Method AddNodeInternal

Modules/QtWidgets/src/QmitkRenderWindowDataStorageTreeModel.cpp:483–538

}

void QmitkRenderWindowDataStorageTreeModel::AddNodeInternal(const mitk::DataNode* dataNode, const mitk::BaseRenderer* renderer)
{
  if (nullptr == dataNode
   || m_DataStorage.IsExpired()
   || nullptr != m_Root->Find(dataNode))
  {
    return;
  }

  // find out if we have a root node
  auto parentItem = m_Root;
  QModelIndex index;
  auto parentDataNode = GetParentNode(dataNode);

  if (nullptr != parentDataNode) // no top level data node
  {
    parentItem = m_Root->Find(parentDataNode);
    if (nullptr == parentItem)
    {
      // parent node not contained in the tree; add it
      NodeAdded(parentDataNode);
      parentItem = m_Root->Find(parentDataNode);
      if (nullptr == parentItem)
      {
        // could not find and add the parent tree; abort
        return;
      }
    }

    // get the index of this parent with the help of the grand parent
    index = createIndex(parentItem->GetIndex(), 0, parentItem);
  }

  int firstRowWithASiblingBelow = 0;
  int nodeLayer = -1;
  dataNode->GetIntProperty("layer", nodeLayer, renderer);
  for (const auto& siblingItem : parentItem->GetChildren())
  {
    int siblingLayer = -1;
    auto siblingNode = siblingItem->GetDataNode();
    if (nullptr != siblingNode)
    {
      siblingNode->GetIntProperty("layer", siblingLayer, renderer);
    }
    if (nodeLayer > siblingLayer)
    {
      break;
    }
    ++firstRowWithASiblingBelow;
  }

  beginInsertRows(index, firstRowWithASiblingBelow, firstRowWithASiblingBelow);
  auto newNode = new QmitkDataStorageTreeModelInternalItem(const_cast<mitk::DataNode*>(dataNode));
  parentItem->InsertChild(newNode, firstRowWithASiblingBelow);
  endInsertRows();
}

void QmitkRenderWindowDataStorageTreeModel::RemoveNodeInternal(const mitk::DataNode* dataNode)