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add onReset callback to FormField #167060

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Merged
merged 4 commits into from
Apr 30, 2025
Merged

add onReset callback to FormField #167060

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88c5c75
add onReset callback
foxmind1 Apr 13, 2025
2fc3f19
remove FormFieldState from onReset
foxmind1 Apr 25, 2025
b21dd9b
add test
foxmind1 Apr 25, 2025
d758a98
add field type
foxmind1 Apr 29, 2025
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6 changes: 6 additions & 0 deletions packages/flutter/lib/src/widgets/form.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -466,6 +466,7 @@ class FormField<T> extends StatefulWidget {
super.key,
required this.builder,
this.onSaved,
this.onReset,
this.forceErrorText,
this.validator,
this.errorBuilder,
Expand All @@ -485,6 +486,10 @@ class FormField<T> extends StatefulWidget {
/// [FormState.save].
final FormFieldSetter<T>? onSaved;

/// An optional method to call when the form field is reset via
/// [FormFieldState.reset].
final VoidCallback? onReset;

/// An optional property that forces the [FormFieldState] into an error state
/// by directly setting the [FormFieldState.errorText] property without
/// running the validator function.
Expand Down Expand Up @@ -631,6 +636,7 @@ class FormFieldState<T> extends State<FormField<T>> with RestorationMixin {
_hasInteractedByUser.value = false;
_errorText.value = null;
});
widget.onReset?.call();
Form.maybeOf(context)?._fieldDidChange();
}

Expand Down
26 changes: 26 additions & 0 deletions packages/flutter/test/widgets/form_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,32 @@ void main() {
await checkText('');
});

testWidgets('onReset callback is called', (WidgetTester tester) async {
final GlobalKey<FormState> formKey = GlobalKey<FormState>();
bool resetCalled = false;

await tester.pumpWidget(
MaterialApp(
home: Form(
key: formKey,
child: FormField<String>(
builder: (_) => const SizedBox.shrink(),
onReset: () {
resetCalled = true;
},
),
),
),
);

expect(resetCalled, isFalse);

formKey.currentState!.reset();
await tester.pump();

expect(resetCalled, isTrue);
});

testWidgets('Validator sets the error text only when validate is called', (
WidgetTester tester,
) async {
Expand Down