Support LabeledEvents

[magland]

See #89 (comment)

[magland]

From Cody:

I'd say a general strategy for this would be a raster whose number of 'units' (columns or Y axis) is the number of unique labels

[magland]

Example:

@tuanpham96 @CodyCBakerPhD

I have a basic raster plot for LabeledEvents. (One issue is that in this case the unit label gets cutoff in the margin)

https://flatironinstitute.github.io/neurosift/?p=/nwb&url=https://dandiarchive.s3.amazonaws.com/blobs/80d/c44/80dc4460-7652-4b88-97ce-69a7e8be5d60&tab=neurodata-item:/processing/behavior/RewardEventsLinearTrack|LabeledEvents

[CodyCBakerPhD]

One idea on how to display the labels better could be to color each each one and have a separate legend on the side for matching color to string label, which should get give plenty of room for longer label names

I was going to suggest that initially instead of splitting each unique label over the Y axis, but it occurred to me that it's possible to have a fairly large number of labels (as with MoSeq, which will likely be one of the more common instances of this data structure once the extension gains popularity) so I didn't want distinct consecutive event times from similarly colored (but different) labels to cause confusion - so even with coloration I still think utilization of the Y axis is the way to go

Only other issue I found with this viewer is that by default it starts with the time range zoomed out to the max - that's fine when just viewing it in an isolated tab but when displaying against another series (neural or in this case video/pose) it either takes a long time or stalls out on the other tabs

https://flatironinstitute.github.io/neurosift/?p=/nwb&url=https://dandiarchive.s3.amazonaws.com/blobs/80d/c44/80dc4460-7652-4b88-97ce-69a7e8be5d60&tab=neurodata-items:neurodata-item:/processing/behavior/RewardEventsLinearTrack|LabeledEvents@neurodata-item:/processing/behavior/LinearMazePositionTracking/SpatialSeriesRaw|SpatialSeries@view:X/Y|/processing/behavior/LinearMazePositionTracking/SpatialSeriesRaw

[magland]

@CodyCBakerPhD thanks for those suggestions. At this point, I don't know a good solution to displaying the long labels on the raster plot. One consideration is that we want the time axes to line up properly between widgets in the multi-view mode. That means we can't easily make additional room for long labels or a legend. I am going to open a new issue for this one, and we can think about what to do.

I also don't know how to solve the issue with the initial visible time range. The problem is that different widgets have different rules for how much to display on start-up, and so when there are multiple views, there is a race condition controlling which one wins out. I will open a separate issue for that as well.

So with those two separate issues, I am going to close this. Feel free to reopen if there are other items to discuss.