ReactiveField<T> class
A reactive, observable form field that exposes its current value, error message and validity through ValueNotifiers.
Unlike the imperative Form/FormTextField wrappers, ReactiveField
is fully reactive: listeners react to value and error changes without
manual setState calls.
Constructors
-
ReactiveField(T initial, {List<
FormFieldValidator< validators = const []})String> >
Properties
- currentError → String?
-
The current field error, or null.
no setter
-
error
→ ValueListenable<
String?> -
Observable error message, or null when the field has no error.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- initial → T
-
Initial value of the field.
final
- isEmpty → bool
-
Whether the field is non-empty (value is not whitespace).
no setter
- isValid → bool
-
Whether the field currently satisfies all validators.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
validators
→ List<
FormFieldValidator< String> > -
Validation rules applied to the raw string value.
final
-
value
→ ValueListenable<
T> -
Observable stream of the current value.
no setter
Methods
-
dispose(
) → void -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
setError(
String? message) → void - Sets the error without touching the value (e.g. from a server response).
-
toString(
) → String -
A string representation of this object.
inherited
-
update(
T next) → void - Sets the field value and re-validates.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited