Refactoring of subsystems and eventbus

.gitignore

@@ -1,2 +1,3 @@
 /bin/
-/target/
+/target/
+*.log

README.md

@@ -1,5 +1,5 @@
-Dungeon crawler RPG
-===================
+Rogue - dungeon crawler
+=======================
 
 Goals
 -----
@@ -11,10 +11,19 @@ Goals
 Features
 --------
 
-- Randomly generated floors
-- Hybrid turn-based gameplay
+- Full OOP design
+- Event driven
+- OpenGL 2D rendering
+
+- Random floors
+- Real-time gameplay
+- Monsters with AI (-> combat system)
+
+
+Possibly added
+--------------
+
 - Stats and leveling
-- Monsters
 - Collectable items
 - Potions, food
 - Simple inventory system
@@ -24,5 +33,4 @@ Used libraries
 --------------
 
 - Slick2D
-- NiftyGUI
 - LWJGL

src/mightypork/rogue/App.java

@@ -7,10 +7,10 @@ import java.nio.channels.FileLock;
 
 import javax.swing.JOptionPane;
 
+import mightypork.rogue.bus.events.UpdateEvent;
 import mightypork.rogue.display.DisplaySystem;
 import mightypork.rogue.display.Screen;
 import mightypork.rogue.display.ScreenTestAnimations;
-import mightypork.rogue.display.events.UpdateEvent;
 import mightypork.rogue.input.InputSystem;
 import mightypork.rogue.input.KeyStroke;
 import mightypork.rogue.sounds.SoundSystem;
@@ -25,6 +25,11 @@ import mightypork.utils.time.TimerDelta;
 import org.lwjgl.input.Keyboard;
 
 
+/**
+ * Main class
+ * 
+ * @author MightyPork
+ */
 public class App implements Destroyable, AppAccess {
 
 	/** instance pointer */
@@ -61,7 +66,7 @@ public class App implements Destroyable, AppAccess {
 
 
 	/**
-	 * Show crash report dialog with error stack trace.
+	 * Handle a crash
 	 * 
 	 * @param error
 	 */
@@ -69,15 +74,12 @@ public class App implements Destroyable, AppAccess {
 	{
 		Log.e("The game has crashed.", error);
 
-		if (inst != null) inst.exit();
+		if (inst != null) inst.shutdown();
 	}
 
 
-	/**
-	 * Quit to OS<br>
-	 * Destroy app & exit VM
-	 */
-	public void exit()
+	@Override
+	public void shutdown()
 	{
 		destroy();
 		System.exit(0);
@@ -121,7 +123,7 @@ public class App implements Destroyable, AppAccess {
 			);
 			//@formatter:on
 
-			exit();
+			shutdown();
 			return;
 		}
 	}
@@ -165,7 +167,7 @@ public class App implements Destroyable, AppAccess {
 	private void initBus()
 	{
 		events = new MessageBus();
-		events.addSubscriber(this);
+		events.subscribe(this);
 
 		events.createChannel(UpdateEvent.class, UpdateEvent.Listener.class);
 	}
@@ -214,7 +216,7 @@ public class App implements Destroyable, AppAccess {
 			public void run()
 			{
 				Log.f3("CTRL+Q, shutting down.");
-				exit();
+				shutdown();
 			}
 		});
 	}
@@ -246,7 +248,7 @@ public class App implements Destroyable, AppAccess {
 	{
 		initialize();
 		mainLoop();
-		exit();
+		shutdown();
 	}
 
 	/** timer */
@@ -293,7 +295,7 @@ public class App implements Destroyable, AppAccess {
 	 * @return sound system of the running instance
 	 */
 	@Override
-	public SoundSystem soundsys()
+	public SoundSystem snd()
 	{
 		return sounds;
 	}
@@ -323,7 +325,7 @@ public class App implements Destroyable, AppAccess {
 	 * @return event bus
 	 */
 	@Override
-	public MessageBus msgbus()
+	public MessageBus bus()
 	{
 		return events;
 	}

src/mightypork/rogue/AppAccess.java

@@ -17,7 +17,7 @@ public interface AppAccess {
 	/**
 	 * @return sound system
 	 */
-	abstract SoundSystem soundsys();
+	abstract SoundSystem snd();
 
 
 	/**
@@ -35,6 +35,13 @@ public interface AppAccess {
 	/**
 	 * @return event bus
 	 */
-	abstract MessageBus msgbus();
+	abstract MessageBus bus();
+
+
+	/**
+	 * Quit to OS<br>
+	 * Destroy app & exit VM
+	 */
+	abstract void shutdown();
 
 }

src/mightypork/rogue/AppAdapter.java

@@ -0,0 +1,61 @@
+package mightypork.rogue;
+
+
+import mightypork.rogue.display.DisplaySystem;
+import mightypork.rogue.input.InputSystem;
+import mightypork.rogue.sounds.SoundSystem;
+import mightypork.utils.patterns.subscription.MessageBus;
+
+
+/**
+ * App access adapter
+ * 
+ * @author MightyPork
+ */
+public class AppAdapter implements AppAccess {
+
+	private AppAccess app;
+
+
+	public AppAdapter(AppAccess app) {
+		if (app == null) throw new NullPointerException("AppAccess instance cannot be null.");
+
+		this.app = app;
+	}
+
+
+	@Override
+	public final SoundSystem snd()
+	{
+		return app.snd();
+	}
+
+
+	@Override
+	public final InputSystem input()
+	{
+		return app.input();
+	}
+
+
+	@Override
+	public final DisplaySystem disp()
+	{
+		return app.disp();
+	}
+
+
+	@Override
+	public final MessageBus bus()
+	{
+		return app.bus();
+	}
+
+
+	@Override
+	public void shutdown()
+	{
+		app.shutdown();
+	}
+
+}

