PyQt5 – 为不确定的复选框按下时设置皮肤

在这篇文章中，我们将看到如何为处于中间（不确定）状态并被按下的复选框设置皮肤，这个皮肤只在复选框被按下并且其状态是不确定的时候出现。不确定是复选框的第三种状态，它介于选中和未选中状态之间，可以在setTristate方法的帮助下创建。

为了在复选框处于不确定状态并被按下时给指示器添加金，我们必须改变样式表代码。下面是样式表的代码。

QCheckBox::indicator:indeterminate:pressed
{
border-image : url(image.png);
}

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
        checkbox1 = QCheckBox('Geek ?', self)
  
        # setting tristate check box
        checkbox1.setTristate(True)
        # setting geometry of check box
        checkbox1.setGeometry(200, 150, 100, 40)
  
        # changing style sheet code of check box
        # adding skin to indeterminate indicator when it get pressed
        checkbox1.setStyleSheet("QCheckBox::indicator:indeterminate:pressed"
                                "{"
                                "border-image : url(image.png);"
                                "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())