PyQt5 QCalendarWidget – 检查它是否是给定Widget的祖先

在这篇文章中，我们将看到如何检查QCalendarWidget是否是给定widget的祖先。为了做到这一点，我们使用isAncestorOf方法，如果日历是给定的孩子的父辈（或祖辈等任何级别），并且两个部件都在同一个窗口中，那么这个方法就会返回真；否则就会返回假。

为了做到这一点，我们将使用QCalendarWidget对象的isAncestorOf方法。

语法： calendar.isAncestorOf(query)

参数： 它需要QWidget对象作为参数。

返回： 它返回bool

下面是实现的过程

# 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())