Making loops inside PyQt5 - python

I am trying to make a program that has a loop inside of it. I think that the problem is that one the loop starts the program just loops inside of it.
CODE -
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(319, 258)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.checkBox = QtWidgets.QCheckBox(self.centralwidget)
self.checkBox.setGeometry(QtCore.QRect(20, 60, 281, 51))
self.checkBox.setObjectName("checkBox")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 319, 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.checkBox.setText(_translate("MainWindow", "CheckBox"))
self.checkBox.clicked.connect(self.potato)
def potato(self, value):
while self.checkBox.isChecked:
print('potato')
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_())```


Do not modify the code generated by Qt Designer but create another class that inherits
from the appropriate widget and use the initial class to fill it.
The while loop is blocking the interface, use a QTimer or extra thread, signals and slots.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(319, 258)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.checkBox = QtWidgets.QCheckBox(self.centralwidget)
self.checkBox.setGeometry(QtCore.QRect(20, 60, 281, 51))
self.checkBox.setObjectName("checkBox")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 319, 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.checkBox.setText(_translate("MainWindow", "CheckBox"))
class Demo(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
super().__init__()
self.setupUi(self)
self.checkBox.clicked.connect(self.potato)
self.timer = QtCore.QTimer()
self.timer.timeout.connect(self.on_timer)
def potato(self, value):
if value:
self.timer.start(1000)
else:
self.timer.stop()
def on_timer(self):
print('potato')
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Demo()
w.show()
sys.exit(app.exec_())

Related

how to add image on python pyqt5

I have problem with the image is not drawn in gui. I dont understand. I want a picture to be drawn on my label.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(1022, 748)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.imge = QtWidgets.QLabel(self.centralwidget)
self.imge.setGeometry(QtCore.QRect(50, 10, 901, 511))
self.imge.setPixmap(QtGui.QPixmap("__jet_pack_man_with_weapon_flying.png"))
self.imge.setScaledContents(True)
self.imge.setObjectName("imge")
self.imge.show()
self.previous = QtWidgets.QPushButton(self.centralwidget)
self.previous.setGeometry(QtCore.QRect(100, 560, 241, 91))
self.previous.setObjectName("previous")
self.next = QtWidgets.QPushButton(self.centralwidget)
self.next.setGeometry(QtCore.QRect(570, 560, 261, 91))
self.next.setObjectName("next")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1022, 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.previous.setText(_translate("MainWindow", "Previous"))
self.next.setText(_translate("MainWindow", "Next"))
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_())

