Kinetic scroll in libinput Xorg driver

[Carsten Haitzler (The Rasterman)]

On Wed, 26 Oct 2016 14:14:13 +0200 Christian Stroetmann
<stroetmann at ontolab.com> said:

> On 26.10.2016 08:57, Alexis BRENON @Wayland wrote:
> 
> @Raster: Thank you for your reminder.
> 
> Maybe Enlightenment with Tiling2 and kinetic scrolling is already what 
> you need.

yes. and then load the tiling module (and enable tiling for the desktops you
want it on etc. - in tiling settings).

> If I remember correctly I3 (www.i3wm.org)<http://i3wm.org/> might work 
> together with Wayland as well.

possibly might work too.

> In general, I have seen at all major toolkits transistion efforts to 
> Wayland since around 2 years. Some have matured while others are 
> experimental so to say.

indeed.

> Best Regards
> Christian Stroetmann
> 
> > Just to be sure that I understand clearly, what you call 'Toolkit' is 
> > libraries like GTK, Qt, and co. that are used by developers to build 
> > their apps, isn't it ?
> >
> > Finally, do you know some tiling DE/WM Wayland compliant ?
> >
> > Kind,
> > Alexis.
> >
> > Le mer. 26 oct. 2016 à 02:17, Carsten Haitzler <raster at rasterman.com 
> > <mailto:raster at rasterman.com>> a écrit :
> >
> >     On Mon, 24 Oct 2016 18:42:31 +0000 "Alexis BRENON @Wayland"
> >     <brenon.alexis
> >     +wayland at gmail.com <mailto:wayland at gmail.com>> said:
> >
> >     > Hello everyone,
> >     >
> >     > I would like to implement kinetic scroll in the libinput driver
> >     for Xorg.
> >     >
> >     > I know that it's probably not the intended use of libinput ; as
> >     explained
> >     > in the documentation, it's the client that have to manage that.
> >     >
> >     > However, as an Xorg user not happy with the synaptics driver, I
> >     would like
> >     > to add a similar feature (fixing small disagreements encountered
> >     with
> >     > synaptics) to libinput, allowing Xorg users to easily move to
> >     libinput
> >     > without losing this feature.
> >     >
> >     > My first idea is to implement the kinetic scroll using a thread
> >     that sends
> >     > axis events as long as there is no button event, key event or
> >     motion event
> >     > higher than a threshold.
> >     >
> >     > It makes some time since the last time I developed in C, and
> >     maybe it's not
> >     > the better way to do it. I would be happy to hear your advices.
> >     >
> >     > One thing I'm thinking of is then to add some options in the Xorg
> >     > configuration file to enable/disable this feature, choose the events
> >     > stopping the kinetic scroll and change some thresholds. This
> >     will allow to
> >     > easily disable this feature in the future in case the clients
> >     manage the
> >     > kinetic scroll on their own.
> >     >
> >     > What do you think of this? Is there someone already working on
> >     it? Is my
> >     > proposition a good way to implement it?
> >     >
> >     > Thanks for your attention.
> >     >
> >     > Kind regards,
> >     > Alexis BRENON.
> >
> >     we already do kinetic scrolling higher up in the toolkit. we do
> >     acceleration
> >     using these events and we do smooth animated scrolling in our
> >     scroller and not
> >     just stepping, as well as momentum as we slid with bouncing at the
> >     ends. it's
> >     already done in toolkit out of the box. if you try and hack this
> >     in at the
> >     input layer this simply doubles the amount of this and likely
> >     makes the user
> >     experience worse. this would have to be off by default and if it's
> >     off by
> >     default... you need ways of turning it on client by client ... and
> >     even then
> >     there are a pile of other problems you'll hit. so my suggestion is
> >     - don't. add
> >     to your favorite toolkits instead if they don't have it. they have
> >     far more
> >     information about the context at the time and the use cases needed
> >     etc.
> >
> >
> >
> >     --
> >     ------------- Codito, ergo sum - "I code, therefore I am"
> >     --------------
> >     The Rasterman (Carsten Haitzler) raster at rasterman.com
> >     <mailto:raster at rasterman.com>
> >
> >
> >
> > _______________________________________________
> > wayland-devel mailing list
> > wayland-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/wayland-devel
> 


-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    raster at rasterman.com