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RE: ISSUE-58 (showBackground animateable): shouBackground should not be animateable [DFXP 1.0]

From: Sean Hayes <Sean.Hayes@microsoft.com>
Date: Tue, 21 Apr 2009 18:04:14 +0100
To: Public TTWG List <public-tt@w3.org>
Message-ID: <AB3FC8E280628440B366A29DABB6B6E8070E50880B@EA-EXMSG-C334.europe.corp.microsoft.com>
I will also create additional animation tests for the additional style attributes as part of the test suite revamp.

Sean

-----Original Message-----
From: public-tt-request@w3.org [mailto:public-tt-request@w3.org] On Behalf Of Glenn A. Adams
Sent: 21 April 2009 2:52 AM
To: Geoff Freed; Public TTWG List
Subject: Re: ISSUE-58 (showBackground animateable): shouBackground should not be animateable [DFXP 1.0]


yes; in fact, we discussed this before on telecon and i mentioned then that
the position of a region could be animated in this fashion; however, on my
recent checks about this, i discovered it was not marked as animatable; so
we need to make it animatable to support this usage; i am proposing to make
all the style properties uniformly animatable; since i haven't heard any
objection yet, i will go ahead and implement this in the editor's draft;

g.


On 4/21/09 1:31 AM, "Geoff Freed" <geoff_freed@wgbh.org> wrote:

>
> i have no problem with this proposal, but i do have a question.  by allowing
> animation on properties like tts:extent and tts:origin, would that allow the
> author to actually move a single caption-display region from, say, the lower
> third to the upper third, thereby avoiding the pre-definition of fixed regions
> as we've discussed before?
>
> thanks.
> g.
>
>
> ________________________________________
> From: public-tt-request@w3.org [public-tt-request@w3.org] On Behalf Of Glenn
> A. Adams [gadams@xfsi.com]
> Sent: Sunday, April 19, 2009 2:10 AM
> To: Public TTWG List
> Subject: Re: ISSUE-58 (showBackground animateable): shouBackground should not
> be animateable [DFXP 1.0]
>
> i propose we take a different approach: make all styles animatable
>
> i note that at present, the following are defined as being non-animatable:
>
> tts:direction
> tts:displayAlign
> tts:dynamicFlow
> tts:extent
> tts:origin
> tts:overflow
> tts:unicodeBidi
> tts:writingMode
>
> in contrast, all of the (remaining) following properties are defined as
> animatable:
>
> tts:backgroundColor
> tts:color
> tts:display
> tts:fontFamily
> tts:fontSize
> tts:fontStyle
> tts:fontWeight
> tts:lineHeight
> tts:opacity
> tts:padding
> tts:showBackground
> tts:textAlign
> tts:textDecoration
> tts:textOutline
> tts:visibility
> tts:wrapOption
> tts:zIndex
>
> there doesn't seem to be any principled reason for making any of the above
> properties non-animatable; in fact, we have recently assumed that tts:origin
> (and perhaps tts:extent) is animatable in order to move a region to a new
> location; also, the following seem to be inconsistent on the surface:
>
> * tts:textAlign is animatable, but tts:displayAlign is not
> * tts:wrapOption is animatable, but tts:overflow is not
>
> if one supports animation for one property, then it should be fairly trivial
> to support animation on any other property;
>
> therefore, i propose we make all the style properties animatable, which will
> make usage and authoring less subject to special case exceptions;
>
> glenn
>
> On 4/18/09 3:03 AM, "Timed Text Working Group Issue Tracker"
> <sysbot+tracker@w3.org> wrote:
>
>>
>> ISSUE-58 (showBackground animateable): shouBackground should not be
>> animateable [DFXP 1.0]
>>
>> http://www.w3.org/AudioVideo/TT/tracker/issues/58
>>
>> Raised by: Sean Hayes
>> On product: DFXP 1.0
>>
>> tts:showBackground is listed in the specification as animateable. I cant see
>> why this is necessary. Unless we have a use case for this I propose it be set
>> to animateable: none
>>
>>
>>
>
>
Received on Tuesday, 21 April 2009 17:04:58 GMT

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