Creare un testo con ombreggiatura in AS3

Question

Sto cercando di creare un testo semplice con un'ombra esterna in ActionScript 3.0; ad esempio:

_tf = new TextField(); 
_tf.autoSize = TextFieldAutoSize.CENTER; 
_tf.selectable = false; 
var format:TextFormat = new TextFormat(); 
format.font = "Arial"; 
format.bold = true; 
format.color = 0xffffff; 
format.size = 12; 
_tf.text = "Drop shadow"; 
_tf.defaultTextFormat = format; 
addChild(_tf); 

Come posso ottenere questo testo con un'ombra esterna ??

Answer 1

_tf.filters = [new DropShadowFilter()]; 

Answer 2

o anche meglio;

_tf.filters = [filter(4,153,0xffffff,0.7,4,4,0.7,0.15,false,false,false)]; 

function filter(distance, angle, color, alpha, blurX, blurY, strength, quality, inner, knockout, hideObject){ 
    return new DropShadowFilter(distance, angle, color, alpha, blurX, blurY, strength, quality, inner, knockout, hideObject); 
} 

altro modo:

_tf.filters = [new DropShadowFilter(4.0,45,0x000000,1.0,4.0,4.0,1.0,1,false,true,false)]; 
/* 
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); 

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 
*/ 

documentazione qui: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/filters/DropShadowFilter.html