use EventBus instead of ResolutionChangeListener

src/yugecin/opsudance/core/DisplayContainer.java

@@ -30,12 +30,12 @@ import org.newdawn.slick.opengl.InternalTextureLoader;
 import org.newdawn.slick.opengl.renderer.Renderer;
 import org.newdawn.slick.opengl.renderer.SGL;
 import org.newdawn.slick.util.Log;
+import yugecin.opsudance.core.events.EventBus;
 import yugecin.opsudance.errorhandling.ErrorDumpable;
+import yugecin.opsudance.events.ResolutionChangedEvent;
 import yugecin.opsudance.utils.GLHelper;
 
 import java.io.StringWriter;
-import java.util.LinkedList;
-import java.util.List;
 
 import static yugecin.opsudance.kernel.Entrypoint.sout;
 
@@ -46,9 +46,10 @@ public class DisplayContainer implements ErrorDumpable {
 
 	private static SGL GL = Renderer.get();
 
+	public final EventBus eventBus;
 	public final Demux demux;
+
 	private final DisplayMode nativeDisplayMode;
-	private final List<ResolutionChangeListener> resolutionChangeListeners;
 
 	private Graphics graphics;
 	private Input input;
@@ -70,19 +71,15 @@ public class DisplayContainer implements ErrorDumpable {
 	private String glVendor;
 
 	@Inject
-	public DisplayContainer(Demux demux) {
+	public DisplayContainer(Demux demux, EventBus eventBus) {
 		this.demux = demux;
+		this.eventBus = eventBus;
 		this.nativeDisplayMode = Display.getDisplayMode();
-		this.resolutionChangeListeners = new LinkedList<>();
 		targetRenderInterval = 16; // ~60 fps
 		targetBackgroundRenderInterval = 41; // ~24 fps
 		lastFrame = getTime();
 	}
 
-	public void addResolutionChangeListener(ResolutionChangeListener listener) {
-		resolutionChangeListeners.add(listener);
-	}
-
 	public void run() throws LWJGLException {
 		while(!(Display.isCloseRequested() && demux.onCloseRequest())) {
 			delta = getDelta();
@@ -170,9 +167,7 @@ public class DisplayContainer implements ErrorDumpable {
 
 		initGL();
 
-		for (ResolutionChangeListener resolutionChangeListener : resolutionChangeListeners) {
-			resolutionChangeListener.onDisplayResolutionChanged(width, height);
-		}
+		eventBus.post(new ResolutionChangedEvent(this.width, this.height));
 
 		if (displayMode.getBitsPerPixel() == 16) {
 			InternalTextureLoader.get().set16BitMode();

src/yugecin/opsudance/core/state/BaseOpsuState.java

@@ -18,11 +18,12 @@
 package yugecin.opsudance.core.state;
 
 import yugecin.opsudance.core.DisplayContainer;
-import yugecin.opsudance.core.ResolutionChangeListener;
+import yugecin.opsudance.core.events.EventListener;
+import yugecin.opsudance.events.ResolutionChangedEvent;
 
 import java.io.StringWriter;
 
-public abstract class BaseOpsuState implements OpsuState, ResolutionChangeListener {
+public abstract class BaseOpsuState implements OpsuState, EventListener<ResolutionChangedEvent> {
 
 	protected final DisplayContainer displayContainer;
 
@@ -34,14 +35,14 @@ public abstract class BaseOpsuState implements OpsuState, ResolutionChangeListen
 
 	public BaseOpsuState(DisplayContainer displayContainer) {
 		this.displayContainer = displayContainer;
-		displayContainer.addResolutionChangeListener(this);
+		displayContainer.eventBus.subscribe(ResolutionChangedEvent.class, this);
 	}
 
 	protected void revalidate() {
 	}
 
 	@Override
-	public void onDisplayResolutionChanged(int width, int height) {
+	public void onEvent(ResolutionChangedEvent event) {
 		if (isCurrentState) {
 			revalidate();
 			return;

src/yugecin/opsudance/events/ResolutionChangedEvent.java

@@ -15,10 +15,16 @@
  * You should have received a copy of the GNU General Public License
  * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
  */
-package yugecin.opsudance.core;
+package yugecin.opsudance.events;
 
-public interface ResolutionChangeListener {
+public class ResolutionChangedEvent {
 
-	void onDisplayResolutionChanged(int width, int height);
+	public final int width;
+	public final int height;
+
+	public ResolutionChangedEvent(int width, int height) {
+		this.width = width;
+		this.height = height;
+	}
 
 }

src/yugecin/opsudance/kernel/OpsuDanceModule.java

@@ -21,6 +21,7 @@ import com.google.inject.AbstractModule;
 import yugecin.opsudance.PreStartupInitializer;
 import yugecin.opsudance.core.DisplayContainer;
 import yugecin.opsudance.core.Demux;
+import yugecin.opsudance.core.events.EventBus;
 import yugecin.opsudance.core.state.transitions.EmptyTransitionState;
 import yugecin.opsudance.errorhandling.ErrorHandler;
 import yugecin.opsudance.states.EmptyRedState;
@@ -31,6 +32,8 @@ import yugecin.opsudance.core.state.transitions.FadeOutTransitionState;
 public class OpsuDanceModule extends AbstractModule {
 
 	protected void configure() {
+		bind(EventBus.class).asEagerSingleton();
+
 		bind(InstanceContainer.class).to(InstanceResolver.class);
 		bind(PreStartupInitializer.class).asEagerSingleton();
 		bind(Demux.class).asEagerSingleton();