src/mightypork/rogue/AppSubsystem.java

@@ -1,209 +0,0 @@
-package mightypork.rogue;
-
-
-import java.util.HashSet;
-import java.util.Set;
-
-import mightypork.rogue.display.DisplaySystem;
-import mightypork.rogue.display.events.UpdateEvent;
-import mightypork.rogue.input.InputSystem;
-import mightypork.rogue.sounds.SoundSystem;
-import mightypork.utils.logging.Log;
-import mightypork.utils.patterns.Destroyable;
-import mightypork.utils.patterns.subscription.MessageBus;
-import mightypork.utils.time.Updateable;
-
-
-public abstract class AppSubsystem implements AppAccess, UpdateEvent.Listener, Updateable, Destroyable {
-
-	private AppAccess app;
-	private boolean wantUpdates;
-	private boolean destroyed = false;
-
-	/** Subsystem children subscribing to MessageBus */
-	private Set<Object> childSubscribers = new HashSet<Object>();
-
-
-	/**
-	 * Create a subsystem
-	 * 
-	 * @param app app instance access
-	 * @param joinBus whether to initially join msgbus
-	 */
-	public AppSubsystem(AppAccess app, boolean joinBus) {
-		this.app = app;
-
-		// add to subscriber group
-		childSubscribers.add(this);
-
-		enableEvents(joinBus);
-
-		enableUpdates(true);
-
-		init();
-	}
-
-
-	/**
-	 * Set whether events should be received.<br>
-	 * This includes {@link UpdateEvent}, so disabling events also disables
-	 * updates.
-	 * 
-	 * @param enable
-	 */
-	protected final void enableEvents(boolean enable)
-	{
-		assertLive();
-
-		// this & child subscribers
-		for (Object o : childSubscribers) {
-			if (enable) {
-				app.msgbus().addSubscriber(o);
-			} else {
-				app.msgbus().removeSubscriber(o);
-			}
-		}
-	}
-
-
-	/**
-	 * Set whether to receive {@link UpdateEvent}s (delta timing, one each
-	 * frame).<br>
-	 * 
-	 * @param enable
-	 */
-	protected final void enableUpdates(boolean enable)
-	{
-		assertLive();
-
-		wantUpdates = enable;
-	}
-
-
-	@Override
-	public final void receive(UpdateEvent event)
-	{
-		assertLive();
-
-		if (wantUpdates) update(event.getDeltaTime());
-	}
-
-
-//	/**
-//	 * @return app instance
-//	 */
-//	protected AppAccess app()
-//	{
-//		assertLive();
-//
-//		return app;
-//	}
-
-	@Override
-	public void update(double delta)
-	{
-		Log.w("Subsystem " + getClass().getSimpleName() + " receives updates, but does not override the update() method.");
-	}
-
-
-	/**
-	 * Initialize the subsystem<br>
-	 * (called during construction)
-	 */
-	protected abstract void init();
-
-
-	/**
-	 * Deinitialize the subsystem<br>
-	 * (called during destruction)<br>
-	 * <br>
-	 * All child eventbus subscribers will be removed from the eventbus.
-	 */
-	protected abstract void deinit();
-
-
-	/**
-	 * Add a child subscriber to the {@link MessageBus}.<br>
-	 * Child subscribers are removed when subsystem is destroyed, and can be
-	 * connected/disconnected using the <code>enableEvents()</code> method.
-	 * 
-	 * @param client
-	 * @return true on success
-	 */
-	public final boolean addChildSubscriber(Object client)
-	{
-		assertLive();
-
-		if (client == null) return false;
-
-		msgbus().addSubscriber(client);
-		childSubscribers.add(client);
-
-		return true;
-	}
-
-
-	public final void removeChildSubscriber(Object client)
-	{
-		assertLive();
-
-		childSubscribers.remove(client);
-		msgbus().removeSubscriber(client);
-	}
-
-
-	@Override
-	public final void destroy()
-	{
-		assertLive();
-
-		deinit();
-
-		enableEvents(false); // remove all subscribers from bus
-		app = null;
-
-		destroyed = true;
-	}
-
-
-	@Override
-	public MessageBus msgbus()
-	{
-		assertLive();
-
-		return app.msgbus();
-	}
-
-
-	@Override
-	public SoundSystem soundsys()
-	{
-		assertLive();
-
-		return app.soundsys();
-	}
-
-
-	@Override
-	public InputSystem input()
-	{
-		assertLive();
-
-		return app.input();
-	}
-
-
-	@Override
-	public DisplaySystem disp()
-	{
-		assertLive();
-
-		return app.disp();
-	}
-
-
-	private void assertLive()
-	{
-		if (destroyed) throw new IllegalStateException("Subsystem already destroyed.");
-	}
-}

src/mightypork/rogue/bus/DelegatingBusClient.java

@@ -0,0 +1,162 @@
+package mightypork.rogue.bus;
+
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import mightypork.rogue.AppAccess;
+import mightypork.rogue.AppAdapter;
+import mightypork.rogue.bus.events.UpdateEvent;
+import mightypork.utils.logging.Log;
+import mightypork.utils.patterns.Destroyable;
+import mightypork.utils.patterns.subscription.MessageBus;
+import mightypork.utils.patterns.subscription.clients.DelegatingClient;
+import mightypork.utils.patterns.subscription.clients.ToggleableClient;
+import mightypork.utils.time.Updateable;
+
+
+/**
+ * App event bus client, to be used for subsystems, screens and anything that
+ * needs access to the eventbus
+ * 
+ * @author MightyPork
+ */
+public abstract class DelegatingBusClient extends AppAdapter implements DelegatingClient, ToggleableClient, Destroyable, Updateable, UpdateEvent.Listener {
+
+	/** Subsystem children subscribing to MessageBus */
+	private Set<Object> childSubscribers = new HashSet<Object>();
+
+	private boolean wantUpdates = true;
+	private boolean eventsEnabled = true;
+
+
+	public DelegatingBusClient(AppAccess app, boolean updates) {
+		super(app);
+
+		bus().subscribe(this);
+
+		enableUpdates(updates);
+
+		init();
+	}
+
+
+	/**
+	 * Add a child subscriber to the {@link MessageBus}.<br>
+	 * 
+	 * @param client
+	 * @return true on success
+	 */
+	public final boolean addChildSubscriber(Object client)
+	{
+		if (client == null) return false;
+
+		childSubscribers.add(client);
+
+		return true;
+	}
+
+
+	/**
+	 * Remove a child subscriber
+	 * 
+	 * @param client subscriber to remove
+	 */
+	public final void removeChildSubscriber(Object client)
+	{
+		if (client == null) return;
+
+		childSubscribers.remove(client);
+	}
+
+
+	@Override
+	public final Collection<Object> getChildClients()
+	{
+		return childSubscribers;
+	}
+
+
+	@Override
+	public final boolean doesDelegate()
+	{
+		return doesSubscribe();
+	}
+
+
+	/**
+	 * Set whether to receive {@link UpdateEvent}s (delta timing, one each
+	 * frame).<br>
+	 * 
+	 * @param enable
+	 */
+	public final void enableUpdates(boolean enable)
+	{
+		wantUpdates = enable;
+	}
+
+
+	@Override
+	public final boolean doesSubscribe()
+	{
+		return eventsEnabled;
+	}
+
+
+	/**
+	 * Set whether events should be received.
+	 * 
+	 * @param enable
+	 */
+	public final void enableEvents(boolean enable)
+	{
+		this.eventsEnabled = enable;
+	}
+
+
+	@Override
+	public final void receive(UpdateEvent event)
+	{
+		if (wantUpdates) update(event.getDeltaTime());
+	}
+
+
+	@Override
+	public final void destroy()
+	{
+		deinit();
+
+		enableUpdates(false);
+
+		bus().unsubscribe(this);
+	}
+
+
+	@Override
+	public void update(double delta)
+	{
+		Log.w("Client " + getClass().getSimpleName() + " receives updates, but does not override the update() method.");
+	}
+
+
+	/**
+	 * Initialize the subsystem<br>
+	 * (called during construction)
+	 */
+	protected void init()
+	{
+		// no impl
+	}
+
+
+	/**
+	 * Deinitialize the subsystem<br>
+	 * (called during destruction)
+	 */
+	protected void deinit()
+	{
+		// no impl
+	}
+
+}

