Method tryConnect

QtNodeEditor/src/NodeConnectionInteraction.cpp:91–136

bool
NodeConnectionInteraction::
tryConnect() const
{
  // 1) Check conditions from 'canConnect'
  PortIndex portIndex = INVALID;

  TypeConverter converter;

  if (!canConnect(portIndex, converter))
  {
    return false;
  }

  // 1.5) If the connection is possible but a type conversion is needed,
  //      assign a convertor to connection
  if (converter)
  {
    _connection->setTypeConverter(converter);
  }

  // 2) Assign node to required port in Connection
  PortType requiredPort = connectionRequiredPort();
  _node->nodeState().setConnection(requiredPort,
                                   portIndex,
                                   *_connection);

  // 3) Assign Connection to empty port in NodeState
  // The port is not longer required after this function
  _connection->setNodeToPort(*_node, requiredPort, portIndex);

  // 4) Adjust Connection geometry

  _node->nodeGraphicsObject().moveConnections();

  // 5) Poke model to intiate data transfer

  auto outNode = _connection->getNode(PortType::Out);
  if (outNode)
  {
    PortIndex outPortIndex = _connection->getPortIndex(PortType::Out);
    outNode->onDataUpdated(outPortIndex);
  }

  return true;
}


/// 1) Node and Connection should be already connected