Radio<T> class

A single choice in a group: selected when value equals groupValue ((o) selected, ( ) not). Enter or Space selects it when focused, as does a click, calling onChanged with this radio's value. Give every radio in the group the same groupValue and onChanged. Passing null disables it.

Inheritance
Available extensions

Constructors

Radio({Key? key, required T value, required T? groupValue, required void onChanged(T value)?, String? label, FocusNode? focusNode, bool autofocus = false, CellStyle? style})
const

Properties

autofocus → bool
Whether this radio requests focus when mounted.
final
focusNode → FocusNode?
Optional externally owned focus node used for activation.
final
groupValue → T?
Controlled group selection; equality with value selects this radio.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
finalinherited
label → String?
Optional visible text and semantic label beside the indicator.
final
onChanged → void Function(T value)?
Called with value on activation; null disables this radio.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
style → CellStyle?
Base styling, plus optional hover, focus, selected, and disabled state entries from CellStyle.interactive.
final
value → T
Value emitted when this radio is activated.
final

Methods

animate({Duration? duration, Curve? curve, Object? trigger, bool repeat = false}) → Animate

Available on Widget, provided by the AnimateExtension extension

Starts an Animate chain over this widget. duration / curve apply to the whole chain. With no trigger it plays on mount; with a non-null trigger it rests on mount and replays whenever the token changes.
build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates the Element that will mount this widget into the tree.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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