src/mightypork/rogue/bus/SimpleBusClient.java

@@ -0,0 +1,23 @@
+package mightypork.rogue.bus;
+
+
+import mightypork.rogue.AppAccess;
+import mightypork.rogue.AppAdapter;
+
+
+/**
+ * Simplest event bus client with app access
+ * 
+ * @author MightyPork
+ */
+public class SimpleBusClient extends AppAdapter {
+
+	/**
+	 * @param app app access
+	 */
+	public SimpleBusClient(AppAccess app) {
+		super(app);
+
+		bus().subscribe(this);
+	}
+}

src/mightypork/rogue/bus/UpdateReceiver.java

@@ -0,0 +1,26 @@
+package mightypork.rogue.bus;
+
+
+import mightypork.rogue.AppAccess;
+import mightypork.rogue.bus.events.UpdateEvent;
+import mightypork.utils.time.Updateable;
+
+
+public abstract class UpdateReceiver extends SimpleBusClient implements UpdateEvent.Listener, Updateable {
+
+	public UpdateReceiver(AppAccess app) {
+		super(app);
+	}
+
+
+	@Override
+	public void receive(UpdateEvent event)
+	{
+		update(event.getDeltaTime());
+	}
+
+
+	@Override
+	public abstract void update(double delta);
+
+}

src/mightypork/rogue/bus/events/KeyboardEvent.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.input.events;
+package mightypork.rogue.bus.events;
 
 
 import mightypork.utils.patterns.subscription.Handleable;

src/mightypork/rogue/bus/events/MouseButtonEvent.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.input.events;
+package mightypork.rogue.bus.events;
 
 
 import mightypork.utils.math.coord.Coord;

src/mightypork/rogue/bus/events/MouseMotionEvent.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.input.events;
+package mightypork.rogue.bus.events;
 
 
 import mightypork.utils.math.coord.Coord;

src/mightypork/rogue/bus/events/ScreenChangeEvent.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.display.events;
+package mightypork.rogue.bus.events;
 
 
 import mightypork.utils.math.coord.Coord;

src/mightypork/rogue/bus/events/UpdateEvent.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.display.events;
+package mightypork.rogue.bus.events;
 
 
 import mightypork.utils.patterns.subscription.Handleable;

src/mightypork/rogue/display/DisplaySystem.java

@@ -7,9 +7,9 @@ import java.awt.image.BufferedImage;
 import java.nio.ByteBuffer;
 
 import mightypork.rogue.AppAccess;
-import mightypork.rogue.AppSubsystem;
-import mightypork.rogue.display.constraints.ConstraintContext;
-import mightypork.rogue.display.events.ScreenChangeEvent;
+import mightypork.rogue.bus.DelegatingBusClient;
+import mightypork.rogue.bus.events.ScreenChangeEvent;
+import mightypork.rogue.display.constraints.Bounding;
 import mightypork.utils.logging.Log;
 import mightypork.utils.math.coord.Coord;
 import mightypork.utils.math.coord.Rect;
@@ -20,7 +20,7 @@ import org.lwjgl.opengl.Display;
 import org.lwjgl.opengl.DisplayMode;
 
 
-public class DisplaySystem extends AppSubsystem implements ConstraintContext {
+public class DisplaySystem extends DelegatingBusClient implements Bounding {
 
 	private DisplayMode windowDisplayMode;
 	private int targetFps;
@@ -51,7 +51,7 @@ public class DisplaySystem extends AppSubsystem implements ConstraintContext {
 	 */
 	private void initChannels()
 	{
-		msgbus().createChannel(ScreenChangeEvent.class, ScreenChangeEvent.Listener.class);
+		bus().createChannel(ScreenChangeEvent.class, ScreenChangeEvent.Listener.class);
 	}
 
 
@@ -101,7 +101,7 @@ public class DisplaySystem extends AppSubsystem implements ConstraintContext {
 				Display.update();
 			}
 
-			msgbus().broadcast(new ScreenChangeEvent(true, Display.isFullscreen(), getSize()));
+			bus().broadcast(new ScreenChangeEvent(true, Display.isFullscreen(), getSize()));
 
 		} catch (Throwable t) {
 			Log.e("Failed to toggle fullscreen mode.", t);
@@ -178,7 +178,7 @@ public class DisplaySystem extends AppSubsystem implements ConstraintContext {
 	public void beginFrame()
 	{
 		if (Display.wasResized()) {
-			msgbus().broadcast(new ScreenChangeEvent(false, Display.isFullscreen(), getSize()));
+			bus().broadcast(new ScreenChangeEvent(false, Display.isFullscreen(), getSize()));
 		}
 
 		glLoadIdentity();

src/mightypork/rogue/display/Screen.java

@@ -3,9 +3,9 @@ package mightypork.rogue.display;
 
 import static org.lwjgl.opengl.GL11.*;
 import mightypork.rogue.AppAccess;
-import mightypork.rogue.AppSubsystem;
-import mightypork.rogue.display.constraints.ConstraintContext;
-import mightypork.rogue.display.events.ScreenChangeEvent;
+import mightypork.rogue.bus.DelegatingBusClient;
+import mightypork.rogue.bus.events.ScreenChangeEvent;
+import mightypork.rogue.display.constraints.Bounding;
 import mightypork.rogue.input.KeyBinder;
 import mightypork.rogue.input.KeyBindingPool;
 import mightypork.rogue.input.KeyStroke;
@@ -20,7 +20,7 @@ import mightypork.utils.math.coord.Rect;
  * 
  * @author MightyPork
  */
-public abstract class Screen extends AppSubsystem implements KeyBinder, ConstraintContext, ScreenChangeEvent.Listener {
+public abstract class Screen extends DelegatingBusClient implements KeyBinder, Bounding, ScreenChangeEvent.Listener {
 
 	private KeyBindingPool keybindings;
 
