- From: Markku T. Hakkinen <hakkinen@dev.prodworks.com>
- Date: Mon, 10 Aug 1998 23:42:30 -0400
- To: <w3c-wai-ig@w3.org>
For those of us who do not happen to have Notes available to them, can someone post a URL or provide sample files that demonstrate the twistie? I have a feeling I have seen this in a variety of pages using straight HTML links, DHTML, and ActiveX, resulting in a situation where we have the same UI implemented via different techniques. Mark > -----Original Message----- > From: w3c-wai-ig-request@w3.org [mailto:w3c-wai-ig-request@w3.org]On > Behalf Of Leonard R. Kasday > Sent: Monday, August 10, 1998 7:53 PM > To: Al Gilman; w3c-wai-ig@w3.org > Cc: w3c-wai-cg@w3.org > Subject: Re: Twisties re notes/domino > > > One possibility is to simply give users direct access to the > hierarchy, via > the following functions > > parent > child > next/prevous sibling(s). > > This does functionally some of what the accordion list does for sighted > users, viz ability to quickly get items for above relationships. > > There is problem of getting lost as to which level you're in. > Perhaps some > explicit audio label (e.g. "level 1" preceding output) would do the trick. > Or Raman's audio techniques. > > Len > > At 10:02 AM 8/10/98 -0400, Al Gilman wrote: > >[follow-up to discussion of the Lotus Notes/Domino implementation > >of expanding lists with inscrutable "+/-" link text on twisties.] > > > >The existing rule about "use meaningful link text" explains why > >using plus and minus as the link text for twisties does not work > >for screen reader users. But it does not really tell you what to > >do about it because a long substitution would get tedious even in > >speech. We probably need to step back and see what the twisties > >are doing for us to understand the problem. > > > >Twisties are used as controls inside what we might call > >"accordion lists" by analogy to "accordion file" containers for > >information on paper. These are list structures similar to a > >table of contents that the user interface lets you fold and > >expand on a section by section basis. Users of MacOS since > >version 7 and Microsoft Windows since Windows 95 will be familiar > >with this in the file system interface. > > > >The problem is that the visual user can see where the un-changed > >parts of the list come back in the adjusted list presentation. > >It is not similarly easy to perceive the structure in terms of > >changed and unchanged segments in audio, so far as I know. > > > >Accordion lists are visual context-savers for exploring > >hierarchical information structures. I might even say that > >accordion lists are a best current practice for this function. > >If there is a comparable best current practice for saving context > >inside a hierarchical domain, in the context of an audio user > >interface, I don't know what it is. > > > >What to do about it? This could easily get technical enough and > >voluble enough to be worth moving off the general interest list. > > > >There are several groups that are potentially affected: User > >Agent, Page Author, Authoring Tools, Protocols and Formats. > >Maybe we should try an ad-hoc action team. > > > >If people will volunteer to work on how to make accordion lists > >accessible, then we can move the discussion off the Interest > >Group list. The WAI Coordination Group <w3c-wai-cg@w3.org> can > >worry about what sort of a coordination process will keep the > >interested groups tuned in. > > > >Al Gilman > > > >PS: > > > >HTML 4 already has the functionality suggested as LABELFOR for > >form controls, but not for general links. > > > >The usability concerns are the same whether the interface > >behavior is done with Javascript or CGI. > > > > > > > ------- > Leonard R. Kasday > Institute on Disabilities at Temple University > kasday@acm.org > telephone (215} 204 2247 > Chair, Web Accessibility Inititative Evaluation and Repair Interest Group > http://www.w3.org/WAI/ER/ > >
Received on Monday, 10 August 1998 23:42:17 UTC