pyqt之阻止连续点击鼠标事件

import sys
import time

from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia
from PyQt5.QtWidgets import QApplication, QDialog, QVBoxLayout, QPushButton, QProgressDialog
from threading import Thread


class DemoDialog(QDialog):

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

        self.bn = QPushButton("Button")
        self.bn.clicked.connect(self.onBtnDoing)
        layout.addWidget(self.bn)
        self.setLayout(layout)

        self.setWindowTitle("Button demo")
        self.is_click = False
        self.my_thread = None

    def doingSomeThing(self):
        time.sleep(1)
        print("Pressed")
        self.bn.setEnabled(True)

    def onBtnDoing(self):
        self.bn.setEnabled(False)
        if self.my_thread is not None and self.my_thread.is_alive():
            return
        self.my_thread = Thread(target=self.doingSomeThing, args=())
        self.my_thread.start()


def main():
    app = QApplication(sys.argv)
    ex = DemoDialog()
    ex.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()