In this article we will see how we can show the checked items in the text view(line edit) part of the combo box, we know in order to create the checkable items in the combo box we have to create a class of check-able combo box which inherits the combo box class and add the check-able items, but when we check items only the last item user check is visible in the text view part not all the check items are shown.
In order to show the selected items in the text view part, do the following – 1. Inside the check-able combo box class 2. Add function which get called when any item get check 3. Inside that function check which items are checked by iterating all the items 4. Show indexes of all the item to the combo box which are checked
Below is the implementation
Python3
from PyQt5.QtWidgets import QApplication, QComboBox, QMainWindowfrom PyQt5.QtWidgets import QWidget, QVBoxLayoutfrom PyQt5.QtGui import QStandardItemModelfrom PyQt5.QtCore import Qtimport sys# creating checkable combo box classclass CheckableComboBox(QComboBox): def __init__(self): super(CheckableComboBox, self).__init__() self.view().pressed.connect(self.handle_item_pressed) self.setModel(QStandardItemModel(self)) # when any item get pressed def handle_item_pressed(self, index): # getting which item is pressed item = self.model().itemFromIndex(index) # make it check if unchecked and vice-versa if item.checkState() == Qt.Checked: item.setCheckState(Qt.Unchecked) else: item.setCheckState(Qt.Checked) # calling method self.check_items() # method called by check_items def item_checked(self, index): # getting item at index item = self.model().item(index, 0) # return true if checked else false return item.checkState() == Qt.Checked # calling method def check_items(self): # blank list checkedItems = [] # traversing the items for i in range(self.count()): # if item is checked add it to the list if self.item_checked(i): checkedItems.append(i) # call this method self.update_labels(checkedItems) # method to update the label def update_labels(self, item_list): n = '' count = 0 # traversing the list for i in item_list: # if count value is 0 don't add comma if count == 0: n += ' % s' % i # else value is greater than 0 # add comma else: n += ', % s' % i # increment count count += 1 # loop for i in range(self.count()): # getting label text_label = self.model().item(i, 0).text() # default state if text_label.find('-') >= 0: text_label = text_label.split('-')[0] # shows the selected items item_new_text_label = text_label + ' - selected index: ' + n # setting text to combo box self.setItemText(i, item_new_text_label) # flush sys.stdout.flush()class Window(QMainWindow): def __init__(self): super(QMainWindow, self).__init__() # creating a widget object myQWidget = QWidget() # vertical box layout myBoxLayout = QVBoxLayout() myQWidget.setLayout(myBoxLayout) # central widget self.setCentralWidget(myQWidget) # creating checkable combo box self.ComboBox = CheckableComboBox() # traversing items for i in range(3): # adding item self.ComboBox.addItem("Combobox Item " + str(i)) item = self.ComboBox.model().item(i, 0) # setting item unchecked item.setCheckState(Qt.Unchecked) # adding combo box to the layout myBoxLayout.addWidget(self.ComboBox)# drivers codeif __name__ == '__main__': app = QApplication(sys.argv) window = Window() window.show() window.resize(480, 320) sys.exit(app.exec_()) |
Output :
