Method OnModelChanged

Modules/SegmentationUI/src/QmitkMultiLabelInspector.cpp:291–331

}

void QmitkMultiLabelInspector::OnModelChanged()
{
  if (!m_ModelManipulationOngoing)
  { //the model was changed externally and not by this instance
    //ensure that selection state is still valid
    //If this instance is manipulating it, it will take care of direct selection directly

    QmitkMultiLabelInspector::LabelValueVectorType validLabels;

    if (m_CheckSelectionDueToExternalModelChange)
    { //selection model tried an update while label model was still updating.
      //check selection now for validity and use it if appropriated.
      m_CheckSelectionDueToExternalModelChange = false;
      validLabels = FilterValidLabels(GetSelectedLabelsFromSelectionModel(), this->GetMultiLabelSegmentation());
    }

    if (validLabels.empty())
    {
      //empty selections are not allowed by UI interactions, there should always be at least one valid label selected.
      //but selections are e.g. also cleared if the model is updated (e.g. due to addition of labels).
      //In this case all valid elements of m_LastValidSelectedLabels should be used.
      validLabels = FilterValidLabels(m_LastValidSelectedLabels, this->GetMultiLabelSegmentation());
    }

    if (validLabels.empty() && m_Model->GetNearestLabelValueToLastChange() != mitk::MultiLabelSegmentation::UNLABELED_VALUE)
    {
      //we use the nearest existing label as valid value, like we do it in DeletLabelInternal
      validLabels = { m_Model->GetNearestLabelValueToLastChange() };
    }

    if (!validLabels.empty())
    {
      UpdateSelectionModel(validLabels);
    }
    else
    {
      m_LastValidSelectedLabels = {};
      emit CurrentSelectionChanged(GetSelectedLabels());
    }
  }
}

void QmitkMultiLabelInspector::OnDataChanged(const QModelIndex& topLeft, const QModelIndex& /*bottomRight*/,
  const QList<int>& /*roles*/)