Class TownDirectoryWindow

src/town_gui.cpp:718–1033

Town directory window class. */

/** Town directory window class. */
struct TownDirectoryWindow : public Window {
private:
	/* Runtime saved values */
	static Listing last_sorting;

	/* Constants for sorting towns */
	static inline const StringID sorter_names[] = {
		STR_SORT_BY_NAME,
		STR_SORT_BY_POPULATION,
		STR_SORT_BY_RATING,
	};
	static const std::initializer_list<GUITownList::SortFunction * const> sorter_funcs;

	StringFilter string_filter{}; ///< Filter for towns
	QueryString townname_editbox; ///< Filter editbox

	GUITownList towns{TownDirectoryWindow::last_sorting.order};

	Scrollbar *vscroll = nullptr;

	void BuildSortTownList()
	{
		if (this->towns.NeedRebuild()) {
			this->towns.clear();
			this->towns.reserve(Town::GetNumItems());

			for (const Town *t : Town::Iterate()) {
				if (this->string_filter.IsEmpty()) {
					this->towns.push_back(t);
					continue;
				}
				this->string_filter.ResetState();
				this->string_filter.AddLine(t->GetCachedName());
				if (this->string_filter.GetState()) this->towns.push_back(t);
			}

			this->towns.RebuildDone();
			this->vscroll->SetCount(this->towns.size()); // Update scrollbar as well.
		}
		/* Always sort the towns. */
		this->towns.Sort();
		this->SetWidgetDirty(WID_TD_LIST); // Force repaint of the displayed towns.
	}

	/** Sort by town name */
	static bool TownNameSorter(const Town * const &a, const Town * const &b, const bool &)
	{
		return StrNaturalCompare(a->GetCachedName(), b->GetCachedName()) < 0; // Sort by name (natural sorting).
	}

	/** Sort by population (default descending, as big towns are of the most interest). */
	static bool TownPopulationSorter(const Town * const &a, const Town * const &b, const bool &order)
	{
		uint32_t a_population = a->cache.population;
		uint32_t b_population = b->cache.population;
		if (a_population == b_population) return TownDirectoryWindow::TownNameSorter(a, b, order);
		return a_population < b_population;
	}