mx.events.PropertyChangeEvent - Adobe® Flex® 4 Language Reference (Flex 4)

Package	mx.events
Class	public class PropertyChangeEvent
Inheritance	PropertyChangeEvent Event Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The PropertyChangeEvent class represents the event object passed to the event listener when one of the properties of an object has changed, and provides information about the change. This event is used by collection classes, and is the only way for collections to know that the data they represent has changed. This event is also used by the Flex data binding mechanism.

See also

PropertyChangeEventKind

Public Properties

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	Property		Defined By
		bubbles : Boolean [read-only] Indicates whether an event is a bubbling event.	Event
		cancelable : Boolean [read-only] Indicates whether the behavior associated with the event can be prevented.	Event
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		currentTarget : Object [read-only] The object that is actively processing the Event object with an event listener.	Event
		eventPhase : uint [read-only] The current phase in the event flow.	Event
		kind : String Specifies the kind of change.	PropertyChangeEvent
		newValue : Object The value of the property after the change.	PropertyChangeEvent
		oldValue : Object The value of the property before the change.	PropertyChangeEvent
		property : Object A String, QName, or int specifying the property that changed.	PropertyChangeEvent
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object
		source : Object The object that the change occured on.	PropertyChangeEvent
		target : Object [read-only] The event target.	Event
		type : String [read-only] The type of event.	Event

Public Methods

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	Method		Defined By
		PropertyChangeEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, kind:String = null, property:Object = null, oldValue:Object = null, newValue:Object = null, source:Object = null) Constructor.	PropertyChangeEvent
		clone():Event Duplicates an instance of an Event subclass.	Event
		createUpdateEvent(source:Object, property:Object, oldValue:Object, newValue:Object):PropertyChangeEvent [static] Returns a new PropertyChangeEvent of kind PropertyChangeEventKind.UPDATE with the specified properties.	PropertyChangeEvent
		formatToString(className:String, ... arguments):String A utility function for implementing the toString() method in custom ActionScript 3.0 Event classes.	Event
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isDefaultPrevented():Boolean Checks whether the preventDefault() method has been called on the event.	Event
		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
		preventDefault():void Cancels an event's default behavior if that behavior can be canceled.	Event
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		stopImmediatePropagation():void Prevents processing of any event listeners in the current node and any subsequent nodes in the event flow.	Event
		stopPropagation():void Prevents processing of any event listeners in nodes subsequent to the current node in the event flow.	Event
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns a string containing all the properties of the Event object.	Event
		valueOf():Object Returns the primitive value of the specified object.	Object

