FlatNode<T> class

A flattened representation of a tree node for virtualized rendering.

Contains all information needed to render a single row in a flat ListView, including depth, position flags, and ancestor "isLast" info for tree lines.

Constructors

FlatNode({required Node<T> node, required int depth, required bool isFirst, required bool isLast, required bool isRoot, required int ancestorIsLastMask})

const

Properties

ancestorIsLastMask → int

Bitmask of "is this ancestor the last child?" over ancestor depth levels. Bit d (for d in 0 .. depth-1) is set when the ancestor at depth d is the last child of its parent — meaning no vertical continuation line is drawn at that depth. Replaces a per-node List<bool> to avoid a heap allocation for every flattened node (the flags are read only when a row is painted, i.e. only for visible rows). Tree depth is therefore capped at maxDepth.

final

depth → int

Depth level (0 = root)

final

hashCode → int

The hash code for this object.

no setter, inherited

isFirst → bool

Whether this node is the first child of its parent

final

isLast → bool

Whether this node is the last child of its parent

final

isRoot → bool

Whether this is a root-level node

final

node → Node<T>

The original tree node

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

maxDepth → const int

Maximum tree depth representable in ancestorIsLastMask (one bit per ancestor level, within a 64-bit int with headroom).