DefaultTabController class

The TabController for descendant widgets that don't specify one explicitly.

Learn more about DefaultTabController on the Flutter YouTube channel.

DefaultTabController is an inherited widget that is used to share a TabController with a TabBar or a TabBarView. It's used when sharing an explicitly created TabController isn't convenient because the tab bar widgets are created by a stateless parent widget or by different parent widgets.

class MyDemo extends StatelessWidget {
  const MyDemo({super.key});

  static const List<Tab> myTabs = <Tab>[
    Tab(text: 'LEFT'),
    Tab(text: 'RIGHT'),
  ];

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: myTabs.length,
      child: Scaffold(
        appBar: AppBar(
          bottom: const TabBar(
            tabs: myTabs,
          ),
        ),
        body: TabBarView(
          children: myTabs.map((Tab tab) {
            final String label = tab.text!.toLowerCase();
            return Center(
              child: Text(
                'This is the $label tab',
                style: const TextStyle(fontSize: 36),
              ),
            );
          }).toList(),
        ),
      ),
    );
  }
}

Inheritance

Constructors

DefaultTabController({Key? key, required int length, int initialIndex = 0, required Widget child, Duration? animationDuration}): Creates a default tab controller for the given child widget.
const

Properties

animationDuration → Duration?: Controls the duration of DefaultTabController and TabBarView animations.
final
child → Widget: The widget below this widget in the tree.
final
hashCode → int: The hash code for this object.
no setterinherited
initialIndex → int: The initial index of the selected tab.
final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
length → int: The total number of tabs.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<DefaultTabController>: Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent 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 DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → 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 ==(Object other) → bool: The equality operator.
inherited

Static Methods

maybeOf(BuildContext context) → TabController?: The closest instance of DefaultTabController that encloses the given context, or null if none is found.
of(BuildContext context) → TabController: The closest instance of DefaultTabController that encloses the given context.