From 87302a37135dd75f753577fd2fa9720c83fa0e1a Mon Sep 17 00:00:00 2001
From: 3wc <3wc@doesthisthing.work>
Date: Wed, 14 Feb 2024 00:21:02 -0300
Subject: [PATCH] Add EventBus and GameScene from ecs

---
 res/style.css                            |  12 +-
 src/DialogueBox.hx                       |   4 +-
 src/Game.hx                              | 209 ++++++++++++++++-------
 src/Main.hx                              |  50 +-----
 src/event/ChangeSceneEvent.hx            |  11 ++
 src/event/EventBus.hx                    |  47 +++++
 src/event/IEvent.hx                      |   3 +
 src/scene/GameScene.hx                   |   5 +
 src/scene/TitleScene.hx                  |  55 ++++++
 src/{World.hx => scene/WorldMapScene.hx} |  31 ++--
 src/screens/TitleScreen.hx               |  33 ----
 11 files changed, 297 insertions(+), 163 deletions(-)
 create mode 100644 src/event/ChangeSceneEvent.hx
 create mode 100644 src/event/EventBus.hx
 create mode 100644 src/event/IEvent.hx
 create mode 100644 src/scene/GameScene.hx
 create mode 100644 src/scene/TitleScene.hx
 rename src/{World.hx => scene/WorldMapScene.hx} (72%)
 delete mode 100644 src/screens/TitleScreen.hx

diff --git a/res/style.css b/res/style.css
index 5dac9ab..df632ff 100644
--- a/res/style.css
+++ b/res/style.css
@@ -1,13 +1,21 @@
+text {
+	font : url("res/font/minecraftia_regular_6.fnt")
+}
+
+game-container {
+	background: blue;
+}
+
 .mybox {
 	background: #080;
 	padding: -10;
 }
 
-view.mybox {
+heading.mybox {
 	padding: 10;
 }
 
-title-screen {
+title-scene {
 	max-width: 300;
 	layout: vertical;
 }
diff --git a/src/DialogueBox.hx b/src/DialogueBox.hx
index dc40ac8..e00901c 100644
--- a/src/DialogueBox.hx
+++ b/src/DialogueBox.hx
@@ -16,8 +16,8 @@ class DialogueBox extends h2d.Object {
 		super();
 		if (text == null)
 			text = "NULL";
-		game = Game.inst;
-		game.scene.add(this, 1);
+		game = Game.current;
+		game.root.add(this, 1);
 		bg = new h2d.ScaleGrid(Res.ui.toTile(), 5, 5, this);
 		bg.colorKey = 0xFF00FF;
 		tf = new h2d.Text(game.font, this);
diff --git a/src/Game.hx b/src/Game.hx
index 2b9eaaa..6ad44ca 100644
--- a/src/Game.hx
+++ b/src/Game.hx
@@ -1,85 +1,164 @@
-import Const;
-import DialogueBox;
-import DialogueManager;
-import DialogueManager.Option;
+import h2d.Layers;
+import h2d.Console;
+
+import scene.TitleScene;
+import scene.WorldMapScene;
+import scene.GameScene;
+import event.EventBus;
+import event.ChangeSceneEvent;
+
+import Const;
+// import DialogueBox;
+// import DialogueManager;
+// import DialogueManager.Option;
+
+@:uiComp("game-container")
+class GameContainer extends h2d.Flow implements h2d.domkit.Object {
+	static var SRC = <game-container>
+	  ${scene}
+	</game-container>;
+
+	public var scene:GameScene;
+
+	public function new(?parent) {
+		super(parent);
+		initComponent();
+	}
+}
 
-@:publicFields
 class Game extends hxd.App {
-	public var scene:h2d.Scene;
 	public var font:h2d.Font;
-	public var world:World;
 	public var curDialogue:h2d.Object;
 	public var actions:Array<h2d.ScaleGrid> = [];
 	public var dialogueManager:DialogueManager;
 