PyQT: Can subwindows use their own menubar? If so, how do I implement it

I am writing a GUI in PyQT5 and am using the MDI for multiple windows. We have a couple of pre-written GUIs (they are well established utilities) that we would like to just use as separate subwindows in an MDI environment. I have figured out how to call the other apps as subwindows, but when the subwindows have focus, the menu bar is that of the main app. That is, the menubar for the subwindow does not show. Oddly enough, when I close my main app, the menu bar of the subwindows lingers.
Here is the main menubar:
Main menubar with actions:
Here is what happens when I close the main app; the subwindows' menubar is present (but not really functional)
The menubar can be expanded but, it does nothing
Here is sample code of this situation:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from PyQt5.QtWidgets import QMainWindow, QApplication, QFileDialog, QTreeView, QMdiSubWindow
from PyQt5.QtGui import QStandardItemModel, QStandardItem, QPalette
from PyQt5 import QtCore
from PyQt5 import QtCore, QtGui, QtWidgets
# --------------- all of the gui layout class definitions ------------ #
# ----------------------- main MDI app ------------------------#
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.horizontalLayout = QtWidgets.QHBoxLayout(self.centralwidget)
self.horizontalLayout.setObjectName("horizontalLayout")
self.mdiArea = QtWidgets.QMdiArea(self.centralwidget)
self.mdiArea.setObjectName("mdiArea")
self.horizontalLayout.addWidget(self.mdiArea)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
self.menubar.setObjectName("menubar")
self.menuMenuBar = QtWidgets.QMenu(self.menubar)
self.menuMenuBar.setObjectName("menuMenuBar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionApp1 = QtWidgets.QAction(MainWindow)
self.actionApp1.setObjectName("actionApp1")
self.actionApp2 = QtWidgets.QAction(MainWindow)
self.actionApp2.setObjectName("actionApp2")
self.menuMenuBar.addAction(self.actionApp1)
self.menuMenuBar.addAction(self.actionApp2)
self.menubar.addAction(self.menuMenuBar.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.menuMenuBar.setTitle(_translate("MainWindow", "MenuBar"))
self.actionApp1.setText(_translate("MainWindow", "App1"))
self.actionApp2.setText(_translate("MainWindow", "App2"))
# ----------------------- app1 app ------------------------#
class Ui_App1(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
self.menubar.setObjectName("menubar")
self.menuApp1MenuBar = QtWidgets.QMenu(self.menubar)
self.menuApp1MenuBar.setObjectName("menuApp1MenuBar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionAction1 = QtWidgets.QAction(MainWindow)
self.actionAction1.setObjectName("actionAction1")
self.actionAction2 = QtWidgets.QAction(MainWindow)
self.actionAction2.setObjectName("actionAction2")
self.menuApp1MenuBar.addAction(self.actionAction1)
self.menuApp1MenuBar.addAction(self.actionAction2)
self.menubar.addAction(self.menuApp1MenuBar.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.menuApp1MenuBar.setTitle(_translate("MainWindow", "App1MenuBar"))
self.actionAction1.setText(_translate("MainWindow", "Action1"))
self.actionAction2.setText(_translate("MainWindow", "Action2"))
class app1(QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_App1()
self.ui.setupUi(self)
# ----------------------- app2 app ------------------------#
class Ui_App2(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
self.menubar.setObjectName("menubar")
self.menuApp2MenuBar = QtWidgets.QMenu(self.menubar)
self.menuApp2MenuBar.setObjectName("menuApp2MenuBar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionAction1 = QtWidgets.QAction(MainWindow)
self.actionAction1.setObjectName("actionAction1")
self.actionAction2 = QtWidgets.QAction(MainWindow)
self.actionAction2.setObjectName("actionAction2")
self.menuApp2MenuBar.addAction(self.actionAction1)
self.menuApp2MenuBar.addAction(self.actionAction2)
self.menubar.addAction(self.menuApp2MenuBar.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.menuApp2MenuBar.setTitle(_translate("MainWindow", "App2MenuBar"))
self.actionAction1.setText(_translate("MainWindow", "Action1"))
self.actionAction2.setText(_translate("MainWindow", "Action2"))
class app2(QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_App2()
self.ui.setupUi(self)
# ---------- subclass the subwindow to catch the close events ---------- #
class QMdiSubWindowMod(QMdiSubWindow):
def __init__(self):
super().__init__()
self.forceClose = False
def closeEvent(self, event):
if(self.forceClose):
event.accept()
else:
event.ignore()
self.hide()
# ------------------------- MainWindow ------------------------- #
class mainGui(QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
# call and open the subwindows are QMainWindows with menubars
# ------------ Sub Windows ------
self.subWinApp1 = QMdiSubWindowMod()
self.subWinApp1.setWidget(app1())
self.subWinApp1.setWindowTitle('App1')
self.ui.mdiArea.addSubWindow(self.subWinApp1)
self.subWinApp1.hide()
self.subWinApp2 = QMdiSubWindowMod()
self.subWinApp2.setWidget(app2())
self.subWinApp2.setWindowTitle('App2')
self.ui.mdiArea.addSubWindow(self.subWinApp2)
self.subWinApp2.hide()
# set up all the event handlers
self.setConnections()
def setConnections(self):
self.ui.actionApp1.triggered.connect(self.openApp1)
self.ui.actionApp2.triggered.connect(self.openApp2)
def closeEvent(self, event):
self.subWinApp1.forceClose = True
self.subWinApp1.close()
self.subWinApp2.forceClose = True
self.subWinApp2.close()
event.accept()
def openApp1(self):
self.subWinApp1.show()
self.subWinApp1.setFocus()
def openApp2(self):
self.subWinApp2.show()
self.subWinApp2.setFocus()
def openWin():
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
win = mainGui()
win.show()
return win
if __name__ == '__main__':
m = openWin()

pyqt5 designer second window button is not working

I have created two simple windows using qt5 designer. In first window there is a button which opens the second window. When the second window opens the button in it which prints a simple text is not working. I have read other post but no one has used qt5 designer!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
self.window = 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(290, 230, 181, 29))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.opensecondwindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
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", "First Page"))
self.pushButton.setText(_translate("MainWindow", "Open Second Page"))
def opensecondwindow(self):
import secondpage as scp
ui = scp.Ui_MainWindow()
ui.setupUi(self.window)
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(280, 240, 211, 71))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.openfirstwindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
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", "Second Page"))
self.pushButton.setText(_translate("MainWindow", "Print Data"))
def openfirstwindow(self):
print("Hi from second window")
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_())
any help would be appreciated!
thanks in advance

