path: root/src/script/api/script_window.hpp

/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file script_window.hpp Everything to handle window interaction. */

#ifndef SCRIPT_WINDOW_HPP
#define SCRIPT_WINDOW_HPP

#include "script_object.hpp"
#include "../../window_type.h"
#include "../../gfx_type.h"

#include "../../widgets/ai_widget.h"
#include "../../widgets/airport_widget.h"
#include "../../widgets/autoreplace_widget.h"
#include "../../widgets/bootstrap_widget.h"
#include "../../widgets/bridge_widget.h"
#include "../../widgets/build_vehicle_widget.h"
#include "../../widgets/cheat_widget.h"
#include "../../widgets/company_widget.h"
#include "../../widgets/console_widget.h"
#include "../../widgets/date_widget.h"
#include "../../widgets/depot_widget.h"
#include "../../widgets/dock_widget.h"
#include "../../widgets/dropdown_widget.h"
#include "../../widgets/engine_widget.h"
#include "../../widgets/error_widget.h"
#include "../../widgets/fios_widget.h"
#include "../../widgets/genworld_widget.h"
#include "../../widgets/goal_widget.h"
#include "../../widgets/graph_widget.h"
#include "../../widgets/group_widget.h"
#include "../../widgets/highscore_widget.h"
#include "../../widgets/industry_widget.h"
#include "../../widgets/intro_widget.h"
#include "../../widgets/main_widget.h"
#include "../../widgets/misc_widget.h"
#include "../../widgets/music_widget.h"
#include "../../widgets/network_chat_widget.h"
#include "../../widgets/network_content_widget.h"
#include "../../widgets/network_widget.h"
#include "../../widgets/newgrf_debug_widget.h"
#include "../../widgets/newgrf_widget.h"
#include "../../widgets/news_widget.h"
#include "../../widgets/object_widget.h"
#include "../../widgets/order_widget.h"
#include "../../widgets/osk_widget.h"
#include "../../widgets/rail_widget.h"
#include "../../widgets/road_widget.h"
#include "../../widgets/settings_widget.h"
#include "../../widgets/sign_widget.h"
#include "../../widgets/smallmap_widget.h"
#include "../../widgets/station_widget.h"
#include "../../widgets/statusbar_widget.h"
#include "../../widgets/subsidy_widget.h"
#include "../../widgets/terraform_widget.h"
#include "../../widgets/timetable_widget.h"
#include "../../widgets/toolbar_widget.h"
#include "../../widgets/town_widget.h"
#include "../../widgets/transparency_widget.h"
#include "../../widgets/tree_widget.h"
#include "../../widgets/vehicle_widget.h"
#include "../../widgets/viewport_widget.h"
#include "../../widgets/waypoint_widget.h"

/**
 * Class that handles window interaction. A Window in OpenTTD has two imporant
 *  values. The WindowClass, and a Window number. The first indicates roughly
 *  which window it is. WC_TOWN_VIEW for example, is the view of a town.
 * The Window number is a bit more complex, as it depends mostly on the
 *  WindowClass. For example for WC_TOWN_VIEW it is the TownID. In general a
 *  good rule of thumb is: either the number is always 0, or the ID of the
 *  object in question.
 * In the comment at the widget enum, it is mentioned how the number is used.
 * @api game
 */
class ScriptWindow : public ScriptObject {
public:
	/**
	 * Window numbers.
	 */
	enum WindowNumberEnum {
		WN_GAME_OPTIONS_AI                        = ::WN_GAME_OPTIONS_AI,                        ///< AI settings.
		WN_GAME_OPTIONS_ABOUT                     = ::WN_GAME_OPTIONS_ABOUT,                     ///< About window.
		WN_GAME_OPTIONS_NEWGRF_STATE              = ::WN_GAME_OPTIONS_NEWGRF_STATE,              ///< NewGRF settings.
		WN_GAME_OPTIONS_MESSAGE_OPTION            = ::WN_GAME_OPTIONS_MESSAGE_OPTION,            ///< News settings.
		WN_GAME_OPTIONS_GAME_OPTIONS              = ::WN_GAME_OPTIONS_GAME_OPTIONS,              ///< Game options.
		WN_GAME_OPTIONS_GAME_DIFFICULTY           = ::WN_GAME_OPTIONS_GAME_DIFFICULTY,           ///< Game difficulty.
		WN_GAME_OPTIONS_GAME_SETTINGS             = ::WN_GAME_OPTIONS_GAME_SETTINGS,             ///< Game settings.
		WN_QUERY_STRING                           = ::WN_QUERY_STRING,                           ///< Query string.
		WN_QUERY_STRING_SIGN                      = ::WN_QUERY_STRING_SIGN,                      ///< Query string for signs.
		WN_CONFIRM_POPUP_QUERY                    = ::WN_CONFIRM_POPUP_QUERY,                    ///< Query popup confirm.
		WN_CONFIRM_POPUP_QUERY_BOOTSTRAP          = ::WN_CONFIRM_POPUP_QUERY_BOOTSTRAP,          ///< Query popup confirm for bootstrap.
		WN_NETWORK_WINDOW_GAME                    = ::WN_NETWORK_WINDOW_GAME,                    ///< Network game window.
		WN_NETWORK_WINDOW_LOBBY                   = ::WN_NETWORK_WINDOW_LOBBY,                   ///< Network lobby window.
		WN_NETWORK_WINDOW_CONTENT_LIST            = ::WN_NETWORK_WINDOW_CONTENT_LIST,            ///< Network content list.
		WN_NETWORK_WINDOW_START                   = ::WN_NETWORK_WINDOW_START,                   ///< Network start server.
		WN_NETWORK_STATUS_WINDOW_JOIN             = ::WN_NETWORK_STATUS_WINDOW_JOIN,             ///< Network join status.
		WN_NETWORK_STATUS_WINDOW_CONTENT_DOWNLOAD = ::WN_NETWORK_STATUS_WINDOW_CONTENT_DOWNLOAD, ///< Network content download status.
	};

