Use correct overload for `QAbstractItemModel.createIndex`

[demberto]

This is a snippet taken out of my QAbstractItemModel:

class EventItemModel(QAbstractItemModel):
    def __init__(self, events):
        super().__init__()
        self.events = events

    def index(self, row, column, parent=QModelIndex()):
        if not parent.isValid():
            value = self.events[row].value
            print("internalPointer:", value, flush=True)
            return self.createIndex(row, column, value)

        value = parent.internalPointer()
        if isinstance(value, dict):
            key = tuple(value.keys())[row]
            return self.createIndex(row, column, value[key])
        return self.createIndex(row, column, value[row])

    def rowCount(self, parent=QModelIndex()):
        if not parent.isValid():
            return len(self.events)

        print("internalId:", parent.internalId(), flush=True)
        if isinstance((value := parent.internalPointer()), (list, dict)):
            return len(value)

        return 0

Output:

internalPointer: 20.8.0.1377
internalId: 1621061188720
internalPointer: 1377
internalId: 1377
<<< crashed >>>

Notice how the internalPointer and internalId get set to same value when an int is passed to createIndex.

This is due to the 2nd overload of createIndex being called internally. How can I make PySide call the correct overload?

[SGaist]

Hi,

Python not having the concept of pointers, what exactly are you trying to store as internal pointer ?

[demberto]

@SGaist I was originally try to store an integer value obtained from the source model directly (because I was running into refcount issues with internalPointer when using it with Python objects that kept getting GC'd).

Honestly, QAIM has so many shenanigans, I switched to making a wrapper TreeItem class for the QAIM. I can't believe I have spent so much time trying to get just the index() and parent() working. All this just because my source model's children don't remember their parents?