Unsolved Trying to use closeEvent on MainWindow if user press X
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@DouglinhasZN Can you please show how you're using Ui_Proofo? One usually does not use generated Ui_ classes directly as all manual changes in there will be lost next time the code is generated.
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How I am using it? Im guessing you'd like the snippets for my code?
import sys from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import QMessageBox import urllib3 from urllib.request import urlopen from bs4 import BeautifulSoup from urllib.parse import urlparse urllib3.disable_warnings() class Ui_Proofo(object): def setupUi(self, Proofo): {Here is the UI, so all my labels, buttons, boxes etc.} def retranslateUi(self, Proofo): if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) Proofo = QtWidgets.QMainWindow() ui = Ui_Proofo() ui.setupUi(Proofo) Proofo.show() sys.exit(app.exec_())
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@DouglinhasZN You should do it like described in the link above: create another class (call it for example MainWindow) and load your Ui_Proofo there as UI and then implement the close event in MainWindow.
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Thank you @jsulm , I gave it a go:
from CVE_Design import Ui_Proofo class MainWindow(QWidget): def __init__(self): super(MainWindow, self).__init__() self.ui = Ui_Proofo() # Here you use the class from designer to create the UI self.ui.setupUi(self) def closeEvent(self, event): close = QMessageBox.question(self, "QUIT", "Are you sure want to stop process?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No) if close == QMessageBox.Yes: event.accept() else: event.ignore()
However, nothing seems to happen. I apologise if I seem to be overcomplicating it, but I really am clueless now.
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@DouglinhasZN said in Trying to use closeEvent on MainWindow if user press X:
However, nothing seems to happen.
What does this mean? You get no UI appear when you run the program,
MainWindow.__init__()
is not called, , or you don't get the close message box when you try to close the widget? Do yourself a favor and at least put in a couple ofprint()
statements so you know what is being executed. -
@JonB I had some print statement, but they dont get printed. The code itself don't seem to run. When I close the application, nothing happens, it just closes as it normally would
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@DouglinhasZN
Nothing shown in your post above is going to run if you never create an instance ofMainWindow
. You only show that fragment of your code, not where you create it from, so who knows. -
@JonB said in Trying to use closeEvent on MainWindow if user press X:
your post above is going to run if you never create an instance of MainWindow.
What do you mean where I create it from?
@JonB -
@JonB I see where you are coming from, you mean adding the following under: if name == "main":
w = MainWindow() w.setupUi(MainWindow)
?
I have tried that and indeed it does work, but it creates a new application. In that application it does everything I want it to, but its not my main one -
@DouglinhasZN
I'm sorry, I really don't understand. There is no "new application"! I suspect you mean a new, separate window, which is kind of what I was wondering....We have seen your latest
class MainWindow(QWidget):
definition. Can you now paste the whole of your code fromif __name__ == "__main__":
downward and then we might see what is going on. The trouble is we keep seeing snippets....
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Hello!
You can try my code, it should intercept the close event:
class UI_MainWindow(QMainWindow): def __init__(self): super(UI_MainWindow, self).__init__() print("Initialization succeeded") def closeEvent(self, event): print("closeEvent has been called") userResult = QMessageBox.question(None, "Quit", "Do you want to close the program?", QMessageBox.Yes, QMessageBox.No) if userResult == QMessageBox.Yes: event.accept() else: event.ignore()
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@JonB I see, I have posted the whole of my code up in the thread, but here it is:
import sys from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import QMessageBox import urllib3 from urllib.request import urlopen from bs4 import BeautifulSoup from urllib.parse import urlparse urllib3.disable_warnings() class Ui_Proofo(object): def setupUi(self, Proofo): {Here is the UI, so all my labels, buttons, boxes etc.} def retranslateUi(self, Proofo): from CVE_Design import Ui_Proofo class MainWindow(QWidget): def __init__(self): super(MainWindow, self).__init__() self.ui = Ui_Proofo() self.ui.setupUi(self) def closeEvent(self, event): close = QMessageBox.question(self, "QUIT", "Are you sure want to stop process?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No) print("okay this is done 2") if close == QMessageBox.Yes: print("okay this is done 3") event.accept() else: event.ignore() if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) Proofo = QtWidgets.QMainWindow() ui = Ui_Proofo() ui.setupUi(Proofo) Proofo.show() sys.exit(app.exec_())
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So, what happens when you press
X
on theMainWindow
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@DouglinhasZN
You have written a newclass MainWindow
with thecloseEvent()
in it, but you never create/useMainWindow
anywhere in your code, do you? That's why it has no effect.Proofo = QtWidgets.QMainWindow()
still creates it asQMainWindow
. You need to create it as aMainWindow
to use the code shown.Sorry, I haven't any more time right now, hopefully someone will show what you're supposed to do. Hopefully it's just
Proofo = MainWindow()
And I think you want to get rid of your
ui = Ui_Proofo() ui.setupUi(Proofo)
because
MainWindow.__init__()
is doing that bit. So:if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) Proofo = MainWindow() Proofo.show() sys.exit(app.exec_())
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@Cobra91151 Nothing happens, its almost as if its not linking that class to the overall GUI.
Instead, if I addw = MainWindow() w.setupUi(MainWindow)
Then it will load up a new window as well as the main window. On that new window, the code will work fine
@JonB I hear what you're saying, I had similar code to what you've suggested but I ran with your suggestion and it opens up a new blank window rather than my Ui from Qt Designer (Proofo)
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@DouglinhasZN said in Trying to use closeEvent on MainWindow if user press X:
w = MainWindow()
w.setupUi(MainWindow)That code does not make sense.
Straight from the documentation I linked:
import sys from PyQt5.QtWidgets import QApplication, QDialog from ui_imagedialog import Ui_ImageDialog << The file generated from your .ui file app = QApplication(sys.argv) window = QDialog() << a widget ui = Ui_ImageDialog() << instance of the generated class ui.setupUi(window) << the parameter of setupUi must be an instance of a QWidget based class. In this case QDialog. window.show() sys.exit(app.exec_())