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
from PyQt5.QtWidgets import QApplication, QComboBox, QMainWindow
from PyQt5.QtWidgets import QWidget, QVBoxLayout
from PyQt5.QtGui import QStandardItemModel
from PyQt5.QtCore import Qt
import sys
# creating checkable combo box class class 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 code if __name__ = = '__main__' :
app = QApplication(sys.argv)
window = Window()
window.show()
window.resize( 480 , 320 )
sys.exit(app.exec_())
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Output :