📜  PyQt5 QSpinBox – 获取垂直逻辑 DPI 值

📅  最后修改于: 2022-05-13 01:55:32.849000             🧑  作者: Mango

PyQt5 QSpinBox – 获取垂直逻辑 DPI 值

在本文中,我们将了解如何以旋转框的每英寸点数 (DPI) 为单位获得设备的垂直分辨率。每英寸逻辑点数用于将字体和用户界面元素从点大小转换为像素大小,并且可能与每英寸物理点数不同。

注意:如果垂直逻辑 DPI 不等于物理垂直 DPI,则相应的 QPaintEngine 必须处理分辨率映射。

为了做到这一点,我们对旋转框对象使用logicalDpiY方法。

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, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
        # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)
  
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
  
        # setting range to the spin box
        self.spin.setRange(1, 999999)
  
        # setting prefix to spin
        self.spin.setPrefix("PREFIX ")
  
        # setting suffix to spin
        self.spin.setSuffix(" SUFFIX")
  
        # creating a label
        label = QLabel(self)
  
        # making the label multi line
        label.setWordWrap(True)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 200, 60)
  
        # getting the vertical logical dpi value
        value = self.spin.logicalDpiY()
  
        # setting text to the label
        label.setText("Vertical DPI(logical) : " + 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 :