Packagemx.events
Classpublic class PropertyChangeEvent
InheritancePropertyChangeEvent Inheritance Event Inheritance Object

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
 PropertyDefined by
 Inheritedbubbles : Boolean
Indicates whether an event is a bubbling event.
Event
 Inheritedcancelable : Boolean
Indicates whether the behavior associated with the event can be prevented.
Event
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 InheritedcurrentTarget : Object
The object that is actively processing the Event object with an event listener.
Event
 InheritedeventPhase : uint
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
 Inheritedprototype : 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
 Inheritedtarget : Object
The event target.
Event
 Inheritedtype : String
The type of event.
Event
Public Methods
 MethodDefined 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
 Inherited
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
 Inherited
formatToString(className:String, ... arguments):String
A utility function for implementing the toString() method in your custom Event class.
Event
 Inherited
hasOwnProperty(name:String):Boolean
Indicates whether an object has a specified property defined.
Object
 Inherited
isDefaultPrevented():Boolean
Checks whether preventDefault() has been called on the event.
Event
 Inherited
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
 Inherited
preventDefault():void
Cancels an event's default behavior if that behavior can be canceled.
Event
 Inherited
propertyIsEnumerable(name:String):Boolean
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
stopImmediatePropagation():void
Prevents processing of any event listeners in the current node and any subsequent nodes in the event flow.
Event
 Inherited
stopPropagation():void
Prevents processing of any event listeners in nodes subsequent to the current node in the event flow.
Event
 Inherited
toString():String
Returns a string containing all the properties of the Event object.
Event
 Inherited
valueOf():Object
Returns the primitive value of the specified object.
Object
Public Constants
 ConstantDefined by
 InheritedACTIVATE : String = "activate"
[static] Defines the value of the type property of an activate event object.
Event
 InheritedADDED : String = "added"
[static] Defines the value of the type property of an added event object.
Event
 InheritedCANCEL : String = "cancel"
[static] Defines the value of the type property of a cancel event object.
Event
 InheritedCHANGE : String = "change"
[static] Defines the value of the type property of a change event object.
Event
 InheritedCLOSE : String = "close"
[static] Defines the value of the type property of a close event object.
Event
 InheritedCOMPLETE : String = "complete"
[static] Defines the value of the type property of a complete event object.
Event
 InheritedCONNECT : String = "connect"
[static] Defines the value of the type property of a connect event object.
Event
 InheritedDEACTIVATE : String = "deactivate"
[static] Defines the value of the type property of a deactivate event object.
Event
 InheritedENTER_FRAME : String = "enterFrame"
[static] Defines the value of the type property of an enterFrame event object.
Event
 InheritedID3 : String = "id3"
[static] Defines the value of the type property of an id3 event object.
Event
 InheritedINIT : String = "init"
[static] Defines the value of the type property of an init event object.
Event
 InheritedMOUSE_LEAVE : String = "mouseLeave"
[static] Defines the value of the type property of a mouseLeave event object.
Event
 InheritedOPEN : String = "open"
[static] Defines the value of the type property of an open 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
 InheritedREMOVED : String = "removed"
[static] Defines the value of the type property of a removed event object.
Event
 InheritedRENDER : String = "render"
[static] Defines the value of the type property of a render event object.
Event
 InheritedRESIZE : String = "resize"
[static] Defines the value of the type property of a resize event object.
Event
 InheritedSCROLL : String = "scroll"
[static] Defines the value of the type property of a scroll event object.
Event
 InheritedSELECT : String = "select"
[static] Defines the value of the type property of a select event object.
Event
 InheritedSOUND_COMPLETE : String = "soundComplete"
[static] Defines the value of the type property of a soundComplete event object.
Event
 InheritedTAB_CHILDREN_CHANGE : String = "tabChildrenChange"
[static] Defines the value of the type property of a tabChildrenChange event object.
Event
 InheritedTAB_ENABLED_CHANGE : String = "tabEnabledChange"
[static] Defines the value of the type property of a tabEnabledChange event object.
Event
 InheritedTAB_INDEX_CHANGE : String = "tabIndexChange"
[static] Defines the value of the type property of a tabIndexChange event object.
Event
 InheritedUNLOAD : String = "unload"
[static] Defines the value of the type property of an unload event object.
Event
Property detail
kindproperty
public var kind:String

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

newValueproperty 
public var newValue:Object

The value of the property after the change.

oldValueproperty 
public var oldValue:Object

The value of the property before the change.

propertyproperty 
public var property:Object

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

sourceproperty 
public var source:Object

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)

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

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_CHANGEconstant
public static const PROPERTY_CHANGE:String = "propertyChange"

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:

PropertyValue
bubblesDetermined by the constructor; defaults to false.
cancelableDetermined by the constructor; defaults to false.
kindThe kind of change; PropertyChangeEventKind.UPDATE or PropertyChangeEventKind.DELETE.
oldValueThe original property value.
newValueThe new property value, if any.
propertyThe property that changed
sourceThe object that contains the property that changed.
currentTargetThe 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.
targetThe 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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Thu Jun 22 2006, 10:21 PM GMT-07:00

 

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