Can I ask, why do you want to set QT_SCALE_FACTOR at all? Cheers, Tor Arne
On 15 Feb 2021, at 12:50, Anisha kaul <anisha.kaul.1...@gmail.com<mailto:anisha.kaul.1...@gmail.com>> wrote: Greetings, The problem is that qputenv does not work if written after the initialization of QGuiApplication. I want to calculate scale according to the information from QGuiApplication. How do I do it? The following code throws a segmentation fault. . . #include <QGuiApplication> #include <QQmlApplicationEngine> #include <QScreen> #include <QDebug> int main(int argc, char *argv[]) { qreal abc = QGuiApplication::primaryScreen()->physicalDotsPerInch(); qDebug() << "null " << abc; qputenv("QT_SCALE_FACTOR", "2"); QGuiApplication app(argc, argv); QQmlApplicationEngine engine; const QUrl url(QStringLiteral("qrc:/main.qml")); QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app, [url](QObject *obj, const QUrl &objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); engine.load(url); return app.exec(); } _______________________________________________ Interest mailing list Interest@qt-project.org<mailto:Interest@qt-project.org> https://lists.qt-project.org/listinfo/interest
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