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#!/usr/bin/env python
#
# cursorpen.py
#
# this is the original prototype I made for this idea, taking code from
# https://github.com/Wazzaps/fingerpaint and modifying to work across
# the whole desktop.
#
# Use of this is not recommended, as this program is slow and inefficient
# compared to the C program, however it should still work.
#
import sys
from pynput.mouse import Button, Controller
from screeninfo import get_monitors
import subprocess as sp
import evdev
import contextlib
import pyudev
import screeninfo
scale = 1.5
@contextlib.contextmanager
def lock_pointer(devname):
sp.call(['xinput', 'disable', devname])
try:
yield
finally:
sp.call(['xinput', 'enable', devname])
def get_touchpad(udev):
for device in get_touchpads(udev):
dev_name = get_device_name(device).strip('"')
print('Using touchpad:', dev_name, file=sys.stderr)
try:
return evdev.InputDevice(device.device_node), dev_name
except PermissionError:
permission_error()
return None, None
def get_touchpads(udev):
for device in udev.list_devices(ID_INPUT_TOUCHPAD='1'):
if device.device_node is not None and device.device_node.rpartition('/')[2].startswith('event'):
yield device
def get_device_name(dev):
while dev is not None:
name = dev.properties.get('NAME')
if name:
return name
else:
dev = next(dev.ancestors, None)
def move_mouse(posx, posy):
x = (monitor.width * posx - monitor.width*0.4) * scale
y = (monitor.height * posy - monitor.height*0.1) * scale
#x = (monitor.width * posx)
#y = (monitor.height * posy)
mouse.position = (x, y)
def loop(touchpad):
x_absinfo = touchpad.absinfo(evdev.ecodes.ABS_X)
y_absinfo = touchpad.absinfo(evdev.ecodes.ABS_Y)
val_range = (x_absinfo.max - x_absinfo.min, y_absinfo.max - y_absinfo.min)
posx, posy = 0, 0
while True:
event = touchpad.read_one()
if event:
#print(posx, posy)
if event.type == evdev.ecodes.EV_ABS:
if event.code == evdev.ecodes.ABS_X:
posx = (event.value - x_absinfo.min) / val_range[0]
if event.code == evdev.ecodes.ABS_Y:
posy = (event.value - y_absinfo.min) / val_range[1]
move_mouse(posx, posy)
if event.type == evdev.ecodes.EV_KEY:
if event.code == evdev.ecodes.BTN_TOUCH and event.value == 0:
mouse.click(Button.left, 1)
if event.code == evdev.ecodes.BTN_LEFT:
if event.value:
mouse.press(Button.left)
else:
mouse.release(Button.left)
if event.code == evdev.ecodes.BTN_RIGHT:
if event.value:
mouse.press(Button.right)
else:
mouse.release(Button.right)
mouse = Controller()
monitor = get_monitors()[0]
udev = pyudev.Context()
touchpad, devname = get_touchpad(udev)
print(touchpad.path)
if touchpad is None:
print('No touchpad found', file=sys.stderr)
exit(1)
with lock_pointer(devname):
loop(touchpad)
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