PyQt5 QSpinBox – Adding background color to the down button when it get pressed

In this article we will see how we can set background color to the down button of the spin box when it get pressed. Spin box is basically have three components one is the line edit other two are up and down button, down button is used to decrement the value. This background color will only appear when down button is pressed.

In order to do this we have to change the style sheet associated with the spin box, below is the style sheet code

QSpinBox::down-button:pressed
{
background-color : red;
}

Below is the implementation

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# 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")
  
        # setting style sheet of spin box
        # adding background color to the down-button when it get pressed
        self.spin.setStyleSheet("QSpinBox::down-button:pressed"
                                "{"
                                "background-color : red;"
                                "}")
  
  
  
# 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 :

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