116 lines
2.8 KiB
C++
116 lines
2.8 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include "base/lambda.h"
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#include "base/observer.h"
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namespace base {
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class Timer final : private QObject {
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public:
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Timer(base::lambda<void()> callback = base::lambda<void()>());
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static Qt::TimerType DefaultType(TimeMs timeout) {
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constexpr auto kThreshold = TimeMs(1000);
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return (timeout > kThreshold) ? Qt::CoarseTimer : Qt::PreciseTimer;
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}
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void setCallback(base::lambda<void()> callback) {
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_callback = std::move(callback);
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}
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void callOnce(TimeMs timeout) {
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callOnce(timeout, DefaultType(timeout));
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}
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void callEach(TimeMs timeout) {
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callEach(timeout, DefaultType(timeout));
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}
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void callOnce(TimeMs timeout, Qt::TimerType type) {
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start(timeout, type, Repeat::SingleShot);
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}
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void callEach(TimeMs timeout, Qt::TimerType type) {
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start(timeout, type, Repeat::Interval);
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}
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bool isActive() const {
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return (_timerId != 0);
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}
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void cancel();
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TimeMs remainingTime() const;
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static void Adjust();
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protected:
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void timerEvent(QTimerEvent *e) override;
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private:
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enum class Repeat : unsigned {
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Interval = 0,
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SingleShot = 1,
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};
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void start(TimeMs timeout, Qt::TimerType type, Repeat repeat);
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void adjust();
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void setTimeout(TimeMs timeout);
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int timeout() const;
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void setRepeat(Repeat repeat) {
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_repeat = static_cast<unsigned>(repeat);
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}
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Repeat repeat() const {
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return static_cast<Repeat>(_repeat);
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}
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base::lambda<void()> _callback;
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TimeMs _next = 0;
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int _timeout = 0;
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int _timerId = 0;
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Qt::TimerType _type : 2;
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bool _adjusted : 1;
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unsigned _repeat : 1;
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};
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class DelayedCallTimer final : private QObject {
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public:
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int call(TimeMs timeout, lambda_once<void()> callback) {
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return call(timeout, std::move(callback), Timer::DefaultType(timeout));
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}
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int call(TimeMs timeout, lambda_once<void()> callback, Qt::TimerType type);
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void cancel(int callId);
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protected:
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void timerEvent(QTimerEvent *e) override;
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private:
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std::map<int, lambda_once<void()>> _callbacks; // Better to use flatmap.
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};
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} // namespace base
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