#ifndef _SENSORS_H_DEF_
#define _SENSORS_H_DEF_

	#define HOLD_MS_THRESHOLD	2000

	// push button non-blocking state
	class PushButton {
		public:
			void setup(const int pin);
			bool tap(); // button has been pushed for a short amount of time
			bool hold(); // button has been pushed for at least HOLD_MS_THRESHOLD milliseconds

		private:
			// returns whether the button state changed
			bool tick();


			// value of millis() when the button is down
			unsigned long _pushStart { 0 };
			bool _pushed { false };
			int _pin { 0 };
	};

	// potentiometer value
	class Potentiometer {
		public:
			void setup(const int pin);
			short range();

		private:
			int _pin { 0 };
	};

	// pressure sensors
	class Pressure {
		public:
			void setup(const int pin);
			short value();

		private:
			int _pin { 0 };
	};

#endif