn.requestFocusInWindow();
+		}
+	}
+
+
+	/**
+	 * Sets a runnable to trigger after the immediate task ends successfully.
+	 */
+	public void setSuccessTask( Runnable r ) {
+		successTask = r;
+	}
+
+	/**
+	 * Shows or hides this component depending on the value of parameter b.
+	 *
+	 * If the immediate task has already completed,
+	 * this method will do nothing.
+	 */
+	public void setVisible( boolean b ) {
+		if ( !done ) super.setVisible( b );
+	}
+}

src/main/java/net/vhati/modmanager/ui/RegexDocument.java

@@ -0,0 +1,69 @@
+package net.vhati.modmanager.ui;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.PlainDocument;
+
+
+/**
+ * A Document thats restricts characters based on a regex.
+ *
+ * @see javax.swing.JTextField.setDocument(javax.swing.text.Ducument)
+ */
+public class RegexDocument extends PlainDocument {
+
+	private Pattern pattern = null;
+
+
+	public RegexDocument( Pattern p ) {
+		pattern = p;
+	}
+
+	public RegexDocument( String regex ) {
+		try {
+			if ( regex != null && regex.length() > 0 ) {
+				pattern = Pattern.compile( regex );
+			}
+		}
+		catch ( PatternSyntaxException e ) {}
+	}
+
+	public RegexDocument() {
+	}
+
+
+	@Override
+	public void insertString( int offs, String str, AttributeSet a ) throws BadLocationException {
+		if ( str == null ) return;
+
+		boolean proceed = true;
+
+		if ( pattern != null ) {
+			String tmp = super.getText( 0, offs ) + str + (super.getLength()>offs ? super.getText( offs, super.getLength()-offs ) : "");
+			Matcher m = pattern.matcher( tmp );
+			proceed = m.matches();
+		}
+
+		if ( proceed == true ) super.insertString( offs, str, a );
+	}
+
+
+	@Override
+	public void remove( int offs, int len ) throws BadLocationException {
+		boolean proceed = true;
+
+		if ( pattern != null ) {
+			try {
+				String tmp = super.getText( 0, offs ) + (super.getLength()>(offs+len) ? super.getText( offs+len, super.getLength()-(offs+len) ) : "");
+				Matcher m = pattern.matcher( tmp );
+				proceed = m.matches();
+			}
+			catch ( BadLocationException e ) {}
+		}
+
+		if ( proceed == true ) super.remove( offs, len );
+	}
+}

src/main/java/net/vhati/modmanager/ui/SlipstreamConfigDialog.java

@@ -0,0 +1,211 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JDialog;
+import javax.swing.JFileChooser;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextField;
+import javax.swing.ScrollPaneConstants;
+import javax.swing.event.AncestorEvent;
+import javax.swing.event.AncestorListener;
+
+import net.vhati.modmanager.core.FTLUtilities;
+import net.vhati.modmanager.core.SlipstreamConfig;
+import net.vhati.modmanager.ui.FieldEditorPanel;
+import net.vhati.modmanager.ui.FieldEditorPanel.ContentType;
+
+
+public class SlipstreamConfigDialog extends JDialog implements ActionListener {
+
+	protected static final String ALLOW_ZIP = SlipstreamConfig.ALLOW_ZIP;
+	protected static final String RUN_STEAM_FTL = SlipstreamConfig.RUN_STEAM_FTL;
+	protected static final String NEVER_RUN_FTL = SlipstreamConfig.NEVER_RUN_FTL;
+	protected static final String USE_DEFAULT_UI = SlipstreamConfig.USE_DEFAULT_UI;
+	protected static final String REMEMBER_GEOMETRY = SlipstreamConfig.REMEMBER_GEOMETRY;
+	protected static final String UPDATE_CATALOG = SlipstreamConfig.UPDATE_CATALOG;
+	protected static final String UPDATE_APP = SlipstreamConfig.UPDATE_APP;
+	protected static final String FTL_DATS_PATH = SlipstreamConfig.FTL_DATS_PATH;
+	protected static final String STEAM_EXE_PATH = SlipstreamConfig.STEAM_EXE_PATH;
+
+	protected SlipstreamConfig appConfig;
+
+	protected FieldEditorPanel editorPanel;
+	protected JButton applyBtn;
+
+
+	public SlipstreamConfigDialog( Frame owner, SlipstreamConfig appConfig ) {
+		super( owner, "Preferences..." );
+		this.setDefaultCloseOperation( JDialog.DISPOSE_ON_CLOSE );
+
+		this.appConfig = appConfig;
+
+		editorPanel = new FieldEditorPanel( false );
+		editorPanel.setBorder( BorderFactory.createEmptyBorder( 10, 10, 0, 10 ) );
+		editorPanel.setNameWidth( 250 );
+
+		editorPanel.addRow( ALLOW_ZIP, ContentType.BOOLEAN );
+		editorPanel.addTextRow( "Treat .zip files as .ftl files." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( RUN_STEAM_FTL, ContentType.BOOLEAN );
+		editorPanel.addTextRow( "Use Steam to run FTL, if possible." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( NEVER_RUN_FTL, ContentType.BOOLEAN );
+		editorPanel.addTextRow( "Don't offer to run FTL after patching." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( USE_DEFAULT_UI, ContentType.BOOLEAN );
+		editorPanel.addTextRow( "Don't attempt to resemble a native GUI." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( REMEMBER_GEOMETRY, ContentType.BOOLEAN );
+		editorPanel.addTextRow( "Save window geometry on exit." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( UPDATE_CATALOG, ContentType.INTEGER );
+		editorPanel.addTextRow( "Check for new mod descriptions every N days. (0 to disable)" );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( UPDATE_APP, ContentType.INTEGER );
+		editorPanel.addTextRow( "Check for newer app versions every N days. (0 to disable)" );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( FTL_DATS_PATH, ContentType.CHOOSER );
+		editorPanel.addTextRow( "Path to FTL's resources folder." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addRow( STEAM_EXE_PATH, ContentType.CHOOSER );
+		editorPanel.addTextRow( "Path to Steam's executable." );
+		editorPanel.addSeparatorRow();
+		editorPanel.addBlankRow();
+		editorPanel.addTextRow( "Note: Some changes may have no immediate effect." );
+		editorPanel.addBlankRow();
+		editorPanel.addFillRow();
+
+		editorPanel.getBoolean( ALLOW_ZIP ).setSelected( "true".equals( appConfig.getProperty( SlipstreamConfig.ALLOW_ZIP, "false" ) ) );
+		editorPanel.getBoolean( RUN_STEAM_FTL ).setSelected( "true".equals( appConfig.getProperty( SlipstreamConfig.RUN_STEAM_FTL, "false" ) ) );
+		editorPanel.getBoolean( NEVER_RUN_FTL ).setSelected( "true".equals( appConfig.getProperty( SlipstreamConfig.NEVER_RUN_FTL, "false" ) ) );
+		editorPanel.getBoolean( USE_DEFAULT_UI ).setSelected( "true".equals( appConfig.getProperty( SlipstreamConfig.USE_DEFAULT_UI, "false" ) ) );
+		editorPanel.getBoolean( REMEMBER_GEOMETRY ).setSelected( "true".equals( appConfig.getProperty( SlipstreamConfig.REMEMBER_GEOMETRY, "true" ) ) );
+		editorPanel.getInt( UPDATE_CATALOG ).setText( Integer.toString( appConfig.getPropertyAsInt( SlipstreamConfig.UPDATE_CATALOG, 0 ) ) );
+		editorPanel.getInt( UPDATE_APP ).setText( Integer.toString( appConfig.getPropertyAsInt( SlipstreamConfig.UPDATE_APP, 0 ) ) );
+
+		JTextField ftlDatsPathField = editorPanel.getChooser( FTL_DATS_PATH ).getTextField();
+		ftlDatsPathField.setText( appConfig.getProperty( SlipstreamConfig.FTL_DATS_PATH, "" ) );
+		ftlDatsPathField.setPreferredSize( new Dimension( 150, ftlDatsPathField.getPreferredSize().height ) );
+		editorPanel.getChooser( FTL_DATS_PATH ).getButton().addActionListener( this );
+
+		JTextField steamExePathField = editorPanel.getChooser( STEAM_EXE_PATH ).getTextField();
+		steamExePathField.setText( appConfig.getProperty( SlipstreamConfig.STEAM_EXE_PATH, "" ) );
+		steamExePathField.setPreferredSize( new Dimension( 150, steamExePathField.getPreferredSize().height ) );
+		editorPanel.getChooser( STEAM_EXE_PATH ).getButton().addActionListener( this );
+
+		JPanel ctrlPanel = new JPanel();
+		ctrlPanel.setLayout( new BoxLayout( ctrlPanel, BoxLayout.X_AXIS ) );
+		ctrlPanel.setBorder( BorderFactory.createEmptyBorder( 10, 0, 10, 0 ) );
+		ctrlPanel.add( Box.createHorizontalGlue() );
+		applyBtn = new JButton( "Apply" );
+		applyBtn.addActionListener( this );
+		ctrlPanel.add( applyBtn );
+		ctrlPanel.add( Box.createHorizontalGlue() );
+
+		final JScrollPane editorScroll = new JScrollPane( editorPanel );
+		editorScroll.setVerticalScrollBarPolicy( ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS );
+		editorScroll.getVerticalScrollBar().setUnitIncrement( 10 );
+		int vbarWidth = editorScroll.getVerticalScrollBar().getPreferredSize().width;
+		editorScroll.setPreferredSize( new Dimension( editorPanel.getPreferredSize().width+vbarWidth+5, 400 ) );
+
+		JPanel contentPane = new JPanel( new BorderLayout() );
+		contentPane.add( editorScroll, BorderLayout.CENTER );
+		contentPane.add( ctrlPanel, BorderLayout.SOUTH );
+		this.setContentPane( contentPane );
+		this.pack();
+		this.setMinimumSize( new Dimension( 250, 250 ) );
+
+
+		editorScroll.addAncestorListener(new AncestorListener() {
+			@Override
+			public void ancestorAdded( AncestorEvent e ) {
+				editorScroll.getViewport().setViewPosition( new Point( 0, 0 ) );
+			}
+			@Override
+			public void ancestorMoved( AncestorEvent e ) {
+			}
+			@Override
+			public void ancestorRemoved( AncestorEvent e ) {
+			}
+		});
+	}
+
+	@Override
+	public void actionPerformed( ActionEvent e ) {
+		Object source = e.getSource();
+
+		if ( source == applyBtn ) {
+			String tmp;
+			appConfig.setProperty( SlipstreamConfig.ALLOW_ZIP, editorPanel.getBoolean( ALLOW_ZIP ).isSelected() ? "true" : "false" );
+			appConfig.setProperty( SlipstreamConfig.RUN_STEAM_FTL, editorPanel.getBoolean( RUN_STEAM_FTL ).isSelected() ? "true" : "false" );
+			appConfig.setProperty( SlipstreamConfig.NEVER_RUN_FTL, editorPanel.getBoolean( NEVER_RUN_FTL ).isSelected() ? "true" : "false" );
+			appConfig.setProperty( SlipstreamConfig.USE_DEFAULT_UI, editorPanel.getBoolean( USE_DEFAULT_UI ).isSelected() ? "true" : "false" );
+			appConfig.setProperty( SlipstreamConfig.REMEMBER_GEOMETRY, editorPanel.getBoolean( REMEMBER_GEOMETRY ).isSelected() ? "true" : "false" );
+
+			tmp = editorPanel.getInt( UPDATE_CATALOG ).getText();
+			try {
+				int n = Integer.parseInt( tmp );
+				n = Math.max( 0, n );
+				appConfig.setProperty( SlipstreamConfig.UPDATE_CATALOG, Integer.toString( n ) );
+			}
+			catch ( NumberFormatException f ) {}
+
+			tmp = editorPanel.getInt( UPDATE_APP ).getText();
+			try {
+				int n = Integer.parseInt( tmp );
+				n = Math.max( 0, n );
+				appConfig.setProperty( SlipstreamConfig.UPDATE_APP, Integer.toString( n ) );
+			}
+			catch ( NumberFormatException f ) {}
+
+			tmp = editorPanel.getChooser( FTL_DATS_PATH ).getTextField().getText();
+			if ( tmp.length() > 0 && FTLUtilities.isDatsDirValid( new File( tmp ) ) ) {
+				appConfig.setProperty( SlipstreamConfig.FTL_DATS_PATH, tmp );
+			}
+
+			tmp = editorPanel.getChooser( STEAM_EXE_PATH ).getTextField().getText();
+			if ( tmp.length() > 0 && new File( tmp ).exists() ) {
+				appConfig.setProperty( SlipstreamConfig.STEAM_EXE_PATH, tmp );
+			}
+
+			this.setVisible( false );
+			this.dispose();
+		}
+		else if ( source == editorPanel.getChooser( FTL_DATS_PATH ).getButton() ) {
+			File datsDir = FTLUtilities.promptForDatsDir( this );
+			if ( datsDir != null ) {
+				editorPanel.getChooser( FTL_DATS_PATH ).getTextField().setText( datsDir.getAbsolutePath() );
+			}
+		}
+		else if ( source == editorPanel.getChooser( STEAM_EXE_PATH ).getButton() ) {
+			String currentPath = editorPanel.getChooser( STEAM_EXE_PATH ).getTextField().getText();
+
+			JFileChooser steamExeChooser = new JFileChooser();
+			steamExeChooser.setDialogTitle( "Find Steam.exe or steam or Steam.app" );
+			steamExeChooser.setFileHidingEnabled( false );
+			steamExeChooser.setMultiSelectionEnabled( false );
+			if ( currentPath.length() > 0 ) {
+				steamExeChooser.setCurrentDirectory( new File( currentPath ) );
+			}
+
+			if ( steamExeChooser.showOpenDialog( null ) == JFileChooser.APPROVE_OPTION ) {
+				File steamExeFile = steamExeChooser.getSelectedFile();
+				if ( steamExeFile.exists() ) {
+					editorPanel.getChooser( STEAM_EXE_PATH ).getTextField().setText( steamExeFile.getAbsolutePath() );
+				}
+			}
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/Statusbar.java

