PyQt5 - 当鼠标悬停时，Bbackground 图像到 ComboBox 的 lineedit 部分

在本文中，我们将看到当鼠标悬停在组合框的行编辑部分时如何设置背景图像。行编辑是组合框的一部分，用于查看所选文本和编辑文本。为了设置和获取组合框的行编辑对象，我们使用 setLineEdit 和 lineEdit 方法。
为此，我们必须执行以下操作

1. Create a combo box
2. Add items to the combo box
3. Create a QLineEdit object
4. Add background image to the QLineEdit object when mouse hover over it
5. Add line edit object to the combo box

编程需要懂一点英语

句法：

# creating line edit object
line_edit = QLineEdit()

# setting style sheet of line edit
# adding background image when mouse hover over it
line_edit.setStyleSheet("QLineEdit::hover"
                        "{"
                        "background-image : url(logo.png);"
                        "border : 2px solid black;"
                        "}")

# adding line edit to the combo box
combo_box.setLineEdit(line_edit)

下面是实现

Python3

# 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)
 
        # creating line edit object
        line_edit = QLineEdit()
 
        # setting style sheet of line edit
        # adding background image when mouse hover over it
        line_edit.setStyleSheet("QLineEdit::hover"
                                "{"
                                "background-image : url(logo.png);"
                                "border : 2px solid black;"
                                "}")
 
        # adding line edit to the combo box
        self.combo_box.setLineEdit(line_edit)
 
# 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：