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.
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 :