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++ // Copyright (C) 2021 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "mandelbrotwidget.h"
++ #include "renderthread.h"
++
++ #include <QApplication>
++ #include <QCommandLineParser>
++ #include <QCommandLineOption>
++ #include <QDebug>
++
++ using namespace Qt::StringLiterals;
++
++ //! [0]
++ int main(int argc, char *argv[])
++ {
++ QApplication app(argc, argv);
++
++ QCommandLineParser parser;
++ parser.setApplicationDescription(u"Qt Mandelbrot Example"_s);
++ parser.addHelpOption();
++ parser.addVersionOption();
++ QCommandLineOption passesOption(u"passes"_s, u"Number of passes (1-8)"_s, u"passes"_s);
++ parser.addOption(passesOption);
++ parser.process(app);
++
++ if (parser.isSet(passesOption)) {
++ const auto passesStr = parser.value(passesOption);
++ bool ok;
++ const int passes = passesStr.toInt(&ok);
++ if (!ok || passes < 1 || passes > 8) {
++ qWarning() << "Invalid value:" << passesStr;
++ return -1;
++ }
++ RenderThread::setNumPasses(passes);
++ }
++
++ MandelbrotWidget widget;
++ widget.grabGesture(Qt::PinchGesture);
++ widget.show();
++ return app.exec();
++ }
++ //! [0]