FormBuilderField<T> class

A single form field.

This widget maintains the current state of the form field, so that updates and validation errors are visually reflected in the UI.

Inheritance

Constructors

FormBuilderField({Key? key, FormFieldSetter<T>? onSaved, T? initialValue, AutovalidateMode? autovalidateMode, bool enabled = true, FormFieldValidator<T>? validator, String? restorationId, required FormFieldBuilder<T> builder, FormFieldErrorBuilder? errorBuilder, VoidCallback? onReset, required String name, ValueTransformer<T?>? valueTransformer, ValueChanged<T?>? onChanged, FocusNode? focusNode})
Creates a single form field.
const

Properties

autovalidateMode → AutovalidateMode
Used to enable/disable this form field auto validation and update its error text.
finalinherited
builder → FormFieldBuilder<T>
Function that returns the widget representing this form field.
finalinherited
enabled → bool
Whether the form is able to receive user input.
finalinherited
errorBuilder → FormFieldErrorBuilder?
Function that returns the widget representing the error to display.
finalinherited
focusNode → FocusNode?
An optional focus node to use as the focus node for this widget.
final
forceErrorText → String?
An optional property that forces the FormFieldState into an error state by directly setting the FormFieldState.errorText property without running the validator function.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
initialValue → T?
An optional value to initialize the form field to, or null otherwise.
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
name → String
Used to reference the field within the form, or to reference form data after the form is submitted.
final
onChanged → ValueChanged<T?>?
Called when the field value is changed.
final
onReset → VoidCallback?
An optional method to call when the form field is reset via FormFieldState.reset.
finalinherited
onSaved → ValueChanged<T?>?
An optional method to call with the final value when the form is saved via FormState.save.
finalinherited
restorationId → String?
Restoration ID to save and restore the state of the form field.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
validator → FormFieldValidator<T>?
An optional method that validates an input. Returns an error string to display if the input is invalid, or null otherwise.
finalinherited
valueTransformer → ValueTransformer<T?>?
Called just before field value is saved. Used to massage data just before committing the value.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → FormBuilderFieldState<FormBuilderField<T>, T>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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