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PyQt5 QCalendarWidget – Destroyed signal
  • Last Updated : 03 Jun, 2020

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 : calender.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

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# 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
        calender = QCalendarWidget(self)
  
        # setting geometry to the calender
        calender.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
        calender.destroyed.connect(lambda: label.setText(text))
  
        # creating push button
        push = QPushButton("Destroy ", self)
  
        # adding action to it
        push.clicked.connect(lambda: calender.deleteLater())
  
  
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

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Output :

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