Question about Selection include usage

[kolmakova]

Hi! Noticed a new include option for Selection in the update v0.11, and I have a question about how it works.

I'm using Mosaic Core with the Selection.crossfilter. I have several custom interactive components that publish clauses into this selection. I want to have the ability to disable crossfiltering for some components but still include them in the Selection (have ability to enable it later). Specifically, interactions that are not crossfiltered should return results unaffected by the current clauses from other components.

What is the correct way to exclude a component from Selection crossfiltering? Should I create a Selection.single for each interactive component and use include to include them in the Selection.crossfilter only when I want to crossfilter those components? Is it possible to update include without recreating Selection?

[jheer]

If possible, an ideal setup is to (1) first define selections at the finest granularity you need, (2) create downstream selections that use include to incorporate clauses from those upstream selections.

However, if you want to dynamically change inclusion/exclusion of clauses within a selection, you'll need to go beyond this setup that Mosaic expects. While not currently part of the "official" selection API, you can change the inclusion relays in JavaScript. A basic selection (step 1 above) "relays" clauses to those that include it (step 2 above). These downstream selections are stored within the upstream selection's Selection._relay property, which is of type Set<Selection>. You can (at your own risk) try modifying this by adding/removing downstream selections to target. However, at the same time you'll need to make sure any existing clauses that have been already been relayed to downstream selections are also removed.

[kolmakova]

Thank you for the detailed explanation. I'll try implementing the approach you suggested. Really appreciate you taking the time to explain both the recommended pattern and the advanced option.

Mosaic is awesome! Wishing the team great success with its development! ☺️