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PyQt5 QSpinBox – Checking if user can change value using keyboard or not
  • Last Updated : 17 May, 2020

In this article we will see how we can check if user can change the spin box value using key board or not, when we create a spin box there are basically two ways to change the value of the spin box one is by using arrow buttons or other way is using key board. We can stop keyboard input of spin box using setReadOnly method with its line edit object.

In order to check this we use isReadOnly method with the line edit object

Syntax : line_edit.isReadOnly()

Argument : It takes no argument

Return: It returns bool



In order to do this we have to do the following :
1. Create a main window
2. Create a spin box
3. Get the line edit object from the spin box
5. Create a label to show result
6. Check if line edit is read only or not
7. Show check value on screen through label

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 prefix to spin
        self.spin.setPrefix("Prefix ")
  
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
  
        # getting the line edit
        line = self.spin.lineEdit()
  
        # making the line edit part read only
        line.setReadOnly(True)
  
        # creating a label
        label = QLabel(self)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 30)
  
        # checking if line edit is read only
        check = line.isReadOnly()
  
        # setting text to label
        label.setText("Keyboard can't change value ? : " + 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 :

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