PYQT4：关键消息框

Question

好的，不知道我在这里缺少什么。我已经为工作创建了一个GUI应用程序，其中包含一个关闭按钮。如果用户使用自定义窗口关闭按钮，我可以执行closeEvent函数。但是，当他们单击GUI上的关闭按钮时，我无法产生相同的效果。下面是我的代码，错误和我的GUI图片，展示了我的问题。在此先感谢您的帮助。

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'icMainWin.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import icMainWin_rc
import sys
import os
import time
import os.path as osp
import ctypes
from ctypes import wintypes
import os


try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)



#setting the path variable for icon
path = osp.join(osp.dirname(sys.modules[__name__].__file__), 'I:\\Infection Control System Database\images\Malware-icon.png')
myappid = 'I:\\Infection Control System Database\images\Malware-icon.png' # arbitrary string
ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(myappid)
lpBuffer = wintypes.LPWSTR()
AppUserModelID = ctypes.windll.shell32.GetCurrentProcessExplicitAppUserModelID
AppUserModelID(ctypes.cast(ctypes.byref(lpBuffer), wintypes.LPWSTR))
appid = lpBuffer.value
ctypes.windll.kernel32.LocalFree(lpBuffer)
if appid is not None:
    print(appid)
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(905, 675)
        MainWindow.setMinimumSize(QtCore.QSize(905, 675))
        MainWindow.setMaximumSize(QtCore.QSize(905, 680))
        font = QtGui.QFont()
        font.setBold(False)
        font.setWeight(50)
        MainWindow.setFont(font)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8("I:\Infection Control System Database\Program Files\images\ICDatabaseImage.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        MainWindow.setWindowIcon(icon)

