Yeah, same experience here.  This piece of code may help you:

http://code.google.com/p/flex2treemap/source/browse/trunk/source/com/flextoolbox/utils/FlexFontUtil.as?spec=svn131&r=131

Josh



________________________________
From: Glen Pike <[email protected]>
To: Flash Coders List <[email protected]>
Sent: Tue, April 6, 2010 10:06:45 AM
Subject: Re: [Flashcoders] Adapt textfield font to textfield size

Hi,

    I had to do something similar - loop down the size until it fits :(  
Sorry, no joy here...

    Glen

mika wrote:
> Hi,
>
> I am creating textfields in zones with differents width and heights. The
> content of textfiels depends on user input.
> I'd like to change the font size of the textfield so that the text is fully
> displayed (using wordwrap=true and autoSize)
>
> I could imagine a testing loop that decreases  textfield font until it has
> appropriate size, but that sounds rather nasty.
>
> Anyone can think of a cleaner approach ? This is AS3
>
> Thanks
> _______________________________________________
> Flashcoders mailing list
> [email protected]
> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>
>  

-- 

Glen Pike
01326 218440
www.glenpike.co.uk<http://www.glenpike.co.uk>

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