Items are not sorted in a tree view in Qt

Question

There is a very simple tree model example in Qt document. I added a line

view.setSortingEnabled(true);

in main.cpp to enable the tree view sorting. When I run it, I see a sorting indicator in the header. However, no matter how I click the header, the items are not sorted. Is there anything I ignored?

Answer 1

Use QSortFilterProxyModel with your view.
The view's sortingEnabled property enables the sort buttons in the view. However the actual sorting needs to be implemented in the model's sort() method.
Use QSortFilterProxyModel like this:

QSortFilterProxyModel* pProxyModel = new QSortFilterProxyModel(pView);
pProxyModel->setSourceModel(pModel);
pView->setModel(pMdl);
pView->setSortingEnabled(true);