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main.cpp Example File
qtconcurrent/map/main.cpp

 /****************************************************************************
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 ** Copyright (C) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
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 ** This file is part of the documentation of the Qt Toolkit.
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 ** contact [email protected] if any conditions of this licensing
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 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 #include <QImage>
 #include <QList>
 #include <QThread>
 #include <QDebug>
 #include <QApplication>
 #include <qtconcurrentmap.h>

 #ifndef QT_NO_CONCURRENT

 QImage scale(const QImage &image)
 {
     qDebug() << "Scaling image in thread" << QThread::currentThread();
     return image.scaled(QSize(100, 100), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
 }

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     const int imageCount = 20;

     // Create a list containing imageCount images.
     QList<QImage> images;
     for (int i = 0; i < imageCount; ++i)
         images.append(QImage(1600, 1200, QImage::Format_ARGB32_Premultiplied));

     // Use QtConcurrentBlocking::mapped to apply the scale function to all the
     // images in the list.
     QList<QImage> thumbnails = QtConcurrent::blockingMapped(images, scale);

     return 0;
 }

 #else

 int main()
 {
         qDebug() << "Qt Concurrent is not yet supported on this platform";
 }

 #endif