@@ -0,0 +1,6 @@
+package net.vhati.modmanager.ui;
+
+
+public interface Statusbar {
+	public void setStatusText( String text );
+}

src/main/java/net/vhati/modmanager/ui/StatusbarMouseListener.java

@@ -0,0 +1,38 @@
+package net.vhati.modmanager.ui;
+
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+
+import net.vhati.modmanager.ui.Statusbar;
+
+
+/**
+ * A MouseListener to show rollover help text in a status bar.
+ *
+ * Construct this with the help text, and a class
+ * implementing the Statusbar interface.
+ *
+ * Then add this mouseListener to a component.
+ */
+public class StatusbarMouseListener extends MouseAdapter {
+
+	protected Statusbar bar = null;
+	protected String text = null;
+
+
+	public StatusbarMouseListener( Statusbar bar, String text ) {
+		this.bar = bar;
+		this.text = text;
+	}
+
+	@Override
+	public void mouseEntered( MouseEvent e ) {
+		bar.setStatusText( text );
+	}
+
+	@Override
+	public void mouseExited( MouseEvent e ) {
+		bar.setStatusText( "" );
+	}
+}

src/main/java/net/vhati/modmanager/ui/table/ChecklistTableModel.java

@@ -0,0 +1,117 @@
+package net.vhati.modmanager.ui.table;
+
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.table.AbstractTableModel;
+
+import net.vhati.modmanager.core.ModInfo;
+import net.vhati.modmanager.ui.table.Reorderable;
+
+
+public class ChecklistTableModel<T> extends AbstractTableModel implements Reorderable {
+
+	private static final int COLUMN_CHECK = 0;
+	private static final int COLUMN_PAYLOAD = 1;
+
+	private static final int DATA_CHECK = 0;
+	private static final int DATA_PAYLOAD = 1;
+
+	private String[] columnNames = new String[] {"?", "Name"};
+	private Class[] columnTypes = new Class[] {Boolean.class, String.class};
+
+	private List<List<Object>> rowsList = new ArrayList<List<Object>>();
+
+
+	public void addItem( T o ) {
+		insertItem( rowsList.size(), false, o );
+	}
+
+	public void insertItem( int row, boolean selected, T o ) {
+		int newRowIndex = rowsList.size();
+
+		List<Object> rowData = new ArrayList<Object>();
+		rowData.add( new Boolean(selected) );
+		rowData.add( o );
+		rowsList.add( row, rowData );
+
+		fireTableRowsInserted( row, row );
+	}
+
+	public void removeItem( int row ) {
+		rowsList.remove( row );
+		fireTableRowsDeleted( row, row );
+	}
+
+	public void removeAllItems() {
+		rowsList.clear();
+		fireTableDataChanged();
+	}
+
+	@SuppressWarnings("unchecked")
+	public T getItem( int row ) {
+		return (T)rowsList.get(row).get( DATA_PAYLOAD );
+	}
+
+	@Override
+	public void reorder( int fromRow, int toRow ) {
+		if ( toRow > fromRow ) toRow--;
+		List<Object> rowData = rowsList.get( fromRow );
+		rowsList.remove( fromRow );
+		fireTableRowsDeleted( fromRow, fromRow );
+		rowsList.add( toRow, rowData );
+		fireTableRowsInserted( toRow, toRow );
+	}
+
+	public void setSelected( int row, boolean b ) {
+		rowsList.get(row).set( DATA_CHECK, new Boolean( b ) );
+		fireTableRowsUpdated( row, row );
+	}
+
+	@SuppressWarnings("unchecked")
+	public boolean isSelected( int row ) {
+		return ((Boolean)rowsList.get( row ).get( DATA_CHECK )).booleanValue();
+	}
+
+	@Override
+	public int getColumnCount() {
+		return columnNames.length;
+	}
+
+	@Override
+	public int getRowCount() {
+		return rowsList.size();
+	}
+
+	@Override
+	public Object getValueAt( int row, int column ) {
+		if ( column == COLUMN_CHECK ) {
+			return rowsList.get( row ).get( DATA_CHECK );
+		}
+		else if ( column == COLUMN_PAYLOAD ) {
+			Object o = rowsList.get( row ).get( DATA_PAYLOAD );
+			return o.toString();
+		}
+		throw new ArrayIndexOutOfBoundsException();
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public void setValueAt( Object o, int row, int column ) {
+		if ( column == COLUMN_CHECK ) {
+			Boolean bool = (Boolean)o;
+			rowsList.get(row).set( DATA_CHECK, bool );
+			fireTableRowsUpdated( row, row );
+		}
+	}
+
+	@Override
+	public boolean isCellEditable( int row, int column ) {
+		if ( column == COLUMN_CHECK ) return true;
+		return false;
+	}
+
+	@Override
+	public Class getColumnClass( int column ) {
+		return columnTypes[column];
+	}
+}

