ParentState<T extends StateController<StateWidget<State<StatefulWidget>>>> class abstract

Convenience widget to read a StateController higher up the tree.

ParentState widgets do not create their own StateController; instead, they read the nearest ancestor StateWidget of the desired controller type and expose it via the state getter. This is handy for composing helper widgets that still need to call controller methods.

class CounterActions extends ParentState<CounterController> {
  const CounterActions({super.key});

  @override
  Widget build(BuildContext context) {
    return IconButton(
      icon: const Icon(Icons.add),
      onPressed: state.increment,
    );
  }
}

Stateless widget that reads a controller from the ancestor tree.

Inheritance
Mixed-in types

Constructors

ParentState({Key? key})
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
state → T
Provides the nearest ancestor StateController<T>.
no setterinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
inherited
createElement() → ParentStateElement<StateController<StateWidget<State<StatefulWidget>>>>
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.
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