PyQt5 – 按下时为按下的指示器设置背景颜色

在本文中，我们将看到当我们在选中状态下按下它时，如何为按下的指示器设置背景颜色。当它被按下并返回到未选中状态的默认状态时，它的颜色应该会发生变化。

为了做到这一点，当指示器处于选中状态时，我们必须更改指示器按下状态的样式表代码，这与复选框对象一起使用。下面是样式表代码。

QCheckBox::indicator:checked:pressed
{
background-color : red;
}

下面是实现。

# 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, 30)
  
        # adding background color to the indicator
        # when it is pressed and in checked state
        checkbox.setStyleSheet("QCheckBox::indicator:checked:pressed"
                               "{"
                               "background-color : red;"
                               "}")
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：