@@ -28,7 +28,10 @@ public abstract class Screen extends AppSubsystem implements KeyBinder, Constrai
 
 
 	public Screen(AppAccess app) {
-		super(app, false);
+		super(app, true);
+
+		// disable events initially
+		enableEvents(false);
 	}
 
 

src/mightypork/rogue/display/ScreenTestAnimations.java

@@ -4,8 +4,8 @@ package mightypork.rogue.display;
 import java.util.Random;
 
 import mightypork.rogue.AppAccess;
+import mightypork.rogue.bus.events.MouseButtonEvent;
 import mightypork.rogue.input.KeyStroke;
-import mightypork.rogue.input.events.MouseButtonEvent;
 import mightypork.rogue.util.RenderUtils;
 import mightypork.utils.math.Polar;
 import mightypork.utils.math.color.RGB;

src/mightypork/rogue/display/constraints/Bounding.java

@@ -5,11 +5,11 @@ import mightypork.utils.math.coord.Rect;
 
 
 /**
- * Constraints can be based on this
+ * Bounding box provider - context for {@link Constraint}
  * 
  * @author MightyPork
  */
-public interface ConstraintContext {
+public interface Bounding {
 
 	/**
 	 * @return bounding rectangle

src/mightypork/rogue/display/constraints/Constraint.java

@@ -2,39 +2,58 @@ package mightypork.rogue.display.constraints;
 
 
 import mightypork.utils.math.coord.Coord;
+import mightypork.utils.math.coord.Rect;
 
 
-public abstract class Constraint implements ConstraintContext {
+public abstract class Constraint implements Bounding {
 
-	protected ConstraintContext context;
+	protected Bounding context;
 
 
-	public Constraint(ConstraintContext context) {
+	public Constraint(Bounding context) {
 		this.context = context;
 	}
 
 
-	public void setContext(ConstraintContext context)
+	/**
+	 * Assign a context
+	 * 
+	 * @param context
+	 */
+	public void setContext(Bounding context)
 	{
 		this.context = context;
 	}
 
 
-	public ConstraintContext getContext()
+	/**
+	 * @return context
+	 */
+	public Bounding getContext()
 	{
 		return context;
 	}
 
 
+	/**
+	 * @return context rect origin
+	 */
 	protected Coord origin()
 	{
 		return context.getRect().getOrigin();
 	}
 
 
+	/**
+	 * @return context rect size
+	 */
 	protected Coord size()
 	{
 		return context.getRect().getSize();
 	}
 
+
+	@Override
+	public abstract Rect getRect();
+
 }

src/mightypork/rogue/display/rendering/Renderable.java

@@ -0,0 +1,8 @@
+package mightypork.rogue.display.rendering;
+
+
+public interface Renderable {
+
+	public void render();
+
+}

src/mightypork/rogue/display/rendering/ScreenLayer.java

@@ -0,0 +1,18 @@
+package mightypork.rogue.display.rendering;
+
+
+import mightypork.rogue.AppAccess;
+import mightypork.rogue.bus.DelegatingBusClient;
+
+
+public abstract class ScreenLayer extends DelegatingBusClient implements Renderable {
+
+	public ScreenLayer(AppAccess app) {
+		super(app, true);
+	}
+
+
+	@Override
+	public abstract void render();
+
+}

src/mightypork/rogue/input/InputSystem.java

@@ -2,10 +2,10 @@ package mightypork.rogue.input;
 
 
 import mightypork.rogue.AppAccess;
-import mightypork.rogue.AppSubsystem;
-import mightypork.rogue.input.events.KeyboardEvent;
-import mightypork.rogue.input.events.MouseButtonEvent;
-import mightypork.rogue.input.events.MouseMotionEvent;
+import mightypork.rogue.bus.DelegatingBusClient;
+import mightypork.rogue.bus.events.KeyboardEvent;
+import mightypork.rogue.bus.events.MouseButtonEvent;
+import mightypork.rogue.bus.events.MouseMotionEvent;
 import mightypork.utils.math.coord.Coord;
 
 import org.lwjgl.LWJGLException;
@@ -14,7 +14,7 @@ import org.lwjgl.input.Mouse;
 import org.lwjgl.opengl.Display;
 
 
-public class InputSystem extends AppSubsystem implements KeyBinder {
+public class InputSystem extends DelegatingBusClient implements KeyBinder {
 
 	// listeners
 	private KeyBindingPool keybindings;
@@ -60,9 +60,9 @@ public class InputSystem extends AppSubsystem implements KeyBinder {
 
 	private void initChannels()
 	{
-		msgbus().createChannel(KeyboardEvent.class, KeyboardEvent.Listener.class);
-		msgbus().createChannel(MouseMotionEvent.class, MouseMotionEvent.Listener.class);
-		msgbus().createChannel(MouseButtonEvent.class, MouseButtonEvent.Listener.class);
+		bus().createChannel(KeyboardEvent.class, KeyboardEvent.Listener.class);
+		bus().createChannel(MouseMotionEvent.class, MouseMotionEvent.Listener.class);
+		bus().createChannel(MouseButtonEvent.class, MouseButtonEvent.Listener.class);
 	}
 
 
@@ -80,6 +80,21 @@ public class InputSystem extends AppSubsystem implements KeyBinder {
 	}
 
 
+	@Override
+	public void update(double delta)
+	{
+		Display.processMessages();
+
+		while (Mouse.next()) {
+			onMouseEvent();
+		}
+
+		while (Keyboard.next()) {
+			onKeyEvent();
+		}
+	}
+
+
 	private void onMouseEvent()
 	{
 		int button = Mouse.getEventButton();
@@ -88,8 +103,8 @@ public class InputSystem extends AppSubsystem implements KeyBinder {
 		Coord move = new Coord(Mouse.getEventDX(), Mouse.getEventDY());
 		int wheeld = Mouse.getEventDWheel();
 
-		if (button != -1 || wheeld != 0) msgbus().broadcast(new MouseButtonEvent(pos, button, down, wheeld));
-		if (!move.isZero()) msgbus().broadcast(new MouseMotionEvent(pos, move));
+		if (button != -1 || wheeld != 0) bus().broadcast(new MouseButtonEvent(pos, button, down, wheeld));
+		if (!move.isZero()) bus().broadcast(new MouseMotionEvent(pos, move));
 	}
 
