QTableView How to select multiple columns programmatically

Question

I'm trying to select two columns of QTableView in code. Unfortunatelly, when I call

tableView->selectColumn(1)
tableView->selectColumn(2)

it selects 1st column, deselects 1st column and selects 2nd column. Is it possible to select multiple columns in code?

Answer 1

If you just need to ensure to allow the user to select multiple columns, you need to set up the proper selection mode as follows:

tableView->setSelectionMode(QAbstractItemView::MultiSelection);

If you would like to do this programatically, this is the way of doing it:

QModelIndexList itemSelection = tableView->selectionModel()->selectedColumns();
int currentColumn = itemSelection.first().column();
QItemSelection selectedItems = tableView->selectionModel()->selection();

tableView->selectColumn(1);
selectedItems.merge(tableView->selectionModel()->selection(), QItemSelectionModel::Select);
tableView->selectColumn(2);
selectedItems.merge(tableView->selectionModel()->selection(), QItemSelectionModel::Select);

tableView->selectionModel()->clearSelection();
tableView->selectionModel()->select(selectedItems, QItemSelectionModel::Select);

Disclaimer: the code has been taken from here, and then modified to suit your need.

Answer 2

selectionModel.select() in its select columns mode may be preferable.

In PyQt:

columns = [1,2,3]
indexes = [model.index(0, c) for c in columns]
mode = QtCore.QItemSelectionModel.Select | QtCore.QItemSelectionModel.Columns
[tableView.selectionModel().select(index, mode) for i in indexes]