- From: Gregg Vanderheiden <gv@trace.wisc.edu>
- Date: Fri, 08 Jun 2007 10:54:09 -0500
- To: 'Charles McCathieNevile' <chaals@opera.com>, 'Loretta Guarino Reid' <lorettaguarino@google.com>, "'Schnabel, Stefan'" <stefan.schnabel@sap.com>
- Cc: "'Cooperman, Michael J'" <michael.j.cooperman@sap.com>, 'Aaron M Leventhal' <aleventh@us.ibm.com>, wai-xtech@w3.org
We need to be careful here. ZOOM is being used in two different ways. To avoid this in WCAG we 1) use ZOOM to refer ONLY to a full image zoom. It is like magnifying the page (though sometimes font smoothing occurs) 2) use FONT SCALING or SIZING with WRAP to refer to changing the font size in a way that causes relayout of the page - or staying within horizontal width. (so there is no horizontal scrolling) With ZOOM there should never be a layout integrity problem if a true ZOOM since the layout is just magnified. With RESIZING with WRAP ( fluid layout etc) then you do. PS I am not saying that everyone needs to use these definitions, just that you need to remember them in interpreting the WCAG guidelines. Gregg -- ------------------------------ Gregg C Vanderheiden Ph.D. > -----Original Message----- > From: wai-xtech-request@w3.org > [mailto:wai-xtech-request@w3.org] On Behalf Of Charles McCathieNevile > Sent: Friday, June 08, 2007 3:30 AM > To: Loretta Guarino Reid; Schnabel, Stefan > Cc: Gregg Vanderheiden; Cooperman, Michael J; Aaron M > Leventhal; wai-xtech@w3.org > Subject: Re: ]RE: Relative Units for Font Size Scaling W3C > requirement replaced by zoom techniques in new Browsers? > > > On Wed, 23 May 2007 17:43:29 +0200, Loretta Guarino Reid > <lorettaguarino@google.com> wrote: > > > > > On 5/23/07, Schnabel, Stefan <stefan.schnabel@sap.com> wrote: > > >> Advantage for Zoom is that it does enlarge images > proportionally also. > > Indeed. > > >> Questions now: > >> > >> a) is Greggs Level AA rating when using zoom correct? Is > that sufficient > >> success criteria for W3C regarding font scaling? > > > > Whether such browser functionality can be used to satisfy this AA > > success criterion depends upon which browsers are used by the target > > audience. If only IE7 supports zoom and your users are not > using IE7, > > you need to use other techniques such as scalable fonts. > > In fact IE7 is one of the last browsers to do zoom - only > about a decade > after it started appearing in browsers. On the other hand, I > only know of > a couple of mobile browsers that provide zoom, and I suspect > it is still > an issue for now. > > >> b) will the sections that reccommend to use em units be > modified to > >> reflect new zooming techniques in browsers? > > > > No, using scalable fonts is still a sufficient technique to satisfy > > this success criterion. > > > >> b) is horizontal scrolling when using zoom a no-go for > accessibility or > >> is it more a usability issue and a consequecne of AA > classification? > > > > It is an accessibility issue, which is why it is included in WCAG. > > However, there is some content for which it will not be possible to > > scale the content in a way that doesn't require horizontal scaling > > (e.g. large complex data tables). > > Well, using a table transformation tool it is possible to > avoid it, but > people don't generally do that :( On the other hand using > something like > fit-to-width in combination with zoom wil deal with some of > the issue - by > breaking anything that you used to try and force your site to > maintain a > particular layout. Adaptive layout is still an important > technique for > users, so building a layout that can handle being adapted is > a pretty good > idea. > > cheers > > chaals > > -- > Charles McCathieNevile, Opera Software: Standards Group > hablo español - je parle français - jeg lærer norsk > chaals@opera.com Catch up: Speed Dial http://opera.com > > >
Received on Friday, 8 June 2007 15:54:19 UTC