main.cpp 范例文件

/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** 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:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     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 The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDebug>
#include <QThread>
#include <QString>
#include <qtconcurrentrun.h>
#include <QApplication>
#ifndef QT_NO_CONCURRENT
using namespace QtConcurrent;
void hello(QString name)
{
    qDebug() << "Hello" << name << "from" << QThread::currentThread();
}
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    QFuture<void> f1 = run(hello, QString("Alice"));
    QFuture<void> f2 = run(hello, QString("Bob"));
    f1.waitForFinished();
    f2.waitForFinished();
}
#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