StatelessJuiceWidget<TBloc extends JuiceBloc<BlocState> > class
abstract
Base class for creating stateless widgets that reactively respond to Juice bloc state changes.
StatelessJuiceWidget provides a structured way to build widgets that depend on a single bloc's state, with support for selective rebuilding through groups and lifecycle management.
Type Parameters:
TBloc- The type of bloc this widget observes
Example:
class CounterDisplay extends StatelessJuiceWidget<CounterBloc> {
CounterDisplay({super.key, super.groups = const {"counter"}});
@override
Widget onBuild(BuildContext context, StreamStatus status) {
return Text(
'Count: ${bloc.state.count}',
style: Theme.of(context).textTheme.headline4,
);
}
}
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- StatelessJuiceWidget
Constructors
-
StatelessJuiceWidget({Key? key, BlocDependencyResolver? resolver, Set<
String> groups = const {"*"}, Object? scope}) - Creates a StatelessJuiceWidget with optional resolver and rebuild groups.
Properties
- bloc → TBloc
-
The bloc instance this widget observes.
no setter
-
groups
→ Set<
String> -
Groups that control when this widget rebuilds.
Default
{'*'}rebuilds on emissions sent to EVERY widget (rebuildAlways, which is also what an emit withoutgroupsToRebuildsends) — NOT on emissions targeted at named groups. Name the groups this widget shows to rebuild on those. This set is unmodifiable to preserve widget immutability.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
- scope → Object?
-
Optional scope key for resolving scoped bloc instances.
final
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
close(
BuildContext context) → Widget - Called when the bloc stream is closed. Override to handle cleanup or show final UI state.
-
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
-
onBuild(
BuildContext context, StreamStatus< BlocState> status) → Widget - Main build method to override. Constructs widget UI based on current status.
-
onInit(
) → void - Called when the widget is first initialized. Override to add initialization logic.
-
onStateChange(
StreamStatus< BlocState> status) → bool - Called for each state change to determine if widget should rebuild. Return false to prevent rebuild for this state change.
-
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