PyQt5 QCalendarWidget – 设备像素比

在本文中，我们将了解如何获取 QCalendarWidget 的设备像素比。设备像素比是日历的物理像素与逻辑像素的比值。普通值是 1 用于正常 dpi 显示器，2 用于高 dpi “视网膜”显示器。

In order to do this we will use devicePixelRatio method with the QCalendarWidget object.
Syntax : calendar.devicePixelRatio()
Argument : It takes no argument
Return : It return integer

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, 650, 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)
 
        # setting cursor
        self.calendar.setCursor(Qt.PointingHandCursor)
 
        # creating a label
        label = QLabel(self)
 
        # setting geometry
        label.setGeometry(50, 280, 420, 120)
 
        # making it multi line
        label.setWordWrap(True)
 
        # getting device pixel ratio
        value = self.calendar.devicePixelRatio()
         
        # setting text to the label
        label.setText("Device pixel ration :  " + str(value))
        
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
window.calendar.destroy()
 
 
# start the app
sys.exit(App.exec())

输出：