Qt Designer PyQt5 覆盖CloseEvent 子窗口不起作用 [英] Qt Designer PyQt5 overwrite CloseEvent child window don't work

问题描述

我在 QtDesigner 中设计了三个窗口.主窗口使用按钮调用两个子窗口.如果我关闭主窗口，子窗口也会关闭，我通过覆盖主窗口中的 closeEvent 来做到这一点.我需要在子窗口的 closeEvent 中实现一些东西，所以我覆盖了子类的 closeEvent 但它什么也不做.请帮忙.

I have three windows designed in QtDesigner. The main window calls the two childs windows using buttons. If I close the main window the childs windows also close, I did this by overwriting the closeEvent in the main window. I need to implement some stuff in the closeEvent of the child window so I overwritten the closeEvent of the child class but it does nothing. Please help.

Qt Designer 制作的主窗口类

Class of the main window made in Qt Designer

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_ventanaPrincipal(object):
    def setupUi(self, ventanaPrincipal):
        ventanaPrincipal.setObjectName("ventanaPrincipal")
        ventanaPrincipal.resize(267, 238)
        self.centralWidget = QtWidgets.QWidget(ventanaPrincipal)
        self.centralWidget.setObjectName("centralWidget")
        self.buttonVentana1 = QtWidgets.QPushButton(self.centralWidget)
        self.buttonVentana1.setGeometry(QtCore.QRect(60, 30, 141, 25))
        self.buttonVentana1.setObjectName("buttonVentana1")
        self.buttonVentana2 = QtWidgets.QPushButton(self.centralWidget)
        self.buttonVentana2.setGeometry(QtCore.QRect(60, 80, 141, 25))
        self.buttonVentana2.setObjectName("buttonVentana2")
        ventanaPrincipal.setCentralWidget(self.centralWidget)
        self.menuBar = QtWidgets.QMenuBar(ventanaPrincipal)
        self.menuBar.setGeometry(QtCore.QRect(0, 0, 267, 22))
        self.menuBar.setObjectName("menuBar")
        ventanaPrincipal.setMenuBar(self.menuBar)
        self.mainToolBar = QtWidgets.QToolBar(ventanaPrincipal)
        self.mainToolBar.setObjectName("mainToolBar")
        ventanaPrincipal.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
        self.statusBar = QtWidgets.QStatusBar(ventanaPrincipal)
        self.statusBar.setObjectName("statusBar")
        ventanaPrincipal.setStatusBar(self.statusBar)

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

    def retranslateUi(self, ventanaPrincipal):
        _translate = QtCore.QCoreApplication.translate
        ventanaPrincipal.setWindowTitle(_translate("ventanaPrincipal", "ventanaPrincipal"))
        self.buttonVentana1.setText(_translate("ventanaPrincipal", "Ventana 1"))
        self.buttonVentana2.setText(_translate("ventanaPrincipal", "Ventana 2"))

第一个子窗口的类

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_subVen1(object):
    def setupUi(self, subVen1):
        subVen1.setObjectName("subVen1")
        subVen1.resize(320, 347)
        self.label = QtWidgets.QLabel(subVen1)
        self.label.setGeometry(QtCore.QRect(40, 20, 141, 17))
        self.label.setObjectName("label")
        self.listWidget = QtWidgets.QListWidget(subVen1)
        self.listWidget.setGeometry(QtCore.QRect(20, 60, 256, 192))
        self.listWidget.setObjectName("listWidget")

        self.retranslateUi(subVen1)
        QtCore.QMetaObject.connectSlotsByName(subVen1)

    def retranslateUi(self, subVen1):
        _translate = QtCore.QCoreApplication.translate
        subVen1.setWindowTitle(_translate("subVen1", "Form"))
        self.label.setText(_translate("subVen1", "MIAU MIAU"))

