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Avoid erroneous finger movement after a physical click (#1230441)

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This commit is contained in:
Peter Hutterer 2015-06-16 13:36:06 +10:00
parent be67c6dad6
commit 9d9abc12d4
3 changed files with 232 additions and 1 deletions
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32
0001-touchpad-fix-pinned-finger-drifting.patch Normal file
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@ -0,0 +1,32 @@
From b48ecd186d8fb707e89bf04036a48600dc49125f Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Fri, 12 Jun 2015 17:24:33 +1000
Subject: [PATCH libinput] touchpad: fix pinned finger drifting
This caused the finger to be unpinned on the first motion event after the
click, effectively disabling this feature.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
src/evdev-mt-touchpad.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index c82d733..ce79530 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -440,8 +440,8 @@ tp_unpin_finger(struct tp_dispatch *tp, struct tp_touch *t)
}
/* The finger may slowly drift, adjust the center */
- t->pinned.center.x = t->point.x + t->pinned.center.x / 2;
- t->pinned.center.y = t->point.y + t->pinned.center.y / 2;
+ t->pinned.center.x = (t->point.x + t->pinned.center.x)/2;
+ t->pinned.center.y = (t->point.y + t->pinned.center.y)/2;
}
static void
--
2.4.3

194
0001-touchpad-set-the-finger-pin-distance-to-5mm-where-po.patch Normal file
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@ -0,0 +1,194 @@
From 8025b374d564f4a30b089e5cf6fd65e0c6af8da2 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Fri, 12 Jun 2015 17:29:41 +1000
Subject: [PATCH libinput] touchpad: set the finger pin distance to 5mm where
possible
On touchpads with resolutions, use a 5mm motion threshold before we unpin the
finger (allow motion events while a clickpad button is down). This should
remove any erroneous finger movements while clicking, at the cost of having to
move the finger a bit more for a single-finger click-and-drag (use two fingers
already!)
And drop the finger drifting, it was per-event based rather than time-based.
So unless the motion threshold was hit in a single event it was possible to
move the finger around the whole touchpad without ever unpinning it.
Drop the finger drifting altogether, if the touchpad drifts by more than 5mm
we have other issues.
https://bugzilla.redhat.com/show_bug.cgi?id=1230462
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
src/evdev-mt-touchpad-buttons.c | 19 ++++++++++------
src/evdev-mt-touchpad.c | 10 ++++-----
src/evdev-mt-touchpad.h | 5 ++++-
src/libinput-util.h | 6 ++++++
test/touchpad.c | 48 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 75 insertions(+), 13 deletions(-)
diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index 5786ea8..eb0ddcb 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -31,7 +31,6 @@
#include "evdev-mt-touchpad.h"
-#define DEFAULT_BUTTON_MOTION_THRESHOLD 0.02 /* 2% of size */
#define DEFAULT_BUTTON_ENTER_TIMEOUT 100 /* ms */
#define DEFAULT_BUTTON_LEAVE_TIMEOUT 300 /* ms */
@@ -709,11 +708,19 @@ tp_init_buttons(struct tp_dispatch *tp,
absinfo_x = device->abs.absinfo_x;
absinfo_y = device->abs.absinfo_y;
- width = abs(absinfo_x->maximum - absinfo_x->minimum);
- height = abs(absinfo_y->maximum - absinfo_y->minimum);
- diagonal = sqrt(width*width + height*height);
-
- tp->buttons.motion_dist = diagonal * DEFAULT_BUTTON_MOTION_THRESHOLD;
+ /* pinned-finger motion threshold, see tp_unpin_finger.
+ The MAGIC for resolution-less touchpads ends up as 2% of the diagonal */
+ if (device->abs.fake_resolution) {
+ const int BUTTON_MOTION_MAGIC = 0.007;
+ width = abs(absinfo_x->maximum - absinfo_x->minimum);
+ height = abs(absinfo_y->maximum - absinfo_y->minimum);
+ diagonal = sqrt(width*width + height*height);
+ tp->buttons.motion_dist.x_scale_coeff = diagonal * BUTTON_MOTION_MAGIC;
+ tp->buttons.motion_dist.y_scale_coeff = diagonal * BUTTON_MOTION_MAGIC;
+ } else {
+ tp->buttons.motion_dist.x_scale_coeff = 1.0/absinfo_x->resolution;
+ tp->buttons.motion_dist.y_scale_coeff = 1.0/absinfo_y->resolution;
+ }
tp->buttons.config_method.get_methods = tp_button_config_click_get_methods;
tp->buttons.config_method.set_method = tp_button_config_click_set_method;
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index ce79530..6f11599 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -431,17 +431,15 @@ tp_unpin_finger(struct tp_dispatch *tp, struct tp_touch *t)
return;
xdist = abs(t->point.x - t->pinned.center.x);
+ xdist *= tp->buttons.motion_dist.x_scale_coeff;
ydist = abs(t->point.y - t->pinned.center.y);
+ ydist *= tp->buttons.motion_dist.y_scale_coeff;
