charcoal/OpenGLEngine/InputManager.h

#pragma once

#include <map>

#include <glm/glm.hpp>

// Define the Windows Virtual Keys for the numbers & letters

#define K_0 0x30
#define K_1 0x31
#define K_2 0x32
#define K_3 0x33
#define K_4 0x34
#define K_5 0x35
#define K_6 0x36
#define K_7 0x37
#define K_8 0x38
#define K_9 0x39

#define K_A 0x41
#define K_B 0x42
#define K_C 0x43
#define K_D 0x44
#define K_E 0x45
#define K_F 0x46
#define K_G 0x47
#define K_H 0x48
#define K_I 0x49
#define K_J 0x4a
#define K_K 0x4b
#define K_L 0x4c
#define K_M 0x4d
#define K_N 0x4e
#define K_O 0x4f
#define K_P 0x50
#define K_Q 0x51
#define K_R 0x52
#define K_S 0x53
#define K_T 0x54
#define K_U 0x55
#define K_V 0x56
#define K_W 0x57
#define K_X 0x58
#define K_Y 0x59
#define K_Z 0x5A

namespace charcoal
{
	using namespace glm;

	class InputManager
	{
	public:
		typedef int KeyCode;

		InputManager();
		virtual ~InputManager();

		//Should be called after each frame to reset the keysPressed
		void mark();

		bool is_key_down(KeyCode key_code) const;
		bool is_key_pressed(KeyCode key_code) const;
		bool is_key_released(KeyCode key_code) const;
		const ivec2& get_mouse_position() const;
		const ivec2& get_mouse_delta() const;
		const int& get_scroll_distance() const;

	protected:
		void key_down(KeyCode key_code);
		void key_up(KeyCode key_code);
		void mouse_move(const ivec2& position);
		void mouse_scroll(int distance);

	private:
		//Keys pressed since the last frame
		//The existance of a value in this array means that the key has changed to that state
		//since the last mark() call.
		//A value of true means the key was pressed, false means the value was released
		std::map<KeyCode, bool> m_keys_pressed;

		//Keys that are down
		std::map<KeyCode, bool> m_keys_down;

		//Current Mouse Position
		ivec2 m_mouse_position;

		//Change in mouse position since last mark() call
		ivec2 m_mouse_delta;

		//The change in scroll (mouse wheel) since the last mark() call
		int m_scroll_distance;

		//TODO: Controller Movement
	};
}