Function GuiGroupListAddChildren

src/group_gui.cpp:140–158

* Add children to GUI group list to build a hierarchical tree. * @param list Destination list. * @param item Group item to add children to. * @param fold Whether to handle group folding/hiding. * @param indent Current tree indentation level (set by self with recursion). */

 * @param indent Current tree indentation level (set by self with recursion).
 */
static void GuiGroupListAddChildren(GUIGroupList &list, GUIGroupListItem &item, bool fold, uint8_t indent = 1)
{
	if (fold && item.group->folded) {
		Group::Get(item.group->index)->folded = !item.group->children.empty();
		return;
	}

	if (item.group->children.empty()) return;

	std::vector<GUIGroupListItem> sublist;
	for (const GroupID &group : item.group->children) {
		sublist.emplace_back(Group::Get(group), indent);
	}
	SortGUIGroupList(sublist);

	for (const GUIGroupListItem &subitem : sublist) {
		GuiGroupListAddChildren(list, list.emplace_back(subitem), fold, indent + 1);
	}
}

/**
 * Build GUI group list, a sorted hierarchical list of groups for owner and vehicle type.