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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFUTUREWATCHER_H
#define QFUTUREWATCHER_H
#include <QtCore/qfuture.h>
#ifndef QT_NO_QFUTURE
#include <QtCore/qobject.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
class QEvent;
class QFutureWatcherBasePrivate;
class Q_CORE_EXPORT QFutureWatcherBase : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QFutureWatcherBase)
public:
QFutureWatcherBase(QObject *parent = 0);
int progressValue() const;
int progressMinimum() const;
int progressMaximum() const;
QString progressText() const;
bool isStarted() const;
bool isFinished() const;
bool isRunning() const;
bool isCanceled() const;
bool isPaused() const;
void waitForFinished();
void setPendingResultsLimit(int limit);
bool event(QEvent *event);
Q_SIGNALS:
void started();
void finished();
void canceled();
void paused();
void resumed();
void resultReadyAt(int resultIndex);
void resultsReadyAt(int beginIndex, int endIndex);
void progressRangeChanged(int minimum, int maximum);
void progressValueChanged(int progressValue);
void progressTextChanged(const QString &progressText);
public Q_SLOTS:
void cancel();
void setPaused(bool paused);
void pause();
void resume();
void togglePaused();
protected:
void connectNotify (const char * signal);
void disconnectNotify (const char * signal);
// called from setFuture() implemented in template sub-classes
void connectOutputInterface();
void disconnectOutputInterface(bool pendingAssignment = false);
private:
// implemented in the template sub-classes
virtual const QFutureInterfaceBase &futureInterface() const = 0;
virtual QFutureInterfaceBase &futureInterface() = 0;
};
template <typename T>
class QFutureWatcher : public QFutureWatcherBase
{
public:
QFutureWatcher(QObject *_parent = 0)
: QFutureWatcherBase(_parent)
{ }
~QFutureWatcher()
{ disconnectOutputInterface(); }
void setFuture(const QFuture<T> &future);
QFuture<T> future() const
{ return m_future; }
T result() const { return m_future.result(); }
T resultAt(int index) const { return m_future.resultAt(index); }
#ifdef qdoc
int progressValue() const;
int progressMinimum() const;
int progressMaximum() const;
QString progressText() const;
bool isStarted() const;
bool isFinished() const;
bool isRunning() const;
bool isCanceled() const;
bool isPaused() const;
void waitForFinished();
void setPendingResultsLimit(int limit);
Q_SIGNALS:
void started();
void finished();
void canceled();
void paused();
void resumed();
void resultReadyAt(int resultIndex);
void resultsReadyAt(int beginIndex, int endIndex);
void progressRangeChanged(int minimum, int maximum);
void progressValueChanged(int progressValue);
void progressTextChanged(const QString &progressText);
public Q_SLOTS:
void cancel();
void setPaused(bool paused);
void pause();
void resume();
void togglePaused();
#endif
private:
QFuture<T> m_future;
const QFutureInterfaceBase &futureInterface() const { return m_future.d; }
QFutureInterfaceBase &futureInterface() { return m_future.d; }
};
template <typename T>
Q_INLINE_TEMPLATE void QFutureWatcher<T>::setFuture(const QFuture<T> &_future)
{
if (_future == m_future)
return;
disconnectOutputInterface(true);
m_future = _future;
connectOutputInterface();
}
template <>
class QFutureWatcher<void> : public QFutureWatcherBase
{
public:
QFutureWatcher(QObject *_parent = 0)
: QFutureWatcherBase(_parent)
{ }
~QFutureWatcher()
{ disconnectOutputInterface(); }
void setFuture(const QFuture<void> &future);
QFuture<void> future() const
{ return m_future; }
private:
QFuture<void> m_future;
const QFutureInterfaceBase &futureInterface() const { return m_future.d; }
QFutureInterfaceBase &futureInterface() { return m_future.d; }
};
Q_INLINE_TEMPLATE void QFutureWatcher<void>::setFuture(const QFuture<void> &_future)
{
if (_future == m_future)
return;
disconnectOutputInterface(true);
m_future = _future;
connectOutputInterface();
}
QT_END_NAMESPACE
QT_END_HEADER
#endif // QT_NO_CONCURRENT
#endif // QFUTUREWATCHER_H
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