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#include <map>
class Button
{
public:
/**
* Constructor.
*
* @param pin the pin to monitor
*/
Button( int pin );
/**
* Add a duration at which the specified event id should be triggered.
*
* @oaram duration the time at which the event should be triggered
* @param event_id a unique identifier for the event (not 0)
*/
void add_event_at( int duration, int event_id );
/**
* Update internal state
*/
int update();
/**
* Retrieve the event id of the event that was triggered at the last
* update, if there was one.
*
* @return event id, or 0
*/
int get_triggered_event();
protected:
/** pin */
int _pin;
/** last state */
bool _last_state;
/** milliseconds since last state change */
int _last_millis;
/** triggered event */
int _event_id;
/** press events durations -> event ids */
std::map< int, int > _press_events;
};
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