Map table to tree through model/view possible?

[Davor]

If you ignore the parent, you will never receive a tree model. You also have to return indexes from the proxy model and not from the source model. The only method that can and has to return indexes from the proxy model is mapToSource().

I still fail to grasp what is the effect you want to obtain. Maybe a very simple practical example would clear things up?

Take a table with two columns and two rows and following data:
1,2
3,4

I want to be able to click on “1” so it expands to “2”,
I want to be able to click on “3” so it expands to “4”,

In other words as already stated: each record represents the path of a tree.

[wysota]

Your mapping is very complex (contrary to how it might look). I can't find a mathematical function to map between the two models. I know how the proxy can be implemented to work but it's not trivial. I'm unable to find a trivial solution to the problem and I've been trying for half an hour now. I'm close to coming to a conclusion that there is no deterministic function to map between the two models in Qt's model-view architecture - you always lack one piece of information - the row, column and parent are not enough to do the mapping.