/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
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**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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****************************************************************************/

#include <QImage>
#include <QList>
#include <QThread>
#include <QDebug>
#include <QGuiApplication>
#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[])
{
    QGuiApplication 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);

    label->show();
    qDebug() << text;

    app.exec();
}

#endif