In this article we will see how we can check if the spin box is ancestor of the given child. If spin box is a parent, (or grandparent and so on to any level), of the given child, and both spin box and child are within the same window then true it is ancestor otherwise it is not.
In order to do this we use isAncestorOf method with the spin box object.
Syntax : spin_box.isAncestorOf(child)
Argument : It takes QWidget object argument
Return : It returns bool
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 widgets def UiComponents(self): # creating spin box self.spin = QSpinBox(self) # setting geometry to spin box self.spin.setGeometry(100, 100, 250, 40) # setting range to the spin box self.spin.setRange(1, 999999) # setting prefix to spin self.spin.setPrefix("PREFIX ") # setting suffix to spin self.spin.setSuffix(" SUFFIX") # getting child of spin box child = self.spin.children()[0] # creating a label label = QLabel(self) # making the label multi line label.setWordWrap(True) # setting geometry to the label label.setGeometry(100, 200, 200, 60) # checking if spin box is ancestor check = self.spin.isAncestorOf(child) # setting text to the label label.setText("Ancestor ? : " + str(check)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
