Re: Action 1500 - fixed zoom

For some apps I agree with you. For others I do not. This is why it 
should be an app-specific decision as to whether this is the right thing 
to do. I see zoom availability as a potential usability issue and not an 
accessibility issue, so long as there is a method to accomplish the text 
resize functionality. So IMO we should let the market decide if this is 
something that users want.

Regards,
James


On 10/8/2014 1:34 PM, Cynthia Shelly wrote:
>
> I'm less convinced on this scenario.  It bugs me when apps on my phone 
> won't zoom, frankly.  I don't want to set large fonts everywhere, but 
> sometimes want to zoom in on a particular part of an app.  I see this 
> as a shortcoming in the native apps, and not something to mimic in the 
> web platform. Zooming is temporary and specific, where system settings 
> are permanent and pervasive.  They are very different user behaviors.  
> IMHO, both should be universally supported.
>
> *From:*James Nurthen [mailto:james.nurthen@oracle.com]
> *Sent:* Wednesday, October 8, 2014 11:15 AM
> *To:* public-pfwg@w3.org
> *Subject:* Re: Action 1500 - fixed zoom
>
> A further type of applications where, in my opinion, it is legitimate 
> to disable zooming are web applications which are attempting to mimic 
> the look and feel of native apps.
> On an iOS (I'm unsure how native apps look on other platforms) device, 
> for example, native applications normally do not respond to zoom. Take 
> a look at the iOS Settings application. We have developers who want 
> their web apps to mimic native apps.
> It is possible in Mobile Safari to use the fonts and the zooming 
> levels specified by the OS by specifying various vendor-specific font 
> styles in the style sheet. I would prefer to focus our attentions on 
> ways to allow the user's font preferences to be used in web 
> applications rather than working against a feature which actually can 
> enhance usability when used in the correct ways in the correct types 
> of applications.
>
> Regards,
> James
>
> On 10/8/2014 10:45 AM, Cynthia Shelly wrote:
>
>     https://www.w3.org/WAI/PF/Group/track/actions/1500
>
>     I was given a couple of use cases where I think this is
>     legitimate. 1) is a game like Cut the Rope, where multi-touch is
>     used for game interaction rather than zooming. 2) is Bing Maps,
>     where the default zooming behavior is disabled and the app has
>     created custom zooming behavior in javascript. I still worry about
>     authors misusing this for 'normal' apps where users would expect
>     zooming. I think WCAG failures/techniques are probably the best
>     path here. I will also look into documenting accessibility
>     concerns for these features in MSDN.
>
>     IE supports the following ways to disable zooming.
>     . <meta name="viewport" content="user-scalable=no">
>     . <meta name="viewport" content="minimum-scale=1, maximum-scale=1">
>     . document.addEventListener("touchmove", function(e)
>     {e.preventDefault()})
>     . html { touch-action: none; }
>     . html { -ms-content-zoom-limit-min: 1;
>     -ms-content-zoom-limit-max: 1; }
>
> -- 
> Regards, James
>
> Oracle <http://www.oracle.com>
> James Nurthen | Principal Engineer, Accessibility
> Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1 415 
> 987 1918 <tel:+1%20415%20987%201918>
> OracleCorporate Architecture
> 500 Oracle Parkway | Redwood City, CA 94065
> Green Oracle <http://www.oracle.com/commitment>Oracle is committed to 
> developing practices and products that help protect the environment
>

-- 
Regards, James

Oracle <http://www.oracle.com>
James Nurthen | Principal Engineer, Accessibility
Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1 415 987 
1918 <tel:+1%20415%20987%201918>
Oracle Corporate Architecture
500 Oracle Parkway | Redwood City, CA 94065
Green Oracle <http://www.oracle.com/commitment> Oracle is committed to 
developing practices and products that help protect the environment