[PyQt] Public QAbstractItemModel methods (wrongfully?) made private in QAbstract(Table|List)Model?

[Florian Bruhin]

* Elvis Stansvik <elvstone at gmail.com> [2016-06-02 10:36:32 +0200]:
> Hi all,
> 
> From qabstractitemmodel.sip:
> 
> In the declaration of QAbstractTableModel:
> 
> private:
>     ...
>     virtual QModelIndex parent(const QModelIndex &child) const;
>     virtual bool hasChildren(const QModelIndex &parent) const;
> 
> and in the declaration of QAbstractListModel:
> 
> private:
>     ...
>     virtual QModelIndex parent(const QModelIndex &child) const;
>     virtual int columnCount(const QModelIndex &parent) const;
>     virtual bool hasChildren(const QModelIndex &parent) const;
> 
> But these are all public functions in C++, and part of the public
> abstract item model API.

No, they are private in C++ as well:
https://github.com/qtproject/qtbase/blob/dev/src/corelib/itemmodels/qabstractitemmodel.h#L381-L384
https://github.com/qtproject/qtbase/blob/dev/src/corelib/itemmodels/qabstractitemmodel.h#L407-L411

I guess the rationale is that it makes no sense to ask e.g. how many
columns a list has?

> This leads to things like:
> 
> [estan at pyret ~]$ cat test.py
> from PyQt5.QtCore import QStringListModel
> model = QStringListModel()
> model.hasChildren()
> [estan at pyret ~]$ python test.py
> Traceback (most recent call last):
>   File "test.py", line 3, in <module>
>     model.hasChildren()
> TypeError: QAbstractListModel.hasChildren() is a private method
> 
> while the same works fine in C++.

It does not for me:

test.cpp: In function 'int main(int, char**)':
test.cpp:17:25: error: 'virtual bool QAbstractListModel::hasChildren(const QModelIndex&) const' is private within this context
     qsl->hasChildren(idx);

Florian

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