PyQt5 ComboBox - 按下时与向下箭头不同的边框颜色

在本文中，我们将看到如何在按下向下箭头时为向下箭头设置不同颜色的边框，基本上，当我们为向下箭头设置边框时，尽管我们可以更改其颜色，但所有边的颜色都是相同的。

为此，我们必须更改与组合框关联的样式表，以下是样式表代码 -
代码 1

QComboBox::down-arrow:pressed
{
border : 5px solid;
border-color-top : red;
border-color-right : green;
border-color-bottom : blue;
border-color-left : yellow;
}

代码 2

QComboBox::down-arrow:pressed
{
border : 5px solid;
border-color : red green blue yellow
}

两个代码都执行类似的任务，只是代码 1 是代码 2 的扩展版本。

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)
  
        # 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)
  
        # setting style sheet
        # adding border to down arrow
        # adding different border color when get pressed
        self.combo_box.setStyleSheet("QComboBox::down-arrow"
                                     "{"
                                     "border : 5px solid black;"
                                     "}"
                                     "QComboBox::down-arrow:pressed"
                                     "{"
                                     "border : 5px solid;"
                                     "border-color : red green blue yellow;"
                                     "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
window.show()
  
# start the app
sys.exit(App.exec())

输出 ：