PyQt5 – 当鼠标悬停时，背景图像到不可编辑 ComboBox 的 lineedit 部分

在本文中，我们将看到当鼠标悬停在不可编辑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。
注意：当我们将行编辑添加到组合框时，它会使组合框可编辑，因此需要使行编辑不可编辑。
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. Make the line edit object non editable
6. 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;"
                        "}")

# making line edit object non editable
line_edit.setReadOnly(True)

# 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;"
                                "}")
         
        # making line edit object non editable
        line_edit.setReadOnly(True)
 
        # 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：