A material design radio button.
Used to select 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 radio button itself does not maintain any state. Instead, when the state of the radio button changes, the widget calls the onChanged callback. Most widget that use a radio button will listen for the onChanged callback and rebuild the radio button with a new groupValue to update the visual appearance of the radio button.
Requires one of its ancestors to be a Material widget.
See also:
- Inheritance
- Object
- Widget
- StatefulWidget
- Radio
Constructors
- Radio({Key key, @required T value, @required T groupValue, @required ValueChanged<T> onChanged, Color activeColor })
-
Creates a material design radio button.
Properties
- activeColor → Color
-
The color to use when this radio button is selected.
read-only - groupValue → T
-
The currently selected value for this group of radio buttons.
read-only - onChanged → ValueChanged<T>
-
Called when the user selects this radio button.
read-only - value → T
-
The value represented by this radio button.
read-only - hashCode → int
-
Get a hash code for this object.
read-only, inherited - key → Key
-
Controls how one widget replaces another widget in the tree.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
createState(
) → _RadioState<T> -
Creates the mutable state for this widget at a given location in the tree.
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited -
debugFillDescription(
List<String> description) → void -
Add additional information to the given description for use by toString.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited -
toStringShort(
) → String -
A short, textual description of this widget.
inherited