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This PR is to make `BottomAppBarTheme` conform to Flutter Material's conventions for component themes: - Added a `BottomAppBarThemeData` class which defines overrides for the defaults for `BottomAppBar` properties. - Added `BottomAppBarTheme` constructor parameters: `BottomAppBarThemeData? data` and `Widget? child`. This is now the preferred way to configure a `BottomAppBarTheme`: ```dart BottomAppBarTheme( data: BottomAppBarThemeData( color: xxx, height: xxx, elevation: xxx, shape: xxx, ... ), child: const BottomAppBar() ) ``` These two properties are made nullable to not break existing apps which has customized `ThemeData.bottomAppBarTheme`. - Update `BottomAppBarTheme` to be an `InheritedWidget` subclass. - Changed the type of component theme defaults from `BottomAppBarTheme` to `BottomAppBarThemeData`. - Changed the `BottomAppBarTheme bottomAppBarTheme` property to `BottomAppBarThemeData bottomAppBarTheme` in `ThemeData` and `ThemeData.copyWith()`. This may cause breaking changes, a migration guide will be created on website repo. - Add new tests for `BottomAppBarThemeData` and update the existing `BottomAppBarTheme` tests. And also turn to `true` for `useMaterial3` (along with usages accordingly) at the common method `_withTheme()` since `useMaterial3` is true by default. - Addresses the "theme normalization" sub-project within #91772. ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md --------- Signed-off-by: huycozy <huy@nevercode.io> |
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