NodeFlowController<T, C> class

High-performance controller for node flow state management.

This is the main controller for managing nodes, connections, viewport, and interactions in a node flow editor. It uses MobX for reactive state management.

Type Parameters

T: The data type stored in each node
C: The data type stored in each connection (defaults to void for untyped connections)

Example

// Untyped connections (default)
final controller = NodeFlowController<MyNodeData>();

// Typed connections with a sealed class
sealed class EdgeData {}
class HighPriority extends EdgeData {}
class Normal extends EdgeData {}

final controller = NodeFlowController<MyNodeData, EdgeData>(
  connections: [
    Connection<EdgeData>(
      id: 'conn-1',
      sourceNodeId: 'a',
      sourcePortId: 'out',
      targetNodeId: 'b',
      targetPortId: 'in',
      data: HighPriority(),
    ),
  ],
);

Available extensions

Constructors

NodeFlowController({GraphViewport? initialViewport, NodeFlowConfig? config, List<Node<T>>? nodes, List<Connection<C>>? connections}): Creates a new node flow controller.

Properties

activeConnectionIds → Set<String>: Gets IDs of connections involved in current interaction (package-private).
no setter
activeNodeIds → Set<String>: Gets IDs of nodes involved in current interaction (package-private). When dragging a selected node, includes ALL selected nodes.
no setter
autoPan → AutoPanExtension?: Available on NodeFlowController<T, dynamic>, provided by the AutoPanExtensionAccess extension
Gets the autopan extension, or null if not configured.
no setter
behavior → NodeFlowBehavior: The current behavior mode determining what interactions are allowed.
no setter
canvasFocusNode → FocusNode: The focus node for the canvas.
no setter
canvasKey → GlobalKey<State<StatefulWidget>>: Key for the canvas widget, used to convert global coordinates to canvas-local.
final
canvasLocked → bool: Checks if the canvas is locked (pan/zoom disabled) (package-private).
no setter
config → NodeFlowConfig: Gets the controller's configuration settings.
no setter
connectionCount → int: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets the total number of connections in the graph.
no setter
connectionIds → Iterable<String>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all connection IDs in the graph.
no setter
connectionPainter → ConnectionPainter: Gets the connection painter used for rendering and hit-testing connections.
no setter
connections → List<Connection<C>>: Gets all connections in the graph.
no setter
connectionsObservable → ObservableList<Connection<C>>: Gets the connections observable list for reactive UI updates.
no setter
currentPan → ScreenOffset: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the current pan position of the viewport.
no setter
currentZoom → double: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the current zoom level of the viewport.
no setter
debug → DebugExtension?: Available on NodeFlowController<T, dynamic>, provided by the DebugExtensionAccess extension
Gets the debug extension, or null if not configured.
no setter
draggedNodeId → String?: Gets the ID of the node currently being dragged, if any (package-private).
no setter
events → NodeFlowEvents<T, C>: Gets the current events configuration.
no setter
extensions → List<NodeFlowExtension>: Gets all registered extensions.
no setter
hashCode → int: The hash code for this object.
no setterinherited
hasSelection → bool: Checks if there is any active selection (nodes or connections).
no setter
interaction → InteractionState: final
isConnecting → bool: Checks if a connection is currently being created (package-private).
no setter
isConnectionPainterInitialized → bool: Whether the connection painter has been initialized. Use this to guard access to connectionPainter during initialization.
no setter
isDrawingSelection → bool: Checks if a selection rectangle is being drawn (package-private).
no setter
isEditorInitialized → bool: Available on NodeFlowController<T, C>, provided by the EditorInitApi extension
