void tst_QColumnView::swapPreview()
{
    // swap the preview widget in updatePreviewWidget
    QColumnView view;
    QStringList sl;
    sl << QLatin1String("test");
    QStringListModel model(sl);
    view.setModel(&model);
    view.setCurrentIndex(view.indexAt(QPoint(1, 1)));
    connect(&view, SIGNAL(updatePreviewWidget(const QModelIndex &)),
            this, SLOT(setPreviewWidget()));
    view.setCurrentIndex(view.indexAt(QPoint(1, 1)));
    QTest::qWait(ANIMATION_DELAY);
    qApp->processEvents();
}
void tst_QColumnView::indexAt()
{
    QColumnView view;
    QCOMPARE(view.indexAt(QPoint(0,0)), QModelIndex());
    QDirModel model;
    view.setModel(&model);

    QModelIndex home = model.index(QDir::homePath());
    QModelIndex homeFile = model.index(0, 0, home);
    if (!homeFile.isValid())
        return;
    view.setRootIndex(home);
    QRect rect = view.visualRect(QModelIndex());
    QVERIFY(!rect.isValid());
    rect = view.visualRect(homeFile);
    QVERIFY(rect.isValid());

    QModelIndex child;
    for (int i = 0; i < model.rowCount(home); ++i) {
        child = model.index(i, 0, home);
        rect = view.visualRect(child);
        QVERIFY(rect.isValid());
        if (i > 0)
            QVERIFY(rect.top() > 0);
        QCOMPARE(view.indexAt(rect.center()), child);

        view.selectionModel()->select(child, QItemSelectionModel::SelectCurrent);
        view.setCurrentIndex(child);
        qApp->processEvents();
        QTest::qWait(200);

        // test that the second row doesn't start at 0
        if (model.rowCount(child) > 0) {
            child = model.index(0, 0, child);
            QVERIFY(child.isValid());
            rect = view.visualRect(child);
            QVERIFY(rect.isValid());
            QVERIFY(rect.left() > 0);
            QCOMPARE(view.indexAt(rect.center()), child);
            break;
        }
    }
}