PyQT 中的多对话框程序不会关闭(续集！) [英] Multi-dialog program in PyQT will not close (the sequel!)

问题描述

我有另一个 PyQT 问题，这次我有一个更有用的例子，因为它包含我的部分代码(当然是去角化的！)我很难弄清楚如何关闭程序选择"对话框窗口仅使用注销"按钮.我可以简单地使用表单上的关闭按钮，但我想使用注销"按钮来完成.

I have another problem with PyQT, this time I have an example that will be far more useful since it contains part of my code (defanged of course!) I have a hard time figuring out how to close the 'PROGRAM SELECT' dialog window by only using the 'LOGOUT' button. I could simply use the close button on the form, but I want to do it with the 'LOGOUT' button.

谁能帮我解决这个难题?

Could anyone help me solve this conundrum?

这里有一些可编译的代码供大家阅读.

Here is some compilable code for you all to chew on.

connectionName = 'example'

class SelectProgramForm(QtGui.QDialog):   
    def __init__(self, connName, connPrivilege):
        QtGui.QWidget.__init__(self)
        self.fooA = connName
        self.fooB = connPrivilege

        self.widgetWidth = 100
        self.formWidth = self.widgetWidth + 40

    def setupUi(self, programSelectForm):
        programSelectForm.setObjectName("programSelectForm")
        programSelectForm.resize(400, self.formWidth)
        self.widget = QtGui.QWidget(programSelectForm)
        self.widget.setGeometry(QtCore.QRect(20, 20, 360, self.widgetWidth))
        self.widget.setObjectName("widget")
        self.verticalLayout = QtGui.QVBoxLayout(self.widget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.instructionLabel = QtGui.QLabel(self.widget)
        self.instructionLabel.setObjectName("instructionLabel")
        self.verticalLayout.addWidget(self.instructionLabel)
        spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
        self.verticalLayout.addItem(spacerItem)
        self.optionsGridLayout = QtGui.QGridLayout()
        self.optionsGridLayout.setObjectName("optionsGridLayout")


        self.verticalLayout.addLayout(self.optionsGridLayout)
        spacerItemUpper = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
        self.verticalLayout.addItem(spacerItemUpper)
        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        spacerItemLower = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItemLower)
        self.pushButtonLogout = QtGui.QPushButton(self.widget)
        self.pushButtonLogout.setObjectName("pushButtonLogout")
        self.horizontalLayout.addWidget(self.pushButtonLogout)
        self.verticalLayout.addLayout(self.horizontalLayout)

        self.connect(self.pushButtonLogout, QtCore.SIGNAL("clicked()"), self.reject)

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


    def retranslateUi(self, programSelectForm):
        programSelectForm.setWindowTitle(QtGui.QApplication.translate("programSelectForm", "Program Select", None, QtGui.QApplication.UnicodeUTF8))
        self.instructionLabel.setText(QtGui.QApplication.translate("programSelectForm", "Select the program that you wish to access:", None, QtGui.QApplication.UnicodeUTF8))
        self.pushButtonLogout.setText(QtGui.QApplication.translate("programSelectForm", "Logout", None, QtGui.QApplication.UnicodeUTF8))


class LoginForm(QtGui.QDialog): 
    def __init__(self, connName):
        self.fooA = connName

