PyQt5 QSpinBox – Setting base size

0 0 1 minute read

In this article we will see how we can set the base size to the spin box, base size is used to calculate a proper spin box size if the spin box defines sizeIncrement. By default, for a newly-created spin box, this property contains a size with zero width and height.

Below is the formula for getting new spin box size when main window get bigger.

width = baseSize().width() + i * sizeIncrement().width()
height = baseSize().height() + j * sizeIncrement().height()

Here i, j are the size increment in the main window

In order to set base size we use setBaseSize method.

Syntax : spin_box.setBaseSize(width, height)

Argument : It takes two integer argument i.e base and height

Return : It returns None

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 prefix to spin 
        self.spin.setPrefix("Prefix ") 
  
        # setting suffix to spin 
        self.spin.setSuffix(" Suffix") 
  
        # setting base size 
        self.spin.setBaseSize(250, 40) 
  
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 