main.cpp Example File

qtconcurrent/map/main.cpp
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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

 #include <QLabel>

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QString text("Qt Concurrent is not yet supported on this platform");

     QLabel *label = new QLabel(text);
     label->setWordWrap(true);

 #if defined(Q_WS_S60) || defined(Q_WS_MAEMO_5)
     label->showMaximized();
 #else
     label->show();
 #endif
     qDebug() << text;

     app.exec();
 }

 #endif