PyQt5 – 鼠标悬停时的中间复选框背景

在这篇文章中，我们将看到如何为标签部分的复选框设置背景颜色，当鼠标悬停时，它目前处于中间状态。中间状态是介于复选和未复选之间的状态，它是在setTristate方法的帮助下创建的第三种状态。为了做到这一点，我们必须改变复选框的样式表，当鼠标悬停在它上面时，必须为中间状态添加背景色。下面是样式表的代码。

QCheckBox::indeterminate:hover
{
background-color : cyan;
}

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):
        # createing the check-box
        checkbox = QCheckBox('Geek ?', self)
 
        # setting tristate check box
        checkbox.setTristate(True)
 
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 30)
 
        # adding background color to the check box label part
        # when it is in intermediate state when mouse hover over it
        checkbox.setStyleSheet("QCheckBox:indeterminate:hover"
                               "{"
                               "background-color : cyan;"
                               "}")
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())