Selecting a row in QTreeView programmatically

Question

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?

I'm assuming that `selection` is a [QItemSelectionModel](http://doc.qt.io/qt-5/qitemselectionmodel.html). — altendky, Aug 11 '16 at 12:21
@ssc My guess is that `selection` is `treeview->selectionModel()`. — Donald Duck, Aug 27 '18 at 16:14

score 31 · Answer 1 · edited Jan 30 '16 at 02:52

31

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);

edited Jan 30 '16 at 02:52

Phlucious

3,704
28
61

answered Apr 09 '12 at 14:38

alex

311
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3
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4

You could also use `QItemSelectionModel::ClearAndSelect` instead of `QItemSelectionModel::Select` to clear selection automtically before to select. – Gojir4 Nov 26 '15 at 15:42
This answer is far superior because of the simplicity of `QItemSelectionModel::Rows`. Editing answer to include the comment's suggestion. – Phlucious Jan 30 '16 at 01:21

score 12 · Accepted Answer · answered Feb 11 '11 at 10:55

12

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)

answered Feb 11 '11 at 10:55

Elmar de Koning

519
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Trying your solution. PS. Already had the SelectRows behavior set (as told on second line of question) – the JinX Feb 11 '11 at 10:57

Selecting a row in QTreeView programmatically

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