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Re: Request for Comments: Proposal for Touch-Based Animation Scrubbing

From: Florian Rivoal <florian@rivoal.net>
Date: Thu, 29 Nov 2012 10:12:14 +0100
To: www-style@w3.org
Message-ID: <op.woi2iorcf5de51@localhost.localdomain>
On Thu, 29 Nov 2012 02:36:33 +0100, Tab Atkins Jr. <jackalmage@gmail.com>  
wrote:

> Thoughts?  Does anyone I haven't spoken to about this think it's
> crazy?  Would you like to see working examples (done with a JS shim,
> of course) of the functionality?  We haven't done any impl work yet,
> but implementing this or something that solves the same problem is a
> priority for the Chrome team in the next few months, so feedback
> sooner rather than later would be great.

There's one thing that I think would be useful, that seems to be missing.

Say you're pulling a tray to open it. You might want to have a threshold  
point, say around 50%. When you releasse before the threshold, the tray  
falls back to 0, but if you release after it, it goes to the end. Notches  
aren't quite the same, as you need to get close by before they snap. You  
might be able to do it with accelerating momentum curves, but it sounds  
like a very roundabout way to go after it.

Maybe a way to go after it would a property that let's you say something  
like:
"if you release between 0% and 50%, switch to the (time based) animation  
called xxxx". That said, I don't know how this would interract with  
momentum, and how to handle the fact that someone may try to scrub again  
while the time-based animation started by the release has kicked in.

Maybe another way would be to address the usecase more directly than with  
ranges mapping to other named animations, and instead define gravity  
centers, with affected ranges. when you're scrubbing, ignore them, when  
you release, if you're in an affected range, fall towards the center.

  - Florian
Received on Thursday, 29 November 2012 09:09:15 GMT

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