GlowFilter

套件	spark.filters
類別	public class GlowFilter
繼承	GlowFilter BaseDimensionFilter BaseFilter EventDispatcher Object
實作	IBitmapFilter

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

The GlowFilter class lets you apply a glow effect to display objects. You have several options for the style of the glow, including inner or outer glow and knockout mode. The glow filter is similar to the drop shadow filter with the distance and angle properties of the drop shadow filter set to 0. 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.

The use of filters depends on the object to which you apply the filter:

To apply filters to display objects, 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 cacheAsBitmap property of the display object is set to true. If you clear 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 scaleX and scaleY are set to a value other than 1.0), 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.) For example, if 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 語法

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

  <s:GlowFilter
    Properties
    alpha="1"
    color="0xFF0000"
    inner="false"
  />

更多範例

公用屬性

	屬性		定義自
		alpha : Number The alpha transparency value for the color.	GlowFilter
		blurX : Number The amount of horizontal blur.	BaseDimensionFilter
		blurY : Number The amount of vertical blur.	BaseDimensionFilter
		color : uint The color of the glow.	GlowFilter
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		inner : Boolean Specifies whether the glow is an inner glow.	GlowFilter
		knockout : Boolean Specifies whether the object has a knockout effect.	BaseDimensionFilter
		quality : int The number of times to apply the filter.	BaseDimensionFilter
		strength : Number The strength of the imprint or spread.	BaseDimensionFilter

公用方法

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	方法		定義自
		GlowFilter(color:uint = 0xFF0000, alpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1, quality:int = 1, inner:Boolean = false, knockout:Boolean = false) Constructor.	GlowFilter
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void 會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。	EventDispatcher
		clone():BitmapFilter Returns a copy of this filter object.	GlowFilter
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		hasEventListener(type:String):Boolean 會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。	EventDispatcher
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		isPrototypeOf(theClass:Object):Boolean 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		notifyFilterChanged():void Propagates a change event when the filter has changed.	BaseFilter
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void 為迴圈作業設定動態屬性的可用性。	Object
		toLocaleString():String 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		valueOf():Object 會傳回指定之物件的基本值。	Object
		willTrigger(type:String):Boolean 檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。	EventDispatcher

事件

按一下以瞭解事件的詳細資訊

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	事件		摘要	定義自
		activate	[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。	EventDispatcher
		deactivate	[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。	EventDispatcher

公用常數

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	常數		定義自

屬性詳細資訊

alpha

屬性

alpha:Number

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

The alpha transparency value for the color. Valid values are 0 to 1. For example, .25 sets a transparency value of 25%.

預設值為 1。

實作
public function get alpha():Number
public function set alpha(value:Number):void

color

屬性

color:uint

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

The color of the glow. Valid values are in the hexadecimal format 0xRRGGBB.

預設值為 0xFF0000。

實作
public function get color():uint
public function set color(value:uint):void

inner

屬性

inner:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Specifies whether the glow is an inner glow. The value true indicates an inner glow. The default is false, meaning an outer glow (a glow around the outer edges of the object).

預設值為 false。

實作
public function get inner():Boolean
public function set inner(value:Boolean):void

建構函式詳細資料

()

建構函式

public function GlowFilter(color:uint = 0xFF0000, alpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1, quality:int = 1, inner:Boolean = false, knockout:Boolean = false)

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Constructor.

參數

	`color:uint` (default = `0xFF0000`) — The color of the glow, in the hexadecimal format 0xRRGGBB. The default value is 0xFF0000.

	`alpha:Number` (default = `1.0`) — The alpha transparency value for the color. Valid values are 0 to 1. For example, .25 sets a transparency value of 25%.

	`blurX:Number` (default = `4.0`) — The amount of horizontal blur. Valid values are 0 to 255 (floating point). Values that are a power of 2 (such as 2, 4, 8, 16 and 32) are optimized to render more quickly than other values.

	`blurY:Number` (default = `4.0`) — The amount of vertical blur. Valid values are 0 to 255 (floating point). Values that are a power of 2 (such as 2, 4, 8, 16 and 32) are optimized to render more quickly than other values.

	`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 glow and the background. Valid values are 0 to 255.

	`quality:int` (default = `1`) — The number of times to apply the filter. Use the BitmapFilterQuality constants: `BitmapFilterQuality.LOW` `BitmapFilterQuality.MEDIUM` `BitmapFilterQuality.HIGH` For more information, see the description of the `quality` property.

	`inner:Boolean` (default = `false`) — Specifies whether the glow is an inner glow. The value `true` specifies an inner glow. The value `false` specifies an outer glow (a glow around the outer edges of the object).

	`knockout:Boolean` (default = `false`) — Specifies whether the object has a knockout effect. The value `true` makes the object's fill transparent and reveals the background color of the document.

相關 API 元素

BitmapFilterQuality

方法詳細資訊

clone

()

方法

public function clone():BitmapFilter

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Returns a copy of this filter object.

傳回值

BitmapFilter — A new GlowFilter instance with all the properties of the original GlowFilter instance.

範例如何使用本範例

GlowFilterExample.mxml

<?xml version="1.0"?>
<!-- filters/examples/GlowFilterExample .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 myGlowFilter:GlowFilter;  
     private var color:Number = 0xFF33FF;
  
     public function createFilters():void {        
        myGlowFilter = new GlowFilter(color, .8, 6, 6, .65, BitmapFilterQuality.MEDIUM, 
            false, false);
        b1.filters = [myGlowFilter];
     }
  
  ]]></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:GlowFilter 
                    color="0xFF33FF" 
                    alpha=".8" 
                    blurX="6" 
                    blurY="6" 
                    strength=".65" 
                    quality="{BitmapFilterQuality.MEDIUM}"
                    inner="false" 
                    knockout="false"/>
            </s:filters>
        </s:Button>
        
    </s:VGroup>        
</s:Application>

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GlowFilter - AS3 Flex

類別 x

alpha

color

inner

GlowFilter

clone