Struct TreeRenderer 

pub struct TreeRenderer<'a, T: TreeItem> {
    pub items: &'a [T],
    pub expanded_ids: &'a HashSet<String>,
    pub children_map: &'a HashMap<String, Vec<T>>,
    pub selected_row: usize,
    pub start_row: usize,
}

Generic tree renderer that handles hierarchical display with expand/collapse

Fields

items: &'a [T]

All items at the current level

expanded_ids: &'a HashSet<String>

Set of expanded item IDs

children_map: &'a HashMap<String, Vec<T>>

Map of parent ID to children

selected_row: usize

Currently selected row index

start_row: usize

Starting row index for this render

Implementations

impl<'a, T: TreeItem> TreeRenderer<'a, T>

pub fn new( items: &'a [T], expanded_ids: &'a HashSet<String>, children_map: &'a HashMap<String, Vec<T>>, selected_row: usize, start_row: usize, ) -> Self

pub fn render<F>(&self, render_cell: F) -> Vec<(Vec<Cell<'a>>, Style)>

where F: FnMut(&T, &str) -> Vec<Cell<'a>>,

Render tree items recursively, returning rows with tree structure

pub fn count_visible_rows( items: &[T], expanded_ids: &HashSet<String>, children_map: &HashMap<String, Vec<T>>, ) -> usize

Count total visible rows including expanded children