In this article we will see how we can find the child of spin box using the child type, child type is the quality of child for example push button type is QPushButton. Spin box is made of two child one is line edit whose type is QLineEdit and other is the up and down button whose type are QValidator.
In order to do this we use findChild method
Syntax : spin_box.findChild(child_type)
Argument : It takes child type as argument
Return : It returns the child object, if no child is found it return None
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 , 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( 0 , 999999 )
# setting prefix to spin
self .spin.setPrefix("Prefix ")
# setting suffix to spin
self .spin.setSuffix(" Suffix")
# getting child using child type
child = self .spin.findChild(QLineEdit)
# creating a label
label = QLabel( self )
# making it multi line
label.setWordWrap( True )
# setting its geometry
label.setGeometry( 100 , 200 , 200 , 60 )
# setting text to the label
label.setText( str (child))
# 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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Output :