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/*
* button.h
*
* Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.
*
* This file is part of propeller-clock (hereafter referred to as "this
* program"). See http://ed.am/dev/software/arduino/propeller-clock for more
* information.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _BUTTON_H_
#define _BUTTON_H_
#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;
/** current state */
bool _state;
/** time when current state began */
unsigned long _state_millis;
/** milliseconds that have been accountred for (in terms of
* triggering events) since current state began */
unsigned long _state_duration;
/** triggered event */
int _event_id;
/** press events durations -> event ids */
std::map< int, int > _press_events;
};
#endif //_BUTTON_H_
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