Graphics Refactor Initial

Graphics/public/EventHandler.hpp

@@ -0,0 +1,90 @@
+#pragma once
+
+#include "InputCodes.hpp"
+#include "Vec.hpp"
+#include "List.hpp"
+#include "Map.hpp"
+
+#include <mutex>
+
+namespace tp {
+
+	struct InputEvent {
+		enum class Type {
+			NONE,
+			BUTTON_ACTION,
+			MOUSE_DELTA,
+			MOUSE_POS,
+		} type = Type::NONE;
+
+		enum class ButtonAction {
+			NONE,
+			PRESS,
+			RELEASE,
+			REPEAT,
+		} buttonAction = ButtonAction::NONE;
+
+		Vec2F mouseEvent = { 0, 0 };
+	};
+
+	class InputState {
+		// Transitions from state to state is strict and defined by state order in the enum
+		// If posted event conflicts with that automata, we need to emulate intermediate states
+		enum State {
+			NONE, // Button is inactive
+			PRESSED, // Button is pressed
+			HOLD, // Button is still pressed
+			RELEASED, // Button is released
+		};
+
+		State mCurrentState;
+		State mPreviousState;
+
+	public:
+		InputState() = default;
+
+		void handleEvent(const InputEvent& event);
+
+		bool isStateChanged();
+
+		// true if event is no longer needed and false if we need to emulate some transitions further
+		bool isHandled();
+	};
+
+	// Assumes that user and event poster use different threads
+	// User can add own states for each input and decide how this state changes on specific events
+	// Event posters has no access to any custom state and only report any changes in any way
+	class EventHandler {
+	public:
+		EventHandler() = default;
+		~EventHandler();
+
+	public: // Event Poster Interface
+		void postEvent(InputID inputID, InputEvent inputEvent); // Record event
+
+	public: // User interface
+		bool isEvents();
+		void processEvent();
+
+		const Vec2F& getPointer() const;
+
+		bool isPressed(InputID id) const;
+		bool isReleased(InputID id) const;
+		bool isDown(InputID id) const;
+
+		halnf getScrollY() const;
+
+	private:
+		std::mutex mMutex = {};
+
+		// Store thread protected queue of posted events
+		List<InputEvent> mEventQueue;
+
+		// input states
+		Vec2F mPointer;
+		halnf pressure = 0;
+
+		InputState mInputStates[(int) InputID::LAST_KEY_CODE];
+	};
+
+}