- if (xdist * xdist + ydist * ydist >=
- tp->buttons.motion_dist * tp->buttons.motion_dist) {
+ /* 3mm movement -> unpin */
+ if (vector_length(xdist, ydist) >= 3.0) {
t->pinned.is_pinned = false;
return;
}
-
- /* The finger may slowly drift, adjust the center */
- t->pinned.center.x = (t->point.x + t->pinned.center.x)/2;
- t->pinned.center.y = (t->point.y + t->pinned.center.y)/2;
}
static void
diff --git a/src/evdev-mt-touchpad.h b/src/evdev-mt-touchpad.h
index fef5cb3..bd2d163 100644
--- a/src/evdev-mt-touchpad.h
+++ b/src/evdev-mt-touchpad.h
@@ -223,7 +223,10 @@ struct tp_dispatch {
bool click_pending;
uint32_t state;
uint32_t old_state;
- uint32_t motion_dist; /* for pinned touches */
+ struct {
+ double x_scale_coeff;
+ double y_scale_coeff;
+ } motion_dist; /* for pinned touches */
unsigned int active; /* currently active button, for release event */
bool active_is_topbutton; /* is active a top button? */
diff --git a/src/libinput-util.h b/src/libinput-util.h
index 910406c..224e4b6 100644
--- a/src/libinput-util.h
+++ b/src/libinput-util.h
@@ -284,4 +284,10 @@ int parse_mouse_dpi_property(const char *prop);
int parse_mouse_wheel_click_angle_property(const char *prop);
double parse_trackpoint_accel_property(const char *prop);
+static inline double
+vector_length(double x, double y)
+{
+ return sqrt(x * x + y * y);
+}
+
#endif /* LIBINPUT_UTIL_H */
diff --git a/test/touchpad.c b/test/touchpad.c
index 692698c..1e5e97b 100644
--- a/test/touchpad.c
+++ b/test/touchpad.c
@@ -2153,6 +2153,53 @@ START_TEST(clickpad_click_n_drag)
}
END_TEST
+START_TEST(clickpad_finger_pin)
+{
+ struct litest_device *dev = litest_current_device();
+ struct libinput *li = dev->libinput;
+ struct libevdev *evdev = dev->evdev;
+ const struct input_absinfo *abs;
+
+ abs = libevdev_get_abs_info(evdev, ABS_MT_POSITION_X);
+ ck_assert_notnull(abs);
+ if (abs->resolution == 0)
+ return;
+
+ litest_drain_events(li);
+
+ /* make sure the movement generates pointer events when
+ not pinned */
+ litest_touch_down(dev, 0, 50, 50);
+ litest_touch_move_to(dev, 0, 50, 50, 52, 52, 10, 1);
+ litest_touch_move_to(dev, 0, 52, 52, 48, 48, 10, 1);
+ litest_touch_move_to(dev, 0, 48, 48, 50, 50, 10, 1);
+ litest_assert_only_typed_events(li, LIBINPUT_EVENT_POINTER_MOTION);
+
+ litest_button_click(dev, BTN_LEFT, true);
+ litest_drain_events(li);
+
+ litest_touch_move_to(dev, 0, 50, 50, 52, 52, 10, 1);
+ litest_touch_move_to(dev, 0, 52, 52, 48, 48, 10, 1);
+ litest_touch_move_to(dev, 0, 48, 48, 50, 50, 10, 1);
+
+ litest_assert_empty_queue(li);
+
+ litest_button_click(dev, BTN_LEFT, false);
+ litest_assert_only_typed_events(li, LIBINPUT_EVENT_POINTER_BUTTON);
+
+ /* still pinned after release */
+ litest_touch_move_to(dev, 0, 50, 50, 52, 52, 10, 1);
+ litest_touch_move_to(dev, 0, 52, 52, 48, 48, 10, 1);
+ litest_touch_move_to(dev, 0, 48, 48, 50, 50, 10, 1);
+
+ litest_assert_empty_queue(li);
+
+ /* move to unpin */
+ litest_touch_move_to(dev, 0, 50, 50, 70, 70, 10, 1);
+ litest_assert_only_typed_events(li, LIBINPUT_EVENT_POINTER_MOTION);
+}
+END_TEST
+
START_TEST(clickpad_softbutton_left)
{
struct litest_device *dev = litest_current_device();
@@ -5144,6 +5191,7 @@ litest_setup_tests(void)
litest_add("touchpad:click", touchpad_btn_left, LITEST_TOUCHPAD|LITEST_BUTTON, LITEST_CLICKPAD);
litest_add("touchpad:click", clickpad_btn_left, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:click", clickpad_click_n_drag, LITEST_CLICKPAD, LITEST_SINGLE_TOUCH);
+ litest_add("touchpad:click", clickpad_finger_pin, LITEST_CLICKPAD, LITEST_ANY);
litest_add("touchpad:softbutton", clickpad_softbutton_left, LITEST_CLICKPAD, LITEST_APPLE_CLICKPAD);
litest_add("touchpad:softbutton", clickpad_softbutton_right, LITEST_CLICKPAD, LITEST_APPLE_CLICKPAD);
--
2.4.3

7
libinput.spec
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@ -5,7 +5,7 @@
Name: libinput
Version: 0.17.0
Release: 3%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
Release: 4%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
Summary: Input device library
License: MIT
@ -19,6 +19,8 @@ Source0: http://www.freedesktop.org/software/libinput/libinput-%{version}
%endif
Patch01: 0001-filter-require-minimum-acceleration-factor-of-0.3.patch
Patch02: 0001-touchpad-fix-pinned-finger-drifting.patch
Patch03: 0001-touchpad-set-the-finger-pin-distance-to-5mm-where-po.patch
BuildRequires: git
BuildRequires: autoconf automake libtool pkgconfig
@ -96,6 +98,9 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
%changelog
* Tue Jun 16 2015 Peter Hutterer <peter.hutterer@redhat.com> 0.17.0-4
- Avoid erroneous finger movement after a physical click (#1230441)
* Fri Jun 12 2015 Peter Hutterer <peter.hutterer@redhat.com> 0.17.0-3
- Require udev.pc for the build