GraphViewDefaultBehavior class

A default implementation of graph view behavior with standard visualization features.

This implementation provides a complete set of basic graph visualization features including node rendering, link visualization, and user interaction handling. It serves both as a ready-to-use behavior and as a base class for custom behaviors.

The default behavior includes:

• Standard node rendering with labels and tooltips
• Link visualization with arrow indicators
• Basic interaction handling like selection and drag operations via event callbacks
• Mouse hover effects

To customize specific aspects, extend this class and override only the methods that need different behavior (e.g., override onTap to handle taps). The default implementation provides a solid foundation for most graph visualization needs.

See also:

• GraphViewBehavior, which defines the interface implemented by this class
• GraphNodeViewBehavior, for node-specific behavior
• GraphLinkViewBehavior, for link-specific behavior

Implemented types

• GraphViewBehavior

Constructors

GraphViewDefaultBehavior({GraphLinkRouting linkRouting = GraphLinkRouting.straight})

Creates a default view behavior with optional linkRouting configuration.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

linkRouting → GraphLinkRouting

The routing style to use for links in this behavior.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createLinkViewBehavior() → GraphLinkViewBehavior

Creates the behavior configuration for link rendering.

override

createNodeViewBehavior() → GraphNodeViewBehavior

Creates the behavior configuration for node rendering.

override

getConnectionPoints(GraphNode source, GraphNode target, Widget sourceWidget, Widget targetWidget) → GraphConnectionPoints?

Calculates connection points between two nodes.

override

hitTestLink(covariant GraphLinkImpl link, Offset position) → bool

Tests if a link contains the given position.

override

hitTestNode(covariant GraphNodeImpl node, Offset position) → bool

Tests if a node contains the given position.

override

isEquivalentTo(GraphViewBehavior other) → bool

Compares this behavior with another for content equality.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onDoubleTap(GraphTapEvent event) → void

Called when entities are double-tapped.

override

onDragEnd(GraphDragEndEvent event) → void

Called when a drag operation on entities completes.

override

onDragStart(GraphDragStartEvent event) → void

Called when a drag operation starts on entities.

override

onDragUpdate(GraphDragUpdateEvent event) → void

Called during a drag operation on entities. Use event.delta for positional changes.

override

onHoverEnd(GraphHoverEndEvent event) → void

Called when the mouse pointer leaves an entity's area.

override

onHoverEnter(GraphHoverEvent event) → void

Called when the mouse pointer enters an entity's area.

override

onHoverMove(GraphHoverEvent event) → void

Called when the mouse pointer moves within an entity's area.

override

onSelectionChange(GraphSelectionChangeEvent event) → void

Called when the selection changes.

override

onTap(GraphTapEvent event) → void

Called when entities are tapped (single or double).

override

onTooltipHide(GraphTooltipHideEvent event) → void

Called when an entity's tooltip is hidden.

override

onTooltipShow(GraphTooltipShowEvent event) → void

Called when an entity's tooltip is shown.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited