MediaFactory

套件	org.osmf.media
類別	public class MediaFactory
繼承	MediaFactory EventDispatcher Object
子類別	DefaultMediaFactory

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

MediaFactory represents a factory class for media elements.

The factory operation takes a MediaResourceBase as input and produces a MediaElement as output.

The MediaFactory maintains a list of MediaFactoryItem objects, each of which encapsulates all the information necessary to create a specific MediaElement. The MediaFactory relies on the canHandleResourceFunction method of each MediaFactoryItem to find a MediaFactoryItem object that can handle the specified MediaResourceBase.

The factory interface also exposes methods for querying for specific MediaFactoryItem objects, and for loading plugins (which hold MediaFactoryItem objects).

檢視範例

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
		numItems : int [唯讀] The number of MediaFactoryItems managed by the factory.	MediaFactory

公用方法

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	方法		定義自
		MediaFactory() Constructor.	MediaFactory
		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
		addItem(item:MediaFactoryItem):void Adds the specified MediaFactoryItem to the factory.	MediaFactory
		createMediaElement(resource:MediaResourceBase):MediaElement Returns a MediaElement that can be created based on the specified MediaResourceBase.	MediaFactory
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		getItemAt(index:int):MediaFactoryItem Gets the MediaFactoryItem at the specified index.	MediaFactory
		getItemById(id:String):MediaFactoryItem Returns the MediaFactoryItem with the specified ID or null if the specified MediaFactoryItem does not exist in this factory.	MediaFactory
		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
		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
		loadPlugin(resource:MediaResourceBase):void Load a plugin identified by the specified resource.	MediaFactory
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	EventDispatcher
		removeItem(item:MediaFactoryItem):void Removes the specified MediaFactoryItem from the factory.	MediaFactory
		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

	方法		定義自
		resolveItems(resource:MediaResourceBase, items:Vector.<MediaFactoryItem>):MediaFactoryItem Returns the most appropriate MediaFactoryItem for the specified resource out of the MediaFactoryItems in the specified list.	MediaFactory

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
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
mediaElementCreate	Dispatched when the MediaFactory has created a MediaElement.	MediaFactory
pluginLoad	Dispatched when the MediaFactory has successfully loaded a plugin.	MediaFactory
pluginLoadError	Dispatched when the MediaFactory has failed to load a plugin due to an error.	MediaFactory

屬性詳細資訊

numItems

屬性

numItems: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 MediaFactoryItems managed by the factory.

實作
public function get numItems():int

建構函式詳細資料

()

建構函式

public function MediaFactory()

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

addItem

()

方法

public function addItem(item:MediaFactoryItem):void

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 MediaFactoryItem to the factory. After the MediaFactoryItem has been added, for any MediaResourceBase that this MediaFactoryItem can handle, the factory will be able to create the corresponding media element. If a MediaFactoryItem with the same ID already exists in this factory, the new MediaFactoryItem object replaces it.

參數

item:MediaFactoryItem — The MediaFactoryItem to add.

擲回值

ArgumentError — If the argument is null or if the argument has a null ID field.

createMediaElement

()

方法

public function createMediaElement(resource:MediaResourceBase):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

Returns a MediaElement that can be created based on the specified MediaResourceBase.

Returns null if the factory cannot find a MediaFactoryItem object capable of creating such a MediaElement in this factory.

參數

resource:MediaResourceBase — The MediaResourceBase for which a corresponding MediaElement should be created.

傳回值

MediaElement — The MediaElement that was created or null if no such MediaElement could be created from the resource.

getItemAt

()

方法

public function getItemAt(index:int):MediaFactoryItem

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 MediaFactoryItem at the specified index.

參數

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

傳回值

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

getItemById

()

方法

public function getItemById(id:String):MediaFactoryItem

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 MediaFactoryItem with the specified ID or null if the specified MediaFactoryItem does not exist in this factory.

參數

id:String — ID of the MediaFactoryItem to retrieve.

傳回值

MediaFactoryItem — The MediaFactoryItem with the specified ID or null if the specified MediaFactoryItem does not exist in this factory.

loadPlugin

()

方法

public function loadPlugin(resource:MediaResourceBase):void

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

Load a plugin identified by the specified resource. The MediaFactory will not reload the plugin if it has already been loaded. Upon successful loading, the MediaFactoryItems within the plugin's PluginInfo property will be added to this MediaFactory, and a MediaFactoryEvent.PLUGIN_LOAD event will be dispatched. OtherwiseIf the load fails, a MediaFactoryEvent.PLUGIN_LOAD_ERROR event will be dispatched.

