pyqt5 -> pyqt6 conversion with overload signal - python-3.x

Question

I am trying to convert from pyqt5 to pyqt6 the code in the first answer of this post but so far no luck.
I managed to have something running with the following code:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from PyQt6.QtWidgets import QApplication
from PyQt6.QtCore import QStringListModel
from PyQt6 import QtCore, QtGui, QtWidgets
from PyQt6.QtCore import Qt, QSortFilterProxyModel
from PyQt6.QtWidgets import QCompleter, QComboBox
import sys
class ExtendedComboBox(QComboBox):
def __init__(self, parent=None):
super(ExtendedComboBox, self).__init__(parent)
self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
self.setEditable(True)
# add a filter model to filter matching items
self.pFilterModel = QSortFilterProxyModel(self)
self.pFilterModel.setFilterCaseSensitivity(Qt.CaseSensitivity.CaseInsensitive)
self.pFilterModel.setSourceModel(self.model())
# add a completer, which uses the filter model
self.completer = QCompleter(self.pFilterModel, self)
# always show all (filtered) completions
self.completer.setCompletionMode(QCompleter.CompletionMode.UnfilteredPopupCompletion)
self.setCompleter(self.completer)
# connect signals
self.lineEdit().textEdited.connect(self.pFilterModel.setFilterFixedString)
self.completer.activated.connect(self.on_completer_activated)
# on selection of an item from the completer, select the corresponding item from combobox
def on_completer_activated(self, text):
if text:
index = self.findText(text)
self.setCurrentIndex(index)
self.activated[str].emit(self.itemText(index))
# on model change, update the models of the filter and completer as well
def setModel(self, model):
super(ExtendedComboBox, self).setModel(model)
self.pFilterModel.setSourceModel(model)
self.completer.setModel(self.pFilterModel)
# on model column change, update the model column of the filter and completer as well
def setModelColumn(self, column):
self.completer.setCompletionColumn(column)
self.pFilterModel.setFilterKeyColumn(column)
super(ExtendedComboBox, self).setModelColumn(column)
if __name__ == "__main__":
app = QApplication(sys.argv)
string_list = ['hola muchachos', 'adios amigos', 'hello world', 'good bye']
combo = ExtendedComboBox()
# either fill the standard model of the combobox
combo.addItems(string_list)
# or use another model
#combo.setModel(QStringListModel(string_list))
combo.resize(300, 40)
combo.show()
sys.exit(app.exec())
However I encounter a strange bug when I start to type something in the ExtendedComboBox(for instance the letter h) and then I click on one of the filtered entries (for example Hello word) I have the following error:
python test.py
Traceback (most recent call last):
File "test.py", line 38, in on_completer_activated
self.activated[str].emit(self.itemText(index))
KeyError: 'there is no matching overloaded signal'
Aborted (core dumped)
The same does not happen in the original version therefore I think that there is something similar in pyqt6 which I cannot figure out

Answer 1

try this:
class ExtendedComboBox(QComboBox):
#lineEdit = LineEdit()
def __init__(self, parent=None):
super(ExtendedComboBox, self).__init__(parent)
self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
self.setEditable(True)
# add a filter model to filter matching items
self.pFilterModel = QSortFilterProxyModel(self)
self.pFilterModel.setFilterCaseSensitivity(Qt.CaseSensitivity.CaseInsensitive)
self.pFilterModel.setSourceModel(self.model())
# add a completer, which uses the filter model
self.completer = QCompleter(self.pFilterModel, self)
# always show all (filtered) completions
self.completer.setCompletionMode(QCompleter.CompletionMode.UnfilteredPopupCompletion)
self.setCompleter(self.completer)
# connect signals
self.lineEdit().textEdited.connect(self.pFilterModel.setFilterFixedString)
self.completer.activated.connect(self.on_completer_activated)
def focusInEvent(self, e):
super().lineEdit().focusInEvent(e)
QTimer.singleShot(0, self.lineEdit().selectAll)
# QTimer.singleShot(0, self.showPopup)
# on selection of an item from the completer, select the corresponding item from combobox
def on_completer_activated(self, text):
if text:
index = self.findText(text)
self.setCurrentIndex(index)
# self.activated[str].emit(self.itemText(index))
# on model change, update the models of the filter and completer as well
def setModel(self, model):
super(ExtendedComboBox, self).setModel(model)
self.pFilterModel.setSourceModel(model)
self.completer.setModel(self.pFilterModel)
# on model column change, update the model column of the filter and completer as well
def setModelColumn(self, column):
self.completer.setCompletionColumn(column)
self.pFilterModel.setFilterKeyColumn(column)
super(ExtendedComboBox, self).setModelColumn(column)