[Qt-interest] QAbstractProxyModel methods index, parent, rowCount, columnCount not implemented?

[Bo Thorsen]

Den 18-05-2011 12:09, Andre Somers skrev:
> Op Wo, 18 mei, 2011 11:59 am, schreef Stephen Kelly:
>
>>>> It would still be nice if there was a basic
>>>> QAbstractDecoratorProxyModel
>>>> base class that didn't have all the overhead of the
>>>> QSortFilterProxyModel.
>>> Not a bad idea, actually. A proxy model that is geared towards giving a
>>> 1:1 representation of the underlying data structure, but that allows you
>>> to just decorate...
>>> I am not sure if it makes much of a difference though. Is the overhead
>>> of
>>> QSFPM so big?
>>>
>>> André
>>
>> It's called QIdentityProxyModel and it's in Qt 4.8.
>>
>> http://doc.trolltech.com/4.8-snapshot/qidentityproxymodel.html
>>
>> http://steveire.wordpress.com/2010/08/25/kidentityproxymodel-does-nothing-
>> fast/
>>
> Great, I will port my CheckableProxyModel to use it as soon as Qt 4.8 is out.

Nice timing. I was about to write my own class doing pretty much this. 
Also for decorations, where the icons are downloaded from the net. 
Perfect case for this class.

Yes, I could store it directly in the model, but it doesn't belong there 
for this model, and the code was a bit annoying. And delegates don't 
really offer per-row storage. This proxy class is exactly what's needed.

Bo Thorsen,
Fionia Software.

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