Adobe® Flex® 4 Language Reference
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spark.filters 
BevelFilter 
Packagespark.filters
Classpublic class BevelFilter
InheritanceBevelFilter Inheritance BaseDimensionFilter Inheritance BaseFilter Inheritance EventDispatcher Inheritance Object
Implements IBitmapFilter

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The BevelFilter class lets you add a bevel effect to display objects. A bevel effect gives objects such as buttons a three-dimensional look. You can customize the look of the bevel with different highlight and shadow colors, the amount of blur on the bevel, the angle of the bevel, the placement of the bevel, and a knockout effect. You can apply the filter to any display object (that is, objects that inherit from the DisplayObject class), such as MovieClip, SimpleButton, TextField, and Video objects, as well as to BitmapData objects.

To create a new filter, use the constructor new BevelFilter(). The use of filters depends on the object to which you apply the filter:

  • To apply filters to movie clips, text fields, buttons, and video, use the filters property (inherited from DisplayObject). Setting the filters property of an object does not modify the object, and you can remove the filter by clearing the filters property.
  • To apply filters to BitmapData objects, use the BitmapData.applyFilter() method. Calling applyFilter() on a BitmapData object takes the source BitmapData object and the filter object and generates a filtered image as a result.

If you apply a filter to a display object, the value of the cacheAsBitmap property of the object is set to true. If you remove all filters, the original value of cacheAsBitmap is restored.

This filter supports Stage scaling. However, it does not support general scaling, rotation, and skewing. If the object itself is scaled (if the scaleX and scaleY properties are not set to 100%), the filter is not scaled. It is scaled only when the user zooms in on the Stage.

A filter is not applied if the resulting image exceeds the maximum dimensions. In AIR 1.5 and Flash Player 10, the maximum is 8,191 pixels in width or height, and the total number of pixels cannot exceed 16,777,215 pixels. (So, if an image is 8,191 pixels wide, it can only be 2,048 pixels high.) If, for example, you zoom in on a large movie clip with a filter applied, the filter is turned off if the resulting image exceeds the maximum dimensions.

MXML SyntaxexpandedHide MXML Syntax

The <s:BevelFilter> tag inherits all of the tag attributes of its superclass and adds the following tag attributes:

  <s:BevelFilter 
    Properties
    angle="45"
    distance="4"
    highlightAlpha="1"
    highlightColor="0xFFFFFF"
    shadowAlpha="1"
    shadowColor="0x000000"
    type="inner"
  />
  

View the examples

See also



Public Properties
 PropertyDefined By
  angle : Number
The angle of the bevel, in degrees.
BevelFilter
 InheritedblurX : Number
The amount of horizontal blur.
BaseDimensionFilter
 InheritedblurY : Number
The amount of vertical blur.
BaseDimensionFilter
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  distance : Number
The offset distance of the bevel.
BevelFilter
  highlightAlpha : Number
The alpha transparency value of the highlight color.
BevelFilter
  highlightColor : uint
The highlight color of the bevel.
BevelFilter
 Inheritedknockout : Boolean
Specifies whether the object has a knockout effect.
BaseDimensionFilter
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 Inheritedquality : int
The number of times to apply the filter.
BaseDimensionFilter
  shadowAlpha : Number
The alpha transparency value of the shadow color.
BevelFilter
  shadowColor : uint
The shadow color of the bevel.
BevelFilter
 Inheritedstrength : Number
The strength of the imprint or spread.
BaseDimensionFilter
  type : String
The placement of the filter effect.
BevelFilter
Public Methods
 MethodDefined By
  
BevelFilter(distance:Number = 4.0, angle:Number = 45, highlightColor:uint = 0xFFFFFF, highlightAlpha:Number = 1.0, shadowColor:uint = 0x000000, shadowAlpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1, quality:int = 1, type:String = "inner", knockout:Boolean = false)
Constructor.
BevelFilter
 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
  
Returns a copy of this filter object.
BevelFilter
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 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
BaseFilter
 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
Sets the availability of a dynamic property for loop operations.
Object
 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
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
Public Constants
 ConstantDefined By
 InheritedCHANGE : String = "change"
[static]
BaseFilter
Property Detail

angle

property
angle:Number

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The angle of the bevel, in degrees. Valid values are from 0 to 360. The angle value represents the angle of the theoretical light source falling on the object and determines the placement of the effect relative to the object. If the distance property is set to 0, the effect is not offset from the object and, therefore, the angle property has no effect.

The default value is 45.



Implementation
    public function get angle():Number
    public function set angle(value:Number):void

distance

property 
distance:Number

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The offset distance of the bevel. Valid values are in pixels (floating point).

The default value is 4.



Implementation
    public function get distance():Number
    public function set distance(value:Number):void

highlightAlpha

property 
highlightAlpha:Number

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The alpha transparency value of the highlight color. The value is specified as a normalized value from 0 to 1. For example, .25 sets a transparency value of 25%.

The default value is 1.



Implementation
    public function get highlightAlpha():Number
    public function set highlightAlpha(value:Number):void

highlightColor

property 
highlightColor:uint

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The highlight color of the bevel. Valid values are in hexadecimal format, 0xRRGGBB.

The default value is 0xFFFFFF.



