套件 | spark.filters |
類別 | public class DropShadowFilter |
繼承 | DropShadowFilter ![]() ![]() ![]() ![]() |
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 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 thefilters
property of an object does not modify the object, and you can remove the filter by clearing thefilters
property. - To apply filters to BitmapData objects, use the
BitmapData.applyFilter()
method. CallingapplyFilter()
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
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.) 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 語法
The <s:DropShadowFilter>
tag inherits all of the tag
attributes of its superclass and adds the following tag attributes:
<s:DropShadowFilter Properties alpha="1" angle="45" color="0xFF0000" distance="4" hideObject="false" inner="false" />
更多範例
相關 API 元素
屬性 | 定義自 | ||
---|---|---|---|
alpha : Number
The alpha transparency value for the color. | DropShadowFilter | ||
angle : Number
The angle of the bevel. | DropShadowFilter | ||
![]() | blurX : Number
The amount of horizontal blur. | BaseDimensionFilter | |
![]() | blurY : Number
The amount of vertical blur. | BaseDimensionFilter | |
color : uint
The color of the glow. | DropShadowFilter | ||
![]() | constructor : Object
類別物件的參照或是特定物件實體的建構函數。 | Object | |
distance : Number
The offset distance of the bevel. | DropShadowFilter | ||
hideObject : Boolean
Indicates whether or not the object is hidden. | DropShadowFilter | ||
inner : Boolean
Specifies whether the glow is an inner glow. | DropShadowFilter | ||
![]() | 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 |
方法 | 定義自 | ||
---|---|---|---|
DropShadowFilter(distance:Number = 4.0, angle:Number = 45, color:uint = 0, alpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1.0, quality:int = 1, inner:Boolean = false, knockout:Boolean = false, hideObject:Boolean = false)
Constructor. | DropShadowFilter | ||
![]() | 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 | |
Returns a copy of this filter object. | DropShadowFilter | ||
![]() |
會將事件傳送到事件流程。 | EventDispatcher | |
![]() |
會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。 | EventDispatcher | |
![]() |
指出物件是否有已定義的指定屬性。 | Object | |
![]() |
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 | |
![]() |
Propagates a change event when the filter has changed. | BaseFilter | |
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指出指定的屬性是否存在,以及是否可列舉。 | Object | |
![]() |
會從 EventDispatcher 物件移除偵聽程式。 | EventDispatcher | |
![]() |
為迴圈作業設定動態屬性的可用性。 | Object | |
![]() |
傳回代表此物件的字串,根據地區特定慣例進行格式化。 | Object | |
![]() |
會傳回指定之物件的字串形式。 | Object | |
![]() |
會傳回指定之物件的基本值。 | Object | |
![]() |
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 |
alpha | 屬性 |
angle | 屬性 |
angle: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 angle of the bevel. 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.
預設值為 45。
實作
public function get angle():Number
public function set angle(value:Number):void
color | 屬性 |
distance | 屬性 |
hideObject | 屬性 |
hideObject: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 |
Indicates whether or not the object is hidden.
The value true
indicates that the
object itself is not drawn; only the shadow is visible.
The default is false
, meaning that the object is shown.
預設值為 false。
實作
public function get hideObject():Boolean
public function set hideObject(value:Boolean):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
that creates 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
DropShadowFilter | () | 建構函式 |
public function DropShadowFilter(distance:Number = 4.0, angle:Number = 45, color:uint = 0, alpha:Number = 1.0, blurX:Number = 4.0, blurY:Number = 4.0, strength:Number = 1.0, quality:int = 1, inner:Boolean = false, knockout:Boolean = false, hideObject: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distance:Number (default = 4.0 ) — Offset distance for the shadow, in pixels.
| |
angle:Number (default = 45 ) — Angle of the shadow, 0 to 360 degrees (floating point).
| |
color:uint (default = 0 ) — Color of the shadow, in hexadecimal format
0xRRGGBB. The default value is 0x000000.
| |
alpha:Number (default = 1.0 ) — Alpha transparency value for 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 ) — Amount of horizontal blur. Valid values are 0 to 255.0 (floating point).
| |
blurY:Number (default = 4.0 ) — Amount of vertical blur. Valid values are 0 to 255.0 (floating point).
| |
strength:Number (default = 1.0 ) — The strength of the imprint or spread. The higher the value,
the more color is imprinted and the stronger the contrast between the shadow and the background.
Valid values are 0 to 255.0.
| |
quality:int (default = 1 ) — The number of times to apply the filter. Use the BitmapFilterQuality constants:
For more information about these values, see the | |
inner:Boolean (default = false ) — Indicates whether or not the shadow is an inner shadow. A value of true specifies
an inner shadow. A value of false specifies an outer shadow (a
shadow around the outer edges of the object).
| |
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.
| |
hideObject:Boolean (default = false ) — Indicates whether or not the object is hidden. A value of true
indicates that the object itself is not drawn; only the shadow is visible.
|
相關 API 元素
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 DropShadowFilter instance with all the
properties of the original DropShadowFilter instance.
|
<?xml version="1.0"?> <!-- filters/examples/DropShadowFilterExample.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 myDropShadowFilter:DropShadowFilter; private var color:Number = 0xFF33FF; public function createFilters():void { myDropShadowFilter = new DropShadowFilter(15, 45, color, 0.8, 8, 8, 0.65, BitmapFilterQuality.MEDIUM, false, false); b1.filters = [myDropShadowFilter]; } ]]></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:DropShadowFilter distance="15" angle="45" color="0xFF33FF" alpha=".8" blurX="8" blurY="8" strength=".65" quality="{BitmapFilterQuality.MEDIUM}" inner="false" knockout="false"/> </s:filters> </s:Button> </s:VGroup> </s:Application>
Tue Jun 12 2018, 03:47 PM Z