PyQt5 QCalendarWidget – 设备像素比的浮点数
在这篇文章中,我们将看到如何获得设备像素比,QCalendarWidget的浮点值。设备像素比是日历的物理像素和逻辑像素之间的比率。对于普通的dpi显示器来说,常见的值是1,对于高dpi的 “视网膜 “显示器来说,常见的值是2,对于一些设备来说,它是十进制的值,如1.1,1.2等。
为了做到这一点,我们将使用QCalendarWidget对象的devicePixelRatioF方法。
语法: calendar.devicePixelRatioF()
参数: 它不需要参数
返回: 它返回float
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 float
value = self.calendar.devicePixelRatioF()
# setting text to the label
label.setText("Device pixel ration (Float) : " + 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 :