gamepad.hpp

#pragma once
#include <stddef.h>
#include <thread>
#include <memory>
#include <stdint.h>
#include <functional>

enum class AxisNames{
    LSX=0,LSY=1,RSX=2,RSY=3,RT=4,LT=5,DX=6,DY=7
};

static inline const char* GetAxisName(AxisNames name){
	const char* names[]= {"LSX","LSY","RSX","RSY","RT","LT","DX","DY"};
	int idx=(int)name;
	const int cnt=sizeof(names)/sizeof(names[0]);
	return idx<cnt?names[idx]:"Unknown";
}


enum class ButtonNames{
    A=0,B=1,X=2,Y=3,LB=4,RB=5,BACK=6,START=7,CROSS=8,AXISL=9,AXISR=10
};

static inline const char* GetButtonName(ButtonNames name){
	const char* names[]= {"A","B","X","Y","LB","RB","BACK","START","CROSS","AXISL","AXISR"};
	int idx=(int)name;
	const int cnt=sizeof(names)/sizeof(names[0]);
	return idx<cnt?names[idx]:"Unkwnown";
}

class GamePad{
private:
    int fd;//ゲームパッドのファイル識別子
    std::unique_ptr<std::thread> task{nullptr};
    int button_num{0},axis_num{0};
    bool *buttons{nullptr};
    int *axises{nullptr};
    typedef std::function<void(const GamePad*,ButtonNames,bool)> button_event_t;
    typedef std::function<void(const GamePad*,AxisNames,float)> axis_event_t;
    button_event_t button_event{nullptr};
    axis_event_t axis_event{nullptr};

    void Update ();//ここで非同期で値を取得する。
public:
    GamePad(const char* filename);
    virtual ~GamePad();
    void Status()const;//標準入出力へ状態を表示
    //イベント関数設定
    inline void SetButtonChangedEvent(const button_event_t& event=nullptr){
        button_event=event;
    }

    inline void SetAxisChangedEvent(const axis_event_t& event=nullptr){
        axis_event=event;
    }

    //状態確認
    inline bool GetButton(int id)const{
        return id<button_num?buttons[id]:false;
    }
    inline bool GetButton(ButtonNames name)const{
        return GetButton((int)name);
    }

    inline int GetAxisRaw(int id)const{
        return id<axis_num?axises[id]:0;
    }
    inline int GetAxisRaw(AxisNames name)const{
        return GetAxisRaw((int)name);
    }

    inline float GetAxis(int id)const{
        return (float)GetAxisRaw(id)/INT16_MAX;
    }
    inline float GetAxis(AxisNames name)const{
        return GetAxis((int)name);
    }

    //ボタンの個数
    inline int GetButtonNum()const{
        return button_num;
    }

    inline int GetAxisNum()const{
        return axis_num;
    }
};