[Qt-interest] QAIM::headerData() is not tied to QModelIndex?

[Kishore]

On Monday 16 Aug 2010 12:39:52 am Andreas Pakulat wrote:
> On 15.08.10 18:01:20, Kishore wrote:
> > Why does the headerData() take section parameter and not a QModelIndex?
> > 
> > I know this is not how QAbstractItemModel is commonly used but QAIM is
> > designed in such a way that every modelindex can again have children and
> > so on... ie. there can be a table within a table. So essentially, in a
> > tree like structure, a child can have more columns than a parent and
> > with a really different set of headerData as well. A more relevant API
> > would be something like:
> > 
> > QAIM::headerData ( const QModelIndex &index, Qt::Orientation orientation,
> > int role = Qt::DisplayRole ) const
> > 
> > just the way it is currently with columnCount().
> 
> This doesn't really make sense display-wise. The header is global so you
> cannot have different strings 

display-wise, it does not make sense for columnCount either. Still it exists.

As such, IMHO hierarchy in anything other than the first column does not make 
much sense display-wise.

> anyway depending on some row information.
> Thats for existing views. You can of course write your own view who uses
> a special data role with data() to fetch the header information.

Yes. There are workarounds. Since, I am dealing with my custom model and my 
own view, i can implement a headerData like mentioned above. But i am trying 
to learn more about the MVC architecture.
-- 
Cheers!
Kishore