Qt4: Sorting QAbstractItemVew inherited view

[nando]

Hi everybody,

i have a problem with sorting in my view:

i have implemented my own view (inherited from QAbstractItemView) and my own model (inherited from QAbstractItemModel) and my own Proxy (inherited from QSortFilterProxyModel).

Everything like inserting data, updating and removing data works fine.

Now i want to add sorting, so i reimplemented the proxy's lessThan method.

If i trigger a sort by calling:

pView->model()->sort(colIndex);

i see the proxy's lessThan method is called as expected,

but my view do not update (reorder) its contents.

If i connect a standard QTableView to my proxy and then enable sorting and then click on an cell-header,
i also see the proxy's lessThan method is called

and the table displays the reordered data correctly

so i think i have missed something in my own view implementation, but i don't know what?

Does somebody has done this already?

Greetings,
Nando

[wysota]

Have you reimplemented any other methods than lessThan in your proxy? Do you emit proper signals from the model? Does the view listen for them and refreshes itself according to their contents?

[nando]

Hi,

i think my proxy is fine, because if i use my proxy with a standard QTableView,
then sorting works.

My model emits dataChanged signal and that works fine. So my view gets the updates.

I think maybe i have forgotten to overwrite some methods in my view.
I do not know which methods are called from the (proxy)model if sorting is in progress. dataChanged and currentChanged or rowsRemoved or rowsInserted aren't called.

Do i manually have to connect my view to some slots ?
I thought if i call pView->setModel(pProxy) all these connections are done implicitly (because inserting/removing and updating date works fine) ???

Greetings,
Nando

[wysota]

Hard to say without seeing any code. Maybe you are not connected to layoutChanged() or some other signal...