Method data

Modules/SegmentationUI/src/QmitkMultiLabelTreeModel.cpp:319–503

}

QVariant QmitkMultiLabelTreeModel::data(const QModelIndex &index, int role) const
{
  if (!index.isValid())
    return QVariant();

  auto item = static_cast<QmitkMultiLabelSegTreeItem*>(index.internalPointer());

  if (!item)
    return QVariant();

  // Safe guard: avoid accessing segmentation state mid-update
  if (m_ModelUpdateOngoing)
  {
    switch (role)
    {
    case Qt::DisplayRole:
    case Qt::EditRole:
    case Qt::DecorationRole:
      return QVariant();      // benign safe fallback
    default:
      break;
    }
  }

  if (role == Qt::DisplayRole||role == Qt::EditRole)
  {
    if (TableColumns::NAME_COL == index.column())
    {
      switch (item->m_ItemType)
      {
        case QmitkMultiLabelSegTreeItem::ItemType::Group:
        {
          const auto groupID = item->GetGroupID();
          if (m_Segmentation->ExistGroup(groupID))
          {
            return QVariant(QString::fromStdString(mitk::LabelSetImageHelper::CreateDisplayGroupName(m_Segmentation, groupID)));
          }
          return QVariant(QString("unknown group"));
        }

        case QmitkMultiLabelSegTreeItem::ItemType::Label:
        {
          auto label = item->GetLabel();

          if (nullptr == label)
            mitkThrow() << "Invalid internal state. QmitkMultiLabelTreeModel currentItem is referring to a label that does not exist.";

          QString name = QString::fromStdString(label->GetName());

          if (!item->HandleAsInstance())
            name = name + QString(" (%1 instances)").arg(item->m_childItems.size());

          return QVariant(name);
        }

        case QmitkMultiLabelSegTreeItem::ItemType::Instance:
        {
          auto label = item->GetLabel();