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event_queue.h
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event_queue.h
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// Copyright 2011 Emilie Gillet.
//
// Author: Emilie Gillet (emilie.o.gillet@gmail.com)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// -----------------------------------------------------------------------------
//
// Event queue.
#ifndef STMLIB_UI_EVENT_QUEUE_H_
#define STMLIB_UI_EVENT_QUEUE_H_
#include "stmlib/stmlib.h"
#include "stmlib/utils/ring_buffer.h"
#include "stmlib/system/system_clock.h"
namespace stmlib {
enum ControlType {
CONTROL_POT = 0,
CONTROL_ENCODER = 1,
CONTROL_ENCODER_CLICK = 2,
CONTROL_ENCODER_LONG_CLICK = 3,
CONTROL_SWITCH = 4,
CONTROL_SWITCH_HOLD = 5,
CONTROL_REFRESH = 0xff
};
struct Event {
ControlType control_type;
uint16_t control_id;
int32_t data;
};
template<uint16_t size = 32>
class EventQueue {
public:
EventQueue() { }
void Init() {
events_.Init();
}
void Flush() {
events_.Flush();
};
void AddEvent(ControlType control_type, uint16_t id, int32_t data) {
Event e;
e.control_type = control_type;
e.control_id = id;
e.data = data;
events_.Overwrite(e);
Touch();
}
void Touch() {
last_event_time_ = system_clock.milliseconds();
}
size_t available() {
return events_.readable();
}
uint32_t idle_time() {
uint32_t now = system_clock.milliseconds();
return now - last_event_time_;
}
Event PullEvent() {
return events_.ImmediateRead();
}
private:
uint32_t last_event_time_;
RingBuffer<Event, size> events_;
};
} // namespace stmlib
#endif // STMLIB_UI_EVENT_QUEUE_H_