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PyQt5 – Adding border to non-editable off state ComboBox when mouse hover

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In this article we will see how we can add border to the non-editable combo box when it is in off state and mouse hover over it. 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 is non-editable and mouse hover over it. In order to do this we have to change the style sheet associated with the combo box, below is the style sheet code
QComboBox::!editable:!on:hover
{
border : 3px solid blue;
}
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):
        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 non-editable
        # and is in OFF state and mouse hover
        self.combo_box.setStyleSheet("QComboBox::! editable:! on:hover"
                                     "{"
                                     "border : 3px solid red;"
                                     "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

                    
Output :

Last Updated : 04 May, 2020
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