How do I show a subwindow in a MDI area? - python

So am testing a bit with MDI area, the problem is that when I try to Open a Subwindow inside the MDI this happens.
Any way to make the Little Subwindow bigger enough to be readble?
Am doing Everything inside an only test file.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(488, 392)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_3.setGeometry(QtCore.QRect(280, 290, 91, 51))
self.pushButton_3.setObjectName("pushButton_3")
self.pushButton_3.clicked.connect(self.Open)
self.mdiArea = QtWidgets.QMdiArea(self.centralwidget)
self.mdiArea.setGeometry(QtCore.QRect(60, 20, 261, 211))
self.mdiArea.setObjectName("mdiArea")
self.subwindow = QtWidgets.QWidget()
self.subwindow.setObjectName("subwindow")
self.pushButton = QtWidgets.QPushButton(self.subwindow)
self.pushButton.setGeometry(QtCore.QRect(100, 80, 56, 17))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 488, 18))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def Open(self):
self.mdiArea.addSubWindow(self.subwindow)
self.subwindow.show()
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton_3.setText(_translate("MainWindow", "Open"))
self.subwindow.setWindowTitle(_translate("MainWindow", "Subwindow"))
self.pushButton.setText(_translate("MainWindow", "YAY!"))
class mywindow(QtWidgets.QMainWindow):
def __init__(self):
super(mywindow, self).__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
app = QtWidgets.QApplication([])
application = mywindow()
application.show()
app.exec()


You have to resize the QMdiSubWindow:
def Open(self):
sw = self.mdiArea.addSubWindow(self.subwindow)
self.subwindow.show()
sw.resize(640, 480)

Related

setSizeHint() not working for changing the height of QListWidgetItem in QListWidget

Here is my code for changing the item height of items in list
ui.symbolsList.insertItem(ui.symbolsList.count(), ui.addSymbolText.text())
count = ui.symbolsList.count()
for i in range(count):
item = ui.symbolsList.item(i)
item.setSizeHint(QSize(item.sizeHint().width(), 60))
This is not changing the height of items in QListWidget. I also tried creating the item first with custom height and then adding that item to the list.
What else do I need to do?
Following is the working code:
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QSize
class Ui_MainWindow(object):
def submit(self):
self.listWidget.insertItem(self.listWidget.count(), self.lineEdit.text())
count = self.listWidget.count()
for i in range(count):
item = self.listWidget.item(i)
item.setSizeHint(QSize(item.sizeHint().width(), 60))
self.lineEdit.setText("")
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.listWidget = QtWidgets.QListWidget(self.centralwidget)
self.listWidget.setGeometry(QtCore.QRect(170, 110, 256, 192))
self.listWidget.setObjectName("listWidget")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(170, 70, 113, 20))
self.lineEdit.setObjectName("lineEdit")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(300, 70, 75, 23))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.pushButton.clicked.connect(self.submit)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

The problem is that the default sizeHint() is QSize(-1, -1) which is invalid so when creating a new QSize with width -1 makes it invalid causing it not to be used when painting the item. The solution is not to use the width of the default sizeHint() but to set the width to 0:
item.setSizeHint(QSize(0, 60))

Msg_box after clicking button in PyQT

I want to get MsgBox after button click. I try to use PyQt5 for it. I make windows form with one button:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(320, 330, 251, 51))
self.pushButton.setObjectName("PushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Then I try to enter button clicked function:
def buttonClicked(self):
msg = QMessageBox()
msg.setText("This is a message box")
But it doesn't work at all. How should I spent my problem?

Try it:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(320, 330, 251, 51))
self.pushButton.setObjectName("PushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
super().__init__()
self.setupUi(self)
self.pushButton.clicked.connect(self.buttonClicked) # +++
def buttonClicked(self):
msg = QtWidgets.QMessageBox.information(
self,
'Information',
'This is a message box')
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())

You have done well to create the QMessageBox but not shown them, so a possible solution is to use the exec_() method:
def buttonClicked(self):
msg = QMessageBox()
msg.setText("This is a message box")
msg.exec_()

I'm trying to make my PyQt GUI code in OOP way

I'm trying to make my PyQt5 GUI in OOP way for example class for window and another for Pushbutton I'm really confiuse how to make it.Here is my code and my try to make pushbutton class.also my goal is to make classes for each of the items in the window
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
#making Pushbutton
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 210, 93, 28))
self.pushButton.setStyleSheet("QPushButton::setCheckable(bool)")
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
# here I'm trying to make Buttom class
class Button(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Button, self).__init__(parent)
# Main function
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

from Subclassing of QPushButton :
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sat Jun 6 16:21:24 2020
#author: Pietro
"""
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
#making Pushbutton
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 210, 93, 28))
self.pushButton.setStyleSheet("QPushButton::setCheckable(bool)")
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
self.pippo=CustomButtonClass(self.centralwidget)
self.pippo.show()
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
# here I'm trying to make Buttom class
class CustomButtonClass(QtWidgets.QPushButton):
def __init__(self, *args, **kwargs):
QtWidgets.QPushButton.__init__(self,*args, **kwargs)
self.setGeometry(QtCore.QRect(280, 310, 93, 28))
self.setText('customized')
self.hide()
self.setStyleSheet("QPushButton{\n"
" background-color: #9de650;\n"
"}\n"
"\n"
"\n"
"QPushButton:hover{\n"
" background-color: green;\n"
"}\n"
"\n"
"")
# Main function
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

How to connect 3 different programs in one main file using pyqt5?

