Well, thank you for the response and for the idea about creation and
deletion of objects. I tried it and it worked.
I am feeling though that it is not a good way of writing code.
Am I trying to solve a wrong problem?
My aim is to run this application on screens of different PPI. So, I
thought that I can get the PPI and set the scale accordingly.
Any other suggestions about some proper way to solve this?
On Mon, Feb 15, 2021 at 5:54 PM Tor Arne Vestbø <tor.arne.ves...@qt.io>
wrote:
> 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> 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();
> }
>
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