| Pacchetto | spark.filters |
| Classe | public class BlurFilter |
| Ereditarietà | BlurFilter  BaseFilter EventDispatcher Object |
| Implementa | IBitmapFilter |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | 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.
Sintassi MXML
Mostra sintassi MXML
Nascondi sintassi MXMLThe <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"
/>
Altri esempi
Elementi API correlati
flash.display.DisplayObject.filters
flash.display.DisplayObject.cacheAsBitmap
flash.display.BitmapData.applyFilter()
| Proprietà | Definito da | ||
|---|---|---|---|
| blurX : Number
The amount of horizontal blur. | BlurFilter | ||
| blurY : Number
The amount of vertical blur. | BlurFilter | ||
 | constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| quality : int
The number of times to apply the filter. | BlurFilter | ||
| Metodo | Definito da | ||
|---|---|---|---|
Constructor. | BlurFilter | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento. | EventDispatcher | |
Returns a copy of this filter object. | BlurFilter | ||
|
Invia un evento nel flusso di eventi. | EventDispatcher | |
|
Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento. | EventDispatcher | |
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
|
Propagates a change event when the filter has changed. | BaseFilter | |
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | |
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
|
Restituisce la rappresentazione in formato stringa dell'oggetto specificato. | Object | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher | |
blurX | proprietà |
blurX:Number| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | 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.
Il valore predefinito è 4.0.
Implementazione
public function get blurX():Number public function set blurX(value:Number):voidblurY | proprietà |
blurY:Number| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | 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.
Il valore predefinito è 4.0.
Implementazione
public function get blurY():Number public function set blurY(value:Number):voidquality | proprietà |
quality:int| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | 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.
Il valore predefinito è "low".
Implementazione
public function get quality():int public function set quality(value:int):voidBlurFilter | () | Funzione di costruzione |
public function BlurFilter(blurX:Number = 4.0, blurY:Number = 4.0, quality:int = 1)| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | Flash Player 10, AIR 1.5 |
Constructor. The default values create a soft, unfocused image.
ParametriblurX: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 | () | metodo |
public function clone():BitmapFilter| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | Flash Player 10, AIR 1.5 |
Returns a copy of this filter object.
RestituisceBitmapFilter — 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>
Tue Jun 12 2018, 02:44 PM Z