Method MoveNodeUp

Modules/QtWidgets/src/mitkRenderWindowLayerController.cpp:229–274

}

bool mitk::RenderWindowLayerController::MoveNodeUp(DataNode* dataNode, const BaseRenderer* renderer /*= nullptr*/)
{
  if (nullptr == dataNode)
  {
    return false;
  }

  // get the layer stack of the current renderer
  RenderWindowLayerUtilities::LayerStack stackedLayers = RenderWindowLayerUtilities::GetLayerStack(m_DataStorage, renderer);
  if (!stackedLayers.empty())
  {
    // get the current layer value of the given data node
    int currentLayer;
    bool wasFound = dataNode->GetIntProperty("layer", currentLayer, renderer);
    if (wasFound)
    {
      // get the current layer in the map of stacked layers
      RenderWindowLayerUtilities::LayerStack::const_iterator layerStackIterator = stackedLayers.find(currentLayer);
      if (layerStackIterator != stackedLayers.end() && layerStackIterator != stackedLayers.begin())
      {
        // found the element in the map, at different position than 'begin' ->
        // current node is not on the topmost layer and therefore can be moved one layer up
        // swap the layers of the dataNode and the dataNode on the next higher layer (previous map element)
        RenderWindowLayerUtilities::LayerStack::const_iterator prevLayerStackIterator = std::prev(layerStackIterator);
        dataNode->SetIntProperty("layer", prevLayerStackIterator->first, renderer);
        prevLayerStackIterator->second->SetIntProperty("layer", currentLayer, renderer);
        dataNode->Modified();
        if (nullptr == renderer)
        {
          mitk::RenderingManager::GetInstance()->RequestUpdateAll();

        }
        else
        {
          mitk::RenderingManager::GetInstance()->RequestUpdate(renderer->GetRenderWindow());
        }
        return true;
      }
      // else: layer stack does not contain a layer with the 'currentLayer'data node or
      //       layer is already the topmost layer node
    }
    // else: data node has no layer information
  }
  // else: do not work with empty layer stack
  return false;
}

bool mitk::RenderWindowLayerController::MoveNodeDown(DataNode* dataNode, const BaseRenderer* renderer /*= nullptr*/)
{