608207 - requestAnimationFrame for mousemove related animations

Status: UNCONFIRMED

(Core :: Layout, enhancement)

Description

[Giorgio]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b8pre) Gecko/20101028 Firefox/4.0b8pre
Build Identifier: 

hi, is possible to extend the functionality of requestAnimationFrame to the mousemove related animations?

maybe it is possible to do it now, but i'm doing it wrong, because i can't see good performances

thank you

Reproducible: Always

Comment 1

[Boris Zbarsky [:bzbarsky]]

I'm not sure what you're asking for here.  requestAnimationFrame can be called from anywhere you want, including mousemove handlers.  What's the problem you're having?

Comment 2

[Giorgio]

hi boris, how are you?

for to have benefit of mozrequestanimationframe i should put the animation code in mozbeforepaint event?

now i have

addEventListener("mousemove", function mmHandler(ev){

// anim here

window.mozRequestAnimationFrame();

},true);

Comment 3

[Boris Zbarsky [:bzbarsky]]

The point of mozRequestAnimationFrame is to ask to be notified before the browser is about to paint.   So if your code is structured as in comment 2, then yes the call is pointless.  You'd want to put your "anim here" code in the mozbeforepaint event handler.

Comment 4

[Giorgio]

so... something like this can be good?

addEventListener("mousemove", function(mmevent)
{
      

     addEventListener("mozbeforepaint", function(ev){

           // animation here

          removeEventListener("mozbeforepaint",arguments.callee,true);
     },true);

     window.mozRequestAnimationFrame();

},true);

Comment 5

[Boris Zbarsky [:bzbarsky]]

Yes, depending on what "animation here" does.

Or you could just skip the mozbeforepaint event and pass your function directly to mozRequestAnimationFrame, if you just want it to run once.

Comment 6

[Giorgio]

the animation positions a box according to mouse coordinates (mmevent)

i'm testing it, thank you for now