使用python uvdev设置绝对光标位置

Question

I'm trying to simulate a graphics tablet in python, and as a result, I need to be able to set the absolute position of the cursor. I have tried python-evdev and python-libevdev , but I'm unable to set the absolute position. Wring values to the EV_ABS ABS_X and ABS_Y simply doesn't take any effect on a cursor position. It worth mentioning that simulated buttons and relative positioning work perfectly.

I'm using Manjaro 4.19 with Gnome on x11.

I would appreciate any help and thank you in advance.

Here's simple code which must be able to set the absolute cursor position, but it's not.

from evdev import UInput, AbsInfo, ecodes as e
import pyautogui
import subprocess
import time

cap = {
    e.EV_KEY : [e.BTN_TOUCH],
    e.EV_ABS : [
        (e.ABS_X, AbsInfo(0, 0, 4080, 0, 0, 5080)),         
        (e.ABS_Y, AbsInfo(0, 0, 4080, 0, 0, 5080)),
        (e.ABS_PRESSURE, AbsInfo(0, 0, 2040, 0, 0, 0))
    ]
}

ui = UInput(cap, name='example-device', version=0x3)

for i in range(0,10):
    # assign driver to the default display
    time.sleep(0.5)
    process = subprocess.Popen(["xinput", "list"], shell=True, stdout=subprocess.PIPE)
    output = process.stdout.read().decode("utf-8")
    print(output)
    if "example-device" in output:
        print(output)
        subprocess.Popen([
            "xinput",
            "map-to-output",
            f"pointer:example-device",
            "eDP1"
        ])
        break
else:
    raise Exception("Can't map device to display.")

# print cursor position befor cahnge
print(pyautogui.position())

# move mouse cursor
ui.write(e.EV_ABS, e.ABS_X, 20)
ui.write(e.EV_ABS, e.ABS_Y, 20)
ui.syn()
# print cursor position after cahnge
print(pyautogui.position())

Answer 1

Ok. I think to solve this you need to add BTN_TOOL_PEN to EV_KEY. At least this is worked for me. If you are interested you can see the whole project on my github .