TST: Prototype of notebook viz (panel)

[GuillaumeFavelier]

This PR implements a prototype of integration of the pyvista backend in the jupyter notebook.

Animation:

Static images:

Note: requires the panel package

[larsoner]

Awesome!

Does it work with a multi-view scene, e.g. stc.plot(hemi='split', views=['lat', 'med'])? If not, is it possible in the future or would it be a nightmare or technically impossible to implement?

[GuillaumeFavelier]

Unfortunately, it's disabled for now. The output will just be the output image. Multi-view will be challenging to add I think so I can't say for now but I don't exclude it since viewport management is normally supported in vtk.js.

[codecov]

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[agramfort]

will this break outside of notebook?

[GuillaumeFavelier]

Oh my! You're right. I will fix this

[GuillaumeFavelier]

panel 0.7 is out with some enhancements. I'll update the renderings accordingly after testing more.

[GuillaumeFavelier]

This panel example demonstrates multi-view with linked views @larsoner

[larsoner]

Awesome!

[akaszynski]

@GuillaumeFavelier, this is perfect. Nice work! I'd like to have multiple plotting backends supported for pyvista as they each carry their own advantages, and some don't work on certain platforms (i.e. itk doesn't work on iOS).

Perhaps adding a backend kwarg to the plot and show methods? That way we can open it up to multiple plotting backends and leave panel as default.

[GuillaumeFavelier]

Although I agree no backend is perfect, the cost of maintaining this multi-backend architecture plus ensuring the same standard of quality for all of them can be huge in my opinion. I would recommend to stick with the backend with the best coverage of the needed features and then work hard to fill the gap.

[jona-sassenhagen]

The GIF looks great.

[GuillaumeFavelier]

Closing now since we got #7758 working