SpatialIndexDebugLayer<T> class

Debug layer that visualizes the spatial index grid.

This layer renders an overlay showing how the spatial index partitions the canvas into cells. It displays:

Grid cell boundaries (large cells, typically 500px)
Cell coordinates as [x, y] in the top-left corner (green background when mouse is in cell)
Object counts as vertical list: N: X, C: X, P: X (nodes, connections, ports)
Visual highlighting for active (non-empty) cells

The spatial index grid is much larger than the visual grid (default 500px vs 20px) because it's optimized for query performance, not visual reference.

Usage

Add this layer to your node flow editor when debug mode is enabled:

if (theme.debugMode) ...[
  SpatialIndexDebugLayer<MyData>(
    controller: controller,
    transformationController: transformationController,
    theme: theme,
  ),
],

Inheritance

Object
DiagnosticableTree
Widget
StatelessWidget
SpatialIndexDebugLayer

Available extensions

AnnotationLayerSupport

Constructors

SpatialIndexDebugLayer({Key? key, required NodeFlowController<T> controller, required TransformationController transformationController, required NodeFlowTheme theme}): const

Properties

controller → NodeFlowController<T>: The node flow controller containing the spatial index.
final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
theme → NodeFlowTheme: The node flow theme containing the debug theme configuration.
final
transformationController → TransformationController: The transformation controller for viewport tracking.
final

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited
withAnnotationLayer(NodeFlowController<T> controller) → Widget: Available on Widget, provided by the AnnotationLayerSupport extension
Wraps this widget with an annotation layer.

Operators

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