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PyQt5 QCalendarWidget – Destroyed signal

  • Last Updated : 07 Aug, 2021

In this article, we will see how we can get the destroyed signal from the QCalendarWidget. Destroyed signal is emitted immediately before the QCalendarWidget is destroyed, after any instances of QPointer have been notified, and cannot be blocked. All the objects’ children are destroyed immediately after this signal is emitted.

In order to do this we will use destroyed method with the QCalendarWidget object.
Syntax : calendar.destroyed.connect(lambda: print(“Destroyed Signal”))
Argument : It takes method as argument
Action Performed : It will print the message whenever activated signal get emitted 
 

Below is the implementation  

Python3




# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys
 
 
class Window(QMainWindow):
 
    def __init__(self):
        super().__init__()
 
        # setting title
        self.setWindowTitle("Python ")
 
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
 
        # calling method
        self.UiComponents()
 
        # showing all the widgets
        self.show()
 
    # method for components
    def UiComponents(self):
 
        # creating a QCalendarWidget object
        calendar = QCalendarWidget(self)
 
        # setting geometry to the calendar
        calendar.setGeometry(50, 50, 400, 250)
 
        # creating a label
        label = QLabel(self)
 
        # setting geometry to the label
        label.setGeometry(100, 280, 250, 60)
 
        # making label multi line
        label.setWordWrap(True)
 
        # text
        text = "Destroyed Signal Emitted "
 
        # getting the destroyed signal and
        # when receives the signal printing the message
        calendar.destroyed.connect(lambda: label.setText(text))
 
        # creating push button
        push = QPushButton("Destroy ", self)
 
        # adding action to it
        push.clicked.connect(lambda: calendar.deleteLater())
 
 
 
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

Output : 

 


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