AnimationSpec class Animation

Specification for animating state changes.

You select the type of animation you want through the constructor you use to create the AnimationSpec.

const AnimationSpec() uses uses defaultCurve and defaultDuration.
AnimationSpec.curve animates with a Curve over a fixed Duration.

Any AnimationSpec instance can be refined by calling one of the modifiers. A modifier returns a new AnimationSpec instance:

To apply an AnimationSpec to a state change, use Animated, withAnimation or AnimatingStateMixin.

Examples

Create an AnimationSpec with modifiers:

import 'package:flutter/animation.dart';

final animation = AnimationSpec.curve(Curves.ease, 300.ms)
    .delay(250.s)
    .repeat(2)
    .speed(2.0);

Mixed in types

Diagnosticable

Annotations

@immutable

Constructors

AnimationSpec(): Default animation which uses defaultCurve and defaultDuration.
const
AnimationSpec.curve(Curve curve, [Duration duration = defaultDuration]): Animation which uses a curve and animates for a fixed duration.

Properties

hashCode → int: The hash code for this object.
no setteroverride
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
override
delay(Duration delay) → AnimationSpec: Returns a copy of this AnimationSpec which will start animating after the given delay.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
repeat(int count, {bool reverse = true}) → AnimationSpec: Returns a copy of this AnimationSpec which repeats count times.
repeatForever({bool reverse = true}) → AnimationSpec: Returns a copy of this AnimationSpec which repeats forever.
speed(double speed) → AnimationSpec: Returns a copy of this AnimationSpec with the given speed.
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
toStringShort() → String: A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
override

Constants

defaultCurve → const Curve: The default Curve used for animations, when no curve is specified.
defaultDuration → const Duration: The default duration used for animations, when no duration is specified.