forked from qt-creator/qt-creator
It causes a conflict with the new QtConcurrent library of Qt 5 and is quite small. Change-Id: Ib97ab6daf8f67a88300cf03f044ba3593a4cd270 Reviewed-by: Eike Ziller <eike.ziller@nokia.com>
200 lines
6.1 KiB
C++
200 lines
6.1 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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**
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** GNU Lesser General Public License Usage
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**
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** Other Usage
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**
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**************************************************************************/
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#ifndef MULTITASK_H
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#define MULTITASK_H
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#include "utils_global.h"
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#include "runextensions.h"
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#include <QtCore/QObject>
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#include <QtCore/QList>
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#include <QtCore/QEventLoop>
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#include <QtCore/QFutureWatcher>
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#include <QtCore/QtConcurrentRun>
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#include <QtCore/QThreadPool>
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#include <QtDebug>
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QT_BEGIN_NAMESPACE
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namespace QtConcurrent {
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class QTCREATOR_UTILS_EXPORT MultiTaskBase : public QObject, public QRunnable
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{
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Q_OBJECT
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protected slots:
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virtual void cancelSelf() = 0;
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virtual void setFinished() = 0;
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virtual void setProgressRange(int min, int max) = 0;
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virtual void setProgressValue(int value) = 0;
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virtual void setProgressText(QString value) = 0;
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};
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template <typename Class, typename R>
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class MultiTask : public MultiTaskBase
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{
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public:
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MultiTask(void (Class::*fn)(QFutureInterface<R> &), const QList<Class *> &objects)
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: fn(fn),
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objects(objects)
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{
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maxProgress = 100*objects.size();
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}
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QFuture<R> future()
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{
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futureInterface.reportStarted();
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return futureInterface.future();
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}
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void run()
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{
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QThreadPool::globalInstance()->releaseThread();
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futureInterface.setProgressRange(0, maxProgress);
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foreach (Class *object, objects) {
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QFutureWatcher<R> *watcher = new QFutureWatcher<R>();
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watchers.insert(object, watcher);
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finished.insert(watcher, false);
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connect(watcher, SIGNAL(finished()), this, SLOT(setFinished()));
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connect(watcher, SIGNAL(progressRangeChanged(int,int)), this, SLOT(setProgressRange(int,int)));
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connect(watcher, SIGNAL(progressValueChanged(int)), this, SLOT(setProgressValue(int)));
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connect(watcher, SIGNAL(progressTextChanged(QString)), this, SLOT(setProgressText(QString)));
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watcher->setFuture(QtConcurrent::run(fn, object));
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}
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selfWatcher = new QFutureWatcher<R>();
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connect(selfWatcher, SIGNAL(canceled()), this, SLOT(cancelSelf()));
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selfWatcher->setFuture(futureInterface.future());
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loop = new QEventLoop;
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loop->exec();
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futureInterface.reportFinished();
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QThreadPool::globalInstance()->reserveThread();
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qDeleteAll(watchers);
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delete selfWatcher;
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delete loop;
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}
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protected:
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void cancelSelf()
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{
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foreach (QFutureWatcher<R> *watcher, watchers)
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watcher->future().cancel();
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}
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void setFinished()
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{
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updateProgress();
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QFutureWatcher<R> *watcher = static_cast<QFutureWatcher<R> *>(sender());
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if (finished.contains(watcher))
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finished[watcher] = true;
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bool allFinished = true;
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foreach (bool isFinished, finished) {
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if (!isFinished) {
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allFinished = false;
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break;
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}
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}
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if (allFinished)
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loop->quit();
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}
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void setProgressRange(int min, int max)
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{
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Q_UNUSED(min)
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Q_UNUSED(max)
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updateProgress();
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}
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void setProgressValue(int value)
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{
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Q_UNUSED(value)
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updateProgress();
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}
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void setProgressText(QString value)
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{
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Q_UNUSED(value)
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updateProgressText();
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}
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private:
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void updateProgress()
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{
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int progressSum = 0;
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foreach (QFutureWatcher<R> *watcher, watchers) {
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if (watcher->progressMinimum() == watcher->progressMaximum()) {
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if (watcher->future().isFinished() && !watcher->future().isCanceled())
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progressSum += 100;
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} else {
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progressSum += 100*(watcher->progressValue()-watcher->progressMinimum())/(watcher->progressMaximum()-watcher->progressMinimum());
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}
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}
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futureInterface.setProgressValue(progressSum);
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}
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void updateProgressText()
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{
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QString text;
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foreach (QFutureWatcher<R> *watcher, watchers) {
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if (!watcher->progressText().isEmpty()) {
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text += watcher->progressText();
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text += QLatin1Char('\n');
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}
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}
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text = text.trimmed();
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futureInterface.setProgressValueAndText(futureInterface.progressValue(), text);
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}
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QFutureInterface<R> futureInterface;
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void (Class::*fn)(QFutureInterface<R> &);
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QList<Class *> objects;
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QFutureWatcher<R> *selfWatcher;
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QMap<Class *, QFutureWatcher<R> *> watchers;
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QMap<QFutureWatcher<R> *, bool> finished;
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QEventLoop *loop;
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int maxProgress;
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};
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template <typename Class, typename T>
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QFuture<T> run(void (Class::*fn)(QFutureInterface<T> &), const QList<Class *> &objects, int priority = 0)
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{
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MultiTask<Class, T> *task = new MultiTask<Class, T>(fn, objects);
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QFuture<T> future = task->future();
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QThreadPool::globalInstance()->start(task, priority);
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return future;
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}
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} // namespace QtConcurrent
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QT_END_NAMESPACE
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#endif // MULTITASK_H
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