libinput/doc/touchpad-tap-state-machine.svg
Peter Hutterer abdca33387 touchpad: introduce MULTITAP for multi-tap-and-drag
Once we have a doubletap, enter a loop in the state machine where we can tap
multiple times and either get a multi-click or a multi-click drag-and-drop.

The sequence down/up down/up down/up produces a triple-click. The sequence
down/up down/up down/up down produces a triple-click with a button down for
dragging. Yes, that glorious octuple-tap-and-drag, it is now possible. World
domination has been achieved, thank you for playing.

We don't know when we finish tapping now, so add a timeout to send the last
click event once the finger has been released for the last time. This
guarantees that the timestamp of the last button down is later than the
last release. This avoids the bug fixed in synaptics commit
xf86-input-synaptics-1.8.0-21-g37d34f0 (some application don't handle
doubletap correctly without the timestamps).

This works for double-tap immediately, for multi-tap we need to remember the
timestamp of the first press event and use it for the release event so that
there's a forced gap between the release and the second press.

https://bugs.freedesktop.org/show_bug.cgi?id=89511

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2015-04-17 12:59:22 +10:00

1094 lines
113 KiB
XML