第二个子窗口的类

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_subVen2(object):
    def setupUi(self, subVen2):
        subVen2.setObjectName("subVen2")
        subVen2.resize(320, 304)
        self.listView = QtWidgets.QListView(subVen2)
        self.listView.setGeometry(QtCore.QRect(40, 60, 256, 192))
        self.listView.setObjectName("listView")
        self.label = QtWidgets.QLabel(subVen2)
        self.label.setGeometry(QtCore.QRect(80, 20, 121, 17))
        self.label.setObjectName("label")

        self.retranslateUi(subVen2)
        QtCore.QMetaObject.connectSlotsByName(subVen2)

    def retranslateUi(self, subVen2):
        _translate = QtCore.QCoreApplication.translate
        subVen2.setWindowTitle(_translate("subVen2", "Form"))
        self.label.setText(_translate("subVen2", "Guau Guau"))

调用其他三个的文件.

import sys
#import classes-----------------------
from HMIs.ventanaprincipal import Ui_ventanaPrincipal, QtWidgets
from HMIs.subventana1 import Ui_subVen1
from HMIs.subventana2 import Ui_subVen2
# hijaSub1 inherits the first child window class made by the QtDesigner
#override child closeEvent
class hijaSub1(Ui_subVen1):
   def closeEvent(self, event):
      print("X is clicked")


class multiVen(QtWidgets.QMainWindow):
    def __init__(self,parent=None):
        QtWidgets.QWidget.__init__(self,parent=None)
        self.ui =Ui_ventanaPrincipal()
        self.ui.setupUi(self)
        self.subV1=QtWidgets.QWidget()
        self.subV2=QtWidgets.QWidget()
        #Conect signals whith slots--------------------
        self.ui.buttonVentana1.clicked.connect(self.muestraVentana1)
        self.ui.buttonVentana2.clicked.connect(self.muestraVentana2)
    # slots-----------------------------------------
    def muestraVentana1(self):
        self.wid1=hijaSub1()
        self.wid1.setupUi(self.subV1)
        self.subV1.show() 

    def muestraVentana2(self):
        self.wid2=Ui_subVen2()
        self.wid2.setupUi(self.subV2)
        self.subV2.show()
#Close all windows whith X button of main window
#override main closeEvent        
    def closeEvent(self, event):
        self.subV1.close()
        self.subV2.close()
        event.accept()


if __name__=="__main__":
    app=0
    app=QtWidgets.QApplication(sys.argv)
    myapp=multiVen()
    myapp.show()
    sys.exit(app.exec_())

推荐答案

closeEvent 方法有继承自 QWidget 的类，在这种情况下子类 Sub1，Ui_subVen1, Ui_subVen2 继承自对象，而非QWidget.

The closeEvent method has the classes that inherit from QWidget, in which case the daughter classes Sub1, Ui_subVen1, Ui_subVen2 inherit from object, not from QWidget.

如果你想在windows中实现closeEvent，创建一个使用窗口视图(Ui_xxx)并继承自QWidget的类.

If you want to implement closeEvent in windows, create a class that uses the window view (Ui_xxx) and inherits from QWidget.

class hijaSub1(QtWidgets.QWidget, Ui_subVen1):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent=parent)
        self.setupUi(self)

    def closeEvent(self, event):
        print("X is clicked: hijaSub1")

class hijaSub2(QtWidgets.QWidget, Ui_subVen2):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent=parent)
        self.setupUi(self)

    def closeEvent(self, event):
        print("X is clicked: hijaSub2")

class multiVen(QtWidgets.QMainWindow):
    def __init__(self,parent=None):
        QtWidgets.QWidget.__init__(self,parent=None)
        self.ui =Ui_ventanaPrincipal()
        self.ui.setupUi(self)
        self.subV1=hijaSub1()
        self.subV2=hijaSub2()
        #Conect signals whith slots--------------------
        self.ui.buttonVentana1.clicked.connect(self.muestraVentana1)
        self.ui.buttonVentana2.clicked.connect(self.muestraVentana2)
    # slots-----------------------------------------
    def muestraVentana1(self):
        self.subV1.show() 

    def muestraVentana2(self):
        self.subV2.show()
#Close all windows whith X button of main window
#override main closeEvent        
    def closeEvent(self, event):
        self.subV1.close()
        self.subV2.close()
        event.accept()


if __name__=="__main__":
    import sys
    app=0
    app=QtWidgets.QApplication(sys.argv)
    myapp=multiVen()
    myapp.show()
    sys.exit(app.exec_())

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