CompositeElement

套件	org.osmf.elements
類別	public class CompositeElement
繼承	CompositeElement MediaElement EventDispatcher Object
子類別	ParallelElement, SerialElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

CompositeElement is a media element which encapsulates a collection of other more granular media elements. It is generally referred to as a media composition.

The media elements that make up a media composition are treated as a single, unified media element. For example, if a media composition encapsulates a sequence of videos, the CompositeElement will behave as if it's a single VideoElement, but one which plays several videos in sequence.

Because a CompositeElement maintains a list of MediaElement children, any of which may be CompositeElements themselves, a media composition can be expressed as a tree structure.

Typically a CompositeElement is not instantiated directly but instead is used as the base class for creating specific types of media compositions.

公用屬性

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	屬性		定義自
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		container : IMediaContainer [唯讀] The media container that this element uses.	MediaElement
		metadataNamespaceURLs : Vector.<String> [唯讀] A Vector containing the namespace URLs for all Metadata objects stored within this MediaElement.	MediaElement
		numChildren : int [唯讀] The number of child MediaElements in this media composition.	CompositeElement
		resource : MediaResourceBase The media resource that this media element operates on.	MediaElement
		traitTypes : Vector.<String> [唯讀] A Vector of MediaTraitType values representing the trait types on this media element.	MediaElement

公用方法

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	方法		定義自
		CompositeElement() Constructor.	CompositeElement
		addChild(child:MediaElement):MediaElement Adds the specified child to the end of the list.	CompositeElement
		addChildAt(child:MediaElement, index:Number):MediaElement Adds the child to the list at the specified index.	CompositeElement
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void 會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。	EventDispatcher
		addMetadata(namespaceURL:String, metadata:Metadata):void Adds a Metadata object to this MediaElement under the specified namespace URL.	MediaElement
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		getChildAt(index:int):MediaElement Gets the child at the specified index.	CompositeElement
		getChildIndex(child:MediaElement):int Returns the index of the child if it is in the list such that getChildAt(index) == child.	CompositeElement
		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 會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。	EventDispatcher
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		hasTrait(type:String):Boolean Determines whether this media element has a media trait of the specified type.	MediaElement
		isPrototypeOf(theClass:Object):Boolean 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeChild(child:MediaElement):MediaElement Removes the specified child and returns it.	CompositeElement
		removeChildAt(index:int):MediaElement Removes the child at the specified index and returns it.	CompositeElement
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	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 為迴圈作業設定動態屬性的可用性。	Object
		toLocaleString():String 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		valueOf():Object 會傳回指定之物件的基本值。	Object
		willTrigger(type:String):Boolean 檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。	EventDispatcher

保護方法

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	方法		定義自
		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

事件

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	摘要	定義自
activate	[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。	EventDispatcher
containerChange	Dispatched when the element's container property changed.	MediaElement
deactivate	[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。	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

屬性詳細資訊

numChildren

屬性

numChildren:int [唯讀]

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

The number of child MediaElements in this media composition.

實作
public function get numChildren():int

建構函式詳細資料

()

建構函式

public function CompositeElement()

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Constructor.

方法詳細資訊

addChild

()

方法

public function addChild(child:MediaElement):MediaElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Adds the specified child to the end of the list. Equivalent to addChildAt(child,numChildren).

參數

child:MediaElement — The child to add.

傳回值

MediaElement — The MediaElement that you pass in the child parameter.

擲回值

	`ArgumentError` — If child is `null`.

	`RangeError` — If the specified index is less than zero or greater than the length of the list.

	`Error` — If the child is already a child.

addChildAt

()

方法

public function addChildAt(child:MediaElement, index:Number):MediaElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Adds the child to the list at the specified index. If a child already exists at this index, it and all subsequent children will have their index positions increased by one.

參數

	`child:MediaElement` — The child to add.

	`index:Number` — The index position at which to add the child.

傳回值

MediaElement — The MediaElement that you pass in the child parameter.

擲回值

	`ArgumentError` — If child is `null`.

	`RangeError` — If the specified index is less than zero or greater than the length of the list.

	`Error` — If the child is already a child.

getChildAt

()

方法

public function getChildAt(index:int):MediaElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Gets the child at the specified index.

參數

index:int — The index in the list from which to retrieve the child.

傳回值

MediaElement — The child at that index or null if there is none.

getChildIndex

()

方法

public function getChildIndex(child:MediaElement):int

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Returns the index of the child if it is in the list such that getChildAt(index) == child.

參數

child:MediaElement — The child to find.

傳回值

int — The index of the child or -1 if the child is not in the list.

removeChild

()

方法

public function removeChild(child:MediaElement):MediaElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Removes the specified child and returns it. Equivalent to removeChildAt(child,getChildIndex(child)).

參數

child:MediaElement — The child MediaElement to remove.

傳回值

MediaElement — The MediaElement that you pass in the child parameter.

擲回值

ArgumentError — If the child is not a child of this composition.

removeChildAt

()

方法

public function removeChildAt(index:int):MediaElement

語言版本:

ActionScript 3.0

產品版本:

OSMF 1.0

執行階段版本:

Flash Player 10, AIR 1.5

Removes the child at the specified index and returns it. Any children with index positions greater than this index have their index positions decreased by one.

參數

index:int — The index from which to remove the child.

傳回值

MediaElement — The child at that index.

擲回值

RangeError — If the specified index is less than zero or greater than the length of the list.

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CompositeElement - AS3 OSMF

類別 x

numChildren