代码被截断用于发布

        self.retranslateUi(MainWindow)
        QtCore.QObject.connect(self.actionExit, QtCore.SIGNAL(_fromUtf8("triggered()")), self.btnExit.click)
        QtCore.QObject.connect(self.actionWar_Room, QtCore.SIGNAL(_fromUtf8("triggered()")), self.cmdWarRoom.click)
        QtCore.QObject.connect(self.actionFlu, QtCore.SIGNAL(_fromUtf8("triggered()")), self.btnFlu.click)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
        MainWindow.setTabOrder(self.btnExit, self.btnHelp)
        MainWindow.setTabOrder(self.btnHelp, self.btnRequest)
        MainWindow.setTabOrder(self.btnRequest, self.btnSOR_IFMC)
        MainWindow.setTabOrder(self.btnSOR_IFMC, self.btnSOR_IAH)
        MainWindow.setTabOrder(self.btnSOR_IAH, self.btnSOR_ILH)
        MainWindow.setTabOrder(self.btnSOR_ILH, self.btnSOR_IMVH)
        MainWindow.setTabOrder(self.btnSOR_IMVH, self.btnSOR_IFOH)
        MainWindow.setTabOrder(self.btnSOR_IFOH, self.cmdEmail)
        MainWindow.setTabOrder(self.cmdEmail, self.cmdHCSBrpt)
        MainWindow.setTabOrder(self.cmdHCSBrpt, self.cmdWarRoom)
        MainWindow.setTabOrder(self.cmdWarRoom, self.cmdReview)
        MainWindow.setTabOrder(self.cmdReview, self.cmdIC_AccessDB)
        MainWindow.setTabOrder(self.cmdIC_AccessDB, self.btnCaseCAUTI)
        MainWindow.setTabOrder(self.btnCaseCAUTI, self.btnCaseCLABSI)
        MainWindow.setTabOrder(self.btnCaseCLABSI, self.btnCaseSSI)
        MainWindow.setTabOrder(self.btnCaseSSI, self.btnCaseVAP)
        MainWindow.setTabOrder(self.btnCaseVAP, self.btnCaseLabID)
        MainWindow.setTabOrder(self.btnCaseLabID, self.btnCaseMDRO)
        MainWindow.setTabOrder(self.btnCaseMDRO, self.btnHH)
        MainWindow.setTabOrder(self.btnHH, self.btnNHSN)
        MainWindow.setTabOrder(self.btnNHSN, self.btnHAI)
        MainWindow.setTabOrder(self.btnHAI, self.btnPremier)
        MainWindow.setTabOrder(self.btnPremier, self.btnFlu)
        MainWindow.setTabOrder(self.btnFlu, self.btnMicrosoft)
        MainWindow.setTabOrder(self.btnMicrosoft, self.dateEdit)
        MainWindow.setTabOrder(self.dateEdit, self.timeEdit)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(_translate("MainWindow", "Infection Control Database - Landing Page", None))
        self.lblWelcome.setText(_translate("MainWindow", "Welcome!", None))
        self.dateEdit.setDisplayFormat(_translate("MainWindow", "MMMM dd yyyy", None))
        self.btnExit.setStatusTip(_translate("MainWindow", "Exit Database", None))
        self.btnExit.setText(_translate("MainWindow", "Exit", None))
        self.btnExit.setShortcut(_translate("MainWindow", "Ctrl+Shift+Q", None))
        self.btnHelp.setText(_translate("MainWindow", "Help", None))
        self.btnRequest.setText(_translate("MainWindow", "Request ", None))
        self.grpReportsSOR.setStatusTip(_translate("MainWindow", "SOR Reports", None))
        self.grpReportsSOR.setTitle(_translate("MainWindow", "SOR Files", None))
        self.btnSOR_IFMC.setText(_translate("MainWindow", "IFMC", None))
        self.btnSOR_IAH.setText(_translate("MainWindow", "IAH", None))
        self.btnSOR_ILH.setText(_translate("MainWindow", "ILH", None))
        self.btnSOR_IMVH.setText(_translate("MainWindow", "IMVH", None))
        self.btnSOR_IFOH.setText(_translate("MainWindow", "IFOH", None))
        self.grp_EnterCaseData.setTitle(_translate("MainWindow", "Case Data Entry", None))
        self.btnCaseCAUTI.setStatusTip(_translate("MainWindow", "Enter CAUTI Case", None))
        self.btnCaseCAUTI.setText(_translate("MainWindow", "CAUTI Case", None))
        self.btnCaseCLABSI.setStatusTip(_translate("MainWindow", "Enter CLABSI Case ", None))
        self.btnCaseCLABSI.setText(_translate("MainWindow", "CLABSI Case", None))
        self.btnCaseSSI.setStatusTip(_translate("MainWindow", "Enter SSI Case", None))
        self.btnCaseSSI.setText(_translate("MainWindow", "SSI Case", None))
        self.btnCaseVAP.setStatusTip(_translate("MainWindow", "Enter VAP Case", None))
        self.btnCaseVAP.setText(_translate("MainWindow", "VAP Case", None))
        self.btnCaseLabID.setStatusTip(_translate("MainWindow", "Enter LabID Case", None))
        self.btnCaseLabID.setText(_translate("MainWindow", "LabID Case", None))
        self.btnCaseMDRO.setStatusTip(_translate("MainWindow", "Enter MDRO Cases", None))
        self.btnCaseMDRO.setText(_translate("MainWindow", "MDRO", None))
        self.cmdEmail.setText(_translate("MainWindow", "Email", None))
        self.cmdHCSBrpt.setText(_translate("MainWindow", "HCSB Report", None))
        self.cmdWarRoom.setText(_translate("MainWindow", "War Room Report", None))
        self.cmdReview.setText(_translate("MainWindow", "Review HAI Data", None))
        self.cmdIC_AccessDB.setText(_translate("MainWindow", "2011 IC Access Database", None))
        self.label.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-weight:600; color:#aa0000;\">Infection Control Database</span></p></body></html>", None))
        self.btnHH.setStatusTip(_translate("MainWindow", "Hand Hygiene Application", None))
        self.btnNHSN.setStatusTip(_translate("MainWindow", "NHSN Website", None))
        self.btnHAI.setStatusTip(_translate("MainWindow", "HAI Folder", None))
        self.btnPremier.setStatusTip(_translate("MainWindow", "Navigate to SafetySurveillor: https://ss.premierinc.com/Setnet/user/Login.po ", None))
        self.btnFlu.setStatusTip(_translate("MainWindow", "Flu Reports", None))
        self.groupBox.setStatusTip(_translate("MainWindow", "Navigate to Location", None))
        self.groupBox.setTitle(_translate("MainWindow", "Navigation ", None))
        self.menuFile.setTitle(_translate("MainWindow", "File", None))
        self.menuEnd_Processes.setTitle(_translate("MainWindow", "End Processes", None))
        self.menuView.setTitle(_translate("MainWindow", "View", None))
        self.menuReports.setTitle(_translate("MainWindow", "Reports", None))
        self.actionExit.setText(_translate("MainWindow", "Exit", None))
        self.actionExit.setShortcut(_translate("MainWindow", "Ctrl+Shift+Q", None))
        self.actionTerminate_Excel.setText(_translate("MainWindow", "Terminate Excel", None))
        self.actionTerminate_Access.setText(_translate("MainWindow", "Terminate Access", None))
        self.actionTerminate_Powerpoint.setText(_translate("MainWindow", "Terminate PowerP", None))
        self.actionTerminate_Word.setText(_translate("MainWindow", "Terminate Word", None))
        self.actionReset_Citrix.setText(_translate("MainWindow", "Reset Citrix", None))
        self.actionReset_Citrix.setStatusTip(_translate("MainWindow", "Reset Citrix Server", None))
        self.actionTerminate_Outlook.setText(_translate("MainWindow", "Terminate Outlook", None))
        self.actionHCSB.setText(_translate("MainWindow", "HCSB", None))
        self.actionWar_Room.setText(_translate("MainWindow", "War Room", None))
        self.actionFlu.setText(_translate("MainWindow", "Flu", None))