 
@@ -98,21 +113,6 @@ public class InputSystem extends AppSubsystem implements KeyBinder {
 		int key = Keyboard.getEventKey();
 		boolean down = Keyboard.getEventKeyState();
 		char c = Keyboard.getEventCharacter();
-		msgbus().broadcast(new KeyboardEvent(key, c, down));
-	}
-
-
-	@Override
-	public void update(double delta)
-	{
-		Display.processMessages(); // redundant if Display.update() is called in main loop
-
-		while (Mouse.next()) {
-			onMouseEvent();
-		}
-
-		while (Keyboard.next()) {
-			onKeyEvent();
-		}
+		bus().broadcast(new KeyboardEvent(key, c, down));
 	}
 }

src/mightypork/rogue/input/KeyBinding.java

@@ -1,7 +1,7 @@
 package mightypork.rogue.input;
 
 
-import mightypork.rogue.input.events.KeyboardEvent;
+import mightypork.rogue.bus.events.KeyboardEvent;
 
 
 public class KeyBinding implements KeyboardEvent.Listener {

src/mightypork/rogue/input/KeyBindingPool.java

@@ -5,7 +5,7 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
 
-import mightypork.rogue.input.events.KeyboardEvent;
+import mightypork.rogue.bus.events.KeyboardEvent;
 import mightypork.utils.logging.Log;
 
 

src/mightypork/rogue/sounds/SoundSystem.java

@@ -8,7 +8,7 @@ import java.util.Map;
 import java.util.Set;
 
 import mightypork.rogue.AppAccess;
-import mightypork.rogue.AppSubsystem;
+import mightypork.rogue.bus.DelegatingBusClient;
 import mightypork.utils.logging.Log;
 import mightypork.utils.math.Calc.Buffers;
 import mightypork.utils.math.coord.Coord;
@@ -25,7 +25,7 @@ import org.newdawn.slick.openal.SoundStore;
  * @author MightyPork
  */
 @SuppressWarnings("unchecked")
-public class SoundSystem extends AppSubsystem {
+public class SoundSystem extends DelegatingBusClient {
 
 	private static final Coord INITIAL_LISTENER_POS = new Coord(0, 0, 0);
 	private static final int MAX_SOURCES = 256;

src/mightypork/rogue/testing/TestConstraints.java

@@ -1,8 +1,8 @@
 package mightypork.rogue.testing;
 
 
+import mightypork.rogue.display.constraints.Bounding;
 import mightypork.rogue.display.constraints.Constraint;
-import mightypork.rogue.display.constraints.ConstraintContext;
 import mightypork.utils.math.coord.Coord;
 import mightypork.utils.math.coord.Rect;
 
@@ -11,7 +11,7 @@ public class TestConstraints {
 
 	public static void main(String[] args)
 	{
-		ConstraintContext context = new ConstraintContext() {
+		Bounding context = new Bounding() {
 
 			@Override
 			public Rect getRect()
@@ -25,7 +25,7 @@ public class TestConstraints {
 			private double height;
 
 
-			public Navbar(ConstraintContext context, double height) {
+			public Navbar(Bounding context, double height) {
 				super(context);
 				this.height = height;
 			}
@@ -44,7 +44,7 @@ public class TestConstraints {
 			private int tile;
 
 
-			public TileHorizontal(ConstraintContext context, int tileCount, int aTile) {
+			public TileHorizontal(Bounding context, int tileCount, int aTile) {
 				super(context);
 				this.count = tileCount;
 				setTile(aTile);

src/mightypork/rogue/testing/TestMsgbus.java

@@ -0,0 +1,219 @@
+package mightypork.rogue.testing;
+
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import mightypork.utils.logging.Log;
+import mightypork.utils.patterns.subscription.Handleable;
+import mightypork.utils.patterns.subscription.MessageBus;
+import mightypork.utils.patterns.subscription.clients.DelegatingClient;
+import mightypork.utils.patterns.subscription.clients.ToggleableClient;
+
+
+public class TestMsgbus {
+
+	public static void main(String[] args)
+	{
+		Log.create("runtime", new File("."), 0);
+
+		MessageBus bus = new MessageBus();
+
+		bus.createChannel(StringMessage.class, StringMessage.Listener.class);
+		bus.createChannel(IntMessage.class, IntMessage.Listener.class);
+
+		Delegator deleg1 = new Delegator("Deleg1");
+		Delegator deleg2 = new Delegator("Deleg2");
+		Toggleable togg1 = new Toggleable("Tog1");
+		Toggleable togg2 = new Toggleable("Tog2");
+		Toggleable plain1 = new Toggleable("Plain1");
+		Toggleable plain2 = new Toggleable("Plain2");
+		Toggleable plain3 = new Toggleable("Plain3");
+
+		PlainInt pint = new PlainInt("Ints");
+		PlainBoth pboth = new PlainBoth("Both");
+
+		bus.subscribe(deleg1);
+
+		deleg1.clients.add(togg1);
+		deleg1.clients.add(plain2);
+		deleg1.clients.add(deleg2);
+		deleg1.clients.add(pint);
+
+		deleg2.clients.add(deleg1);
+		deleg2.clients.add(togg1);
+		deleg2.clients.add(plain3);
+		deleg2.clients.add(pboth);
+
+		bus.subscribe(plain1);
+
+		bus.subscribe(togg2);
+
+		bus.broadcast(new StringMessage("<MSG>"));
+		bus.broadcast(new IntMessage(7));
+		bus.broadcast(new IntMessage(13));
+
+		deleg2.delegating = false;
+
+		bus.broadcast(new IntMessage(44));
+
+		deleg2.delegating = true;
+
+		bus.broadcast(new IntMessage(45));
+
+	}
+
+}
+
+
+class Delegator extends Plain implements DelegatingClient {
+
+	List<Object> clients = new ArrayList<Object>();
+	boolean delegating = true;
+
+
+	public Delegator(String name) {
+		super(name);
+	}
+
+
+	@Override
+	public Collection<Object> getChildClients()
+	{
+		return clients;
+	}
+
+
+	@Override
+	public boolean doesDelegate()
+	{
+		return delegating;
+	}
+}
+
+
+class Toggleable extends Plain implements ToggleableClient {
+
+	boolean subscribing = true;
+
+
+	public Toggleable(String name) {
+		super(name);
+	}
+
+
+	@Override
+	public boolean doesSubscribe()
+	{
+		return subscribing;
+	}
+}
+
+
+class Plain implements StringMessage.Listener {
+
+	String name;
+
+
+	public Plain(String name) {
+		this.name = name;
+	}
+
+
+	@Override
+	public void receive(StringMessage message)
+	{
+		System.out.println(name + " (STR) RECV: " + message.s);
+	}
+}
+
+
+class PlainInt implements IntMessage.Listener {
+
+	String name;
+
+
+	public PlainInt(String name) {
+		this.name = name;
+	}
+
+
+	@Override
+	public void receive(IntMessage message)
+	{
+		System.out.println(name + " (INT) RECV: " + message.i);
+	}
+}
+
+
+class PlainBoth implements IntMessage.Listener, StringMessage.Listener {
+
+	String name;
+
+
+	public PlainBoth(String name) {
+		this.name = name;
+	}
+
+
+	@Override
+	public void receive(IntMessage message)
+	{
+		System.out.println(name + " (both-INT) RECV: " + message.i);
+	}
+
+
+	@Override
+	public void receive(StringMessage message)
+	{
+		System.out.println(name + " (both-STR) RECV: " + message.s);
+	}
+}
+
+
+class StringMessage implements Handleable<StringMessage.Listener> {
+
+	String s;
+
+
+	StringMessage(String str) {
+		this.s = str;
+	}
+
+	public interface Listener {
+
+		public void receive(StringMessage message);
+	}
+
+
+	@Override
+	public void handleBy(Listener handler)
+	{
+		handler.receive(this);
+	}
+}
+
+
+class IntMessage implements Handleable<IntMessage.Listener> {
+
+	int i;
+
+
+	IntMessage(int i) {
+		this.i = i;
+	}
+
+	public interface Listener {
+
+		public void receive(IntMessage message);
+	}
+
+
+	@Override
+	public void handleBy(Listener handler)
+	{
+		handler.receive(this);
+	}
+}

