PyQt4 ---- I want to use closeEvent() in my code

Question

I am python newbie. I am developing pr-room management program. I think if the user presses the x button , i want to give a warning message . So, I want to use closeEvent() in first code. In other words, first code + second code please

---

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

# Form implementation generated from reading ui file 'C:\Users\PJH11\Desktop\dia3.ui'
#
# Created: Sun Aug 17 16:23:08 2014
#      by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

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)

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName(_fromUtf8("Dialog"))
        Dialog.resize(190, 98)
        self.pushButton = QtGui.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(0, 0, 191, 101))
        font = QtGui.QFont()
        font.setPointSize(13)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))
        self.pushButton.setText(_translate("Dialog", "hi", None))


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Dialog = QtGui.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())

---

def closeEvent(self, event):

    reply = QtGui.QMessageBox.question(self, 'Message',
        "Are you sure to quit?", QtGui.QMessageBox.Yes | 
        QtGui.QMessageBox.No, QtGui.QMessageBox.No)

    if reply == QtGui.QMessageBox.Yes:
        event.accept()
    else:
        event.ignore()

Answer 1

Your can implement your class to create closeEvent (As your code close event), put them it and create object in main. And your can call to close event by using bool QWidget.close (self).

Full example;

from PyQt4 import QtCore, QtGui

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)

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        self.Dialog = Dialog
        self.Dialog.setObjectName(_fromUtf8("self.Dialog"))
        self.Dialog.resize(190, 98)
        self.pushButton = QtGui.QPushButton(self.Dialog)
        self.pushButton.setGeometry(QtCore.QRect(0, 0, 191, 101))
        font = QtGui.QFont()
        font.setPointSize(13)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.retranslateUi(self.Dialog)
        QtCore.QMetaObject.connectSlotsByName(self.Dialog)
        QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL('released()'), self.Dialog.close) # <- put signal to close when clicked.

    def retranslateUi(self, Dialog):
        self.Dialog.setWindowTitle(_translate("self.Dialog", "self.Dialog", None))
        self.pushButton.setText(_translate("self.Dialog", "hi", None))

class QCustomDialog (QtGui.QDialog): # <- Implement your own
    def closeEvent(self, event):
        reply = QtGui.QMessageBox.question(self, 'Message',
            "Are you sure to quit?", QtGui.QMessageBox.Yes | 
            QtGui.QMessageBox.No, QtGui.QMessageBox.No)
        if reply == QtGui.QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Dialog = QCustomDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())

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Regards,