Asian language (Thai) not displaying correctly

Question

Hi,
I am using a the downloaded TextFlow Hello World example to display text (Flash CS4). Thai language characters show up as rectangles while Chinese (Simplified and Traditional) and Spanish show up correctly. Weird thing is that I also use a standard ComboBox component in my UI as language selector; and the word "ภาษาไทย" (Thai) showed up correctly in it. (So I am guessing that's because the ComboBox is using TextField instead of TLF).
I tried to set CharacterFormat.locale but it doesn't seem to have any effect.
Thanks.

Answer 1

Why do not use "Tahoma" font as font fallback in FTE for Thai language for Windows XP?
"Tahoma" font comes with Windows XP English installation, while Angsana New font becomes available on English Windows XP only after enabling "East Asian" language support.
And text rendered with "Angsana New" looks pretty bad, compared to the text displayed by the help of  "Arial" font.
Test application that display Thai characters:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx">
    <s:layout>
        <s:VerticalLayout paddingLeft="10"/>
    </s:layout>
    <fx:Declarations>       
        <fx:String id="str">สิทธิ์เรียกร้องค่าเสียหาย The quick brown fox jumped over the lazy dog.</fx:String>
    </fx:Declarations>       
    <mx:Label id="lbl"
              text="{str}"                           
              fontFamily="Tahoma"
              fontSize="16" />       
    <s:Label id="lbl2"
              text="{str}"                           
              fontFamily="Tahoma"
              fontSize="16" />
    <mx:Label id="lbl3"
              text="{str}"                           
              fontFamily="Ansgana New"
              fontSize="16" />
    <s:Label id="lbl4"
              text="{str}"                           
              fontFamily="Angsana New"
              fontSize="16" />
</s:Application>
Screenshot of the running app: http://twitpic.com/1f3kb1/full