Python 使用父窗口的closeevent关闭pyqt messageBox

我有一块蛋糕

def __init__():
    self._taskInProgress = threading.Event()


def isFinished(self):
    self._taskInProgress.clear()
    self.progressBar.hide()
    self.close()


def closeEvent(self, event):
    if self._taskInProgress.is_set():
        reply = QtGui.QMessageBox.question(self, "Are you sure you want to quit? ",
            "Task is in progress !",
            QtGui.QMessageBox.Yes,
            QtGui.QMessageBox.No)
        if reply == QtGui.QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()

问题是，如果有人关闭父窗口（即self），则会显示上述提示，但如果有人未在此消息框中按yes或no，则父窗口不会关闭

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那个么，当任务完成时，我应该如何实现呢？

QMessageBox

（即reply）也被iteslef关闭，就像调用

reply.close（）

另一种方法，就是通过不按窗口中的X按钮来调用close小部件。（在本例中是call

isFinished

）。我们可以重写is close方法并向控件添加标志。像这样,

import sys
from PyQt4 import QtCore, QtGui

class QCsMainWindow (QtGui.QMainWindow):
    def __init__ (self):
        super(QCsMainWindow, self).__init__()
        self.isDirectlyClose = False
        QtCore.QTimer.singleShot(5 * 1000, self.close) # For simulate test direct close 

    def close (self):
        for childQWidget in self.findChildren(QtGui.QWidget):
            childQWidget.close()
        self.isDirectlyClose = True
        return QtGui.QMainWindow.close(self)

    def closeEvent (self, eventQCloseEvent):
        if self.isDirectlyClose:
            eventQCloseEvent.accept()
        else:
            answer = QtGui.QMessageBox.question (
                self,
                'Are you sure you want to quit ?',
                'Task is in progress !',
                QtGui.QMessageBox.Yes,
                QtGui.QMessageBox.No)
            if (answer == QtGui.QMessageBox.Yes) or (self.isDirectlyClose == True):
                eventQCloseEvent.accept()
            else:
                eventQCloseEvent.ignore()

appQApplication = QtGui.QApplication(sys.argv)
mainQWidget = QCsMainWindow()
mainQWidget.show()
sys.exit(appQApplication.exec_())