RadioListTile<T> class

A ListTile with a Radio. In other words, a radio button with a label.

The entire list tile is interactive: tapping anywhere in the tile selects the radio button.

The value, groupValue, onChanged, and activeColor properties of this widget are identical to the similarly-named properties on the Radio widget. The type parameter T serves the same purpose as that of the Radio class' type parameter.

The title, subtitle, isThreeLine, and dense properties are like those of the same name on ListTile.

The selected property on this widget is similar to the ListTile.selected property, but the color used is that described by activeColor, if any, defaulting to the accent color of the current Theme. No effort is made to coordinate the selected state and the checked state; to have the list tile appear selected when the radio button is the selected radio button, set selected to true when value matches groupValue.

The radio button is shown on the left by default in left-to-right languages (i.e. the leading edge). This can be changed using controlAffinity. The secondary widget is placed on the opposite side. This maps to the ListTile.leading and ListTile.trailing properties of ListTile.

To show the RadioListTile as disabled, pass null as the onChanged callback.

This widget shows a pair of radio buttons that control the _character field. The field is of the type SingingCharacter, an enum.

// At the top level:
enum SingingCharacter { lafayette, jefferson }

// In the State of a stateful widget:
SingingCharacter _character = SingingCharacter.lafayette;

// In the build function of that State:
Column(
  children: <Widget>[
    RadioListTile<SingingCharacter>(
      title: const Text('Lafayette'),
      value: SingingCharacter.lafayette,
      groupValue: _character,
      onChanged: (SingingCharacter value) { setState(() { _character = value; }); },
    ),
    RadioListTile<SingingCharacter>(
      title: const Text('Thomas Jefferson'),
      value: SingingCharacter.jefferson,
      groupValue: _character,
      onChanged: (SingingCharacter value) { setState(() { _character = value; }); },
    ),
  ],
)

Constructors

RadioListTile({Key key, @required T value, @required T groupValue, @required ValueChanged<T> onChanged, Color activeColor, Widget title, Widget subtitle, bool isThreeLine: false, bool dense, Widget secondary, bool selected: false, ListTileControlAffinity controlAffinity: ListTileControlAffinity.platform }): Creates a combination of a list tile and a radio button. [...]
const

Properties

activeColor → Color: The color to use when this radio button is selected. [...]
final
checked → bool: Whether this radio button is checked. [...]
read-only
controlAffinity → ListTileControlAffinity: Where to place the control relative to the text.
final
dense → bool: Whether this list tile is part of a vertically dense list. [...]
final
groupValue → T: The currently selected value for this group of radio buttons. [...]
final
isThreeLine → bool: Whether this list tile is intended to display three lines of text. [...]
final
onChanged → ValueChanged<T>: Called when the user selects this radio button. [...]
final
secondary → Widget: A widget to display on the opposite side of the tile from the radio button. [...]
final
selected → bool: Whether to render icons and text in the activeColor. [...]
final
subtitle → Widget: Additional content displayed below the title. [...]
final
title → Widget: The primary content of the list tile. [...]
final
value → T: The value represented by this radio button.
final
hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget. [...]
override
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree. [...]
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent 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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns a string representation of this object.
inherited
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → 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

Operators

operator ==(dynamic other) → bool: The equality operator. [...]
inherited

material library

RadioListTile<T> class

Constructors

Properties

Methods

Operators