ReactState<S, E> class

ReactState widget will react to system's whole state change, then trigger a build with widget builder.

API Overview

ReactState<int, CounterEvent>(
  system: _system,
  equals: (it1, it2) { // `equals` is used to determine if old state equals 
    return it1 == it2; // to new state. If there are not equal, then build
  },                   // is triggered. `equals` defaults to 
                       // `==` if omitted.                                
  builder: (context, state, dispatch) {
    return ...; // return widget based on state, required
  },
);

Usage Example:

Below code shown a counter example:

...

final System<int, CounterEvent> _system = ...; // store system somewhere

...

@override
Widget build(BuildContext context) {
  return ReactState<int, CounterEvent>(
    system: _system,
    builder: (context, state, dispatch) {
      return CounterPage(
        title: 'Use React Widget Page',
        count: state,
        onIncreasePressed: () => dispatch(Increment()),
      );
    },
  );
}
Inheritance

Constructors

ReactState({Key? key, required System<S, E> system, Equals<S>? equals, required WidgetBuilder<S, E> builder})
const

Properties

builder → WidgetBuilder<S, E>
finalinherited
equals → Equals<S>?
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
system → System<S, E>
finalinherited
value → S Function(S state)
finalinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<React<S, E, S>>
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