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PyQt5 QSpinBox – Getting the sender signal index value

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  • Last Updated : 28 May, 2020
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In this article we will see how we can get the spin box sender signal index value. Sender signal index is the meta-method index of the signal that called the currently executing slot, which is a member of the class returned by sender. If called outside of a slot activated by a signal, -1 is returned.

In order to do this we use senderSignalIndex method with the spin box object.

Syntax : spin_box.senderSignalIndex()

Argument : It takes no argument

Return : It returns integer value

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")
  
        # 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 sender signal index
        value = self.spin.senderSignalIndex()
  
        # setting text to the label
        self.label.setText("Sender Signal Index : " + 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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