PyQt5 - Setting background color to ComboBox when mouse hover

Last Updated : 22 Apr, 2020

In this article we will see how we can set the background color to the combo box when mouse hover over it. By default combo box is of grey color although we can change its color. This background color only appear when mouse hover over the combo box widget. In order to do this we have to change the style sheet code of the combo box, below is the style sheet code -

QComboBox::hover
{
background-color : lightgreen;
}

Below is the implementation

Python3 1==

# 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"]

        # making it editable
        self.combo_box.setEditable(True)

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

        # adding background color to the combo box when mouse hover over it
        self.combo_box.setStyleSheet("QComboBox::hover"
                                     "{"
                                     "background-color: lightgreen;"
                                     "}")


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

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

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