Adobe® Flex® 4 Language Reference
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mx.effects.effectClasses 
MaskEffectInstance 
Packagemx.effects.effectClasses
Classpublic class MaskEffectInstance
InheritanceMaskEffectInstance Inheritance EffectInstance Inheritance EventDispatcher Inheritance Object
Subclasses IrisInstance, WipeDownInstance, WipeLeftInstance, WipeRightInstance, WipeUpInstance

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The MaskEffectInstance class is an abstract base class that implements the instance class for the MaskEffect class.

Every effect class that is a subclass of the TweenEffect class supports the following events:

  • tweenEnd: Dispatched when the tween effect ends.
  • tweenUpdate: Dispatched every time a TweenEffect class calculates a new value.

The event object passed to the event listener for these events is of type TweenEvent. The TweenEvent class defines the property value, which contains the tween value calculated by the effect. For the Mask effect, the TweenEvent.value property contains a 4-item Array, where:

  • value[0]:Number The value of the target's x property.
  • value[1]:Number The value of the target's y property.
  • value[2]:Number The value of the target's scaleX property.
  • value[3]:Number The value of the target's scaleY property.

See also



Public Properties
 PropertyDefined By
 InheritedclassName : String
[read-only] The name of the effect class, such as "FadeInstance".
EffectInstance
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  createMaskFunction : Function
Function called when the effect creates the mask.
MaskEffectInstance
 Inheritedduration : Number
The duration of the effect, in milliseconds.
EffectInstance
 Inheritedeffect : IEffect
The IEffect object that created this IEffectInstance object.
EffectInstance
 InheritedeffectTargetHost : mx.effects:IEffectTargetHost
A property that lets you access the target list-based control of a data effect.
EffectInstance
 InheritedhideFocusRing : Boolean
Determines whether the effect should hide the focus ring when starting the effect.
EffectInstance
  moveEasingFunction : Function
Easing function to use for moving the mask.
MaskEffectInstance
 InheritedplayheadTime : Number
Current time position of the effect.
EffectInstance
 InheritedpropertyChanges : PropertyChanges
Specifies the PropertyChanges object containing the start and end values for the set of properties relevant to the effect's targets.
EffectInstance
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 InheritedrepeatCount : int
Number of times to repeat the effect.
EffectInstance
 InheritedrepeatDelay : int
Amount of time, in milliseconds, to wait before repeating the effect.
EffectInstance
  scaleEasingFunction : Function
Easing function to use for scaling the mask.
MaskEffectInstance
  scaleXFrom : Number
Initial scaleX for mask.
MaskEffectInstance
  scaleXTo : Number
Ending scaleX for mask.
MaskEffectInstance
  scaleYFrom : Number
Initial scaleY for mask.
MaskEffectInstance
  scaleYTo : Number
Ending scaleY for mask.
MaskEffectInstance
  showTarget : Boolean
Specifies that the target component is becoming visible, false, or invisible, true.
MaskEffectInstance
 InheritedstartDelay : int
Amount of time, in milliseconds, to wait before starting the effect.
EffectInstance
 InheritedsuspendBackgroundProcessing : Boolean
If true, blocks all background processing while the effect is playing.
EffectInstance
 Inheritedtarget : Object
The UIComponent object to which this effect is applied.
EffectInstance
  targetArea : Rectangle
The area where the mask is applied on the target.
MaskEffectInstance
 InheritedtriggerEvent : Event
The event, if any, which triggered the playing of the effect.
EffectInstance
  xFrom : Number
Initial position's x coordinate for mask.
MaskEffectInstance
  xTo : Number
Destination position's x coordinate for mask.
MaskEffectInstance
  yFrom : Number
Initial position's y coordinate for mask.
MaskEffectInstance
  yTo : Number
Destination position's y coordinate for mask.
MaskEffectInstance
Protected Properties
 PropertyDefined By
  effectMask : Shape
Contains the effect mask, either the default mask created by the defaultCreateMask() method, or the one specified by the function passed to the createMaskFunction property.
MaskEffectInstance
 InheritedplayCount : int = 0
Number of times that the instance has been played.
EffectInstance
  targetVisualBounds : Rectangle
The actual size of the effect target, including any drop shadows.
MaskEffectInstance
Public Methods
 MethodDefined By
  
Constructor.
MaskEffectInstance
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 Inherited
Interrupts an effect instance that is currently playing, and jumps immediately to the end of the effect.
EffectInstance
 Inherited
Called by the end() method when the effect finishes playing.
EffectInstance
 Inherited
Called after each iteration of a repeated effect finishes playing.
EffectInstance
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
This method is called if the effect was triggered by the EffectManager.
EffectInstance
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
  
[override] Pauses the effect until you call the resume() method.
MaskEffectInstance
 Inherited
Plays the effect instance on the target.
EffectInstance
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
  
[override] Resumes the effect after it has been paused by a call to the pause() method.
MaskEffectInstance
  
[override] Plays the effect in reverse, starting from the current position of the effect.
MaskEffectInstance
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Plays the effect instance on the target after the startDelay period has elapsed.
EffectInstance
 Inherited
Stops the effect, leaving the target in its current state.
EffectInstance
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Protected Methods
 MethodDefined By
  
Creates the default mask for the effect.
MaskEffectInstance
  
Initializes the move and scale properties of the effect.
MaskEffectInstance
  
Callback method that is called when the x and y position of the mask should be updated by the effect for the last time.
MaskEffectInstance
  
Callback method that is called when the x and y position of the mask should be updated by the effect.
MaskEffectInstance
  
Callback method that is called when the scaleX and scaleY properties of the mask should be updated by the effect for the last time.
MaskEffectInstance
  
Callback method that is called when the scaleX and scaleY properties of the mask should be updated by the effect.
MaskEffectInstance
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
Property Detail

createMaskFunction

property
createMaskFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Function called when the effect creates the mask. The default value is a function that returns a Rectangle with the same dimensions as the effect target.

