[PATCH xf86-input-libinput 1/3] Add a comment regarding scroll dist default values

[Peter Hutterer]

Changed this during development because I forgot that the value actually
matters (for touchpads anyway).

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 src/xf86libinput.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/xf86libinput.c b/src/xf86libinput.c
index 747e84b..324bfc8 100644
--- a/src/xf86libinput.c
+++ b/src/xf86libinput.c
@@ -2928,13 +2928,19 @@ xf86libinput_pre_init(InputDriverPtr drv,
 
 	pInfo->private = driver_data;
 	driver_data->pInfo = pInfo;
-	driver_data->scroll.vdist = 15;
-	driver_data->scroll.hdist = 15;
 	driver_data->path = path;
 	driver_data->shared_device = shared_device;
 	xorg_list_append(&driver_data->shared_device_link,
 			 &shared_device->device_list);
 
+	/* Scroll dist value matters for source finger/continuous. For those
+	 * devices libinput provides pixel-like data, changing this will
+	 * affect touchpad scroll speed. For wheels it doesn't matter as
+	 * we're using the discrete value only.
+	 */
+	driver_data->scroll.vdist = 15;
+	driver_data->scroll.hdist = 15;
+
 	if (!is_subdevice) {
 		if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER))
 			driver_data->capabilities |= CAP_POINTER;
-- 
2.9.3