+	public var globalEventBus:EventBus;
+	public static var current:Game;  // Current Game (singleton)
+
+	// var layer:Layers;
+	public var root:GameContainer;
+	var console:Console;
+	var style = null;
+
 	override function init() {
-		scene = s2d;
 		s2d.scaleMode = Stretch(Const.W, Const.H + 12);
-		world = new World(Res.map, Res.tiles);
-		s2d.add(world.root, 0);
 
-		font = Res.font.minecraftia_regular_6.toFont();
-		font.resizeTo(24);
+		#if hl
+		hxd.res.Resource.LIVE_UPDATE = true;
+		hxd.Res.initLocal();
+		#else
+		hxd.Res.initEmbed();
+		#end
 
-		dialogueManager = new DialogueManager(dialogue, renderActions);
+		root = new GameContainer();
+		root.horizontalAlign = root.verticalAlign = Middle;
+		s2d.add(root);
+		onResize();
 
-		var yarnText = [
-			hxd.Res.text.intro.entry.getText(),
-		];
-		var yarnFileNames = [
-			hxd.Res.text.intro.entry.name,
-		];
-		dialogueManager.load(yarnText, yarnFileNames);
-		dialogueManager.runNode("Intro");
+		style = new h2d.domkit.Style();
+		style.load(hxd.Res.style);
+		style.allowInspect = true;
+		style.addObject(root);
+
+		globalEventBus = new EventBus(console);
+		globalEventBus.subscribe(ChangeSceneEvent, onChangeScene);
+
+		#if debug
+		setGameScene(new WorldMapScene(root));
+		#else
+		setGameScene(new TitleScene(root));
+		#end
+
+		// font = Res.font.minecraftia_regular_6.toFont();
+		// font.resizeTo(24);
+        //
+		// dialogueManager = new DialogueManager(dialogue, renderActions);
+        //
+		// var yarnText = [
+		// 	hxd.Res.text.intro.entry.getText(),
+		// ];
+		// var yarnFileNames = [
+		// 	hxd.Res.text.intro.entry.name,
+		// ];
+		// dialogueManager.load(yarnText, yarnFileNames);
+		// dialogueManager.runNode("Intro");
 	}
 
-	public static var inst:Game;
-
-	function dialogue(manager:DialogueManager, t:String) {
-		var d = new DialogueBox(Const.W, 100, t);
-		d.y = 0;
-		d.onClick = function() {
-			manager.resume();
-		};
-
-		curDialogue = d;
+	public function new() {
+		super();
+		current = this;
 	}
 
-	function renderActions(manager:DialogueManager, t:Array<Option>) {
-		for (action in t) {
-			addAction(action.text, action.callback);
+	override function onResize() {
+		root.minWidth = root.maxWidth = s2d.width;
+		root.minHeight = root.maxHeight = s2d.height;
+	}
+
+	override function update(dt:Float) {
+		style.sync();
+	}
+
+	// function dialogue(manager:DialogueManager, t:String) {
+	// 	var d = new DialogueBox(Const.W, 100, t);
+	// 	d.y = 0;
+	// 	d.onClick = function() {
+	// 		manager.resume();
+	// 	};
+    //
+	// 	curDialogue = d;
+	// }
+    //
+	// function renderActions(manager:DialogueManager, t:Array<Option>) {
+	// 	for (action in t) {
+	// 		addAction(action.text, action.callback);
+	// 	}
+	// }
+    //
+	// function newPanel(w, h) {
+	// 	var g = new h2d.ScaleGrid(Res.ui.toTile(), 5, 5);
+	// 	g.width = w;
+	// 	g.height = h;
+	// 	g.colorKey = 0xFF00FF;
+	// 	scene.add(g, 1);
+	// 	return g;
+	// }
+    //
+	// function addAction(a: String, callback: () -> Void) {
+	// 	var spr = newPanel(Const.W, 60);
+	// 	curDialogue.addChild(spr);
+	// 	var tf = new h2d.Text(font, spr);
+	// 	tf.text = a;
+	// 	tf.x = 10;
+	// 	tf.y = 10;
+	// 	spr.x = 0;
+	// 	spr.y = 100 + actions.length * 60;
+	// 	var int = new h2d.Interactive(spr.width, spr.height, spr);
+	// 	int.onClick = function(_) {
+	// 			for (action in actions) {
+	// 				action.remove();
+	// 			}
+	// 			callback();
+	// 			removeDialog();
+	// 	}
+	// 	int.cursor = Button;
+	// 	actions.push(spr);
+	// 	return spr;
+	// }
+
+	public function onChangeScene(event:ChangeSceneEvent) {
+		setGameScene(event.newScene);
+	}
+
+	public function setGameScene(gs:GameScene) {
+		#if debug
+		// console.resetCommands();
+		#end
+
+		if (root.scene != null) {
+			root.scene.getH2dObject().remove();
 		}
-	}
 
