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

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, 650, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for components
    def UiComponents(self):
  
        # creating a QCalendarWidget object
        self.calender = QCalendarWidget(self)
  
        # setting geometry to the calender
        self.calender.setGeometry(50, 10, 400, 250)
  
        # setting cursor
        self.calender.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.calender.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.calender.destroy()
  
  
# start the app
sys.exit(App.exec())

输出 ：