PyQt5 – 当鼠标悬停时为OFF状态的组合框设置背景图片

在这篇文章中，我们将看到如何在组合框处于关闭状态和鼠标悬停在组合框上时为其设置背景图片。默认情况下，组合框没有图像，尽管我们可以为它设置图像。只有当组合框处于关闭状态并且光标在组合框上时，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::!off:hover
{
background-image : url(image.png);
border :1px 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)
 
        # 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 OFF state
        # and mouse hover over the combo box
        self.combo_box.setStyleSheet("QComboBox::! 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())