LodExtension class

Level of Detail (LOD) extension that provides reactive visibility settings based on the viewport zoom level.

This extension extends NodeFlowExtension with LODConfig and manages its own config via an internal Observable. It computes visibility settings using MobX Computed values that react to zoom and config changes.

Usage

Access LOD state via the controller's lod getter:

// In a widget build method
return Observer(builder: (_) {
  if (!controller.lod.showConnectionLines) {
    return const SizedBox.shrink();
  }
  return ConnectionsLayer(...);
});

Configuration

Update LOD thresholds at runtime:

controller.lod.updateConfig(LODConfig.disabled); // Always show full detail

Inheritance

Constructors

LodExtension({LODConfig config = LODConfig.defaultConfig}): Creates a LOD extension with optional initial configuration.

Properties

config → LODConfig: The configuration for this extension.
no setteroverride
currentVisibility → DetailVisibility: The current visibility configuration based on zoom level.
no setter
hashCode → int: The hash code for this object.
no setterinherited
id → String: Unique identifier for this extension.
no setteroverride
lodConfig → LODConfig: The LOD configuration containing thresholds and visibility presets.
no setter
normalizedZoom → double: The current zoom value normalized to a 0.0-1.0 range.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
showConnectionEndpoints → bool: Whether connection endpoints should be visible at the current zoom level.
no setter
showConnectionLabels → bool: Whether connection labels should be visible at the current zoom level.
no setter
showConnectionLines → bool: Whether connection lines should be visible at the current zoom level.
no setter
showNodeContent → bool: Whether node content should be visible at the current zoom level.
no setter
showPortLabels → bool: Whether port labels should be visible at the current zoom level.
no setter
showPorts → bool: Whether port shapes should be visible at the current zoom level.
no setter
showResizeHandles → bool: Whether resize handles should be visible at the current zoom level.
no setter

Methods

attach(NodeFlowController controller) → void: Called when the extension is attached to a controller.
override
detach() → void: Called when the extension is detached from the controller.
override
disable() → void: Disables LOD by setting config to LODConfig.disabled.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
onEvent(GraphEvent event) → void: Called when a graph event occurs.
override
toString() → String: A string representation of this object.
inherited
updateConfig(LODConfig newConfig) → void: Updates the LOD configuration at runtime.
useDefault() → void: Enables standard LOD behavior by setting config to LODConfig.defaultConfig.

Operators

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