ListeningBuilder class

Widget that rebuilds part of the widget tree whenever the listenable changes.

builder is called on listenable changing. child is not rebuilt, but is passed to the builder. This has identical behavior to AnimatedBuilder, but is clearer about intent.

Inheritance

Constructors

ListeningBuilder({@required Listenable listenable, @required TransitionBuilder builder, Key key, Widget child})
Constructs a new ListeningBuilder.
const

Properties

builder TransitionBuilder
Called every time the listenable changes value.
final
child Widget
The child widget to pass to the builder. [...]
final
hashCode → int
The hash code for this object.
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree.
final, inherited
listenable Listenable
The Listenable to which this widget is listening.
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

build(BuildContext context) Widget
Override this method to build widgets that depend on the state of the listenable (e.g., the current value of the animation).
override
createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _AnimatedState
Subclasses typically do not override this method.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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.debug}) → String
Returns 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 ==(dynamic other) → bool
The equality operator.
inherited