Merge branch 'wouter/events-poc' of github.com:lonkaars/crepe

7 files changed, 413 insertions, 0 deletions

diff --git a/mwe/events/include/event.h b/mwe/events/include/event.h
new file mode 100644
index 0000000..802140c
--- /dev/null
+++ b/mwe/events/include/event.h
@@ -0,0 +1,87 @@
+#pragma once
+#include <cstdint>
+#include <iostream>
+#include <string>
+#include <unordered_map>
+#include <variant>
+#include "keyCodes.h"
+
+class UUIDGenerator {
+public:
+    static std::uint32_t getUniqueID() {
+        static std::uint32_t id = 0;
+        return ++id;
+    }
+};
+#define REGISTER_EVENT_TYPE(ClassName) \
+public: \
+    static std::uint32_t getStaticEventType() { \
+        static std::uint32_t typeID = UUIDGenerator::getUniqueID(); \
+        return typeID; \
+    } \
+    virtual std::uint32_t getEventType() const override { \
+        return getStaticEventType(); \
+    }
+class Event {
+public:
+    Event(std::string eventType);
+    virtual ~Event() = default;
+    virtual std::uint32_t getEventType() const = 0;
+    virtual std::string toString() const;
+    void addArgument(const std::string& key, const std::variant<int, std::string, float>& value);
+
+    std::variant<int, std::string, float> getArgument(const std::string& key) const;
+
+    std::string getType() const;
+    bool getHandled() const;
+    void markHandled();
+
+private:
+    std::unordered_map<std::string, std::variant<int, std::string, float>> eventData;
+    bool isHandled = false;
+};
+
+// KeyPressedEvent class
+class KeyPressedEvent : public Event {
+public:
+    KeyPressedEvent(int keyCode);
+
+    REGISTER_EVENT_TYPE("KeyPressedEvent");
+
+    Keycode getKeyCode() const;
+    int getRepeatCount() const;
+
+private:
+    Keycode keycode;
+
+public:
+    Keycode key = 0;
+    int repeatCount = 0;
+};
+
+// KeyReleasedEvent class
+class KeyReleasedEvent : public Event {
+public:
+    KeyReleasedEvent(int keyCode);
+
+    REGISTER_EVENT_TYPE(KeyReleasedEvent);
+
+    Keycode getKeyCode() const;
+
+private:
+    Keycode key = 0;
+};
+
+// MousePressedEvent class
+class MousePressedEvent : public Event {
+public:
+    MousePressedEvent(int mouseX, int mouseY);
+
+    REGISTER_EVENT_TYPE(MousePressedEvent)
+
+    std::pair<int, int> getMousePosition() const;
+
+private:
+    int mouseX = 0;
+    int mouseY = 0;
+};
diff --git a/mwe/events/include/eventHandler.h b/mwe/events/include/eventHandler.h
new file mode 100644
index 0000000..e5b99d6
--- /dev/null
+++ b/mwe/events/include/eventHandler.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include "event.h"
+
+#include <functional>
+#include <iostream>
+template<typename EventType>
+using EventHandler = std::function<void(const EventType& e)>;
+
+class IEventHandlerWrapper {
+public:
+    virtual ~IEventHandlerWrapper() = default;
+
+    void exec(const Event& e);
+
+    virtual std::string getType() const = 0;
+    virtual bool isDestroyOnSuccess() const = 0;
+
+private:
+    virtual void call(const Event& e) = 0;
+};
+
+template<typename EventType>
+class EventHandlerWrapper : public IEventHandlerWrapper {
+public:
+    explicit EventHandlerWrapper(const EventHandler<EventType>& handler, const bool destroyOnSuccess = false)
+        : m_handler(handler)
+        , m_handlerType(m_handler.target_type().name())
+        , m_destroyOnSuccess(destroyOnSuccess)
+    { 
+		// std::cout << m_handlerType << std::endl;
+	}
+
+private:
+    void call(const Event& e) override
+    {
+        if (e.getEventType() == EventType::getStaticEventType()) {
+            m_handler(static_cast<const EventType&>(e));
+        }
+    }
+
+    std::string getType() const override { return m_handlerType; }
+    bool isDestroyOnSuccess() const { return m_destroyOnSuccess; }
