PyQt5 – 当鼠标悬停在行编辑部分时，行编辑部分有不同的边框宽度（对于不可编辑的组合框）

在这篇文章中，我们将看到如何在鼠标悬停在组合框的行编辑部分时为其设置不同的边框宽度，行编辑是组合框中显示所选项目的部分，它在本质上是可编辑的。为了设置和访问行编辑对象，我们分别使用setLineEdit和lineEdit方法。

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.在组合框中添加项目

3.创建一个QLineEdit对象

4.为QLineEdit对象设置边框

5.当鼠标悬停在它上面时，设置不同宽度的边框

6.使行编辑对象不可编辑（只读）

7.在组合框中添加QLineEdit对象

下面是实现方法

# 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)
  
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 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 border to the line edit part
        # set different border width when mouse hover over it
        line_edit.setStyleSheet("QLineEdit"
                                "{"
                                "border : 2px solid black"
                                "}"
                                "QLineEdit::hover"
                                "{"
                                "border-width : 1px 10px 2px 5px;"
                                "}")
  
        # making line edit read only
        line_edit.setReadOnly(True)
  
        # adding line edit object 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()
  
# start the app
sys.exit(App.exec())