63 Commits

Author SHA1 Message Date
Kate Lovett
9d96df2364
Modernize framework lints (#179089)
WIP

Commits separated as follows:
- Update lints in analysis_options files
- Run `dart fix --apply`
- Clean up leftover analysis issues 
- Run `dart format .` in the right places.

Local analysis and testing passes. Checking CI now.

Part of https://github.com/flutter/flutter/issues/178827
- Adoption of flutter_lints in examples/api coming in a separate change
(cc @loic-sharma)

## Pre-launch Checklist

- [ ] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [ ] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [ ] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [ ] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [ ] I updated/added relevant documentation (doc comments with `///`).
- [ ] 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.
- [ ] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

**Note**: The Flutter team is currently trialing the use of [Gemini Code
Assist for
GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code).
Comments from the `gemini-code-assist` bot should not be taken as
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useful you can update your code accordingly, but if you are unsure or
disagree with the feedback, please feel free to wait for a Flutter team
member's review for guidance on which automated comments should be
addressed.

<!-- 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
2025-11-26 01:10:39 +00:00
Kate Lovett
a04fb324be
Bump Dart to 3.8 and reformat (#171703)
Bumps the Dart version to 3.8 across the repo (excluding
engine/src/flutter/third_party) and applies formatting updates from Dart
3.8.

## 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].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [ ] 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
2025-07-07 17:58:32 +00:00
Michael Goderbauer
5491c8c146
Auto-format Framework (#160545)
This auto-formats all *.dart files in the repository outside of the
`engine` subdirectory and enforces that these files stay formatted with
a presubmit check.

**Reviewers:** Please carefully review all the commits except for the
one titled "formatted". The "formatted" commit was auto-generated by
running `dev/tools/format.sh -a -f`. The other commits were hand-crafted
to prepare the repo for the formatting change. I recommend reviewing the
commits one-by-one via the "Commits" tab and avoiding Github's "Files
changed" tab as it will likely slow down your browser because of the
size of this PR.

---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00
Taha Tesser
00ef750d28
[Reland] Introduce double Flex.spacing parameter for Row/Column spacing (#152890)
Relands https://github.com/flutter/flutter/pull/152472 (Fixed error causing message test, maybe by https://github.com/flutter/flutter/pull/152501)

---

fixes [add spacing parameter to Column and Row](https://github.com/flutter/flutter/issues/55378)

### `Column.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Column(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}
```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 40 59" src="https://github.com/user-attachments/assets/14f21091-9e46-4a58-8552-1379f4ba9216">

### `Row.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Row(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}

```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 39 42" src="https://github.com/user-attachments/assets/717e9f5e-a491-4853-ba74-e72ec7493363">
2024-08-05 23:04:50 +00:00
auto-submit[bot]
463a1532b3
Reverts "Introduce double Flex.spacing parameter for Row/Column spacing (#152472)" (#152885)
Reverts: flutter/flutter#152472
Initiated by: goderbauer
Reason for reverting: Tests are failing, e.g. https://ci.chromium.org/ui/p/flutter/builders/prod/Mac%20tool_integration_tests_5_5/127/overview
Original PR Author: TahaTesser

Reviewed By: {Piinks, goderbauer, Hixie}

This change reverts the following previous change:
fixes [add spacing parameter to Column and Row](https://github.com/flutter/flutter/issues/55378)

### `Column.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Column(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}
```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 40 59" src="https://github.com/user-attachments/assets/14f21091-9e46-4a58-8552-1379f4ba9216">

### `Row.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Row(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}

```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 39 42" src="https://github.com/user-attachments/assets/717e9f5e-a491-4853-ba74-e72ec7493363">
2024-08-05 19:32:47 +00:00
Taha Tesser
48ecec16ee
Introduce double Flex.spacing parameter for Row/Column spacing (#152472)
fixes [add spacing parameter to Column and Row](https://github.com/flutter/flutter/issues/55378)

### `Column.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Column(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Column(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.bottomCenter,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}
```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 40 59" src="https://github.com/user-attachments/assets/14f21091-9e46-4a58-8552-1379f4ba9216">

### `Row.spacing` 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(
        backgroundColor: Colors.black,
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: DecoratedBox(
              decoration: BoxDecoration(
                  border: Border.all(
                color: Colors.amber,
              )),
              child: const Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  Row(
                    spacing: 40.0,
                    // ignore: avoid_redundant_argument_values
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceAround,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerRight,
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                  Row(
                    spacing: 40.0,
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: <Widget>[
                      ColoredBox(
                        color: Color(0xffff0000),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            alignment: Alignment.centerLeft,
                            child: Text(
                              'RED',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff00ff00),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Center(
                            child: Text(
                              'GREEN',
                              style: TextStyle(color: Colors.black),
                            ),
                          ),
                        ),
                      ),
                      ColoredBox(
                        color: Color(0xff0000ff),
                        child: SizedBox(
                          width: 50.0,
                          height: 75.0,
                          child: Align(
                            child: Text(
                              'BLUE',
                              style: TextStyle(color: Colors.white),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}

