mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
synced 2025-12-20 15:00:05 +01:00
35cbeb7eac
And make sure the equivalent entry in the measure touch-size is long enough to
overwrite the current status line
https://gitlab.freedesktop.org/libinput/libinput/issues/42
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit a5700dcf43)
302 lines
9.1 KiB
Python
Executable file
302 lines
9.1 KiB
Python
Executable file
#!/usr/bin/env python3
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# vim: set expandtab shiftwidth=4:
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# -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
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#
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# Copyright © 2017 Red Hat, Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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#
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import sys
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import argparse
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try:
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import evdev
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import evdev.ecodes
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import pyudev
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except ModuleNotFoundError as e:
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print('Error: {}'.format(str(e)), file=sys.stderr)
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print('One or more python modules are missing. Please install those '
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'modules and re-run this tool.')
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sys.exit(1)
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class Range(object):
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"""Class to keep a min/max of a value around"""
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def __init__(self):
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self.min = float('inf')
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self.max = float('-inf')
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def update(self, value):
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self.min = min(self.min, value)
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self.max = max(self.max, value)
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class Touch(object):
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"""A single data point of a sequence (i.e. one event frame)"""
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def __init__(self, pressure=None):
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self.pressure = pressure
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class TouchSequence(object):
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"""A touch sequence from beginning to end"""
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def __init__(self, device, tracking_id):
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self.device = device
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self.tracking_id = tracking_id
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self.points = []
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self.is_active = True
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self.is_down = False
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self.was_down = False
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self.is_palm = False
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self.was_palm = False
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self.prange = Range()
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def append(self, touch):
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"""Add a Touch to the sequence"""
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self.points.append(touch)
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self.prange.update(touch.pressure)
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if touch.pressure < self.device.up:
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self.is_down = False
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elif touch.pressure > self.device.down:
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self.is_down = True
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self.was_down = True
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self.is_palm = touch.pressure > self.device.palm
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if self.is_palm:
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self.was_palm = True
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def finalize(self):
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"""Mark the TouchSequence as complete (finger is up)"""
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self.is_active = False
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def avg(self):
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"""Average pressure value of this sequence"""
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return int(sum([p.pressure for p in self.points])/len(self.points))
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def median(self):
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"""Median pressure value of this sequence"""
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ps = sorted([p.pressure for p in self.points])
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idx = int(len(self.points)/2)
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return ps[idx]
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def __str__(self):
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return self._str_state() if self.is_active else self._str_summary()
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def _str_summary(self):
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if not self.points:
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return "{:78s}".format("Sequence: no pressure values recorded")
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s = "Sequence {} pressure: "\
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"min: {:3d} max: {:3d} avg: {:3d} median: {:3d} tags:" \
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.format(
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self.tracking_id,
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self.prange.min,
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self.prange.max,
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self.avg(),
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self.median()
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)
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if self.was_down:
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s += " down"
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if self.was_palm:
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s += " palm"
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return s
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def _str_state(self):
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s = "Touchpad pressure: {:3d} min: {:3d} max: {:3d} tags: {} {}" \
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.format(
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self.points[-1].pressure,
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self.prange.min,
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self.prange.max,
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"down" if self.is_down else " ",
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"palm" if self.is_palm else " "
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)
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return s
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class InvalidDeviceError(Exception):
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pass
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class Device(object):
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def __init__(self, path):
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if path is None:
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self.path = self.find_touchpad_device()
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else:
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self.path = path
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self.device = evdev.InputDevice(self.path)
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print("Using {}: {}\n".format(self.device.name, self.path))
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# capabilities rturns a dict with the EV_* codes as key,
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# each of which is a list of tuples of (code, AbsInfo)
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#
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# Get the abs list first (or empty list if missing),
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# then extract the pressure absinfo from that
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all_caps = self.device.capabilities(absinfo=True)
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caps = all_caps.get(evdev.ecodes.EV_ABS, [])