src/main/java/net/vhati/modmanager/ui/table/ChecklistTablePanel.java

@@ -0,0 +1,136 @@
+package net.vhati.modmanager.ui.table;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.DropMode;
+import javax.swing.ListSelectionModel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTable;
+
+import net.vhati.modmanager.core.ModFileInfo;
+import net.vhati.modmanager.ui.table.ChecklistTableModel;
+import net.vhati.modmanager.ui.table.TableRowTransferHandler;
+
+
+public class ChecklistTablePanel<T> extends JPanel {
+
+	protected ChecklistTableModel<T>tableModel;
+	protected JTable table;
+
+
+	public ChecklistTablePanel() {
+		super( new BorderLayout() );
+
+		tableModel = new ChecklistTableModel<T>();
+
+		table = new JTable( tableModel );
+		table.setFillsViewportHeight( true );
+		table.setSelectionMode( ListSelectionModel.SINGLE_SELECTION );
+		table.setTableHeader( null );
+		table.getColumnModel().getColumn( 0 ).setMinWidth( 30 );
+		table.getColumnModel().getColumn( 0 ).setMaxWidth( 30 );
+		table.getColumnModel().getColumn( 0 ).setPreferredWidth( 30 );
+
+		JScrollPane scrollPane = new JScrollPane( null, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
+		scrollPane.setViewportView( table );
+		//scrollPane.setColumnHeaderView( null );  // Counterpart to setTableHeader().
+		scrollPane.setPreferredSize( new Dimension( Integer.MIN_VALUE, Integer.MIN_VALUE ) );
+		this.add( scrollPane, BorderLayout.CENTER );
+
+
+		// Double-click toggles checkboxes.
+		table.addMouseListener(new MouseAdapter() {
+			int prevRow = -1;
+			int streak = 0;
+
+			@Override
+			public void mouseClicked( MouseEvent e ) {
+				if ( e.getSource() != table ) return;
+				int thisRow = table.rowAtPoint( e.getPoint() );
+
+				// Reset on first click and when no longer on that row.
+				if ( e.getClickCount() == 1 ) prevRow = -1;
+
+				if ( thisRow != prevRow || thisRow == -1 ) {
+					streak = 1;
+					prevRow = thisRow;
+					return;
+				}
+				else {
+					streak++;
+				}
+				if ( streak % 2 != 0 ) return;  // Respond only to click pairs.
+
+				// Don't further toggle a multi-clicked checkbox.
+				int viewCol = table.columnAtPoint( e.getPoint() );
+				int modelCol = table.getColumnModel().getColumn( viewCol ).getModelIndex();
+				if ( modelCol == 0 ) return;
+
+				int selRow = table.getSelectedRow();
+				if ( selRow != -1 ) {
+					boolean selected = tableModel.isSelected( selRow );
+					tableModel.setSelected( selRow, !selected );
+				}
+			}
+		});
+
+		table.setTransferHandler( new TableRowTransferHandler( table ) );
+		table.setDropMode( DropMode.INSERT );  // Drop between rows, not on them.
+		table.setDragEnabled( true );
+	}
+
+
+	public void clear() {
+		tableModel.removeAllItems();
+	}
+
+
+	public List<T> getAllItems() {
+		List<T> results = new ArrayList<T>();
+
+		for ( int i=0; i < tableModel.getRowCount(); i++ ) {
+			results.add( tableModel.getItem( i ) );
+		}
+
+		return results;
+	}
+
+	public List<T> getSelectedItems() {
+		List<T> results = new ArrayList<T>();
+
+		for ( int i=0; i < tableModel.getRowCount(); i++ ) {
+			if ( tableModel.isSelected( i ) ) {
+				results.add( tableModel.getItem( i ) );
+			}
+		}
+
+		return results;
+	}
+
+
+	public void toggleAllItemSelection() {
+		int selectedCount = 0;
+		for ( int i = tableModel.getRowCount()-1; i >= 0; i-- ) {
+			if ( tableModel.isSelected( i ) ) selectedCount++;
+		}
+		boolean b = ( selectedCount != tableModel.getRowCount() );
+
+		for ( int i = tableModel.getRowCount()-1; i >= 0; i-- ) {
+			tableModel.setSelected( i, b );
+		}
+	}
+
+
+	public ChecklistTableModel<T> getTableModel() {
+		return tableModel;
+	}
+
+	public JTable getTable() {
+		return table;
+	}
+}

src/main/java/net/vhati/modmanager/ui/table/ListState.java

@@ -0,0 +1,39 @@
+package net.vhati.modmanager.ui.table;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+
+/**
+ * An implementation-agnostic model to pass between the GUI thread and the
+ * (de)serializer.
+ */
+public class ListState<T> {
+
+	protected List<T> items = new ArrayList<T>();
+
+
+	public ListState() {
+	}
+
+
+	public void addItem( T item ) {
+		items.add( item );
+	}
+
+	/**
+	 * Returns a new list containing items in this state.
+	 */
+	public List<T> getItems() {
+		return new ArrayList<T>( items );
+	}
+
+	public void removeItem( T item ) {
+		items.remove( item );
+	}
+
+	public boolean containsItem( T item ) {
+		return items.contains( item );
+	}
+}

src/main/java/net/vhati/modmanager/ui/table/Reorderable.java

@@ -0,0 +1,9 @@
+package net.vhati.modmanager.ui.table;
+
+
+public interface Reorderable {
+	/**
+	 * Moves an element at fromIndex to toIndex.
+	 */
+	public void reorder( int fromIndex, int toIndex );
+}

src/main/java/net/vhati/modmanager/ui/table/TableRowTransferHandler.java

@@ -0,0 +1,131 @@
+package net.vhati.modmanager.ui.table;
+
+import java.awt.Cursor;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.dnd.DragSource;
+import javax.swing.JComponent;
+import javax.swing.JTable;
+import javax.swing.TransferHandler;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.vhati.modmanager.ui.table.Reorderable;
+
+
+/**
+ * Allows drag and drop reordering of JTable rows.
+ *
+ * Its TableModel must implement the Reorderable interface.
+ */
+public class TableRowTransferHandler extends TransferHandler {
+
+	private static final Logger log = LoggerFactory.getLogger( TableRowTransferHandler.class );
+
+	private DataFlavor localIntegerFlavor = null;
+
+	private JTable table = null;
+
+
+	public TableRowTransferHandler( JTable table ) {
+		super();
+		if ( table.getModel() instanceof Reorderable == false ) {
+			throw new IllegalArgumentException( "The tableModel doesn't implement Reorderable." );
+		}
+		this.table = table;
+
+		try {
+			localIntegerFlavor = new DataFlavor( String.format( "%s;class=\"%s\"", DataFlavor.javaJVMLocalObjectMimeType, Integer.class.getName() ) );
+		}
+		catch ( ClassNotFoundException e ) {
+			log.error( "Failed to construct a table row transfer handler", e );
+		}
+	}
+
+	@Override
+	protected Transferable createTransferable( JComponent c ) {
+		assert ( c == table );
+		int row = table.getSelectedRow();
+		return new IntegerTransferrable( new Integer( row ) );
+	}
+
+	@Override
+	public boolean canImport( TransferHandler.TransferSupport ts ) {
+		boolean b = ( ts.getComponent() == table && ts.isDrop() && ts.isDataFlavorSupported( localIntegerFlavor ) );
+		table.setCursor( b ? DragSource.DefaultMoveDrop : DragSource.DefaultMoveNoDrop );
+		return b;
+	}
+
+	@Override
+	public int getSourceActions( JComponent comp ) {
+		return TransferHandler.MOVE;
+	}
+
+	@Override
+	@SuppressWarnings("Unchecked")
+	public boolean importData( TransferHandler.TransferSupport ts ) {
+		if ( !canImport( ts ) ) return false;
+
+		JTable target = (JTable)ts.getComponent();
+		JTable.DropLocation dl = (JTable.DropLocation)ts.getDropLocation();
+		int dropRow = dl.getRow();
+		int rowCount = table.getModel().getRowCount();
+		if ( dropRow < 0 || dropRow > rowCount ) dropRow = rowCount;
+
+		target.setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR ) );
+		try {
+			Integer draggedRow = (Integer)ts.getTransferable().getTransferData( localIntegerFlavor );
+			if ( draggedRow != -1 && draggedRow != dropRow ) {
+				((Reorderable)table.getModel()).reorder( draggedRow, dropRow );
+				if ( dropRow > draggedRow ) dropRow--;
+				target.getSelectionModel().addSelectionInterval( dropRow, dropRow );
+				return true;
+			}
+		}
+		catch ( Exception e ) {
+			log.error( "Dragging failed", e );
+		}
+		return false;
+	}
+
+	@Override
+	protected void exportDone( JComponent source, Transferable data, int action ) {
+		if ( action == TransferHandler.MOVE || action == TransferHandler.NONE ) {
+			table.setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR ) );
+		}
+	}
+
+
+
+	/**
+	 * Drag and drop Integer data, constructed with a raw object
+	 * from a drag source, to be transformed into a flavor
+	 * suitable for the drop target.
+	 */
+	private class IntegerTransferrable implements Transferable {
+		private Integer data;
+
+		public IntegerTransferrable( Integer data ) {
+			this.data = data;
+		}
+
+		@Override
+		public Object getTransferData( DataFlavor flavor ) {
+			if ( flavor.equals( localIntegerFlavor ) ) {
+				return data;
+			}
+			return null;
+		}
+
+		@Override
+		public DataFlavor[] getTransferDataFlavors() {
+			return new DataFlavor[] {localIntegerFlavor};
+		}
+
+		@Override
+		public boolean isDataFlavorSupported( DataFlavor flavor ) {
+			return flavor.equals( localIntegerFlavor );
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/ChecklistTreeCellRenderer.java

