stopwatch.h

#ifndef _ELMA_STOP_WATCH_H
#define _ELMA_STOP_WATCH_H

#include "elma/elma.h" // Note installation directory for elma

#include "on.h"
#include "off.h"
#include "user_interface.h"

namespace stopwatch {

    using namespace std::chrono;
    using namespace elma;    

    class StopWatch : public StateMachine {

        public:
        StopWatch();

        void begin();

        void reset();

        void stop();

        void lap();

        high_resolution_clock::duration value();

        const vector<high_resolution_clock::duration>& laps() { return _laps; }

        private:

        // When overriding the StateMachine class, put state declarations here.
        OnState on;
        OffState off;

        // Other private variables
        bool _running;
        high_resolution_clock::time_point _start_time;
        high_resolution_clock::duration _elapsed;
        vector<high_resolution_clock::duration> _laps;

    };

}

#endif