-	function newPanel(w, h) {
-		var g = new h2d.ScaleGrid(Res.ui.toTile(), 5, 5);
-		g.width = w;
-		g.height = h;
-		g.colorKey = 0xFF00FF;
-		scene.add(g, 1);
-		return g;
+		root.scene = gs;
+		style.addObject(gs.getH2dObject());
 	}
-
-	function addAction(a: String, callback: () -> Void) {
-		var spr = newPanel(Const.W, 60);
-		curDialogue.addChild(spr);
-		var tf = new h2d.Text(font, spr);
-		tf.text = a;
-		tf.x = 10;
-		tf.y = 10;
-		spr.x = 0;
-		spr.y = 100 + actions.length * 60;
-		var int = new h2d.Interactive(spr.width, spr.height, spr);
-		int.onClick = function(_) {
-				for (action in actions) {
-					action.remove();
-				}
-				callback();
-				// removeDialog();
-		}
-		int.cursor = Button;
-		actions.push(spr);
-		return spr;
-	}
-
 }
diff --git a/src/Main.hx b/src/Main.hx
index c97c7de..09941e3 100644
--- a/src/Main.hx
+++ b/src/Main.hx
@@ -1,51 +1,5 @@
-import screens.TitleScreen;
-
-class Main extends hxd.App {
-	var center:h2d.Flow;
-	var style = null;
-
-	override function init() {
-		center = new h2d.Flow(s2d);
-		center.horizontalAlign = center.verticalAlign = Middle;
-		onResize();
-		var root = new TitleScreen(Right, center);
-
-		root.btnNewGame.onClick = function() {
-			Game.inst = new Game();
-		}
-		root.btnContinueGame.onClick = function() {
-			root.btnContinueGame.dom.addClass("highlight");
-		}
-		#if hl
-		root.btnQuit.onClick = function() {
-			Sys.exit(0);
-		}
-	  #else
-		root.btnQuit.remove();
-		#end
-
-		style = new h2d.domkit.Style();
-		style.load(hxd.Res.style);
-		style.allowInspect = true;
-		style.addObject(root);
-	}
-
-	override function onResize() {
-		center.minWidth = center.maxWidth = s2d.width;
-		center.minHeight = center.maxHeight = s2d.height;
-	}
-
-	override function update(dt:Float) {
-		style.sync();
-	}
-
+class Main {
 	static function main() {
-		#if hl
-		hxd.res.Resource.LIVE_UPDATE = true;
-		hxd.Res.initLocal();
-		#else
-		hxd.Res.initEmbed();
-		#end
-		new Main();
+		new Game();
 	}
 }
diff --git a/src/event/ChangeSceneEvent.hx b/src/event/ChangeSceneEvent.hx
new file mode 100644
index 0000000..ff296c3
--- /dev/null
+++ b/src/event/ChangeSceneEvent.hx
@@ -0,0 +1,11 @@
+package event;
+
+import scene.GameScene;
+
+class ChangeSceneEvent implements IEvent {
+	public var newScene:GameScene;
+
+	public function new(gs:GameScene) {
+		this.newScene = gs;
+	}
+}
diff --git a/src/event/EventBus.hx b/src/event/EventBus.hx
new file mode 100644
index 0000000..901c243
--- /dev/null
+++ b/src/event/EventBus.hx
@@ -0,0 +1,47 @@
+package event;
+
+import h2d.Console;
+
+class EventBus {
+	var listeners = new Map<String, Array<Dynamic>>();
+	var console:Console;
+
+	public function new(console:Console) {
+		this.console = console;
+	}
+
+	public function subscribe<T:IEvent>(event:Class<T>, callback:(T) -> Void) {
+		var type = Type.getClassName(event);
+		if (!listeners.exists(type))
+			listeners.set(type, new Array<T>());
+
+		listeners.get(type).push(callback);
