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PyQt5 – Round indicator of CheckBox

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  • Last Updated : 22 Apr, 2020

In this article we will see how to create round indicator of check box. By default, check box have square indicator although with the help of style sheet we can change it make it round. Below is the representation of normal indicator vs the round indicator of check box.

In order to do this we have to do the following :

  1. Setting up the border to indicator as when we try to change the shape border will get vanish, so in order to deal with it we will provide custom border to it.
  2. Set the size of indicator and it should be in square shape.
  3. Set the border radius to sum of half of the length of indicator and the thickness of border i.e
    radius = width/2 + thickness

Style sheet code –

QCheckBox::indicator
{
border : 2px solid black;
width : 20px;
height : 20px;
border-radius : 22px;
}

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 the check-box
        checkbox = QCheckBox('Geek ?', self)
  
        # setting tristate check box
        checkbox.setTristate(True)
  
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 40)
  
        # adding border to the check box and padding
        # adding border to indicator and setting size
        # setting border radius
        checkbox.setStyleSheet("QCheckBox"
                               "{"
                               "border : 2px solid clack;"
                               "padding : 5px;"
                               "}"
                               "QCheckBox::indicator"
                               "{"
                               "border : 2px solid black;"
                               "width : 20px;"
                               "height : 20px;"
                               "border-radius :12px;"
                               "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

Output :


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