Using QML timeline in a C++ framework

[neosettler]

Hi,

Having quite a beefy C++ project. Starting from scratch would be last resort. New features like “Flow” layout and Timeline are quite attractive but unfortunately, never made it to the QT C++ framework. I’m wondering if it’s possible to leverage QML inside a C++ QApplication?

More specifically, how would someone go about “creating” a QML Timeline and use it in a C++ QMainWindow?

My guess is YES as I’ve seen this example but can’t really compile and test it on windows:

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
 
    QSurfaceFormat::setDefaultFormat(QQuick3D::idealSurfaceFormat());
    qputenv("QT_QUICK_CONTROLS_STYLE", "Basic");
 
    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
    if (engine.rootObjects().isEmpty())
        return -1;
 
    return app.exec();
}

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QSurfaceFormat::setDefaultFormat(QQuick3D::idealSurfaceFormat());
    qputenv("QT_QUICK_CONTROLS_STYLE", "Basic");

    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
    if (engine.rootObjects().isEmpty())
        return -1;

    return app.exec();
}

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[wysota]

You would need to create a widget that can display a QtQuick scene (QQuickView or QQuickWidget) and deploy a scene there and then expose appropriate bindings between the scene and the rest of your code using context properties in the QML engine.