PyQt/多线程使用/线程挂起恢复.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import ctypes
from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QProgressBar, QPushButton
import win32con
from win32process import SuspendThread, ResumeThread
# Created on 2018年3月13日
# author: Irony
# site: https://github.com/892768447
# email: 892768447@qq.com
# file: 多线程使用.a
# description:
__Author__ = 'By: Irony\nQQ: 892768447\nEmail: 892768447@qq.com'
__Copyright__ = 'Copyright (c) 2018 Irony'
__Version__ = 1.0
class Worker(QThread):
valueChanged = pyqtSignal(int) # 值变化信号
handle = -1
def run(self):
try:
self.handle = ctypes.windll.kernel32.OpenThread( # @UndefinedVariable
win32con.PROCESS_ALL_ACCESS, False, int(QThread.currentThreadId()))
except Exception as e:
print('get thread handle failed', e)
print('thread id', int(QThread.currentThreadId()))
for i in range(1, 101):
print('value', i)
self.valueChanged.emit(i)
QThread.sleep(1)
class Window(QWidget):
def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
layout = QVBoxLayout(self)
self.progressBar = QProgressBar(self)
self.progressBar.setRange(0, 100)
layout.addWidget(self.progressBar)
self.startButton = QPushButton('开启线程', self, clicked=self.onStart)
layout.addWidget(self.startButton)
self.suspendButton = QPushButton(
'挂起线程', self, clicked=self.onSuspendThread, enabled=False)
layout.addWidget(self.suspendButton)
self.resumeButton = QPushButton(
'恢复线程', self, clicked=self.onResumeThread, enabled=False)
layout.addWidget(self.resumeButton)
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self.stopButton = QPushButton(
'终止线程', self, clicked=self.onStopThread, enabled=False)
layout.addWidget(self.stopButton)
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# 当前线程id
print('main id', int(QThread.currentThreadId()))
# 子线程
self._thread = Worker(self)
self._thread.finished.connect(self._thread.deleteLater)
self._thread.valueChanged.connect(self.progressBar.setValue)
def onStart(self):
print('main id', int(QThread.currentThreadId()))
self._thread.start() # 启动线程
self.startButton.setEnabled(False)
self.suspendButton.setEnabled(True)
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self.stopButton.setEnabled(True)
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def onSuspendThread(self):
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if self._thread.handle == -1:
return print('handle is wrong')
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ret = SuspendThread(self._thread.handle)
print('挂起线程', self._thread.handle, ret)
self.suspendButton.setEnabled(False)
self.resumeButton.setEnabled(True)
def onResumeThread(self):
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if self._thread.handle == -1:
return print('handle is wrong')
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ret = ResumeThread(self._thread.handle)
print('恢复线程', self._thread.handle, ret)
self.suspendButton.setEnabled(True)
self.resumeButton.setEnabled(False)
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def onStopThread(self):
self.startButton.setEnabled(False)
self.suspendButton.setEnabled(False)
self.resumeButton.setEnabled(False)
ret = ctypes.windll.kernel32.TerminateThread( # @UndefinedVariable
self._thread.handle, 0)
print('终止线程', self._thread.handle, ret)
self.stopButton.setEnabled(False)
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def closeEvent(self, event):
if self._thread.isRunning():
self._thread.quit()
# 强制
# self._thread.terminate()
del self._thread
super(Window, self).closeEvent(event)
if __name__ == '__main__':
import sys
import os
print('pid', os.getpid())
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
w = Window()
w.show()
sys.exit(app.exec_())