@@ -0,0 +1,91 @@
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.BorderLayout;
+import java.awt.Component;
+import javax.swing.JPanel;
+import javax.swing.JTree;
+import javax.swing.tree.TreeCellRenderer;
+import javax.swing.tree.TreePath;
+
+import net.vhati.modmanager.ui.tree.ChecklistTreePathFilter;
+import net.vhati.modmanager.ui.tree.ChecklistTreeSelectionModel;
+import net.vhati.modmanager.ui.tree.TristateCheckBox;
+import net.vhati.modmanager.ui.tree.TristateButtonModel.TristateState;
+
+
+/**
+ * A cell renderer that augments an existing renderer with a checkbox.
+ */
+public class ChecklistTreeCellRenderer extends JPanel implements TreeCellRenderer {
+
+	protected ChecklistTreeSelectionModel selectionModel;
+	protected ChecklistTreePathFilter checklistFilter;
+	protected TreeCellRenderer delegate;
+	protected TristateCheckBox checkbox = new TristateCheckBox();
+	protected int checkMaxX = 0;
+
+
+	/**
+	 * Constructor.
+	 *
+	 * @param delegate  a traditional TreeCellRenderer
+	 * @param selectionModel  a model to query for checkbox states
+	 * @param checklistFilter  a TreePath filter, or null to always show a checkbox
+	 */
+	public ChecklistTreeCellRenderer( TreeCellRenderer delegate, ChecklistTreeSelectionModel selectionModel, ChecklistTreePathFilter checklistFilter ) {
+		super();
+		this.delegate = delegate;
+		this.selectionModel = selectionModel;
+		this.checklistFilter = checklistFilter;
+
+		this.setLayout( new BorderLayout() );
+		this.setOpaque( false );
+		checkbox.setOpaque( false );
+
+		checkMaxX = checkbox.getPreferredSize().width;
+	}
+
+
+	@Override
+	public Component getTreeCellRendererComponent( JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus ) {
+		this.removeAll();
+		checkbox.setState( TristateState.DESELECTED );
+
+		Component delegateComp = delegate.getTreeCellRendererComponent( tree, value, sel, expanded, leaf, row, hasFocus );
+
+		TreePath path = tree.getPathForRow( row );
+		if ( path != null ) {
+			if ( selectionModel.isPathSelected( path, selectionModel.isDigged() ) ) {
+				checkbox.setState( TristateState.SELECTED );
+			} else {
+				checkbox.setState( ( selectionModel.isDigged() && selectionModel.isPartiallySelected( path ) ) ? TristateState.INDETERMINATE : TristateState.DESELECTED );
+			}
+		}
+		checkbox.setVisible( path == null || checklistFilter == null || checklistFilter.isSelectable( path ) );
+		checkbox.setEnabled( tree.isEnabled() );
+
+		this.add( checkbox, BorderLayout.WEST );
+		this.add( delegateComp, BorderLayout.CENTER );
+		return this;
+	}
+
+
+	public void setDelegate( TreeCellRenderer delegate ) {
+		this.delegate = delegate;
+	}
+
+	public TreeCellRenderer getDelegate() {
+		return delegate;
+	}
+
+
+	/**
+	 * Returns the checkbox's right edge (in the renderer component's coordinate space).
+	 *
+	 * Values less than that can be interpreted as within the checkbox's bounds.
+	 * X=0 is the renderer component's left edge.
+	 */
+	public int getCheckboxMaxX() {
+		return checkMaxX;
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/ChecklistTreeManager.java

@@ -0,0 +1,129 @@
+/**
+ * Based on CheckTreeManager (rev 120, 2007-07-20)
+ * By Santhosh Kumar T
+ * https://java.net/projects/myswing
+ *
+ * https://java.net/projects/myswing/sources/svn/content/trunk/src/skt/swing/tree/check/CheckTreeManager.java?rev=120
+ */
+
+/**
+ * MySwing: Advanced Swing Utilites
+ * Copyright (C) 2005  Santhosh Kumar T
+ * <p/>
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * <p/>
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import javax.swing.JTree;
+import javax.swing.event.TreeSelectionEvent;
+import javax.swing.event.TreeSelectionListener;
+import javax.swing.tree.TreePath;
+
+import net.vhati.modmanager.ui.tree.ChecklistTreePathFilter;
+import net.vhati.modmanager.ui.tree.ChecklistTreeSelectionModel;
+
+
+public class ChecklistTreeManager extends MouseAdapter implements TreeSelectionListener {
+
+	private ChecklistTreeSelectionModel selectionModel;
+	private ChecklistTreePathFilter checklistFilter;
+	protected JTree tree = new JTree();
+	protected int checkMaxX = 0;
+
+
+	/**
+	 * Constructor.
+	 *
+	 * Modifies a given tree to add checkboxes.
+	 * - The tree's existing cell renderer will be wrapped with a ChecklistTreeCellRenderer.
+	 * - A MouseListener will be added to the tree to detect clicks, which will toggle checkboxes.
+	 *
+	 * A secondary ChecklistTreeSelectionModel will track checkboxes' states (independent of row
+	 * highlighting).
+	 *
+	 * @param tree  a tree to modify
+	 * @param dig  true show that a node is partially selected by scanning its descendents, false otherwise
+	 * @checklistFilter  a filter to decide which TreePaths need checkboxes, or null
+	 */
+	public ChecklistTreeManager( JTree tree, boolean dig, ChecklistTreePathFilter checklistFilter ) {
+		this.tree = tree;
+		this.checklistFilter = checklistFilter;
+
+		// Note: If largemodel is not set then treenodes are getting truncated.
+		// Need to debug further to find the problem.
+		if ( checklistFilter != null ) tree.setLargeModel( true );
+
+		selectionModel = new ChecklistTreeSelectionModel( tree.getModel(), dig );
+
+		ChecklistTreeCellRenderer checklistRenderer = new ChecklistTreeCellRenderer( tree.getCellRenderer(), selectionModel, checklistFilter );
+		setCheckboxMaxX( checklistRenderer.getCheckboxMaxX() );
+		tree.setCellRenderer( checklistRenderer );
+
+		selectionModel.addTreeSelectionListener( this );
+		tree.addMouseListener( this );
+	}
+
+
+	/**
+	 * Sets the checkbox's right edge (in the TreeCellRenderer component's coordinate space).
+	 *
+	 * Values less than that will be interpreted as within the checkbox's bounds.
+	 * X=0 is the renderer component's left edge.
+	 */
+	public void setCheckboxMaxX( int x ) {
+		checkMaxX = x;
+	}
+
+
+	public ChecklistTreePathFilter getChecklistFilter() {
+		return checklistFilter;
+	}
+
+
+	public ChecklistTreeSelectionModel getSelectionModel() {
+		return selectionModel;
+	}
+
+
+	@Override
+	public void mouseClicked( MouseEvent e ) {
+		TreePath path = tree.getPathForLocation( e.getX(), e.getY() );
+		if ( path == null ) return;
+
+		if ( e.getX() > tree.getPathBounds(path).x + checkMaxX ) return;
+
+		if ( checklistFilter != null && !checklistFilter.isSelectable(path) ) return;
+
+		boolean selected = selectionModel.isPathSelected( path, selectionModel.isDigged() );
+		selectionModel.removeTreeSelectionListener( this );
+
+		try {
+			if ( selected ) {
+				selectionModel.removeSelectionPath( path );
+			} else {
+				selectionModel.addSelectionPath( path );
+			}
+		}
+		finally {
+			selectionModel.addTreeSelectionListener( this );
+			tree.treeDidChange();
+		}
+	}
+
+
+	@Override
+	public void valueChanged( TreeSelectionEvent e ) {
+		tree.treeDidChange();
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/ChecklistTreePanel.java