src/mightypork/rogue/textures/Textures.java

@@ -6,6 +6,8 @@ import static org.lwjgl.opengl.GL11.*;
 import org.newdawn.slick.opengl.Texture;
 
 
+// TODO rewrite to use hashmap with keys
+
 /**
  * Texture loading class
  * 
@@ -13,62 +15,15 @@ import org.newdawn.slick.opengl.Texture;
  */
 public class Textures {
 
-	protected static Texture buttons_menu;
-	protected static Texture buttons_small;
-
-	// patterns need raw access (are repeated)
-	public static Texture steel_small_dk;
-	public static Texture steel_small_lt;
-	public static Texture steel_big_dk;
-	public static Texture steel_big_lt;
-	public static Texture steel_big_scratched;
-	public static Texture steel_brushed;
-	public static Texture steel_rivet_belts;
-	public static Texture water;
-
-	// particles need direct access
-	public static Texture snow;
-	public static Texture leaves;
-	public static Texture rain;
-	public static Texture circle;
-
 	protected static Texture logo;
-	protected static Texture widgets;
-	public static Texture program;
-	protected static Texture icons;
-
-	public static Texture map_tiles;
-	public static Texture map_shading;
-
-	// spotted
-	public static Texture turtle_blue;
-	public static Texture turtle_green;
-	public static Texture turtle_purple;
-	public static Texture turtle_yellow;
-
-	// misc
-	public static Texture turtle_red;
-	public static Texture turtle_brown_dk;
-	public static Texture turtle_brown_lt;
-	public static Texture turtle_brown_orn;
-	// a shadow sheet
-	public static Texture turtle_shadows;
-
-	public static Texture food;
-	public static Texture food_shadows;
 
 	private static final String GUI = "res/images/gui/";
-	private static final String PATTERNS = "res/images/patterns/";
-	private static final String PROGRAM = "res/images/program/";
-	private static final String TILES = "res/images/tiles/";
-	private static final String SPRITES = "res/images/sprites/";
-	private static final String PARTICLES = "res/images/particles/";
 
 
 	/**
 	 * Load what's needed for splash
 	 */
-	public static void loadForSplash()
+	public static void load()
 	{
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@@ -76,63 +31,9 @@ public class Textures {
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 
 		logo = TextureManager.load(GUI + "logo.png");
-		steel_small_dk = TextureManager.load(PATTERNS + "steel.png");
 
 		Tx.initForSplash();
-	}
-
-
-	/**
-	 * Load textures
-	 */
-	public static void load()
-	{
-		// gui
-		buttons_menu = TextureManager.load(GUI + "buttons_menu.png");
-		buttons_small = TextureManager.load(GUI + "buttons_small.png");
-		widgets = TextureManager.load(GUI + "widgets.png");
-		icons = TextureManager.load(GUI + "icons.png");
-
-		// patterns
-
-		steel_small_lt = TextureManager.load(PATTERNS + "steel_light.png"); // XXX Unused texture
-		steel_big_dk = TextureManager.load(PATTERNS + "steel_big.png");
-		steel_big_lt = TextureManager.load(PATTERNS + "steel_big_light.png");
-		steel_big_scratched = TextureManager.load(PATTERNS + "steel_big_scratched.png");
-		steel_brushed = TextureManager.load(PATTERNS + "steel_brushed.png");
-		steel_rivet_belts = TextureManager.load(PATTERNS + "rivet_belts.png");
-		water = TextureManager.load(PATTERNS + "water.png");
-
-		// particles
-		snow = TextureManager.load(PARTICLES + "snow.png");
-		leaves = TextureManager.load(PARTICLES + "leaves.png");
-		rain = TextureManager.load(PARTICLES + "rain.png");
-		circle = TextureManager.load(PARTICLES + "circle.png");
-
-		// program tiles
-		program = TextureManager.load(PROGRAM + "program.png");
-
-		// map tiles
-		map_tiles = TextureManager.load(TILES + "tiles.png");
-		map_shading = TextureManager.load(TILES + "shading.png");
-
-		// turtle
-		turtle_blue = TextureManager.load(SPRITES + "HD-blue.png");
-		turtle_yellow = TextureManager.load(SPRITES + "HD-yellow.png");
-		turtle_green = TextureManager.load(SPRITES + "HD-green.png");
-		turtle_purple = TextureManager.load(SPRITES + "HD-purple.png");
-		turtle_red = TextureManager.load(SPRITES + "HD-red.png");
-
-		turtle_brown_dk = TextureManager.load(SPRITES + "HD-brown-dk.png");
-		turtle_brown_lt = TextureManager.load(SPRITES + "HD-brown-lt.png");
-		turtle_brown_orn = TextureManager.load(SPRITES + "HD-brown-ornamental.png");
-		turtle_shadows = TextureManager.load(SPRITES + "HD-shadow.png");
-
-		food = TextureManager.load(SPRITES + "food.png");
-		food_shadows = TextureManager.load(SPRITES + "food-shadow.png");
-
 		glDisable(GL_TEXTURE_2D);
-
 		Tx.init();
 	}
 

src/mightypork/rogue/textures/Tx.java

@@ -1,6 +1,8 @@
 package mightypork.rogue.textures;
 