+	}
+
+	public function unsubscribe<T:IEvent>(event:Class<T>, callback:(T) -> Void) {
+		var type = Type.getClassName(event);
+		if (!listeners.exists(type))
+			return;
+
+		var callbacks = listeners.get(type);
+		for (c in callbacks) {
+			if (Reflect.compareMethods(c, callback)) {
+				callbacks.remove(c);
+				return;
+			}
+		}
+	}
+
+	public function publishEvent<T:IEvent>(event:T) {
+		var type = Type.getClassName(Type.getClass(event));
+		if (!listeners.exists(type)) {
+			#if debug
+			console.log('Publishing event with no listeners: $type');
+			#end
+			return;
+		}
+
+		for (func in listeners.get(type))
+			func(event);
+	}
+}
diff --git a/src/event/IEvent.hx b/src/event/IEvent.hx
new file mode 100644
index 0000000..f8ff27a
--- /dev/null
+++ b/src/event/IEvent.hx
@@ -0,0 +1,3 @@
+package event;
+
+interface IEvent {}
diff --git a/src/scene/GameScene.hx b/src/scene/GameScene.hx
new file mode 100644
index 0000000..7f5f6bd
--- /dev/null
+++ b/src/scene/GameScene.hx
@@ -0,0 +1,5 @@
+package scene;
+
+interface GameScene {
+    function getH2dObject():h2d.Object;
+}
diff --git a/src/scene/TitleScene.hx b/src/scene/TitleScene.hx
new file mode 100644
index 0000000..40e3d9d
--- /dev/null
+++ b/src/scene/TitleScene.hx
@@ -0,0 +1,55 @@
+package scene;
+
+import scene.WorldMapScene;
+
+import event.ChangeSceneEvent;
+
+import components.MenubuttonComponent;
+
+@:uiComp("heading")
+class HeadingComp extends h2d.Flow implements h2d.domkit.Object {
+	static var SRC = <heading class="mybox" min-width="200">
+		<text text={"Glass House"}/>
+		for( i in icons )
+			<bitmap src={i} id="icons[]"/>
+	</heading>;
+
+	public function new(icons:Array<h2d.Tile>, ?parent) {
+		super(parent);
+		initComponent();
+	}
+}
+
+@:uiComp("title-scene")
+class TitleScene extends h2d.Flow implements GameScene implements h2d.domkit.Object {
+	static var SRC = <title-scene>
+		<heading([]) id="view"/>
+		<menubutton("New game") public id="btnNewGame"/>
+		<menubutton("Continue game") public id="btnContinueGame"/>
+		<menubutton("Credits") public id="btnCredits"/>
+		<menubutton("Quit") public id="btnQuit"/>
+	</title-scene>;
+
+	public function new(?parent) {
+		super(parent);
+		initComponent();
+		btnNewGame.onClick = function() {
+			Game.current.globalEventBus.publishEvent(new ChangeSceneEvent(new WorldMapScene(Game.current.root)));
+		}
+		btnContinueGame.onClick = function() {
+			btnContinueGame.dom.addClass("highlight");
+		}
+		#if hl
+		btnQuit.onClick = function() {
+				Sys.exit(0);
+		}
+		#else
+				btnQuit.remove();
+		#end
+
+	}
+
+	public function getH2dObject() {
+		return this;
+	}
+}
diff --git a/src/World.hx b/src/scene/WorldMapScene.hx
similarity index 72%
rename from src/World.hx
rename to src/scene/WorldMapScene.hx
index 08c26ca..c87df74 100644
--- a/src/World.hx
+++ b/src/scene/WorldMapScene.hx
@@ -1,8 +1,8 @@
-class World {
-	var game:Game;
-	var map:hxd.res.TiledMap.TiledMapData;
+package scene;
 
