PyQt5 - Add border to ComboBox when it get pressed

PyQt5 - Add border to OFF state ComboBox when pressed

Last Updated : 25 Apr, 2025

In this article we will see how we can add border to the combo box when it is in off state and it get pressed. OFF state is basically when the combo box list view is not open. This customized border appear only when combo box will be in off state and it is pressed. In order to do this we have to change the style sheet associated with the combo box, below is the style sheet code

QComboBox::!off:pressed
{
border : 3px solid blue;
}

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 a combo box widget
        self.combo_box = QComboBox(self)

        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 30)

        # geek list
        geek_list = ["Sayian", "Super Sayian", "Super Sayian 2", "Super Sayian B"]

        # adding list of items to combo box
        self.combo_box.addItems(geek_list)

        # editing style sheet code of combo box
        # adding border to the combo box when it is in off state
        # and when it get pressed
        self.combo_box.setStyleSheet("QComboBox::! on:pressed"
                                     "{"
                                     "border : 3px solid blue;"
                                     "}")


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

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

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

Output :

PyQt5 - Add border to ComboBox when it get pressed

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