Simple Example of 3d Cube inside SceneGraph needed

I was wondering if anyone could forward a link and/or a 3d OpenGL example using a custom QtQuick component that might render something simple like a cube. I am hoping to use native OpenGL to render a 3d opengl object in the background (and not Qt3d since it is under heavy development) and QtQuick components in the foreground. I am aware of the “OpenGL under QML” example, but that example unfortunately does not seem to make it clear how to render 3d perspective lines. I would greatly appreciate any help this! Best regards, Steve