PyQt5 -- QThread 사용하기 &  thread 간 통신하기





from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


class MyMainGUI(QDialog):
def __init__(self, parent=None):
super().__init__(parent)

self.qtxt1 = QTextEdit(self)
self.btn1 = QPushButton("Start", self)
self.btn2 = QPushButton("Stop", self)
self.btn3 = QPushButton("add 100", self)
self.btn4 = QPushButton("send instance", self)

vbox = QVBoxLayout()
vbox.addWidget(self.qtxt1)
vbox.addWidget(self.btn1)
vbox.addWidget(self.btn2)
vbox.addWidget(self.btn3)
vbox.addWidget(self.btn4)
self.setLayout(vbox)

self.setGeometry(100, 50, 300, 300)

class Test:
def __init__(self):
name = ""


class MyMain(MyMainGUI):
add_sec_signal = pyqtSignal()
send_instance_singal = pyqtSignal("PyQt_PyObject")

def __init__(self, parent=None):
super().__init__(parent)

self.btn1.clicked.connect(self.time_start)
self.btn2.clicked.connect(self.time_stop)
self.btn3.clicked.connect(self.add_sec)
self.btn4.clicked.connect(self.send_instance)

self.th = Worker(parent=self)
self.th.sec_changed.connect(self.time_update) # custom signal from worker thread to main thread

self.add_sec_signal.connect(self.th.add_sec) # custom signal from main thread to worker thread
self.send_instance_singal.connect(self.th.recive_instance_singal)
self.show()

@pyqtSlot()
def time_start(self):
self.th.start()
self.th.working = True

@pyqtSlot()
def time_stop(self):
self.th.working = False

@pyqtSlot()
def add_sec(self):
print(".... add singal emit....")
self.add_sec_signal.emit()

@pyqtSlot(str)
def time_update(self, msg):
self.qtxt1.append(msg)

@pyqtSlot()
def send_instance(self):
t1 = Test()
t1.name = "SuperPower!!!"
self.send_instance_singal.emit(t1)


class Worker(QThread):
sec_changed = pyqtSignal(str)

def __init__(self, sec=0, parent=None):
super().__init__()
self.main = parent
self.working = True
self.sec = sec

# self.main.add_sec_signal.connect(self.add_sec) # 이것도 작동함. # custom signal from main thread to worker thread

def __del__(self):
print(".... end thread.....")
self.wait()

def run(self):
while self.working:
self.sec_changed.emit('time (secs):{}'.format(self.sec))
self.sleep(1)
self.sec += 1

@pyqtSlot()
def add_sec(self):
print("add_sec....")
self.sec += 100

@pyqtSlot("PyQt_PyObject")
def recive_instance_singal(self, inst):
print(inst.name)



if __name__ == "__main__":
import sys

app = QApplication(sys.argv)
form = MyMain()
app.exec_()




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Posted by 자유프로그램

댓글을 달아 주세요

  1. BEST 2019.09.05 20:56  댓글주소  수정/삭제  댓글쓰기

    정말 정말 유용합니다.
    Qthread의 모든게 담겨져 있네요.
    잘 배워갑니다!