Update the documentation of Semantics' onLongPress #35112
Description
Steps to Reproduce
A working repro is located at https://github.com/kpsroka/flutter_accessibility_demo/tree/onLongPress-Bug (notice the tag)
The core part of the problem is the following:
Semantics(
label: 'Counter button',
hint: 'Press to increase',
value: '$_counter',
enabled: true,
container: true,
excludeSemantics: true,
onTap: _incrementCounter,
onLongPress: _decrementCounter,
child: Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
)),
- Launch on an iOS device with VoiceOver enabled, or on an Android device with TalkBack enabled.
- Launch the project mentioned above.
- Move focus to the counter number. Double-tap to trigger the "tap" handler, double-tap & hold to trigger the "long press" handler.
Observed:
onTaphandler is being executed, whileonLongPresshandler isn't.
However, when you enable semantics debugger (uncomment this line), you'll be able to trigger the onLongPress handler.
Logs
flutter run --verbose without SemanticsDebugger
flutter run --verbose with SemanticsDebugger
Notice that I removed the debugPrint statements from the code before executing the above commands.
$ flutter doctor -v
[✓] Flutter (Channel beta, v1.6.3, on Mac OS X 10.14.5 18F132, locale en-PL)
• Flutter version 1.6.3 at /Users/krzysztofsroka/Library/Flutter
• Framework revision bc7bc94083 (5 weeks ago), 2019-05-23 10:29:07 -0700
• Engine revision 8dc3a4cde2
• Dart version 2.3.2 (build 2.3.2-dev.0.0 e3edfd36b2)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/krzysztofsroka/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• ANDROID_HOME = /Users/krzysztofsroka/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.2.1, Build version 10E1001
• ios-deploy 1.9.4
• CocoaPods version 1.6.1
[!] Android Studio (version 3.2)
• Android Studio at /Applications/Android Studio.app/Contents
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
[✓] VS Code (version 1.35.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.1.0
[✓] Connected device (1 available)
• CK test • 7fd603d4b73339426ca23d745840a51dfcfbaecc • ios • iOS 12.2
! Doctor found issues in 1 category.