- From: Patrick H. Lauke <redux@splintered.co.uk>
- Date: Fri, 18 Dec 2015 14:58:18 +0000
- To: public-mobile-a11y-tf@w3.org
On 18/12/2015 14:51, Richards, Jan wrote: > What if we cued off of another size that could be determined in the content (eg. 3 times the height of capital letters in the default text)? That would only work if there's a matching SC that requires default text to be at a particular legible height. Which, once again, brings us right back to the conundrum of authors not necessarily having direct control over the exact physical size text is rendered on a screen. I think the approach of defining a reasonable size in CSS pixels, coupled with a note that clarifies authors may not be in full control as it depends on the device/OS/UA to a certain extent, is a good one. 44px was suggested as that matches Apple's HCI guidelines, and I know entities like the BBC have used that value too in their guidance for iOS http://www.bbc.co.uk/guidelines/futuremedia/accessibility/mobile/design/touch-target-size - though I see that for Android and "HTML" they've gone for slightly different values. But I'd say 44px gives a reasonable average size on most common devices. If we feel like going bigger, 55px would also work for me...not particularly married to any particular size here. Just that the approach (that we use CSS pixels, and nothing like "put a ruler against the screen" / physical size) must be sound. P -- Patrick H. Lauke www.splintered.co.uk | https://github.com/patrickhlauke http://flickr.com/photos/redux/ | http://redux.deviantart.com twitter: @patrick_h_lauke | skype: patrick_h_lauke
Received on Friday, 18 December 2015 14:58:44 UTC