PyQt5 – 在鼠标悬停时将背景颜色设置为不可编辑 ComboBox 的 lineedit

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，如何设置背景颜色，组合框的行编辑部分是显示和编辑文本的位置。

注意：当我们将行编辑对象添加到组合框时，它会使组合框可编辑，因此需要使行编辑不可编辑。

In order to add background color to the line edit part of the combo box when mouse hover over it, do the following –

1. Create a combo box
2. Create a line edit widget
3. Change background color of the line edit widget for mouse hover over it
4. Make line edit non editable
5. Add line edit widget to the combo box

编程需要懂一点英语

句法：

# creating line edit widget
line_edit = QLineEdit()
        
# setting background color to the line edit widget
line_edit.setStyleSheet("QLineEdit::hover"
                        "{"
                        "background : lightblue;"
                        "}")
 
# making line edit non editable
line_edit.setReadOnly(True)
        
# adding line edit widget to combo box
self.combo_box.setLineEdit(line_edit)

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 combo box widget
        self.combo_box = QComboBox(self)
  
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 30)
  
        # making combo box editable
        self.combo_box.setEditable(True)
  
        # 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 widget
        line_edit = QLineEdit()
  
        # setting background color to the line edit widget
        # when mouse hover over it
        line_edit.setStyleSheet("QLineEdit"
                                "{"
                                "background : lightblue;"
                                "}")
  
        # making line edit non editable
        line_edit.setReadOnly(True)
  
        # adding line edit widget to combo box
        self.combo_box.setLineEdit(line_edit)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出：