diff options
| author | Daniel van Vugt <daniel.van.vugt@canonical.com> | 2018-03-01 17:03:28 +0800 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2018-03-05 10:40:48 +1000 |
| commit | 6936a15558f7baa047bdb7e31604ef29be1ae552 (patch) | |
| tree | a7540576ed9633ef5e0bf55d125af145494128b4 /src/evdev-fallback.c | |
| parent | 440d94be57ffa7c826967e0a623700e7c7e759b7 (diff) | |
Introduce omnidirectional (elliptical) hysteresis
This changes the hysteresis region to an ellipse (usually a circle), where
previously it was a rectangle (usually square).
Using an ellipse means the algorithm is no longer more sensitive in some
directions than others. It is now omnidirectional, which solves a few
problems:
* Moving a finger in small circles now creates circles, not squares.
* Moving a finger in a curve no longer snaps the cursor to vertical
or horizontal lines. The cursor now follows a similar curve to the
finger.
https://bugs.freedesktop.org/page.cgi?id=splinter.html&bug=105306
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Diffstat (limited to 'src/evdev-fallback.c')
| -rw-r--r-- | src/evdev-fallback.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src/evdev-fallback.c b/src/evdev-fallback.c index 03f10a85..d1ca81f0 100644 --- a/src/evdev-fallback.c +++ b/src/evdev-fallback.c @@ -127,12 +127,9 @@ fallback_filter_defuzz_touch(struct fallback_dispatch *dispatch, if (!dispatch->mt.want_hysteresis) return false; - point.x = evdev_hysteresis(slot->point.x, - slot->hysteresis_center.x, - dispatch->mt.hysteresis_margin.x); - point.y = evdev_hysteresis(slot->point.y, - slot->hysteresis_center.y, - dispatch->mt.hysteresis_margin.y); + point = evdev_hysteresis(&slot->point, + &slot->hysteresis_center, + &dispatch->mt.hysteresis_margin); slot->hysteresis_center = slot->point; if (point.x == slot->point.x && point.y == slot->point.y) |