PyQt5 – 鼠标悬停时可编辑关闭状态组合框的背景颜色

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的可编辑组合框以及将鼠标悬停在其上时。组合框的关闭状态是列表菜单未打开时。仅当组合框可编辑且处于关闭状态以及光标悬停在组合框上时，才会出现此背景颜色。组合框在setEditable方法的帮助下可编辑。

为此，我们必须更改样式表代码，下面是样式表代码

QComboBox::editable:!on:hover
{
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)
  
        # making combo box editable
        self.combo_box.setEditable(True)
  
        # 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 editable
        # and when it is in OFF state and mouse hover over it
        self.combo_box.setStyleSheet("QComboBox::editable:! on:hover"
                                     "{"
                                     "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 ：