Tween

Paket	mx.effects
Klass	public class Tween
Arv	Tween EventDispatcher Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Med början från Flex 4.0, rekommenderar Adobe att du använder klassen spark.effects.animation.Animation som ett alternativ till den här klassen.

Tween is the underlying animation class for the effects in Flex 3. As of Flex 4, the Spark effects use the spark.effects.animation.Animation class to provide similar functionality.

The Tween class defines a tween, a property animation performed on a target object over a period of time. That animation can be a change in position, such as performed by the Move effect; a change in size, as performed by the Resize or Zoom effects; a change in visibility, as performed by the Fade or Dissolve effects; or other types of animations.

When defining tween effects, you typically create an instance of the Tween class within your override of the EffectInstance.play() method. A Tween instance accepts the startValue, endValue, and duration properties, and an optional easing function to define the animation.

The Tween object invokes the mx.effects.effectClasses.TweenEffectInstance.onTweenUpdate() callback function on a regular interval on the effect instance for the duration of the effect, passing to the onTweenUpdate() method an interpolated value between the startValue and endValue. Typically, the callback function updates some property of the target object, causing that object to animate over the duration of the effect.

When the effect ends, the Tween objects invokes the mx.effects.effectClasses.TweenEffectInstance.onTweenEnd() callback function, if you defined one.

Relaterade API-element

mx.effects.TweenEffect
mx.effects.effectClasses.TweenEffectInstance

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	Egenskap		Definieras med
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	Object
		duration : Number = 3000 Duration of the animation, in milliseconds.	Tween
		easingFunction : Function [lässkyddad] Sets the easing function for the animation.	Tween
		listener : Object Object that is notified at each interval of the animation.	Tween

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	Metod		Definieras med
		Tween(listener:Object, startValue:Object, endValue:Object, duration:Number = -1, minFps:Number = -1, updateFunction:Function = null, endFunction:Function = null) Constructor.	Tween
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser.	EventDispatcher
		dispatchEvent(event:Event):Boolean Skickar en händelse till händelseflödet.	EventDispatcher
		endTween():void Interrupt the tween, jump immediately to the end of the tween, and invoke the onTweenEnd() callback function.	Tween
		hasEventListener(type:String):Boolean Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse.	EventDispatcher
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		pause():void Pauses the effect until you call the resume() method.	Tween
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Tar bort en avlyssnare från EventDispatcher-objektet.	EventDispatcher
		resume():void Resumes the effect after it has been paused by a call to the pause() method.	Tween
		reverse():void Plays the effect in reverse, starting from the current position of the effect.	Tween
		seek(playheadTime:Number):void Advances the tween effect to the specified position.	Tween
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		setTweenHandlers(updateFunction:Function, endFunction:Function):void By default, the Tween class invokes the mx.effects.effectClasses.TweenEffectInstance.onTweenUpdate() callback function on a regular interval on the effect instance for the duration of the effect, and the optional mx.effects.effectClasses.TweenEffectInstance.onTweenEnd() callback function at the end of the effect duration.	Tween
		stop():void Stops the tween, ending it without dispatching an event or calling the Tween's endFunction or onTweenEnd().	Tween
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String Returnerar det angivna objektets strängbeteckning.	Object
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object
		willTrigger(type:String):Boolean Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen.	EventDispatcher

Händelser

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	Händelse		Sammanfattning	Definieras med
		activate	[utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt.	EventDispatcher
		deactivate	[utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt.	EventDispatcher

Egenskapsdetaljer

duration

egenskap

public var duration:Number = 3000

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Duration of the animation, in milliseconds.

easingFunction

egenskap

easingFunction:Function [lässkyddad]

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Sets the easing function for the animation. The easing function is used to interpolate between the startValue value and the endValue. A trivial easing function does linear interpolation, but more sophisticated easing functions create the illusion of acceleration and deceleration, which makes the animation seem more natural.

If no easing function is specified, an easing function based on the Math.sin() method is used.

The easing function follows the function signature popularized by Robert Penner. The function accepts four arguments. The first argument is the "current time", where the animation start time is 0. The second argument is a the initial value at the beginning of the animation (a Number). The third argument is the ending value minus the initial value. The fourth argument is the duration of the animation. The return value is the interpolated value for the current time (usually a value between the initial value and the ending value).

Flex includes a set of easing functions in the mx.effects.easing package.

Implementering
public function set easingFunction(value:Function):void

listener

egenskap

public var listener:Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Object that is notified at each interval of the animation.

Konstruktordetaljer

()

Konstruktor

public function Tween(listener:Object, startValue:Object, endValue:Object, duration:Number = -1, minFps:Number = -1, updateFunction:Function = null, endFunction:Function = null)

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Constructor.

When the constructor is called, the animation automatically starts playing.

Parametrar

	`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 former method is invoked for each interval of the animation, and the latter 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, expressed 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.

	`updateFunction:Function` (default = `null`) — Specifies an alternative update callback function to be used instead of `listener.OnTweenUpdate()`

	`endFunction:Function` (default = `null`) — Specifies an alternative end callback function to be used instead of `listener.OnTweenEnd()`

Metoddetaljer

endTween

()

metod

public function endTween():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Interrupt the tween, jump immediately to the end of the tween, and invoke the onTweenEnd() callback function.

pause

()

metod

public function pause():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Pauses the effect until you call the resume() method.

resume

()

metod

public function resume():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Resumes the effect after it has been paused by a call to the pause() method.

reverse

()

metod

public function reverse():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Plays the effect in reverse, starting from the current position of the effect.

seek

()

metod

public function seek(playheadTime:Number):void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Advances the tween effect to the specified position.

Parametrar

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

setTweenHandlers

()

metod

public function setTweenHandlers(updateFunction:Function, endFunction:Function):void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

By default, the Tween class invokes the mx.effects.effectClasses.TweenEffectInstance.onTweenUpdate() callback function on a regular interval on the effect instance for the duration of the effect, and the optional mx.effects.effectClasses.TweenEffectInstance.onTweenEnd() callback function at the end of the effect duration.

This method lets you specify different methods as the update and the end callback functions.

Parametrar

	`updateFunction:Function` — Specifies the update callback function.

	`endFunction:Function` — Specifies the end callback function.

stop

()

metod

public function stop():void

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Stops the tween, ending it without dispatching an event or calling the Tween's endFunction or onTweenEnd().

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Tween - AS3 Flex

Klasser x

duration

easingFunction

listener

Tween

endTween

pause

resume

reverse

seek

setTweenHandlers

stop