Provide<T> class

A widget that obtains the given value from the nearest provider and rebuilds using the builder whenever it changes.

Either the provider or the value must implement Listenable. To obtain a value without listening to changes, the static Provide.value<T> function should be used instead.

To improve performance by having less rebuilds, the part of the tree rebuilt by builder should be minimized by putting as much of the tree in child as possible, or using the static function. If no scope is provided, the default one will be used.

Inheritance

Constructors

Provide({@required ValueBuilder<T> builder, Widget child, ProviderScope scope})
Constructor.
const

Properties

builder ValueBuilder<T>
Called whenever there is a change.
final
child Widget
The part of the widget tree not rebuilt on change.
final
scope ProviderScope
The scope from which the type is requested
final
hashCode → int
The hash code for this object.
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

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
override
createElement() StatelessElement
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.
@protected, inherited
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.debug}) → String
Returns 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

Operators

operator ==(dynamic other) → bool
The equality operator.
inherited

Static Methods

stream<T>(BuildContext context, {ProviderScope scope}) → Stream<T>
Used to obtain provided values in the form of a stream that sends its value on change.
value<T>(BuildContext context, {ProviderScope scope}) → T
Used to obtain provided values without listening to their changes.