PyQt5 – Background image of indicator when hover over intermediate Check Box

In this article we will see how to set background image to a indicator of check box when it is in intermediate state and mouse hover over it. By default the check box have only two states although we can make a third state as well which is not checked or unchecked it is inbetween both of these states refer as intermediate state with the help of setTristate method.

In order to add background image to indicator in intermediate state we have to change the style sheet of the indicator for intermediate state and when cursor hover over it. Below is the style sheet code.

QCheckBox::indicator:indeterminate:hover
{
background-image : url(image.png);
}

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 geometry of check box
        checkbox.setGeometry(200, 150, 100, 60)

        # setting tristate check box
        checkbox.setTristate(True)

        # changing size of indicator
        # adding background image to the indicator
        # when it is in intermediate state and when cursor hover it
        checkbox.setStyleSheet("QCheckBox::indicator"
                               "{"
                               "width : 60px;"
                               "height : 60px;"
                               "}"
                               "QCheckBox::indicator:indeterminate::hover"
                               "{"
                               "background-image : url(indicator_image.png);"
                               "}")


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

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

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

Output :