Packagemx.effects.effectClasses
Classpublic class TweenEffectInstance
InheritanceTweenEffectInstance Inheritance EffectInstance Inheritance flash.events.EventDispatcher
SubclassesAnimatePropertyInstance, BlurInstance, DissolveInstance, FadeInstance, GlowInstance, MoveInstance, PauseInstance, ResizeInstance, RotateInstance, ZoomInstance

The TweenEffectInstance class implements the instance class for the TweenEffect. Flex creates an instance of this class when it plays a TweenEffect; you do not create one yourself.

See also

mx.effects.Tween
mx.effects.TweenEffect


Public Properties
 PropertyDefined by
 InheritedclassName : String
The name of the effect class, such as "FadeInstance".
EffectInstance
 Inheritedduration : Number
The duration of the effect, in milliseconds.
EffectInstance
  easingFunction : Function
The easing function for the animation.
TweenEffectInstance
 Inheritedeffect : IEffect
The IEffect object that created this IEffectInstance object.
EffectInstance
 InheritedeffectTargetHost : IEffectTargetHost
A property that lets you access the target list-based control of a data effect.
EffectInstance
 InheritedhideFocusRing : Boolean
Determines whether the effect should hide the focus ring when starting the effect.
EffectInstance
  playheadTime : Number
[read-only] The current position of the effect, in milliseconds.
TweenEffectInstance
 InheritedpropertyChanges : PropertyChanges
Specifies the PropertyChanges object containing the start and end values for the set of properties relevant to the effect's targets.
EffectInstance
 InheritedrepeatCount : int
Number of times to repeat the effect.
EffectInstance
 InheritedrepeatDelay : int
Amount of time, in milliseconds, to wait before repeating the effect.
EffectInstance
 InheritedstartDelay : int
Amount of time, in milliseconds, to wait before starting the effect.
EffectInstance
 InheritedsuspendBackgroundProcessing : Boolean
If true, blocks all background processing while the effect is playing.
EffectInstance
 Inheritedtarget : Object
The UIComponent object to which this effect is applied.
EffectInstance
 InheritedtriggerEvent : Event
The event, if any, which triggered the playing of the effect.
EffectInstance
  tween : Tween
The Tween object, which determines the animation.
TweenEffectInstance
Public Methods
 MethodDefined by
  
TweenEffectInstance(target:Object)
Constructor.
TweenEffectInstance
  
end():void
Interrupts an effect that is currently playing, and immediately jumps to the end of the effect.
TweenEffectInstance
 Inherited
finishEffect():void
Called by the end() method when the effect finishes playing.
EffectInstance
 Inherited
finishRepeat():void
Called after each iteration of a repeated effect finishes playing.
EffectInstance
 Inherited
initEffect(event:Event):void
This method is called if the effect was triggered by the EffectManager.
EffectInstance
  
onTweenEnd(value:Object):void
Callback method that is called when the target should be updated by the effect for the last time.
TweenEffectInstance
  
onTweenUpdate(value:Object):void
Callback method that is called when the target should be updated by the effect.
TweenEffectInstance
 Inherited
pause():void
Pauses the effect until you call the resume() method.
EffectInstance
 Inherited
play():void
Plays the effect instance on the target.
EffectInstance
 Inherited
resume():void
Resumes the effect after it has been paused by a call to the pause() method.
EffectInstance
 Inherited
reverse():void
Plays the effect in reverse, starting from the current position of the effect.
EffectInstance
  
seek(playheadTime:Number):void
Advances the effect to the specified position.
TweenEffectInstance
 Inherited
startEffect():void
Plays the effect instance on the target after the startDelay period has elapsed.
EffectInstance
 Inherited
stop():void
Stops the effect, leaving the target in its current state.
EffectInstance
Protected Methods
 MethodDefined by
  
createTween(listener:Object, startValue:Object, endValue:Object, duration:Number = -1, minFps:Number = -1):Tween
Creates a Tween instance, assigns it the start, end, and duration values.
TweenEffectInstance
Property detail
easingFunctionproperty
public var easingFunction:Function

The easing function for the animation. By default, effects use the same easing function as the TweenEffect class.

See also

playheadTimeproperty 
playheadTime:Number  [read-only]

The current position of the effect, in milliseconds. This value is between 0 and the value of the duration property. Use the seek() method to change the position of the effect.

Implementation
    public function get playheadTime():Number
tweenproperty 
public var tween:Tween

The Tween object, which determines the animation. To create an effect, you must create a Tween instance in the override of the EffectInstance.play() method and assign it to the tween property. Use the createTween() method to create your Tween object.

Constructor detail
TweenEffectInstance()constructor
public function TweenEffectInstance(target:Object)

Constructor.

Parameters
target:Object — The Object to animate with this effect.
Method detail
createTween()method
protected function createTween(listener:Object, startValue:Object, endValue:Object, duration:Number = -1, minFps:Number = -1):Tween

Creates a Tween instance, assigns it the start, end, and duration values. If an easing function has been specified, then it is assigned to the Tween instance. The Tween instance is assigned event listeners for the TweenEvents: tweenStart, tweenUpdate, and tweenEnd. Typically, you call this method from your override of the EffectInstance.play() method which effectively starts the animation timer.

Parameters
listener:Object — Object that is notified at each interval of the animation. You typically pass the this keyword as the value. The listener must define the onTweenUpdate() method and optionally the onTweenEnd() method. The onTweenUpdate() method is invoked for each interval of the animation, and the onTweenEnd() method is invoked just after the animation finishes.
 
startValue:Object — Initial value(s) of the animation. Either a number or an Array of numbers. If a number is passed, the Tween interpolates between this number and the number passed in the endValue parameter. If an Array of numbers is passed, each number in the Array is interpolated.
 
endValue:Object — Final value(s) of the animation. The type of this argument must match the startValue parameter.
 
duration:Number (default = -1) — Duration of the animation, in milliseconds.
 
minFps:Number (default = -1) — Minimum number of times that the onTweenUpdate() method should be called every second. The tween code tries to call the onTweenUpdate() method as frequently as possible (up to 100 times per second). However, if the frequency falls below minFps, the duration of the animation automatically increases. As a result, an animation that temporarily freezes (because it is not getting any CPU cycles) begins again where it left off, instead of suddenly jumping ahead.

Returns
Tween — The newly created Tween instance.
end()method 
public override function end():void

Interrupts an effect that is currently playing, and immediately jumps to the end of the effect. Calls the Tween.endTween() method on the tween property. This method implements the method of the superclass.

If you create a subclass of TweenEffectInstance, you can optionally override this method.

The effect dispatches the effectEnd event.

See also

onTweenEnd()method 
public function onTweenEnd(value:Object):void

Callback method that is called when the target should be updated by the effect for the last time. The Tween class passes Tween.endValue as the value of the value argument. The value argument can be either a Number or an Array of Numbers.

Overriding this function is optional. You must also call the super version of this method from the end of your override, super.onTweenEnd(val), after your logic.

Parameters
value:Object — The value of the value argument is an interpolated value determined by the Tween.startValue property, Tween.endValue property, and interpolation function specified by the implementation of the effect in its play() method. The play() method uses these values to create a Tween object that plays the effect over a time period. The value argument can be either a Number or an Array of Numbers.
onTweenUpdate()method 
public function onTweenUpdate(value:Object):void

Callback method that is called when the target should be updated by the effect. The Tween class uses the easing function and the Tween.startValue, Tween.endValue and Tween.duration properties to calculate the value of the value argument. The value argument can be either a Number or an Array of Numbers.

All subclasses must override this method. It is not necessary to call the super version of this function when overriding this method.

Parameters
value:Object — The value of the value argument is an interpolated value determined by the Tween.startValue property, Tween.endValue property, and interpolation function specified by the implementation of the effect in its play() method. The play() method uses these values to create a Tween object that plays the effect over a time period. The value argument can be either a Number or an Array of Numbers.
seek()method 
public function seek(playheadTime:Number):void

Advances the effect to the specified position.

Parameters
playheadTime:Number — The position, in milliseconds, between 0 and the value of the duration property.