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

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• ValueBuilder

Available extensions

• WidgetMarginX
• WidgetPaddingX
• WidgetSliverBoxX

Constructors

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

const

Properties

builder → ValueBuilderBuilder<T>

final

hashCode → int

The hash code for this object.

no setter, inherited

initialValue → T?

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

onDispose → void Function()?

final

onUpdate → void Function(T)?

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

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