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Thread: Multipoint and Path-based gestures - Websites in desktop
Number of posts in this thread: 5 (In chronological order)
From: Vaibhav Saraf
Date: Sun, Sep 13 2020 11:12PM
Subject: Multipoint and Path-based gestures - Websites in desktop
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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
From: Mallory
Date: Mon, Sep 14 2020 4:36AM
Subject: Re: Multipoint and Path-based gestures - Websites in desktop
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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
> > > > >
From: Patrick H. Lauke
Date: Mon, Sep 14 2020 4:45AM
Subject: Re: Multipoint and Path-based gestures - Websites in desktop
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On 14/09/2020 06:12, 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.
I'll interject briefly that desktop/laptop can also have touch
interfaces - see for instance Microsoft Surface. So distinguishing
between "mobile/tablet" and "desktop/laptop" becomes less meaningful as
time goes on.
> 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.
Path-based: the pointer must follow a specific path. Think for instance
a slider that is badly coded and requires the user to keep the mouse
steady along the track...if they move too far out of the track, the
slider fails/snaps back to the previous value. I've seen naive slider
implementations that fail this way.
> 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.
Mouse wheel is not multi-point, nor is it path-based.
P
--
Patrick H. Lauke
https://www.splintered.co.uk/ | https://github.com/patrickhlauke
https://flickr.com/photos/redux/ | https://www.deviantart.com/redux
twitter: @patrick_h_lauke | skype: patrick_h_lauke
From: Mallory
Date: Mon, Sep 14 2020 4:53AM
Subject: Re: Multipoint and Path-based gestures - Websites in desktop
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I have a MS laptop with a touchscreen, but I couldn't come up with anything I've run into while surfing webby things yet.
On Mon, Sep 14, 2020, at 12:45 PM, Patrick H. Lauke wrote:
> On 14/09/2020 06:12, 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.
>
> I'll interject briefly that desktop/laptop can also have touch
> interfaces - see for instance Microsoft Surface. So distinguishing
> between "mobile/tablet" and "desktop/laptop" becomes less meaningful as
> time goes on.
> ...
> --
> Patrick H. Lauke
>
> https://www.splintered.co.uk/ | https://github.com/patrickhlauke
> https://flickr.com/photos/redux/ | https://www.deviantart.com/redux
> twitter: @patrick_h_lauke | skype: patrick_h_lauke
> > > > >
From: Patrick H. Lauke
Date: Mon, Sep 14 2020 5:07AM
Subject: Re: Multipoint and Path-based gestures - Websites in desktop
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On 14/09/2020 11:53, Mallory wrote:
> I have a MS laptop with a touchscreen, but I couldn't come up with anything I've run into while surfing webby things yet.
Can sometimes happen more by accident, e.g.
https://www.youtube.com/watch?v=f_2GKsI9TQU (fixed since then)
But yes, just want to make sure that it's not misunderstood that "oh,
this is desktop, so multipoint can't apply"
P
--
Patrick H. Lauke
https://www.splintered.co.uk/ | https://github.com/patrickhlauke
https://flickr.com/photos/redux/ | https://www.deviantart.com/redux
twitter: @patrick_h_lauke | skype: patrick_h_lauke