We can set the state of the check box using setChecked or for tristate check box we can set its states using setCheckState method. nextCheckState sets the next state of the check box i.e for default check box if initial check state is checked, it will set it to un-checked and vice versa. For tri-state check box if check state if un-checked it will set it to intermediate state and if initial state is intermediate, it will set it to checked and if it is checked it will set it to un-checked.
Syntax : checkbox.nextCheckState() Argument : It takes no argument. Action performed : It will change the state of check box according to the previous state.
Below is the implementation.
Python3
# 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 the check-box checkbox = QCheckBox( 'Geek ?' , self ) # setting geometry of check box checkbox.setGeometry( 200 , 150 , 100 , 40 ) # making it tristate check box checkbox.setTristate( True ) # setting check box to its next state checkbox.nextCheckState() # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App. exec ()) |
Output :