Observer class

An experimental widget that observes reactive changes.

This widget automatically tracks reactive variables used in its builder and rebuilds when they change.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• ObxStatelessWidget
• Observer

Available extensions

• AnimationExtension

Constructors

Observer({Key? key, required WidgetBuilder builder})

const

Properties

builder → WidgetBuilder

Builder function that creates the widget tree.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

blur({double begin = 0, double end = 15, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Blurs the widget from begin to end sigma factor.

bounce({required double begin, required double end, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Bounces the scale of the widget from begin to end.

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

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

fadeIn({Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Animates the widget's opacity from 0.0 to 1.0.

fadeOut({Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Animates the widget's opacity from 1.0 to 0.0.

flip({double begin = 0, double end = 1, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Flips the widget around the Y-axis from begin to end.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

rotate({required double begin, required double end, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Rotates the widget from begin to end angle in radians.

scale({required double begin, required double end, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Scales the widget from begin to end factor.

size({required double begin, required double end, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Animates the widget's layout size/scale from begin to end.

slide({required OffsetBuilder offset, double begin = 0, double end = 1, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Translates/slides the widget dynamically using an offset builder.

spin({Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Spins the widget 360 degrees.

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, int wrapWidth = 65}) → 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

wave({double begin = 0, double end = 1, Duration duration = _defaultDuration, Duration delay = _defaultDelay, ValueSetter<AnimationController>? onComplete, bool isSequential = false}) → GetAnimatedBuilder

Available on Widget, provided by the AnimationExtension extension

Animates the widget with a translation wave on the Y-axis.

Operators

operator ==(Object other) → bool

The equality operator.

inherited