Signal Event (Email)

        self.cmdEmail.clicked.connect(self.EmailClicked)

Signal Event (Exit)

        self.btnExit.clicked.connect(self.ExitClicked)

Action Event (Email)

    def EmailClicked(self):os.startfile('C:\\Program Files\Microsoft Office\Office14\OUTLOOK.EXE')

Action Event (Exit)

    def ExitClicked(self):
        ret = QMessageBox.critical(self, "Critical", 
              'Are you sure you want to exit?', QMessageBox.Ok, QMessageBox.Cancel)
        ret = msgBox.exec_()

        if ret == msgBox.Yes: 
            QtCore.QCoreApplication.instance().quit()

class ControlMainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(ControlMainWindow, self).__init__(parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)



        self.ui.dateEdit.setDisplayFormat("MMM dd yyyy")
        self.ui.timeEdit.setDisplayFormat("hh:mm:ss AP")
        self.updateTime()
        self.timer = QtCore.QTimer(self)
        self.timer.timeout.connect(self.updateTime)
        self.timer.start(1000)

    def updateTime(self):
        current = QtCore.QDateTime.currentDateTime()
        self.ui.dateEdit.setDate(current.date())
        self.ui.timeEdit.setTime(current.time())


    def closeEvent(self, event):
        result = QtGui.QMessageBox.critical(self,
                                            "Confirm Exit...",
                                            "Are you sure you want to exit?",
                                            QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
        event.ignore()

        if result == QtGui.QMessageBox.Yes:
            event.accept()

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    #app.setStyle( "Classic" )
    mySW = ControlMainWindow()
    mySW.show()
    sys.exit(app.exec_())

Answer 1

您生成的代码会生成错误，因为QMessageBox.critical需要传递QObject对象而Ui_MainWindow不需要。

class Ui_MainWindow(object):
    ....
    def ExitClicked(self):
        ret = QMessageBox.critical(self, "Critical", 
              'Are you sure you want to exit?', QMessageBox.Ok, QMessageBox.Cancel)
        ret = msgBox.exec_()

        if ret == msgBox.Yes: 
            QtCore.QCoreApplication.instance().quit()

此外，您希望按下按钮关闭默认值并且您的新关闭按钮具有相同的行为，您必须使用close函数连接发出新按钮的信号，因为close函数调用closeEvent。

class Ui_MainWindow(object):
    ....


class ControlMainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(ControlMainWindow, self).__init__(parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.btnExit.clicked.connect(self.close)
        ....

    def closeEvent(self, event):
        result = QtGui.QMessageBox.critical(self,
                                        "Confirm Exit...",
                                        "Are you sure you want to exit?",
                                        QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
        event.ignore()

        if result == QtGui.QMessageBox.Yes:
            event.accept()

删除连接：self.btnExit.clicked.connect(self.ExitClicked)和功能def ExitClicked(self): ...