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50
51#include <QApplication>
52#include <QCommandLineParser>
53#include <QScreen>
54
55#include "mainwindow.h"
56
57//! [45]
58int main(int argc, char *argv[])
59{
60 QApplication app(argc, argv);
61 QCoreApplication::setApplicationName(MainWindow::tr(s: "Icons"));
62 QCoreApplication::setApplicationVersion(QT_VERSION_STR);
63 QCommandLineParser commandLineParser;
64 commandLineParser.setSingleDashWordOptionMode(QCommandLineParser::ParseAsLongOptions);
65 commandLineParser.addHelpOption();
66 commandLineParser.addVersionOption();
67 QCommandLineOption noHighDpiPixmapOption("no-highdpi-pixmaps",
68 "Disable High DPI image loading (Qt::AA_UseHighDpiPixmaps)");
69 commandLineParser.addOption(commandLineOption: noHighDpiPixmapOption);
70 commandLineParser.addPositionalArgument(name: MainWindow::tr(s: "[file]"), description: MainWindow::tr(s: "Icon file(s) to open."));
71 commandLineParser.process(arguments: QCoreApplication::arguments());
72
73 if (!commandLineParser.isSet(option: noHighDpiPixmapOption))
74 QCoreApplication::setAttribute(attribute: Qt::AA_UseHighDpiPixmaps);
75
76 MainWindow mainWin;
77 if (!commandLineParser.positionalArguments().isEmpty())
78 mainWin.loadImages(fileNames: commandLineParser.positionalArguments());
79
80 const QRect availableGeometry = mainWin.screen()->availableGeometry();
81 mainWin.resize(w: availableGeometry.width() / 2, h: availableGeometry.height() * 2 / 3);
82 mainWin.move(ax: (availableGeometry.width() - mainWin.width()) / 2, ay: (availableGeometry.height() - mainWin.height()) / 2);
83
84 mainWin.show();
85 return app.exec();
86}
87//! [45]
88

source code of qtbase/examples/widgets/widgets/icons/main.cpp