[PyKDE] PyQt4 Update

David Boddie david at boddie.org.uk
Tue Dec 6 13:01:03 GMT 2005

On Mon, 5 Dec 2005 16:21:56, Phil Thompson wrote:  
>On Saturday 03 December 2005 6:56 pm, David Boddie wrote: 
>> Just to clarify: subclasses of QAbstractListModel that don't 
>> reimplement columnCount() should automatically inherit the base 
>> class's behaviour and return 1. It seems that the inheritance 
>> mechanism wasn't working correctly for these classes, possibly 
>> because QAbstractListModel implements columnCount() as a private 
>> function. I don't know how SIP deals with this. 
>Are you sure? Doesn't the private implementation effectively block 
>the method from being propagated to more specific classes? 
I think you're correct here. You can't access that method from 
subclasses like QStringListModel. 
>Try and compile: 
> QModelIndex i; 
> QStringListModel m; 
> m.columnCount(i); 
Yes, I was thinking of something like 
  QStringListModel model; 
  qDebug() << ((QAbstractItemModel &)model).columnCount(); 
which returns 1. 
In Python, you can achieve the same thing with 
  model = QStringListModel() 
Since views use the abstract interface to interact with models, 
this syntax isn't too surprising. I just got a little confused 
when thinking about the correct way to get at the column 
information using Python. :-/ 

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