PyQt5 – 当鼠标悬停在非可编辑的关闭状态的组合框上时，背景图片

在这篇文章中，我们将看到如何为组合框设置背景图片，当它处于不可编辑的关闭状态时，鼠标悬停在它上面。默认情况下，组合框没有图像，尽管我们可以为它设置图像。只有当组合框处于不可编辑状态、关闭状态和鼠标悬停在它上面时，背景图像才会出现。关闭状态是指列表视图没有打开的时候。

为了做到这一点，我们必须改变与组合框相关的样式表，下面是样式表的代码

QComboBox::!editable:!on:hover
{
background-image : url(image.png);
border : 2px solid black;
}

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 check-able combo box object
        self.combo_box = QComboBox(self)
  
        # making combo box editable
        # self.combo_box.setEditable(True)
  
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 200, 80)
  
        # 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)
  
        # setting style sheet of the combo box
        # adding background image to the combo box it is in non-editable state
        # and when combo box is in off state and mouse hover over it
        self.combo_box.setStyleSheet("QComboBox::! editable:! on:hover"
                                     "{"
                                     "background-image : url(logo.png);"
                                     "border : 2px solid black;"
                                     "}")
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
window.show()
  
# start the app
sys.exit(App.exec())