PyQt5 QCalendarWidget – 设备像素比

在这篇文章中，我们将看到如何获得QCalendarWidget的设备像素比。设备像素比是日历的物理像素和逻辑像素之间的比率。常见的值是1，适用于普通dpi显示器，2适用于高dpi “视网膜 “显示器。

为了做到这一点，我们将使用QCalendarWidget对象的devicePixelRatio方法。

语法： calendar.devicePixelRatio()

参数： 它不需要参数

返回： 它返回整数

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.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())