cutiepi-button-handler/bin/cutiepi-button-handler

77 lines
1.8 KiB
Python
Executable File

#!/usr/bin/env python
import os
import re
import subprocess
from gi.repository import GLib
from dbus import SessionBus
from dbus.mainloop.glib import DBusGMainLoop
previous_xrandr = 'xrandr --output DSI-1 --auto'
xinput_regex = re.compile(r'.*Capacitive TouchScreen\s+id=(\d+).*')
def get_current_xrandr() -> str:
proc = subprocess.Popen(['unxrandr'], stdout=subprocess.PIPE)
return proc.communicate()[0].decode().strip()
def get_touchscreen_id() -> int:
proc = subprocess.Popen(['xinput'], stdout=subprocess.PIPE)
for line in proc.communicate()[0].decode().split('\n'):
if m := xinput_regex.match(line):
return int(m.group(1))
assert 'Touchscreen device not found'
def is_display_on() -> bool:
proc = subprocess.Popen(['xrandr', '-q'], stdout=subprocess.PIPE)
out = proc.communicate()[0].decode().strip()
lines = [
line for line in out.split('\n')
if line.startswith('DSI-1 ')
]
assert lines, 'Display DSI-1 not found'
m = re.search(r'^DSI-1\s+(connected\s+)?(primary\s+)?\d+x\d+\+\d+\+\d+', lines[0])
return m is not None
def signal_handler(name, _):
global previous_xrandr
if name != 'button':
return
is_on = is_display_on()
touchscreen_id = get_touchscreen_id()
if is_on:
previous_xrandr = get_current_xrandr()
os.system('xrandr --output DSI-1 --off')
os.system(f'xinput disable {touchscreen_id}')
else:
os.system(previous_xrandr)
os.system(f'xinput enable {touchscreen_id}')
def main():
loop = DBusGMainLoop()
bus = SessionBus(mainloop=loop)
bus.add_signal_receiver(
signal_handler, 'updateEvent',
'io.cutiepi.interface', path='/mcu'
)
loop = GLib.MainLoop()
try:
loop.run()
finally:
loop.quit()
if __name__ == '__main__':
main()