PyQt5 – 当鼠标悬停在非可编辑组合框的行编辑部分时的背景图片

在这篇文章中，我们将看到如何在鼠标悬停在非可编辑组合框的行编辑部分上设置背景图片。行编辑是组合框的一部分，用于查看选定的文本和编辑文本。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： 当我们在组合框中添加行编辑时，它使组合框可编辑，因此有必要使行编辑不可编辑。

为了做到这一点，我们必须做以下工作

1.创建一个组合框

2.向组合框中添加项目

3.创建一个QLineEdit对象

4.当鼠标悬停在QLineEdit对象上时，为其添加背景图片

5.使行编辑对象不可编辑

6.在组合框中添加行编辑对象

语法：

# 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)

以下是实施

# 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())