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touchpad: put a movement threshold on thumb detection

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If a thumb moves around, it's not resting and we should consider it a normal
touch.

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 2015-07-22 11:53:22 +10:00
parent 2dbf998aa8
commit 2c78149844
3 changed files with 45 additions and 3 deletions
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16
src/evdev-mt-touchpad.c
View file

@ -636,6 +636,22 @@ tp_thumb_detect(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
goto out;
}
/* If the thumb moves by more than 7mm, it's not a resting thumb */
if (t->state == TOUCH_BEGIN)
t->thumb.initial = t->point;
else if (t->state == TOUCH_UPDATE) {
struct device_float_coords delta;
struct normalized_coords normalized;
delta = device_delta(t->point, t->thumb.initial);
normalized = tp_normalize_delta(tp, delta);
if (normalized_length(normalized) >
TP_MM_TO_DPI_NORMALIZED(7)) {
t->thumb.state = THUMB_STATE_NO;
goto out;
}
}
/* Note: a thumb at the edge of the touchpad won't trigger the
* threshold, the surface area is usually too small. So we have a
* two-stage detection: pressure and time within the area.

1
src/evdev-mt-touchpad.h
View file

@ -204,6 +204,7 @@ struct tp_touch {
struct {
enum tp_thumb_state state;
uint64_t first_touch_time;
struct device_coords initial;
} thumb;
};

31
test/touchpad.c
View file

@ -4054,15 +4054,39 @@ START_TEST(touchpad_thumb_update_no_motion)
litest_drain_events(li);
litest_touch_down(dev, 0, 59, 99);
litest_touch_move_extended(dev, 0, 59, 99, axes);
litest_touch_move_to(dev, 0, 60, 99, 80, 99, 10, 0);
litest_touch_up(dev, 0);
litest_assert_empty_queue(li);
}
END_TEST
START_TEST(touchpad_thumb_moving)
{
struct litest_device *dev = litest_current_device();
struct libinput *li = dev->libinput;
struct axis_replacement axes[] = {
{ ABS_MT_PRESSURE, 190 },
{ -1, 0 }
};
litest_disable_tap(dev->libinput_device);
enable_clickfinger(dev);
if (!has_thumb_detect(dev))
return;
litest_drain_events(li);
litest_touch_down(dev, 0, 50, 99);
litest_touch_move_to(dev, 0, 50, 99, 60, 99, 10, 0);
litest_assert_only_typed_events(li, LIBINPUT_EVENT_POINTER_MOTION);
litest_touch_move_extended(dev, 0, 65, 99, axes);
litest_touch_move_to(dev, 0, 65, 99, 80, 99, 10, 0);
litest_touch_up(dev, 0);
litest_assert_empty_queue(li);
litest_assert_only_typed_events(li, LIBINPUT_EVENT_POINTER_MOTION);
}
END_TEST
@ -4520,6 +4544,7 @@ litest_setup_tests(void)
litest_add("touchpad:thumb", touchpad_thumb_begin_no_motion, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:thumb", touchpad_thumb_update_no_motion, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:thumb", touchpad_thumb_moving, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:thumb", touchpad_thumb_clickfinger, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:thumb", touchpad_thumb_btnarea, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:thumb", touchpad_thumb_edgescroll, LITEST_CLICKPAD, LITEST_ANY);