mx.utils.OnDemandEventDispatcher - Adobe® Flex® 4 Language Reference (Flex 4)

Package	mx.utils
Class	public class OnDemandEventDispatcher
Inheritance	OnDemandEventDispatcher Object
Implements	IEventDispatcher
Subclasses	AsyncListView, LayoutBase, OverrideBase

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

OnDemandEventDispatcher serves as a base class for classes that dispatch events but expect listeners to be infrequent. When a class extends OnDemandEventDispatcher instead of the standard EventDispatcher, it is trading off a small overhead on every single instance for a slightly larger overhead on only the instances that actually have listeners attached to them.

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

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	Method		Defined By
		OnDemandEventDispatcher()	OnDemandEventDispatcher
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void	OnDemandEventDispatcher
		dispatchEvent(event:Event):Boolean	OnDemandEventDispatcher
		hasEventListener(type:String):Boolean	OnDemandEventDispatcher
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void	OnDemandEventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object
		willTrigger(type:String):Boolean	OnDemandEventDispatcher

Constructor Detail

OnDemandEventDispatcher

()

Constructor

public function OnDemandEventDispatcher()

Method Detail

addEventListener

()

method

 public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Parameters

	`type:String`

	`listener:Function`

	`useCapture:Boolean` (default = `false`)

	`priority:int` (default = `0`)

	`useWeakReference:Boolean` (default = `false`)

dispatchEvent

()

method

public function dispatchEvent(event:Event):Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Parameters

event:Event

Returns

Boolean

hasEventListener

()

method

public function hasEventListener(type:String):Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Parameters

type:String

Returns

Boolean

removeEventListener

()

method

public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Parameters

	`type:String`

	`listener:Function`

	`useCapture:Boolean` (default = `false`)

willTrigger

()

method

public function willTrigger(type:String):Boolean

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Parameters

type:String

Returns

Boolean