Selecting a row in QTreeView programmatically

问题

I have a QTreeView with QFileSystemModel as model.

The QTreeView has SelectionBehavior set to SelectRows.

In my code I read a dataset to select and then select them via:

idx = treeview->model()->index(search); 
selection->select(idx, QItemSelectionModel::Select);

This selects a cell, not the row . .

Have added a stupid workaround, but would rather fix this the correct way.

for (int col=0; col< treeview->model()->columnCount(); col++) 
{ 
   idx = treeview->model()->index(search, col); 
   selection->select(idx, QItemSelectionModel::Select); 
} 

Or is that ^^ the only way to do it?

回答1:

You can also select an entire row using an QItemSelection:

selection->select (
    QItemSelection (
        treeview->model ()->index (search, 0),
        treeview->model ()->index (search, treeview->model ()->columnCount () - 1)),
    QItemSelectionModel::Select);

Also if you also want row selection for user clicks you need to set the selection behavior:

treeview->setSelectionBehavior (QAbstractItemView::SelectRows)

回答2:

If you want to select a full row, you should use the following:

selection->select(idx, QItemSelectionModel::Select | QItemSelectionModel::Rows);

Note that you may sometimes first want to clear the selection:

selection->select(idx, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);

来源：https://stackoverflow.com/questions/4967660/selecting-a-row-in-qtreeview-programmatically