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Path-based gestures update

From: Alastair Campbell <acampbell@nomensa.com>
Date: Wed, 12 Jun 2019 10:26:42 +0000
To: David MacDonald <david100@sympatico.ca>
CC: WCAG list <w3c-wai-gl@w3.org>
Message-ID: <30E426FE-5CEC-47D1-A31C-7D1E4430586A@nomensa.com>
Hi David & everyone,

I’ve made some updates after the call yesterday, the paragraph you found difficult has been updated to:

Browsers on a touch screen device generally provide some default gestures that impact whether a path-based gesture is needed. For example, a web browser on a touch-screen devices might detect a vertical gesture and scroll the page. If a user places their finger on a slider thumb and moves up (to scroll down) that might not activate the slider (depending on implementation). If the user moves horizontally first then the slider could capture that gesture and ignore vertical movement, resulting in a path-based gesture. If you include touch-screen devices as accessibility supported then these types of interaction need testing with a touch screen as using a mouse in a similar way would not the same browser behaviour.

I’ve also added another diagram to differentiate free-form from path-based gestures, you might need to hard-refresh to see it:

Is that better?

Kind regards,



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Received on Wednesday, 12 June 2019 10:27:08 UTC

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