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RE: WCAG2 - 1.4.1 - resizing

From: Gavin Thomas <Gavin.Thomas@uwe.ac.uk>
Date: Wed, 10 Nov 2010 17:14:10 +0000
To: Loretta Guarino Reid <lorettaguarino@google.com>
Cc: WCAG <w3c-wai-gl@w3.org>
Message-id: <A169BAD2C2DC6D418270CDC03DF5CDF433E35D5D63@EGEN-MBX02.campus.ads.uwe.ac.uk>
Thanks for this clarification Loretta. Most helpful

Now you've explained, it makes more sense.

For me it would be better to have it written as

"Ensuring that text containers resize when the text resizes:"

Techniques for text container resizing

    *SCR34: Calculating size and position in a way that scales with text size (Scripting)
    *G146: Using liquid layout

AND 

"using measurements that are relative to other measurements in the content by using one or more of the following techniques:

So you can link up the 1st half of the sentence to the sufficient techniques to meet the criteria



-----Original Message-----
From: Loretta Guarino Reid [mailto:lorettaguarino@google.com] 
Sent: 10 November 2010 17:09
To: Gavin Thomas
Cc: WCAG
Subject: Re: WCAG2 - 1.4.1 - resizing

Hi, Gavin,

The listed following techniques apply only to the second half of the sufficient technique, that is, the part after the AND. To use this technique, it is also necessary to ensure that the first half is met, that is, Ensuring that text containers resize when the text resizes.

Loretta

On Wed, Nov 10, 2010 at 8:59 AM, Gavin Thomas <Gavin.Thomas@uwe.ac.uk> wrote:
> Just for clarification I've been asked to assess some page templates 
> and am independent to the development of the pages
>
> The page in question uses 'percent' and 'em' units for font sizes. So it meets one of the techniques under:
>
> "2. Ensuring that text containers resize when the text resizes AND using measurements that are relative to other measurements in the content by using one or more of the following techniques:"
>
> But when I resize the page to 200% in IE8 there is a menu system which gets truncated at this size. Hence failing:
>
> F69: Failure of Success Criterion 1.4.4 when resizing visually 
> rendered text up to 200 percent causes the text, image or controls to 
> be clipped, truncated or obscured
>
> Unless the technique needs further clarification in that 'Ensuring that text containers resize when the text resizes..'
>
> Should be met with:
>
> C28: Specifying the size of text containers using em units (CSS).
>
> But it only states under the technique "by using one or more of the following techniques"
>
> (which is relative measurements for font sizes in this case)
>
>
>
>
> -----Original Message-----
> From: Loretta Guarino Reid [mailto:lorettaguarino@google.com]
> Sent: 10 November 2010 16:49
> To: Gavin Thomas
> Cc: WCAG
> Subject: Re: WCAG2 - 1.4.1 - resizing
>
> Gavin,
>
> Can you tell us what about your page is causing the failure?  You may have uncovered a problem with the technique.
>
> Loretta
>
> On Wed, Nov 10, 2010 at 8:23 AM, Gavin Thomas <Gavin.Thomas@uwe.ac.uk> wrote:
>> I'm a bit confused about the sufficient techniques and failures to 
>> meet this criterion
>>
>> So I have a page that will meet the one of the sufficient techniques:
>>
>> "2. Ensuring that text containers resize when the text resizes AND using measurements that are relative to other measurements in the content by using one or more of the following techniques:"
>>
>> http://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-scale.
>> html#visual-audio-contrast-scale-techniques-head
>>
>> By using
>>
>> Techniques for relative measurements:
>>
>> *C12: Using percent for font sizes (CSS)
>> *C13: Using named font sizes (CSS)
>> *C14: Using em units for font sizes (CSS)
>>
>> But it would fail for
>>
>> F69: Failure of Success Criterion 1.4.4 when resizing visually 
>> rendered text up to 200 percent causes the text, image or controls to 
>> be clipped, truncated or obscured
>>
>> But in the documentation is states:
>>
>> "Any of the listed sufficient techniques can be used to meet the success criterion"
>>
>> So in this scenario it will meet one of sufficient techniques (as 
>> mentioned above) but it also meets the common failure F69
>>
>> So can both occur?
>>
>>
>>
>>
>
Received on Wednesday, 10 November 2010 17:16:00 GMT

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