Public Constants

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	Constant		Defined By
		ACTIVATE : String = "activate" [static] The ACTIVATE constant defines the value of the type property of an activate event object.	Event
		ADDED : String = "added" [static] The Event.ADDED constant defines the value of the type property of an added event object.	Event
		ADDED_TO_STAGE : String = "addedToStage" [static] The Event.ADDED_TO_STAGE constant defines the value of the type property of an addedToStage event object.	Event
		CANCEL : String = "cancel" [static] The Event.CANCEL constant defines the value of the type property of a cancel event object.	Event
		CHANGE : String = "change" [static] The Event.CHANGE constant defines the value of the type property of a change event object.	Event
		CLEAR : String = "clear" [static] The Event.CLEAR constant efines the value of the type property of a clear event object.	Event
		CLOSE : String = "close" [static] The Event.CLOSE constant defines the value of the type property of a close event object.	Event
		CLOSING : String = "closing" [static] The Event.CLOSING constant defines the value of the type property of a closing event object.	Event
		COMPLETE : String = "complete" [static] The Event.COMPLETE constant defines the value of the type property of a complete event object.	Event
		CONNECT : String = "connect" [static] The Event.CONNECT constant defines the value of the type property of a connect event object.	Event
		COPY : String = "copy" [static] Defines the value of the type property of a copy event object.	Event
		CUT : String = "cut" [static] Defines the value of the type property of a cut event object.	Event
		DEACTIVATE : String = "deactivate" [static] The Event.DEACTIVATE constant defines the value of the type property of a deactivate event object.	Event
		DISPLAYING : String = "displaying" [static] The Event.DISPLAYING constant defines the value of the type property of a displaying event object.	Event
		ENTER_FRAME : String = "enterFrame" [static] The Event.ENTER_FRAME constant defines the value of the type property of an enterFrame event object.	Event
		EXIT_FRAME : String = "exitFrame" [static] The Event.EXIT_FRAME constant defines the value of the type property of an exitFrame event object.	Event
		EXITING : String = "exiting" [static] The Event.EXITING constant defines the value of the type property of an exiting event object.	Event
		FRAME_CONSTRUCTED : String = "frameConstructed" [static] The Event.FRAME_CONSTRUCTED constant defines the value of the type property of an frameConstructed event object.	Event
		FULLSCREEN : String = "fullScreen" [static] The Event.FULL_SCREEN constant defines the value of the type property of a fullScreen event object.	Event
		HTML_BOUNDS_CHANGE : String = "htmlBoundsChange" [static] The Event.HTML_BOUNDS_CHANGE constant defines the value of the type property of an htmlBoundsChange event object.	Event
		HTML_DOM_INITIALIZE : String = "htmlDOMInitialize" [static] The Event.HTML_DOM_INITIALIZE constant defines the value of the type property of an htmlDOMInitialize event object.	Event
		HTML_RENDER : String = "htmlRender" [static] The Event.HTML_RENDER constant defines the value of the type property of an htmlRender event object.	Event
		ID3 : String = "id3" [static] The Event.ID3 constant defines the value of the type property of an id3 event object.	Event
		INIT : String = "init" [static] The Event.INIT constant defines the value of the type property of an init event object.	Event
		LOCATION_CHANGE : String = "locationChange" [static] The Event.LOCATION_CHANGE constant defines the value of the type property of a locationChange event object.	Event
		MOUSE_LEAVE : String = "mouseLeave" [static] The Event.MOUSE_LEAVE constant defines the value of the type property of a mouseLeave event object.	Event
		NETWORK_CHANGE : String = "networkChange" [static] The Event.NETWORK_CHANGE constant defines the value of the type property of a networkChange event object.	Event
		OPEN : String = "open" [static] The Event.OPEN constant defines the value of the type property of an open event object.	Event
		PASTE : String = "paste" [static] The Event.PASTE constant defines the value of the type property of a paste event object.	Event
		PROPERTY_CHANGE : String = "propertyChange" [static] The PropertyChangeEvent.PROPERTY_CHANGE constant defines the value of the type property of the event object for a PropertyChange event.	PropertyChangeEvent
		REMOVED : String = "removed" [static] The Event.REMOVED constant defines the value of the type property of a removed event object.	Event
		REMOVED_FROM_STAGE : String = "removedFromStage" [static] The Event.REMOVED_FROM_STAGE constant defines the value of the type property of a removedFromStage event object.	Event
		RENDER : String = "render" [static] The Event.RENDER constant defines the value of the type property of a render event object.	Event
		RESIZE : String = "resize" [static] The Event.RESIZE constant defines the value of the type property of a resize event object.	Event
		SCROLL : String = "scroll" [static] The Event.SCROLL constant defines the value of the type property of a scroll event object.	Event
		SELECT : String = "select" [static] The Event.SELECT constant defines the value of the type property of a select event object.	Event
		SELECT_ALL : String = "selectAll" [static] The Event.SELECT_ALL constant defines the value of the type property of a selectAll event object.	Event
		SOUND_COMPLETE : String = "soundComplete" [static] The Event.SOUND_COMPLETE constant defines the value of the type property of a soundComplete event object.	Event
		TAB_CHILDREN_CHANGE : String = "tabChildrenChange" [static] The Event.TAB_CHILDREN_CHANGE constant defines the value of the type property of a tabChildrenChange event object.	Event
		TAB_ENABLED_CHANGE : String = "tabEnabledChange" [static] The Event.TAB_ENABLED_CHANGE constant defines the value of the type property of a tabEnabledChange event object.	Event
		TAB_INDEX_CHANGE : String = "tabIndexChange" [static] The Event.TAB_INDEX_CHANGE constant defines the value of the type property of a tabIndexChange event object.	Event
		UNLOAD : String = "unload" [static] The Event.UNLOAD constant defines the value of the type property of an unload event object.	Event
		USER_IDLE : String = "userIdle" [static] The Event.USER_IDLE constant defines the value of the type property of a userIdle event object.	Event
		USER_PRESENT : String = "userPresent" [static] The Event.USER_PRESENT constant defines the value of the type property of a userPresent event object.	Event

