fix(Viewer): Expose picked values via click subscription

[scottwittenburg]

@thewtex There's no other subscription management functionality in the store, but I put this one there so we would have it available to any of our components, as well as making it available to embedding applications. Let me know if a cleaner approach comes to mind.

[oeway]

Nice! I am thinking that would a even more generic event bus make sense? The viewer can expose a standard EventEmitter interface(with functions including on, once, off, emit etc.), one can subscribe to many different events. Not only pick value, but also view change, camera position change etc.

[thewtex]

@scottwittenburg nice!

@oeway thanks for the suggestion!

@scottwittenburg could you please look into providing subscriptions and exposing the EventEmitter interface via the eventemitter2 package?

[scottwittenburg]

@scottwittenburg could you please look into providing subscriptions and exposing the EventEmitter interface via the eventemitter2 package?

Yes, will do. 👍

[thewtex]

I noticed eventemitter3 is available -- I am guessing it is better than eventemitter2 ;-).

https://www.npmjs.com/package/eventemitter3

[thewtex]

Required API's for Juptyer

• [ ] publicAPI.setLabelMap

[thewtex]

Superceded by #289