Method getPrevious

src/doc/layer.cpp:45–59

}

Layer* Layer::getPrevious() const
{
  if (m_parent != NULL) {
    LayerConstIterator it =
      std::find(m_parent->getLayerBegin(),
                m_parent->getLayerEnd(), this);

    if (it != m_parent->getLayerEnd() &&
        it != m_parent->getLayerBegin()) {
      it--;
      return *it;
    }
  }
  return NULL;
}

Layer* Layer::getNext() const
{