Selection tools from O3DVisualizer in custom gui?

[ezrogoodman]

Hi,

I would like to use the Selection tools (multiple point set and polygon selection) available in O3DVisualizer as a part of my own application based on python open3d gui and SceneWidget. All hints I could find was the "mouse-and-point-coord.py" example script which has a limited functionality and the C++ implementation of O3DVisualizer which however uses methods that are not callable from python.

Is there any more complex vertex-selection example I missed?
Does anyone have a solution in python they could share?
Is there a plan to add this functionality to the python gui class in future releases?

Thanks for any help!