Re: minimum target size for mouse

maybe I missed it 

but I don’t understand how an author has any idea what physical size a button is on a screen without knowing the size of the screen and the current pixel density setting at that moment.

pixels are of no real value.   if we say this is required — it MUST be important that it be true for the user.   But if 44 px is different on each device and the persons pointing is not….. then….   ????

are we just assuming that px is some physical size and that a user with a physical problem won’t use a screen where 44 px is too small?   (this is a potentially valid approach by the way) 

Just trying to understand how the group resolved this. 

gregg

> On Apr 21, 2016, at 9:17 AM, David MacDonald <david100@sympatico.ca> wrote:
> 
> The feeling of the the mobile task force is that our touch size SC should include a minimum size for a pointer/mouse target in addition to touch. We're not sure what that minimum should be, whether it should be the same 44px as the touch or smaller. It was the end of the call so were were not able to flesh this out sufficiently... Os I'm creating a discussion here. If there is momentum I'll set up a WIKI page. There is some discussion about how would the author know the what is activating the control on responsive sites that share icons for touch AND pointer. The current wording is. 
> 
> 2.5.4 Target Size: A touch target <https://w3c.github.io/Mobile-A11y-Extension/#def-touch-target> is at least 44px by 44px of the visible display at the default viewport size. (Level AA)
> 
> What about this amendment, If it's an ok construct, then what value should be for the pointer minimum size.
> 2.5.4 Target Size: A touch target <https://w3c.github.io/Mobile-A11y-Extension/#def-touch-target> is at least 44px by 44px and the pointer/mouse target is at least <x pixels> by <y pixels> of the visible display at the default viewport size. (Level AA)
>