Listgrid edit only a row - Reformat all rows

Hi, I'm using smartgwt 4.0.

I have created a modal editing listgrid (one row at a time):
listGrid.setCanEdit(true); listGrid.setEditEvent(ListGridEditEvent.CLICK);
listGrid.setModalEditing(true);

When I finalized the row editing (by ENTER), all rows in my grid are formatted (setCellFormatter).

Is there any way to format only editable row? I have a lot of rows, so the performance is down because it reformat all cells in the grid.

Tks.
Alessandro.