loadGraph method

void loadGraph(NodeGraph<T> graph)

Loads a complete graph into the controller.

This method:

1. Clears the existing graph state
2. Bulk loads all nodes and connections
3. Sets the viewport to match the saved state
4. Sets up visual positioning and hit-testing infrastructure (if editor initialized)

This is the preferred method for loading saved graphs as it performs efficient bulk loading rather than individual additions.

Note: If the editor is not yet initialized (i.e., _initController hasn't been called), the infrastructure setup is deferred until initialization. This is the correct behavior for graphs loaded before the editor widget mounts.

Parameters:

• graph: The graph to load containing nodes, connections, and viewport state

Example:

final graph = NodeGraph<MyData>(
  nodes: savedNodes,
  connections: savedConnections,
  viewport: savedViewport,
);
controller.loadGraph(graph);

Implementation

void loadGraph(NodeGraph<T> graph) {
  runInAction(() {
    // Clear existing state
    clearGraph();

    // Bulk load all data structures
    for (final node in graph.nodes) {
      _nodes[node.id] = node;
    }
    _connections.addAll(graph.connections);

    // Set viewport
    _viewport.value = graph.viewport;

    // Set up infrastructure if editor is already initialized.
    // If not initialized yet, _initController will handle this when called.
    if (_editorInitialized) {
      _initializeLoadedNodes();
      _rebuildSpatialIndexes();
    }
  });
}