PyQt5 – 鼠标悬停时 ComboBox 行编辑的背景颜色

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颜色，组合框的行编辑部分是显示和编辑文本的地方。

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. 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;"
                        "}")
        
        
# 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::hover"
                                "{"
                                "background : lightblue;"
                                "}")
  
  
        # 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：