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p = [cap[1] for cap in caps if cap[0] == evdev.ecodes.ABS_MT_PRESSURE]
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if not p:
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raise InvalidDeviceError("device does not have ABS_MT_PRESSURE")
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p = p[0]
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prange = p.max - p.min
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# libinput defaults
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self.down = int(p.min + 0.12 * prange)
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self.up = int(p.min + 0.10 * prange)
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self.palm = 130 # the libinput default
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self._init_thresholds_from_udev()
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self.sequences = []
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def find_touchpad_device(self):
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context = pyudev.Context()
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for device in context.list_devices(subsystem='input'):
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if not device.get('ID_INPUT_TOUCHPAD', 0):
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continue
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if not device.device_node or \
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not device.device_node.startswith('/dev/input/event'):
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continue
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return device.device_node
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print("Unable to find a touchpad device.", file=sys.stderr)
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sys.exit(1)
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def _init_thresholds_from_udev(self):
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context = pyudev.Context()
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ud = pyudev.Devices.from_device_file(context, self.path)
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v = ud.get('LIBINPUT_ATTR_PRESSURE_RANGE')
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if v:
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self.down, self.up = colon_tuple(v)
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v = ud.get('LIBINPUT_ATTR_PALM_PRESSURE_THRESHOLD')
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if v:
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self.palm = int(v)
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def start_new_sequence(self, tracking_id):
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self.sequences.append(TouchSequence(self, tracking_id))
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def current_sequence(self):
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return self.sequences[-1]
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def handle_key(device, event):
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tapcodes = [
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evdev.ecodes.BTN_TOOL_DOUBLETAP,
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evdev.ecodes.BTN_TOOL_TRIPLETAP,
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evdev.ecodes.BTN_TOOL_QUADTAP,
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evdev.ecodes.BTN_TOOL_QUINTTAP
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]
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if event.code in tapcodes and event.value > 0:
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print("\rThis tool cannot handle multiple fingers, "
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"output will be invalid", file=sys.stderr)
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def handle_abs(device, event):
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if event.code == evdev.ecodes.ABS_MT_TRACKING_ID:
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if event.value > -1:
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device.start_new_sequence(event.value)
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else:
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s = device.current_sequence()
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s.finalize()
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print("\r{}".format(s))
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elif event.code == evdev.ecodes.ABS_MT_PRESSURE:
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s = device.current_sequence()
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s.append(Touch(pressure=event.value))
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print("\r{}".format(s), end="")
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def handle_event(device, event):
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if event.type == evdev.ecodes.EV_ABS:
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handle_abs(device, event)
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elif event.type == evdev.ecodes.EV_KEY:
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handle_key(device, event)
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def loop(device):
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print("Ready for recording data.")
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print("Pressure range used: {}:{}".format(device.down, device.up))
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print("Palm pressure range used: {}".format(device.palm))
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print("Place a single finger on the touchpad to measure pressure values.\n"
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"Ctrl+C to exit\n")
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for event in device.device.read_loop():
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handle_event(device, event)
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def colon_tuple(string):
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try:
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ts = string.split(':')
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t = tuple([int(x) for x in ts])
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if len(t) == 2 and t[0] >= t[1]:
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return t
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except:
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pass
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msg = "{} is not in format N:M (N >= M)".format(string)
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raise argparse.ArgumentTypeError(msg)
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def main(args):
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parser = argparse.ArgumentParser(
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description="Measure touchpad pressure values"
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)
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parser.add_argument(
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'path', metavar='/dev/input/event0', nargs='?', type=str,
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help='Path to device (optional)'
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)
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parser.add_argument(
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'--touch-thresholds', metavar='down:up', type=colon_tuple,
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help='Thresholds when a touch is logically down or up'
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)
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parser.add_argument(
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'--palm-threshold', metavar='t', type=int,
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help='Threshold when a touch is a palm'
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)
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args = parser.parse_args()
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try:
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device = Device(args.path)
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if args.touch_thresholds is not None:
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device.down, device.up = args.touch_thresholds
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if args.palm_threshold is not None:
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device.palm = args.palm_threshold
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loop(device)
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except KeyboardInterrupt:
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pass
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except (PermissionError, OSError):
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print("Error: failed to open device")
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except InvalidDeviceError as e:
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print("Error: {}".format(e))
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if __name__ == "__main__":
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main(sys.argv)
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