Binder<T> class

An inherited widget that updates its dependents when the controller sends notifications.

Inheritance

• Object
• DiagnosticableTree
• Widget
• ProxyWidget
• InheritedWidget
• Binder

Constructors

Binder({required Widget child, Key? key, InitBuilder<T>? init, InstanceCreateBuilderCallback? create, bool global = true, bool autoRemove = true, bool assignId = false, bool lazy = true, void initState(BindElement<T> state)?, Object filter(T value)?, String? tag, dynamic dispose(BindElement<T> state)?, Object? id, dynamic didChangeDependencies(BindElement<T> state)?, void didUpdateWidget(Binder<T> oldWidget, BindElement<T> state)?})

Creates an inherited widget that updates its dependents when controller sends notifications.

const

Properties

assignId → bool

Flag indicating whether an identifier should be assigned to the widget.

final

autoRemove → bool

Flag indicating whether the widget should be automatically removed when disposed.

final

child → Widget

The widget below this widget in the tree.

final, inherited

create → InstanceCreateBuilderCallback?

Function to create an instance of the controller.

final

didChangeDependencies → dynamic Function(BindElement<T> state)?

Callback function that is called when the widget's dependencies change.

final

didUpdateWidget → void Function(Binder<T> oldWidget, BindElement<T> state)?

Callback function that is called when the widget is updated.

final

dispose → dynamic Function(BindElement<T> state)?

Callback function that is called when the widget is disposed.

final

filter → Object Function(T value)?

Function to filter the value of the controller.

final

global → bool

Flag indicating whether the controller should be treated as global.

final

hashCode → int

The hash code for this object.

no setter, inherited

id → Object?

Identifier for the widget.

final

init → InitBuilder<T>?

Function to initialize the controller.

final

initState → void Function(BindElement<T> state)?

Callback function that is called when the widget is initialized.

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

lazy → bool

Flag indicating whether the binding should be lazy.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

tag → String?

Tag for the widget.

final

Methods

createElement() → InheritedElement

Inflates this configuration to a concrete instance.

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

updateShouldNotify(covariant Binder<T> oldWidget) → bool

Whether the framework should notify widgets that inherit from this widget.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited