Using multiple Windows PyQt5

Starstriker

Hello Guys,
I'm working hard on my project.
I've got some issues...I'm trying to open 3 windows via push buttons.
It is no problem to change from Window 1 to Window 2, but it's not possible to open the third window via push botton. But it is possible to start with the second window and switch via push button to the third window.
Maybe someone can help me.

erstesFenster.py :

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

# Form implementation generated from reading ui file 'ersteFenster.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QTimer, QDate, Qt
import time


class Ui_StartFenster(object):

    def openWindow2(self):
        from zweitesFenster import Ui_Rotortypauswaehlen
        self.window2 = QtWidgets.QDialog()
        self.ui = Ui_Rotortypauswaehlen()
        self.ui.setupUi(self.window2)
        StartFenster.hide()
        self.window2.show()

    def setupUi(self, StartFenster):
        StartFenster.setObjectName("StartFenster")
        StartFenster.resize(790, 435)
        self.centralwidget = QtWidgets.QWidget(StartFenster)
        self.centralwidget.setObjectName("centralwidget")

        self.buttonstart = QtWidgets.QPushButton(self.centralwidget)
        self.buttonstart.setGeometry(QtCore.QRect(240, 300, 99, 30))
        self.buttonstart.setObjectName("buttonstart")
        self.buttonstart.clicked.connect(self.openWindow2)

        self.buttonabbruch = QtWidgets.QPushButton(self.centralwidget)
        self.buttonabbruch.setGeometry(QtCore.QRect(400, 300, 99, 30))
        self.buttonabbruch.setObjectName("buttonabbruch")

        self.label_xfenster = QtWidgets.QLabel(self.centralwidget)
        self.label_xfenster.setGeometry(QtCore.QRect(10, -20, 731, 331))
        self.label_xfenster.setStyleSheet("image: url(:/newPrefix/Download.png);")
        self.label_xfenster.setObjectName("label_xfenster")

        self.label_copyrights = QtWidgets.QLabel(self.centralwidget)
        self.label_copyrights.setGeometry(QtCore.QRect(10, 350, 171, 22))
        self.label_copyrights.setTextFormat(QtCore.Qt.RichText)
        self.label_copyrights.setObjectName("label_copyrights")

        self.dateTimeEdit = QtWidgets.QDateTimeEdit(self.centralwidget)
        self.dateTimeEdit.setGeometry(QtCore.QRect(600, 350, 194, 32))
        self.dateTimeEdit.setObjectName("dateTimeEdit")

        StartFenster.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(StartFenster)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 790, 28))
        self.menubar.setObjectName("menubar")
        StartFenster.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(StartFenster)
        self.statusbar.setObjectName("statusbar")
        StartFenster.setStatusBar(self.statusbar)

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

    def retranslateUi(self, StartFenster):
        _translate = QtCore.QCoreApplication.translate
        StartFenster.setWindowTitle(_translate("StartFenster", "Rotor-Heizprozess"))
        self.buttonstart.setText(_translate("StartFenster", "Los geht\'s!"))
        self.buttonabbruch.setText(_translate("StartFenster", "Abbrechen"))
        self.label_siemensfenster.setText(_translate("StartFenster", "<html><head/><body><p><br/></p></body></html>"))
        self.label_copyrights.setText(_translate("StartFenster", "<html><head/><body><p><span style=\" font-size:10pt; font-style:italic; text-decoration: underline;\">Copyright Horstmann, Weidner</span></p></body></html>"))

import source

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    StartFenster = QtWidgets.QMainWindow()
    ui = Ui_StartFenster()
    ui.setupUi(StartFenster)
    StartFenster.show()
    sys.exit(app.exec_())

zweitesFenster.py :

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

# Form implementation generated from reading ui file 'zweitesFenster.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Rotortypauswaehlen(object):

    def openWindow3(self):
        from drittesFenster import Ui_Dialog
        self.window3 = QtWidgets.QDialog()
        self.ui = Ui_Dialog()
        self.ui.setupUi(self.window3)
        Rotortypauswaehlen.hide()
        self.window3.show()

    def setupUi(self, Rotortypauswaehlen):
        Rotortypauswaehlen.setObjectName("Rotortypauswaehlen")
        Rotortypauswaehlen.resize(790, 435)

        self.label = QtWidgets.QLabel(Rotortypauswaehlen)
        self.label.setGeometry(QtCore.QRect(10, 210, 211, 22))
        self.label.setObjectName("label")
        self.label_copyrights = QtWidgets.QLabel(Rotortypauswaehlen)
        self.label_copyrights.setGeometry(QtCore.QRect(10, 400, 171, 22))
        self.label_copyrights.setTextFormat(QtCore.Qt.RichText)
        self.label_copyrights.setObjectName("label_copyrights")

        self.start = QtWidgets.QPushButton(Rotortypauswaehlen)
        self.start.setGeometry(QtCore.QRect(231, 331, 99, 30))
        self.start.setObjectName("start")
        self.start.clicked.connect(self.openWindow3)

        self.abbrechen = QtWidgets.QPushButton(Rotortypauswaehlen)
        self.abbrechen.setGeometry(QtCore.QRect(380, 330, 99, 30))
        self.abbrechen.setObjectName("abbrechen")

        self.dateTimeEdit = QtWidgets.QDateTimeEdit(Rotortypauswaehlen)
        self.dateTimeEdit.setGeometry(QtCore.QRect(580, 390, 194, 32))
        self.dateTimeEdit.setObjectName("dateTimeEdit")

        self.widget = QtWidgets.QWidget(Rotortypauswaehlen)
        self.widget.setGeometry(QtCore.QRect(230, 140, 143, 161))
        self.widget.setObjectName("widget")

        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")

        self.radioButton = QtWidgets.QRadioButton(self.widget)
        self.radioButton.setObjectName("radioButton")
        self.verticalLayout.addWidget(self.radioButton)
        self.radioButton_2 = QtWidgets.QRadioButton(self.widget)
        self.radioButton_2.setObjectName("radioButton_2")
        self.verticalLayout.addWidget(self.radioButton_2)
        self.radioButton_3 = QtWidgets.QRadioButton(self.widget)
        self.radioButton_3.setObjectName("radioButton_3")
        self.verticalLayout.addWidget(self.radioButton_3)
        self.radioButton_4 = QtWidgets.QRadioButton(self.widget)
        self.radioButton_4.setObjectName("radioButton_4")
        self.verticalLayout.addWidget(self.radioButton_4)
        self.radioButton_5 = QtWidgets.QRadioButton(self.widget)
        self.radioButton_5.setObjectName("radioButton_5")
        self.verticalLayout.addWidget(self.radioButton_5)

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

    def retranslateUi(self, Rotortypauswaehlen):
        _translate = QtCore.QCoreApplication.translate
        Rotortypauswaehlen.setWindowTitle(_translate("Rotortypauswaehlen", "Rotor-Heizprozess"))
        self.label.setText(_translate("Rotortypauswaehlen", "<html><head/><body><p align=\"center\"><span style=\" font-weight:600; text-decoration: underline;\">Bitte Rotortyp auswählen:</span></p></body></html>"))
        self.label_copyrights.setText(_translate("Rotortypauswaehlen", "<html><head/><body><p><span style=\" font-size:10pt; font-style:italic;\">Copyright Horstmann, Weidner</span></p></body></html>"))
        self.start.setText(_translate("Rotortypauswaehlen", "Start!"))
        self.abbrechen.setText(_translate("Rotortypauswaehlen", "Abbruch!"))
        self.radioButton.setText(_translate("Rotortypauswaehlen", "S4R3"))
        self.radioButton_2.setText(_translate("Rotortypauswaehlen", "TLRI 115-36"))
        self.radioButton_3.setText(_translate("Rotortypauswaehlen", "S4R4"))
        self.radioButton_4.setText(_translate("Rotortypauswaehlen", "Essenernudeln"))
        self.radioButton_5.setText(_translate("Rotortypauswaehlen", "heutefreisaufen"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Rotortypauswaehlen = QtWidgets.QDialog()
    ui = Ui_Rotortypauswaehlen()
    ui.setupUi(Rotortypauswaehlen)
    Rotortypauswaehlen.show()
    sys.exit(app.exec_())

drittesFenster.py :

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

# Form implementation generated from reading ui file 'drittesFenster.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from Tempauslesen_Test import Temperatur1



class Ui_Dialog(object):

    def openWindow4(self):
        from viertesFenster import Ui_Dialog
        self.window4 = QtWidgets.QDialog()
        self.ui = Ui_Dialog()
        self.ui.setupUi(self.window4)
        Dialog.hide()
        self.window4.show()

    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(790, 435)
        self.lcdNumber = QtWidgets.QLCDNumber(Dialog)
        self.lcdNumber.setGeometry(QtCore.QRect(620, 50, 64, 23))
        self.lcdNumber.setObjectName("lcdNumber")
        self.lcdNumber_2 = QtWidgets.QLCDNumber(Dialog)
        self.lcdNumber_2.setGeometry(QtCore.QRect(620, 90, 64, 23))
        self.lcdNumber_2.setObjectName("lcdNumber_2")
        self.label_9 = QtWidgets.QLabel(Dialog)
        self.label_9.setGeometry(QtCore.QRect(520, 50, 68, 22))
        self.label_9.setObjectName("label_9")
        self.label_10 = QtWidgets.QLabel(Dialog)
        self.label_10.setGeometry(QtCore.QRect(520, 90, 71, 22))
        self.label_10.setObjectName("label_10")
        self.timeEdit = QtWidgets.QTimeEdit(Dialog)
        self.timeEdit.setGeometry(QtCore.QRect(620, 130, 118, 32))
        self.timeEdit.setObjectName("timeEdit")
        self.label_11 = QtWidgets.QLabel(Dialog)
        self.label_11.setGeometry(QtCore.QRect(520, 140, 68, 22))
        self.label_11.setObjectName("label_11")
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(540, 220, 171, 131))
        self.pushButton.setObjectName("pushButton")
        self.pushButton.clicked.connect(self.openWindow4)
        self.label_copyrights = QtWidgets.QLabel(Dialog)
        self.label_copyrights.setGeometry(QtCore.QRect(620, 400, 171, 22))
        self.label_copyrights.setTextFormat(QtCore.Qt.RichText)
        self.label_copyrights.setObjectName("label_copyrights")
        self.widget = QtWidgets.QWidget(Dialog)
        self.widget.setGeometry(QtCore.QRect(100, 10, 361, 421))
        self.widget.setObjectName("widget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")

        self.progressBar_1 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_1.setProperty("value", 24)
        self.progressBar_1.setObjectName("progressBar_1")
        self.progressBar_1.setMaximum(300)
        self.verticalLayout.addWidget(self.progressBar_1)

        self.progressBar_2 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_2.setProperty("value", 24)
        self.progressBar_2.setObjectName("progressBar_2")
        self.verticalLayout.addWidget(self.progressBar_2)

        self.progressBar_3 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_3.setProperty("value", 24)
        self.progressBar_3.setObjectName("progressBar_3")
        self.verticalLayout.addWidget(self.progressBar_3)
        
        self.progressBar_4 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_4.setProperty("value", 24)
        self.progressBar_4.setObjectName("progressBar_4")
        self.verticalLayout.addWidget(self.progressBar_4)
        
        self.progressBar_5 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_5.setProperty("value", 24)
        self.progressBar_5.setObjectName("progressBar_5")
        self.verticalLayout.addWidget(self.progressBar_5)
        self.progressBar_6 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_6.setProperty("value", 24)
        self.progressBar_6.setObjectName("progressBar_6")
        self.verticalLayout.addWidget(self.progressBar_6)
        self.progressBar_7 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_7.setProperty("value", 24)
        self.progressBar_7.setObjectName("progressBar_7")
        self.verticalLayout.addWidget(self.progressBar_7)
        self.progressBar_8 = QtWidgets.QProgressBar(self.widget)
        self.progressBar_8.setProperty("value", 24)
        self.progressBar_8.setObjectName("progressBar_8")
        self.verticalLayout.addWidget(self.progressBar_8)
        self.widget1 = QtWidgets.QWidget(Dialog)
        self.widget1.setGeometry(QtCore.QRect(10, 20, 70, 401))
        self.widget1.setObjectName("widget1")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.widget1)
        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.label_1 = QtWidgets.QLabel(self.widget1)
        self.label_1.setObjectName("label_1")
        self.verticalLayout_2.addWidget(self.label_1)
        self.label_2 = QtWidgets.QLabel(self.widget1)
        self.label_2.setObjectName("label_2")
        self.verticalLayout_2.addWidget(self.label_2)
        self.label_3 = QtWidgets.QLabel(self.widget1)
        self.label_3.setObjectName("label_3")
        self.verticalLayout_2.addWidget(self.label_3)
        self.label_4 = QtWidgets.QLabel(self.widget1)
        self.label_4.setObjectName("label_4")
        self.verticalLayout_2.addWidget(self.label_4)
        self.label_5 = QtWidgets.QLabel(self.widget1)
        self.label_5.setObjectName("label_5")
        self.verticalLayout_2.addWidget(self.label_5)
        self.label_6 = QtWidgets.QLabel(self.widget1)
        self.label_6.setObjectName("label_6")
        self.verticalLayout_2.addWidget(self.label_6)
        self.label_7 = QtWidgets.QLabel(self.widget1)
        self.label_7.setObjectName("label_7")
        self.verticalLayout_2.addWidget(self.label_7)
        self.label_8 = QtWidgets.QLabel(self.widget1)
        self.label_8.setObjectName("label_8")
        self.verticalLayout_2.addWidget(self.label_8)

