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PyQt5 QSpinBox – Adding border to the up arrow when mouse hover

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In this article we will see how we can add border to the up arrow when mouse hover over it, we know there exist two buttons up and down in spin box and up arrow is the internal part of the up button. Up arrow is the subset of up button and up button is subset of spin box. By default there is no boroder to the up arrow although we can add it, customized border will only appear when mouse hover over it. In order to do this we have to change the style sheet code associated with the spin box, below is the style sheet code

border : 4px solid red;

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):
        # setting title
        self.setWindowTitle("Python ")
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
        # calling method
        # showing all the widgets
    # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 60)
        # setting prefix to spin
        self.spin.setPrefix("Prefix ")
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
        # setting style sheet to the spin box
        # adding border to the up button
        # adding border to the up arrow
        # when mouse hover over it
                                "border : 3px solid lightgreen;"
                                "border : 4px solid red;"
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app


Output :

Last Updated : 06 Feb, 2023
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