calculateContentHeight<T> static method

double calculateContentHeight<T>({ required List<Node<T>> nodes, double rowHeight = 40.0, double rowSpacing = 0.0, double topPadding = 0.0, double bottomPadding = 0.0, })

Calculate the total content height of all visible nodes

Implementation

static double calculateContentHeight<T>({
  required List<Node<T>> nodes,
  double rowHeight = 40.0,
  double rowSpacing = 0.0,
  double topPadding = 0.0,
  double bottomPadding = 0.0,
}) {
  double height = 0.0;

  for (int i = 0; i < nodes.length; i++) {
    final node = nodes[i];

    // Add this node's height
    height += rowHeight;

    // Add spacing after this node (except for the last node)
    if (i < nodes.length - 1) {
      height += rowSpacing;
    }

    // If expanded, add children's height recursively
    if (node.isExpanded && node.children.isNotEmpty) {
      // Add spacing before children
      if (node.children.isNotEmpty) {
        height += rowSpacing;
      }

      height += calculateContentHeight(
        nodes: node.children,
        rowHeight: rowHeight,
        rowSpacing: rowSpacing,
        // Children don't need extra padding
        topPadding: 0.0,
        bottomPadding: 0.0,
      );
    }
  }

  // Add top and bottom padding to the total height
  return height + topPadding + bottomPadding;
}