In this article we will see how we can add a action to the combo box who have check-able items. By default when we create a combo box its items are not check-able i.e we can select any one item at a time although we can create such combo box by editing the combo box class. Below is the representation of how check-able combo box look like.
In order to do this we have to make a new editable combo box class which inherits the combo box and adds a new feature of check able combo box. Below is the syntax of new class and have to add a method when combo box get checked.
# new check-able combo box class CheckableComboBox(QComboBox): # constructor def __init__(self, parent=None): super(CheckableComboBox, self).__init__(parent) self.view().pressed.connect(self.handleItemPressed) self.setModel(QStandardItemModel(self)) count = 0 # action called when item get checked def do_action(self): window.label.setText("Checked number : " +str(self.count)) # when any item get pressed def handleItemPressed(self, index): # getting the item item = self.model().itemFromIndex(index) # checking if item is checked if item.checkState() == Qt.Checked: # making it unchecked item.setCheckState(Qt.Unchecked) # if not checked else: # making the item checked item.setCheckState(Qt.Checked) self.count += 1 # call the action self.do_action()
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
# new check-able combo box class CheckableComboBox(QComboBox):
# constructor
def __init__( self , parent = None ):
super (CheckableComboBox, self ).__init__(parent)
self .view().pressed.connect( self .handleItemPressed)
self .setModel(QStandardItemModel( self ))
count = 0
# action called when item get checked
def do_action( self ):
window.label.setText( "Checked number : " + str ( self .count))
# when any item get pressed
def handleItemPressed( self , index):
# getting the item
item = self .model().itemFromIndex(index)
# checking if item is checked
if item.checkState() = = Qt.Checked:
# making it unchecked
item.setCheckState(Qt.Unchecked)
# if not checked
else :
# making the item checked
item.setCheckState(Qt.Checked)
self .count + = 1
# call the action
self .do_action()
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 a check-able combo box object
self .combo_box = CheckableComboBox( self )
# setting geometry of combo box
self .combo_box.setGeometry( 200 , 150 , 150 , 30 )
# geek list
geek_list = [ "Sayian" , "Super Sayian" , "Super Sayian 2" , "Super Sayian B" ]
# adding list of items to combo box
self .combo_box.addItems(geek_list)
# create label to show to text
self .label = QLabel( "Not checked" , self )
# setting geometry of label
self .label.setGeometry( 200 , 100 , 200 , 30 )
# create pyqt5 app App = QApplication(sys.argv)
# create the instance of our Window window = Window()
window.show() # start the app sys.exit(App. exec ())
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Output :