PyQt5 – Setting border to view part of ComboBox on mouse hover

Last Updated : 04 May, 2020

In this article we will see how we can set border to the view part of the combo box when mouse hover over the view part. View part is basically drop down item list, which shows all the available items, we have to get the view object with the help of view method, by default combo box uses QListView object. In order to do this we have to change the style sheet associated with the combo box, below is the style sheet code to do this

QListView::hover
{
border : 3px solid red;
background : white;
}

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"]

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

        # editing style sheet code of combo box
        # adding border to the list view when mouse hover over it
        self.combo_box.setStyleSheet("QListView:hover"
                                     "{"
                                     "border : 3px solid red;"
                                     "background : white;"
                                     "}")


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

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

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