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PyQt5 QCalendarWidget – Object Name Changed signal
  • Last Updated : 03 Jun, 2020

In this article we will see how we can get the object name changed signal from the QCalendarWidget. Object name changed signal is emitted after the object’s name has been changed. The new object name is passed as objectName.

Note : This is a private signal. It can be used in signal connections but cannot be emitted by the user.

In order to do this we will use objectNameChanged method with the QCalendarWidget object.

Syntax : calender.objectNameChanged.connect(lambda: print(“Object name change signal Signal”))

Argument : It takes method as argument



Action Performed : It will print the message whenever activated signal get emitted

Below is the implementation




# 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
        self.calendar = QCalendarWidget(self)
  
        # setting geometry to the calender
        self.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 = "Object name changed signal emitted"
  
        # getting the object name changed signal
        self.calendar.objectNameChanged.connect(lambda: label.setText(text))
  
        # changing object name
        self.calendar.setObjectName("New Name")
  
  
  
  
# 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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