494b08b420
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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Token Defaults Generator
Script that generates component theme data defaults based on token data.
Usage
Run this program from the root of the git repository:
dart dev/tools/gen_defaults/bin/gen_defaults.dart [-v]
This updates generated/used_tokens.csv and the various component theme files.
Templates
There is a template file for every component that needs defaults from
the token database. These templates are implemented as subclasses of
TokenTemplate. This base class provides some utilities and a structure
for adding a new block of generated code to the bottom of a given file.
Templates need to override the generate method to provide the generated
code block as a string.
See lib/fab_template.dart for an example that generates defaults for the
Floating Action Button.
Tokens
Tokens are stored in JSON files in data/, and are sourced from
an internal Google database.
template.dart should provide nearly all useful token resolvers
(e.g. color, shape, etc.). For special cases in which one shouldn't
be defined, use getToken to get the raw token value. The script, through
the various revolvers and getToken, validates tokens, keeps track of
which tokens are used, and generates generated/used_tokens.csv.