# ThemeData's toggleableActiveColor property has been deprecated

> Material Widgets that use toggleableActiveColor property are migrated to use Material ColorScheme.




:::important
These breaking change docs are accurate, as of the release
under which they are published. Over time, the
workarounds described here might become inaccurate.
We don't, in general, keep these breaking change docs up
to date as of each release.

这些破坏性改动文档的准确性仅限于其发布时对应的版本。
随着时间的推移，文档中描述的方案可能会逐渐失效。
通常情况下，我们不会在每次发布新版本时都对这些文档进行同步更新。

The [breaking change index file](/release/breaking-changes)
lists the docs created for each release.

[破坏性改动列表](/release/breaking-changes) 
列出了每个版本的文档。

:::


## Summary

The Material widgets `Switch`, `SwitchListTile`, `Checkbox`,
`CheckboxListTile`, `Radio`, `RadioListTile` now use
`ColorScheme.secondary` color for their toggleable widget.
`ThemeData.toggleableActiveColor` is deprecated and will eventually be removed.

## Context

The migration of widgets that depend on `ThemeData.toggleableActiveColor`
to `ColorScheme.secondary` caused  the `toggleableActiveColor` property
to be unnecessary. This property will eventually be removed, as per Flutter's
[deprecation policy](/release/compatibility-policy#deprecation-policy).

## Description of change

The widgets using `ThemeData.toggleableActiveColor` color for the
active/selected state now use `ColorScheme.secondary`.

## Migration guide

Toggleable widgets' active/selected color can generally be customized in 3 ways:

1. Using ThemeData's `ColorScheme.secondary`.
2. Using components themes `SwitchThemeData`, `ListTileThemeData`,
   `CheckboxThemeData`, and `RadioThemeData`.
3. By customizing the widget's color properties.

Code before migration:

```dart
MaterialApp(
  theme: ThemeData(toggleableActiveColor: myColor),
  // ...
);
```

Code after migration:

```dart
final ThemeData theme = ThemeData();
MaterialApp(
  theme: theme.copyWith(
    switchTheme: SwitchThemeData(
      thumbColor: MaterialStateProperty.resolveWith<Color?>(
          (Set<MaterialState> states) {
        if (states.contains(MaterialState.disabled)) {
          return null;
        }
        if (states.contains(MaterialState.selected)) {
          return myColor;
        }
        return null;
      }),
      trackColor: MaterialStateProperty.resolveWith<Color?>(
          (Set<MaterialState> states) {
        if (states.contains(MaterialState.disabled)) {
          return null;
        }
        if (states.contains(MaterialState.selected)) {
          return myColor;
        }
        return null;
      }),
    ),
    radioTheme: RadioThemeData(
      fillColor: MaterialStateProperty.resolveWith<Color?>(
          (Set<MaterialState> states) {
        if (states.contains(MaterialState.disabled)) {
          return null;
        }
        if (states.contains(MaterialState.selected)) {
          return myColor;
        }
        return null;
      }),
    ),
    checkboxTheme: CheckboxThemeData(
      fillColor: MaterialStateProperty.resolveWith<Color?>(
          (Set<MaterialState> states) {
        if (states.contains(MaterialState.disabled)) {
          return null;
        }
        if (states.contains(MaterialState.selected)) {
          return myColor;
        }
        return null;
      }),
    ),
  ),
  //...
)
```

## Timeline

In stable release: 3.7

## References

API documentation:

* [`ThemeData.toggleableActiveColor`][]
* [`ColorScheme.secondary`][]

Relevant issues:

* [`Switch` widget color doesn't use `ColorScheme`][]

Relevant PRs:

* [Deprecate `toggleableActiveColor`][].

[`ThemeData.toggleableActiveColor`]: https://api.flutter-io.cn/flutter/material/ThemeData/toggleableActiveColor.html
[`ColorScheme.secondary`]: https://api.flutter-io.cn/flutter/material/ColorScheme/secondary.html
[`Switch` widget color doesn't use `ColorScheme`]: https://github.com/flutter/flutter/issues/93709
[Deprecate `toggleableActiveColor`]: https://github.com/flutter/flutter/pull/97972