Question

Currently I want to update row items in a QStandardItemModel without losing the sort order and row selection in the respective QTableView.

I have tested two approaches:

1. Clearing the model by clear() and re-adding the rows “destroys” everything including headers.
2. Removing and re-adding all rows keeps the headers, but still “destroys” selection and sort order.

I could try to manually to a) remove all rows no longer required and then b) update the items of the changed rows. But is there no easier way?

Answer 1

I don’t know, how you sorted your data before the update, but please take a look at the QTableView’s sortByColumn() function.

As for the selection, if it still keeps disappearing, you can manually put back your selection, where it should be by:

// You access the selected index when the editing starts
QModelIndex index = table->selectionModel()->currentIndex();

//Later when you finished editing, you can select it again
table->selectionModel()->select(index, QItemSelectionModel::Select);

More about this:

• QItemSelectionModel
• QTableView