@devDawg

In memory, resources are represented by a tree of resource objects. The tree is automatically built at startup and used by QFile for resolving paths to resources. You can use a QDir initialized with ":/" to navigate through the resource tree from the root.

So, you could use:

QQmlComponent comp(&engine,QUrl("qrc:/Display0.qml")); QFile file(":/Display0.qml"); // acessing by resource tree

NOTE: QStringLiteral is a optimization case, you can use QStringLiteral to avoid the implicit conversion between char* to QString and then copy the data.

References:
Qt Resource Documentation - Using resource in the application
QStringLiteral Explanation

I got it to work with the following line:

obj->setProperty("parent", QVariant::fromValue<QObject*>(viewport));

now everything's fine, anyway.. am I doing everything correctly here?

It's strange that it's not documented

I have no idea on your issue, but I recall a method which is in Component type:
object incubateObject(Item parent, object properties, enumeration mode)

By noting "incubate" it means the object is created asynchronously, without blocking the GUI.