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Diffstat (limited to 'examples/qtconcurrent/progressdialog/main.cpp')
-rw-r--r-- | examples/qtconcurrent/progressdialog/main.cpp | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/examples/qtconcurrent/progressdialog/main.cpp b/examples/qtconcurrent/progressdialog/main.cpp deleted file mode 100644 index cf4fd7e456..0000000000 --- a/examples/qtconcurrent/progressdialog/main.cpp +++ /dev/null @@ -1,100 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 <QtWidgets> -#include <QtConcurrent> - -#include <functional> - -using namespace QtConcurrent; - -int main(int argc, char **argv) -{ - QApplication app(argc, argv); - - const int iterations = 20; - - // Prepare the list. - QList<int> list; - for (int i = 0; i < iterations; ++i) - list.append(i); - - // Create a progress dialog. - QProgressDialog dialog; - dialog.setLabelText(QString("Progressing using %1 thread(s)...").arg(QThread::idealThreadCount())); - - // Create a QFutureWatcher and connect signals and slots. - QFutureWatcher<void> futureWatcher; - QObject::connect(&futureWatcher, &QFutureWatcher<void>::finished, &dialog, &QProgressDialog::reset); - QObject::connect(&dialog, &QProgressDialog::canceled, &futureWatcher, &QFutureWatcher<void>::cancel); - QObject::connect(&futureWatcher, &QFutureWatcher<void>::progressRangeChanged, &dialog, &QProgressDialog::setRange); - QObject::connect(&futureWatcher, &QFutureWatcher<void>::progressValueChanged, &dialog, &QProgressDialog::setValue); - - // Our function to compute - std::function<void(int&)> 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(); - }; - - // Start the computation. - futureWatcher.setFuture(QtConcurrent::map(list, 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(); -} |