[PATCH wayland-protocols] Add action binder protocol

[Pekka Paalanen]

On Mon, 9 Apr 2018 15:49:37 +1000
Peter Hutterer <peter.hutterer at who-t.net> wrote:

> Hey, look, almost year later and I found this email. In my defence, I was on
> an airplane at the time, hence I missed this :)
> 
> This came up in #wayland where pekka linked to it, so I figured I might as
> well look through it.
> 
> On Wed, Aug 16, 2017 at 09:19:06PM +0200, Quentin Glidic wrote:
> > From: Quentin Glidic <sardemff7+git at sardemff7.net>
> > 
> > Signed-off-by: Quentin Glidic <sardemff7+git at sardemff7.net>
> > ---
> > 
> > As for one-off vs. sustained actions, alternative wording was suggested:
> > - one-shot vs. sustained
> > - instantaneous vs. sustained
> > - immediate vs. driven
> > - triggered vs. initiated
> > 
> >  unstable/action-binder/README                      |   4 +
> >  .../action-binder/action-binder-unstable-v1.xml    | 121 +++++++++++++++++++++
> >  2 files changed, 125 insertions(+)
> >  create mode 100644 unstable/action-binder/README
> >  create mode 100644 unstable/action-binder/action-binder-unstable-v1.xml

> > +    <event name="triggered">
> > +      <description summary="the action triggered">
> > +	This event is sent for one-off actions.
> > +
> > +	If a binding would trigger both triggered and started events, the
> > +	started event must be sent first.
> > +      </description>  
> 
> This almost certainly needs a value, but at that point it gets a bit harder.
> The example in the recent #wayland discussion was the wacom tablet pad
> strip but this can get more convoluted quickly. A strip has one 
> value but 2d manipulations (pinch-and-rotate) can have more axes. So maybe
> something like 
> 
>    <event name="value">
>      <description summary="the value for the subsequent action">
>      This event is sent before started, stopped, or triggered and contains
>      the value for the subsequent started, stopped, or triggered event. More
>      than one value event may be sent, a client must accumulate all values
>      in the order they are sent. The values are namespace/action specific.
>       </description>
>     </event>
> 
> It's not any more generic than the rest of the protocol ;)

Hi,

I'd like to correct my intention when referring to this patch. I
assumed that a tablet extension could replicate and modify parts of the
action binder protocol for whatever tablet actions would make sense. I
didn't expect the action binder protocol would be usable as is for
tablet input which needs to be targeted to a wl_surface I presume. But
if it would work, fine by me, though it does feel a little far-fetched.

Just want to point out, that the action binder protocol has no
wl_surface focus as it is meant for global shortcuts... which does not
seem to be mentioned in any part, spec or commit message.


Thanks,
pq
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