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2bbf4a0117
The previous code used delta/event as scroll trigger which roughly translates to speed, but depends on the sampling rate of the device. For slow two-finger motion, a user may move the height of the touchpad without ever triggering scrolling. Change the _initial_ trigger to a cumulative trigger, i.e. once the user moved past the threshold distance, scrolling starts regardless of the speed. Once scrolling is engaged, the original trigger of threshold/event is required to engange the second scroll direction. Note that except for really slow movements, it's very easy to engage both scroll directions on a touchpad. This is intentional, libinput does not have enough semantic knowledge to know if horizontal scrolling is needed. So we provide some direction locking but not much, it's up to the client/toolkit/widget to decide if both scroll directions should be handled. Add a comment to clarify that in the public doc. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com> |
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| .. | ||
| evdev-mt-touchpad-buttons.c | ||
| evdev-mt-touchpad-tap.c | ||
| evdev-mt-touchpad.c | ||
| evdev-mt-touchpad.h | ||
| evdev.c | ||
| evdev.h | ||
| filter-private.h | ||
| filter.c | ||
| filter.h | ||
| libinput-private.h | ||
| libinput-util.c | ||
| libinput-util.h | ||
| libinput-version.h.in | ||
| libinput.c | ||
| libinput.h | ||
| libinput.pc.in | ||
| Makefile.am | ||
| path.c | ||
| path.h | ||
| timer.c | ||
| timer.h | ||
| udev-seat.c | ||
| udev-seat.h | ||