TRadioGroup<T> class

A group of radio buttons for single selection.

TRadioGroup provides a single-select input with:

  • Single radio button selection
  • Keyboard navigation support
  • Validation support
  • Vertical or horizontal layout
  • Value binding with ValueNotifier

Basic Usage

TRadioGroup<String>(
  label: 'Select an option',
  items: [
    TRadioGroupItem(value: 'option1', label: 'Option 1'),
    TRadioGroupItem(value: 'option2', label: 'Option 2'),
    TRadioGroupItem(value: 'option3', label: 'Option 3'),
  ],
  onValueChanged: (value) => print('Selected: $value'),
)

Type parameter:

  • T: The type of values for the radio buttons

See also:

Inheritance
Mixed-in types

Constructors

TRadioGroup({Key? key, String? label, String? tag, String? helperText, bool isRequired = false, bool disabled = false, bool clearable = false, TInputFieldTheme? theme, VoidCallback? onTap, FocusNode? focusNode, T? value, ValueNotifier<T?>? valueNotifier, ValueChanged<T?>? onValueChanged, List<String? Function(T?)>? rules, Duration? validationDebounce, List<TRadioGroupItem<T>> items = const [], Color? color, bool block = true, bool vertical = false, bool autoFocus = false, double spacing = 16, double runSpacing = 8})
Creates a radio group.
const

Properties

autoFocus → bool
Whether to auto-focus the first radio button.
final
block → bool
Whether to display in block mode.
final
clearable → bool
Whether the field shows a clear button when it has a value.
final
color → Color?
Custom color for the radio buttons.
final
disabled → bool
Whether the field is disabled.
final
focusNode → FocusNode?
Custom focus node.
final
hashCode → int
The hash code for this object.
no setterinherited
helperText → String?
The helper text.
final
isRequired → bool
Whether the field is required.
final
items → List<TRadioGroupItem<T>>
The list of radio group items.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
label → String?
The label text.
final
onTap → VoidCallback?
Callback for tap events.
final
onValueChanged → ValueChanged<T?>?
Callback fired when the value changes.
final
rules → List<String? Function(T?)>?
List of validation rules.
final
runSpacing → double
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
spacing → double
final
tag → String?
The tag text (optional).
final
theme → TInputFieldTheme?
Custom theme.
final
validationDebounce → Duration?
Debounce duration for validation trigger.
final
value → T?
The initial value.
final
valueNotifier → ValueNotifier<T?>?
A ValueNotifier for two-way binding.
final
vertical → bool
Whether to display vertically.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<TRadioGroup<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
validateValue(T? value) → List<String>
Validates the given value against the rules.
inherited

Operators

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