Whether the controller has been initialized for editor use.
no setter
isResizing → bool: Checks if any resize operation is in progress (package-private).
no setter
lod → LodExtension?: Available on NodeFlowController<T, dynamic>, provided by the LodExtensionAccess extension
Gets the Level of Detail (LOD) extension, or null if not configured.
no setter
minimap → MinimapExtension?: Available on NodeFlowController<T, dynamic>, provided by the MinimapExtensionAccess extension
Gets the minimap extension, or null if not configured.
no setter
mousePositionWorld → GraphPosition?: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the current mouse position in graph coordinates.
no setter
nodeCount → int: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets the total number of nodes in the graph.
no setter
nodeIds → Iterable<String>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all node IDs in the graph.
no setter
nodes → Map<String, Node<T>>: Gets all nodes in the graph as a map (package-private).
no setter
nodesBounds → Rect: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Gets the bounding rectangle that encompasses all nodes in the graph.
no setter
nodeShapeBuilder → NodeShape? Function(Node<T> node)?: Gets the node shape builder function.
no setter
nodesObservable → ObservableMap<String, Node<T>>: Gets the nodes observable map for reactive UI updates.
no setter
pointerPosition → ScreenPosition?: Gets the last known pointer position in screen/widget-local coordinates (package-private).
no setter
resizingNodeId → String?: Gets the ID of the node currently being resized (package-private).
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
screenSize → Size: Gets the current screen/canvas size (package-private).
no setter
selectedConnectionIds → Set<String>: Gets the IDs of all currently selected connections (package-private).
no setter
selectedConnectionIdsObservable → ObservableSet<String>: Gets the selected connection IDs observable set for reactive UI updates.
no setter
selectedNodeIds → Set<String>: Gets the IDs of all currently selected nodes.
no setter
selectedNodeIdsObservable → ObservableSet<String>: Gets the selected node IDs observable set for reactive UI updates.
no setter
selectedNodesBounds → GraphRect?: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the bounding rectangle that encompasses all selected nodes in graph coordinates.
no setter
selectionRect → GraphRect?: Gets the current selection rectangle in graph coordinates (package-private).
no setter
selectionStartPoint → GraphPosition?: Gets the starting point of the selection rectangle in graph coordinates (package-private).
no setter
shortcuts ↔ NodeFlowShortcutManager<T>: latefinal
sortedNodes → List<Node<T>>: Gets nodes sorted by z-index (package-private).
no setter
spatialIndex → GraphSpatialIndex<T, C>: Gets the hit tester for spatial queries (package-private).
no setter
stats → StatsExtension?: Available on NodeFlowController<T, dynamic>, provided by the StatsExtensionAccess extension
Gets the stats extension, or null if not configured.
no setter
temporaryConnection → TemporaryConnection?: Gets the temporary connection being created, if any (package-private).
no setter
theme → NodeFlowTheme?: Gets the current theme configuration.
no setter
viewport → GraphViewport: Gets the current viewport state (position and zoom).
no setter
viewportExtent → GraphRect: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the viewport extent as a GraphRect in graph coordinates.
no setter
viewportObservable → Observable<GraphViewport>: Gets the viewport observable for reactive UI updates.
no setter
viewportScreenBounds → ScreenRect: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the viewport extent as a ScreenRect in global screen coordinates.
no setter
visibleConnections → List<Connection<C>>: Gets visible connections (package-private).
no setter
visibleNodes → List<Node<T>>: Gets visible nodes sorted by z-index (package-private).
no setter

