Method setGraphicsObject

QtNodeEditor/src/Connection.cpp:164–197

void
Connection::
setGraphicsObject(std::unique_ptr<ConnectionGraphicsObject>&& graphics)
{
  _connectionGraphicsObject = std::move(graphics);

  // This function is only called when the ConnectionGraphicsObject
  // is newly created. At this moment both end coordinates are (0, 0)
  // in Connection G.O. coordinates. The position of the whole
  // Connection G. O. in scene coordinate system is also (0, 0).
  // By moving the whole object to the Node Port position
  // we position both connection ends correctly.

  if (requiredPort() != PortType::None)
  {

    PortType attachedPort = oppositePort(requiredPort());

    PortIndex attachedPortIndex = getPortIndex(attachedPort);

    auto node = getNode(attachedPort);

    QTransform nodeSceneTransform =
      node->nodeGraphicsObject().sceneTransform();

    QPointF pos = node->nodeGeometry().portScenePosition(attachedPortIndex,
                                                         attachedPort,
                                                         nodeSceneTransform);

    _connectionGraphicsObject->setPos(pos);
  }

  _connectionGraphicsObject->move();
}