CustomAnimation<T> class

Widget that creates a customized animation.

You need to specify a tween that describes your animation and builder function that is called each frame you are animating. This function has signature of AnimatedWidgetBuilder.

It's also useful to specify a duration (default is 1 second).

You can modify the internal AnimationController by setting the control property to any value of [CustomAnimationControl). By default it starts playing the animation.

Nice to know: both duration and control can be modified at any time while using it inside a stateful widget.

To improve the performance of your animation you should put all widgets that are not effected by the animation into the child property. You get that child widget passed into the builder function. See also AnimatedWidgetBuilder.

If you specify a delay the animation will wait for the given duration until it will started animating.

The curve parameter can be used to apply a non-linear animation to your tween.

The callbacks onStart and onComplete can be used to track the start and end of an animation.

If you want to start your animation at alternative position, you can set a startPosition that takes values between 0.0 (start) and 1.0 (end).

You can optionally limit the framerate (fps) of the animation by setting the fps value.

You can provide an animationStatusListener that gets called by the internal AnimationController. It's receives events of the type AnimationStatus.

If you work with multiple animation widgets that are conditionally rendered, you might want to set a key. Otherwise Flutter will recycled your "old animation" which results in strange behavior.

You can connect this widget to the closest AnimationDeveloperTools by setting developerMode to true.

Inheritance

Constructors

CustomAnimation({required AnimatedWidgetBuilder<T> builder, required Animatable<T> tween, CustomAnimationControl control = CustomAnimationControl.play, Curve curve = Curves.linear, Duration duration = const Duration(seconds: 1), Duration delay = Duration.zero, double startPosition = 0.0, Widget? child, AnimationStatusListener? animationStatusListener, int? fps, bool developerMode = false, VoidCallback? onStart, VoidCallback? onComplete, Key? key})
Creates a new CustomAnimation widget. See class documentation for more information.
const

Properties

animationStatusListener → AnimationStatusListener?
final
builder → AnimatedWidgetBuilder<T>
final
child → Widget?
final
control → CustomAnimationControl
final
curve → Curve
final
delay → Duration
final
developerMode → bool
final
duration → Duration
final
fps → int?
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onComplete → VoidCallback?
final
onStart → VoidCallback?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
startPosition → double
final
tween → Animatable<T>
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _CustomAnimationState<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