PyQt5 – 当鼠标悬停在非可编辑组合框的行编辑部分时添加边框

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时为其设置边界。行编辑部分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。

注意：当我们在组合框中添加行编辑对象时，它使组合框可编辑，因此需要使行编辑对象不可编辑。

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.在组合框中添加项目

3.创建一个QLineEdit对象

4.使行编辑对象不可编辑

5.当鼠标悬停在QLineEdit对象上时，为其设置边界

6.在组合框中添加QLineEdit对象

语法:

# creating line edit object
line_edit = QLineEdit()

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

# setting border to the line edit when mouse hover over it
line_edit.setStyleSheet("QLineEdit::hover"
                        "{"
                        "border : 2px solid green;"
                        "}")

# adding line edit object to the combo box
self.combo_box.setLineEdit(line_edit)

以下是实施情况

# 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)
  
        # 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()
  
        # making line edit non editable
        line_edit.setReadOnly(True)
  
        # setting border to the line edit when mouse hover over it
        line_edit.setStyleSheet("QLineEdit::hover"
                                "{"
                                "border : 2px solid green;"
                                "}")
  
        # 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())