[go_router] [shell_route] Add observers parameter

[angjelkom]

This PR adds observers parameter to the ShellRoute and passes that to the nested Navigator created by that same ShellRoute.

The need for this PR is because it fixes cases where a Hero animation doesn't work when used with nested navigation and it requires a HeroController to be used as an observer for that nested Navigator.

fixes flutter/flutter#112095

Pre-launch Checklist

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[flutter-dashboard]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!).

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[grimatoma]

LGTM

[chunhtai]

Hi @angjelkom , are you still planning to work on this pr?

[angjelkom]

Hi @angjelkom , are you still planning to work on this pr?

Apologize, yes I will add your suggested change over the weeekend. I've been busy with work.

[angjelkom]

@chunhtai I will need a bit more time, as merging the latest commits from the main branch caused my example to have weird side-effects where the Hero animation doesn't work when going to the next page but when going back it works in a buggy-weird way.

So until i solve that I can't commit the change for HeroControllerScope.

[chunhtai]

@angjelkom are still planning on coming back to this pr?

[angjelkom]

@chunhtai Sorry I am too busy at the moment with work, I will for sure complete it by the end of next week!

[angjelkom]

@chunhtai I can't complete the pull request until #115832 its fixed, its blocking me.

I could use a lower commit but still I would need to test it against the latest commit at the end and currently that's not possible because of the above issue.

[chunhtai]

@angjelkom I will take a look at the issue and try to resolve it asap

[ycherniavskyi]

@angjelkom, the issue you mentioned has been fixed. Could you update your PR for merging? If you are too busy, I could create an analogic PR. I need it solely for FirebaseAnalyticsObserver.

[angjelkom]

@ycherniavskyi yes saw the merge today, I will proceed with completing the PR

[angjelkom]

@ycherniavskyi the PR is ready waiting for @chunhtai to review it and approve it.

[arsen]

any chance this will get merged soon?

[angjelkom]

@arsen I will get on it tonight to finish it up.

[angjelkom]

@chunhtai as @ycherniavskyi suggested we should use the relevant HeroController based on whether MaterialApp or CupertinoApp is used, in order to do that we need to use the RouteBuilder not the ShellRoute in order to access the context.

The issue is because the RouteBuilder gets rebuild while navigating the HeroController which again breaks the animation, the way I see it we have two options:

Option 1:

Create 3 final variables in the RouteBuilder, one using createMaterialHeroController, one using createCupertinoHeroController and a default HeroController.
Then we can use those to pass the correct controller.
This way the controllers won't be rebuild and the animation would work. (tested)

Option 2:

Have a heroController parameter to the ShellRoute so that the user passes one himself.

Let me know what would you recommend, I can do the change tonight.

[ycherniavskyi]

As I understand, the last barrier before merging is extending the hero controller test. @chunhtai am I correct?

[chunhtai]

Sorry I just got back from vacation.

[chunhtai]

As I understand, the last barrier before merging is extending the hero controller test. @chunhtai am I correct?

correct

[kamami]

When will this be merged?

[chunhtai]

Hi @angjelkom, it looks like @flodaniel has provided a test, can you commit to this pr so that i can merge it?

[angjelkom]

@flodaniel Thanks a lot for the test! @chunhtai merged it, but at the moment submit-queue check is failing for some other reason.

[hannah-hyj]

LGTM

[lublot]

Hello everyone! Is there any prediction of when it will be merged?