PyQt5 QDateEdit – Name Change Signal

In this article we will see how we can get the name change signal of the QDateEdit. Name is basically used for finding widget in the window and also for style sheet to edit the style sheet of the given name widget. This signal is emitted after the object’s name has been changed.

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 use objectNameChanged method with the QDateEdit object

Syntax : date.objectNameChanged.connect(method)

Argument : It takes method as argument



Return : It returns None

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, 500, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for components
    def UiComponents(self):
  
        # creating a QDateEdit widget
        date = QDateEdit(self)
  
        # setting geometry of the date edit
        date.setGeometry(100, 100, 150, 40)
  
        # creating a label
        label = QLabel("GeeksforGeeks", self)
  
        # setting geometry
        label.setGeometry(100, 150, 200, 60)
  
        # making label multiline
        label.setWordWrap(True)
  
        # getting name change signal
        date.objectNameChanged.connect(lambda: date_method())
  
        # method called by date edit
        def date_method():
  
            # setting text to the label
            label.setText("Name Change Signal Emitted")
  
        # setting name to the dat edit
        date.setObjectName("Geeks")
  
  
# 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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