Flash Text Engine (FlashÎı¾ÒýÇæ)

Ô­ÎĵØÖ·:http://www.insideria.com/2009/03/flash-text-engine.html      ×÷Õß:Veronique Brossier
TextBlock - ÓÃÓÚ´´½¨Îı¾¿é(¶ÎÂä)µÄ¼¯ºÏ,²»ÊÇÏÔʾ¶ÔÏó
textLine - TextBlockµÄÒ»ÐÐ,ÊÇÏÔʾ¶ÔÏó
contentElement - ·ÅÈëTextBlockµÄÄÚÈÝ(Îı¾TextElement ,ͼÏñGraphicElement,Îı¾Í¼Ïñ×éºÏGroupElement) 
ElementFormat - ¶¨ÒåcontentElementµÄ¸ñʽ
fontDescription - ¶¨ÒåÓ¦ÓÃÓëelementFormatµÄ×ÖÌåµÄÑùʽ
ÕâÊÇÒ»¸öʹÓÃÀý×Ó:
import flash.text.engine.*;
var fd:FontDescription = new FontDescription();
var ef:ElementFormat = new ElementFormat(fd);
var te:TextElement = new TextElement("Hello world", ef);
var ge:GraphicsElement = new GraphicsElement(shape, shape.width,shape.height,ef);
var v:Vector.<ElementContent> = new Vector.<ElementContent>();
v.push(te,ge);
var group:GroupElement = new GroupElement(v);
var tb:TextBlock = new TextBlock();
tb.content = group;
var tl:TextLine = tb.createTextLine(null, 200);
addChild(tl);   
FontDescription
ͨ¹ýfontDescription¿ÉÒÔ¶¨Òå×ÖÌåÑùʽ,¶ÔÓÚÉ豸×ÖÌå,¿ÉÒÔÉèÖà fontPosture ºÍ bold fontWeight.¶ÔÓÚǶÈë×ÖÌå,ÀûÓà CFF ³ÊÏÖ,¿Éͨ¹ýС³ß´ç»ñµÃ¸ßÆ·ÖʵÄ×ÖÌå³ÊÏÖ.
Õâ¶Î´úÂëÏÔʾÄã¼ÆËã»úÖеÄ×ÖÌå:
import flash.text.Font;
import flash.text.engine.FontDescription;
// É豸×ÖÌå
var myFonts:Array = Font.enumerateFonts(true);
for (var i:int = 0; i < myFonts.length; i++) {
if (myFonts[i].fontType == "device") {
trace("I am a device font and my name is", myFonts[i].fontName);
}
}
// ǶÈë×ÖÌå
var myEmbeddedFonts:Array = Font.enumerateFonts(false);
var f:Font = myEmbeddedFonts[0];
trace(FontDescription.isFontCompatible(f.fontName, "normal", "normal"));
trace(FontDescription.isFontCompatible(f.fontName, "bold", "normal"));
trace(FontDescription.isFontCompatible(f.fontName, "normal", "italic"));
fontDescriptionÓ¦ÓÃÓÚ×î³õµÄelementFormat¶ÔÏóÈ»ºóËø¶¨,±ØÐë´´½¨fontDescription¶ÔÏóµÄ¸±±¾²ÅÄܹ»±»¸Ä±ä:
import flash.text.engine.*;
import flash.text.Font;
var fd = new FontDescription("PALAT