Deprecate component eventManager

[GavinJoyce]

Rendered

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Part of emberjs/ember.js#14754

[rwjblue]

Awesome, thank you for putting this together!

We should also have this deprecation cover the canDispatchToEventManager property of EventDispatcher (mostly because the option does nothing at that point and is misleading) so that when this lands defining an eventManager on any component or specifying canDispatchToEventManager trigger a deprecation.

[kellyselden]

I haven't used this feature before, but if I did, what would be the alternative to using it? (how do I un-deprecate my code)

[GavinJoyce]

@kellyselden you could extend EventDispatcher and implement the soon to be removed _findNearestEventManager in event handlers. I'm happy to create an addon for this if anyone requires it so that it's a simple opt-in.

[GavinJoyce]

if anyone has a need for this, let me know and I'll create the addon

[kellyselden]

@GavinJoyce Addon route seems like a good idea to me.

[rwjblue]

Sorry for the delay here. We discussed in the core team meeting on 2017-01-20, and are 👍 on moving this to final comment period.

[mixonic]

I'm merging this, as we are certainly past the one-week window and I see no new comments 😗

Thank you!