commit a9d377da228a250a4b401ea0683eb882b997297c
author Jamie Kerber <kerber.jg@gmail.com> Mon Aug 12 21:26:39 2024 +0200
committer dart-internal-monorepo <dart-internal-monorepo@dart-ci-internal.iam.gserviceaccount.com> Mon Aug 12 12:33:41 2024 -0700
tree f3087df935114f68565de650535fe7268d717124
parent d4700efaa8de920f774002499e611d5560441696

Implemented CupertinoButton new styles/sizes (fixes #92525) (#152845)

This PR fixes #92525 and introduces the following changes according to [latest iOS HIG](https://developer.apple.com/design/human-interface-guidelines/buttons#iOS-iPadOS):

- `CupertinoButton` now has a `size` property (type `enum CupertinoButtonSize`, values sm/md/lg, default `lg`) that allows the devs to apply new iOS 15+ button styles
- Previously `CupertinoButton` had a larger padding when no background color was specified. With the new HIG, that is no longer the case
- `CupertinoButton` now has a `.tinted` constructor that renders a translucent background (transparency % is brightness-dependent) and uses a different foreground color compared to `.filled`
- `CupertinoButton` now uses the `actionTextStyle` TextStyle from the given theme
- `CupertinoButton`'s child IconTheme's size will always be x1.2 the given TextStyle's size
- `CupertinoTextThemeData` now has a `actionSmallTextStyle` property to use with small buttons (including a default `_kDefaultActionSmallTextStyle` TextStyle)

Preview & example:

![image](https://github.com/user-attachments/assets/0985eb19-c091-41f5-bd98-0de196b7e403)

> **NOTE**: there is a discrepancy in dark mode button foreground color between the default CupertinoTheme and the HIG. A separate issue will be opened for this.

~EDIT: issue reported here https://github.com/flutter/flutter/issues/152846~
EDIT2: fixed by #153039 !

![image](https://github.com/user-attachments/assets/d671d7b4-bb2f-4b38-9464-ee1b04927304)

## Example
```dart
import 'package:flutter/cupertino.dart';

const Widget body = Row(
  mainAxisSize: MainAxisSize.min,
  mainAxisAlignment: MainAxisAlignment.center,
  children: <Widget>[
    Icon(
      CupertinoIcons.play_fill,
    ),
    Text("Play"),
  ],
);

void main() =>
  runApp(
    CupertinoApp(
      home: Container(
        child: Wrap(
        direction: Axis.horizontal,
        children: <Widget>[
          // header
          Text(''),
          Text('Plain'),
          Text('Grey'),
          Text('Tinted'),
          Text('Filled'),
          // small
          Text('Small'),
          CupertinoButton(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.small,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.small,
            color: CupertinoColors.systemGrey,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.small,
          ),
          CupertinoButton.filled(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.small,
          ),
          // medium
          Text('Medium'),
          CupertinoButton(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.medium,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.medium,
            color: CupertinoColors.systemGrey,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.medium,
          ),
          CupertinoButton.filled(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.medium,
          ),
          // large
          Text('Large'),
          CupertinoButton(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.large,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            color: CupertinoColors.systemGrey,
            size: CupertinoButtonSize.large,
          ),
          CupertinoButton.tinted(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.large,
          ),
          CupertinoButton.filled(
            child: body,
            onPressed: () {},
            size: CupertinoButtonSize.large,
          ),
        ].map((Widget w) => SizedBox(width: 110, height: 70, child: Center(child: w))).toList(),
      ),
      )
    ),
  );

```

*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*
https://dart.googlesource.com/external/github.com/flutter/flutter/+/dae3a87d936e0addb6734ba00635112e03318e94