BidiTextFormField class

A FormField that contains a BidiTextField.

This is a convenience widget that wraps a BidiTextField widget in a FormField with automatic text direction detection based on content.

The text direction will automatically adjust based on the content being typed. Use the onDirectionChanged callback to be notified when the text direction changes.

When implementing validators, remember that text may be in either RTL or LTR format depending on content. Consider this when validating patterns or formatting.

For a documentation about the various parameters, see TextField and BidiTextField.

{@tool snippet}

Creates a BidiTextFormField with an InputDecoration and validator function. The field will automatically adjust text direction based on the content.

BidiTextFormField(
  decoration: const InputDecoration(
    icon: Icon(Icons.person),
    hintText: 'What do people call you?',
    labelText: 'Name *',
  ),
  onDirectionChanged: (direction) {
    print('Text direction changed to: $direction');
  },
  onSaved: (String? value) {
    // This optional block of code can be used to run
    // code when the user saves the form.
  },
  validator: (String? value) {
    return (value != null && value.contains('@')) ? 'Do not use the @ char.' : null;
  },
)

{@end-tool}

Inheritance

Constructors

BidiTextFormField.new({Key? key, Object groupId = EditableText, TextEditingController? controller, String? initialValue, FocusNode? focusNode, String? forceErrorText, InputDecoration? decoration = const InputDecoration(), TextInputType? keyboardType, TextCapitalization textCapitalization = TextCapitalization.none, TextInputAction? textInputAction, TextStyle? style, StrutStyle? strutStyle, TextDirection? textDirection, TextAlign textAlign = TextAlign.start, TextAlignVertical? textAlignVertical, bool autofocus = false, bool readOnly = false, bool? showCursor, String obscuringCharacter = '•', bool obscureText = false, bool autocorrect = true, SmartDashesType? smartDashesType, SmartQuotesType? smartQuotesType, bool enableSuggestions = true, MaxLengthEnforcement? maxLengthEnforcement, int? maxLines = 1, int? minLines, bool expands = false, int? maxLength, ValueChanged<String>? onChanged, GestureTapCallback? onTap, bool onTapAlwaysCalled = false, TapRegionCallback? onTapOutside, VoidCallback? onEditingComplete, ValueChanged<String>? onFieldSubmitted, FormFieldSetter<String>? onSaved, FormFieldValidator<String>? validator, List<TextInputFormatter>? inputFormatters, bool? enabled, bool? ignorePointers, double cursorWidth = 2.0, double? cursorHeight, Radius? cursorRadius, Color? cursorColor, Color? cursorErrorColor, Brightness? keyboardAppearance, EdgeInsets scrollPadding = const EdgeInsets.all(20.0), bool? enableInteractiveSelection, TextSelectionControls? selectionControls, InputCounterWidgetBuilder? buildCounter, ScrollPhysics? scrollPhysics, Iterable<String>? autofillHints, AutovalidateMode? autovalidateMode, ScrollController? scrollController, String? restorationId, bool enableIMEPersonalizedLearning = true, MouseCursor? mouseCursor, EditableTextContextMenuBuilder? contextMenuBuilder = _defaultContextMenuBuilder, SpellCheckConfiguration? spellCheckConfiguration, TextMagnifierConfiguration? magnifierConfiguration, UndoHistoryController? undoController, AppPrivateCommandCallback? onAppPrivateCommand, bool? cursorOpacityAnimates, BoxHeightStyle selectionHeightStyle = ui.BoxHeightStyle.tight, BoxWidthStyle selectionWidthStyle = ui.BoxWidthStyle.tight, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ContentInsertionConfiguration? contentInsertionConfiguration, WidgetStatesController? statesController, Clip clipBehavior = Clip.hardEdge, bool canRequestFocus = true, ValueChanged<TextDirection>? onDirectionChanged, int? sampleLength = 50})
Creates a FormField that contains a BidiTextField.

Properties

autovalidateMode → AutovalidateMode
Used to enable/disable this form field auto validation and update its error text.
finalinherited
builder → FormFieldBuilder<String>
Function that returns the widget representing this form field.
finalinherited
controller → TextEditingController?
Controls the text being edited.
final
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
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
groupId → Object
The group identifier for the TextFieldTapRegion of this text field.
final
hashCode → int
The hash code for this object.
no setterinherited
initialValue → String?
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
onChanged → ValueChanged<String>?
Called when the user initiates a change to the TextField's value.
final
onDirectionChanged → ValueChanged<TextDirection>?
Callback that is called when the text direction changes
final
onReset → VoidCallback?
An optional method to call when the form field is reset via FormFieldState.reset.
finalinherited
onSaved → FormFieldSetter<String>?
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
sampleLength → int?
Maximum number of characters to sample for direction detection.
final
validator → FormFieldValidator<String>?
An optional method that validates an input. Returns an error string to display if the input is invalid, or null otherwise.
finalinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → FormFieldState<String>
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