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PyQt5 ComboBox – Different border color when in ON state
  • Last Updated : 06 May, 2020

In this article we will see how we can set different border color to the combo box when it is in ON state, when we set border to the combo box it is of same color for all the sides although we can change color of each sides respectively. Colorful border will only appear combo box is in on state i.e list view is opened.

In order to do so we have to change the style sheet associated with the combo box below is the style sheet code
Code 1

QComboBox::on
{
border : 5px solid;
border-color-top : red;
border-color-right : green;
border-color-bottom : blue;
border-color-left : yellow;
}

Code 2

QComboBox::on
{
border : 5px solid;
border-color : red green blue yellow
}

Both code perform similar task just code 1 is extended version of code 2.

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 check-able combo box object
        self.combo_box = QComboBox(self)
  
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 80)
  
        # 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)
  
        # setting style sheet
        # adding border to combo box
        # adding colorful border when it is ON
        self.combo_box.setStyleSheet("QComboBox"
                                     "{"
                                     "border : 5px solid black;"
                                     "}"
                                     "QComboBox::on"
                                     "{"
                                     "border : 5px solid;"
                                     "border-color : red green blue yellow;"                                     
                                     "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
window.show()
  
# start the app
sys.exit(App.exec())

Output :

When item view is opened

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