ReduxSelector<St, Model> class
This widget will obtain the AsyncRedux store, state and dispatch method from its ancestors, and pass them to the builder. It will also prevent unnecessary widget rebuilds. To that end, the selector should return a "model" object, and the widget will rebuild only when that model changes. The model will also be available in the builder.
If the returned model is a List, then the widget will rebuild only when any of the list items change.
For more info, see https://pub.dev/documentation/provider/latest/provider/Selector-class.html
Example:
Widget build(BuildContext context) =>
ReduxSelector<AppState, dynamic>(
selector: (context, state) => [state.counter, state.description],
builder: (context, store, state, dispatch, model, child) =>
Scaffold(
appBar: AppBar(title: Text('Increment Example')),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text("You've pushed the button:"),
Text('${state.counter}', style: TextStyle(fontSize: 30)),
Text('${state.description}', style: TextStyle(fontSize: 15)),
])),
floatingActionButton: FloatingActionButton(
onPressed: () => dispatch(IncrementAndGetDescriptionAction()),
child: Icon(Icons.add),
)));
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- SingleChildStatefulWidget
- ReduxSelector
Constructors
-
ReduxSelector({Key? key, required Widget builder(BuildContext context, Store<
St> store, St state, Dispatch dispatch, Model model, Widget? child), required Model selector(BuildContext, St), Widget? child})
Properties
-
builder
→ Widget Function(BuildContext context, Store<
St> store, St state, Dispatch dispatch, Model model, Widget? child) -
A function that builds a widget tree from
child
and the last result of selector.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
-
selector
→ Create<
Model> -
A function that obtains some InheritedWidget and map their content into
a new object with only a limited number of properties.
finalinherited
Methods
-
createElement(
) → SingleChildStatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → _Selector0State< St, Model> -
Creates the mutable state for this widget at a given 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