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fixes https://github.com/flutter/flutter/issues/115827 fixes https://github.com/flutter/flutter/issues/101325 ### Description 1. This PR adds a new MaterialState `color` property to all the chips (this makes it possible to customize chips in all states from the M3 specs). 2. Updated defaults to use the new MaterialState `color` property. 3. Updated and added new tests to all the chip test classes. <details> <summary>code sample</summary> ```dart import 'package:flutter/material.dart'; const Color disabledColor = Colors.black26; const Color backgroundColor = Colors.cyan; final Color disabledSelectedColor = Colors.red.shade100; const Color selectedColor = Colors.amber; final MaterialStateProperty<Color> color = MaterialStateProperty.resolveWith((Set<MaterialState> states) { if (states.contains(MaterialState.disabled) && states.contains(MaterialState.selected)) { return disabledSelectedColor; } if (states.contains(MaterialState.disabled)) { return disabledColor; } if (states.contains(MaterialState.selected)) { return selectedColor; } return backgroundColor; }); void main() => runApp(const MyApp()); class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, theme: ThemeData( useMaterial3: true, // chipTheme: ChipThemeData(color: color), ), home: const Example(), ); } } class Example extends StatefulWidget { const Example({super.key}); @override State<Example> createState() => _ExampleState(); } class _ExampleState extends State<Example> { bool enabled = false; bool selected = true; @override Widget build(BuildContext context) { const Widget verticalSpace = SizedBox(height: 20); return Scaffold( body: Center( child: Column( children: <Widget>[ const SizedBox(height: 25), Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: <Widget>[ const Card( elevation: 0.0, color: disabledColor, child: Padding( padding: EdgeInsets.all(8.0), child: Text('disabledColor'), ), ), const Card( elevation: 0.0, color: backgroundColor, child: Padding( padding: EdgeInsets.all(8.0), child: Text('backgroundColor'), ), ), Card( elevation: 0.0, color: disabledSelectedColor, child: const Padding( padding: EdgeInsets.all(8.0), child: Text('disabledSelectedColor'), ), ), const Card( elevation: 0.0, color: selectedColor, child: Padding( padding: EdgeInsets.all(8.0), child: Text('selectedColor'), ), ), ], ), const Spacer(), Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: <Widget>[ Column( mainAxisSize: MainAxisSize.min, mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ RawChip( selected: selected, selectedColor: selectedColor, color: color, label: const Text('RawChip'), isEnabled: enabled, onSelected: enabled ? (bool value) {} : null, ), verticalSpace, InputChip( isEnabled: enabled, selected: selected, selectedColor: selectedColor, color: color, label: const Text('InputChip'), onSelected: enabled ? (bool value) {} : null, ), ], ), Column( mainAxisSize: MainAxisSize.min, children: <Widget>[ FilterChip( selected: selected, selectedColor: selectedColor, color: color, label: const Text('FilterChip'), onSelected: enabled ? (bool value) {} : null, ), verticalSpace, FilterChip.elevated( selected: selected, selectedColor: selectedColor, color: color, label: const Text('FilterChip.elevated'), onSelected: enabled ? (bool value) {} : null, ), ], ), Column( mainAxisSize: MainAxisSize.min, children: <Widget>[ ChoiceChip( selected: selected, selectedColor: selectedColor, color: color, label: const Text('ChoiceChip'), onSelected: enabled ? (bool value) {} : null, ), verticalSpace, ChoiceChip.elevated( selected: selected, selectedColor: selectedColor, color: color, label: const Text('ChoiceChip.elevated'), onSelected: enabled ? (bool value) {} : null, ), ], ), ], ), const Spacer(), Row( children: <Widget>[ Flexible( child: SwitchListTile( title: const Text('Enabled'), value: enabled, onChanged: (bool value) { setState(() => enabled = value); }, ), ), Flexible( child: SwitchListTile( title: const Text('Selected'), value: selected, onChanged: (bool value) { setState(() => selected = value); }, ), ), ], ) ], ), ), ); } } ``` </details> ### Before (not possible to customize disabled and selected chips)  ### After (using disabled and selected chips using the new MaterialState `color` property)  |
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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.