CompoundAnimation<T> class

An interface for combining multiple Animations. Subclasses need only implement the value getter to control how the child animations are combined. Can be chained to combine more than 2 animations.

For example, to create an animation that is the sum of two others, subclass this class and define T get value = first.value + second.value;

By default, the status of a CompoundAnimation is the status of the next animation if next is moving, and the status of the first animation otherwise.

Inheritance
Mixed in types
Implementers

Constructors

CompoundAnimation({@required Animation<T> first, @required Animation<T> next })
Creates a CompoundAnimation. Both arguments must be non-null. Either can be a CompoundAnimation itself to combine multiple animations.

Properties

first → Animation<T>
The first sub-animation. Its status takes precedence if neither are animating.
final
next → Animation<T>
The second sub-animation.
final
status → AnimationStatus
Gets the status of this animation based on the first and next status. [...]
read-only, override
hashCode → int
The hash code for this object. [...]
read-only, inherited
isCompleted → bool
Whether this animation is stopped at the end.
read-only, inherited
isDismissed → bool
Whether this animation is stopped at the beginning.
read-only, inherited
isListening → bool
Whether there are any listeners.
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
value → T
The current value of the animation.
read-only, inherited

Methods

didStartListening() → void
Called when the number of listeners changes from zero to one.
override
didStopListening() → void
Called when the number of listeners changes from one to zero.
override
toString() → String
Returns a string representation of this object.
override
addListener(VoidCallback listener) → void
Calls the listener every time the value of the animation changes. [...]
inherited
addStatusListener(AnimationStatusListener listener) → void
Calls listener every time the status of the animation changes. [...]
inherited
didRegisterListener() → void
Calls didStartListening every time a registration of a listener causes an empty list of listeners to become non-empty. [...]
inherited
didUnregisterListener() → void
Calls didStopListening when an only remaining listener is unregistered, thus making the list empty. [...]
inherited
drive<U>(Animatable<U> child) → Animation<U>
Chains a Tween (or CurveTween) to this Animation. [...]
@optionalTypeArgs, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
notifyListeners() → void
Calls all the listeners. [...]
inherited
notifyStatusListeners(AnimationStatus status) → void
Calls all the status listeners. [...]
inherited
removeListener(VoidCallback listener) → void
Stop calling the listener every time the value of the animation changes. [...]
inherited
removeStatusListener(AnimationStatusListener listener) → void
Stops calling the listener every time the status of the animation changes. [...]
inherited
toStringDetails() → String
Provides a string describing the status of this object, but not including information about the object itself. [...]
inherited

Operators

operator ==(dynamic other) → bool
The equality operator. [...]
inherited