Slots for animations

[AzaToth]

This patch adds slots to the fx mechanism and results in that all animations in a given slot will use the same time quanta.

[AzaToth]

updated patch to clean up the interface

[AzaToth]

A more detailed reason for this:

When multiple animations are meant to be executed in "parallel", currently they will be asynchronous and thus experience an delayed animation for later elements. To overcome this issue, we add an slot mechanism which specifies that we can use one single slot for a bunch of animations, and they all will use the same start time and current time.

[AzaToth]

Here is a visual test; the "normal" is what current behavior is, and slotted is when the effect uses the same slot:

​http://js.azatoth.net/test/slotted.html

[AzaToth]

updated patch to remove the requirement to call reset on chained animations

[AzaToth]

See ​http://js.azatoth.net/test/slotted2.html for example using second patch.

[snover]

Resetting milestone to future.

[dmethvin]

#7490 is a duplicate of this ticket.

[grevian+jquery@…]

Would it be possible to have a callback added for when all elements in a particular slot have finished execution? Also I find the terminology of "slot" to be a little odd, wouldn't "set" or "group", possibly prefixed like "fxgroup" or "AnimationSet" be more appropriate?

[gnarf]

Another approach to synchronizing animations - ​http://bugs.jquery.com/ticket/7917 - I opened it having not found this ticket while searching.

[AzaToth]

Added pull request at ​https://github.com/jquery/jquery/pull/271

[john]

This was fixed with the resolution of #7917.