Methods

addConnection(Connection<C> connection) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Adds a connection between two ports.
addExtension(NodeFlowExtension extension) → void: Registers an extension with this controller.
addInputPort(String nodeId, Port port) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Adds an input port to an existing node.
addNode(Node<T> node) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Adds a new node to the graph.
addOutputPort(String nodeId, Port port) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Adds an output port to an existing node.
alignNodes(List<String> nodeIds, NodeAlignment alignment) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Aligns multiple nodes according to the specified alignment option.
animateToBounds(GraphRect bounds, {double padding = 50.0, Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to fit a bounding rectangle with padding.
animateToNode(String nodeId, {double? zoom = 1.0, Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to center on a specific node.
animateToNodes(List<String> nodeIds, {double padding = 60.0, Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to show all specified nodes.
animateToPosition(GraphOffset position, {double? zoom, Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to center on a specific position in graph coordinates.
animateToScale(double scale, {Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to a specific zoom level, keeping the center fixed.
animateToViewport(GraphViewport target, {Duration duration = const Duration(milliseconds: 400), Curve curve = Curves.easeInOut}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Animates the viewport to a target state.
arrangeNodesHierarchically() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Arranges nodes hierarchically by type.
arrangeNodesInGrid({double spacing = 150.0}) → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Arranges all nodes in a grid layout.
batch(String reason, void operations()) → void: Wraps multiple operations in a batch.
bringNodeForward(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Moves a node one step forward in the z-order.
bringNodeToFront(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Brings a node to the front of the z-order (renders on top of all other nodes).
cancelConnectionDrag() → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Cancels a connection drag without creating a connection.
cancelNodeDrag(Map<String, Offset> originalPositions) → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Cancels a node drag operation and reverts to original positions.
cancelResize() → void: Available on NodeFlowController<T, C>, provided by the ResizeApi extension
Cancels a resize operation and reverts to original position/size.
canConnect({required String targetNodeId, required String targetPortId, bool skipCustomValidation = false}) → ConnectionValidationResult: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Validates whether a connection can be made from the current drag state to the specified target port.
canStartConnection({required String nodeId, required String portId, required bool isOutput}) → ConnectionValidationResult: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Validates whether a connection can start from the specified port.
centerOn(GraphOffset point) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Centers the viewport on a specific point in graph coordinates without changing zoom.
centerOnNode(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Centers the viewport on a specific node without changing the zoom level.
centerOnNodeWithZoom(String nodeId, {double zoom = 1.0}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Centers the viewport on a node and sets zoom level in one operation.
centerOnSelection() → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Centers the viewport on the center point of all selected nodes without changing zoom.
centerViewport() → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Centers the viewport on the geometric center of all nodes without changing zoom.
clearAnimateToHandler(Object token) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Clears the animation handler only if it was set by the same token.
clearConnectionSelection() → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Clears all connection selections.
clearGraph() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Clears the entire graph, removing all nodes, connections, and selections.
clearNodeSelection() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Clears all node selections.
clearSelection() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Clears all selections (nodes and connections) and exits any active editing mode.
completeConnectionDrag({required String targetNodeId, required String targetPortId}) → Connection<C>?: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Completes a connection drag by creating the connection.
createCommentNode({required Offset position, required String text, required T data, String? id, double width = 200.0, double height = 100.0, Color color = const Color(0xFFFFF59D)}) → CommentNode<T>: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Creates and adds a comment node to the graph.
createConnection(String sourceNodeId, String sourcePortId, String targetNodeId, String targetPortId) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Creates a connection between two ports.
createGroupNode({required String title, required Offset position, required Size size, required T data, String? id, Color color = const Color(0xFF2196F3), GroupBehavior behavior = GroupBehavior.bounds, Set<String>? nodeIds, EdgeInsets padding = kGroupNodeDefaultPadding, List<Port> inputPorts = const [], List<Port> outputPorts = const []}) → GroupNode<T>: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Creates and adds a group node that visually groups multiple nodes.
createGroupNodeAroundNodes({required String title, required Set<String> nodeIds, required T data, String? id, EdgeInsets padding = const EdgeInsets.all(20.0), Color color = const Color(0xFF2196F3), GroupBehavior behavior = GroupBehavior.bounds, List<Port> inputPorts = const [], List<Port> outputPorts = const []}) → GroupNode<T>: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Creates and adds a group node that surrounds the specified nodes.
createSession(DragSessionType type) → DragSession: Creates a drag session for managing drag operation lifecycle.
deleteAllConnectionsForNode(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Deletes all connections associated with a node.
deleteNodes(List<String> nodeIds) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Deletes multiple nodes from the graph.
deleteSelectedWithConfirmation() → Future<void>: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Deletes all selected nodes and connections with lock check and confirmation.
detectCycles() → List<List<String>>: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Detects cycles in the graph using depth-first search.
dispose() → void: Disposes of the controller and releases resources.
distributeNodesHorizontally(List<String> nodeIds) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Distributes nodes evenly along the horizontal axis.
