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PyQt5 QSpinBox – Getting the under line position
  • Last Updated : 28 May, 2020

In this article we will see how we can get under line position of the spin box’s text. Under line position is the distance from the base line to where an under line should be drawn. An underline, also called an underscore, is a more or less horizontal line immediately below a portion of writing. Single and occasionally double underlining is used in hand-written or typewritten documents as a way to emphasize key text.

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

Syntax : font_metrics.underlinePos()

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")
  
        # setting under line to the font
        font = self.spin.font()
        font.setUnderline(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()
  
        # getting the under line position
        value = f_metrics.underlinePos()
  
        # setting text to the label
        label.setText("Under line position : " + 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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