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RE: WebEvents-ISSUE-13: What event(s), if any, should fire when non-positional attributes of a touch point change? [Touch Events spec]

From: <Cathy.Chan@nokia.com>
Date: Wed, 13 Apr 2011 16:05:59 +0000
To: <mbrubeck@mozilla.com>, <public-webevents@w3.org>
CC: <sysbot+tracker@w3.org>
Message-ID: <A46437648ECB3D4F852B077AFF9099F5017A32@008-AM1MPN1-017.mgdnok.nokia.com>
Thanks Matt. That addresses the issue.
- Cathy.

-----Original Message-----
From: public-webevents-request@w3.org [mailto:public-webevents-request@w3.org] On Behalf Of ext Matt Brubeck
Sent: Tuesday, April 12, 2011 1:46 PM
To: Web Events Working Group WG
Cc: Web Events Working Group Issue Tracker
Subject: Re: WebEvents-ISSUE-13: What event(s), if any, should fire when non-positional attributes of a touch point change? [Touch Events spec]

I committed this proposal in
http://dvcs.w3.org/hg/webevents/rev/96b646535d4e


On 04/06/2011 12:30 AM, Matt Brubeck wrote:
> On 04/04/2011 12:59 PM, Web Events Working Group Issue Tracker wrote:
>> What events, if any, should fire when other attributes of a touch 
>> point changes? This includes the size and shape of the touch area 
>> (radiusX, radiusY, rotationAngle) and the force being applied.
>
> I suggest that we use the "touchmove" event in these cases, for the 
> following reasons:
>
> 1) It will probably be common for the shape and location of the touch 
> point to change at the same time. I think it will be simpler to use a 
> single event to communicate this, rather than two events.
>
> 2) Changes in size and orientation of the touch point are arguably a 
> form of movement.
>
> 3) I do not forsee any problems caused by "touchmove" events that do 
> not cause changes in the X/Y coordinates of a TouchPoint, especially 
> since this already happens in the case where one touch point moves and 
> another does not.
>
>> This could also potentially include the depression of the modififer
>  > keys (alt/ctrl/meta/shift), even if those attributes are moved to  
> > the TouchEvent interface as is being discussed in ISSUE-12.
>
> I think the user agent should *not* dispatch a "touchmove" event (or 
> other touch event) when the only input is a depressed or released 
> modifier key. Standard keydown/keyup events can be used for this instead.
>


Received on Wednesday, 13 April 2011 16:06:36 GMT

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