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touchpad: improve trackpoint palm detection responsiveness

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The touchpad is disabled for 500ms after a trackpoint event to avoid
erroneous palm touches. This is currently refreshed on every trackpoint event
and thus forces a delay of 500ms when switching between the two.

Instead, reduce the timeout to 300ms but ignore any touches started while the
trackpoint was active (i.e. before the last trackpoint event). A touch started
after the last event is released once the timeout expires.

This is the same logic used for disable-while-typing.

https://bugzilla.redhat.com/show_bug.cgi?id=1233844

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-06-23 15:36:05 +10:00
parent 081b6b3dff
commit eb4bd799de
2 changed files with 34 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
src/evdev-mt-touchpad.c
View file

@ -34,7 +34,7 @@
* TP_MAGIC_SLOWDOWN in filter.c */
#define DEFAULT_ACCEL_NUMERATOR 3000.0
#define DEFAULT_HYSTERESIS_MARGIN_DENOMINATOR 700.0
#define DEFAULT_TRACKPOINT_ACTIVITY_TIMEOUT 500 /* ms */
#define DEFAULT_TRACKPOINT_ACTIVITY_TIMEOUT 300 /* ms */
#define DEFAULT_KEYBOARD_ACTIVITY_TIMEOUT_1 200 /* ms */
#define DEFAULT_KEYBOARD_ACTIVITY_TIMEOUT_2 500 /* ms */
#define FAKE_FINGER_OVERFLOW (1 << 7)
@ -515,6 +515,31 @@ tp_palm_detect_dwt(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
return 0;
}
static int
tp_palm_detect_trackpoint(struct tp_dispatch *tp,
struct tp_touch *t,
uint64_t time)
{
if (t->palm.state == PALM_NONE &&
t->state == TOUCH_BEGIN &&
tp->palm.trackpoint_active) {
t->palm.state = PALM_TRACKPOINT;
return 1;
} else if (t->palm.state == PALM_TRACKPOINT &&
t->state == TOUCH_UPDATE &&
!tp->palm.trackpoint_active) {
if (t->palm.time == 0 ||
t->palm.time > tp->palm.trackpoint_last_event_time) {
t->palm.state = PALM_NONE;
log_debug(tp_libinput_context(tp),
"palm: touch released, timeout after trackpoint\n");
}
}
return 0;
}
static void
tp_palm_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
{
@ -526,6 +551,9 @@ tp_palm_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
if (tp_palm_detect_dwt(tp, t, time))
goto out;
if (tp_palm_detect_trackpoint(tp, t, time))
goto out;
/* If labelled a touch as palm, we unlabel as palm when
we move out of the palm edge zone within the timeout, provided
the direction is within 45 degrees of the horizontal.
@ -568,7 +596,8 @@ tp_palm_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
out:
log_debug(tp_libinput_context(tp),
"palm: palm detected (%s)\n",
t->palm.state == PALM_EDGE ? "edge" : "typing");
t->palm.state == PALM_EDGE ? "edge" :
t->palm.state == PALM_TYPING ? "typing" : "trackpoint");
}
static void
@ -948,6 +977,7 @@ tp_trackpoint_event(uint64_t time, struct libinput_event *event, void *data)
tp->palm.trackpoint_active = true;
}
tp->palm.trackpoint_last_event_time = time;
libinput_timer_set(&tp->palm.trackpoint_timer,
time + DEFAULT_TRACKPOINT_ACTIVITY_TIMEOUT);
}

2
src/evdev-mt-touchpad.h
View file

@ -64,6 +64,7 @@ enum touch_palm_state {
PALM_NONE = 0,
PALM_EDGE,
PALM_TYPING,
PALM_TRACKPOINT,
};
enum button_event {
@ -281,6 +282,7 @@ struct tp_dispatch {
bool trackpoint_active;
struct libinput_event_listener trackpoint_listener;
struct libinput_timer trackpoint_timer;
uint64_t trackpoint_last_event_time;
} palm;
struct {