PyQt5 QSpinBox – Getting the size of the font

Last Updated : 28 May, 2020

In this article we will see how we can get size of the spin box’s font i.e text. In order to get the size object we have to get the QFontMetrics object of the size box to get the size. The size will be in pixels.

In order to do this we use size method with the spin box’s QFontMetrics object.

Syntax : font_metrics.size(0, text)

Argument : It takes two argument one is the integer value which refer to the flags for example 0 represent single line text and second is the spin box text.

Return : It returns QSize object.

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") 
  
        # setting over line to the font 
        font = self.spin.font() 
        font.setOverline(True) 
        self.spin.setFont(font) 
  
        # creating a label 
        label = QLabel(self) 
  
        # making label multi line 
        label.setWordWrap(True) 
  
        # setting geometry to the label 
        label.setGeometry(100, 200, 300, 60) 
  
        # getting font metrics 
        f_metrics = self.spin.fontMetrics() 
  
        # text 
        text = self.spin.text() 
          
        # getting the size object 
        value = f_metrics.size(0, text) 
  
        # setting text to the label 
        label.setText("Size : " + str(value)) 
  
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 