That seems to be a third-party library that claims to add Qt Widgets support to QML, but it's hard to see from those examples how exactly it works. It still seems to be using a QML-style layout framework. What I'm saying is I would want to have an app that is entirely Qt Widgets, with the same behavior as if I had written it in code, but using a declarative language to specify as much of that information as possible. (Also I'd want to be able use it from Python with PyQt/PySide, not just C++. :-)