Overlay widgets on a 3D Scene (Rviz)
I am trying to overlay some widgets on a render_panel from librviz. Librviz is using ogre and the panel has its own visualization manager.
When I try to overlay something transparent on it (both the rviz scene and the overlay are children of a main, container widget), I get black pixels instead of the panel behind, also, a property animation on opacity won't work.
When I try to put the overlay in a QGraphicsView, the "transparent" (previously black) parts become white and the PropertyAnimayion works too. Not so sure about the first method with QWidgets, I feel like I am doing something wrong with the QGraphisView and it could work.
I also read someone using QWidget::render() and a shared bitmap but I have no clue how he did it: https://forum.qt.io/topic/25707/using-qwindowsurface-for-a-heads-up-display