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PyQt5 – Background color to combo box if it is OFF state and mouse hover

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  • Last Updated : 23 Jan, 2023
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In this article we will see how we can set the background color to the combo box when it is in off state and mouse hover over it. By default combo box is of grey color although we can change its color. This background color only appear when combo box widget is in off state and mouse hover over it. OFF state of combo box is basically when the drop down menu is not open. In order to do this we have to change the style sheet code of the combo box, below is the style sheet code

background-color : lightgreen;

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 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
        # adding background color to the combo box when it is in OFF state
        # and mouse hover over it
        self.combo_box.setStyleSheet("QComboBox::! on:hover"
                                     "background-color: lightgreen;"
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output : When mouse hover over it

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