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Diffstat (limited to 'qtinterface/qt4/Qt/qtconcurrentmedian.h')
-rw-r--r-- | qtinterface/qt4/Qt/qtconcurrentmedian.h | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/qtinterface/qt4/Qt/qtconcurrentmedian.h b/qtinterface/qt4/Qt/qtconcurrentmedian.h deleted file mode 100644 index 54a87fa..0000000 --- a/qtinterface/qt4/Qt/qtconcurrentmedian.h +++ /dev/null @@ -1,130 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation ([email protected]) -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial Usage -** Licensees holding valid Qt Commercial licenses may use this file in -** accordance with the Qt Commercial License Agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and Nokia. -** -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. -** -** If you have questions regarding the use of this file, please contact -** Nokia at [email protected]. -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef QTCONCURRENT_MEDIAN_H -#define QTCONCURRENT_MEDIAN_H - -#include <QtCore/qglobal.h> - -#ifndef QT_NO_CONCURRENT - -#include <QtCore/qvector.h> -#include <QtCore/qalgorithms.h> - -QT_BEGIN_HEADER -QT_BEGIN_NAMESPACE - -QT_MODULE(Core) - -#ifndef qdoc - -namespace QtConcurrent { - -template <typename T> -class Median -{ -public: - Median(int _bufferSize) - : currentMedian(), bufferSize(_bufferSize), currentIndex(0), valid(false), dirty(true) - { - values.resize(bufferSize); - } - - void reset() - { - values.fill(0); - currentIndex = 0; - valid = false; - dirty = true; - } - - void addValue(T value) - { - currentIndex = ((currentIndex + 1) % bufferSize); - if (valid == false && currentIndex % bufferSize == 0) - valid = true; - - // Only update the cached median value when we have to, that - // is when the new value is on then other side of the median - // compared to the current value at the index. - const T currentIndexValue = values[currentIndex]; - if ((currentIndexValue > currentMedian && currentMedian > value) - || (currentMedian > currentIndexValue && value > currentMedian)) { - dirty = true; - } - - values[currentIndex] = value; - } - - bool isMedianValid() const - { - return valid; - } - - T median() - { - if (dirty) { - dirty = false; - QVector<T> sorted = values; - qSort(sorted); - currentMedian = sorted.at(bufferSize / 2 + 1); - } - return currentMedian; - } -private: - QVector<T> values; - T currentMedian; - int bufferSize; - int currentIndex; - bool valid; - bool dirty; -}; - -} // namespace QtConcurrent - -#endif //qdoc - -QT_END_NAMESPACE -QT_END_HEADER - -#endif // QT_NO_CONCURRENT - -#endif |