diff options
Diffstat (limited to 'examples/qtconcurrent/progressdialog')
| -rw-r--r-- | examples/qtconcurrent/progressdialog/main.cpp | 100 | ||||
| -rw-r--r-- | examples/qtconcurrent/progressdialog/progressdialog.pro | 14 |
2 files changed, 114 insertions, 0 deletions
diff --git a/examples/qtconcurrent/progressdialog/main.cpp b/examples/qtconcurrent/progressdialog/main.cpp new file mode 100644 index 0000000..249fbc1 --- /dev/null +++ b/examples/qtconcurrent/progressdialog/main.cpp @@ -0,0 +1,100 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#ifndef QT_NO_CONCURRENT + +using namespace QtConcurrent; + +const int iterations = 20; + +void spin(int &iteration) +{ + const int work = 1000 * 1000 * 40; + volatile int v = 0; + for (int j = 0; j < work; ++j) + ++v; + + qDebug() << "iteration" << iteration << "in thread" << QThread::currentThreadId(); +} + +int main(int argc, char **argv) +{ + QApplication app(argc, argv); + + // Prepare the vector. + QVector<int> vector; + for (int i = 0; i < iterations; ++i) + vector.append(i); + + // Create a progress dialog. + QProgressDialog dialog; + dialog.setLabelText(QString("Progressing using %1 thread(s)...").arg(QThread::idealThreadCount())); + + // Create a QFutureWatcher and conncect signals and slots. + QFutureWatcher<void> futureWatcher; + QObject::connect(&futureWatcher, SIGNAL(finished()), &dialog, SLOT(reset())); + QObject::connect(&dialog, SIGNAL(canceled()), &futureWatcher, SLOT(cancel())); + QObject::connect(&futureWatcher, SIGNAL(progressRangeChanged(int, int)), &dialog, SLOT(setRange(int, int))); + QObject::connect(&futureWatcher, SIGNAL(progressValueChanged(int)), &dialog, SLOT(setValue(int))); + + // Start the computation. + futureWatcher.setFuture(QtConcurrent::map(vector, spin)); + + // Display the dialog and start the event loop. + dialog.exec(); + + futureWatcher.waitForFinished(); + + // Query the future to check if was canceled. + qDebug() << "Canceled?" << futureWatcher.future().isCanceled(); +} + +#else + +int main() +{ + qDebug() << "Qt Concurrent is not yet supported on this platform"; +} + +#endif + diff --git a/examples/qtconcurrent/progressdialog/progressdialog.pro b/examples/qtconcurrent/progressdialog/progressdialog.pro new file mode 100644 index 0000000..12ba0bf --- /dev/null +++ b/examples/qtconcurrent/progressdialog/progressdialog.pro @@ -0,0 +1,14 @@ +TEMPLATE = app +TARGET += +DEPENDPATH += . +INCLUDEPATH += . + +# Input +SOURCES += main.cpp +CONFIG += console + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/qtconcurrent/progressdialog +sources.files = $$SOURCES $$HEADERS $$FORMS $$RESOURCES *.pro *.png +sources.path = $$[QT_INSTALL_EXAMPLES]/qtconcurrent/progressdialog +INSTALLS += target sources |