Radio<T> class

A single radio button that selects one value from a mutually exclusive group.

Use groupValue to identify the currently selected value for the group. When the user activates this radio, onChanged is called with value.

Inheritance

Constructors

Radio({Key? key, required T value, required T? groupValue, ValueChanged<T?>? onChanged, FocusNode? focusNode, Color? activeColor, Color? checkColor})
Creates a Radio with the given value and groupValue.
const

Properties

activeColor → Color?
The color of the filled indicator when selected.
final
checkColor → Color?
The color of the check dot inside the indicator.
final
focusNode → FocusNode?
An optional focus node for keyboard navigation.
final
groupValue → T?
The currently selected value in the radio group.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another in the tree.
finalinherited
onChanged → ValueChanged<T?>?
Called when the user selects this radio button.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
value → T
The value represented by this radio button.
final

Methods

createElement() → StatefulElement
Creates the Element for this widget.
inherited
createState() → State<Radio<T>>
Creates the mutable state for this widget.
override
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