PyQt5 QCalendarWidget – Destroyed signal
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 librariesfrom PyQt5.QtWidgets import *from PyQt5 import QtCore, QtGuifrom PyQt5.QtGui import *from PyQt5.QtCore import *import sysclass 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 appApp = QApplication(sys.argv)# create the instance of our Windowwindow = Window()# start the appsys.exit(App.exec()) |
Output :