+
+    EventHandler<EventType> m_handler;
+    const std::string m_handlerType;
+    bool m_destroyOnSuccess { false };
+};
diff --git a/mwe/events/include/eventManager.h b/mwe/events/include/eventManager.h
new file mode 100644
index 0000000..709796a
--- /dev/null
+++ b/mwe/events/include/eventManager.h
@@ -0,0 +1,57 @@
+#pragma once
+#include <unordered_map>
+#include <memory>
+#include "event.h"
+#include "keyCodes.h"
+#include "eventHandler.h"
+#include <vector>
+// using EventType = std::uint32_t;
+// using EventId = std::uint64_t;
+
+class EventManager {
+public:
+    EventManager(const EventManager&) = delete;
+    const EventManager& operator=(const EventManager&) = delete;
+    static EventManager& getInstance() {
+        static EventManager instance;
+        return instance;
+    }
+
+    void shutdown();
+    void subscribe(int eventType, std::unique_ptr<IEventHandlerWrapper>&& handler, int eventId);
+    void unsubscribe(int eventType, const std::string& handlerName, int eventId);
+    void triggerEvent(const Event& event_, int eventId);
+    void queueEvent(std::unique_ptr<Event>&& event_, int eventId);
+    void dispatchEvents();
+
+private:
+    EventManager() = default;
+    std::vector<std::pair<std::unique_ptr<Event>, int>> m_eventsQueue;
+    std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>> m_subscribers;
+    std::unordered_map<int, std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>> m_subscribersByEventId;
+};
+
+
+template<typename EventType>
+inline void subscribe(const EventHandler<EventType>& callback, int eventId = 0, const bool unsubscribeOnSuccess = false)
+{
+    std::unique_ptr<IEventHandlerWrapper> handler = std::make_unique<EventHandlerWrapper<EventType>>(callback, unsubscribeOnSuccess);
+    EventManager::getInstance().subscribe(EventType::getStaticEventType(), std::move(handler), eventId);
+}
+
+template<typename EventType>
+inline void unsubscribe(const EventHandler<EventType>& callback, int eventId = 0)
+{
+    const std::string handlerName = callback.target_type().name();
+    EventManager::getInstance().unsubscribe(EventType::getStaticEventType(), handlerName, eventId);
+}
+
+inline void triggerEvent(const Event& triggeredEvent, int eventId = 0)
+{
+    EventManager::getInstance().triggerEvent(triggeredEvent, eventId);
+}
+
+inline void queueEvent(std::unique_ptr<Event>&& queuedEvent, int eventId = 0)
+{
+    EventManager::getInstance().queueEvent(std::forward<std::unique_ptr<Event>>(queuedEvent), eventId);
+}
diff --git a/mwe/events/include/keyCodes.h b/mwe/events/include/keyCodes.h
new file mode 100644
index 0000000..c3a7826
--- /dev/null
+++ b/mwe/events/include/keyCodes.h
@@ -0,0 +1,143 @@
+#pragma once
+#include <cstdint>
+#include <unordered_map>
+#include <SDL2/SDL.h>
+using Keycode = uint16_t;
+enum : Keycode {
+    // From glfw3.h
+    Space = 32,
+    Apostrophe = 39, /* ' */
+    Comma = 44,      /* , */
+    Minus = 45,      /* - */
+    Period = 46,     /* . */
+    Slash = 47,      /* / */
+
+    D0 = 48, /* 0 */
+    D1 = 49, /* 1 */
+    D2 = 50, /* 2 */
+    D3 = 51, /* 3 */
+    D4 = 52, /* 4 */
+    D5 = 53, /* 5 */
+    D6 = 54, /* 6 */
+    D7 = 55, /* 7 */
+    D8 = 56, /* 8 */
+    D9 = 57, /* 9 */
+
+    Semicolon = 59, /* ; */
+    Equal = 61,     /* = */
+
+    A = 65,
+    B = 66,
+    C = 67,
+    D = 68,
+    E = 69,
+    F = 70,
+    G = 71,
+    H = 72,
+    I = 73,
+    J = 74,
+    K = 75,
+    L = 76,
+    M = 77,
+    N = 78,
+    O = 79,
+    P = 80,
+    Q = 81,
+    R = 82,
+    S = 83,
+    T = 84,
+    U = 85,
+    V = 86,
+    W = 87,
+    X = 88,
+    Y = 89,
+    Z = 90,
+
+    LeftBracket = 91,  /* [ */
+    Backslash = 92,    /* \ */
+    RightBracket = 93, /* ] */