First, you two classes have the same name Ui_MainWindow.
One option to print what you want might look like this:
from PyQt5 import QtCore, QtGui, QtWidgets
# class Ui_MainWindow(object):
class Ui_MainWindow_First(object): # + _First
def setupUi(self, MainWindow):
# self.window = 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(290, 230, 181, 29))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.opensecondwindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
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", "First Page"))
self.pushButton.setText(_translate("MainWindow", "Open Second Page"))
def opensecondwindow(self):
# import secondpage as scp
# ui = scp.Ui_MainWindow()
# self.ui = Ui_MainWindow_Second()
### vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
self.w = QtWidgets.QMainWindow()
w_ui = Ui_MainWindow_Second()
w_ui.setupUi(self.w)
self.w.show()
w_ui.pushButton.clicked.connect(self.openfirstwindow)
def openfirstwindow(self):
print("Hi from second window")
### ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# class Ui_MainWindow(object):
class Ui_MainWindow_Second(object): # + _Second
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(280, 240, 211, 71))
self.pushButton.setObjectName("pushButton")
# self.pushButton.clicked.connect(self.openfirstwindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
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", "Second Page"))
self.pushButton.setText(_translate("MainWindow", "Print Data"))
# def openfirstwindow(self): #(self):
# print("Hi from second window")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
# ui = Ui_MainWindow()
ui = Ui_MainWindow_First() # Ui_MainWindow_First
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

Pyqt5: Dialogue box disappears immediately after appearing [duplicate]

This question already has answers here:
Variable scopes in Python classes
(4 answers)
Closed 2 years ago.
I have a situation in which I want a dialogue box to appear when a button is clicked. I used Qt designer to create a main window as well as a dialogue box. By looking at some online tutorials and answers on StackOverflow I managed to write this code
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(557, 383)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 70, 201, 81))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.newWindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 557, 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", "new window"))
def newWindow(self):
dialog = QtWidgets.QDialog()
self.myOtherWindow = Ui_Dialog()
self.myOtherWindow.setupUi(dialog)
dialog.show()
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(400, 300)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
if __name__ == "__main__":
import sys
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
The problem is that when I click the pushbutton, the dialogue box appears for an instance and then disappears. What am I missing?

WARNING! Never change the .ui file
All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(557, 383)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(180, 70, 201, 81))
self.pushButton.setObjectName("pushButton")
self.pushButton.clicked.connect(self.newWindow)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 557, 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", "new window"))
"""
def newWindow(self):
self.dialog = QtWidgets.QDialog()
self.myOtherWindow = Ui_Dialog()
self.myOtherWindow.setupUi(self.dialog)
self.dialog.show()
"""
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
def newWindow(self):
dialog = QtWidgets.QDialog()
dialog.setWindowTitle("Dialog")
dialog.setGeometry(800, 300, 400, 300)
dialog.exec_()
if __name__ == "__main__":
import sys
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
window = MainWindow()
window.show()
sys.exit(app.exec_())

Resizing table widget when window is maximized

I have a simple pyqt UI in which there is a table widget. I want the widget to resize when I resize the main window. There is a similar question posted on stackOverflow (Resizing table columns when window is maximized), but the answers given do not solve my purpose. In particular I tried usingself.tableWidget.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
. It resizes the column width of the table according to the table widget geometry but does not resize the widget itself when I resize the main window. I'm using pyqt5 and spyder IDE.
Here is an example
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(566, 475)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
self.tableWidget.setWindowTitle("Transactional Data")
self.tableWidget.setGeometry(QtCore.QRect(60, 30, 461, 381))
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(7)
self.tableWidget.setRowCount(5)
self.tableWidget.setAlternatingRowColors(True)
self.tableWidget.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 566, 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"))
if __name__ == "__main__":
import sys
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

Try it:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(566, 475)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.centralwidget)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.verticalLayout_2 = QtWidgets.QVBoxLayout()
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.horizontalLayout_2.addLayout(self.verticalLayout_2)
self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
self.tableWidget.setObjectName("tableWidget")
self.verticalLayout_2.addWidget(self.tableWidget)
self.tableWidget.setWindowTitle("Transactional Data")
self.tableWidget.setColumnCount(7)
self.tableWidget.setRowCount(5)
self.tableWidget.setAlternatingRowColors(True)
self.tableWidget.setHorizontalHeaderLabels(['A','B','C','D','E','F','G'])
self.tableWidget.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 24))
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"))
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_())

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