distributeNodesVertically(List<String> nodeIds) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Distributes nodes evenly along the vertical axis.
duplicateNode(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Creates a duplicate of a node and adds it to the graph.
endNodeDrag() → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Ends a node drag operation.
endResize() → void: Available on NodeFlowController<T, C>, provided by the ResizeApi extension
Ends the current resize operation.
exportGraph() → NodeGraph<T, C>: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Exports the current graph state including all nodes, connections, and viewport.
findContainedNodes(GroupNode<T> group) → Set<String>: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Finds all nodes that are completely contained within a group's bounds.
fitSelectedNodes() → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Adjusts the viewport to fit all selected nodes in the view with padding.
fitToView() → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Adjusts the viewport to fit all nodes in the view with padding.
flushPendingSpatialUpdates() → void: Available on NodeFlowController<T, C>, provided by the DirtyTrackingExtension extension
Flushes all pending spatial index updates synchronously.
getConnection(String connectionId) → Connection<C>?: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets a connection by its ID.
getConnectionBounds(String connectionId) → Rect?: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets the bounding rectangle for a connection.
getConnectionPath(String connectionId) → Path?: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets the rendered path for a connection.
getConnectionsForNode(String nodeId) → List<Connection<C>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all connections associated with a node.
getConnectionsFromPort(String nodeId, String portId) → List<Connection<C>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all connections originating from a specific port.
getConnectionsToPort(String nodeId, String portId) → List<Connection<C>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all connections targeting a specific port.
getCycles() → List<List<String>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all cycles in the graph.
getExtension<E extends NodeFlowExtension>() → E?: Gets an extension by its type.
getHiddenConnections() → List<Connection<C>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all hidden connections in the graph.
getHiddenNodes() → List<Node<T>>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all hidden nodes in the graph.
getInputPorts(String nodeId) → List<Port>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all input ports for a node.
getNode(String nodeId) → Node<T>?: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets a node by its ID.
getNodeBounds(String nodeId) → Rect?: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets the bounding rectangle for a specific node.
getNodesByType(String type) → List<Node<T>>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all nodes of a specific type.
getOrphanNodes() → List<Node<T>>: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Gets all nodes that have no connections.
getOutputPorts(String nodeId) → List<Port>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all output ports for a node.
getPort(String nodeId, String portId) → Port?: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets a specific port from a node.
getPortWorldPosition(String nodeId, String portId) → Offset?: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets the world position of a port.
getViewportCenter() → GraphPosition: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Gets the center point of the current viewport in graph coordinates.
getVisibleConnections() → List<Connection<C>>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Gets all visible connections in the graph.
getVisibleNodes() → List<Node<T>>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Gets all visible nodes in the graph.
globalToGraph(ScreenPosition globalPosition) → GraphPosition: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Converts a global screen position to graph coordinates.
graphToScreen(GraphPosition graphPoint) → ScreenPosition: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Converts a graph coordinate point to screen coordinates.
hasCycles() → bool: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Checks if the graph contains any cycles.
hasExtension(String id) → bool: Checks if an extension with the given ID is registered.
hideAllGroupAndCommentNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Hides all GroupNode and CommentNode instances.
hideAllNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Hides all nodes in the graph.
hideSelectedNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Hides all currently selected nodes.
hitTestConnections(Offset graphPosition) → String?: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Tests if a point hits any connection.
hitTestPort(Offset graphPosition) → ({bool isOutput, String nodeId, String portId})?: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Hit test for a port at the given graph position.
initController({required NodeFlowTheme theme, required Size portSizeResolver(Port port), NodeShape? nodeShapeBuilder(Node<T> node)?, bool Function(Connection connection, Offset point)? connectionHitTesterBuilder(ConnectionPainter painter)?, List<Rect> connectionSegmentCalculator(Connection connection)?, NodeFlowEvents<T, C>? events}) → void: Available on NodeFlowController<T, C>, provided by the EditorInitApi extension
Initializes the controller for use with the NodeFlow editor.
invertSelection() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Inverts the current node selection.
isConnectionSelected(String connectionId) → bool: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Checks if a connection is currently selected.
isNodeSelected(String nodeId) → bool: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Checks if a node is currently selected.
isPointVisible(GraphPosition graphPoint) → bool: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Checks if a graph coordinate point is visible in the current viewport.
isRectVisible(GraphRect graphRect) → bool: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Checks if a graph coordinate rectangle intersects with the viewport.
loadGraph(NodeGraph<T, C> graph) → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Loads a complete graph into the controller.
moveNode(String nodeId, Offset delta) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Moves a node by the specified delta.
moveNodeDrag(Offset graphDelta) → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Moves nodes during a drag operation.
moveSelectedNodes(Offset delta) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Moves all selected nodes by the specified delta.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
panBy(ScreenOffset delta) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Pans the viewport by a delta offset.
panToPosition(Offset graphPosition) → void: Available on NodeFlowController<T, dynamic>, provided by the MinimapControllerExtension extension
