RowMetrics<T> class

Single source of truth for a row's layout geometry and effective text style.

Both measurement (SizeService-driven width precompute) and rendering (NodeWidget) read their facts from here, so measured width and rendered width cannot drift apart. Build one per layout pass from the already-scaled theme; baseTextStyle (the ambient Theme.of(context).textTheme.bodyMedium) is only needed for measurement.

Constructors

RowMetrics({required FlutterFolderViewTheme<T> theme, TextStyle? baseTextStyle})

Properties

baseTextStyle → TextStyle?
final
expandStripWidth → double
Width of the expand/collapse strip (icon box) — one indent unit.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
theme → FlutterFolderViewTheme<T>
final

Methods

effectiveTextStyle(Node<T> node) → TextStyle?
The theme-level text style for node — textStyleResolver ?? textStyle for its tier. This is the single resolution rule shared by rendering (which applies it via Text.style under the ambient DefaultTextStyle) and measurement (which merges baseTextStyle over it), so a per-node resolver affects measured width exactly as it affects rendered width.
iconBoxWidth(NodeType type) → double
Width of the tier icon box (icon width plus its horizontal padding/margin).
indentWidth(int depth) → double
Horizontal indentation for a node at depth: one expand strip per level.
maxWidth(List<Node<T>> nodes) → double
Widest row across the whole tree (all descendants, regardless of expand state) plus the left content padding — a stable width independent of which nodes are currently expanded.
measureNodeWidth(Node<T> node, int depth) → double
Total width of a single row: indent + own expand strip + tier icon box + measured label + right content padding. Uses baseTextStyle merged with effectiveTextStyle so the measured label matches what is rendered.
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