Closed
Description
Steps to reproduce
- In a
CustomScrollViewwidget, set thecenterproperty with aGlobalKey - In the
slivers, place some sliver widgets, and ensure one of them is set with the sameGlobalKey - Wrap the CustomScrollView with a
RawScrollBar - First scroll the screen to top, then drag the scrollbar to move down a small distance.
Expected results
The scrollbar should move down within a small distance according to the user's gestures.
Actual results
The scrollbar unexpectedly jumps to the starting position and then scrolls down.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
final centerKey = GlobalKey();
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text("CustomScrollView demo")),
body: RawScrollbar(
thumbVisibility: true,
thumbColor: Colors.blueAccent,
thickness: 20,
child: CustomScrollView(
center: centerKey,
slivers: [
SliverToBoxAdapter(child: Container(height: 600.0, color: Colors.redAccent)),
SliverToBoxAdapter(key: centerKey, child: Container(height: 600.0)),
SliverToBoxAdapter(child: Container(height: 600.0, color: Colors.amberAccent)),
],
),
),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
2025-06-09.20.18.06.mov
Logs
Logs
NoneFlutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.32.2, on macOS 15.2 24C101 darwin-arm64, locale zh-Hans-CN) [532ms]
• Flutter version 3.32.2 on channel stable at /Users/greyhuiliu/fvm/versions/stable
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 8defaa71a7 (5 days ago), 2025-06-04 11:02:51 -0700
• Engine revision 1091508939
• Dart version 3.8.1
• DevTools version 2.45.1
• Pub download mirror https://mirrors.tencent.com/dart-pub/
• Flutter download mirror https://mirrors.tencent.com/flutter/
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1) [1,585ms]
• Android SDK at /Users/greyhuiliu/Library/Android/sdk
• Platform android-35, build-tools 35.0.1
• 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+-12932927-b750.29)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 16.2) [1,207ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16C5032a
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [16ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.3) [15ms]
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 21.0.5+-12932927-b750.29)
[✓] VS Code (version 1.99.3) [14ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.112.0
[✓] Proxy Configuration [52ms]
• HTTP_PROXY is set
• NO_PROXY is localhost,127.0.0.1,::1
• NO_PROXY contains localhost
• NO_PROXY contains 127.0.0.1
• NO_PROXY contains ::1
[✓] Connected device (3 available) [6.2s]
• iPhone 16 (mobile) • BB471954-F1E7-4186-A8F7-5528FF926CC7 • ios • com.apple.CoreSimulator.SimRuntime.iOS-18-3 (simulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 15.2 24C101 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 137.0.7151.69
! Error: Browsing on the local area network for Grey's. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
The device must be opted into Developer Mode to connect wirelessly. (code -27)
[✓] Network resources [442ms]
• All expected network resources are available.
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Important issues not at the top of the work listflutter/packages/flutter/material repository.Viewports, list views, slivers, etc.Found to occur in 3.32Found to occur in 3.33flutter/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 Design Languages teamTriaged by Design Languages team