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Description
Steps to reproduce
- Create a simple view with a cupertinoPicker widget (attached code in code sample section)
- Try scrolling through the values a couple of times in a row
Expected results
The expected result is to be able to scroll the selector and get a smooth change, without getting stuck on any value
Actual results
The current result is that when scrolling in the cupertino picker widget, after having scrolled a couple of times, it stops at a value
Code sample
Code sample
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class Cupertino extends StatefulWidget {
const Cupertino({super.key});
@override
State<Cupertino> createState() => _CupertinoState();
}
class _CupertinoState extends State<Cupertino> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: SizedBox(
height: 300,
child: CupertinoPicker(
backgroundColor: Colors.white,
itemExtent: 32.0,
onSelectedItemChanged: (int index) {},
children: List<Widget>.generate(150, (int index) {
return Center(
child: Text(' $index'),
);
}),
),
),
),
);
}
}
Screenshots or Video
Screenshots / Video demonstration
demoCupertinoPicker.mov
Logs
Logs
flutter: ══╡ EXCEPTION CAUGHT BY GESTURE ╞═══════════════════════════════════════════════════════════════════
flutter: The following UnsupportedError was thrown while handling a gesture:
flutter: Unsupported operation: Infinity or NaN toInt
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 double.toInt (dart:core-patch/double.dart)
flutter: #1 double.round (dart:core-patch/double.dart:194:34)
flutter: #2 _getItemFromOffset (package:flutter/src/widgets/list_wheel_scroll_view.dart:352:96)
flutter: #3 FixedExtentScrollPhysics.createBallisticSimulation (package:flutter/src/widgets/list_wheel_scroll_view.dart:500:35)
flutter: #4 ScrollPositionWithSingleContext.goBallistic (package:flutter/src/widgets/scroll_position_with_single_context.dart:144:44)
flutter: #5 ScrollDragController.end (package:flutter/src/widgets/scroll_activity.dart:439:14)
flutter: #6 ScrollableState._handleDragEnd (package:flutter/src/widgets/scrollable.dart:845:12)
flutter: #7 DragGestureRecognizer._checkEnd.<anonymous closure> (package:flutter/src/gestures/monodrag.dart:605:47)
flutter: #8 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:315:24)
flutter: #9 DragGestureRecognizer._checkEnd (package:flutter/src/gestures/monodrag.dart:605:5)
flutter: #10 DragGestureRecognizer.didStopTrackingLastPointer (package:flutter/src/gestures/monodrag.dart:483:9)
flutter: #11 OneSequenceGestureRecognizer.stopTrackingPointer (package:flutter/src/gestures/recognizer.dart:505:9)
flutter: #12 DragGestureRecognizer._giveUpPointer (package:flutter/src/gestures/monodrag.dart:492:5)
flutter: #13 DragGestureRecognizer.handleEvent (package:flutter/src/gestures/monodrag.dart:451:7)
flutter: #14 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:98:12)
flutter: #15 PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:143:9)
flutter: #16 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:633:13)
flutter: #17 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:141:18)
flutter: #18 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:127:7)
flutter: #19 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:495:19)
flutter: #20 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:475:22)
flutter: #21 RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:430:11)
flutter: #22 GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:420:7)
flutter: #23 GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:383:5)
flutter: #24 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:330:7)
flutter: #25 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:299:9)
flutter: #26 _invoke1 (dart:ui/hooks.dart:328:13)
flutter: #27 PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:429:7)
flutter: #28 _dispatchPointerDataPacket (dart:ui/hooks.dart:262:31)
flutter:
flutter: Handler: "onEnd"
flutter: Recognizer:
flutter: VerticalDragGestureRecognizer#dcb00
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════
flutter: Another exception was thrown: 'package:flutter/src/widgets/scrollable.dart': Failed assertion: line 821 pos 12: '_drag == null': is not true.Flutter Doctor output
Doctor output
[!] Flutter (Channel [user-branch], 3.19.6, on macOS 14.3.1 23D60 darwin-arm64, locale es-ES)
! Flutter version 3.19.6 on channel [user-branch] at /Users/irene/development/flutter
Currently on an unknown channel. Run `flutter channel` to switch to an official channel.
If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/docs/get-started/install.
! Upstream repository unknown source is not a standard remote.
Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.
• Framework revision 54e66469a9 (7 weeks ago), 2024-04-17 13:08:03 -0700
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• Dart version 3.3.4
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[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /Users/irene/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
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• Xcode at /Applications/Xcode.app/Contents/Developer
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[✓] Connected device (4 available)
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Issues that are less important to the Flutter projectIssues that are less important to the Flutter projectError messages from the Flutter frameworkError messages from the Flutter frameworkflutter/packages/flutter/cupertino repositoryflutter/packages/flutter/cupertino repositoryViewports, list views, slivers, etc.Viewports, list views, slivers, etc.Found to occur in 3.22Found to occur in 3.22Found to occur in 3.23Found to occur in 3.23flutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work onOwned by Design Languages teamOwned by Design Languages teamTriaged by Design Languages teamTriaged by Design Languages team