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Re: Multipoint and Path-based gestures - Websites in desktop

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From: Mallory
Date: Sep 14, 2020 4:36AM

Hi,
Any kind of pinch-and-zoom where you need at least 2 fingers would fall under the multipath SC. If there's just a + and - set of buttons I can tap with one finger to zoom in/out, then that SC would be passed.
Apple Maps doesn't (or didn't? I don't know, I don't have Apple anything) offer the buttons.
I thought this was a nice blog post about these sorts of issues: http://simpleprimate.com/blog/motor

Some mobile phones have a thing instead of a PIN or password to unlock them, where a grid (or number grid) is displayed and a user has to touch one section, then draw with their finger a specific path between the other numbers/squares, and let up at a particular place. IF a website were to require a movement like that, that would be a path-based gesture.
The SC was meant as a mobile-oriented criterion, so while I don't think it's commonly seen on websites, the idea was that mobile sites/applications may introduce such things.

Drag-n-drop, flyout menus:
Unfortunately neither multi-level flyout menus nor drag and drop count as path-based gestures: while multi-level flyouts require users to have enough precision to move a pointer on a particular path, there's no clicking-- no down, then up click. So it's not considered a path at all. Drag and drop isn't considered path-based since while it does have down and up clicks, you can in theory move the pointer anywhere between the pickup and drop areas.

cheers,
_mallory

On Mon, Sep 14, 2020, at 7:12 AM, Vaibhav Saraf wrote:
> Hi Everyone,
>
> Going through WCAG 2.1 SC 2.5.1 which talks about providing single point
> alternatives for multipoint and path-based gestures leaves with some doubts.
>
> The sc talks about mouse pointer as well among all other techniques making
> it look applicable on web pages in desktop/laptop as well. However, I
> cannot relate it to an example which I can encounter on any website.
>
> I was going through one of the interpretations of the success criteria,
> there in the example the author indicated swipe up as a path-based gesture.
>
> https://www.ibm.com/able/guidelines/ci162/pointer_gestures_71.html
>
> Some websites like Google Maps web view exercise zoom in/out based on mouse
> wheel motion forward or backward. Can this be regarded as a path-based
> gesture as well.
>
> Need your inputs in understanding the topic.
>
> Thanks,
> Vaibhav
> > > > >