[PATCH libinput 19/26] tablet: support z-rotation for the mouse/lens tool

[Peter Hutterer]

On Mon, Mar 02, 2015 at 10:38:54AM -0500, Benjamin Tissoires wrote:
> On Mon, Mar 2, 2015 at 1:53 AM, Peter Hutterer <peter.hutterer at who-t.net> wrote:
> > On Thu, Feb 26, 2015 at 04:20:49PM -0500, Benjamin Tissoires wrote:
> >> On Tue, Feb 24, 2015 at 1:21 AM, Peter Hutterer
> >> <peter.hutterer at who-t.net> wrote:
> >> > Needs to be calculated from the x/y tilt values, the mouse has a fixed offset
> >> > of 175 degrees counterclockwise.
> >> >
> >> > Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
> >> > ---
> [snipped]
> >> >
> >> >         memset(tablet->changed_axes, 0, sizeof(tablet->changed_axes));
> >> > @@ -454,6 +511,9 @@ tool_set_bits_from_libwacom(const struct tablet_dispatch *tablet,
> >> >                 copy_axis_cap(tablet, tool, LIBINPUT_TABLET_AXIS_TILT_X);
> >> >                 copy_axis_cap(tablet, tool, LIBINPUT_TABLET_AXIS_TILT_Y);
> >> >                 break;
> >> > +       case WSTYLUS_PUCK:
> >> > +               copy_axis_cap(tablet, tool, LIBINPUT_TABLET_AXIS_ROTATION_Z);
> >> > +               break;
> >>
> >> Further tests showed that the puck needs to export the Distance as
> >> well. Otherwise, it becomes impossible to have a sane relative mouse
> >> mode without asking the user to raise the mouse out of proximity.
> >
> > I'll add the distance to the axes exported in libwacom. Not sure what you
> > mean with the relative mouse mode though, can you explain further?
> >
> 
> Sure.
> So, when you are using a mouse on a Wacom, you are most of the time
> using it in relative mode.
> When you move the cursor to the left in several steps, you have to
> release the mouse go back to the right and put the mouse back on the
> sensor. During the time the mouse is not touching the sensor, you need
> to stop sending relative events (or the cursor goes back and forth).
> If you do not have the Distance information, the user has to be out of
> proximity of the sensor to be able to not send events while the mouse
> is in-air. This distance can be several centimeters on recent Wacoms,
> and is a pain for the user.
> With the Distance information, you know that the mouse is not touching
> anymore the sensor, and the driver can stop sending relative events as
> soon as the mouse is lifted.

sorry, didn't set the In-reply-to header for the patch, it is here:
http://lists.freedesktop.org/archives/wayland-devel/2015-March/020413.html

Cheers,
   Peter