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()) |
Output :
