Selector0<T> class Null safety

A base class for custom Selector.

It works with any InheritedWidget. Variants like Selector and Selector6 are just syntax sugar to use Selector0 with Provider.of.

But it will not work with values coming from anything but InheritedWidget.

As such, the following:

T value;

return Selector0(
  selector: (_) => value,
  builder: ...,
)

will still call builder again, even if value didn't change.

Inheritance

Implementers

Constructors

Selector0({Key? key, required ValueWidgetBuilder<T> builder, required T selector(BuildContext), ShouldRebuild<T>? shouldRebuild, Widget? child}): Both builder and selector must not be null.

builder → ValueWidgetBuilder<T>: A function that builds a widget tree from child and the last result of selector.
final
hashCode → int: The hash code for this object.
@nonVirtualread-onlyinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited
selector → T Function(BuildContext): A function that obtains some InheritedWidget and map their content into a new object with only a limited number of properties.
final

createElement() → SingleChildStatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _Selector0State<T>: 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.
@protectedinherited
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 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}) → 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

operator ==(Object other) → bool: The equality operator.
@nonVirtualinherited