KeyedField<T, E> mixin

A mixin that provides a GlobalKey to the form field.

The KeyedField mixin can be applied to any FFormField to associate a unique GlobalKey with the field. This is useful for referencing the field in the widget tree, managing focus, scrolling, or accessing the widget's state.

Example

class MyFormField extends FFormField<String, MyException> with KeyedField<String, MyException> {
  @override
  MyException? validator(String value) {
    // Implement your validation logic here
    return null;
  }
}

// Usage:
final field = MyFormField();
// Access the key:
final key = field.key;
Superclass constraints

Properties

exception ↔ E?
The exception associated with the field after validation.
getter/setter pairinherited
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
isInvalid → bool
Indicates whether the field's value is invalid.
no setterinherited
isValid → bool
Indicates whether the field's value is valid.
no setterinherited
key → GlobalKey<State<StatefulWidget>>
The GlobalKey associated with the field.
latefinal
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
value ↔ T
The current value stored in this notifier.
getter/setter pairinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
check() → Future<bool>
Validates the field asynchronously and updates the exception state.
inherited
dispose() → void
Discards any resources used by the object.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() → String
A string representation of this object.
inherited
validator(T value) → E?
Validates the current value of the field.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited