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Diffstat (limited to 'src/corelib/concurrent/qfuturewatcher.h')
| -rw-r--r-- | src/corelib/concurrent/qfuturewatcher.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/corelib/concurrent/qfuturewatcher.h b/src/corelib/concurrent/qfuturewatcher.h new file mode 100644 index 0000000000..5fe2007a01 --- /dev/null +++ b/src/corelib/concurrent/qfuturewatcher.h @@ -0,0 +1,222 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** 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 |