Clementine-audio-player-Mac.../ext/libclementine-common/core/closure.cpp

73 lines
2.2 KiB
C++

/* This file is part of Clementine.
Copyright 2011, David Sansome <me@davidsansome.com>
Clementine 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.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "closure.h"
#include "core/timeconstants.h"
namespace _detail {
ClosureBase::ClosureBase(ObjectHelper* helper) : helper_(helper) {}
ClosureBase::~ClosureBase() {}
CallbackClosure::CallbackClosure(QObject* sender, const char* signal,
std::function<void()> callback)
: ClosureBase(new ObjectHelper(sender, signal, this)),
callback_(callback) {}
void CallbackClosure::Invoke() { callback_(); }
ObjectHelper* ClosureBase::helper() const { return helper_; }
ObjectHelper::ObjectHelper(QObject* sender, const char* signal,
ClosureBase* closure)
: closure_(closure) {
connection_ = connect(sender, signal, SLOT(Invoked()));
connect(sender, SIGNAL(destroyed()), SLOT(TearDown()));
}
void ObjectHelper::TearDown() {
// For the case that the receiver has been destroyed, disconnect the signal
// so that Invoke isn't called.
disconnect(connection_);
deleteLater();
}
void ObjectHelper::Invoked() {
closure_->Invoke();
deleteLater();
}
void Unpack(QList<QGenericArgument>*) {}
} // namespace _detail
_detail::ClosureBase* NewClosure(QObject* sender, const char* signal,
std::function<void()> callback) {
return new _detail::CallbackClosure(sender, signal, callback);
}
void DoAfter(QObject* receiver, const char* slot, int msec) {
QTimer::singleShot(msec, receiver, slot);
}
void DoInAMinuteOrSo(QObject* receiver, const char* slot) {
int msec = (60 + (qrand() % 60)) * kMsecPerSec;
DoAfter(receiver, slot, msec);
}