-	public var root:h2d.Object;
+@:uiComp("world-map-scene")
+class WorldMapScene extends h2d.Flow implements GameScene implements h2d.domkit.Object {
+	var map:hxd.res.TiledMap.TiledMapData;
 
 	var layers:Map<String, {
 		name:String,
@@ -15,16 +15,17 @@ class World {
 	public var width:Int;
 	public var height:Int;
 
-	public function new(r:hxd.res.TiledMap, tiles:hxd.res.Image) {
-		game = Game.inst;
-		root = new h2d.Object();
-		map = r.toMap();
-		root = new h2d.Object();
+	public function new(?parent) {
+		super(parent);
+		initComponent();
+
+		var root = new h2d.Object(this);
+
+		map = Res.map.toMap();
 		width = map.width;
 		height = map.height;
-		var t = tiles.toTile();
+		var t = Res.tiles.toTile();
 		layers = new Map();
-		var font:h2d.Font = hxd.res.DefaultFont.get();
 		this.tiles = [
 			for (y in 0...Std.int(t.height) >> 5) for (x in 0...Std.int(t.width) >> 5) t.sub(x * 32, y * 32, 32, 32)
 		];
@@ -37,13 +38,16 @@ class World {
 				g: new h2d.TileGroup(t, root),
 				alpha: ld.opacity,
 			}
-			// l.g.colorKey = 0x1D8700;
 			l.g.alpha = ld.opacity;
 			layers.set(ld.name, l);
 			rebuildLayer(ld.name);
 		}
 	}
 
+	public function getH2dObject() {
+		return this;
+	}
+
 	function rebuildLayer(name:String) {
 		var l = layers.get(name);
 		if (l == null)
@@ -51,8 +55,9 @@ class World {
 		var pos = 0;
 		var g = l.g;
 		g.clear();
-		while (g.numChildren > 0)
+		while (g.numChildren > 0) {
 			g.getChildAt(0).remove();
+		}
 
 		for (y in 0...height)
 			for (x in 0...width) {
diff --git a/src/screens/TitleScreen.hx b/src/screens/TitleScreen.hx
deleted file mode 100644
index be125ed..0000000
--- a/src/screens/TitleScreen.hx
+++ /dev/null
@@ -1,33 +0,0 @@
-package screens;
-
-import components.MenubuttonComponent;
-
-@:uiComp("heading")
-class HeadingComp extends h2d.Flow implements h2d.domkit.Object {
-	static var SRC = <heading class="mybox" min-width="200" content-halign={align}>
-		<text text={"Rewild"}/>
-		for( i in icons )
-			<bitmap src={i} id="icons[]"/>
-	</heading>;
-
-	public function new(align:h2d.Flow.FlowAlign, icons:Array<h2d.Tile>, ?parent) {
-		super(parent);
-		initComponent();
-	}
-}
-
-@:uiComp("title-screen")
-class TitleScreen extends h2d.Flow implements h2d.domkit.Object {
-	static var SRC = <title-screen>
-		<heading(align,[]) id="view"/>
-		<menubutton("New game") public id="btnNewGame"/>
-		<menubutton("Continue game") public id="btnContinueGame"/>
-		<menubutton("Credits") public id="btnCredits"/>
-		<menubutton("Quit") public id="btnQuit"/>
-	</title-screen>;
-
-	public function new(align:h2d.Flow.FlowAlign, ?parent) {
-		super(parent);
-		initComponent();
-	}
-}