PyQt5 QCalendarWidget – 获取后台角色

在本文中，我们将了解如何获取 QCalendarWidget 的后台角色。背景角色定义了用于渲染背景的日历调色板中的画笔。如果未设置显式后台角色，则日历将继承其父窗口小部件的后台角色。为了设置背景角色，我们使用 setBackgroundRole 方法。

In order to do this we will use backgroundRole method with the QCalendarWidget object.
Syntax : calendar.backgroundRole()
Argument : It takes no argument
Return : It return QPalette.ColorRole object but when printed its shows its associated 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 components
    def UiComponents(self):
 
        # creating a QCalendarWidget object
        self.calendar = QCalendarWidget(self)
 
        # setting geometry to the calendar
        self.calendar.setGeometry(50, 10, 400, 250)
 
        # enabling auto fill background
        self.calendar.setAutoFillBackground(True)
 
        # setting background role
        self.calendar.setBackgroundRole(QPalette.Base)
 
        # getting palette and setting color to the background to it
        p = self.calendar.palette()
        p.setColor(self.calendar.backgroundRole(), Qt.yellow)
        self.calendar.setPalette(p)
 
        # creating a label
        label = QLabel(self)
 
        # setting geometry
        label.setGeometry(120, 280, 200, 60)
 
        # making it multi line
        label.setWordWrap(True)
 
        # getting the background role
        value = self.calendar.backgroundRole()
 
        # setting text to the label
        label.setText("Background Role : " + str(value))
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
 
# start the app
sys.exit(App.exec())

输出：