Children of SliverCrossAxisGroup report incorrect gestures' localPosition. #174262
Description
Steps to reproduce
- Run the code sample
- Tap on the
0item (the local and globaldxvalues are equal, and this is correct, as the item is the leftmost) - Tap on the left side of the
1or2item (the local and globaldxvalues are equal, which is incorrect; the localdxvalue has to have a value near 0)
Expected results
The local position of the gesture for each child of SliverCrossAxisGroup is correct.
Actual results
The local position of the gesture for each child of SliverCrossAxisGroup is incorrect.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const App());
}
class App extends StatelessWidget {
const App({super.key});
@override
Widget build(BuildContext context) {
Widget buildItem(int index) {
return SliverToBoxAdapter(
child: GestureDetector(
behavior: HitTestBehavior.opaque,
onTapDown: (TapDownDetails details) {
print('[#$index item global] ${details.globalPosition}');
print('[#$index item local] ${details.localPosition}');
print('');
},
child: ColoredBox(
color: Colors.blue[(index + 1) * 200]!,
child: SizedBox(
height: 100,
child: Center(
child: Text('$index'),
),
),
),
),
);
}
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('SliverCrossAxisGroup')),
body: CustomScrollView(
slivers: <Widget>[
SliverCrossAxisGroup(
slivers: <Widget>[
buildItem(0),
buildItem(1),
buildItem(2),
],
),
],
),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
sliver_cross_axis_group_bug.mov
Flutter Doctor output
Doctor output
[✓] Flutter (Channel master, 3.35.0-1.0.pre-551, on macOS 15.6 24G84 darwin-arm64, locale en-US)
[2.2s]
• Flutter version 3.35.0-1.0.pre-551 on channel master at
/Users/ksokolovskyi/development/flutter_master
• Upstream repository [email protected]:ksokolovskyi/flutter.git
• FLUTTER_GIT_URL = [email protected]:ksokolovskyi/flutter.git
• Framework revision 47b253fdeb (10 hours ago), 2025-08-21 21:50:27 -0400
• Engine revision 47b253fdeb
• Dart version 3.10.0 (build 3.10.0-125.0.dev)
• DevTools version 2.49.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop,
enable-android, enable-ios, cli-animations, enable-native-assets, omit-legacy-version-file,
enable-lldb-debugging
[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [2.9s]
• Android SDK at /Users/ksokolovskyi/Library/Android/sdk
• Emulator version 35.4.9.0 (build_id 13025442) (CL:N/A)
• Platform android-36, build-tools 36.0.0
• ANDROID_HOME = /Users/ksokolovskyi/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.5+-13047016-b750.29)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 16.4) [964ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16F6
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [5ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Connected device (2 available) [6.1s]
• macOS (desktop) • macos • darwin-arm64 • macOS 15.6 24G84 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 139.0.7258.139
[✓] Network resources [1,752ms]
• All expected network resources are available.
• No issues found!Metadata
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flutter/packages/flutter/gestures repository.Viewports, list views, slivers, etc.Found to occur in 3.32Found to occur in 3.35flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onIssue is closed as already fixed in a newer versionOwned by Framework team
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