Method restoreConnection

QtNodeEditor/src/FlowScene.cpp:135–189

std::shared_ptr<Connection>
FlowScene::
restoreConnection(QJsonObject const &connectionJson)
{
  QUuid nodeInId  = QUuid(connectionJson["in_id"].toString());
  QUuid nodeOutId = QUuid(connectionJson["out_id"].toString());

  PortIndex portIndexIn  = connectionJson["in_index"].toInt();
  PortIndex portIndexOut = connectionJson["out_index"].toInt();

  auto nodeIn  = _nodes[nodeInId].get();
  auto nodeOut = _nodes[nodeOutId].get();

  auto getConverter = [&]()
  {
    QJsonValue converterVal = connectionJson["converter"];

    if (!converterVal.isUndefined())
    {
      QJsonObject converterJson = converterVal.toObject();

      NodeDataType inType { converterJson["in"].toObject()["id"].toString(),
                            converterJson["in"].toObject()["name"].toString() };

      NodeDataType outType { converterJson["out"].toObject()["id"].toString(),
                             converterJson["out"].toObject()["name"].toString() };

      auto converter  =
        registry().getTypeConverter(outType, inType);

      if (converter)
        return converter;
    }

    return TypeConverter{};
  };

  if( !nodeIn || !nodeOut)
  {
      qDebug() << "ERROR: invalid connection with UIDS "
               << nodeInId << " and " << nodeOutId;

      return std::shared_ptr<Connection>();
  }

  std::shared_ptr<Connection> connection =
    createConnection(*nodeIn, portIndexIn,
                     *nodeOut, portIndexOut,
                     getConverter());

  connectionCreated(*connection);

  connection->connectionGeometry().setPortLayout( layout() );
  return connection;
}


void