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PyQt5 QSpinBox – Adding action

  • Last Updated : 06 May, 2020

In this article we will see how we can add action to the spin box, action basically a method called by spin box every time its value get changed. Adding action to the spin box as every time user change the value something should happen.

In order to add action we will use spin_box.valueChanged.connect method.

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Syntax : spin_box.valueChanged.connect(method_name)



Argument : It takes method name as argument

Action performed : Every time the value of spin box changes method will get called

Implementation steps :

1. Create a spin box
2. Create label to show the value
3. Add action to the spin box
4. Inside the action method get the current value and show it through the label

Below is the implementations




# 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, 100, 40)
  
        # adding action to the spin box
        self.spin.valueChanged.connect(self.show_result)
  
        # creating label show result
        self.label = QLabel(self)
  
        # setting geometry
        self.label.setGeometry(100, 200, 200, 40)
  
    # method called by spin box
    def show_result(self):
  
        # getting current value
        value = self.spin.value()
  
        # setting value of spin box to the label
        self.label.setText("Value : " + str(value))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
window.show()
  
# start the app
sys.exit(App.exec())

Output :




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