BlocScope<T extends IStateObservable<Object?> > class
Takes a Create function that is responsible for
creating the Bloc and a child which will have access
to the instance via BlocScope.of(context)
.
It is used as a dependency injection (DI) widget so that a single instance
of a Bloc can be provided to multiple widgets within a subtree.
BlocScope(
create: (BuildContext context) => BlocA(),
child: ChildA(),
);
It automatically handles closing the instance when used with Create. By default, Create is called only when the instance is accessed.
BlocScope(
create: (BuildContext context) => BlocA(),
child: ChildA(),
);
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- BlocScope
Constructors
-
BlocScope.create({required Create<
T> create, Widget? child, Key? key}) -
Takes a Create function that is responsible for
creating the Bloc and a child which will have access
to the instance via
BlocScope.of(context)
. It is used as a dependency injection (DI) widget so that a single instance of a Bloc can be provided to multiple widgets within a subtree. - BlocScope.value({required T value, Widget? child, Key? key})
-
Takes a
value
and a child which will have access to thevalue
viaBlocScope.of(context)
. WhenBlocScope.value
is used, the Bloc will not be automatically closed. As a result,BlocScope.value
should only be used for providing existing instances to new subtrees.
Properties
- child → Widget?
-
Widget which will have access to the Bloc.
final
- 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.
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.
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}) → 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
Static Methods
-
of<
T extends IStateObservable< (Object?> >BuildContext context, {bool listen = true}) → T -
Method that allows widgets to access a Bloc instance
as long as their
BuildContext
contains a BlocScope instance.