InputSystem.h

/*----------------------------------------------
Ruben Young (rubenaryo@gmail.com)
Date : 2019/10
Description : Interface for the InputSystem class
----------------------------------------------*/
#ifndef INPUTSYSTEM_H
#define INPUTSYSTEM_H

#include <array>
#include <unordered_map>
#include "InputBinding.h"
#include "Camera.h"

#include <Windows.h>

namespace Input {
    
class InputSystem
{
public:
    InputSystem();
    virtual ~InputSystem();

    std::unordered_map<GameCommands, Chord*> activeKeyMap;

    // Main "Update" method
    void Frame(float dt, Camera* camera);

    // On WM_MOUSEMOVE message, trigger this method
    void OnMouseMove(short newX, short newY);

    // Returns the current mouse position as a POINT
    POINT GetMousePosition() const { return mouseCurrent; }

    // Returns the difference between current and previous as a std::pair
    std::pair<float, float> GetMouseDelta() const;

private:
    // Keyboard States
    std::array<BYTE, 256> keyboardCurrent;
    std::array<BYTE, 256> keyboardPrevious;

    // Mouse States
    POINT mouseCurrent;
    POINT mousePrevious;

    // returns the state of the key in enum form
    const KeyState GetKeyboardKeyState(const unsigned int pkeyCode) const;

    // returns true if the key is down
    inline const bool isPressed(int pkeyCode) const
    {
        return (GetAsyncKeyState(pkeyCode) & 0x8000) ? 1 : 0;
    }
    
    // Uses GetAsyncKeyState to read in 256 bytes
    void GetKeyboardState();

    // Clears Active Map, then populates it with new active keys
    void UpdateKeymaps();

    // Curr = Prev
    void UpdateMouseState();
    
    // Main "Update method" for input system
    void GetKeyboardInput();

protected:
    std::unordered_map<GameCommands, Chord*> keyMap;

    virtual void SetDefaultKeyMap();
};
}
#endif