main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQuickStyle>
#include <QQuickWindow>
#include <QTimer>
#include <QImage>

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
    QGuiApplication app(argc, argv);

    // The style is selected by :/qtquickcontrols2.conf, which Qt Quick Controls
    // reads on its own. Basic is the fallback, so any control the D707 style
    // does not define still renders instead of disappearing.
    QQuickStyle::setFallbackStyle(QStringLiteral("Basic"));

    QQmlApplicationEngine engine;
    // the D707 style is a QML module living in the resource system
    engine.addImportPath(QStringLiteral("qrc:/"));
    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);

    const QByteArray shot = qgetenv("IFI_SHOT");
    if (!shot.isEmpty() && !engine.rootObjects().isEmpty()) {
        auto *w = qobject_cast<QQuickWindow *>(engine.rootObjects().first());
        if (w) {
            QTimer::singleShot(1200, w, [w, shot]() {
                QImage img = w->grabWindow();
                img.save(QString::fromUtf8(shot));
                QCoreApplication::quit();
            });
        }
    }

    return app.exec();
}