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 :