Tween

Paquete	mx.effects
Clase	public class Tween
Herencia	Tween EventDispatcher Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Desde Flex 4.0, Adobe recomienda la utilización de la clase spark.effects.animation.Animation como una alternativa a esta clase.

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.

Elementos de API relacionados

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

Propiedades públicas

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	Propiedad		Definido por
		constructor : Object Una referencia a la clase de objeto o función constructora para una instancia de objeto determinada.	Object
		duration : Number = 3000 Duration of the animation, in milliseconds.	Tween
		easingFunction : Function [solo escritura] Sets the easing function for the animation.	Tween
		listener : Object Object that is notified at each interval of the animation.	Tween

Métodos públicos

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	Método		Definido por
		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 Registra un objeto de detector de eventos con un objeto EventDispatcher, de modo que el detector reciba la notificación de un evento.	EventDispatcher
		dispatchEvent(event:Event):Boolean Distribuye un evento en el flujo del evento.	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 Comprueba si el objeto EventDispatcher tiene detectores registrados para un tipo concreto de evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica si un objeto tiene definida una propiedad especificada.	Object
		isPrototypeOf(theClass:Object):Boolean Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.	Object
		pause():void Pauses the effect until you call the resume() method.	Tween
		propertyIsEnumerable(name:String):Boolean Indica si existe la propiedad especificada y si es enumerable.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Elimina un detector del objeto EventDispatcher.	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 Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.	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 Devuelve la representación de cadena de este objeto, con formato según las convenciones específicas de configuración regional.	Object
		toString():String Devuelve la representación de cadena del objeto especificado.	Object
		valueOf():Object Devuelve el valor simple del objeto especificado.	Object
		willTrigger(type:String):Boolean Comprueba si hay registrado un detector de eventos con este objeto EventDispatcher o con cualquiera de sus ascendientes para el tipo de evento concreto.	EventDispatcher

Eventos

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	Evento		Resumen	Definido por
		activate	[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.	EventDispatcher
		deactivate	[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.	EventDispatcher

Información sobre propiedades

duration

propiedad

public var duration:Number = 3000

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Duration of the animation, in milliseconds.

easingFunction

propiedad

easingFunction:Function [solo escritura]

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

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.

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

listener

propiedad

public var listener:Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Object that is notified at each interval of the animation.

Información sobre constructores

()

Información sobre

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

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Constructor.

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

Parámetros

	`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()`

Información sobre métodos

endTween

()

método

public function endTween():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

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

pause

()

método

public function pause():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

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

resume

()

método

public function resume():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

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

reverse

()

método

public function reverse():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

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

seek

()

método

public function seek(playheadTime:Number):void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

Flash Player 9, AIR 1.1

Advances the tween effect to the specified position.

Parámetros

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

setTweenHandlers

()

método

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

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

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.

Parámetros

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

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

stop

()

método

public function stop():void

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

Flex 3

Versiones de motor de ejecución:

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

Clases x

duration

easingFunction

listener

Tween

endTween

pause

resume

reverse

seek

setTweenHandlers

stop