tdesktop/Telegram/SourceFiles/base/timer.h

112 lines
2.3 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#pragma once
#include "base/lambda.h"
#include "base/observer.h"
namespace base {
class Timer final : private QObject {
public:
explicit Timer(
not_null<QThread*> thread,
base::lambda<void()> callback = nullptr);
explicit Timer(base::lambda<void()> callback = nullptr);
static Qt::TimerType DefaultType(TimeMs timeout) {
constexpr auto kThreshold = TimeMs(1000);
return (timeout > kThreshold) ? Qt::CoarseTimer : Qt::PreciseTimer;
}
void setCallback(base::lambda<void()> callback) {
_callback = std::move(callback);
}
void callOnce(TimeMs timeout) {
callOnce(timeout, DefaultType(timeout));
}
void callEach(TimeMs timeout) {
callEach(timeout, DefaultType(timeout));
}
void callOnce(TimeMs timeout, Qt::TimerType type) {
start(timeout, type, Repeat::SingleShot);
}
void callEach(TimeMs timeout, Qt::TimerType type) {
start(timeout, type, Repeat::Interval);
}
bool isActive() const {
return (_timerId != 0);
}
void cancel();
TimeMs remainingTime() const;
static void Adjust();
protected:
void timerEvent(QTimerEvent *e) override;
private:
enum class Repeat : unsigned {
Interval = 0,
SingleShot = 1,
};
void start(TimeMs timeout, Qt::TimerType type, Repeat repeat);
void adjust();
void setTimeout(TimeMs timeout);
int timeout() const;
void setRepeat(Repeat repeat) {
_repeat = static_cast<unsigned>(repeat);
}
Repeat repeat() const {
return static_cast<Repeat>(_repeat);
}
base::lambda<void()> _callback;
TimeMs _next = 0;
int _timeout = 0;
int _timerId = 0;
Qt::TimerType _type : 2;
bool _adjusted : 1;
unsigned _repeat : 1;
};
class DelayedCallTimer final : private QObject {
public:
int call(TimeMs timeout, lambda_once<void()> callback) {
return call(
timeout,
std::move(callback),
Timer::DefaultType(timeout));
}
int call(
TimeMs timeout,
lambda_once<void()> callback,
Qt::TimerType type);
void cancel(int callId);
protected:
void timerEvent(QTimerEvent *e) override;
private:
base::flat_map<int, lambda_once<void()>> _callbacks;
};
} // namespace base