QTableView spanned cells selection

[Alexey Serebryakov]

Hi guys,
let's me see small example

#include <QApplication>
#include <QTableView>
#include <QLayout>
#include <QStandardItemModel>
#include <QHeaderView>

int main (int argc, char **argv)
{
    QApplication app (argc, argv);

    QWidget *window = new QWidget();
    QTableView *view = new QTableView();

    QStandardItemModel *model = new QStandardItemModel (4, 3, window);

    model->setData(model->index(0, 0), QVariant("A"));
    model->setData(model->index(1, 0), QVariant("B"));
    model->setData(model->index(2, 0), QVariant("C"));
    model->setData(model->index(3, 0), QVariant("D"));

    model->setData(model->index(0, 1), QVariant("a"));
    model->setData(model->index(1, 1), QVariant("b"));
    model->setData(model->index(2, 1), QVariant("c"));
    model->setData(model->index(3, 1), QVariant("d"));

    model->setData(model->index(0, 2), QVariant("1"));
    model->setData(model->index(1, 2), QVariant("1"));
    model->setData(model->index(2, 2), QVariant("3"));
    model->setData(model->index(3, 2), QVariant("4"));

    view->setSelectionBehavior(QAbstractItemView::SelectRows);
    view->setSelectionMode(QAbstractItemView::ExtendedSelection);

    view->setSpan(0, 2, 2, 1);

    view->setModel(model);

    QVBoxLayout *vblTop = new QVBoxLayout();
    vblTop->setMargin(5);
    vblTop->setSpacing(10);
    vblTop->setAlignment(Qt::AlignTop);

    vblTop->addWidget(view);

    window->setLayout(vblTop);
    window->show();

    return app.exec();

}

Please help me.
I need when the user clicked on spanned cell then select ALL corresponding rows(cells).

• If user clicked: A, a, 1, B, b (1 and 2 rows) make selection rows 1 and 2
  

• If user clicked C, c, 3 then select only 3 row, and if user clicked D, d, 4 then select only 4 row.

1. Subclass QTableView? And handle selectedIndexes, selectionChanged, currentChanged?
2. Change selection mode and behaviour?

Thanks a lot,
Alex.

[SGaist]

Hi,

A custom QItemSelectionModel would likely be the way to go.

[Alexey Serebryakov]

@SGaist seems to me that is complex way. I think there would be more simple. :-(
I'm not found any references on how to subclass QItemSelectionModel.
That is strange, I think that is very popular feature of QTableView widget. :-(

[SGaist]

From your description, it seems you need to reimplement the select method.

[Alexey Serebryakov]

@SGaist Oh thank you so much! That was good idea to subclass QItemSelectionModel. It works in my case.

But I have notice I could not found any useful tutorials or samples about that feature. :-(

[SGaist]

You're welcome !

Well, yours could become one :-)