PyQt5 ComboBox – 鼠标悬停时不同的边框大小

在本文中，我们将看到如何在鼠标悬停在组合框上时为组合框设置不同的边框大小，当我们为组合框设置边框时，所有边的大小相同，尽管我们可以分别更改每边的宽度. 仅当鼠标悬停在组合框上时才会出现不同的边框，否则正常边框将可见

为了做到这一点，我们必须更改与组合框关联的样式表，下面是样式表代码
代码 1

QComboBox::hover
{
border : solid black;
border-width-top : 1px;
border-width-right : 5px;
border-width-bottom : 2px;
border-width-left : 10px;
}

代码 2

QComboBox::hover
{
border : solid black;
border-width : 1px 5px 2px 10pxk
}

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)
  
        # 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 combo box
        # adding different width border when mouse hover over it
        self.combo_box.setStyleSheet("QComboBox"
                                     "{"
                                     "border : 5px solid black;"
                                     "}"
                                     "QComboBox::hover"
                                     "{"
                                     "border : solid black;"
                                     "border-width : 1px 5px 2px 10px;"
                                     "}")
  
  
# 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 ：