Closed
Description
Steps to Reproduce
- Execute
flutter runon the code sample - Scroll to the end
- Scroll to the start and notice that the visual part of the scrollbar becomes smaller because the scrollbar moves under the sliver app bar.
Expected results:
The Scrollbar has got padding top and never overlaps with the SliverAppBar.
Actual results:
The Scrollbar gets displayed below the SliverAppBar, thus parts of it become invisible for the user.
22-01-03-15-26-08.mp4
In the screenshot below you can see, that the scrollbar gets displayed under the (in this case opaque) sliver app bar.
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
extendBody: true,
body: NestedScrollView(
headerSliverBuilder: (context, _) {
return [
SliverAppBar(
elevation: 0,
title: const Text("Title"),
backgroundColor: Colors.white.withOpacity(0.1),
pinned: true,
foregroundColor: Colors.black,
flexibleSpace: const Placeholder(),
)
];
},
body: Builder(builder: (context) {
return MediaQuery.removePadding(
removeTop: true,
context: context,
child: Scrollbar(
isAlwaysShown: true,
child: ListView(children: [
Container(height: 500, color: Colors.orange),
Container(height: 500, color: Colors.yellow),
Container(height: 10, color: Colors.brown),
]),
),
);
}),
),
),
);
}
}Logs
[✓] Flutter (Channel stable, 2.8.1, on macOS 11.6.1 20G224 darwin-x64, locale en-DE)
• Flutter version 2.8.1 at /Users/tobias/Documents/Dev/Tools/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 77d935af4d (3 weeks ago), 2021-12-16 08:37:33 -0800
• Engine revision 890a5fca2e
• Dart version 2.15.1
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
• Android SDK at /Users/tobias/Library/Android/sdk
• Platform android-31, build-tools 31.0.0
• Java binary at: /Users/tobias/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/203.7784292/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• CocoaPods version 1.11.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 3.6)
• 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 1.8.0_212-release-1586-b4-5784211)
[✓] Android Studio (version 4.2)
• Android Studio at /Users/tobias/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/202.7486908/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 11.0.8+10-b944.6916264)
[✓] Android Studio (version 2020.3)
• Android Studio at /Users/tobias/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/203.7784292/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 11.0.10+0-b96-7281165)
[✓] IntelliJ IDEA Ultimate Edition (version 2021.2.3)
• IntelliJ at /Users/tobias/Library/Application Support/JetBrains/Toolbox/apps/IDEA-U/ch-1/212.5457.46/IntelliJ IDEA.app
• Flutter plugin version 62.0.3
• Dart plugin version 212.5632
[✓] VS Code (version 1.63.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension can be installed from:
🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] Connected device (3 available)
• ONEPLUS A5000 (mobile) • fd788fa0 • android-arm64 • Android 10 (API 29)
• macOS (desktop) • macos • darwin-x64 • macOS 11.6.1 20G224 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 96.0.4664.110
• No issues found!