    def setupUi(self, LoginForm):
        LoginForm.setObjectName("LoginForm")
        LoginForm.resize(275, 175)
        self.widget = QtGui.QWidget(LoginForm)
        self.widget.setGeometry(QtCore.QRect(10, 10, 251, 147))
        self.widget.setObjectName("widget")
        self.verticalLayout = QtGui.QVBoxLayout(self.widget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.dataInputLayout = QtGui.QHBoxLayout()
        self.dataInputLayout.setObjectName("dataInputLayout")
        self.labelVerticalLayout = QtGui.QVBoxLayout()
        self.labelVerticalLayout.setObjectName("labelVerticalLayout")
        self.userIDLabel = QtGui.QLabel(self.widget)
        self.userIDLabel.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
        self.userIDLabel.setObjectName("userIDLabel")
        self.labelVerticalLayout.addWidget(self.userIDLabel)
        self.passwordLabel = QtGui.QLabel(self.widget)
        self.passwordLabel.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
        self.passwordLabel.setObjectName("passwordLabel")
        self.labelVerticalLayout.addWidget(self.passwordLabel)
        self.dataInputLayout.addLayout(self.labelVerticalLayout)
        self.labelButtonVerticalLayout = QtGui.QVBoxLayout()
        self.labelButtonVerticalLayout.setObjectName("labelButtonVerticalLayout")
        self.userIDLineEdit = QtGui.QLineEdit(self.widget)
        self.userIDLineEdit.setObjectName("userIDLineEdit")
        self.labelButtonVerticalLayout.addWidget(self.userIDLineEdit)
        self.passwordLineEdit = QtGui.QLineEdit(self.widget)
        self.passwordLineEdit.setObjectName("passwordLineEdit")
        self.labelButtonVerticalLayout.addWidget(self.passwordLineEdit)
        self.dataInputLayout.addLayout(self.labelButtonVerticalLayout)
        self.verticalLayout.addLayout(self.dataInputLayout)
        spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
        self.verticalLayout.addItem(spacerItem)
        self.buttonLayout = QtGui.QHBoxLayout()
        self.buttonLayout.setObjectName("buttonLayout")
        self.newUserPushButton = QtGui.QPushButton(self.widget)
        self.newUserPushButton.setObjectName("newUserPushButton")
        self.buttonLayout.addWidget(self.newUserPushButton)
        self.loginPushButton = QtGui.QPushButton(self.widget)
        self.loginPushButton.setObjectName("loginPushButton")
        self.buttonLayout.addWidget(self.loginPushButton)
        self.verticalLayout.addLayout(self.buttonLayout)

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

        QtCore.QObject.connect(self.loginPushButton, QtCore.SIGNAL("clicked()"), self.confirmUser)

    def confirmUser(self):
        programWindow = QtGui.QDialog()
        self.fooA = 'fooA'   # these are needed in real program
        self.fooB = 'fooB'   # these are needed in real program
        programDialog = SelectProgramForm(self.fooA, self.fooB)
        programDialog.setupUi(programWindow)
        programWindow.exec_()

    def retranslateUi(self, LoginForm):
        LoginForm.setWindowTitle(QtGui.QApplication.translate("LoginForm", "Login", None, QtGui.QApplication.UnicodeUTF8))
        self.userIDLabel.setText(QtGui.QApplication.translate("LoginForm", "Username:", None, QtGui.QApplication.UnicodeUTF8))
        self.passwordLabel.setText(QtGui.QApplication.translate("LoginForm", "Password:", None, QtGui.QApplication.UnicodeUTF8))
        self.newUserPushButton.setText(QtGui.QApplication.translate("LoginForm", "New User?", None, QtGui.QApplication.UnicodeUTF8))
        self.loginPushButton.setText(QtGui.QApplication.translate("LoginForm", "Log In", None, QtGui.QApplication.UnicodeUTF8))


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    window = QtGui.QDialog()
    newUser = LoginForm(connectionName)
    newUser.setupUi(window)
    window.show()
    sys.exit(app.exec_())

这是另一个可编译的示例，显示了我正在寻找的内容.每个窗口都可以关闭.请注意，有三个级别的窗口，一个由另一个激活，第二个和第三个窗口上没有关闭图标(又名X"按钮).如果只有此代码可以与其他代码一起使用...

Here is another compilable example that shows what I am looking for. Each window is able to close. Notice that there are three levels of windows, one activated by the other, that there are no close icons (aka 'X' buttons) on the second and third windows. If only this code would work with the other code...

