MRG: Reset the viz settings in _TimeViewer

[GuillaumeFavelier]

This PR reworks the interactor in _Brain when using flatmaps and adds a button to reset the initial time index and camera settings "Reset".

• Use vtkInteractorStyleRubberBand2D with parallel projection
• Find a suitable icon
• Build the qt icon resources
• Fix conflicts
• try/except or hasattr for "RubberBand2D"
• Check the MNE logo

It's an item of #7162
Related to #8082 (comment)

[larsoner]

Could we use a 2D interactor instead like

https://vtk.org/doc/nightly/html/classvtkInteractorStyleRubberBand2D.html

[GuillaumeFavelier]

Could we use a 2D interactor

Yes indeed! In my experiments it works assuming that the camera uses parallel projection :)

[GuillaumeFavelier]

These are the results for "restore" on material.io:

1	2	3	4	5

4 is already used for "Restore Scale". I put it in case we would swap for something else.

Alternatively:

cancel	flip	repeat

I searched "reset" and "init" without success.

[GuillaumeFavelier]

I prefer 1 personally.

Any opinion @agramfort , @larsoner, @hoechenberger, @drammock ?

[hoechenberger]

I think 1 could be a nice choice :)

[agramfort]

+1 for 1

[GuillaumeFavelier]

I'll go ahead with 1 then

[larsoner]

Can you open a PR to pyvista to add this as a mode? Then we can try/except or hasattr here

[larsoner]

(For example, this mode will suffer from the "click-and-drag-not-captured" bug, because the fix for this is in PyVista subclassing the VTK interactor style and dealing with button presses.)

[GuillaumeFavelier]

Can you open a PR to pyvista to add this as a mode?

Sure, will do.

I use middle-click to drag with this one. I was not aware of this bug.

[larsoner]

pyvista/pyvista#116

[larsoner]

(It's possible we also need to capture middle clicks, in which case hopefully from pyvista/pyvista#854 it's clear what you'd need to do to capture those, too)

[GuillaumeFavelier]

@larsoner I opened pyvista/pyvista#872

Also, could you check the that mne logo is exactly like you want? I had the following message while building it:

findfont: Font family ['sans-serif'] not found. Falling back to DejaVu Sans.

Maybe that was not a good idea but I tried multiple packages for my linux distribution without any success.

[larsoner]

Also, could you check the that mne logo is exactly like you want? I had the following message while building it:

The MNE logo in the resources is a PNG. I'm not sure why this would happen.

But FWIW you can get the Primetime font listed in the logo generation script for free here

[GuillaumeFavelier]

The MNE logo in the resources is a PNG. I'm not sure why this would happen.

The logo is not tracked in mne/icons like the other icons and I built the Qt resources to integrate the new "Reset" icon. To fix the conflicts, I had to regenerate the resources. That's why I wanted to check that everything is okay.

[larsoner]

But you shouldn't have gotten any font warning from running the icon resource generation from the mne logo because it's not a vector format, but rather bitmap. Did you also need to run something from logo/? Or did you just run the icons/ script? Can you got bisect to verify it's coming from the logo commit?

[larsoner]

On a system without the Primetime font, I can reproduce with:

$ cd mne/logo
$ python generate_mne_logos.py 
findfont: Font family ['sans-serif'] not found. Falling back to DejaVu Sans.

But you should not have needed to call generate_mne_logos.py unless you were changing the logo. You should just be able to do:

$ cd ../mne/icons
$ python resources.py

which does not emit any warning.

... but then I realized that the logo actually was not saved as part of the git repo! So now I see why you had to do all of this. I'll push a commit that adds the PNG so that people don't have to do it in the future, and also regenerate the resources.

[larsoner]

Works great for me

[larsoner]

Thanks @GuillaumeFavelier