[A11y] Double Tap brings the Slider thumb to the center of the widget. #156427
Description
Steps to reproduce
- Turn on Android TalkBack or iOS VoiceOver.
- Load the simple app with one Flutter Slider.
- Try double tapping on a tick.
Expected results
Double tapping a tick should move the slider indicator to that tick.
Actual results
If the indicator is off-center, the indicator will return to center after a double tap.
From my own research, I believe this could be related to how GestureDetectors and GestureRecognizers work when accessibility mode is on.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
MyApp();
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Slider A11Y Demo',
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatelessWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(title)),
body: MySlider(),
);
}
}
class MySlider extends StatefulWidget {
MySlider({Key? key}) : super(key: key);
@override
State createState() => _MySliderState();
}
class _MySliderState extends State<MySlider> {
double _currentSliderValue = 50.0;
void _onChanged(double value) {
setState(() {
_currentSliderValue = value;
});
}
@override
Widget build(BuildContext context) {
return Slider(
value: _currentSliderValue,
min: -100,
max: 100,
divisions: 8,
label: 'Current Value: $_currentSliderValue',
onChanged: _onChanged,
);
}
}
Screenshots or Video
Screenshots / Video demonstration
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
$ fg3 doctor -v
[ +2 ms] ProcessManager.runSync('which java')
[ +5 ms] executing: /usr/local/buildtools/java/jdk/bin/java --version
[ +1 ms] ProcessManager.runSync('/usr/local/buildtools/java/jdk/bin/java --version')
[ +38 ms] Exit code 0 from: /usr/local/buildtools/java/jdk/bin/java --version
[ +1 ms] openjdk 23 2024-10-02
OpenJDK Runtime Environment (build 23+-google-release-sts-681679659)
OpenJDK 64-Bit Server VM (build 23+-google-release-sts-681679659, mixed mode, sharing)
[ +1 ms] executing: /usr/bin/adb devices -l
[ +1 ms] ProcessManager.run('/usr/bin/adb devices -l')
[ +1 ms] Gallium device polling: connecting to galliumd.
[ +1 ms] [✓] Flutter (Channel google3, on Debian GNU/Linux rodete 6.9.10-1rodete5-amd64, locale en_US.UTF-8)
[ +1 ms] • Framework revision 621e7ef951 (13 days ago), 2024-09-25T00:00:00.000
[ +1 ms] • Engine revision d6d5fdba6a
[ +1 ms] • Dart version dd73afd20b
[ +1 ms] [✓] Android toolchain - develop for Android devices (Android SDK version Stable)
[ +1 ms] • Android SDK at google3
[ +1 ms] • Platform Stable, build-tools Stable
[ +1 ms] • Java binary at: /usr/local/buildtools/java/jdk/bin/java
[ +1 ms] • Java version OpenJDK Runtime Environment (build 23+-google-release-sts-681679659)
[ +1 ms] [✓] VS Code (version 1.87.1)
[ +1 ms] • VS Code at /usr/share/code
[ +1 ms] • Flutter extension can be installed from:
[ +1 ms] 🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[ +43 ms] List of devices attached
localhost:38637 device product:oriole model:Pixel_6 device:oriole transport_id:5
[ +2 ms] Gallium device polling failed to connect to galliumd: gRPC Error (code: 14, codeName: UNAVAILABLE, message: Error connecting: SocketException: Connection refused (OS Error: Connection refused, errno = 111),
address = localhost, port = 46084, details: null, rawResponse: null, trailers: {})
[ +1 ms] /usr/bin/adb -s localhost:38637 shell getprop
[ +1 ms] ProcessManager.run('/usr/bin/adb -s localhost:38637 shell getprop')
[ +164 ms] ro.hardware = oriole
[ +2 ms] ro.build.characteristics = nosdcard
[ +1 ms] executing: uname -m
[ +1 ms] ProcessManager.runSync('uname -m')
[ +3 ms] Exit code 0 from: uname -m
[ +1 ms] x86_64
[ +1 ms] executing: /usr/bin/adb devices -l
[ +1 ms] ProcessManager.run('/usr/bin/adb devices -l')
[ +3 ms] List of devices attached
localhost:38637 device product:oriole model:Pixel_6 device:oriole transport_id:5
[ +2 ms] [✓] Connected device (2 available)
[ +1 ms] • Pixel 6 (mobile) • localhost:38637 • android-arm64 • Android 15 (API 35)
[ +1 ms] • Linux (desktop) • linux • linux-x64 • Debian GNU/Linux rodete 6.9.10-1rodete5-amd64
[ +1 ms] [✓] Google3 (on linux)
[ +1 ms] • KVM enabled
[ +1 ms] • No issues found!
[ +1 ms] "flutter doctor" took 306ms.
[ +646 ms] ensureAnalyticsSent: 645ms
[ +2 ms] Running 1 shutdown hook
[ +1 ms] Shutdown hooks complete
[ +1 ms] exiting with code 0Internal Bug ID
b/364625445
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Metadata
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Labels
Accessibility, e.g. VoiceOver or TalkBack. (aka a11y)flutter/packages/flutter/material repository.Found to occur in 3.24Found to occur in 3.26flutter/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 team
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Status
Status