Button click doesnt work from my second class/layout in Python

Question

I am using PyQt5 and I have designed 3 layouts.

• Login
• Dashboard
• Settings.

Login and Dashboard pages have individual class files. When I am trying to login, it gets logged in. After that, I am trying to click the settings button from my dashboard, but nothing happens. The layout doesnt change.

Whereas, if I individually run the dashboard file, clicking on the settings button works and the layout changes. I am like confused, why this is happening. Here is a piece of my code:

login:

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from login import Ui_loginWindow
from dashboard import Ui_dashboardWindow

class loginClass(Ui_loginWindow):
    def __init__(self,dialog):
        Ui_loginWindow.__init__(self)
        self.setupUi(dialog)
        self.loginBtn.clicked.connect(self.openDashboard)

    def openDashboard(self):
        self.dashboardWindow = Ui_dashboardWindow()
        self.dashboardWindow.setupUi(loginWindow)
        loginWindow.hide() #works
        loginWindow.show() #works

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    loginWindow = QtWidgets.QMainWindow()
    var = loginClass(loginWindow)
    loginWindow.show()
    sys.exit(app.exec_())

dashboard:

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from dashboard import Ui_dashboardWindow
from settings import Ui_settingsWindow

class dashboardClass(Ui_dashboardWindow):
    def __init__(self,dialog):
        Ui_dashboardWindow.__init__(self)
        self.setupUi(dialog)
        self.settingsBtn.clicked.connect(self.openSettings)

    def openSettings(self):
        self.settingsWindow = Ui_settingsWindow()
        self.settingsWindow.setupUi(dashboardWindow)
        dashboardWindow.hide() #doesnot work
        dashboardWindow.show() #doesnot work

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    dashboardWindow = QtWidgets.QMainWindow()
    var = dashboardClass(dashboardWindow)
    dashboardWindow.show()
    sys.exit(app.exec_())

what i actually want

Answer 1

while excuting:

self.dashboardWindow = Ui_dashboardWindow()
self.dashboardWindow.setupUi()

you are sciping your custom-class init, where you connect the buttons click -signal - simply use:

self.dashboardWindow = dashboardClass()

or add the connect manually:

self.dashboardWindow = Ui_dashboardWindow()
self.dashboardWindow.setupUi()
self.dashboardWindow.settingsBtn.clicked.connect(openDashboard)

follow all this with:

self.dashboardWindow.show()
self.hide()

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_{Please note that your naming is very confusing and I can't follow why your open DASHBOARD hides ands shows your SETTINGS and the other way around. You probably will have some issue there too, but I hope this will address your button-click-problem.}

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EDIT:

Here is a simple working example with three Windows called inside each other (restructured):

from PyQt5.QtWidgets import *
class LoginWindow( QMainWindow ) :
    def __init__ ( self, parent = None ) :
        super( LoginWindow, self ).__init__( parent )
        self.text = QLineEdit( 'user/password', self )
        self.loginBtn = QPushButton( 'login; dashboard', self )
        self.loginBtn.move( 0, 50 )
        self.loginBtn.clicked.connect( self.openDashboard )

    def openDashboard ( self ) :
        self.dashboard = DashboardWindow( self )
        self.dashboard.show()
        #self.hide()  # optional

class DashboardWindow( QMainWindow ) :
    def __init__ ( self, parent = None ) :
        super( DashboardWindow, self ).__init__( parent )
        self.settingsBtn = QPushButton( "open settings", self )
        self.settingsBtn.clicked.connect( self.openSettings )

    def openSettings ( self ) :
        self.settings = SettingWindow( self )
        self.settings.show()
        #self.hide()  # optional

class SettingWindow( QMainWindow ) :
    def __init__ ( self, parent = None ) :
        super( SettingWindow, self ).__init__( parent )
        self.label = QLabel( 'hi :)\nsettings here', self )

where the LoginWindow-class is simply called in the main:

import sys
if __name__ == "__main__" :
    app = QApplication( sys.argv )
    login = LoginWindow()
    login.show()
    sys.exit( app.exec_() )

if your using the hide-option, you can reshow the previous window by adding something like this (example for inside SettingWindow-class):

def closeEvent ( self, *args, **kwargs ) :
    self.parent().show()
    super( SettingWindow, self ).closeEvent( *args, **kwargs )

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Finally, for a solution without switching the windows, using just one, have a look at my answer in:
Switching between frames without erasing contents of each frame