PyQt5 - 按下时将背景颜色设置为不可编辑的关闭状态组合框

在本文中，我们将了解如何将背景颜色设置为当前处于打开状态以及按下它时的不可编辑组合框。组合框的关闭状态是列表菜单未打开时。仅当组合框不可编辑且处于关闭状态以及按下组合框时，才会出现此背景颜色。

为此，我们必须更改样式表代码，下面是样式表代码

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

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 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 OFF state and it get pressed
        self.combo_box.setStyleSheet("QComboBox::! editable:! on:pressed"
                                     "{"
                                     "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())

输出 ：