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

Python3 1==

# 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())