In this article we will see how we can check if the signals are blocked or not of the spin box, blocking signals means the connected methods with the spin box will not receive the signals for example when we add action to it when its value changes that action will not work. Signals emitted while being blocked are not buffered. In order to block signals we use blockSignals
method.
In order to do this we use signalsBlocked method.
Syntax : spin_box.signalsBlocked()
Argument : It takes no argument
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" )
# blocking signals of the spin box
self .spin.blockSignals( True )
# creating a label
self .label = QLabel( "Label " , self )
# setting geometry to the label
self .label.setGeometry( 100 , 200 , 300 , 30 )
# checking if signals are blocked or not
check = self .spin.signalsBlocked()
# setting text to the label
self .label.setText( "Signals Blocked ? : " + str (check))
# create pyqt5 app App = QApplication(sys.argv)
# create the instance of our Window window = Window()
# start the app sys.exit(App. exec ())
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Output :