FFormField<T, E> class abstract

An abstract base class for all form fields.

Provides:

  • A value of type T.
  • A validator that returns an exception of type E if validation fails.
  • Methods to check the validity of the field.
  • Access to any validation exceptions.
Inheritance
Implementers

Constructors

FFormField(T value)
An abstract base class for all form fields.

Properties

exception ↔ E?
The exception associated with the field after validation.
getter/setter pair
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 setter
isValid → bool
Indicates whether the field's value is valid.
no setter
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.
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
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.

Operators

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