@@ -0,0 +1,196 @@
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.BorderLayout;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
+import javax.swing.DropMode;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTree;
+import javax.swing.SwingUtilities;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.TreePath;
+import javax.swing.tree.TreeSelectionModel;
+
+import net.vhati.modmanager.ui.tree.ChecklistTreeManager;
+import net.vhati.modmanager.ui.tree.ChecklistTreeSelectionModel;
+import net.vhati.modmanager.ui.tree.TreeTransferHandler;
+
+
+public class ChecklistTreePanel extends JPanel {
+
+	private DefaultTreeModel treeModel = null;
+	private JTree tree = null;
+	private ChecklistTreeManager checklistManager = null;
+
+
+	public ChecklistTreePanel() {
+		super( new BorderLayout() );
+
+		DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode( "Root", true );
+		treeModel = new DefaultTreeModel( rootNode, true );
+		tree = new JTree( treeModel );
+		tree.setCellRenderer( new DefaultTreeCellRenderer() );
+		tree.setRootVisible( false );
+		tree.getSelectionModel().setSelectionMode( TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION );
+		checklistManager = new ChecklistTreeManager( tree, true, null );
+
+		JScrollPane scrollPane = new JScrollPane( tree, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED );
+		this.add( scrollPane, BorderLayout.CENTER );
+
+		tree.setTransferHandler( new TreeTransferHandler( tree ) );
+		tree.setDropMode( DropMode.ON_OR_INSERT );  // Drop between rows, or onto groups.
+		tree.setDragEnabled( true );
+	}
+
+
+	/**
+	 * Returns all userObjects of nodes with ticked checkboxes (except root itself).
+	 */
+	public List<Object> getSelectedUserObjects() {
+		ChecklistTreeSelectionModel checklistSelectionModel = checklistManager.getSelectionModel();
+		List<Object> results = new ArrayList<Object>();
+
+		for ( Enumeration enumer = checklistSelectionModel.getAllSelectedPaths(); enumer.hasMoreElements(); ) {
+			DefaultMutableTreeNode childNode = (DefaultMutableTreeNode)enumer.nextElement();
+			if ( !childNode.isRoot() && childNode.getUserObject() != null ) {
+				results.add( childNode.getUserObject() );
+			}
+		}
+
+		return results;
+	}
+
+	/**
+	 * Returns all userObjects of all nodes (except root itself).
+	 */
+	public List<Object> getAllUserObjects() {
+		List<Object> results = new ArrayList<Object>();
+
+		DefaultMutableTreeNode rootNode = (DefaultMutableTreeNode)treeModel.getRoot();
+		getAllUserObjects( rootNode, results );
+
+		return results;
+	}
+
+	private void getAllUserObjects( DefaultMutableTreeNode currentNode, List<Object> results ) {
+		if ( !currentNode.isRoot() && currentNode.getUserObject() != null ) {
+			results.add( currentNode.getUserObject() );
+		}
+
+		for ( Enumeration enumer = currentNode.children(); enumer.hasMoreElements(); ) {
+			DefaultMutableTreeNode childNode = (DefaultMutableTreeNode)enumer.nextElement();
+			getAllUserObjects( currentNode, results );
+		}
+	}
+
+
+	public void clear() {
+		DefaultMutableTreeNode rootNode = (DefaultMutableTreeNode)treeModel.getRoot();
+		rootNode.removeAllChildren();
+		treeModel.reload();
+	}
+
+
+	/**
+	 * Adds a group to consolidate mods.
+	 *
+	 * TODO: Trigger a rename.
+	 */
+	public void addGroup() {
+		DefaultMutableTreeNode rootNode = (DefaultMutableTreeNode)treeModel.getRoot();
+		DefaultMutableTreeNode groupNode = new DefaultMutableTreeNode( "New Group", true );
+		rootNode.add( groupNode );
+		treeModel.nodesWereInserted( rootNode, new int[]{rootNode.getIndex( groupNode )} );
+	}
+
+	/**
+	 * Disband selected groups.
+	 *
+	 * TODO
+	 */
+	public void removeSelectedGroups() {
+	}
+
+	/**
+	 * Rename last selected group.
+	 *
+	 * TODO
+	 */
+	public void  renameSelectedGroup() {
+	}
+
+
+	/**
+	 * Cycles through ticking all checkboxes and clearing them.
+	 */
+	public void toggleAllNodeSelection() {
+	}
+
+	/**
+	 * Cycles through expanding all nodes and collapsing them.
+	 */
+	public void toggleAllNodeExpansion() {
+		boolean canExpand = false;
+		boolean canCollapse = false;
+
+		for ( int i = tree.getRowCount()-1; i >= 0; i-- ) {
+			if ( tree.isCollapsed( i ) ) {
+				canExpand = true;
+			}
+			else if ( tree.isExpanded( i ) ) {
+				canCollapse = true;
+			}
+		}
+
+		if ( canExpand ) {
+			expandAllNodes( tree.getRowCount() );
+		}
+		else if ( canCollapse ) {
+			collapseAllNodes( new TreePath( treeModel.getRoot() ) );
+		}
+	}
+
+	/**
+	 * Expands all nodes by repeatedly expanding until the row count stops
+	 * growing.
+	 */
+	public void expandAllNodes( int prevRowCount ) {
+		for ( int i=0; i < prevRowCount; i++ ) {
+			tree.expandRow( i );
+		}
+		if ( tree.getRowCount() != prevRowCount ) {
+			expandAllNodes( tree.getRowCount() );
+		}
+	}
+
+	/**
+	 * Collapses all nodes by walking the TreeModel.
+	 */
+	public void collapseAllNodes( TreePath currentPath ) {
+		Object currentNode = currentPath.getLastPathComponent();
+		for ( int i = treeModel.getChildCount( currentNode )-1; i >= 0; i-- ) {
+			Object childNode = treeModel.getChild( currentNode, i );
+			TreePath childPath = currentPath.pathByAddingChild( childNode );
+			collapseAllNodes( childPath );
+		}
+		if ( currentNode != treeModel.getRoot() ) tree.collapsePath( currentPath );
+	}
+
+
+	public JTree getTree() {
+		return tree;
+	}
+
+	public DefaultTreeModel getTreeModel() {
+		return treeModel;
+	}
+
+	public ChecklistTreeManager getChecklistManager() {
+		return checklistManager;
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/ChecklistTreePathFilter.java

@@ -0,0 +1,13 @@
+package net.vhati.modmanager.ui.tree;
+
+import javax.swing.tree.TreePath;
+
+
+/**
+ * Decides whether a given TreePath should have a checkbox.
+ */
+public interface ChecklistTreePathFilter {
+
+	public boolean isSelectable( TreePath path );
+
+}

src/main/java/net/vhati/modmanager/ui/tree/ChecklistTreeSelectionModel.java

@@ -0,0 +1,265 @@
+/*
+ * Based on CheckTreeSelectionModel (rev 120, 2007-07-20)
+ * By Santhosh Kumar T
+ * https://java.net/projects/myswing
+ *
+ * https://java.net/projects/myswing/sources/svn/content/trunk/src/skt/swing/tree/check/CheckTreeSelectionModel.java?rev=120
+ */
+
+/**
+ * MySwing: Advanced Swing Utilites
+ * Copyright (C) 2005  Santhosh Kumar T
+ * <p/>
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * <p/>
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Stack;
+import javax.swing.tree.DefaultTreeSelectionModel;
+import javax.swing.tree.TreeModel;
+import javax.swing.tree.TreePath;
+import javax.swing.tree.TreeSelectionModel;
+
+import net.vhati.modmanager.ui.tree.PreorderEnumeration;
+
+
+public class ChecklistTreeSelectionModel extends DefaultTreeSelectionModel {
+
+	private TreeModel model;
+	private boolean dig = true;
+
+
+	public ChecklistTreeSelectionModel( TreeModel model, boolean dig ) {
+		this.model = model;
+		this.dig = dig;
+		this.setSelectionMode( TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION );
+	}
+
+	public boolean isDigged() {
+		return dig;
+	}
+
+
+	/**
+	 * Returns true if path1 is a descendant of path2.
+	 */
+	private boolean isDescendant( TreePath path1, TreePath path2 ) {
+		Object obj1[] = path1.getPath();
+		Object obj2[] = path2.getPath();
+		for ( int i=0; i < obj2.length; i++ ) {
+			if ( obj1[i] != obj2[i] ) return false;
+		}
+		return true;
+	}
+
+
+	/**
+	 * Returns true a selected node exists in the subtree of a given unselected path.
+	 * Returns false if the given path is itself selected.
+	 */
+	public boolean isPartiallySelected( TreePath path ) {
+		if ( isPathSelected( path, true ) ) return false;
+
+		TreePath[] selectionPaths = getSelectionPaths();
+		if( selectionPaths == null ) return false;
+
+		for ( int j=0; j < selectionPaths.length; j++ ) {
+			if ( isDescendant( selectionPaths[j], path ) ) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Returns true if a given path is selected.
+	 *
+	 * If dig is true, then the path is assumed to be selected, if
+	 * one of its ancestors is selected.
+	 */
+	public boolean isPathSelected( TreePath path, boolean dig ) {
+		if ( !dig ) return super.isPathSelected( path );
+
+		while ( path != null && !super.isPathSelected( path ) ) {
+			path = path.getParentPath();
+		}
+		return ( path != null );
+	}
+
+
+	@Override
+	public void setSelectionPaths( TreePath[] paths ) {
+		if ( dig ) {
+			throw new UnsupportedOperationException();
+		} else {
+			super.setSelectionPaths( paths );
+		}
+	}
+
+	@Override
+	public void addSelectionPaths( TreePath[] paths ) {
+		if ( !dig ) {
+			super.addSelectionPaths( paths );
+			return;
+		}
+
+		// Unselect all descendants of paths[].
+		for( int i=0; i < paths.length; i++ ) {
+			TreePath path = paths[i];
+			TreePath[] selectionPaths = getSelectionPaths();
+			if ( selectionPaths == null ) break;
+
+			List<TreePath> toBeRemoved = new ArrayList<TreePath>();
+			for ( int j=0; j < selectionPaths.length; j++ ) {
+				if ( isDescendant( selectionPaths[j], path ) ) {
+					toBeRemoved.add( selectionPaths[j] );
+				}
+			}
+			super.removeSelectionPaths( (TreePath[])toBeRemoved.toArray( new TreePath[0] ) );
+		}
+
+		// If all siblings are selected then unselect them and select parent recursively
+		// otherwize just select that path.
+		for ( int i=0; i < paths.length; i++ ) {
+			TreePath path = paths[i];
+			TreePath temp = null;
+			while ( areSiblingsSelected(path) ) {
+				temp = path;
+				if ( path.getParentPath() == null ) break;
+				path = path.getParentPath();
+			}
+			if ( temp != null ) {
+				if ( temp.getParentPath() != null ) {
+					addSelectionPath( temp.getParentPath() );
+				}
+				else {
+					if ( !isSelectionEmpty() ) {
+						removeSelectionPaths( getSelectionPaths() );
+					}
+					super.addSelectionPaths( new TreePath[]{temp} );
+				}
+			}
+			else {
+				super.addSelectionPaths( new TreePath[]{path} );
+			}
+		}
+	}
+
+	@Override
+	public void removeSelectionPaths( TreePath[] paths ) {
+		if( !dig ) {
+			super.removeSelectionPaths( paths );
+			return;
+		}
+
+		for ( int i=0; i < paths.length; i++ ) {
+			TreePath path = paths[i];
+			if ( path.getPathCount() == 1 ) {
+				super.removeSelectionPaths( new TreePath[]{path} );
+			} else {
+				toggleRemoveSelection( path );
+			}
+		}
+	}
+
+
+	/**
+	 * Returns true if all siblings of given path are selected.
+	 */
+	private boolean areSiblingsSelected( TreePath path ) {
+		TreePath parent = path.getParentPath();
+		if ( parent == null ) return true;
+
+		Object node = path.getLastPathComponent();
+		Object parentNode = parent.getLastPathComponent();
+
+		int childCount = model.getChildCount( parentNode );
+		for ( int i=0; i < childCount; i++ ) {
+			Object childNode = model.getChild( parentNode, i );
+			if ( childNode == node ) continue;
+
+			if ( !isPathSelected( parent.pathByAddingChild( childNode ) ) ) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+
+	/**
+	 * Unselects a given path, toggling ancestors if they were entirely selected.
+	 *
+	 * If any ancestor node of the given path is selected, it will be unselected,
+	 * and all its descendants - except any within the given path - will be selected.
+	 * The ancestor will have gone from fully selected to partially selected.
+	 *
+	 * Otherwise, the given path will be unselected, and nothing else will change.
+	 */
+	private void toggleRemoveSelection( TreePath path ) {
+		Stack<TreePath> stack = new Stack<TreePath>();
+		TreePath parent = path.getParentPath();
+
+		while ( parent != null && !isPathSelected( parent ) ) {
+			stack.push( parent );
+			parent = parent.getParentPath();
+		}
+
+		if ( parent != null ) {
+			stack.push( parent );
+		}
+		else {
+			super.removeSelectionPaths( new TreePath[]{path} );
+			return;
+		}
+
+		while ( !stack.isEmpty() ) {
+			TreePath temp = stack.pop();
+			TreePath peekPath = ( stack.isEmpty() ? path : stack.peek() );
+			Object node = temp.getLastPathComponent();
+			Object peekNode = peekPath.getLastPathComponent();
+
+			int childCount = model.getChildCount( node );
+			for ( int i=0; i < childCount; i++ ) {
+				Object childNode = model.getChild( node, i );
+				if ( childNode != peekNode ) {
+					super.addSelectionPaths( new TreePath[]{temp.pathByAddingChild( childNode )} );
+				}
+			}
+		}
+		super.removeSelectionPaths( new TreePath[]{parent} );
+	}
+
+
+	public Enumeration<TreePath> getAllSelectedPaths() {
+		Enumeration<TreePath> result = null;
+
+		TreePath[] treePaths = getSelectionPaths();
+		if ( treePaths == null ) {
+			List<TreePath> pathsList = Collections.emptyList();
+			result = Collections.enumeration( pathsList );
+		}
+		else {
+			List<TreePath> pathsList = Arrays.asList( treePaths );
+			result = Collections.enumeration( pathsList );
+			if ( dig ) {
+				result = new PreorderEnumeration( result, model );
+			}
+		}
+
+		return result;
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/ChildrenEnumeration.java

@@ -0,0 +1,57 @@
+/**
+ * Based on ChildrenEnumeration (rev 120, 2007-07-20)
+ * By Santhosh Kumar T
+ * https://java.net/projects/myswing
+ *
+ * https://java.net/projects/myswing/sources/svn/content/trunk/src/skt/swing/tree/ChildrenEnumeration.java?rev=120
+ */
+
+/**
+ * MySwing: Advanced Swing Utilites
+ * Copyright (C) 2005  Santhosh Kumar T
+ * <p/>
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * <p/>
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+import javax.swing.tree.TreeModel;
+import javax.swing.tree.TreePath;
+
+
+public class ChildrenEnumeration implements Enumeration<TreePath> {
+
+	private TreePath path;
+	private TreeModel model;
+	private int position = 0;
+	private int childCount;
+
+
+	public ChildrenEnumeration( TreePath path, TreeModel model ) {
+		this.path = path;
+		this.model = model;
+		childCount = model.getChildCount( path.getLastPathComponent() );
+	}
+
+	@Override
+	public boolean hasMoreElements() {
+		return position < childCount;
+	}
+
+	@Override
+	public TreePath nextElement() {
+		if( !hasMoreElements() ) throw new NoSuchElementException();
+
+		return path.pathByAddingChild( model.getChild( path.getLastPathComponent(), position++ ) );
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/PreorderEnumeration.java

@@ -0,0 +1,68 @@
+/**
+ * Based on PreorderEnumeration (rev 120, 2007-07-20)
+ * By Santhosh Kumar T
+ * https://java.net/projects/myswing
+ *
+ * https://java.net/projects/myswing/sources/svn/content/trunk/src/skt/swing/tree/PreorderEnumeration.java?rev=120
+ */
+
+/**
+ * MySwing: Advanced Swing Utilites
+ * Copyright (C) 2005  Santhosh Kumar T
+ * <p/>
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * <p/>
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Stack;
+import javax.swing.tree.TreeModel;
+import javax.swing.tree.TreePath;
+
+
+public class PreorderEnumeration implements Enumeration<TreePath> {
+
+	private TreeModel model;
+	protected Stack<Enumeration<TreePath>> stack = new Stack<Enumeration<TreePath>>();
+
+
+	public PreorderEnumeration( TreePath path, TreeModel model ) {
+		this( Collections.enumeration( Collections.singletonList( path ) ), model );
+	}
+
+	public PreorderEnumeration( Enumeration<TreePath> enumer, TreeModel model ){
+		this.model = model;
+		stack.push( enumer );
+	}
+
+
+	@Override
+	public boolean hasMoreElements() {
+		return ( !stack.empty() && stack.peek().hasMoreElements() );
+	}
+
+	@Override
+	public TreePath nextElement() {
+		Enumeration<TreePath>	enumer = stack.peek();
+		TreePath path = enumer.nextElement();
+
+		if ( !enumer.hasMoreElements() ) stack.pop();
+
+		if ( model.getChildCount( path.getLastPathComponent() ) > 0 ) {
+			stack.push( new ChildrenEnumeration( path, model ) );
+		}
+
+		return path;
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/TreeState.java

@@ -0,0 +1,190 @@
+package net.vhati.modmanager.ui.tree;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+
+/**
+ * An implementation-agnostic model to pass between the GUI thread and the
+ * (de)serializer.
+ */
+public class TreeState {
+
+	protected TreeNodeState rootNodeState = null;
+
+
+	public TreeState() {
+	}
+
+
+	public void setRootNodeState( TreeNodeState rootNodeState ) {
+		this.rootNodeState = rootNodeState;
+	}
+
+	public TreeNodeState getRootNodeState() {
+		return rootNodeState;
+	}
+
+
+	public List<TreeNodeState> findNodeStates( TreeNodeStateFilter filter ) {
+		return findNodeStates( getRootNodeState(), filter );
+	}
+
+	/**
+	 * Returns a list of descendant node states which match a given filter.
+	 */
+	public List<TreeNodeState> findNodeStates( TreeNodeState currentNodeState, TreeNodeStateFilter filter ) {
+		List<TreeNodeState> results = new ArrayList<TreeNodeState>( 1 );
+		collectNodeStates( currentNodeState, filter, results );
+		return results;
+	}
+
+	public boolean collectNodeStates( TreeNodeState currentNodeState, TreeNodeStateFilter filter, List<TreeNodeState> results ) {
+		int maxResultCount = filter.getMaxResultCount();
+		boolean found = false;
+
+		if ( filter.accept( currentNodeState ) ) {
+			results.add( currentNodeState );
+			if ( maxResultCount > 0 && maxResultCount >= results.size() ) return true;
+		}
+
+		if ( currentNodeState.getAllowsChildren() ) {
+			for ( Iterator<TreeNodeState> it = currentNodeState.children(); it.hasNext(); ) {
+				TreeNodeState childNodeState = it.next();
+				found = collectNodeStates( childNodeState, filter, results );
+				if ( found && maxResultCount > 0 && maxResultCount >= results.size() ) return true;
+			}
+		}
+
+		return found;
+	}
+
+
+	public boolean containsUserObject( Object o ) {
+		UserObjectTreeNodeStateFilter filter = new UserObjectTreeNodeStateFilter( o );
+		filter.setMaxResultCount( 1 );
+		List<TreeNodeState> results = findNodeStates( filter );
+
+		return ( !results.isEmpty() );
+	}
+
+
+
+	public static interface TreeNodeStateFilter {
+		public int getMaxResultCount();
+		public boolean accept( TreeNodeState nodeState );
+	}
+
+
+
+	public static class UserObjectTreeNodeStateFilter implements TreeNodeStateFilter {
+
+		private Class objectClass = null;
+		private Object o = null;
+		private int maxResultCount = 0;
+
+
+		/**
+		 * Constructs a filter matching objects of a given class (or subclass).
+		 */
+		public UserObjectTreeNodeStateFilter( Class objectClass ) {
+			this.objectClass = objectClass;
+		}
+
+		/**
+		 * Constructs a filter matching objects equal to a given object.
+		 */
+		public UserObjectTreeNodeStateFilter( Object o ) {
+			this.o = o;
+		}
+
+
+		public void setMaxResultCount( int n ) { maxResultCount = n; }
+
+		@Override
+		public int getMaxResultCount() { return maxResultCount; }
+
+		@Override
+		public boolean accept( TreeNodeState nodeState ) {
+			Object nodeObject = nodeState.getUserObject();
+			if ( objectClass != null && nodeObject != null ) {
+				@SuppressWarnings("unchecked")
+				boolean result = objectClass.isAssignableFrom( nodeObject.getClass() );
+				return result;
+			}
+			else if ( o != null ) {
+				return ( o.equals( nodeState.getUserObject() ) );
+			}
+			return false;
+		}
+	}
+
+
+	public static class TreeNodeState {
+
+		protected Object userObject = null;
+		protected boolean expand = false;
+		protected List<TreeNodeState> children = null;
+		private TreeNodeState parentNodeState = null;
+
+
+		public TreeNodeState() {
+			this( false, false );
+		}
+
+		public TreeNodeState( boolean allowsChildren, boolean expand ) {
+			if ( allowsChildren ) {
+				this.expand = expand;
+				children = new ArrayList<TreeNodeState>();
+			}
+		}
+
+
+		/**
+		 * Sets this node's parent to newParent but does not change the
+		 * parent's child array.
+		 */
+		public void setParent( TreeNodeState nodeState ) {
+			parentNodeState = nodeState;
+		}
+
+		public TreeNodeState getParent() {
+			return parentNodeState;
+		}
+
+
+		public boolean getAllowsChildren() {
+			return ( children != null );
+		}
+
+		public void addChild( TreeNodeState childNodeState ) {
+			TreeNodeState oldParent = childNodeState.getParent();
+			if ( oldParent != null ) oldParent.removeChild( childNodeState );
+
+			childNodeState.setParent( this );
+			children.add( childNodeState );
+		}
+
+		public void removeChild( TreeNodeState childNodeState ) {
+			children.remove( childNodeState );
+			childNodeState.setParent( null );
+		}
+
+		/**
+		 * Returns an iterator over this node state's children.
+		 */
+		public Iterator<TreeNodeState> children() {
+			return children.iterator();
+		}
+
+
+		public void setUserObject( Object userObject ) {
+			this.userObject = userObject;
+		}
+
+		public Object getUserObject() {
+			return userObject;
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/TreeTransferHandler.java

