ExpansionTile Unable to remove right padding from title #145268
Description
Steps to reproduce
Run the provided code
Expected results
The ExpansionTile's title spans the available width.
Actual results
The tile is cut short by 32.0 units.
Code sample
Code sample
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(
home: Scaffold(
body: SafeArea(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ListTileTheme(
contentPadding: EdgeInsets.zero,
horizontalTitleGap: 0,
minVerticalPadding: 0,
dense: true,
child: ExpansionTile(
tilePadding: EdgeInsets.zero,
title: Container(
color: Colors.red,
alignment: Alignment.centerLeft,
child: Text('Expansion Tile'),
height: 50,
),
trailing: const SizedBox.shrink(),
children: const [
ListTile(title: Text('Item 1')),
ListTile(title: Text('Item 2')),
ListTile(title: Text('Item 3')),
],
),
),
],
),
),
),
);
}
}
Screenshots or Video
I traced it down to list_tile.dart's performLayout where it says:
Removing the 32.0 from the adjustedTrailingWidth computation and putting in 0.0 instead makes the title span the full width as expected.
I ran tests with the changed value:
~/Flutter/flutter/packages/flutter > flutter test ./test/material/list_tile_test.dart
Resolving dependencies...
leak_tracker 10.0.0 (10.0.4 available)
leak_tracker_flutter_testing 2.0.1 (3.0.3 available)
leak_tracker_testing 2.0.1 (3.0.1 available)
material_color_utilities 0.8.0 (0.11.1 available)
meta 1.11.0 (1.12.0 available)
test_api 0.6.1 (0.7.0 available)
vm_service 13.0.0 (14.1.0 available)
web 0.4.0 (0.5.1 available)
Got dependencies!
8 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
00:08 +68: All tests passed!
So either there are more and just testing list_tile is not enough or it is not tested. I assume goldens would break.
See below comment for better analysis.
What is the reason why the value is 32.0?
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.19.2, on macOS 14.3 23D56 darwin-arm64, locale en-CZ)
• Flutter version 3.19.2 on channel stable at /Users/michalhazdra/Flutter/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 7482962148 (3 weeks ago), 2024-02-27 16:51:22 -0500
• Engine revision 04817c99c9
• Dart version 3.3.0
• DevTools version 2.31.1
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /Users/michalhazdra/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15C500b
• CocoaPods version 1.14.3
[✗] Chrome - develop for the web (Cannot find Chrome executable at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Android Studio (version 2023.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
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• Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.3)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin can be installed from:
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• Dart plugin can be installed from:
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[✓] VS Code (version 1.87.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.84.0
[✓] Network resources
• All expected network resources are available.
! Doctor found issues in 1 category.Metadata
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Important issues not at the top of the work listflutter/packages/flutter/material repository.Found to occur in 3.19Found to occur in 3.21flutter/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