ListenableProxyProvider2<T, T2, R extends Listenable?> class Null safety

A variation of ListenableProvider that builds its value from values obtained from other providers.

See the discussion on ChangeNotifierProxyProvider for a complete explanation on how to use it.

ChangeNotifierProxyProvider extends ListenableProxyProvider to make it work with ChangeNotifier, but the behavior stays the same. Most of the time you'll want to use ChangeNotifierProxyProvider instead. But ListenableProxyProvider is exposed in case someone wants to use a Listenable implementation other than ChangeNotifier, such as Animation.



ListenableProxyProvider2({Key? key, Create<R>? create, required ProxyProviderBuilder2<T, T2, R> update, Dispose<R>? dispose, bool? lazy, TransitionBuilder? builder, Widget? child})
Initializes key for subclasses.


builder TransitionBuilder?
Syntax sugar for obtaining a BuildContext that can read the provider created. [...]
final, inherited
hashCode int
The hash code for this object. [...]
@nonVirtual, 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


build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
buildWithChild(BuildContext context, Widget? child) Widget
A build method that receives an extra child parameter. [...]
createElement() → _InheritedProviderElement<R>
Creates a StatelessElement to manage this widget's location in the tree. [...]
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. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep. [...]
toString({DiagnosticLevel minLevel =}) String
A string representation of this object. [...]
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object. [...]
toStringShort() String
A short, textual description of this widget.


operator ==(Object other) bool
The equality operator. [...]
@nonVirtual, inherited