@@ -0,0 +1,268 @@
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.Cursor;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.dnd.DragSource;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import javax.swing.JComponent;
+import javax.swing.JTable;
+import javax.swing.JTree;
+import javax.swing.TransferHandler;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.MutableTreeNode;
+import javax.swing.tree.TreeNode;
+import javax.swing.tree.TreePath;
+
+
+/**
+ * A handler to enable drag-and-drop within a JTree.
+ *
+ * When dropped, copies of highlighted nodes will be made via clone() and
+ * inserted at the drop location, then the originals will be removed.
+ *
+ * Dragging onto a space between nodes will insert at that location.
+ * Dragging onto a node that allows children will insert into it.
+ * Dragging onto a node that doesn't allow children will insert after it.
+ *
+ * The TreeModel must be DefaultTreeModel (or a subclass).
+ * All nodes must be DefaultMutableTreeNode (or a subclass) and properly
+ * implement Cloneable.
+ * Set the Jtree's DropMode to ON_OR_INSERT.
+ * The root node must be hidden, to prevent it from being dragged.
+ * The tree's selection model may be set to single or multiple.
+ */
+public class TreeTransferHandler extends TransferHandler {
+
+	private DataFlavor localTreePathFlavor = null;
+	private JTree tree = null;
+
+
+	public TreeTransferHandler( JTree tree ) {
+		super();
+		this.tree = tree;
+
+		try {
+			localTreePathFlavor = new DataFlavor( DataFlavor.javaJVMLocalObjectMimeType + ";class=\""+ TreePath[].class.getName() +"\"" );
+		}
+		catch ( ClassNotFoundException e ) {
+			//log.error( e );
+		}
+	}
+
+	@Override
+	protected Transferable createTransferable( JComponent c ) {
+		assert ( c == tree );
+		TreePath[] highlightedPaths = tree.getSelectionPaths();
+
+		Map<Integer,List<TreePath>> pathsByLengthMap = new TreeMap<Integer,List<TreePath>>();
+		for ( TreePath path : highlightedPaths ) {
+			if ( path.getPath().length == 1 ) continue;  // Omit root node (shouldn't drag it anyway).
+
+			Integer pathLength = new Integer( path.getPath().length );
+			if ( !pathsByLengthMap.containsKey( pathLength ) ) {
+				pathsByLengthMap.put( pathLength, new ArrayList<TreePath>() );
+			}
+			pathsByLengthMap.get( pathLength ).add( path );
+		}
+		// For each length (shortest-first), iterate its paths.
+		// For each of those paths, search longer lengths' lists,
+		// removing any paths that are descendants of those short ancestor nodes.
+		List<Integer> lengthsList = new ArrayList<Integer>( pathsByLengthMap.keySet() );
+		for ( int i=0; i < lengthsList.size(); i++ ) {
+			for ( TreePath ancestorPath : pathsByLengthMap.get( lengthsList.get( i ) ) ) {
+				for ( int j=i+1; j < lengthsList.size(); j++ ) {
+
+					List<TreePath> childPaths = pathsByLengthMap.get( lengthsList.get( j ) );
+					for ( Iterator<TreePath> childIt = childPaths.iterator(); childIt.hasNext(); ) {
+						TreePath childPath = childIt.next();
+						if ( ancestorPath.isDescendant( childPath ) ) {
+							childIt.remove();
+						}
+					}
+
+				}
+			}
+		}
+		List<TreePath> uniquePathList = new ArrayList<TreePath>();
+		for ( List<TreePath> paths : pathsByLengthMap.values() ) {
+			uniquePathList.addAll( paths );
+		}
+		TreePath[] uniquePathsArray = uniquePathList.toArray( new TreePath[uniquePathList.size()] );
+
+		return new TreePathTransferrable( uniquePathsArray );
+	}
+
+	@Override
+	public boolean canImport( TransferHandler.TransferSupport ts ) {
+		boolean b = ( ts.getComponent() == tree && ts.isDrop() && ts.isDataFlavorSupported( localTreePathFlavor ) );
+		tree.setCursor( b ? DragSource.DefaultMoveDrop : DragSource.DefaultMoveNoDrop );
+		return b;
+	}
+
+	@Override
+	public int getSourceActions( JComponent comp ) {
+		return TransferHandler.MOVE;
+	}
+
+	@Override
+	@SuppressWarnings("Unchecked")
+	public boolean importData( TransferHandler.TransferSupport ts ) {
+		if ( !canImport(ts) ) return false;
+
+		JTree dstTree = (JTree)ts.getComponent();
+		DefaultTreeModel dstTreeModel = (DefaultTreeModel)dstTree.getModel();
+		JTree.DropLocation dl = (JTree.DropLocation)ts.getDropLocation();
+		TreePath dropPath = dl.getPath();    // Dest parent node, or null.
+		int dropIndex = dl.getChildIndex();  // Insertion child index in the dest parent node,
+		                                     // or -1 if dropped onto a group.
+
+		dstTree.setCursor( Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR) );
+		if ( dropPath == null ) return false;
+		MutableTreeNode dropParentNode = (MutableTreeNode)dropPath.getLastPathComponent();
+
+		// When dropping onto a non-group node, insert into the position after it instead.
+		if ( !dropParentNode.getAllowsChildren() ) {
+			MutableTreeNode prevParentNode = dropParentNode;
+			dropPath = dropPath.getParentPath();
+			dropParentNode = (MutableTreeNode)dropPath.getLastPathComponent();
+			dropIndex = dropParentNode.getIndex( prevParentNode ) + 1;
+		}
+
+		try {
+			TreePath[] draggedPaths = (TreePath[])ts.getTransferable().getTransferData( localTreePathFlavor );
+
+			// Bail if the dropPath was among those dragged.
+			boolean badDrop = false;
+			for ( TreePath path : draggedPaths ) {
+				if ( path.equals( dropPath ) ) {
+					badDrop = true;
+					break;
+				}
+			}
+
+			if ( !badDrop && dropParentNode.getAllowsChildren() ) {
+				for ( TreePath path : draggedPaths ) {
+					// Copy the dragged node and any children.
+					DefaultMutableTreeNode srcNode = (DefaultMutableTreeNode)path.getLastPathComponent();
+					MutableTreeNode newNode = (MutableTreeNode)cloneNodes( srcNode );
+
+					if ( dropIndex != -1 ) {
+						// Insert.
+						dropParentNode.insert( newNode, dropIndex );
+						dstTreeModel.nodesWereInserted( dropParentNode, new int[]{dropIndex} );
+						dropIndex++;  // Next insertion will be after this node.
+					}
+					else {
+						// Add to the end.
+						int addIndex = dropParentNode.getChildCount();
+						dropParentNode.insert( newNode, addIndex );
+						dstTreeModel.nodesWereInserted( dropParentNode, new int[]{addIndex} );
+						if ( !dstTree.isExpanded( dropPath ) ) dstTree.expandPath( dropPath );
+					}
+				}
+				return true;
+			}
+		}
+		catch ( Exception e ) {
+			// UnsupportedFlavorException: if Transferable.getTransferData() fails.
+			// IOException: if Transferable.getTransferData() fails.
+			// IllegalStateException: if insert/add fails because dropPath's node doesn't allow children.
+			//log.error( e );
+		}
+		return false;
+	}
+
+	@Override
+	protected void exportDone( JComponent source, Transferable data, int action ) {
+		if ( action == TransferHandler.MOVE || action == TransferHandler.NONE ) {
+			tree.setCursor( Cursor.getPredefinedCursor( Cursor.DEFAULT_CURSOR ) );
+		}
+
+		JTree srcTree = (JTree)source;
+		DefaultTreeModel srcTreeModel = (DefaultTreeModel)srcTree.getModel();
+
+		if ( action == TransferHandler.MOVE ) {
+			// Remove original dragged rows now that the move completed.
+
+			try {
+				TreePath[] draggedPaths = (TreePath[])data.getTransferData( localTreePathFlavor );
+				for ( TreePath path : draggedPaths ) {
+					MutableTreeNode doomedNode = (MutableTreeNode)path.getLastPathComponent();
+					TreeNode parentNode = doomedNode.getParent();
+					int doomedIndex = parentNode.getIndex( doomedNode );
+					doomedNode.removeFromParent();
+					srcTreeModel.nodesWereRemoved( parentNode, new int[]{doomedIndex}, new Object[]{doomedNode} );
+				}
+			}
+			catch ( Exception e ) {
+				//log.error( e );
+			}
+		}
+	}
+
+
+	/**
+	 * Recursively clones a node and its descendants.
+	 *
+	 * The clone() methods will generally do a shallow copy, sharing
+	 * userObjects.
+	 *
+	 * Sidenote: The parameter couldn't just be MutableTreeNode, because that
+	 * doesn't offer the clone() method. And blindly using reflection to
+	 * invoke it wouldn't be pretty. Conceivably, a settable factory could be
+	 * designed to copy specific custom classes (using constructors instead
+	 * of clone(). But that'd be overkill.
+	 */
+	@SuppressWarnings("Unchecked")
+	protected MutableTreeNode cloneNodes( DefaultMutableTreeNode srcNode ) {
+		MutableTreeNode resultNode = (MutableTreeNode)srcNode.clone();
+
+		Enumeration enumer = srcNode.children();
+		while ( enumer.hasMoreElements() ) {
+			DefaultMutableTreeNode childNode = (DefaultMutableTreeNode)enumer.nextElement();
+			int addIndex = resultNode.getChildCount();
+			resultNode.insert( cloneNodes( (DefaultMutableTreeNode)childNode ), addIndex );
+		}
+
+		return resultNode;
+	}
+
+
+	/**
+	 * Drag and drop TreePath data, constructed with a raw object
+	 * from a drag source, to be transformed into a flavor
+	 * suitable for the drop target.
+	 */
+	private class TreePathTransferrable implements Transferable {
+		private TreePath[] data;
+
+		public TreePathTransferrable( TreePath[] data ) {
+			this.data = data;
+		}
+
+		@Override
+		public Object getTransferData( DataFlavor flavor ) {
+			if ( flavor.equals( localTreePathFlavor ) ) {
+				return data;
+			}
+			return null;
+		}
+
+		@Override
+		public DataFlavor[] getTransferDataFlavors() {
+			return new DataFlavor[] {localTreePathFlavor};
+		}
+
+		@Override
+		public boolean isDataFlavorSupported( DataFlavor flavor ) {
+			return flavor.equals( localTreePathFlavor );
+		}
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/TristateButtonModel.java