You can use this property to specify your own callback function to draw the mask. The function must have the following signature:

	  public function createLargeMask(targ:Object, bounds:Rectangle):Shape {
	    var myMask:Shape = new Shape();
	    // Create mask.
	  
	    return myMask;
	  }
	  

You set this property to the name of the function, as the following example shows for the WipeLeft effect:

	    <mx:WipeLeft id="showWL" createMaskFunction="createLargeMask" showTarget="false"/>



Implementation
    public function get createMaskFunction():Function
    public function set createMaskFunction(value:Function):void

effectMask

property 
protected var effectMask:Shape

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Contains the effect mask, either the default mask created by the defaultCreateMask() method, or the one specified by the function passed to the createMaskFunction property.

moveEasingFunction

property 
public var moveEasingFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Easing function to use for moving the mask.

scaleEasingFunction

property 
public var scaleEasingFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Easing function to use for scaling the mask.

scaleXFrom

property 
public var scaleXFrom:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initial scaleX for mask.

scaleXTo

property 
public var scaleXTo:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Ending scaleX for mask.

scaleYFrom

property 
public var scaleYFrom:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initial scaleY for mask.

scaleYTo

property 
public var scaleYTo:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Ending scaleY for mask.

showTarget

property 
showTarget:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Specifies that the target component is becoming visible, false, or invisible, true.

The default value is true.



Implementation
    public function get showTarget():Boolean
    public function set showTarget(value:Boolean):void

targetArea

property 
public var targetArea:Rectangle

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The area where the mask is applied on the target. The dimensions are relative to the target itself. By default, the area is the entire target and is created like this: new Rectangle(0, 0, target.width, target.height);

targetVisualBounds

property 
protected var targetVisualBounds:Rectangle

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The actual size of the effect target, including any drop shadows. Flex calculates the value of this property; you do not have to set it.

xFrom

property 
public var xFrom:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initial position's x coordinate for mask.

xTo

property 
public var xTo:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Destination position's x coordinate for mask.

yFrom

property 
public var yFrom:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initial position's y coordinate for mask.

yTo

property 
public var yTo:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Destination position's y coordinate for mask.

Constructor Detail

MaskEffectInstance

()Constructor
public function MaskEffectInstance(target:Object)

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Constructor.

Parameters
target:Object — The Object to animate with this effect.
Method Detail

defaultCreateMask

()method
protected function defaultCreateMask(targ:Object, bounds:Rectangle):Shape

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Creates the default mask for the effect.

Parameters

targ:Object — The effect target.
 
bounds:Rectangle — The actual visual bounds of the target which includes drop shadows

Returns
Shape — A Shape object that defines the mask.

initMaskEffect

()method 
protected function initMaskEffect():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initializes the move and scale properties of the effect. All subclasses should override this function. Flex calls it after the mask has been created, but before the tweens are created.

onMoveTweenEnd

()method 
protected function onMoveTweenEnd(value:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Callback method that is called when the x and y position of the mask should be updated by the effect for the last time. You do not call this method directly. This method implements the method of the superclass.

Parameters

value:Object — Contains the final x and y value for the mask position, where value[0] contains the x position of the mask, and value[1] contains the y position.

onMoveTweenUpdate

()method 
protected function onMoveTweenUpdate(value:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Callback method that is called when the x and y position of the mask should be updated by the effect. You do not call this method directly. This method implements the method of the superclass.

Parameters

value:Object — Contains an interpolated x and y value for the mask position, where value[0] contains the new x position of the mask, and value[1] contains the new y position.

onScaleTweenEnd

()method 
protected function onScaleTweenEnd(value:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Callback method that is called when the scaleX and scaleY properties of the mask should be updated by the effect for the last time. You do not call this method directly. This method implements the method of the superclass.

Parameters

value:Object — Contains the final scaleX and scaleY value for the mask, where value[0] contains the scaleX value of the mask, and value[1] contains the scaleY value.

onScaleTweenUpdate

()method 
protected function onScaleTweenUpdate(value:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Callback method that is called when the scaleX and scaleY properties of the mask should be updated by the effect. You do not call this method directly. This method implements the method of the superclass.

Parameters

value:Object — Contains an interpolated scaleX and scaleY value for the mask, where value[0] contains the new scaleX value of the mask, and value[1] contains the new scaleY value.

pause

()method 
override public function pause():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Pauses the effect until you call the resume() method.

resume

()method 
override public function resume():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Resumes the effect after it has been paused by a call to the pause() method.

reverse

()method 
override public function reverse():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Plays the effect in reverse, starting from the current position of the effect.