I have 3 programs here, and I have a problem in running those 3 programs because I want it to be all imported to the main file and connected to each other after clicking the buttons on each window. My problem here is that after I have reached the 2nd window, when I click the button there then it doesn't proceed to the last window but instead the window crashes. What would I change in my program so that it will not crash?
s1.py (main program)
from PyQt5 import QtCore, QtGui, QtWidgets
from s4 import *
from s3 import *
class Ui_MainWindow(object):
def ok (self):
self.window=QtWidgets.QMainWindow()
self.ui=Ui_MainWindow2()
self.ui.setup(self.window)
self.window.show()
MainWindow.hide()
def proceed (self):
self.window1=QtWidgets.QMainWindow()
self.ui1=Ui_MainWindow3()
self.ui1.setup1(self.window1)
self.window1.show()
MainWindow2.hide()
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(330, 220, 93, 28))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.ok)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "ok"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
s4.py (2nd program)
from PyQt5 import QtCore, QtGui, QtWidgets
from s3 import *
class Ui_MainWindow2(object):
def proceed (self):
self.window1=QtWidgets.QMainWindow()
self.ui1=Ui_MainWindow3()
self.ui1.setup1(self.window1)
self.window1.show()
MainWindow2.hide()
def setup(self, MainWindow2):
MainWindow2.setObjectName("MainWindow2")
MainWindow2.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow2)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(320, 270, 93, 28))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.proceed)
MainWindow2.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow2)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow2.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow2)
self.statusbar.setObjectName("statusbar")
MainWindow2.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow2)
QtCore.QMetaObject.connectSlotsByName(MainWindow2)
def retranslateUi(self, MainWindow2):
_translate = QtCore.QCoreApplication.translate
MainWindow2.setWindowTitle(_translate("MainWindow2", "MainWindow"))
self.pushButton.setText(_translate("MainWindow2", "PROCEED"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow2 = QtWidgets.QMainWindow()
ui = Ui_MainWindow2()
ui.setup(MainWindow2)
MainWindow2.show()
sys.exit(app.exec_())
s3.py(3rd program)
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow3(object):
def setup1(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(260, 190, 451, 181))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName("label")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "THIS IS MY LAST WINDOW"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow3()
ui.setup1(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

from PyQt5 import QtCore, QtGui, QtWidgets
from s4 import Ui_MainWindow2
class Ui_MainWindow(object):
def ok (self):
self.window=QtWidgets.QMainWindow()
self.ui=Ui_MainWindow2()
self.ui.setup(self.window)
self.window.show()
MainWindow.hide()
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(330, 220, 93, 28))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
self.pushButton.clicked.connect(self.ok)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "ok"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
and import Ui_MainWindow3 from s3.py into s4 file and call proceed function as well as:
from s3 import Ui_MainWindow3

