Scrolling hint PositionAtBottom not working as expected

Phil K

Using a table view or a table widget, I cannot seem to scrollTo an item index such that the row is placed at the bottom of the viewport. Is there a workaround I can use?

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
    const int kRows = 100;
    QHBoxLayout *layout = new QHBoxLayout();
    QWidget *central = new QWidget();
    table = new QTableWidget(kRows, 1);
    table->verticalHeader()->setVisible(false);
    QTableWidgetItem *header = new QTableWidgetItem("ROWS");
    table->setHorizontalHeaderItem(0, header);
    for (int i = 0; i < kRows; ++i) {
        QTableWidgetItem *item = new QTableWidgetItem(QString("row %1").arg(i));
        table->setItem(i, 0, item);
    }
    layout->addWidget(table);
    central->setLayout(layout);
    setCentralWidget(central);
    setMinimumHeight(305);
    table->resizeRowsToContents();
    QModelIndex index = table->model()->index(50, 0);
    // this line below does not move row 50 to the bottom
    table->scrollTo(index, QAbstractItemView::PositionAtBottom);
}

Positioning an item using the top hint works as expected, i.e. that row appears at the top of the viewport.

table->scrollTo(index, QAbstractItemView::PositionAtTop);

SGaist

Hi,

What if you trigger the scrollTo after your widget has been shown ?

Phil K

@SGaist Yes, much better, thanks! I should have had that intution on visibility -- live and learn. Marking as resolved. -Phil

void MainWindow::showEvent(QShowEvent *event)
{
    QMainWindow::showEvent(event);
    QModelIndex index = table->model()->index(50, 0);
    table->scrollTo(index, QAbstractItemView::PositionAtBottom);
}

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