wordclock/libraries/Button/Button.h

#ifndef Button_h
#define Button_h

#include <Arduino.h>

typedef void (*ButtonCallbackFunction)();

class Button
{
public:
  Button(uint8_t _pin, uint8_t _mode);
  void begin();
  void loop(ButtonCallbackFunction callback);

private:
  uint8_t mode;
  uint8_t pin;
};

#endif