in PyQt moving between screen when pressing a button

I'm building restaurant app for practice with PyQt5 i have 2 problems:
I have a main screen that will take the user to other screens
when changing between screens in the second time i get error and it crash
The previous window won't close when i'm moving to the new window so every time it's new window
I tried searching for information about it and all i can find is how to do things in the same screen not in a new screen
Code for you to see yourself:
first screen:
from mainMenu import*
from PyQt5 import QtCore, QtGui, QtWidgets
mod=0#0 - TA , 1- Delivery
class Ui_Main():
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(1072, 747)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.ta = QtWidgets.QPushButton(self.centralwidget)
self.ta.setGeometry(QtCore.QRect(680, 50, 191, 171))
self.ta.setObjectName("ta")
self.ta.clicked.connect(self.taClicked)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1072, 22))
self.menubar.setObjectName("menubar")
self.menuMain = QtWidgets.QMenu(self.menubar)
self.menuMain.setObjectName("menuMain")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.menubar.addAction(self.menuMain.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow",
"MainWindow"))
self.ta.setText(_translate("MainWindow", "TA"))
self.menuMain.setTitle(_translate("MainWindow", "Main"))
def taClicked(self):
mod=0
print("here")
self.window = QtWidgets.QMainWindow()
self.ui = Ui_MainMenu() # ------------->creating an object
self.ui.setupUi(self.window)
self.window.show()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_Main()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Second screen:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from main import*
class Ui_MainMenu(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(1073, 738)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
self.graphicsView.setGeometry(QtCore.QRect(685, 40, 331, 251))
self.graphicsView.setObjectName("graphicsView")
self.line = QtWidgets.QFrame(self.centralwidget)
self.line.setGeometry(QtCore.QRect(80, 330, 561, 20))
self.line.setFrameShape(QtWidgets.QFrame.HLine)
self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line.setObjectName("line")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(190, 385, 71, 41))
self.label.setObjectName("label")
self.pushButton_14 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_14.setGeometry(QtCore.QRect(190, 440, 81, 51))
self.pushButton_14.setObjectName("pushButton_14")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(800, 380, 81, 16))
self.label_2.setObjectName("label_2")
self.spinBox = QtWidgets.QSpinBox(self.centralwidget)
self.spinBox.setGeometry(QtCore.QRect(727, 370, 61, 41))
self.spinBox.setObjectName("spinBox")
self.pushButton_40 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_40.setGeometry(QtCore.QRect(750, 600, 141, 41))
self.pushButton_40.setObjectName("pushButton_40")
self.pushButton_40.clicked.connect(self.btnclicked)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1073, 22))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainMenu", "MainMenu"))
self.pushButton_40.setText(_translate("MainWindow", "Cancel"))
def btnclicked(self):
print("here")
self.window = QtWidgets.QMainWindow()
self.m= Ui_Main()
self.m.setupUi(self.window)
self.window.show()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainMenu()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
Error:
Traceback (most recent call last):
File "/Users/adir/PycharmProjects/main.py", line 61, in taClicked
self.ui = Ui_MainMenu() # ------------->creating an object
NameError: name 'Ui_MainMenu' is not defined

Try it:
#from mainMenu import*
from PyQt5 import QtCore, QtGui, QtWidgets
mod = 0 #0 - TA , 1- Delivery
class Ui_MainMenu(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(1073, 738)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
self.graphicsView.setGeometry(QtCore.QRect(685, 40, 331, 251))
self.graphicsView.setObjectName("graphicsView")
self.line = QtWidgets.QFrame(self.centralwidget)
self.line.setGeometry(QtCore.QRect(80, 330, 561, 20))
self.line.setFrameShape(QtWidgets.QFrame.HLine)
self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
self.line.setObjectName("line")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(190, 385, 71, 41))
self.label.setObjectName("label")
self.pushButton_14 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_14.setGeometry(QtCore.QRect(190, 440, 81, 51))
self.pushButton_14.setObjectName("pushButton_14")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(800, 380, 81, 16))
self.label_2.setObjectName("label_2")
self.spinBox = QtWidgets.QSpinBox(self.centralwidget)
self.spinBox.setGeometry(QtCore.QRect(727, 370, 61, 41))
self.spinBox.setObjectName("spinBox")
self.pushButton_40 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_40.setGeometry(QtCore.QRect(750, 600, 141, 41))
self.pushButton_40.setObjectName("pushButton_40")
# self.pushButton_40.clicked.connect(self.btnclicked)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1073, 22))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainMenu", "MainMenu"))
self.pushButton_40.setText(_translate("MainWindow", "Cancel"))
class Ui_Main():
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(1072, 747)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.ta = QtWidgets.QPushButton(self.centralwidget)
self.ta.setGeometry(QtCore.QRect(680, 50, 191, 171))
self.ta.setObjectName("ta")
# self.ta.clicked.connect(self.taClicked)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1072, 22))
self.menubar.setObjectName("menubar")
self.menuMain = QtWidgets.QMenu(self.menubar)
self.menuMain.setObjectName("menuMain")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.menubar.addAction(self.menuMain.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow",
"MainWindow"))
self.ta.setText(_translate("MainWindow", "TA"))
self.menuMain.setTitle(_translate("MainWindow", "Main"))
class MainWindow(QtWidgets.QMainWindow, Ui_Main):
def __init__(self):
super().__init__()
self.setupUi(self)
self.ta.clicked.connect(self.taClicked)
def taClicked(self):
mod = 0
print("here")
self.window = QtWidgets.QMainWindow()
self.mainMenu = Ui_MainMenu() # ------------->creating an object
self.mainMenu.setupUi(self.window)
self.mainMenu.pushButton_40.clicked.connect(self.btnclicked)
self.window.show()
self.hide()
def btnclicked(self):
self.window.hide()
self.show()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
# MainWindow = QtWidgets.QMainWindow()
# ui = Ui_Main()
# ui.setupUi(MainWindow)
# MainWindow.show()
mainWindow = MainWindow()
mainWindow.show()
sys.exit(app.exec_())

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