PyQt5 QSpinBox – 获取后台角色

在本文中，我们将了解如何获取旋转框的背景角色，旋转框中的角色基本上有两种类型，一种是前景，另一种是背景。背景角色定义了用于渲染背景的微调框调色板中的画笔。如果未设置显式背景角色，则微调框将继承其父窗口小部件的背景角色。为了设置它，我们使用 setBackgroundRole 方法。

为了做到这一点，我们使用 backgroundRole 方法。

Syntax : spin_box.backgroundRole()
Argument : It takes no argument
Return : It returns QPalette.ColorRole object but when printed it shows its value

编程需要懂一点英语

下面是实现

Python3

# 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 spin box
        self.spin = QSpinBox(self)
 
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
 
        # setting prefix to spin
        self.spin.setPrefix("Prefix ")
 
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
 
 
        # creating a label
        label = QLabel(self)
 
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 30)
 
        # getting the background role object
        object = self.backgroundRole()
 
        # setting text to the label
        label.setText("Background role object value : " + str(object))
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出：