Hi Alex,
Is truly rich, is a web to print solution Enterprise application that i join on 
the last 5 months.
Why i wish a solution like this:To make what the user see on the web  and get 
it on the PDF.The PDF creator uses SVG embebed fonts and when the user set 
underline we have different results.
I could draw the lines with the example of justin from the post:
--------------------------------------------------------------------------------------From
 inside createTextLinesFromTextBlock method in FTETextField.                    
// FTE doesn't render underlines,                    // but it can tell us 
where to draw them.                    // You can't draw in a TextLine but it 
can have children,                    // so we create a child Shape to draw 
them in.                                        var fontMetrics:FontMetrics;    
                if (fontContext)                        fontMetrics = 
fontContext.callInContext(elementFormat.getFontMetrics, elementFormat, []);     
               else                        fontMetrics = 
elementFormat.getFontMetrics();                                        var 
shape:Shape = new Shape();                    var g:Graphics = shape.graphics;  
                  g.lineStyle(fontMetrics.underlineThickness,                   
      elementFormat.color, elementFormat.alpha);                    g.moveTo(0, 
fontMetrics.underlineOffset);                    g.lineTo(textLine.textWidth, 
fontMetrics.underlineOffset);
--------------------------------------------------------------------------------------
but i don't know on the RTE where i can override the TextBlock that creates the 
textlines/underline.
In on component RTE all the text is underline i dont have parcial text 
underline.

I have my extended RTE with just textValidation (if font have glyph) and font 
face validation.

What looks easy to underline gap and thickness is not so easy i tough that i 
could add this to TLF configuration but not.What i read is that FontMetrics 
have the metrics of the embebed fonts as i said i tried to fake this class but 
also with no success..(maybe the wrong solution/perspective).




> From: aha...@adobe.com
> To: users@flex.apache.org
> Date: Fri, 28 Jun 2013 08:14:11 -0700
> Subject: Re: Text flow underline
> 
> Hi Miguel,
> 
> I think RET uses TLF to draw the underlines which relies on FontMetrics.
> Is this text truly "rich" (different font families, sizes and styles) or
> single font?
> 
> -Alex
> 
> On 6/28/13 7:57 AM, "Miguel Ferreira" <miguel.cd.ferre...@hotmail.com>
> wrote:
> 
> >Hi Justin and Alex,
> >I am using RichEditableText. (When i enter on this project that option
> >was already taken).I tried to convince them to use a smaller component to
> >present the text and use a heavy one for edition, but without success.
> >@Justin: i am checking now that link.
> >If i have some good solution i will try to post it here.
> >
> >> From: aha...@adobe.com
> >> To: users@flex.apache.org
> >> Date: Fri, 28 Jun 2013 07:38:25 -0700
> >> Subject: Re: Text flow underline
> >> 
> >> Are you using a Flex component like RichText or Label?  Or are you just
> >> using TLF or FTE directly?
> >> 
> >> On 6/28/13 4:10 AM, "Miguel Ferreira" <miguel.cd.ferre...@hotmail.com>
> >> wrote:
> >> 
> >> >Hi Alex,
> >> >Thank you for the help... you always have time to say something.. that
> >>is
> >> >admirable!
> >> >The FontMetrics class have all the information about of the font on
> >>this
> >> >case:- underlineOffset- underlineThickness
> >> >I tried to fake it (maybe wrongly)!
> >> >I create a class with the same name and same package on the src, hoping
> >> >that the compiler will use my class instead the one on the sdk, with
> >>this
> >> >constructor, code example:
> >> >public function FontMetrics(emBox:Rectangle,
> >>strikethroughOffset:Number,
> >> >strikethroughThickness:Number, underlineOffset:Number,
> >> >underlineThickness:Number, subscriptOffset:Number,
> >>subscriptScale:Number,
> >> >superscriptOffset:Number, superscriptScale:Number)                {       
> >> >                this.emBox =
> >> >emBox;                                            
> >> >this.strikethroughOffset =
> >> >strikethroughOffset;                      this.strikethroughThickness =
> >> >strikethroughThickness;                                           
> >> >this.subscriptOffset =
> >> >subscriptOffset;                  this.subscriptScale =
> >> >subscriptScale;                                           
> >> >this.superscriptOffset =
> >> >superscriptOffset;                        this.superscriptScale =
> >> >superscriptScale;                                         
> >> >this.underlineOffset =
> >> >0;                        this.underlineThickness = 10;           }
> >> >
> >> >but when i trace the the underline properties i never the 0 and 10.
> >> >Even if the compiler get the project class instead of the SDK i also
> >> >don't know if the text line engine will use this values...
> >> >If someone have some idea... they are welcome!
> >> >Thank you,Miguel
> >> >
> >> >> From: aha...@adobe.com
> >> >> To: users@flex.apache.org
> >> >> Date: Thu, 27 Jun 2013 13:04:43 -0700
> >> >> Subject: Re: Text flow underline
> >> >> 
> >> >> I don't know for sure, but you can try manipulating the fontMetrics.
> >> >>See
> >> >> flash.text.engine.FontMetrics
> >> >> 
> >> >> On 6/27/13 7:30 AM, "Miguel Ferreira"
> >><miguel.cd.ferre...@hotmail.com>
> >> >> wrote:
> >> >> 
> >> >> >Hi guys,
> >> >> >i have a question :)
> >> >> >Can we set the padding between letter and the underline?
> >> >> >maybe 2 questions!
> >> >> >Can we set the thickness of the underline?
> >> >> >
> >> >> >Thanks!                                        
> >> >> 
> >> >                                    
> >> 
> >                                       
> 
                                          

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