Implementation
    public function get highlightColor():uint
    public function set highlightColor(value:uint):void

shadowAlpha

property 
shadowAlpha:Number

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The alpha transparency value of the shadow color. This value is specified as a normalized value from 0 to 1. For example, .25 sets a transparency value of 25%.

The default value is 1.



Implementation
    public function get shadowAlpha():Number
    public function set shadowAlpha(value:Number):void

shadowColor

property 
shadowColor:uint

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The shadow color of the bevel. Valid values are in hexadecimal format, 0xRRGGBB.

The default value is 0x000000.



Implementation
    public function get shadowColor():uint
    public function set shadowColor(value:uint):void

type

property 
type:String

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

The placement of the filter effect. Possible values are flash.filters.BitmapFilterType constants:

  • BitmapFilterType.OUTER - Glow on the outer edge of the object.
  • BitmapFilterType.INNER - Glow on the inner edge of the object; the default.
  • BitmapFilterType.FULL - Glow on top of the object.

The default value is BitmapFilterType.INNER.



Implementation
    public function get type():String
    public function set type(value:String):void

See also

Constructor Detail

BevelFilter

()Constructor
public function BevelFilter(distance:Number = 4.0, angle:Number = 45, highlightColor:uint = 0xFFFFFF, highlightAlpha:Number = 1.0, shadowColor:uint = 0x000000, shadowAlpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1, quality:int = 1, type:String = "inner", knockout:Boolean = false)

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

Constructor.

Parameters
distance:Number (default = 4.0) — The offset distance of the bevel, in pixels (floating point).
 
angle:Number (default = 45) — The angle of the bevel, from 0 to 360 degrees.
 
highlightColor:uint (default = 0xFFFFFF) — The highlight color of the bevel, 0xRRGGBB.
 
highlightAlpha:Number (default = 1.0) — The alpha transparency value of the highlight color. Valid values are 0.0 to 1.0. For example, .25 sets a transparency value of 25%.
 
shadowColor:uint (default = 0x000000) — The shadow color of the bevel, 0xRRGGBB.
 
shadowAlpha:Number (default = 1.0) — The alpha transparency value of the shadow color. Valid values are 0.0 to 1.0. For example, .25 sets a transparency value of 25%.
 
blurX:Number (default = 4.0) — The amount of horizontal blur in pixels. Valid values are 0 to 255.0 (floating point).
 
blurY:Number (default = 4.0) — The amount of vertical blur in pixels. Valid values are 0 to 255.0 (floating point).
 
strength:Number (default = 1) — The strength of the imprint or spread. The higher the value, the more color is imprinted and the stronger the contrast between the bevel and the background. Valid values are 0 to 255.0.
 
quality:int (default = 1) — The quality of the bevel. Valid values are 0 to 15, but for most applications, you can use flash.filters.BitmapFilterQuality constants:
  • BitmapFilterQuality.LOW
  • BitmapFilterQuality.MEDIUM
  • BitmapFilterQuality.HIGH

Filters with lower values render faster. You can use the other available numeric values to achieve different effects.

 
type:String (default = "inner") — The type of bevel. Valid values are flash.filters.BitmapFilterType constants: BitmapFilterType.INNER, BitmapFilterType.OUTER, or BitmapFilterType.FULL.
 
knockout:Boolean (default = false) — Applies a knockout effect (true), which effectively makes the object's fill transparent and reveals the background color of the document.

See also

Method Detail

clone

()method
public function clone():BitmapFilter

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 10, AIR 1.5

Returns a copy of this filter object.

Returns
BitmapFilter — A new BevelFilter instance with all the same properties as the original BevelFilter instance.
BevelFilterExample.mxml
<?xml version="1.0"?>
<!-- filters/examples/BevelFilterExample.mxml -->
<s:Application 
    xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:mx="library://ns.adobe.com/flex/mx" 
    xmlns:s="library://ns.adobe.com/flex/spark" 
    creationComplete="createFilters()">
    
  <fx:Script><![CDATA[ 
     import spark.filters.*;
     import flash.filters.BitmapFilterQuality;
     import flash.filters.BitmapFilterType;
  
     private var myBevelFilter:BevelFilter;  
     private var color:Number = 0xFF33FF;
  
     public function createFilters():void {        
        myBevelFilter = new BevelFilter(5, 45, 0xFFFF00, .8, 0x0000FF, .8, 3, 3, 1, BitmapFilterQuality.MEDIUM, BitmapFilterType.INNER, false);
        b1.filters = [myBevelFilter];
     }
  
  ]]></fx:Script>

    <s:VGroup>
        <!-- This button has a filter applied in ActionScript. -->
        <s:Button id="b1" label="Click me"/>
        
        <!-- This button has a filter applied in MXML. -->
        <s:Button id="b2" label="Click me">
            <s:filters>
                <s:BevelFilter 
                    distance="5"
                    angle="45"
                    highlightColor="0xFFFF00"
                    highlightAlpha=".8"
                    shadowColor="0x0000FF"
                    shadowAlpha=".8"                    
                    blurX="3" 
                    blurY="3" 
                    strength="1"
                    quality="{BitmapFilterQuality.MEDIUM}"
                    type="{BitmapFilterType.INNER}"
                    knockout="false"/>
            </s:filters>
        </s:Button>
        
    </s:VGroup>        
</s:Application>