```

</details>

### Preview

<img width="1072" alt="Screenshot 2024-07-30 at 15 39 42" src="https://github.com/user-attachments/assets/717e9f5e-a491-4853-ba74-e72ec7493363">
2024-08-05 16:52:58 +00:00
LongCatIsLooong
0214afb40b
Fix the RenderFlex.computeDryBaseline implementation to match computeDistanceToActualBaseline (#149062)
Per Hixie's comment [here](https://github.com/flutter/flutter/issues/145739#issuecomment-2128006146), keep the current behavior
2024-05-28 23:21:08 +00:00
Anis Alibegić
140edb9883
Fixed few typos (#147087)
Here's another PR with a couple of typos fixed. As you can see there was a typo in _fileReferenceI**n**dentifiers_, in class _ParsedProjectInfo._ Maybe we should do some check on that since I'm not sure if that property is used somewhere outside Flutter?
2024-04-22 16:49:19 +00:00
LongCatIsLooong
a81729c68e
Renderflex cross intrinsic size with baseline alignment (#146185) 2024-04-03 17:41:50 +00:00
LongCatIsLooong
460a5e22bd
RenderFlex baseline intrinsics (#145483)
Implements `RenderFlex` intrinsics calculation when children are baseline aligned in the cross axis.
2024-03-28 23:07:06 +00:00
Michael Goderbauer
fda9ecfef7
Remove 1745 decorative breaks (#123259)
Remove 1745 decorative breaks
2023-03-22 21:12:22 +00:00
Greg Spencer
ee8488e871
Remove warnings when UnconstrainedBox and ConstraintsTransformBox are clipped (#110393) 2022-08-29 17:21:04 +00:00
Ian Hickson
ab89ce285f
Clean up the bindings APIs. (#89451) 2022-02-03 14:55:15 -08:00
Ian Hickson
61a0add286
Enable avoid_redundant_argument_values lint (#91409) (#91462) 2021-10-08 09:25:14 -07:00
Zachary Anderson
b9d2177da0
Revert "Enable avoid_redundant_argument_values lint (#91409)" (#91461)
This reverts commit 5fd259be244244e14ff87fee9b6a721625f952cd.
2021-10-07 21:11:07 -07:00
Ian Hickson
5fd259be24
Enable avoid_redundant_argument_values lint (#91409) 2021-10-07 20:13:02 -07:00
Dan Field
025397ae3f
Release retained resources from layers/dispose pictures (#84740) 2021-06-25 12:01:03 -07:00
Greg Spencer
1ac209c222
Turn on avoid_dynamic_calls lint, make appropriate changes. (#84478) 2021-06-23 16:36:03 -07:00
Alexandre Ardhuin
59fc92168a
add missing trailing commas (#81065) 2021-04-23 22:47:40 +02:00
Alexandre Ardhuin
d546e1d311
fix for upcoming lint use_named_constants (#74788) 2021-01-27 20:20:44 +01:00
Todd Volkert
e2a0d03b79
Avoid null check operator failure in RenderFlex._hasOverflow (#72122)
Fixes https://github.com/flutter/flutter/issues/71972
2020-12-17 19:25:28 -08:00
Michael Goderbauer
786d0306db
Assert for RenderFlex intrinsics if using baseline alignment (#70139) 2020-11-10 14:29:41 -08:00
Alexandre Ardhuin
4acc790252
enable lint cast_nullable_to_non_nullable (#67629) 2020-10-08 21:05:43 +02:00
Kate Lovett
019e90f7df
[NNBD] Migrates some rendering tests (#67449) 2020-10-07 16:27:06 -07:00
liyuqian
42e02d60d3
Reland non-breaking "Add clipBehavior to widgets with clipRect #55977" (#59364)
* Revert "Revert "Add clipBehavior to widgets with clipRect (#55977)" (#58344)"

This reverts commit 1d395c5e187370f2838bb043d3b438029b484bfc.

* Add missed Overflow
2020-06-17 10:57:40 -07:00
Alexandre Ardhuin
4d7525f05c
Opt out nnbd in packages/flutter (#59186)
* add language version 2.8 in packages/flutter

* enable non-nullable analyzer flag
2020-06-11 14:11:30 +02:00
Mehmet Fidanboylu
1d395c5e18
Revert "Add clipBehavior to widgets with clipRect (#55977)" (#58344)
This reverts commit cd593dae1961ca2bc5c045a310f16e6cdffc8294.
2020-05-31 07:41:50 -07:00
liyuqian
cd593dae19
Add clipBehavior to widgets with clipRect (#55977)
* Add clipBehavior to RenderFlex

* Add clipBehavior to FittedBox

* Add clipBehavior to Flex and FittedBox

* Add clipBehavior to UnconstrainedBox

* Add clipBehavior to Stack and Wrap

* Add clipBehavior to TextEditable

* Add clipBehavior to ListWheelScrollView

* Add clipBehavior to SingleChildScrollView

* Add clipBehavior to RenderViewportBase's widgets

Those widgets are NestedScrollView and ShrinkWrappingViewport.

* Fix tests

* Remove enum Overflow and fix typo

* Remove clipToSize

* Analyze fix

* Remove Mixin and other small fixes

* Fix tests and respect Stack's default clipBehavior

* Add Overflow back to make it non-breaking

* Restore clipBehavior to make it non-breaking

* Small fixes

* Fix rebase
2020-05-29 15:38:50 -07:00
Dan Field
8b2993337a
revert #48985 (#49572) 2020-01-27 14:36:02 -08:00
Anthony
b67d5ec6e9 [a11y] Make sure RenderFractionalTranslation updates its semantics after the translation field is set (#48985) 2020-01-17 15:13:01 -08:00
Alexandre Ardhuin
003541499b use isA<Xxx>() matcher (#48482) 2020-01-16 12:43:03 -08:00
Alexandre Ardhuin
dfbd585668 implicit-casts:false in flutter/test (#46245) 2019-12-16 15:03:02 -08:00
Ian Hickson
449f4a6673
License update (#45373)
* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs
2019-11-27 15:04:02 -08:00
Yegor
34c692659e
Teach render objects to reuse engine layers (#36402)
Teach Layer and its implementations, RenderObject and its implementations, and PaintingContext to reuse engine layers. The idea is that a concrete RenderObject creates a Layer and holds on to it as long as it needs it (i.e. when it is composited, and the layer type does not change). In return, each Layer object holds on to an EngineLayer and reports it to the engine via addRetained and oldLayer. This allows the Web engine to reuse DOM elements across frames. Without it, each frame drops all previously rendered HTML and regenerates it from scratch.
2019-08-16 15:27:12 -07:00
Dan Field
5b2281e747
Make Flex only overflow on epsilon (#31890) 2019-05-01 17:28:33 -07:00
Alexandre Ardhuin
387f885481
Add missing trailing commas (#28673)
* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change
2019-03-01 08:17:55 +01:00
Alexandre Ardhuin
d927c93310
Unnecessary new (#20138)
* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests
2018-09-12 08:29:29 +02:00
Alexandre Ardhuin
eda03e2586
re-re-enable lint unnecessary_const (#20103) 2018-08-02 12:02:32 +02:00
Todd Volkert
00aac68e2d
Revert flutter/flutter#19592 (#19861)
It was causing problems rolling Flutter into Fuchsia
2018-07-27 08:44:39 -07:00
Alexandre Ardhuin
27018359d2
re-enable lint unnecessary_const (#19592)
* re-enable lint unnecessary_const

* remove trailling whitespaces

* remove unnecessary const (after merge)
2018-07-23 08:31:48 +02:00
Ian Hickson
f630f90d6d
Revert "enable lint unnecessary_const (#19342)" (#19423)
This reverts commit cc1cf13eec6752af992d3db0265cf04cc90bfd13.
2018-07-16 13:30:27 -07:00
Alexandre Ardhuin
cc1cf13eec
enable lint unnecessary_const (#19342) 2018-07-16 21:43:48 +02:00
Ian Hickson
6599271bf5
Revert matcher package (#18614)
The new matcher package deprecates isInstanceOf which seems eggregious.
2018-06-19 17:22:56 -07:00
Greg Spencer
08d1ec36de Roll engine to 0c119932c0d6cb30dafd75ec717d1eda76fd7651 (#18575) 2018-06-19 09:58:20 +02:00
Jason Simmons
466d15433f
Use Dart 2 camel case constants (#15360) 2018-03-12 11:06:32 -07:00
Alexandre Ardhuin
841d5d7bd5
prefer_const_declarations on local variables (#14358) 2018-02-01 07:51:26 +01:00
Ian Hickson
e064d6cbc9
RenderFlex with MainAxisSize.min RTL (#12875)
There was a left-bias when MainAxisSize.min couldn't be honoured.
2017-11-03 17:50:11 -07:00
Jacob Richman
f2ab841ac4 Add DiagnosticLevel used to filter how verbose toStringDeep output for (#11995)
Diagnostics object is.
2017-09-11 19:01:05 -07:00
Ian Hickson
ca7d2d23cf TextPainter RTL (#11888) 2017-09-07 16:57:38 -07:00
Alexandre Ardhuin
bb4f4070f9 Prefer const constructors (#11853)
* upgrade to linter-0.1.35

* re-enable lint prefer_const_constructors

* address review comments
2017-08-31 08:55:21 +02:00