deepRelatedTargets and touch.deepTargets

[hayatoito]

Title: [Shadow] investigate if there should be deepRelatedTargets and touch.deepTargets (bugzilla: 28560)

Migrated from: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28560

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comment: 0
comment_url: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28560#c0
Olli Pettay wrote on 2015-04-26 18:25:01 +0000.

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comment: 1
comment_url: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28560#c1
Hayato Ito wrote on 2015-04-27 01:30:58 +0000.

The motivation is that we can't use event.deepPath[0] in either case, isn't it?

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comment: 2
comment_url: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28560#c2
Anne wrote on 2015-04-27 03:06:02 +0000.

Yes, these properties are changed but their original values are not otherwise exposed.

(There might also be value in event.deepTarget as a clearer event.deepPath[0], just like event.target is short for a conceptual event.path[0]...)

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comment: 3
comment_url: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28560#c3
Anne wrote on 2015-04-27 11:25:19 +0000.

Also:

deepOffsetX/Y

[hayatoito]

I think it's easy to add deepRelatedTarget and so on. However, I'd like to see the actual use cases.
Let me defer this to v2. If someone has a use case, please update this issue. I'm okay to have this in v1.

[annevk]

What worries me a bit is that we have a weird mix with retargeting while also wanting event delegation. If you want actual event delegation, you want the original values for all these properties (also offset*).

[hayatoito]

Let me close this issue since there is lack of interest. Please feel free to reopen if you are interested in.

[annevk]

What I would like to know is how you can use deepPath without the corresponding deepRelatedTargets, etc. Perhaps the latter is only relevant for a subset of events, but it seems the model is inconsistent here.

[hayatoito]

I think deepPath is useful itself, without having deepRelatedTarget.
For consistency, we might want to have deepRelatedTarget, however, I have never heard a demand for that.
I'm okay to have deepRelatedTarget, but I thought we should add it when we hear a demand for that.

[hayatoito]

Let me keep this open. If someone has a use case for deepRelatedTarget, please let us know that.

[annevk]

Maybe it's just that we don't have many usage scenarios for relatedTarget?

[annevk]

I think you were right for closing this. The inconsistency still puzzles me, but that's not enough reason to keep this open. Apologies.