PyQt5 – 按下时可编辑关闭状态组合框的背景图像

在本文中，我们将看到当组合框处于可编辑关闭状态并被按下时，如何将背景图像设置为组合框。默认情况下，组合框没有图像，尽管我们可以为其设置图像。只有当组合框处于可编辑状态、关闭状态并被按下时，才会出现背景图像。关闭状态是列表视图未打开时。

为此，我们必须更改与组合框关联的样式表，下面是样式表代码

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

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 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 editable state
        # and when combo box is in off state and when it get pressed
        self.combo_box.setStyleSheet("QComboBox::editable:! on:pressed"
                                     "{"
                                     "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())

输出 ：