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

        self.timer = QTimer()
        self.timer.timeout.connect(self.update_temperature)
        self.timer.start(1)

    def update_temperature(self):
        temperature = Temperatur1()
        if temperature < 500:
            self.progressBar_1.setValue(temperature)
        else:
            self.timer.stop()

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Rotor-Heizprozess"))
        self.label_9.setText(_translate("Dialog", "Strom"))
        self.label_10.setText(_translate("Dialog", "Spannung"))
        self.label_11.setText(_translate("Dialog", "Laufzeit:"))
        self.pushButton.setText(_translate("Dialog", "Abbruch!!"))
        self.label_copyrights.setText(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:10pt; font-style:italic;\">Copyright Horstmann, Weidner</span></p></body></html>"))
        self.progressBar_1.setWhatsThis(_translate("Dialog", "<html><head/><body><p><br/></p></body></html>"))
        self.label_1.setText(_translate("Dialog", "Thermo1"))
        self.label_2.setText(_translate("Dialog", "Thermo2"))
        self.label_3.setText(_translate("Dialog", "Thermo3"))
        self.label_4.setText(_translate("Dialog", "Thermo4"))
        self.label_5.setText(_translate("Dialog", "Thermo5"))
        self.label_6.setText(_translate("Dialog", "Thermo6"))
        self.label_7.setText(_translate("Dialog", "Thermo7"))
        self.label_8.setText(_translate("Dialog", "Thermo8"))
        self.progressBar_1.setFormat(_translate("MainWindow", '%v°C'))


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

Traceback (most recent call last):
File "/home/pi/Desktop/Testphase/neueGui2in1/zweitesFenster.py", line 19, in openWindow3
Rotortypauswaehlen.close()
NameError: global name 'Rotortypauswaehlen' is not defined
Aborted

This is the error, after clicking on pushbutton in window 2

JonB

@Starstriker
That seems like an awful lot of code to post for a question.

jsulm

@Starstriker

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Rotortypauswaehlen(object):

    def openWindow3(self):
        from drittesFenster import Ui_Dialog
        self.window3 = QtWidgets.QDialog()
        self.ui = Ui_Dialog()
        self.ui.setupUi(self.window3)
        Rotortypauswaehlen.hide()
        self.window3.show()

Rotortypauswaehlen does not exist inside openWindow3, so how is it supposed to work?
You would need to store it in a member variable when it is passed to setupUi and then use that variable.

Just a note: your naming convention is irritating. Usually parameter names start with lower case letter and class names with upper case letter.

JonB

@jsulm , @Starstriker
Just wanted to say that, contrary to what @Denni-0 has posted, the naming conventions suggested by @jsulm would indeed be a good improvement in your coding style, and are recognised by most programmers. I too found your code difficult to absorb because of the capitalization. It is not true that @jsulm "just need to learn to adapt better", nor would I suggest that he "must not have worked with much post production code".

We have had this disagreement on this forum before, so there is little point in re-rehearsing the arguments. Suffice to say that you will find a large number of programmers out there who would agree with @jsulm's recommendation.