calculateMaxContentWidth<T> static method

double calculateMaxContentWidth<T>({ required BuildContext context, required List<Node<T>> nodes, required FolderNodeTheme folderTheme, required ParentNodeTheme parentTheme, required ChildNodeTheme childTheme, required ExpandIconTheme expandIconTheme, double leftPadding = 0.0, double rightPadding = 16.0, double maxWidth = double.infinity, })

Calculate the maximum content width from ALL nodes (including collapsed children).

Recursively traverses the entire tree to find the widest node, ensuring stable width regardless of expand/collapse state.

Implementation

static double calculateMaxContentWidth<T>({
  required BuildContext context,
  required List<Node<T>> nodes,
  required FolderNodeTheme folderTheme,
  required ParentNodeTheme parentTheme,
  required ChildNodeTheme childTheme,
  required ExpandIconTheme expandIconTheme,
  double leftPadding = 0.0,
  double rightPadding = 16.0,
  double maxWidth = double.infinity,
}) {
  final linePaintWidth = expandIconTheme.width +
      expandIconTheme.padding.horizontal +
      expandIconTheme.margin.horizontal;

  // Get the base text style from theme to include letterSpacing etc.
  final baseTextStyle = Theme.of(context).textTheme.bodyMedium;

  double maxNodeWidth = 0.0;

  void traverse(List<Node<T>> nodeList, int depth) {
    for (final node in nodeList) {
      final nodeWidth = _calculateNodeWidth(
        node: node,
        depth: depth,
        folderTheme: folderTheme,
        parentTheme: parentTheme,
        childTheme: childTheme,
        expandIconTheme: expandIconTheme,
        linePaintWidth: linePaintWidth,
        rightPadding: rightPadding,
        baseTextStyle: baseTextStyle,
      );
      if (nodeWidth > maxNodeWidth) {
        maxNodeWidth = nodeWidth;
      }
      // Recurse into children regardless of expanded state
      if (node.children.isNotEmpty) {
        traverse(node.children, depth + 1);
      }
    }
  }

  traverse(nodes, 0);

  final totalWidth = leftPadding + maxNodeWidth;
  return totalWidth.clamp(0.0, maxWidth);
}