PyQt5 – 从中间状态按下时按下指示器的背景图像 |复选框

在这篇文章中，我们将看到当我们在中间状态按下它时，如何为按下的指示器设置背景图像。当它被按下并返回到其他状态的默认状态时，它的图像应该会发生变化。默认情况下，复选框只有两种状态，虽然我们也可以设置第三种状态，即未选中或未选中，在setTristate方法的帮助下，介于这两种状态之间的称为中间状态。

为此，我们必须更改与复选框对象一起使用的中间指示器的样式表代码。下面是样式表代码。

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

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, 60)
  
        # setting tristate check box
        checkbox.setTristate(True)
  
        # changing size of indicator
        # adding background image to the pressed indicator
        # when it is in intermediate state
        checkbox.setStyleSheet("QCheckBox::indicator"
                               "{"
                               "width : 60px;"
                               "height : 60px;"
                               "}"
                               "QCheckBox::indicator:indeterminate::pressed"
                               "{"
                               "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())

输出 ：