BlocBuilder<B extends Bloc, S> class
Widget that accept Bloc of type B
and subscribes on states stream of type S
.
If Bloc was not provided, so Provider.of uses by default. Function builder calls each time when new state was added to stream and returns Widget depending on state. precondition allow to filter stats that will be delivered to builder.
BlocBuilder<CounterBloc, int>(
bloc: CounterBloc(),
precondition: (prevCount, count) => count % 2 == 0,
builder: (_, count) => Text('$count');
)
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- BlocBuilder
Constructors
-
BlocBuilder({Key? key, B? bloc, required BlocWidgetBuilder<
S> builder, Precondition<S> ? precondition}) -
const
Properties
- bloc → B?
-
finalinherited
-
builder
→ BlocWidgetBuilder<
S> -
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
precondition
→ Precondition<
S> ? -
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< StatefulWidget> -
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.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