PyQt5 QSpinBox – Setting background role

In this article we will see how we can set the background role to the spin box, there are basically two types of roles in spin box one is foreground and the other one is background. Background role defines the brush from the spin box’s palette that is used to render the background. If no explicit background role is set, the spin box inherits its parent widget’s background role.

In order to do this we use setBackgroundRole method

Syntax : spin_box.setBackgroundRole(color_object)
Argument : It takes QPalette.ColorRole object argument
Return : It returns 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 prefix to spin
        self.spin.setPrefix("Prefix ")

        # setting suffix to spin
        self.spin.setSuffix(" Suffix")

        # making auto fill background of spin box
        self.spin.setAutoFillBackground(True)

        # setting background role
        self.spin.setBackgroundRole(QPalette.Base)

        # getting palette and setting color to the background to it
        p = self.spin.palette()
        p.setColor(self.spin.backgroundRole(), Qt.darkGray)
        self.spin.setPalette(p)


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :