PyQt5 QSpinBox – Getting the size increment

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In this article we will see how we can get the size increment value of spin box or not. Size increment is used when spin box size is changeable with the main window size. 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. WE can set the size increment value with the help of setSizeIncrement method.

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 do this we use sizeIncrement method with the spin box object.

Syntax : spin_box.sizeIncrement()

Argument : It takes no argument

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(0, 9) 
  
        # setting prefix to spin 
        self.spin.setPrefix("PREFIX ") 
  
        # setting suffix to spin 
        self.spin.setSuffix(" SUFFIX") 
  
        # setting size increment 
        self.spin.setSizeIncrement(10, 10) 
  
        # creating a label 
        self.label = QLabel(self) 
  
        # making label multi line 
        self.label.setWordWrap(True) 
  
        # setting label geometry 
        self.label.setGeometry(100, 200, 250, 60) 
  
        # getting the size increment value 
        value = self.spin.sizeIncrement() 
  
        # setting text to the label 
        self.label.setText("Size increment : " + str(value)) 
  
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 