Function MakeNWidgets

src/widget.cpp:3410–3418

* Construct a nested widget tree from an array of parts. * @param nwid_parts Span of nested widget parts. * @param container Container to add the nested widgets to. In case it is nullptr a vertical container is used. * @return Root of the nested widget tree, a vertical container containing the entire GUI. * @ingroup NestedWidgetParts */

 * @ingroup NestedWidgetParts
 */
std::unique_ptr<NWidgetBase> MakeNWidgets(std::span<const NWidgetPart> nwid_parts, std::unique_ptr<NWidgetBase> &&container)
{
	if (container == nullptr) container = std::make_unique<NWidgetVertical>();
	[[maybe_unused]] auto nwid_part = MakeWidgetTree(std::begin(nwid_parts), std::end(nwid_parts), container);
#ifdef WITH_ASSERT
	if (nwid_part != std::end(nwid_parts)) [[unlikely]] throw std::runtime_error("Did not consume all NWidgetParts");
#endif
	return std::move(container);
}

/**
 * Make a nested widget tree for a window from a parts array. Besides loading, it inserts a shading selection widget