| Pakket | spark.filters |
| Klasse | public class BlurFilter |
| Overerving | BlurFilter  BaseFilter EventDispatcher Object |
| Implementatie | IBitmapFilter |
| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
quality property
of this filter is set to low, the result is a softly unfocused look.
When the quality property is set to high, it approximates a Gaussian blur
filter. 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 BlurFilter().
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
filtersproperty (inherited from DisplayObject). Setting thefiltersproperty of an object does not modify the object, and you can remove the filter by clearing thefiltersproperty. - 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 cacheAsBitmap property of the
display 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 (scaleX and scaleY are not set to 100%), the
filter effect 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-syntaxis
MXML-syntaxis weergeven
MXML-syntaxis verbergenThe <s:BlurFilter> tag inherits all of the tag
attributes of its superclass and adds the following tag attributes:
<s:BlurFilter
Properties
blurX="4.0"
blurY="4.0"
quality="low"
/>
Meer voorbeelden
Verwante API-elementen
flash.display.DisplayObject.filters
flash.display.DisplayObject.cacheAsBitmap
flash.display.BitmapData.applyFilter()
| Eigenschap | Gedefinieerd door | ||
|---|---|---|---|
| blurX : Number
The amount of horizontal blur. | BlurFilter | ||
| blurY : Number
The amount of vertical blur. | BlurFilter | ||
 | constructor : Object
Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie. | Object | |
| quality : int
The number of times to apply the filter. | BlurFilter | ||
| Methode | Gedefinieerd door | ||
|---|---|---|---|
Constructor. | BlurFilter | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registreert een gebeurtenislistenerobject bij een object EventDispatcher, zodat de listener een melding van een gebeurtenis ontvangt. | EventDispatcher | |
Returns a copy of this filter object. | BlurFilter | ||
|
Verzendt een gebeurtenis naar de gebeurtenisstroom. | EventDispatcher | |
|
Controleert of het object EventDispatcher listeners heeft geregistreerd voor een specifiek type gebeurtenis. | EventDispatcher | |
|
Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd. | Object | |
|
Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven. | Object | |
|
Propagates a change event when the filter has changed. | BaseFilter | |
|
Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd. | Object | |
|
Verwijdert een listener uit het object EventDispatcher. | EventDispatcher | |
|
Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in. | Object | |
|
Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies. | Object | |
|
Retourneert een tekenreeksrepresentatie van het opgegeven object. | Object | |
|
Retourneert de primitieve waarde van het opgegeven object. | Object | |
|
Controleert of een gebeurtenislistener is geregistreerd bij dit object EventDispatcher of een van de voorouders voor het opgegeven type gebeurtenis. | EventDispatcher | |
blurX | eigenschap |
blurX:Number| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
The amount of horizontal blur. Valid values are 0 to 255. A blur of 1 or less means that the original image is copied as is. The default value is 4. Values that are a power of 2 (such as 2, 4, 8, 16, and 32) are optimized to render more quickly than other values.
De standaardwaarde is 4.0.
Implementatie
public function get blurX():Number public function set blurX(value:Number):voidblurY | eigenschap |
blurY:Number| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
The amount of vertical blur. Valid values are 0 to 255. A blur of 1 or less means that the original image is copied as is. The default value is 4. Values that are a power of 2 (such as 2, 4, 8, 16, and 32) are optimized to render more quickly than other values.
De standaardwaarde is 4.0.
Implementatie
public function get blurY():Number public function set blurY(value:Number):voidquality | eigenschap |
quality:int| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
The number of times to apply the filter. The default value is
BitmapFilterQuality.LOW, which is equivalent to applying the filter
once. The value BitmapFilterQuality.MEDIUM applies the filter twice;
the value BitmapFilterQuality.HIGH applies it three times. Filters
with lower values are rendered more quickly.
For most applications, a quality value of low, medium, or high is
sufficient. Although you can use additional numeric values up to 15
to achieve different effects, higher values are rendered more slowly.
Instead of increasing the value of quality, you can often get a similar
effect, and with faster rendering, by simply increasing the values of
the blurX and blurY properties.
De standaardwaarde is "low".
Implementatie
public function get quality():int public function set quality(value:int):voidBlurFilter | () | Constructor |
public function BlurFilter(blurX:Number = 4.0, blurY:Number = 4.0, quality:int = 1)| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
Constructor. The default values create a soft, unfocused image.
ParametersblurX:Number (default = 4.0) | |
blurY:Number (default = 4.0) | |
quality:int (default = 1)
High quality approximates a Gaussian blur. For most applications, these three values are sufficient. Although you can use additional numeric values up to 15 to achieve different effects, be aware that higher values are rendered more slowly. |
clone | () | methode |
public function clone():BitmapFilter| Taalversie: | ActionScript 3.0 |
| Productversie: | Flex 4 |
| Runtimeversies: | Flash Player 10, AIR 1.5 |
Returns a copy of this filter object.
Geretourneerde waardeBitmapFilter — A new BlurFilter instance with all the same
properties as the original BlurFilter instance.
|
<?xml version="1.0"?>
<!-- filters/examples/BlurFilterExample.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 myBlurFilter:BlurFilter;
private var color:Number = 0xFF33FF;
public function createFilters():void {
myBlurFilter = new BlurFilter(3, 3, BitmapFilterQuality.MEDIUM);
b1.filters = [myBlurFilter];
}
]]></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:BlurFilter
blurX="3"
blurY="3"
quality="{BitmapFilterQuality.MEDIUM}"/>
</s:filters>
</s:Button>
</s:VGroup>
</s:Application>
Wed Jun 13 2018, 11:42 AM Z