Method push_visible_children

perro_source/core/perro_ui/src/tree.rs:195–220

(
        &self,
        children: &[Vec<usize>],
        slot: usize,
        depth: u32,
        out: &mut Vec<UiTreeListVisibleItem>,
    )

    }

    fn push_visible_children(
        &self,
        children: &[Vec<usize>],
        slot: usize,
        depth: u32,
        out: &mut Vec<UiTreeListVisibleItem>,
    ) {
        let list = &children[slot];
        for (pos, idx) in list.iter().copied().enumerate() {
            let has_child_items = !children[idx + 1].is_empty();
            let has_children = has_child_items
                || self
                    .items
                    .get(idx)
                    .is_some_and(|item| item.has_children_hint);
            out.push(UiTreeListVisibleItem {
                index: idx,
                depth,
                has_children,
                last_child: pos + 1 == list.len(),
            });
            if has_child_items && self.items.get(idx).is_some_and(|item| item.open) {
                self.push_visible_children(children, idx + 1, depth.saturating_add(1), out);
            }
        }
    }
}

impl Default for UiTreeList {