tdesktop/Telegram/SourceFiles/core/single_timer.cpp

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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.
It 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.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "core/single_timer.h"
#include "application.h"
SingleTimer::SingleTimer(QObject *parent) : QTimer(parent) {
QTimer::setSingleShot(true);
Sandbox::connect(SIGNAL(adjustSingleTimers()), this, SLOT(adjust()));
}
void SingleTimer::setTimeoutHandler(base::lambda<void()> handler) {
if (_handler && !handler) {
disconnect(this, SIGNAL(timeout()), this, SLOT(onTimeout()));
} else if (handler && !_handler) {
connect(this, SIGNAL(timeout()), this, SLOT(onTimeout()));
}
_handler = std::move(handler);
}
void SingleTimer::adjust() {
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auto n = getms(true);
if (isActive()) {
if (n >= _finishing) {
start(0);
} else {
start(_finishing - n);
}
}
}
void SingleTimer::onTimeout() {
if (_handler) {
_handler();
}
}
void SingleTimer::start(int msec) {
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_finishing = getms(true) + (msec < 0 ? 0 : msec);
QTimer::start(msec);
}
void SingleTimer::startIfNotActive(int msec) {
if (isActive()) {
int remains = remainingTime();
if (remains > msec) {
start(msec);
} else if (!remains) {
start(1);
}
} else {
start(msec);
}
}