- From: Ian Jacobs <ij@w3.org>
- Date: Mon, 10 Jul 2000 11:51:13 -0400
- To: Jon Gunderson <jongund@uiuc.edu>
- CC: w3c-wai-ua@w3.org
Jon Gunderson wrote: > > Ian, > Another approach to resolve this issue is that while only one view port may > be available at a time, the user agent should keep a list of viewports > available and allow the user to switch between the view ports. Can you explain how this works? What does it mean for a viewport to be available but not open? Does that mean open but iconified? That is only considering the visual model. - Ian > Your > solution sounds OK too, but if a user decides not to open the navigation > frame, they may have problems using the Web page. Even with your proposed > solution, I think the user agent should keep track of available viewports > and allow the user to switch. I entirely agree that the user should be able to get easily at viewports that did not open; that's part of the checkpoint I proposed. - Ian > Jon > > At 03:42 PM 7/7/2000 -0400, Ian Jacobs wrote: > >Hello, > > > >I'm working on a new draft that I will publish later this > >afternoon. I'm reading the checkpoints to see how they > >fit together. So far, so good, but I have stumbled across > >a problem. In the 10 June Guidelines [1], we have the following > >checkpoints: > > > > 2.1 Make all content available through the user interface. [P1] > > Users must have access to the entire document object, > > including equivalent alternatives for content, attributes, > > style sheets, etc. through the user interface. This > > checkpoint does not require that all content be available > > in every view. A document source view is part of a > > solution for providing access to content, but is not > > a sufficient solution on its own. > > > > 4.16 Allow the user to configure the user agent to limit > > the number of open viewports. [Priority 2] > > > >We have discussed that the minimal requirement for > >checkpoint 4.16 is to limit the number of open viewports > >to one (refer to "Determining Conformance to UA Guidelines" [2]). > > > >Checkpoint 4.16 is broken for the following reasons: > > > >1) The definition of "viewport" includes frames. Therefore, > > this checkpoint would mean that a user agent could be > > configured to render no more than one frame. > > > >2) If the user has requested only one viewport, > > and the user agent is not required to make all > > content available in a single viewport, then there's a > > risk that the user will not have access to all content. > > > >3) There's no requirement on the user agent to notify the > > user that the user agent has suppressed the opening > > of a viewport. > > > >Recall that the purpose of this checkpoint is to improve > >accessibility for users who might be disoriented by > >the simultaneous presentation of too much content. This > >checkpoint is not about disorientation due to sudden > >focus changes (that's checkpoint 4.15). > > > >In the Proposed Recommendation [3], the checkpoint reads: > > > > 4.16 For those viewports, prompts, and windows that > > open without an explicit request from the user, > > allow the user to configure how they open. > > > >To address the above issues, I propose that we rewrite > >4.16 as follows: > > > ><NEW> > >Allow the user to configure the user agent to only > >open viewports on explicit user request. For a viewport > >that the user agent does not open automatically, > >notify the user and allow the user to open the viewport > >manually. Allow users to close viewports. > ></NEW> > > > >Notes: > > > >1) Some viewports may open and close in groups, like frames. > >2) Following a link constitutes an explicit request, even > > though the user may not know that the author has programmed > > the link to open a new viewport. In this case, the user > > can close the viewport manually. > >3) Executing scripts that cause a window to open do not > > constitute an explicit request from the user. > > > > - Ian > > > >[1] http://www.w3.org/WAI/UA/WD-UAAG10-20000610/ > >[2] http://www.w3.org/WAI/UA/2000/05/ua-minreqs > >[3] http://www.w3.org/TR/2000/PR-UAAG10-20000310 > >-- > >Ian Jacobs (jacobs@w3.org) http://www.w3.org/People/Jacobs > >Tel: +1 831 457-2842 > >Cell: +1 917 450-8783 > > Jon Gunderson, Ph.D., ATP > Coordinator of Assistive Communication and Information Technology > Division of Rehabilitation - Education Services > MC-574 > College of Applied Life Studies > University of Illinois at Urbana/Champaign > 1207 S. Oak Street, Champaign, IL 61820 > > Voice: (217) 244-5870 > Fax: (217) 333-0248 > > E-mail: jongund@uiuc.edu > > WWW: http://www.staff.uiuc.edu/~jongund > WWW: http://www.w3.org/wai/ua -- Ian Jacobs (jacobs@w3.org) http://www.w3.org/People/Jacobs Tel: +1 831 457-2842 Cell: +1 917 450-8783
Received on Monday, 10 July 2000 11:51:20 UTC