Re: Events when adding and removing animation elements in play

On 8 okt 2010, at 02:45, Brian Birtles wrote:

> Dear all,
>=20
> I wish to clarify the expected behaviour of animations that are
> dynamically removed and added from a document with regards to the
> events that are generated.


Brian,
I think you'll have to ask this in a more SVG-specific forum, at least: =
you'll be more likely to find people there who have an opinion on this =
for SVG, which seems to be your main interest.

For SMIL 2.0 we specifically allowed only very limited modification of =
the DOM tree (only adding begin times, really), because the semantics of =
modifying the live document on the fly are horrendous. At that time, we =
thought that a later incarnation of the SYMM group might tackle this, =
but so far that hasn't happened:-)

I'm personally rather interested in the subject of modifying active =
documents, and we've written a paper on preliminary work for Document =
Engineering this year, with the plan to work things out more thoroughly =
for next year. But so far the results are that allowing any random =
modification to an active document is probably out of the question, =
unless you're willing to recompute the whole timegraph, and even then =
describing the semantics of the changes will probably be (a) very =
difficult and (b) unexpected by end users. But the good news is that if =
you disallow some things (such as removing a node on which other nodes =
depend for their timing) it may be possible to come up with reasonable =
semantics. But, as said: the actual work still has to be done...
--
Jack Jansen, <[email protected]>, http://www.cwi.nl/~jack
If I can't dance I don't want to be part of your revolution -- Emma =
Goldman