PyQt5 – 鼠标悬停时 lineedit 部分的边框颜色不同（对于不可编辑的组合框）

在本文中，我们将看到当鼠标悬停在行编辑部分上时，如何为组合框的行编辑部分设置不同的边框颜色，行编辑是组合框显示所选项目的部分，它本质上是可编辑的.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：当我们创建行编辑对象时，它使组合框可编辑。

In order to do this we have to do the following :

1. Create a combo box
2. Add item to the combo box
3. Create a QLineEdit object
4. Set border to the QLineEdit object
5. Set border with different color when mouse hover over it
6. Make line edit object non-editable(read-only)
7. Add QLineEdit object to the combo box

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 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 color when mouse hover over it
        line_edit.setStyleSheet("QLineEdit"
                                "{"
                                "border : 5px solid black;"
                                "}"
                                "QLineEdit::hover"
                                "{"
                                "border-color : red green blue yellow"
                                "}")
  
        # making line edit object 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())

输出 ：