static const StringID sorter_names[];

	static GUIBridgeList::SortFunction * const sorter_funcs[];

	/* Internal variables */

	TileIndex start_tile;

	TileIndex end_tile;

	uint32 type;

	GUIBridgeList *bridges;

	int bridgetext_offset; ///< Horizontal offset of the text describing the bridge properties in #BBSW_BRIDGE_LIST relative to the left edge.

	/** Sort the bridges by their index */

	static int CDECL BridgeIndexSorter(const BuildBridgeData *a, const BuildBridgeData *b)

	{

		return a->index - b->index;

	}

	/** Sort the bridges by their price */

	static int CDECL BridgePriceSorter(const BuildBridgeData *a, const BuildBridgeData *b)

	{

		return a->cost - b->cost;

	}

	/** Sort the bridges by their maximum speed */

	static int CDECL BridgeSpeedSorter(const BuildBridgeData *a, const BuildBridgeData *b)

	{

		return a->spec->speed - b->spec->speed;

	}

	void BuildBridge(uint8 i)

	{

		switch ((TransportType)(this->type >> 15)) {

			case TRANSPORT_RAIL: _last_railbridge_type = this->bridges->Get(i)->index; break;

			case TRANSPORT_ROAD: _last_roadbridge_type = this->bridges->Get(i)->index; break;

			default: break;

		}

		DoCommandP(this->end_tile, this->start_tile, this->type | this->bridges->Get(i)->index,

					CMD_BUILD_BRIDGE | CMD_MSG(STR_ERROR_CAN_T_BUILD_BRIDGE_HERE), CcBuildBridge);

	}

	/** Sort the builable bridges */

	void SortBridgeList()

	{

		this->bridges->Sort();

		/* Display the current sort variant */

		this->nested_array[BBSW_DROPDOWN_CRITERIA]->widget_data = this->sorter_names[this->bridges->SortType()];

		/* Set the modified widgets dirty */

	}

public:

	BuildBridgeWindow(const WindowDesc *desc, TileIndex start, TileIndex end, uint32 br_type, GUIBridgeList *bl) : Window(),

		start_tile(start),

		end_tile(end),

		type(br_type),

		bridges(bl)

	{

		this->CreateNestedTree(desc);

		/* Change the data, or the caption of the gui. Set it to road or rail, accordingly. */

		this->nested_array[BBSW_CAPTION]->widget_data = (GB(this->type, 15, 2) == TRANSPORT_ROAD) ? STR_SELECT_ROAD_BRIDGE_CAPTION : STR_SELECT_RAIL_BRIDGE_CAPTION;

		this->FinishInitNested(desc, GB(br_type, 15, 2)); // Initializes 'this->bridgetext_offset'.

		this->parent = FindWindowById(WC_BUILD_TOOLBAR, GB(this->type, 15, 2));

		this->bridges->SetListing(this->last_sorting);

		this->bridges->SetSortFuncs(this->sorter_funcs);

		this->bridges->NeedResort();

		this->SortBridgeList();

		this->vscroll.SetCount(bl->Length());

		this->vscroll.SetCapacity(this->nested_array[BBSW_BRIDGE_LIST]->current_y / this->resize.step_height);

		if (this->last_size < this->vscroll.GetCapacity()) this->last_size = this->vscroll.GetCapacity();

		if (this->last_size > this->vscroll.GetCount()) this->last_size = this->vscroll.GetCount();

		/* Resize the bridge selection window if we used a bigger one the last time. */

		if (this->last_size > this->vscroll.GetCapacity()) {

			ResizeWindow(this, 0, (this->last_size - this->vscroll.GetCapacity()) * this->resize.step_height);

			this->vscroll.SetCapacity(this->last_size);

		}

		this->nested_array[BBSW_BRIDGE_LIST]->widget_data = (this->vscroll.GetCapacity() << MAT_ROW_START) + (1 << MAT_COL_START);

	}

	~BuildBridgeWindow()

	{

		this->last_sorting = this->bridges->GetListing();

		delete bridges;

	}

	virtual void OnPaint()

	{

		this->DrawWidgets();

	}

	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *resize)

	{

		switch (widget) {

			case BBSW_DROPDOWN_ORDER: {