Re: [Denemo-devel] Speed of Cursor Animation (was Re: Palettes)

[Richard Shann]

On Mon, 2013-10-14 at 17:00 -0400, Bric wrote:
> On 10/14/2013 02:29 PM, Richard Shann wrote:
> > On Mon, 2013-10-14 at 18:13 +0100, Richard Shann wrote:
> >> It
> >> simply shouldn't be possible for the cursor animation to slow things
> >> up,
> >> as you describe since the re-draw requests are queued so that if the
> >> machine is so busy that by the time the draw happens it is too late
> >> then
> >> all that will result is that the steps of the animation will be
> >> skipped
> >> (because it looks at the time and decides which step it should draw).
> >> (It doesn't know that there are steps, just knows what it should draw
> >> at
> >> a given number of milliseconds after the start, too late and it should
> >> just draw the final result).
> > I wrote the above from memory, but I have just been checking the code
> > and find it is quite untrue :(
> > In fact most of these transitions are 10 steps taken at 20 ms intervals
> > and the steps will be delayed by other things going on.
> > Which only leaves the question - what else do you have going on? The top
> > command might help...
> 
> off the top of my head (before doing any re-checking):  I'm using JACK, 
> religiously.

If that (--enable-jack) is so I think you will find that the slider to
slow down the audio output is unavailable (on far right of playback
controls).

> 
> But that should NOT be the factor here.  I already confirmed that 
> turning off cursor highlighting stops the slowness for me.  I love the 
> instant skip to whatever measure.

yes, that should not affect the drawing - if my reading of the code is
right then the number of transition steps and the time of between steps
needs to be settable by the user to adapt to faster/slower machines. As
I say, you don't need to wait for the cursor to settle before typing in
more music... the instant skip has already happened.

> 
> I don't think I have 3d acceleration or anything like that either.

I don't know what people mean by that.

Richard