參數

resource:MediaResourceBase — MediaResourceBase representing the plugin. For remote (dynamic) plugins, use an URLResource pointing to the remote SWF to load. For local (static) plugins, use a PluginInfoResource.

擲回值

ArgumentError — If resource is null or resource is neither an URLResource nor a PluginInfoResource.

removeItem

()

方法

public function removeItem(item:MediaFactoryItem):void

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 MediaFactoryItem from the factory. If no such MediaFactoryItem exists in this factory, does nothing.

參數

item:MediaFactoryItem — The MediaFactoryItem to remove.

擲回值

ArgumentError — If the argument is null or if the argument has a null ID field.

resolveItems

()

方法

protected function resolveItems(resource:MediaResourceBase, items:Vector.<MediaFactoryItem>):MediaFactoryItem

Returns the most appropriate MediaFactoryItem for the specified resource out of the MediaFactoryItems in the specified list. This method is invoked when createMediaElement is invoked with a resource that more than one MediaFactoryItem can handle. Subclasses can override to select the most appropriate one. The default behavior is to select the first item which is not "native" to the framework, under the theory that plugins ought to take precedence over core media types. It makes this decision based on the presence or absence of an id value which starts with "org.osmf".

參數

	`resource:MediaResourceBase`

	`items:Vector.<MediaFactoryItem>`

傳回值

MediaFactoryItem

事件詳細資訊

mediaElementCreate

事件

事件物件類型: org.osmf.events.MediaFactoryEvent
屬性 MediaFactoryEvent.type = org.osmf.events.MediaFactoryEvent.MEDIA_ELEMENT_CREATE

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

Dispatched when the MediaFactory has created a MediaElement.

The MediaFactoryEvent.MEDIA_ELEMENT_CREATE constant defines the value of the type property of the event object for a mediaElementCreate event.

pluginLoad

事件

事件物件類型: org.osmf.events.MediaFactoryEvent
屬性 MediaFactoryEvent.type = org.osmf.events.MediaFactoryEvent.PLUGIN_LOAD

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

Dispatched when the MediaFactory has successfully loaded a plugin.

The MediaFactoryEvent.PLUGIN_LOAD constant defines the value of the type property of the event object for a pluginLoad event.

pluginLoadError

事件

事件物件類型: org.osmf.events.MediaFactoryEvent
屬性 MediaFactoryEvent.type = org.osmf.events.MediaFactoryEvent.PLUGIN_LOAD_ERROR

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

Dispatched when the MediaFactory has failed to load a plugin due to an error.

The MediaFactoryEvent.PLUGIN_LOAD_ERROR constant defines the value of the type property of the event object for a pluginLoadError event.

範例如何使用本範例

MediaFactoryExample.as

This sample demonstrates how MediaFactory can be used to load a plug-in. Note that the sample uses a mock-up plug-in URL.

package org.osmf.media
{
    import flash.display.Sprite;
    
    import org.osmf.events.MediaFactoryEvent;

    public class MediaFactoryExample extends Sprite
    {
        public function MediaFactoryExample()
        {
            // Construct a media factory, and listen to its plug-in related events:
            var factory:MediaFactory = new MediaFactory();
            factory.addEventListener(MediaFactoryEvent.PLUGIN_LOAD, onPluginLoaded);
            factory.addEventListener(MediaFactoryEvent.PLUGIN_LOAD_ERROR, onPluginLoadError);
            
            // Instruct the factory to load the plug-in at the given url:
            factory.loadPlugin(new URLResource("http://myinvalidurl.com/foo.swf"));        
        }
    
        private function onPluginLoaded(event:MediaFactoryEvent):void
        {
            // Use the factory to create a media-element related to the plugin:
            var factory:MediaFactory = event.target as MediaFactory;
            factory.createMediaElement(new URLResource("http://myinvalidurl.com/content"));
        }
        
        private function onPluginLoadError(event:MediaFactoryEvent):void
        {
            // Handle plug-in loading failure:
            trace("Plugin failed to load.");    
        }    
    }
}

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MediaFactory - AS3 OSMF

類別 x

numItems

MediaFactory

addItem

createMediaElement

getItemAt

getItemById

loadPlugin

removeItem

resolveItems

mediaElementCreate

pluginLoad

pluginLoadError