[Qt-interest] EditableTreeMode example crashing with modeltest

[Jan]

Daniel Price schrieb:
> QModelIndex TreeModelAdaptor::index(int row, int column, const QModelIndex &parent) const
> {
>                 if (parent.isValid() && parent.column() != 0)
>                                 return QModelIndex();
> 
>                 ....
> }
> 
> This was copied from the example - the test passes in a valid parent with a non-zero column and gets back an invalid model index, triggering the assert. But my model code is almost identical  to the example.
> 
> Can someone explain this code? Why does the code return the root item in this case?

I suppose because if the column is > 0 it usually should not have a 
parent (and therefore has no valid index) - only a sibling in column 0.

Maybe make sure you provide as much item data as you have columns 
(headers) in the root item

  QVector<QVariant> rootData;
     foreach (QString header, headers)
         rootData << header;

Jan