PyQt5 QCalendarWidget - 检查它是否是给定小部件的祖先

在本文中，我们将看到如何检查 QCalendarWidget 是否是给定小部件的祖先。为此，我们使用isAncestorOf方法，如果日历是给定子级的父级（或祖父级等任何级别），并且两个小部件位于同一窗口内，则此方法返回 true；否则返回假。

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

下面是实现

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())

输出：