#!/usr/bin/env python
# -*- encoding: utf-8 -*-
'''
@Contact :   liuyuqi.gov@msn.cn
@Time    :   2022/10/05 06:14:26
@License :   Copyright © 2017-2022 liuyuqi. All Rights Reserved.
@Desc    :   
'''

import threading
from ctypes import *
import time
import subprocess

class ComputerMonitor:
    '''
    
    '''
    def __init__(self, callback):
        self.callback = callback
        self.started = False

    def monit_windows_lock(self):
        while True:
            process_name='LogonUI.exe'
            callall='TASKLIST'
            outputall=subprocess.check_output(callall)
            outputstringall=str(outputall)
            if process_name in outputstringall:
                print("Locked.")
                if self.callback:
                    self.callback()
            else: 
               pass
            time.sleep(1)

    def start(self):
        monitor_threading = threading.Thread(target=self.monit_windows_lock, args=())
        monitor_threading.start()
        self.started = True