ValueBuilder<T> class

Manages a local state like ObxValue, but uses a callback instead of a Rx value.

Example:

 ValueBuilder<bool>(
   initialValue: false,
   builder: (value, update) => Switch(
   value: value,
   onChanged: (flag) {
      update(flag);
   },),
   onUpdate: (value) => print("Value updated: $value"),
 ),
Inheritance

Constructors

ValueBuilder({required T initialValue, required ValueBuilderBuilder<T> builder, Key? key, void onDispose()?, void onUpdate(T)?})
const

Properties

builder → ValueBuilderBuilder<T>
The builder function that constructs the widget based on the current value and an updater function.
final
hashCode → int
The hash code for this object.
no setterinherited
initialValue → T
The initial value of the state managed by the ValueBuilder.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onDispose → void Function()?
A function that is called when the ValueBuilder is disposed.
final
onUpdate → void Function(T)?
A function that is called when the value managed by the ValueBuilder is updated.
final
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() → ValueBuilderState<T>
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