NodeFlowControllerAPI<T> extension

Annotation and drag operations for NodeFlowController.

This extension provides methods for:

• Annotation CRUD operations
• Annotation factory methods
• Annotation selection and bulk operations
• Widget-level drag operations for nodes, connections, and annotations

on

• NodeFlowController<T>

Methods

addAnnotation(Annotation annotation) → void

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

Adds an annotation to the graph.

clearAnnotationSelection() → void

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

Clears all annotation selections.

createGroupAnnotation({required String title, required Offset position, required Size size, String? id, Color color = const Color(0xFF2196F3)}) → GroupAnnotation

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

Creates and adds a group annotation that visually groups multiple nodes.

createGroupAnnotationAroundNodes({required String title, required Set<String> nodeIds, String? id, EdgeInsets padding = const EdgeInsets.all(20.0), Color color = const Color(0xFF2196F3)}) → GroupAnnotation

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

Creates and adds a group annotation that surrounds the specified nodes.

createMarker({required Offset position, MarkerType markerType = MarkerType.info, String? id, double size = 24.0, Color color = const Color(0xFFF44336), String? tooltip}) → MarkerAnnotation

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

Creates and adds a marker annotation to the graph.

createStickyNote({required Offset position, required String text, String? id, double width = 200.0, double height = 100.0, Color color = const Color(0xFFFFF59D)}) → StickyAnnotation

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

Creates and adds a sticky note annotation to the graph.

deleteSelectedAnnotations() → void

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

Deletes all currently selected annotations.

endAnnotationDrag() → void

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

Ends an annotation drag operation.

endNodeDrag() → void

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

Ends a node drag operation.

getAnnotation(String annotationId) → Annotation?

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

Gets an annotation by its ID.

hideAllAnnotations() → void

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

Hides all annotations in the graph.

isAnnotationSelected(String annotationId) → bool

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

Checks if an annotation is currently selected.

moveAnnotationDrag(Offset graphDelta) → void

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

Moves an annotation during a drag operation.

moveNodeDrag(Offset graphDelta) → void

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

Moves nodes during a drag operation.

removeAnnotation(String annotationId) → void

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

Removes an annotation from the graph.

selectAnnotation(String annotationId, {bool toggle = false}) → void

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

Selects an annotation in the graph.

showAllAnnotations() → void

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

Shows all annotations in the graph.

startAnnotationDrag(String annotationId) → void

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

Starts an annotation drag operation.

startNodeDrag(String nodeId, {MouseCursor? cursor}) → void

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

Starts a node drag operation.