{

		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();