'''
Created on 2010-06-18

@author: dhatt
'''

import sys
from PyQt4 import QtGui, QtCore

class WindowLV3(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        self.setWindowFlags(QtCore.Qt.CustomizeWindowHint|QtCore.Qt.WindowTitleHint|QtCore.Qt.WindowMaximizeButtonHint)
        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV3')

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)

        self.connect(quit, QtCore.SIGNAL('clicked()'),
            self.reject)


class WindowLV2(QtGui.QDialog):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.Window3 = WindowLV3()

        self.setWindowFlags(QtCore.Qt.CustomizeWindowHint|QtCore.Qt.WindowTitleHint|QtCore.Qt.WindowMaximizeButtonHint)
        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV2')

        self.quit = QtGui.QPushButton('Close', self)
        self.quit.setGeometry(10, 10, 60, 35)

        next = QtGui.QPushButton('Lv3', self)
        next.setGeometry(10, 50, 60, 35)

        self.connect(self.quit, QtCore.SIGNAL('clicked()'),
            self.reject)

        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)

    def nextWindow(self):
        self.Window3.show()


class WindowLV1(QtGui.QDialog):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.Window2 = WindowLV2()

        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV1')

        next = QtGui.QPushButton('Lv2', self)
        next.setGeometry(10, 50, 60, 35)

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)

        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)

        self.connect(quit, QtCore.SIGNAL('clicked()'),
             self.reject)
        #QtGui.qApp, QtCore.SLOT('quit()'))

    def nextWindow(self):
        self.Window2.show()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    Window1 = WindowLV1()
    Window1.show()
    sys.exit(app.exec_())

狩猎快乐！

推荐答案

我又来了，我设法草拟了一个答案.

I'm here again, and I managed to scratch up an answer.

我尝试切换档位，并改用 QWizard，但是当即使 QWizard 仍然有一些与我的对话框相同的问题时(运行时错误:底层 C/C++ 对象已被删除)，我又看了一下我的代码，并发现了这一点.

I tried switching gears, and using a QWizard instead, but when even the QWizard still had some of the same issues as my dialogs had (RuntimeError: underlying C/C++ object has been deleted) , I took one more look at my code, and found this out.

我想出了一种最终只使用对话框关闭表单的方法.原来 LoginForm 没有正确设置为 QDialog，因为它实际上是两个对象，窗口和对象本身(这不是真正的 QDialog 对象).

I figured out a way to finally close the forms using just a dialog. Turns out the LoginForm was not setup as a QDialog properly because it is actually two objects, the window and the object iteself (Which is not a true QDialog object).

之前的代码:

# a QDialog inside a LoginForm object (as a QDialog class), if I close this, the 'window' QDialog object is left hanging and raises an error
window = QtGui.QDialog()
newUser = LoginForm(connectionName)
newUser.setupUi(window)
window.show() code here

后面的代码:

# a LoginForm object as a QDialog class.  When closed, nothing is left hanging
window = LoginForm(connectionName)
window.setupUi(window)
window.show()

添加在 LoginForm 类本身中更改几行的工作(即，完全从 LoginForm 类中重构 SetupUI 方法)

Add to that the work of changing several lines in the LoginForm class itself (namely, refactoring the SetupUI method out of the LoginForm class entirely)

并将其添加到类本身(LoginForm 类)

And add this to the class itself (the LoginForm class)

class LoginForm(QtGui.QDialog):
"""
This makes the LoginForm object subclassed from a QDialog object.
"""

def __init__(self, parent, fooA, fooB):
    super(LoginForm, self).__init__(parent)
    # Add whatever code you want afterwards

这可能不是最好的方法，但这是我设法做到的方法，而且我发现我的代码更简洁，没有 QtDesigner 中 SetupUI 为我设置的所有混乱.

This may not be the best way, but it is the way I managed to do it, and I find my code is cleaner without all of that mess that SetupUI set up for me from QtDesigner.

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