 
+// TODO rewrite
+
 /**
  * List of texture quads for GUIs
  * 

src/mightypork/utils/logging/Log.java

@@ -141,6 +141,26 @@ public class Log {
 	}
 
 
+	/**
+	 * Create a logger. If this is the first logger made, then it'll be made
+	 * available via the static methods.<br>
+	 * Old logs will be kept.
+	 * 
+	 * @param logName log name (used for filename, must be application-unique)
+	 * @param logsDir directory to store logs in
+	 * @return the created Log instance
+	 */
+	public static synchronized LogInstance create(String logName, File logsDir)
+	{
+		if (logs.containsKey(logName)) return logs.get(logName);
+		LogInstance log = new LogInstance(logName, logsDir, -1);
+		if (main == null) main = log;
+		logs.put(logName, log);
+
+		return log;
+	}
+
+
 	public int addMonitor(LogMonitor mon)
 	{
 		if (main == null) throw new IllegalStateException("Main logger not initialized.");

src/mightypork/utils/logging/LogInstance.java

@@ -99,19 +99,26 @@ public class LogInstance {
 
 	private void cleanup()
 	{
+		if (logs_to_keep == 0) return; // overwrite
+
 		for (File f : FileUtils.listDirectory(file.getParentFile())) {
 			if (!f.isFile()) continue;
 			if (f.equals(file)) {
 				Date d = new Date(f.lastModified());
 
-				String fname = name + '_' + (new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss")).format(d) + getSuffix();
+				String fbase = name + '_' + (new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss")).format(d);
+				String suff = getSuffix();
+				String cntStr = "";
+				File f2;
 
-				File f2 = new File(dir, fname);
+				for (int cnt = 0; (f2 = new File(dir, fbase + cntStr + suff)).exists(); cntStr = "_" + (++cnt));
 
 				f.renameTo(f2);
 			}
 		}
 
+		if (logs_to_keep == -1) return; // keep all
+
 		List<File> oldLogs = FileUtils.listDirectory(dir, new FileFilter() {
 
 			@Override

src/mightypork/utils/objects/VarargsParser.java

@@ -18,6 +18,9 @@ import java.util.Map;
  * 
  * 
  * 
+ * 
+ * 
+ * 
  * Object[] array = { "one", 1, "two", 4, "three", 9, "four", 16 };
  * Map<String, Integer> args = new VarargsParser<String, Integer>().parse(array);
  * </pre>

src/mightypork/utils/patterns/subscription/MessageBus.java

@@ -1,8 +1,8 @@
 package mightypork.utils.patterns.subscription;
 
 
+import java.util.Collection;
 import java.util.LinkedHashSet;
-import java.util.Set;
 
 import mightypork.utils.logging.Log;
 
@@ -12,10 +12,12 @@ import mightypork.utils.logging.Log;
  * 
  * @author MightyPork
  */
-public class MessageBus implements Subscribable {
+final public class MessageBus {
+
+	private Collection<MessageChannel<?, ?>> channels = new LinkedHashSet<MessageChannel<?, ?>>();
+
+	private Collection<Object> clients = new LinkedHashSet<Object>();
 
-	private Set<MessageChannel<?, ?>> channels = new LinkedHashSet<MessageChannel<?, ?>>();
-	private Set<Object> clients = new LinkedHashSet<Object>();
 	private boolean warn_unsent = true;
 
 
@@ -38,10 +40,6 @@ public class MessageBus implements Subscribable {
 
 		channels.add(channel);
 
-		for (Object c : clients) {
-			channel.addSubscriber(c);
-		}
-
 		return channel;
 	}
 
@@ -54,10 +52,6 @@ public class MessageBus implements Subscribable {
 	public void removeChannel(MessageChannel<?, ?> channel)
 	{
 		channels.remove(channel);
-
-		for (Object c : clients) {
-			channel.removeSubscriber(c);
-		}
 	}
 
 
@@ -70,9 +64,11 @@ public class MessageBus implements Subscribable {
 	public boolean broadcast(Object message)
 	{
 		boolean sent = false;
+
 		for (MessageChannel<?, ?> b : channels) {
-			sent |= b.broadcast(message);
+			sent |= b.broadcast(message, clients);
 		}
+
 		if (!sent && warn_unsent) Log.w("Message not accepted by any channel: " + message);
 
 		return sent;
@@ -80,33 +76,29 @@ public class MessageBus implements Subscribable {
 
 
 	/**
-	 * Subscribe a client to the bus. The client will be connected to all
-	 * current and future channels, until removed from the bus.
+	 * Connect a client to the bus. The client will be connected to all current
+	 * and future channels, until removed from the bus.
 	 * 
+	 * @param client the client
 	 * @return true on success
 	 */
-	@Override
-	public boolean addSubscriber(Object client)
+	public boolean subscribe(Object client)
 	{
 		if (client == null) return false;
 
-		for (MessageChannel<?, ?> b : channels) {
-			b.addSubscriber(client);
-		}
-
 		clients.add(client);
 
 		return true;
 	}
 
 
-	@Override
-	public void removeSubscriber(Object client)
+	/**
+	 * Disconnect a client from the bus.
+	 * 
+	 * @param client the client
+	 */
+	public void unsubscribe(Object client)
 	{
-		for (MessageChannel<?, ?> b : channels) {
-			b.removeSubscriber(client);
-		}
-
 		clients.remove(client);
 	}
 

src/mightypork/utils/patterns/subscription/MessageChannel.java

@@ -1,22 +1,22 @@
 package mightypork.utils.patterns.subscription;
 
 
+import java.util.Collection;
 import java.util.HashSet;
-import java.util.Set;
+
+import mightypork.utils.logging.Log;
+import mightypork.utils.patterns.subscription.clients.DelegatingClient;
+import mightypork.utils.patterns.subscription.clients.ToggleableClient;
 
