DurationElement

Paquete	org.osmf.elements
Clase	public class DurationElement
Herencia	DurationElement ProxyElement MediaElement EventDispatcher Object

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

OSMF 1.0

Versiones de motor de ejecución:

Flash Player 10, AIR 1.5

DurationElement is a media element that wraps a MediaElement to give it temporal capabilities. It allows a non-temporal MediaElement to be treated as a temporal MediaElement.

The DurationElement class is especially useful for creating delays in the presentation of a media composition. For example, the following code presents a sequence of videos, separated from each other by five-second delays.

     var sequence:SerialElement = new SerialElement();
     
     sequence.addChild(new VideoElement(new URLResource("http://www.example.com/video1.flv")));
     sequence.addChild(new DurationElement(5));
     sequence.addChild(new VideoElement(new URLResource("http://www.example.com/ad.flv")));
     sequence.addChild(new DurationElement(5));
     sequence.addChild(new VideoElement(new URLResource("http://www.example.com/video2.flv")));
     
     // Assign the SerialElement to the MediaPlayer.
     player.media = sequence;

The following example presents a sequence of rotating banners. The delays separating the appearances of the banners are created with DurationElements. In addition, the images themselves are wrapped in DurationElements to enable them to support a duration.

     // The first banner does not appear for five seconds.
     // Each banner is shown for 20 seconds.
     // There is a 15-second delay between images.
     
     var bannerSequence:SerialElement = new SerialElement();
     
     bannerSequence.addChild(new DurationElement(5));
     bannerSequence.addChild(new DurationElement(20,new ImageElement(new URLResource("http://www.example.com/banner1.jpg")));
     bannerSequence.addChild(new DurationElement(15));
     bannerSequence.addChild(new DurationElement(20,new ImageElement(new URLResource("http://www.example.com/banner2.jpg")));
     bannerSequence.addChild(new DurationElement(15));
     bannerSequence.addChild(new DurationElement(20,new ImageElement(new URLResource("http://www.example.com/banner3.jpg")));

The DurationElement will not work with elements that already have a TimeTrait, such as VideoElement. To specify a start and end time for a VideoElement. use StreamingURLResource's clipStartTime and clipEndTime properties.

Ver los ejemplos

Elementos de API relacionados

org.osmf.elements.ProxyElement
org.osmf.elements.SerialElement
org.osmf.net.StreamingURLResource

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
		container : IMediaContainer [solo lectura] The media container that this element uses.	MediaElement
		metadataNamespaceURLs : Vector.<String> [solo lectura] A Vector containing the namespace URLs for all Metadata objects stored within this MediaElement.	MediaElement
		proxiedElement : MediaElement The MediaElement for which this ProxyElement serves as a proxy, or wrapper.	ProxyElement
		resource : MediaResourceBase The media resource that this media element operates on.	MediaElement
		traitTypes : Vector.<String> [solo lectura] A Vector of MediaTraitType values representing the trait types on this media element.	MediaElement

Propiedades protegidas

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	Propiedad		Definido por
		blockedTraits : Vector.<String> The set of MediaTraitTypes that this ProxyElement will block.	ProxyElement

Métodos públicos

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	Método		Definido por
		DurationElement(duration:Number, mediaElement:MediaElement = null) Constructor.	DurationElement
		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
		addMetadata(namespaceURL:String, metadata:Metadata):void Adds a Metadata object to this MediaElement under the specified namespace URL.	MediaElement
		dispatchEvent(event:Event):Boolean Distribuye un evento en el flujo del evento.	EventDispatcher
		getMetadata(namespaceURL:String):Metadata Returns the Metadata object that is stored under this MediaElement with the specified namespace URL.	MediaElement
		getTrait(type:String):org.osmf.traits:MediaTraitBase Returns the media trait of the specified type.	MediaElement
		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
		hasTrait(type:String):Boolean Determines whether this media element has a media trait of the specified type.	MediaElement
		isPrototypeOf(theClass:Object):Boolean Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.	Object
		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
		removeMetadata(namespaceURL:String):Metadata Removes the Metadata object that was stored under this MediaElement with the specified namespace URL.	MediaElement
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.	Object
		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

Métodos protegidos

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	Método		Definido por
		addTrait(type:String, instance:org.osmf.traits:MediaTraitBase):void Adds a new media trait to this media element.	MediaElement
		removeTrait(type:String):org.osmf.traits:MediaTraitBase Removes a media trait from this media element.	MediaElement
		setupTraits():void Sets up the traits for this media element.	MediaElement

Eventos

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	Resumen	Definido por
activate	[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.	EventDispatcher
containerChange	Dispatched when the element's container property changed.	MediaElement
deactivate	[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.	EventDispatcher
mediaError	Dispatched when an error which impacts the operation of the media element occurs.	MediaElement
mediaInfo	Dispatched when a info which impacts the operation of the media element is available.	MediaElement
metadataAdd	Dispatched when a Metadata object has been added to this media element.	MediaElement
metadataRemove	Dispatched when a Metadata object has been removed from this media element.	MediaElement
traitAdd	Dispatched when a trait is added to the media element.	MediaElement
traitRemove	Dispatched when a trait is removed from the media element.	MediaElement

Información sobre constructores

()

Información sobre

public function DurationElement(duration:Number, mediaElement:MediaElement = null)

Versión del lenguaje:

ActionScript 3.0

Versión de producto:

OSMF 1.0

Versiones de motor de ejecución:

Flash Player 10, AIR 1.5

Constructor.

Parámetros

	`duration:Number` — Duration of the DurationElement's TimeTrait, in seconds.

	`mediaElement:MediaElement` (default = `null`) — Optional element to be wrapped by this DurationElement.

Ejemplos Cómo utilizar este ejemplo

DurationElementExample.as

package
{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    
    import org.osmf.elements.BeaconElement;
    import org.osmf.elements.DurationElement;
    import org.osmf.elements.ImageElement;
    import org.osmf.elements.VideoElement;
    import org.osmf.media.MediaPlayer;
    import org.osmf.media.MediaPlayerSprite;
    import org.osmf.media.URLResource;
    
    public class DurationElementExample extends Sprite
    {
        public function DurationElementExample()
        {                
            super();
            
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            
            var mediaPlayerSprite:MediaPlayerSprite = new MediaPlayerSprite();
            var imageElement:ImageElement = new ImageElement();
            imageElement.resource = new URLResource("http://mediapm.edgesuite.net/strobe/content/test/train.jpg");
            
            // Shows the image for 10 seconds.
            var durationElement:DurationElement = new DurationElement(10, imageElement);
            
            addChild(mediaPlayerSprite);
            mediaPlayerSprite.media = durationElement;    
        }
    }
}

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DurationElement - AS3 OSMF

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DurationElement