PyQt5 – 设置未选中的复选框指标在点击时的背景颜色

在这篇文章中，我们将看到如何在未选中的状态下为被按下的指标设置背景色。当它被按下时，它的颜色应该被改变，并回到选中状态的默认状态。

为了做到这一点，我们必须改变用于复选框对象的样式表代码。下面是样式表的代码。

QCheckBox::indicator:unchecked:pressed
{
background-color : green;
}

以下是实施情况。

# 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 from unchecked state
        checkbox.setStyleSheet("QCheckBox::indicator"
                               "{"
                               "width :30px;"
                               "height :30px;"
                               "}"
                               "QCheckBox::indicator:unchecked:pressed"
                               "{"
                               "background-color : green;"
                               "}")
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())