RawRadio<T> class

A Radio button that provides basic radio functionalities.

Provide the builder to draw UI for radio.

If drawing a radial ink reaction is desired (in Material Design for example), consider providing CustomPaint with a subclass of ToggleablePainter as a CustomPaint.painter, which implements logic to draw a radial ink reaction for this control. The painter is usually configured with the ToggleableStateMixin.reaction, ToggleableStateMixin.position, ToggleableStateMixin.reactionHoverFade, and ToggleableStateMixin.reactionFocusFade animation provided by this mixin. It is expected to draw the visuals of the Toggleable based on the current value of these animations. The animations are triggered by this mixin to transition the Toggleable from one state to another.

This widget allows selection between a number of mutually exclusive values. When one radio button in a group is selected, the other radio buttons in the group cease to be selected. The values are of type T, the type parameter of the radio class. Enums are commonly used for this purpose.

The radio relies on groupRegistry to maintains the state for selection. If use in conjunction with a RadioGroup widget, use RadioGroup.maybeOf to get the group registry from the context.

If enabled is false, the radio will not be interactive.

See also:

• Radio, which uses this widget to build a Material styled radio button.
• CupertinoRadio, which uses this widget to build a Cupertino styled radio button.