 
 /**
- * Message subsystem (broadcaster with clients) to which clients can subscribe.<br>
- * If more than one type of message is needed, {@link MessageBus} is a better
- * choice.
+ * Message channel, module of {@link MessageBus}
  * 
  * @author MightyPork
  * @param <MESSAGE> message type
  * @param <CLIENT> client (subscriber) type
  */
-public final class MessageChannel<MESSAGE extends Handleable<CLIENT>, CLIENT> implements Subscribable {
-
-	private Set<CLIENT> clients = new HashSet<CLIENT>();
+final public class MessageChannel<MESSAGE extends Handleable<CLIENT>, CLIENT> {
 
 	private Class<CLIENT> clientClass;
 	private Class<MESSAGE> messageClass;
@@ -24,61 +24,74 @@ public final class MessageChannel<MESSAGE extends Handleable<CLIENT>, CLIENT> im
 
 	public MessageChannel(Class<MESSAGE> messageClass, Class<CLIENT> clientClass) {
 
-		if (messageClass == null || clientClass == null) throw new IllegalArgumentException("Null Message or Client class.");
+		if (messageClass == null || clientClass == null) throw new NullPointerException("Null Message or Client class.");
 
 		this.clientClass = clientClass;
 		this.messageClass = messageClass;
 	}
 
 
-	@Override
-	public boolean addSubscriber(Object client)
-	{
-		if (!canSubscribe(client)) return false;
-
-		clients.add(clientClass.cast(client));
-		return true;
-	}
-
-
-	@Override
-	public void removeSubscriber(Object client)
-	{
-		clients.remove(client);
-	}
-
-
 	/**
 	 * Try to broadcast a message.<br>
 	 * If message is of wrong type, <code>false</code> is returned.
 	 * 
-	 * @param message a message to send
-	 * @return true if message was sent
+	 * @param message a message to be sent
+	 * @param clients collection of clients
+	 * @return true if message was accepted by this channel
 	 */
-	public boolean broadcast(Object message)
+	public boolean broadcast(Object message, Collection<Object> clients)
 	{
-
 		if (!canBroadcast(message)) return false;
 
 		MESSAGE evt = messageClass.cast(message);
 
-		for (CLIENT client : clients) {
-			sendTo(client, evt);
-		}
+		doBroadcast(evt, clients, new HashSet<Object>());
 
 		return true;
 	}
 
 
+	private void doBroadcast(MESSAGE message, Collection<Object> clients, Collection<Object> processed)
+	{
+		for (Object client : clients) {
+
+			// circular reference check
+			if (processed.contains(client)) {
+				Log.w("Client already served (subscribing twice?)");
+				continue;
+			}
+			processed.add(client);
+
+			// opt-out
+			if (client instanceof ToggleableClient) {
+				if (!((ToggleableClient) client).doesSubscribe()) {
+					continue;
+				}
+			}
+
+			sendTo(client, message);
+
+			if (client instanceof DelegatingClient) {
+				if (((DelegatingClient) client).doesDelegate()) {
+					doBroadcast(message, ((DelegatingClient) client).getChildClients(), processed);
+				}
+			}
+		}
+	}
+
+
 	/**
-	 * Send a message to a client
+	 * Send a message to a client.
 	 * 
 	 * @param client target client
 	 * @param message message to send
 	 */
-	private void sendTo(CLIENT client, MESSAGE message)
+	@SuppressWarnings("unchecked")
+	private void sendTo(Object client, MESSAGE message)
 	{
-		((Handleable<CLIENT>) message).handleBy(client);
+		if (clientClass.isInstance(client)) {
+			((Handleable<CLIENT>) message).handleBy((CLIENT) client);
+		}
 	}
 
 
@@ -86,34 +99,22 @@ public final class MessageChannel<MESSAGE extends Handleable<CLIENT>, CLIENT> im
 	 * Check if the given message can be broadcasted by this
 	 * {@link MessageChannel}
 	 * 
-	 * @param maybeMessage event object
+	 * @param message event object
 	 * @return can be broadcasted
 	 */
-	private boolean canBroadcast(Object maybeMessage)
-	{
-		return messageClass.isInstance(maybeMessage);
-	}
-
-
-	/**
-	 * Check if a client can subscribe to this {@link MessageChannel}
-	 * 
-	 * @param maybeClient client asking for subscription
-	 * @return can subscribe
-	 */
-	public boolean canSubscribe(Object maybeClient)
+	public boolean canBroadcast(Object message)
 	{
-		return clientClass.isInstance(maybeClient);
+		return message != null && messageClass.isInstance(message);
 	}
 
 
 	@Override
 	public int hashCode()
 	{
-		final int prime = 31;
+		final int prime = 13;
 		int result = 1;
-		result = prime * result + clientClass.getName().hashCode();
-		result = prime * result + messageClass.getName().hashCode();
+		result = prime * result + ((clientClass == null) ? 0 : clientClass.hashCode());
+		result = prime * result + ((messageClass == null) ? 0 : messageClass.hashCode());
 		return result;
 	}
 
@@ -124,13 +125,13 @@ public final class MessageChannel<MESSAGE extends Handleable<CLIENT>, CLIENT> im
 		if (this == obj) return true;
 		if (obj == null) return false;
 		if (!(obj instanceof MessageChannel)) return false;
-
 		MessageChannel<?, ?> other = (MessageChannel<?, ?>) obj;
-
-		if (!clientClass.getName().equals(other.clientClass.getName())) return false;
-
-		if (!messageClass.getName().equals(other.messageClass.getName())) return false;
-
+		if (clientClass == null) {
+			if (other.clientClass != null) return false;
+		} else if (!clientClass.equals(other.clientClass)) return false;
+		if (messageClass == null) {
+			if (other.messageClass != null) return false;
+		} else if (!messageClass.equals(other.messageClass)) return false;
 		return true;
 	}
 

src/mightypork/utils/patterns/subscription/Subscribable.java

@@ -1,26 +0,0 @@
-package mightypork.utils.patterns.subscription;
-
-
-/**
- * Subscribable object
- * 
- * @author MightyPork
- */
-public interface Subscribable {
-
-	/**
-	 * Subscribe a client to messages from this object
-	 * 
-	 * @param client a subscribing client
-	 * @return true if client is now subscribed
-	 */
-	public boolean addSubscriber(Object client);
-
-
-	/**
-	 * Unsubscribe a client from from this object
-	 * 
-	 * @param client a clientto unsubscribe
-	 */
-	public void removeSubscriber(Object client);
-}

src/mightypork/utils/patterns/subscription/clients/DelegatingClient.java

@@ -0,0 +1,25 @@
+package mightypork.utils.patterns.subscription.clients;
+
+
+import java.util.Collection;
+
+
+/**
+ * Client containing child clients
+ * 
+ * @author MightyPork
+ */
+public interface DelegatingClient {
+
+	/**
+	 * @return collection of child clients. Can not be null.
+	 */
+	public Collection<Object> getChildClients();
+
+
+	/**
+	 * @return true if delegating is active
+	 */
+	public boolean doesDelegate();
+
+}

src/mightypork/utils/patterns/subscription/clients/ToggleableClient.java

@@ -0,0 +1,16 @@
+package mightypork.utils.patterns.subscription.clients;
+
+
+/**
+ * Client that can toggle receiving messages.
+ * 
+ * @author MightyPork
+ */
+public interface ToggleableClient {
+
+	/**
+	 * @return true if the client wants to receive messages
+	 */
+	public boolean doesSubscribe();
+
+}