FormFieldState<T> class abstract

Abstract state management class for FormField elements.

Manages the validation errors, lifecycle context hooks, and registration of a FormField with its parent Form. It hooks into didChangeDependencies and dispose to coordinate dynamic inherited widget bindings with FormScope.

Inheritance

Constructors

FormFieldState()

Properties

context → BuildContext
The location in the tree where this widget builds.
no setterinherited
errorText → String?
Retrieves the validation error message if invalid; otherwise, null.
no setter
hasError → bool
Returns whether this field currently holds an active validation error.
no setter
hashCode → int
The hash code for this object.
no setterinherited
mounted → bool
Whether this State object is currently in a tree.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
value → T?
Retrieves the current value of the form field.
no setter
widget → FormField<T>
The current configuration.
no setterinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
override
dispose() → void
Called when this object is removed from the tree permanently.
override
initState() → void
Called when this object is inserted into the tree.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
reset() → void
Resets the form field to its FormField.initialValue and clears any active errors.
setState(VoidCallback fn) → void
Notifies the framework that the internal state of this object has changed.
inherited
toString() → String
A string representation of this object.
inherited
validate() → bool
Triggers field validation using FormField.validator.

Operators

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