mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
bdb36c50d2
Run the code below:
```dart
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
void main() => runApp(const MaterialApp(home: MyApp()));
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
final GlobalKey _key = GlobalKey();
final GlobalKey _childNodeKey = GlobalKey();
late final List<TreeSliverNode<GlobalKey>> tree = [
TreeSliverNode<GlobalKey>(_key, expanded: true, children: [
TreeSliverNode<GlobalKey>(_childNodeKey),
]),
];
@override
Widget build(BuildContext context) {
return Scaffold(
body: CustomScrollView(
slivers: [
TreeSliver(
tree: tree,
indentation: TreeSliverIndentationType.custom(40),
treeRowExtentBuilder: (node, dimensions) => 40,
treeNodeBuilder: (context, node, animationStyle) {
return Container(
key: node.content as Key,
color: node.content == _key ? Colors.blue : Colors.green,
);
},
),
],
),
floatingActionButton: FloatingActionButton(
onPressed: () {
final RenderBox rb = _childNodeKey.currentContext!.findRenderObject() as RenderBox;
print(rb.localToGlobal(Offset.zero));
},
child: const Icon(Icons.add),
),
);
}
}
```
Get the screen:
When the `floatingActionButton` is clicked, it should print the position
of the green `Container`. The expected result is `Offset(40.0, 40.0)`,
but the actual result is `Offset(0.0, 40.0)`. `hitTest` also produces
incorrect results. This PR fixes the issue.
- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [ ] 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