+    GraveAccent = 96,  /* ` */
+
+    World1 = 161, /* non-US #1 */
+    World2 = 162, /* non-US #2 */
+
+    /* Function keys */
+    Escape = 256,
+    Enter = 257,
+    Tab = 258,
+    Backspace = 259,
+    Insert = 260,
+    Delete = 261,
+    Right = 262,
+    Left = 263,
+    Down = 264,
+    Up = 265,
+    PageUp = 266,
+    PageDown = 267,
+    Home = 268,
+    End = 269,
+    CapsLock = 280,
+    ScrollLock = 281,
+    NumLock = 282,
+    PrintScreen = 283,
+    Pause = 284,
+    F1 = 290,
+    F2 = 291,
+    F3 = 292,
+    F4 = 293,
+    F5 = 294,
+    F6 = 295,
+    F7 = 296,
+    F8 = 297,
+    F9 = 298,
+    F10 = 299,
+    F11 = 300,
+    F12 = 301,
+    F13 = 302,
+    F14 = 303,
+    F15 = 304,
+    F16 = 305,
+    F17 = 306,
+    F18 = 307,
+    F19 = 308,
+    F20 = 309,
+    F21 = 310,
+    F22 = 311,
+    F23 = 312,
+    F24 = 313,
+    F25 = 314,
+
+    /* Keypad */
+    KP0 = 320,
+    KP1 = 321,
+    KP2 = 322,
+    KP3 = 323,
+    KP4 = 324,
+    KP5 = 325,
+    KP6 = 326,
+    KP7 = 327,
+    KP8 = 328,
+    KP9 = 329,
+    KPDecimal = 330,
+    KPDivide = 331,
+    KPMultiply = 332,
+    KPSubtract = 333,
+    KPAdd = 334,
+    KPEnter = 335,
+    KPEqual = 336,
+
+    LeftShift = 340,
+    LeftControl = 341,
+    LeftAlt = 342,
+    LeftSuper = 343,
+    RightShift = 344,
+    RightControl = 345,
+    RightAlt = 346,
+    RightSuper = 347,
+    Menu = 348
+};
+// Define the mapping
+extern const std::unordered_map<SDL_Keycode, Keycode> sdlToCustom;
+
+// Function to map SDL_Keycode to custom Keycode
+Keycode getCustomKey(SDL_Keycode sdlKey);
diff --git a/mwe/events/include/loopManager.h b/mwe/events/include/loopManager.h
new file mode 100644
index 0000000..5c519d9
--- /dev/null
+++ b/mwe/events/include/loopManager.h
@@ -0,0 +1,28 @@
+#pragma once
+#include "window.h"
+#include <SDL2/SDL.h>
+#include "timer.h"
+//#include "combinedEvent.h"
+#include "eventManager.h"
+#include "loopManager.h"
+#include "eventHandler.h"
+class LoopManager {
+public:
+	LoopManager();
+	void setup();
+	void loop();
+	void setRunning(bool running);
+private:
+	void processInput();
+	void update();
+	void lateUpdate();
+	void fixedUpdate();
+	void render();
+	bool gameRunning = false;
+	WindowManager window;
+	int timeScale = 1;
+	float accumulator = 0.0;
+	double currentTime;
+	double t = 0.0;
+	double dt = 0.01;
+};
diff --git a/mwe/events/include/timer.h b/mwe/events/include/timer.h
new file mode 100644
index 0000000..22383b2
--- /dev/null
+++ b/mwe/events/include/timer.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+
+class LoopTimer {
+public:
+	static LoopTimer & getInstance();
+	void start();
+	void update();
+	double getDeltaTime() const;
+	int getCurrentTime() const;
+	void advanceFixedUpdate();
+	double getFixedDeltaTime() const;
+	void setFPS(int FPS);
+	int getFPS() const;
+	void enforceFrameRate();
+	double getLag() const;
+
+private:
+	LoopTimer();
+	int FPS = 50;
+	double gameScale = 1;
+	double maximumDeltaTime = 0.25;
+	double deltaTime;
+	double frameTargetTime = FPS / 1000;
+	double fixedDeltaTime = 0.01;
+	double elapsedTime;
+	double elapsedFixedTime;
+	double time;
+	uint64_t lastFrameTime;
+};
diff --git a/mwe/events/include/window.h b/mwe/events/include/window.h
new file mode 100644
index 0000000..9020b1a
--- /dev/null
+++ b/mwe/events/include/window.h
@@ -0,0 +1,19 @@
+#pragma once
+#include <SDL2/SDL.h>
+#include <iostream>
+#include <vector>
+class WindowManager {
+public:
+	WindowManager();
+	virtual ~WindowManager();
+	bool initWindow();
+	void destroyWindow();
+
+	SDL_Renderer * getRenderer();
+
+private:
+	const int SCREEN_WIDTH = 800;
+	const int SCREEN_HEIGHT = 600;
+	SDL_Window * window = NULL;
+	SDL_Renderer * renderer = NULL;
+};