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PyQt5 QSpinBox – Getting Horizontal Logical DPI value
  • Last Updated : 28 May, 2020

In this article we will see how we can get the horizontal resolution of the device in dots per inch(DPI) of the spin box. Logical dots per inch are used to convert font and user interface elements from point sizes to pixel sizes, and might be different from the physical dots per inch.

Note : If the horizontal logical DPI doesn’t equal to the physical horizontal DPI then the corresponding QPaintEngine must handle the resolution mapping.

In order to do this we use logicalDpiX method with the spin box object.

Syntax : spin_box.logicalDpiX()

Argument : It takes no argument



Return : It returns integer

Below is the implementation




# 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 horizontal logical dpi value
        value = self.spin.logicalDpiX()
  
        # setting text to the label
        label.setText("Horizontal 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())

Output :

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