NodeApi<T> extension

Node-related operations for NodeFlowController.

This extension provides comprehensive APIs for working with nodes:

Model APIs

• getNode, getNodeIds, nodeCount - Lookup operations
• addNode, removeNode, duplicateNode, deleteNodes - CRUD operations

Port APIs

• getPort, getPortWorldPosition - Port lookup
• addInputPort, addOutputPort, removePort, setNodePorts - Port CRUD

Visual Query APIs

• getNodeBounds - Node bounds queries (graph bounds are in GraphApi and ViewportApi)
• getVisibleNodes, getHiddenNodes - Visibility queries
• (Graph analysis methods like getOrphanNodes are in GraphApi)

Mutation APIs

• moveNode, moveSelectedNodes, setNodePosition - Position changes
• setNodeSize - Size changes
• setNodeVisibility, toggleNodeVisibility - Visibility changes

Selection APIs

• selectNode, selectNodes, clearNodeSelection - Selection management
• (Bulk selection methods are in GraphApi)

Z-Order APIs

• bringNodeToFront, sendNodeToBack - Extreme positioning
• bringNodeForward, sendNodeBackward - Incremental positioning

Layout APIs

• alignNodes - Alignment operations
• distributeNodesHorizontally, distributeNodesVertically - Distribution

on

• NodeFlowController<T>

Properties

nodeCount → int

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets the total number of nodes in the graph.

no setter

nodeIds → Iterable<String>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all node IDs in the graph.

no setter

Methods

addInputPort(String nodeId, Port port) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Adds an input port to an existing node.

addNode(Node<T> node) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Adds a new node to the graph.

addOutputPort(String nodeId, Port port) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Adds an output port to an existing node.

alignNodes(List<String> nodeIds, NodeAlignment alignment) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Aligns multiple nodes according to the specified alignment option.

bringNodeForward(String nodeId) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Moves a node one step forward in the z-order.

bringNodeToFront(String nodeId) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Brings a node to the front of the z-order (renders on top of all other nodes).

clearNodeSelection() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Clears all node selections.

deleteNodes(List<String> nodeIds) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Deletes multiple nodes from the graph.

distributeNodesHorizontally(List<String> nodeIds) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Distributes nodes evenly along the horizontal axis.

distributeNodesVertically(List<String> nodeIds) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Distributes nodes evenly along the vertical axis.

duplicateNode(String nodeId) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Creates a duplicate of a node and adds it to the graph.

getHiddenNodes() → List<Node<T>>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all hidden nodes in the graph.

getInputPorts(String nodeId) → List<Port>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all input ports for a node.

getNode(String nodeId) → Node<T>?

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets a node by its ID.

getNodeBounds(String nodeId) → Rect?

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets the bounding rectangle for a specific node.

getNodesByType(String type) → List<Node<T>>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all nodes of a specific type.

getOutputPorts(String nodeId) → List<Port>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all output ports for a node.

getPort(String nodeId, String portId) → Port?

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets a specific port from a node.

getPortWorldPosition(String nodeId, String portId) → Offset?

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets the world position of a port.

getVisibleNodes() → List<Node<T>>

Available on NodeFlowController<T>, provided by the NodeApi extension

Gets all visible nodes in the graph.

hideAllNodes() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Hides all nodes in the graph.

hideSelectedNodes() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Hides all currently selected nodes.

isNodeSelected(String nodeId) → bool

Available on NodeFlowController<T>, provided by the NodeApi extension

Checks if a node is currently selected.

moveNode(String nodeId, Offset delta) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Moves a node by the specified delta.

moveSelectedNodes(Offset delta) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Moves all selected nodes by the specified delta.

rebuildAllConnectionSegments() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Rebuilds the entire connection spatial index using accurate path segments.

rebuildConnectionSegmentsForNodes(List<String> nodeIds) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Rebuilds connection spatial index using accurate path segments. Call this after drag ends to restore accurate hit-testing.

removeNode(String nodeId) → void

Available on NodeFlowController<T>, 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>, provided by the NodeApi extension

Removes a port from a node and all connections involving that port.

selectNode(String nodeId, {bool toggle = false}) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Selects a node in the graph.

selectNodes(List<String> nodeIds, {bool toggle = false}) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Selects multiple nodes in the graph.

sendNodeBackward(String nodeId) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Moves a node one step backward in the z-order.

sendNodeToBack(String nodeId) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Sends a node to the back of the z-order (renders behind all other nodes).

setNodePorts(String nodeId, {List<Port>? inputPorts, List<Port>? outputPorts}) → void

Available on NodeFlowController<T>, 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>, provided by the NodeApi extension

Sets a node's position to an absolute position.

setNodeSize(String nodeId, Size size) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Sets the size of a node.

setNodesVisibility(List<String> nodeIds, bool visible) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Sets visibility for multiple nodes at once.

setNodeVisibility(String nodeId, bool visible) → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Sets the visibility of a specific node.

showAllNodes() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Shows all nodes in the graph.

showSelectedNodes() → void

Available on NodeFlowController<T>, provided by the NodeApi extension

Shows all currently selected nodes.

toggleNodeVisibility(String nodeId) → bool?

Available on NodeFlowController<T>, provided by the NodeApi extension

Toggles visibility of a specific node.