
Fix [Add `CircularProgressIndicator` padding to match M3 specs](https://github.com/flutter/flutter/issues/159267) ### Code sample <details> <summary>expand to view the code sample</summary> ```dart import 'package:flutter/material.dart'; void main() => runApp(const MyApp()); class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, home: Scaffold( body: Center( child: Row( mainAxisAlignment: MainAxisAlignment.center, children: [ Container( width: 40, height: 40, color: Colors.red, alignment: Alignment.center, child: const Text( '40x40px', style: TextStyle(fontSize: 8, color: Colors.white), ), ), const ColoredBox( color: Colors.amber, child: CircularProgressIndicator( year2023: false, value: 0.4, ), ), Container( width: 48, height: 48, color: Colors.red, alignment: Alignment.center, child: const Text( '48x48px', style: TextStyle(fontSize: 10, color: Colors.white), ), ) ], ), ), ), ); } } ``` </details> ### Preview <img width="454" alt="Screenshot 2024-11-21 at 17 13 25" src="https://github.com/user-attachments/assets/6f7520f1-a213-4814-8116-6dd996639eec"> ### Specs  ## 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]. - [ ] 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
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
.