- From: Simon Harper <simon.harper@manchester.ac.uk>
- Date: Wed, 19 Aug 2009 16:46:01 +0100
- To: UAWG list <w3c-wai-ua@w3.org>
I was monitoring xtech and saw this going through http://dev.w3.org/html5/canvas-api/canvas-2d-api.html which says.. 5. Accessibility Considerations Authors should not use the canvas interface element in a document when a more suitable element is available. For example, it is inappropriate to use a canvas interface element to render a page heading: if the desired presentation of the heading is graphically intense, it should be marked up using appropriate elements (typically h1) and then styled using CSS and supporting technologies such as XBL. When authors use the canvas interface element, they must also provide content that, when presented to the user, conveys essentially the same function or purpose as the bitmap canvas. This content may be placed as content of the canvas interface element. The contents of the canvas interface element, if any, are the element's fallback content. In interactive visual media, if scripting is enabled for the canvas interface element, the canvas interface element represents an embedded element with a dynamically created image. In non-interactive, static, visual media, if the canvas interface element has been previously painted on (e.g. if the page was viewed in an interactive visual medium and is now being printed, or if some script that ran during the page layout process painted on the element), then the canvas interface element represents embedded content with the current image and size. Otherwise, the element represents its fallback content instead. In non-visual media, and in visual media if scripting is disabled for the canvas interface element, the canvas interface element represents its fallback content instead. they say... Techniques and additional APIs to make specific uses of canvas interface elements more widely accessible are under discussion, and will be reflected in this draft as progress is made. I wonder what these are? Cheers Si. ======================= Simon Harper University of Manchester (UK) Human Centred Web Lab: http://hcw.cs.manchester.ac.uk My Site: http://hcw.cs.manchester.ac.uk/people/harper/ My Diary (Web): http://hcw.cs.manchester.ac.uk/people/harper/ phpicalendar/week.php My Diary (Subscribe): http://hcw.cs.manchester.ac.uk/diaries/harper/ SimonHarper.ics
Received on Wednesday, 19 August 2009 15:46:39 UTC