@@ -0,0 +1,105 @@
+/**
+ * Copied from "TristateCheckBox Revisited" (2007-05-25)
+ * By Dr. Heinz M. Kabutz
+ * http://www.javaspecialists.co.za/archive/Issue145.html
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.event.ItemEvent;
+import javax.swing.JToggleButton.ToggleButtonModel;
+
+
+public class TristateButtonModel extends ToggleButtonModel {
+
+  private TristateState state = TristateState.DESELECTED;
+
+
+	public TristateButtonModel( TristateState state ) {
+		setState( state );
+	}
+
+	public TristateButtonModel() {
+		this( TristateState.DESELECTED );
+	}
+
+
+	public void setIndeterminate() {
+		setState( TristateState.INDETERMINATE );
+	}
+
+	public boolean isIndeterminate() {
+		return ( state == TristateState.INDETERMINATE );
+	}
+
+
+	@Override
+	public void setEnabled( boolean enabled ) {
+		super.setEnabled(enabled);
+		// Restore state display.
+		displayState();
+	}
+
+	@Override
+	public void setSelected( boolean selected ) {
+		setState( selected ? TristateState.SELECTED : TristateState.DESELECTED );
+	}
+
+	@Override
+	public void setArmed( boolean b ) {
+	}
+
+	@Override
+	public void setPressed( boolean b ) {
+	}
+
+
+	public void iterateState() {
+		setState( state.next() );
+	}
+
+	public void setState( TristateState state ) {
+		this.state = state;
+		displayState();
+		if ( state == TristateState.INDETERMINATE && isEnabled() ) {
+			// Send ChangeEvent.
+			fireStateChanged();
+
+			// Send ItemEvent.
+			int indeterminate = 3;
+			fireItemStateChanged(new ItemEvent( this, ItemEvent.ITEM_STATE_CHANGED, this, indeterminate ));
+		}
+	}
+
+	private void displayState() {
+		super.setSelected( state != TristateState.DESELECTED );
+		super.setArmed( state == TristateState.INDETERMINATE );
+		super.setPressed( state == TristateState.INDETERMINATE );
+	}
+
+	public TristateState getState() {
+		return state;
+	}
+
+
+
+	public static enum TristateState {
+		SELECTED {
+			public TristateState next() {
+				return INDETERMINATE;
+			}
+		},
+		INDETERMINATE {
+			public TristateState next() {
+				return DESELECTED;
+			}
+		},
+		DESELECTED {
+			public TristateState next() {
+				return SELECTED;
+			}
+		};
+
+		public abstract TristateState next();
+	}
+}

src/main/java/net/vhati/modmanager/ui/tree/TristateCheckBox.java

@@ -0,0 +1,142 @@
+/*
+ * Based on "TristateCheckBox Revisited" (2007-05-25)
+ * By Dr. Heinz M. Kabutz
+ * http://www.javaspecialists.co.za/archive/Issue145.html
+ */
+
+package net.vhati.modmanager.ui.tree;
+
+import java.awt.AWTEvent;
+import java.awt.EventQueue;
+import java.awt.event.ActionEvent;
+import java.awt.event.InputEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import javax.swing.AbstractAction;
+import javax.swing.ActionMap;
+import javax.swing.ButtonModel;
+import javax.swing.Icon;
+import javax.swing.JCheckBox;
+import javax.swing.SwingUtilities;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import javax.swing.plaf.ActionMapUIResource;
+
+import net.vhati.modmanager.ui.tree.TristateButtonModel;
+import net.vhati.modmanager.ui.tree.TristateButtonModel.TristateState;
+
+
+public class TristateCheckBox extends JCheckBox {
+
+	private final ChangeListener enableListener;
+
+
+	public TristateCheckBox( String text, Icon icon, TristateState initial ) {
+		super( text, icon );
+
+		setModel( new TristateButtonModel( initial ) );
+
+		enableListener = new ChangeListener() {
+			@Override
+			public void stateChanged( ChangeEvent e ) {
+				TristateCheckBox.this.setFocusable( TristateCheckBox.this.getModel().isEnabled() );
+			}
+		};
+
+		// Add a listener for when the mouse is pressed.
+		super.addMouseListener(new MouseAdapter() {
+			@Override
+			public void mousePressed( MouseEvent e ) {
+				TristateCheckBox.this.iterateState();
+			}
+		});
+
+		// Reset the keyboard action map.
+		ActionMap map = new ActionMapUIResource();
+		map.put( "pressed", new AbstractAction() {
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				TristateCheckBox.this.iterateState();
+			}
+		});
+		map.put( "released", null );
+		SwingUtilities.replaceUIActionMap( this, map );
+	}
+
+	public TristateCheckBox( String text, TristateState initial ) {
+		this( text, null, initial );
+	}
+
+	public TristateCheckBox( String text ) {
+		this( text, null );
+	}
+
+	public TristateCheckBox() {
+		this( null );
+	}
+
+
+	public void setIndeterminate() {
+		getTristateModel().setIndeterminate();
+	}
+
+	public boolean isIndeterminate() {
+		return getTristateModel().isIndeterminate();
+	}
+
+
+	public void setState( TristateState state ) {
+		getTristateModel().setState( state );
+	}
+
+	public TristateState getState() {
+		return getTristateModel().getState();
+	}
+
+
+	@Override
+	public void setModel( ButtonModel newModel ) {
+		super.setModel( newModel );
+
+		// Listen for enable changes.
+		if ( model instanceof TristateButtonModel ) {
+			model.addChangeListener( enableListener );
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	public TristateButtonModel getTristateModel() {
+		return (TristateButtonModel)super.getModel();
+	}
+
+
+	/**
+	 * No one may add mouse listeners, not even Swing!
+	 */
+	@Override
+	public void addMouseListener( MouseListener l ) {
+	}
+
+
+  private void iterateState() {
+		// Maybe do nothing at all?
+		if ( !super.getModel().isEnabled() ) return;
+
+		this.grabFocus();
+
+		// Iterate state.
+		getTristateModel().iterateState();
+
+		// Fire ActionEvent.
+		int modifiers = 0;
+		AWTEvent currentEvent = EventQueue.getCurrentEvent();
+		if ( currentEvent instanceof InputEvent ) {
+			modifiers = ((InputEvent)currentEvent).getModifiers();
+		}
+		else if ( currentEvent instanceof ActionEvent ) {
+			modifiers = ((ActionEvent)currentEvent).getModifiers();
+		}
+		fireActionPerformed(new ActionEvent( this, ActionEvent.ACTION_PERFORMED, this.getText(), System.currentTimeMillis(), modifiers ));
+	}
+}