Implement tap to scroll to item in CupertinoPicker#153386
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auto-submit[bot] merged 20 commits intoflutter:masterfrom Aug 20, 2024
Merged
Implement tap to scroll to item in CupertinoPicker#153386auto-submit[bot] merged 20 commits intoflutter:masterfrom
auto-submit[bot] merged 20 commits intoflutter:masterfrom
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Piinks
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| // If a controller is provided for this widget, it is | ||
| // expected to handle its own tap to scroll behavior. | ||
| onTappedChild: (widget.scrollController == null) | ||
| ? (int index) => _handleChildTap(index, controller) | ||
| : null, |
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Why can't we support the user provided scroll controller?
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From a separate thread: doing so on the user provided scroll controller might conflict with their own implementation.
I wonder if we have an example of such a conflict?
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I'm increasingly believing there is a gesture conflict that is causing tests in date picker to fail.
Take this date picker test for example, along with the changes in this PR:
With tester.drag
testWidgets('TimerPicker minDate - maxDate with minuteInterval',
(WidgetTester tester) async {
DateTime date = DateTime.now();
final DateTime minimum = DateTime(2022, 6, 14, 3, 31);
final DateTime initial = DateTime(2022, 6, 14, 3, 40);
final DateTime maximum = DateTime(2022, 6, 14, 3, 49);
await tester.pumpWidget(
CupertinoApp(
home: Center(
child: SizedBox(
height: 400.0,
width: 400.0,
child: CupertinoDatePicker(
initialDateTime: initial,
minimumDate: minimum,
maximumDate: maximum,
minuteInterval: 5,
use24hFormat: true,
onDateTimeChanged: (DateTime newDate) {
date = newDate;
print('hiii');
},
),
),
),
),
);
// Drag picker minutes to min date
await tester.drag(find.text('40'), const Offset(0.0, 1000.0), touchSlopY: 0.0);
await tester.pumpAndSettle();
// Returns to min date.
expect(
date,
DateTime(2022, 6, 14, 3, 35),
);
});This test fails with the changes in this PR when tester.drag is used. However, it passes when tester.trackpadFling is used instead:
With tester.trackpadFling
testWidgets('TimerPicker minDate - maxDate with minuteInterval',
(WidgetTester tester) async {
DateTime date = DateTime.now();
final DateTime minimum = DateTime(2022, 6, 14, 3, 31);
final DateTime initial = DateTime(2022, 6, 14, 3, 40);
final DateTime maximum = DateTime(2022, 6, 14, 3, 49);
await tester.pumpWidget(
CupertinoApp(
home: Center(
child: SizedBox(
height: 400.0,
width: 400.0,
child: CupertinoDatePicker(
initialDateTime: initial,
minimumDate: minimum,
maximumDate: maximum,
minuteInterval: 5,
use24hFormat: true,
onDateTimeChanged: (DateTime newDate) {
date = newDate;
print('hiii');
},
),
),
),
),
);
// Drag picker minutes to min date
await tester.trackpadFling(find.text('40'), const Offset(0.0, 1000.0), 0.1);
await tester.pumpAndSettle();
// Returns to min date.
expect(
date,
DateTime(2022, 6, 14, 3, 35),
);
});
The documentation for tester.trackpadFling says:
A trackpad fling sends PointerPanZoom events instead of a sequence of touch events.
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From a separate thread: The scrollable used by CupertinoPicker has default drag start behavior DragStartBehavior.start. The documentation for tester.drag says:
Breaking the drag into multiple moves is necessary for accurate execution of drag update calls with a DragStartBehavior variable set to DragStartBehavior.start. Without such a change, the dragUpdate callback from a drag recognizer will never be invoked.
But the tests in date_picker.dart only uses one drag move.
Piinks
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Aug 16, 2024
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Finishes the work started by @Kavantix in flutter#110733. Fixes flutter#24089. Before: https://github.com/user-attachments/assets/7ca0d346-7538-44a0-b0b2-41cf96eee6eb After: https://github.com/user-attachments/assets/8da91188-28a0-4738-a216-e03946f00284 Native picker: https://github.com/user-attachments/assets/8662b3c0-0443-4f8d-818b-cabd97d37de8
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Finishes the work started by @Kavantix in #110733.
Fixes Tapping items is not working in CupertinoPicker.
Before:
flutter.before.tap.picker.mov
After:
flutter.tap.picker.mov
Native picker:
native.tap.picker.mov
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.