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Re: Request for Comments: Pointer Events spec's touch-action CSS property

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Fri, 18 Jan 2013 16:51:08 -0800
Message-ID: <CAAWBYDC9NupCymYnzNimfXnMsoD1GtvthqDwMA7yD2-RwE0M4g@mail.gmail.com>
To: Jacob Rossi <Jacob.Rossi@microsoft.com>
Cc: "L. David Baron" <dbaron@dbaron.org>, "public-pointer-events@w3.org" <public-pointer-events@w3.org>, "www-style@w3.org" <www-style@w3.org>
On Fri, Jan 18, 2013 at 4:23 PM, Jacob Rossi <Jacob.Rossi@microsoft.com> wrote:
> I think this misses the nuance of the nearest ancestor having both a touch behavior and touch-action: none, in which case you do not execute the action.  How about:
>
> When a user touches an element, the effect of that touch is determined by the 'touch-action' property and the default touch behaviors on the element and its ancestors.  To determine the effect of a touch, find the nearest ancestor (starting from the element itself) that either has a default touch behavior or that has "touch-action: none".  If that element has “touch-action: none”, do nothing.  Otherwise, allow the element to start considering the touch for the purposes of executing its default touch behavior.
>
> When a UA determines a touch should trigger a behavior on this element (by methods outside the scope of this spec), then it must cancel that pointer by dispatching pointercancel and pointerout events.

Sounds good!

~TJ
Received on Saturday, 19 January 2013 00:51:56 GMT

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