Mercury13

class AddItem : public QWidget
{
public:
  AddItem(QWidget* aParent, QList<Institution>& aInstitutions)
      : QWidget(aParent), institutions(aInstitutions) {}
private:
  QList<Institution>& institutions;
};

class AddItem : public QDialog
{
public:
  int exec(QList<Institution>& aInstitutions);
private:
  QList<Institution> institutions;
};

int AddItem::exec(QList<Institution>& aInstitutions)
{
  institutions = aInstitutions;
  int r = QDialog::exec();
  if (r) {
     aInstitutions = std::move(institutions);
  }
  return r;
}

[r']   ( 1 0 0 shiftx )   [r]
[s'] = ( 0 1 0 shifty ) · [s]
[t']   ( 0 0 1 shiftz )   [t]
[d']   ( 0 0 0 1      )   [d]

QWidget* LineEditDelegate::createEditor(
        QWidget* parent,
        const QStyleOptionViewItem& option,
        const QModelIndex&) const
{
    QLineEdit* edit = new QLineEdit(parent);
    edit->setLocale(option.locale);   // важно! — локаль потом потребуется
    return edit;
}

void LineEditDelegate::setEditorData(
        QWidget* editor,
        const QModelIndex & index) const
{
    QLineEdit* currEdit = dynamic_cast(editor);
    QVariant var = index.model()->data(index);
    QString text = displayText(var, editor->locale());
    currEdit->setText(text);
}

QModelIndex EditableTable::moveCursor(
        CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
{
    switch (cursorAction) {
    case QAbstractItemView::MoveNext:
    case QAbstractItemView::MovePrevious:
        return QModelIndex();
        break;
    default:
        return Super::moveCursor(cursorAction, modifiers);
    }
}