Adobe® Flex® 4 Language Reference
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mx.effects 
Fade 
Packagemx.effects
Classpublic class Fade
InheritanceFade Inheritance TweenEffect Inheritance Effect Inheritance EventDispatcher Inheritance Object

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


Starting with Flex 4.0, Adobe recommends that you use the spark.effects.Fade class as an alternative to this class.

The Fade effect animates the alpha property of a component, either from transparent to opaque, or from opaque to transparent.

If you specify the Fade effect for the showEffect or hideEffect trigger, and if you omit values for the alphaFrom and alphaTo properties, the effect automatically transitions alpha from 0 to the target's current alpha value on a showEffect trigger, and from the target's current alpha value to 0 on a hideEffect trigger.

Note: To use the Fade effect with text, you must use an embedded font, not a device font.

MXML SyntaxexpandedHide MXML Syntax

The <mx:Fade> tag inherits the tag attributes of its superclass, and adds the following tag attributes:

  <mx:Fade 
    id="ID"
    alphaFrom="val"
    alphaTo="val"
  />
  

View the examples

See also



Public Properties
 PropertyDefined By
  alphaFrom : Number
Initial transparency level between 0.0 and 1.0, where 0.0 means transparent and 1.0 means fully opaque.
Fade
  alphaTo : Number
Final transparency level, where 0.0 means transparent and 1.0 means fully opaque.
Fade
 InheritedclassName : String
[read-only] The name of the effect class, such as "Fade".
Effect
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 InheritedcustomFilter : mx.effects:EffectTargetFilter
Specifies a custom filter object, of type EffectTargetFilter, used by the effect to determine the targets on which to play the effect.
Effect
 Inheritedduration : Number
Duration of the effect in milliseconds.
Effect
 InheritedeasingFunction : Function = null
The easing function for the animation.
TweenEffect
 InheritedeffectTargetHost : mx.effects:IEffectTargetHost
A property that lets you access the target list-based control of a data effect.
Effect
 Inheritedfilter : String
Specifies an algorithm for filtering targets for an effect.
Effect
 InheritedhideFocusRing : Boolean
Determines whether the effect should hide the focus ring when starting the effect.
Effect
 InheritedinstanceClass : Class
An object of type Class that specifies the effect instance class class for this effect class.
Effect
 InheritedisPlaying : Boolean
[read-only] A read-only flag which is true if any instances of the effect are currently playing, and false if none are.
Effect
 InheritedperElementOffset : Number
Additional delay, in milliseconds, for effect targets after the first target of the effect.
Effect
 InheritedplayheadTime : Number
Current time position of the effect.
Effect
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 InheritedrelevantProperties : Array
An Array of property names to use when performing filtering.
Effect
 InheritedrelevantStyles : Array
An Array of style names to use when performing filtering.
Effect
 InheritedrepeatCount : int = 1
Number of times to repeat the effect.
Effect
 InheritedrepeatDelay : int = 0
Amount of time, in milliseconds, to wait before repeating the effect.
Effect
 InheritedstartDelay : int = 0
Amount of time, in milliseconds, to wait before starting the effect.
Effect
 InheritedsuspendBackgroundProcessing : Boolean = false
If true, blocks all background processing while the effect is playing.
Effect
 Inheritedtarget : Object
The object to which this effect is applied.
Effect
 Inheritedtargets : Array
An Array of objects that are targets for the effect.
Effect
 InheritedtriggerEvent : Event
The Event object passed to this Effect by the EffectManager when an effect is triggered, or null if the effect is not being played by the EffectManager.
Effect
Protected Properties
 PropertyDefined By
 InheritedapplyTransitionEndProperties : Boolean
This flag controls whether the effect, when run in a transition, automatically applies the property values according to the end state, as opposed to leaving values as set by the effect itself.
Effect
 InheritedendValuesCaptured : Boolean = false
A flag containing true if the end values of an effect have already been determined, or false if they should be acquired from the current properties of the effect targets when the effect runs.
Effect
Public Methods
 MethodDefined By
  
