ValueBuilder<T> class

Example:

ValueBuilder<T>(
  initial: T,
  builder: (BuildContext context, T value, ValueCallback<T> update) {

  return (你需要局部刷新的组件)

  }),
  onUpdate: (value) => print("Value updated: $value"),
),
Inheritance
Available Extensions

Constructors

ValueBuilder({Key? key, required ValueBuilderCallback<T> builder, T? initial, ValueCallback<T?>? onUpdate, ValueCallback<BuildContext>? initState, ValueCallback<BuildContext>? didChangeDependencies, ValueCallback<BuildContext>? didUpdateWidget, ValueCallback<BuildContext>? deactivate, ValueCallback<BuildContext>? dispose})
const

Properties

builder → ValueBuilderCallback<T>
builder
final
deactivate → ValueCallback<BuildContext>?
deactivate
finalinherited
didChangeDependencies → ValueCallback<BuildContext>?
didChangeDependencies
finalinherited
didUpdateWidget → ValueCallback<BuildContext>?
didUpdateWidget
finalinherited
dispose → ValueCallback<BuildContext>?
dispose
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
initial → T?
final
initState → ValueCallback<BuildContext>?
initState
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onUpdate → ValueCallback<T?>?
onUpdate
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() → State<ValueBuilder<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