PyQt5 QCalendarWidget – Checking if it is ancestor of given widget

In this article we will see how we can check if the QCalendarWidget is ancestor of the given widget or not. In order todo so we use isAncestorOf method, this method returns true if the calendar is a parent, (or grandparent and so on to any level), of the given child, and both widgets are within the same window; otherwise returns false.

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

Syntax : calendar.isAncestorOf(query)

Argument : It takes QWidget object as argument

Return : It return bool

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, 650, 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 calendar
        self.calendar.setGeometry(50, 10, 400, 250)

        # setting cursor
        self.calendar.setCursor(Qt.PointingHandCursor)

        # creating label to show the properties
        self.label = QLabel(self)

        # setting geometry to the label
        self.label.setGeometry(100, 280, 250, 60)

        # making label multi line
        self.label.setWordWrap(True)

        # getting third child of the calendar
        child = self.calendar.children()[3]

        # checking if the calendar is ancestor of the child
        value = self.calendar.isAncestorOf(child)

        # setting text to the label
        self.label.setText("Ancestor ? : " + str(value))





# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output: