Action items from first test with napari + bluesky-widgets at RSOXS

[danielballan]

Copied from my paper notes from our meeting on 29 January:

Basic follow-up

• Push up the changes we made to the example during our visit into the pull request Draft napari image gallery example. bluesky/bluesky-widgets#101.
• Test live-streaming scans from RE at our next meeting.

Actionable enhancements

These requires changes to bluesky-widgets core or to the specific example bluesky/bluesky-widgets#101.

• Use heuristics to automatically show the right column, rather than hard-coding one. Also, expose UI to select one manually.
• Perform dark subtraction with correct interpolation. We got close with this during the demo, but we need to refine the xarray code a bit to make it work as desired.
• Add the "Run metadata tree" widget to the example.
• Double-clicking a search result should have the same result as selecting it and clicking the button.
• Include secondary measurements associated with a given Image in the Layer's metadata attribute.
• Use the new custom search fields feature. (Which fields should we add, @EliotGann? If some were discussed I failed to write them down at the time.)

Enhancements that may require enhancement to napari itself

These come with two questions:

1. Can napari already do this?
2. If not, how much work would it be for us to add it to napari as PR?

I strongly suspect napari already has GH issues discussing these, so we should find them.

• Test annotation of the images
• Spiral layout (and non-gridded layouts generally)

Data plumbing tasks

• Sort out how to deal with remote access. X11 is problematic. The way forward here may be to rely on Databroker-as-a-service. Run napari locally, and fetch data chunk-wise over the network. [Update June 2021] Tiled and databroker 2.0.0-dev are the way!