| Pacchetto | mx.effects |
| Classe | public class Tween |
| Ereditarietà | Tween  EventDispatcher Object |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
 | A partire da Flex 4.0, Adobe consiglia di utilizzare la classe spark.effects.animation.Animation come alternativa a questa classe. 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.
Elementi API correlati
Nascondi proprietà pubbliche ereditate
Mostra proprietà pubbliche ereditate| Proprietà | Definito da | ||
|---|---|---|---|
 | constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| duration : Number = 3000
Duration of the animation, in milliseconds. | Tween | ||
| easingFunction : Function [sola scrittura]
Sets the easing function for the animation. | Tween | ||
| listener : Object
Object that is notified at each interval of the animation. | Tween | ||
| Metodo | Definito da | ||
|---|---|---|---|
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 oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento. | EventDispatcher | |
|
Invia un evento nel flusso di eventi. | EventDispatcher | |
Interrupt the tween, jump immediately to the end of the tween,
and invoke the onTweenEnd() callback function. | Tween | ||
|
Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento. | EventDispatcher | |
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
Pauses the effect until you call the resume() method. | Tween | ||
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | |
Resumes the effect after it has been paused
by a call to the pause() method. | Tween | ||
Plays the effect in reverse,
starting from the current position of the effect. | Tween | ||
Advances the tween effect to the specified position. | Tween | ||
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
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 | ||
Stops the tween, ending it without dispatching an event or calling
the Tween's endFunction or onTweenEnd(). | Tween | ||
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
|
Restituisce la rappresentazione in formato stringa dell'oggetto specificato. | Object | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher | |
duration | proprietà |
public var duration:Number = 3000| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Duration of the animation, in milliseconds.
easingFunction | proprietà |
easingFunction:Function [sola scrittura] | Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | 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.
Implementazione
public function set easingFunction(value:Function):voidlistener | proprietà |
public var listener:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Object that is notified at each interval of the animation.
Tween | () | Funzione di costruzione |
public function Tween(listener:Object, startValue:Object, endValue:Object, duration:Number = -1, minFps:Number = -1, updateFunction:Function = null, endFunction:Function = null)| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor.
When the constructor is called, the animation automatically starts playing.
Parametrilistener: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) | |
minFps:Number (default = -1)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)listener.OnTweenUpdate()
| |
endFunction:Function (default = null)listener.OnTweenEnd()
|
endTween | () | metodo |
public function endTween():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Interrupt the tween, jump immediately to the end of the tween,
and invoke the onTweenEnd() callback function.
pause | () | metodo |
public function pause():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Pauses the effect until you call the resume() method.
resume | () | metodo |
public function resume():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Resumes the effect after it has been paused
by a call to the pause() method.
reverse | () | metodo |
public function reverse():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Plays the effect in reverse, starting from the current position of the effect.
seek | () | metodo |
public function seek(playheadTime:Number):void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Advances the tween effect to the specified position.
Parametri
playheadTime:Number — The position, in milliseconds, between 0
and the value of the duration property.
|
setTweenHandlers | () | metodo |
public function setTweenHandlers(updateFunction:Function, endFunction:Function):void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | 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.
Parametri
updateFunction:Function — Specifies the update callback function.
| |
endFunction:Function — Specifies the end callback function.
|
stop | () | metodo |
public function stop():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Stops the tween, ending it without dispatching an event or calling
the Tween's endFunction or onTweenEnd().
Tue Jun 12 2018, 02:44 PM Z