PropertyChangeEvent

Paket	mx.events
Klass	public class PropertyChangeEvent
Arv	PropertyChangeEvent Event Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

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.

Relaterade API-element

PropertyChangeEventKind

Publika egenskaper

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	Egenskap		Definieras med
		bubbles : Boolean [skrivskyddad] indikerar om händelsen är en bubblande händelse.	Event
		cancelable : Boolean [skrivskyddad] Indikerar om beteendet som är kopplat till händelsen kan förhindras.	Event
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	Object
		currentTarget : Object [skrivskyddad] Det objekt som aktivt behandlar Event-objektet med en händelseavlyssnare.	Event
		eventPhase : uint [skrivskyddad] Den nuvarande fasen i händelseflödet.	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
		source : Object The object that the change occured on.	PropertyChangeEvent
		target : Object [skrivskyddad] Händelsens mål.	Event
		type : String [skrivskyddad] Händelsens typ.	Event

Publika metoder

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	Metod		Definieras med
		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 Skapar ett duplikat av en instans av en Event-underklass.	Event
		createUpdateEvent(source:Object, property:Object, oldValue:Object, newValue:Object):PropertyChangeEvent [statisk] Returns a new PropertyChangeEvent of kind PropertyChangeEventKind.UPDATE with the specified properties.	PropertyChangeEvent
		formatToString(className:String, ... arguments):String Ett verktyg som används för att implementera metoden toString() i de anpassade klasserna ActionScript 3.0.	Event
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		isDefaultPrevented():Boolean Kontrollerar om preventDefault()-metoden har anropats för händelsen.	Event
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		preventDefault():void Avbryter en händelses standardbeteende om det beteendet kan avbrytas.	Event
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		stopImmediatePropagation():void Förhindrar behandling av händelsehanterare i den aktuella noden och alla noder som följer den aktuella noden i händelseflödet.	Event
		stopPropagation():void Förhindrar behandling av händelsehanterare i noder som följer den aktuella noden i händelseflödet.	Event
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String Returnerar en sträng som innehåller alla egenskaper i Event-objektet.	Event
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object

Publika konstanter

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	Konstant		Definieras med
		PROPERTY_CHANGE : String = "propertyChange" [statisk] The PropertyChangeEvent.PROPERTY_CHANGE constant defines the value of the type property of the event object for a PropertyChange event.	PropertyChangeEvent

Egenskapsdetaljer

kind

egenskap

public var kind:String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

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

newValue

egenskap

public var newValue:Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The value of the property after the change.

oldValue

egenskap

public var oldValue:Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The value of the property before the change.

property

egenskap

public var property:Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

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

source

egenskap

public var source:Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The object that the change occured on.

Konstruktordetaljer

()

Konstruktor

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)

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Constructor.

Parametrar

	`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.

Metoddetaljer

createUpdateEvent

()

metod

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

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

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

Parametrar

	`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.

Returnerar

PropertyChangeEvent — A newly constructed PropertyChangeEvent with the specified properties.

Konstantdetaljer

PROPERTY_CHANGE

Konstant

public static const PROPERTY_CHANGE:String = "propertyChange"

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

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.

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PropertyChangeEvent - AS3 Flex

Klasser x

kind

newValue

oldValue

property

source