Method RemoveGroupInternal

Modules/SegmentationUI/src/QmitkMultiLabelInspector.cpp:839–898

}

void QmitkMultiLabelInspector::RemoveGroupInternal(const mitk::MultiLabelSegmentation::GroupIndexType& groupID)
{
  if (!m_AllowLabelModification)
    mitkThrow() << "QmitkMultiLabelInspector is configured incorrectly. Set AllowLabelModification to true to allow the usage of RemoveLabel.";

  if (m_Segmentation.IsNull())
    return;

  if (m_Segmentation->GetNumberOfGroups() < 2)
    return;

  try
  {
    this->WaitCursorOn();
    mitk::SegGroupRemoveUndoRedoHelper undoRedoGenerator(m_Segmentation, { groupID });
    auto deletedGroupName = mitk::LabelSetImageHelper::CreateDisplayGroupName(m_Segmentation, groupID);

    m_ModelManipulationOngoing = true;
    m_Segmentation->RemoveGroup(groupID);
    m_ModelManipulationOngoing = false;

    undoRedoGenerator.RegisterUndoRedoOperationEvent("Remove group \"" + deletedGroupName + "\"");
    this->WaitCursorOff();
  }
  catch (mitk::Exception& e)
  {
    m_ModelManipulationOngoing = false;
    this->WaitCursorOff();
    MITK_ERROR << "Exception caught: " << e.GetDescription();
    QMessageBox::information(this, "Delete group", "Could not delete the currently active group. See error log for details.");
    return;
  }

  auto validSelectedLabels = FilterValidLabels(m_LastValidSelectedLabels, this->GetMultiLabelSegmentation());
  if (validSelectedLabels.empty())
  {
    auto newLabelValue = m_Model->GetNearestLabelValueToLastChange();
    if (newLabelValue != mitk::MultiLabelSegmentation::UNLABELED_VALUE)
    {
      this->SetSelectedLabel(newLabelValue);

      auto index = m_Model->indexOfLabel(newLabelValue); //we have to get index again, because it could have changed due to remove operation.
      if (index.isValid())
      {
        m_Controls->view->expand(index.parent());
      }
      else
      {
        mitkThrow() << "Segmentation or QmitkMultiLabelTreeModel is in an invalid state. Label is not present in the model after adding it to the segmentation. Label value: " << newLabelValue;
      }
    }
    else
    {
      this->SetSelectedLabels({});
    }
  }

  emit ModelUpdated();