Pans the viewport to center on the specified graph position.
rebuildAllConnectionSegments() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Rebuilds the entire connection spatial index using accurate path segments.
rebuildConnectionSegmentsForNodes(List<String> nodeIds) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Rebuilds connection spatial index using accurate path segments. Call this after drag ends to restore accurate hit-testing.
removeConnection(String connectionId) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Removes a connection from the graph.
removeExtension(String id) → void: Removes an extension by its ID.
removeNode(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Removes a node from the graph along with all its connections.
removePort(String nodeId, String portId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Removes a port from a node and all connections involving that port.
requestDeleteConnection(String connectionId) → Future<bool>: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Requests deletion of a connection with lock check and confirmation callback.
requestDeleteNode(String nodeId) → Future<bool>: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Requests deletion of a node with lock check and confirmation callback.
resetViewport() → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Resets the viewport to zoom 1.0 and centers on all nodes in the graph.
resolveExtension<E extends NodeFlowExtension>() → E?: Resolves an extension by type.
screenToGraph(ScreenPosition screenPoint) → GraphPosition: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Converts a screen coordinate point to graph coordinates.
selectAllConnections() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Selects all connections in the graph.
selectAllConnections() → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Selects all connections in the graph.
selectAllNodes() → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Selects all selectable nodes in the graph.
selectConnection(String connectionId, {bool toggle = false}) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Selects a connection in the graph.
selectNode(String nodeId, {bool toggle = false}) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Selects a node in the graph.
selectNodes(List<String> nodeIds, {bool toggle = false}) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Selects multiple nodes in the graph.
selectNodesByType(String type) → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Selects all nodes of a specific type.
selectSpecificNodes(List<String> nodeIds) → void: Available on NodeFlowController<T, C>, provided by the GraphApi extension
Selects only the specified nodes, clearing any existing selection.
sendNodeBackward(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Moves a node one step backward in the z-order.
sendNodeToBack(String nodeId) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sends a node to the back of the z-order (renders behind all other nodes).
setAnimateToHandler(void handler(GraphViewport target, {Curve curve, Duration duration})?, {Object? token}) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Sets the handler for viewport animations.
setBehavior(NodeFlowBehavior value) → void: Sets the behavior mode for the canvas.
setMousePositionWorld(GraphPosition? position) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Updates the mouse position in graph coordinates.
setNodePorts(String nodeId, {List<Port>? inputPorts, List<Port>? outputPorts}) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sets the input and/or output ports of a node.
setNodePosition(String nodeId, Offset position) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sets a node's position to an absolute position.
setNodeShapeBuilder(NodeShape? builder(Node<T> node)?) → void: Sets the node shape builder function.
setNodeSize(String nodeId, Size size) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sets the size of a node.
setNodesVisibility(List<String> nodeIds, bool visible) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sets visibility for multiple nodes at once.
setNodeVisibility(String nodeId, bool visible) → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Sets the visibility of a specific node.
setScreenSize(Size size) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Sets the screen size used for viewport calculations.
setViewport(GraphViewport viewport) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Sets the viewport to a specific position and zoom level.
showAllGroupAndCommentNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Shows all GroupNode and CommentNode instances.
showAllNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Shows all nodes in the graph.
showSelectedNodes() → void: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Shows all currently selected nodes.
startConnectionDrag({required String nodeId, required String portId, required bool isOutput, required Offset startPoint, required Rect nodeBounds, Offset? initialScreenPosition}) → ConnectionValidationResult: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Starts a connection drag from a port.
startNodeDrag(String nodeId, {MouseCursor? cursor}) → void: Available on NodeFlowController<T, C>, provided by the NodeFlowControllerAPI extension
Starts a node drag operation.
startResize(String nodeId, ResizeHandle handle, Offset globalPosition) → void: Available on NodeFlowController<T, C>, provided by the ResizeApi extension
Starts a resize operation for any resizable node.
toggleNodeVisibility(String nodeId) → bool?: Available on NodeFlowController<T, C>, provided by the NodeApi extension
Toggles visibility of a specific node.
toString() → String: A string representation of this object.
inherited
updateConnectionDrag({required Offset graphPosition, String? targetNodeId, String? targetPortId, Rect? targetNodeBounds}) → void: Available on NodeFlowController<T, C>, provided by the ConnectionApi extension
Updates a connection drag with the current position.
updateEvents(NodeFlowEvents<T, C> events) → void: Available on NodeFlowController<T, C>, provided by the EditorInitApi extension
Updates the event handlers on an already-initialized controller.
updateNodeShapeBuilder(NodeShape? builder(Node<T> node)?) → void: Available on NodeFlowController<T, C>, provided by the EditorInitApi extension
Updates the node shape builder on an already-initialized controller.
updateResize(Offset globalPosition) → void: Available on NodeFlowController<T, C>, provided by the ResizeApi extension
Updates the size of the currently resizing node during a resize operation.
updateTheme(NodeFlowTheme theme) → void: Available on NodeFlowController<T, C>, provided by the EditorInitApi extension
Updates the theme on an already-initialized controller.
zoomBy(double delta) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Zoom the viewport by a delta value while maintaining the viewport center as the focal point.
zoomTo(double zoom) → void: Available on NodeFlowController<T, C>, provided by the ViewportApi extension
Sets the viewport zoom to a specific value.

Operators

operator ==(Object other) → bool: The equality operator.
inherited