PyQt5 – 打开状态下的不可编辑组合框的背景颜色

在这篇文章中，我们将看到如何为当前处于开启状态的不可编辑的组合框设置背景色。组合框的开启状态是当列表菜单被打开时。这个背景色只有在组合框不可编辑且处于开启状态时才会出现。

为了做到这一点，我们必须改变样式表的代码，下面是样式表的代码—-。

QComboBox::!editable:on
{
background-color : lightgreen;
}

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 a combo box widget
        self.combo_box = QComboBox(self)
  
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 30)
  
        # geek list
        geek_list = ["Sayian", "Super Sayian", "Super Sayian 2", "Super Sayian B"]
  
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
  
        # adding background color to the combo box when it is non editable
        # and when it is in ON state
        self.combo_box.setStyleSheet("QComboBox::! editable:on"
                                     "{"
                                     "background-color: lightgreen;"
                                     "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())