Property Detail

kind

property

public var kind:String

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Specifies the kind of change. The possible values are PropertyChangeEventKind.UPDATE, PropertyChangeEventKind.DELETE, and null.

newValue

property

public var newValue:Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The value of the property after the change.

oldValue

property

public var oldValue:Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The value of the property before the change.

property

public var property:Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

A String, QName, or int specifying the property that changed.

source

property

public var source:Object

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The object that the change occured on.

Constructor Detail

PropertyChangeEvent

()

Constructor

public function PropertyChangeEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, kind:String = null, property:Object = null, oldValue:Object = null, newValue:Object = null, source:Object = null)

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Constructor.

Parameters

	`type:String` — The event type; indicates the action that triggered the event.

	`bubbles:Boolean` (default = `false`) — Specifies whether the event can bubble up the display list hierarchy.

	`cancelable:Boolean` (default = `false`) — Specifies whether the behavior associated with the event can be prevented.

	`kind:String` (default = `null`) — Specifies the kind of change. The possible values are `PropertyChangeEventKind.UPDATE`, `PropertyChangeEventKind.DELETE`, and `null`.

	`property:Object` (default = `null`) — A String, QName, or int specifying the property that changed.

	`oldValue:Object` (default = `null`) — The value of the property before the change.

	`newValue:Object` (default = `null`) — The value of the property after the change.

	`source:Object` (default = `null`) — The object that the change occured on.

Method Detail

createUpdateEvent

()

method

 public static function createUpdateEvent(source:Object, property:Object, oldValue:Object, newValue:Object):PropertyChangeEvent

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

Returns a new PropertyChangeEvent of kind PropertyChangeEventKind.UPDATE with the specified properties. This is a convenience method.

Parameters

	`source:Object` — The object where the change occured.

	`property:Object` — A String, QName, or int specifying the property that changed,

	`oldValue:Object` — The value of the property before the change.

	`newValue:Object` — The value of the property after the change.

Returns

PropertyChangeEvent — A newly constructed PropertyChangeEvent with the specified properties.

Constant Detail

PROPERTY_CHANGE

Constant

public static const PROPERTY_CHANGE:String = "propertyChange"

Language Version:

ActionScript 3.0

Product Version:

Flex 3

Runtime Versions:

Flash Player 9, AIR 1.1

The PropertyChangeEvent.PROPERTY_CHANGE constant defines the value of the type property of the event object for a PropertyChange event.

The properties of the event object have the following values:

Property	Value
`bubbles`	Determined by the constructor; defaults to false.
`cancelable`	Determined by the constructor; defaults to false.
`kind`	The kind of change; PropertyChangeEventKind.UPDATE or PropertyChangeEventKind.DELETE.
`oldValue`	The original property value.
`newValue`	The new property value, if any.
`property`	The property that changed.
`source`	The object that contains the property that changed.
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myButton.addEventListener()` to register an event listener, myButton is the value of the `currentTarget`.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.