Painting QML + WebView in non-UI Thread

[lukasf]

We are using Quick to generate dynamic textures for a 3D scene (Qt-based UI + IrrlichtEngine-based 3D scene)
The QML files are rendered into a QImage and transferred to the Irrlicht Engine.
The images need to be updated once every x seconds.

Rendering these QML files should not slow down or block the main UI thread.
Therefore, a special QML painter thread was devised.

It worked very well - until we decided to add a WebView to one of the QML files.
The WebView wants to create QWidget-based objects (the context menu?).
However, QWidgets can only be created in the UI-Thread...

Is there a simple WebView without any QWidgets?