Method RemoveGroup

Modules/Multilabel/src/mitkLabelSetImage.cpp:268–315

}

void mitk::MultiLabelSegmentation::RemoveGroup(GroupIndexType indexToDelete)
{
  if (!this->ExistGroup(indexToDelete)) mitkThrow() << "Cannot remove group. Group does not exist. Invalid group index: "<<indexToDelete;

  auto relevantLabels = m_GroupToLabelMap[indexToDelete];

  {
    std::lock_guard<std::shared_mutex> guard(m_LabelNGroupMapsMutex);
    // remove labels of group
    for (auto labelValue : relevantLabels)
    {
      auto label = m_LabelMap[labelValue];
      this->ReleaseLabel(label);
      m_LabelToGroupMap.erase(labelValue);
      m_LabelMap.erase(labelValue);
      this->InvokeEvent(LabelRemovedEvent(labelValue));
    }

    // remove the group entries in the maps and the image.
    m_Groups.erase(m_Groups.begin() + indexToDelete);
    m_GroupToLabelMap.erase(m_GroupToLabelMap.begin() + indexToDelete);
    m_GroupContainer.erase(m_GroupContainer.begin() + indexToDelete);

    //update old indexes in m_LabelToGroupMap to new group indexes
    for (auto& element : m_LabelToGroupMap)
    {
      if (element.second > indexToDelete) element.second = element.second - 1;
    }
  }


  if (!this->ExistLabel(m_ActiveLabelValue))
  {
    //the current active label was removed with the group. Set active label to the first defined label
    if (!m_LabelMap.empty())
    {
      m_ActiveLabelValue = m_LabelMap.begin()->first;
    }
    else
    {
      m_ActiveLabelValue = MultiLabelSegmentation::UNLABELED_VALUE;
    }
  }

  this->InvokeEvent(LabelsChangedEvent(relevantLabels));
  this->InvokeEvent(GroupRemovedEvent(indexToDelete));
  this->Modified();
}

mitk::MultiLabelSegmentation::LabelValueVectorType mitk::MultiLabelSegmentation::ExtractLabelValuesFromLabelVector(const LabelVectorType& labels)
{