ProxyProvider6<T, T2, T3, T4, T5, T6, R> class

A provider that builds a value based on other providers.

The exposed value is built through either create or update, then passed to InheritedProvider.

As opposed to create, update may be called more than once. It will be called once the first time the value is obtained, then once whenever ProxyProvider rebuilds or when one of the providers it depends on updates.

ProxyProvider comes in different variants such as ProxyProvider2. This is syntax sugar on the top of ProxyProvider0.

As such, ProxyProvider<A, Result> is equal to:

ProxyProvider0<Result>(
  update: (context, result) {
    final a = Provider.of<A>(context);
    return update(context, a, result);
  }
);

Whereas ProxyProvider2<A, B, Result> is equal to:

ProxyProvider0<Result>(
  update: (context, result) {
    final a = Provider.of<A>(context);
    final b = Provider.of<B>(context);
    return update(context, a, b, result);
  }
);

This last parameter of update is the last value returned by either create or update. It is null by default.

update must not be null.

Constructors

ProxyProvider6({Key? key, Create<R>? create, required ProxyProviderBuilder6<T, T2, T3, T4, T5, T6, R> update, UpdateShouldNotify<R>? updateShouldNotify, Dispose<R>? dispose, bool? lazy, TransitionBuilder? builder, Widget? child}): Initializes key for subclasses.

Properties

builder → TransitionBuilder?: Syntax sugar for obtaining a BuildContext that can read the provider created.
finalinherited
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

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
inherited
buildWithChild(BuildContext context, Widget? child) → Widget: A build method that receives an extra child parameter.
inherited
createElement() → _InheritedProviderElement<R>: 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

ProxyProvider6<T, T2, T3, T4, T5, T6, R> class

Constructors

Properties

Methods

Operators

provider library