Re: minimum target size for mouse

Hi Patrick

Would you like to chime in on this?

We originally had a physical measurement .... but have moved to Pixels
based on a well articulated discussion from Patrick...

On Thu, Apr 21, 2016 at 12:57 PM, Gregg Vanderheiden <
gregg@raisingthefloor.org> wrote:

> 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)
>
>
>