Fade(target:Object = null)
Constructor.
Fade
 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
Captures the current values of the relevant properties on the effect's targets and saves them as end values.
Effect
 Inherited
Captures the current values of the relevant properties of an additional set of targets Flex uses this function when a data change effect is run.
Effect
 Inherited
Captures the current values of the relevant properties on the effect's targets.
Effect
 Inherited
Creates a single effect instance and initializes it.
Effect
 Inherited
createInstances(targets:Array = null):Array
Takes an Array of target objects and invokes the createInstance() method on each target.
Effect
 Inherited
Removes event listeners from an instance and removes it from the list of instances.
Effect
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 Inherited
end(effectInstance:IEffectInstance = null):void
Interrupts an effect that is currently playing, and jumps immediately to the end of the effect.
Effect
 Inherited
Returns an Array of Strings, where each String is the name of a property changed by this effect.
Effect
 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
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Pauses the effect until you call the resume() method.
Effect
 Inherited
play(targets:Array = null, playReversedFromEnd:Boolean = false):Array
Begins playing the effect.
Effect
 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
 Inherited
Resumes the effect after it has been paused by a call to the pause() method.
Effect
 Inherited
Plays the effect in reverse, if the effect is currently playing, starting from the current position of the effect.
Effect
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Stops the effect, leaving the effect targets in their current state.
Effect
 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
 Inherited
applyValueToTarget(target:Object, property:String, value:*, props:Object):void
Used internally by the Effect infrastructure.
Effect
 Inherited
Called when an effect instance has finished playing.
Effect
 Inherited
This method is called when the effect instance starts playing.
Effect
 Inherited
Called when an effect instance has stopped by a call to the stop() method.
Effect
 Inherited
filterInstance(propChanges:Array, target:Object):Boolean
Determines the logic for filtering out an effect instance.
Effect
 Inherited
getValueFromTarget(target:Object, property:String):*
Called by the captureStartValues() method to get the value of a property from the target.
Effect
 Inherited
Copies properties of the effect to the effect instance.
Effect
 Inherited
Called when the TweenEffect dispatches a TweenEvent.
TweenEffect
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
 InheritedDispatched when one of the effect's instances finishes playing, either when the instance finishes playing or when the effect is interrupted by a call to the end() method.Effect
 InheritedDispatched when the effect starts playing.Effect
 InheritedDispatched when the effect has been stopped, which only occurs when the effect is interrupted by a call to the stop() method.Effect
 InheritedDispatched when the tween effect ends.TweenEffect
 InheritedDispatched when the tween effect starts, which corresponds to the first call to the onTweenUpdate() method.TweenEffect
 InheritedDispatched every time the tween effect updates the target.TweenEffect
Property Detail

alphaFrom

property
public var alphaFrom:Number

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

Initial transparency level between 0.0 and 1.0, where 0.0 means transparent and 1.0 means fully opaque.

If the effect causes the target component to disappear, the default value is the current value of the target's alpha property. If the effect causes the target component to appear, the default value is 0.0.

alphaTo

property 
public var alphaTo:Number

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

Final transparency level, where 0.0 means transparent and 1.0 means fully opaque.

If the effect causes the target component to disappear, the default value is 0.0. If the effect causes the target component to appear, the default value is the current value of the target's alpha property.

Constructor Detail

Fade

()Constructor
public function Fade(target:Object = null)

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

Constructor.

Parameters
target:Object (default = null) — The Object to animate with this effect.
FadeEffectExample.mxml
<?xml version="1.0"?>
<!-- Simple example to demonstrate the Halo Fade effect. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx"
        initialize="Font.registerFont(myriad_font);">

    <fx:Script>
        <![CDATA[

            import flash.text.Font;

            [Embed("assets/MyriadWebPro.ttf", fontName="MyMyriad")]
            public var myriad_font:Class;
        ]]>
    </fx:Script>

    <fx:Declarations>
        <mx:Fade id="fadeOut" duration="1000" alphaFrom="1.0" alphaTo="0.0"/>
        <mx:Fade id="fadeIn" duration="1000" alphaFrom="0.0" alphaTo="1.0"/>
    </fx:Declarations>

    <s:Panel title="Halo Fade Effect Example" width="95%" height="95%">
        <s:VGroup left="20" right="20" top="20" bottom="20">
            <s:Label width="100%" color="blue"
                text="Use the Fade effect to show or hide the text and image. Use an embedded font when applying the Fade effect to text."/>

            <mx:Text text="Nokia 9930"
                fontFamily="MyMyriad" fontSize="14"
                visible="{cb1.selected}"
                hideEffect="{fadeOut}" showEffect="{fadeIn}"/>

            <mx:Image source="@Embed(source='assets/Nokia_6630.png')"
                visible="{cb1.selected}"
                hideEffect="{fadeOut}" showEffect="{fadeIn}"/>

            <s:CheckBox id="cb1" label="visible" selected="true"/>
        </s:VGroup>
    </s:Panel>
</s:Application>