copy table to Excel

[Arend]

If I try Ctrl+A, Ctrl+C & Ctrl+V only the first value is copied.
I want to select columns and with Ctrl+C and Ctrl+V have a copy in Excel.
Below what I have tried so far.

Regards,
Arend

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    table = new QTableView();
    model = new QStandardItemModel(10,2,this);
 
    connect (table, SIGNAL(clicked(QModelIndex)), this, SLOT(copy()));
 
    model->setHorizontalHeaderItem(0, new QStandardItem("Column_1"));
    for(size_t i=0;i<10;++i)
    {
        QModelIndex index = model -> index(i,0,QModelIndex());
        model->setData(index,QString::number(i+1,'f',0));
    }
    model->setHorizontalHeaderItem(1, new QStandardItem("Column_2"));
    for(size_t i=0;i<10;++i)
    {
        QModelIndex index = model -> index(i,1,QModelIndex());
        model->setData(index,QString::number((i+1)*(i+1),'f',0));
    }
    table->setModel(model);
    ui->tableView->setModel(model);
}
 
void MainWindow::copy()
{
    QStringList list;
    foreach (const QModelIndex& index, table->selectedIndexes() )
    {
        list << index.data() ;
    }
    clipboard->setText(list.join(", "));
}

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    table = new QTableView();
    model = new QStandardItemModel(10,2,this);

    connect (table, SIGNAL(clicked(QModelIndex)), this, SLOT(copy()));

    model->setHorizontalHeaderItem(0, new QStandardItem("Column_1"));
    for(size_t i=0;i<10;++i)
    {
        QModelIndex index = model -> index(i,0,QModelIndex());
        model->setData(index,QString::number(i+1,'f',0));
    }
    model->setHorizontalHeaderItem(1, new QStandardItem("Column_2"));
    for(size_t i=0;i<10;++i)
    {
        QModelIndex index = model -> index(i,1,QModelIndex());
        model->setData(index,QString::number((i+1)*(i+1),'f',0));
    }
    table->setModel(model);
    ui->tableView->setModel(model);
}

void MainWindow::copy()
{
    QStringList list;
    foreach (const QModelIndex& index, table->selectedIndexes() )
    {
        list << index.data() ;
    }
    clipboard->setText(list.join(", "));
}

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