	/**
	 * Window classes.
	 */
	enum WindowClass {
		/**
		 * Main window; Window numbers:
		 *   - 0 = #MainWidgets
		 */
		WC_MAIN_WINDOW = ::WC_MAIN_WINDOW,

		/**
		 * Main toolbar (the long bar at the top); Window numbers:
		 *   - 0 = #ToolbarNormalWidgets
		 *   - 0 = #ToolbarEditorWidgets
		 */
		WC_MAIN_TOOLBAR = ::WC_MAIN_TOOLBAR,

		/**
		 * Statusbar (at the bottom of your screen); Window numbers:
		 *   - 0 = #StatusbarWidget
		 */
		WC_STATUS_BAR = ::WC_STATUS_BAR,

		/**
		 * Build toolbar; Window numbers:
		 *   - #TRANSPORT_RAIL = #RailToolbarWidgets
		 *   - #TRANSPORT_AIR = #AirportToolbarWidgets
		 *   - #TRANSPORT_WATER = #DockToolbarWidgets
		 *   - #TRANSPORT_ROAD = #RoadToolbarWidgets
		 */
		WC_BUILD_TOOLBAR = ::WC_BUILD_TOOLBAR,

		/**
		 * Scenario build toolbar; Window numbers:
		 *   - #TRANSPORT_WATER = #DockToolbarWidgets
		 *   - #TRANSPORT_ROAD = #RoadToolbarWidgets
		 */
		WC_SCEN_BUILD_TOOLBAR = ::WC_SCEN_BUILD_TOOLBAR,

		/**
		 * Build trees toolbar; Window numbers:
		 *   - 0 = #BuildTreesWidgets
		 */
		WC_BUILD_TREES = ::WC_BUILD_TREES,

		/**
		 * Transparency toolbar; Window numbers:
		 *   - 0 = #TransparencyToolbarWidgets
		 */
		WC_TRANSPARENCY_TOOLBAR = ::WC_TRANSPARENCY_TOOLBAR,

		/**
		 * Build signal toolbar; Window numbers:
		 *   - #TRANSPORT_RAIL = #BuildSignalWidgets
		 */
		WC_BUILD_SIGNAL = ::WC_BUILD_SIGNAL,

		/**
		 * Small map; Window numbers:
		 *   - 0 = #SmallMapWidgets
		 */
		WC_SMALLMAP = ::WC_SMALLMAP,

		/**
		 * Error message; Window numbers:
		 *   - 0 = #ErrorMessageWidgets
		 */
		WC_ERRMSG = ::WC_ERRMSG,

		/**
		 * Tooltip window; Window numbers:
		 *   - 0 = #ToolTipsWidgets
		 */
		WC_TOOLTIPS = ::WC_TOOLTIPS,

		/**
		 * Query string window; Window numbers:
		 *   - #WN_QUERY_STRING = #QueryStringWidgets
		 *   - #WN_QUERY_STRING_SIGN = #QueryEditSignWidgets
		 */
		WC_QUERY_STRING = ::WC_QUERY_STRING,

		/**
		 * Popup with confirm question; Window numbers:
		 *   - #WN_CONFIRM_POPUP_QUERY = #QueryWidgets
		 *   - #WN_CONFIRM_POPUP_QUERY_BOOTSTRAP = #BootstrapAskForDownloadWidgets
		 */
		WC_CONFIRM_POPUP_QUERY = ::WC_CONFIRM_POPUP_QUERY,

		/**
		 * Popup with a set of buttons, designed to ask the user a question
		 * from a GameScript. %Window numbers:
		 *    - uniqueid = #GoalQuestionWidgets
		 */
		WC_GOAL_QUESTION,



		/**
		 * Saveload window; Window numbers:
		 *   - 0 = #SaveLoadWidgets
		 */
		WC_SAVELOAD = ::WC_SAVELOAD,

		/**
		 * Land info window; Window numbers:
		 *   - 0 = #LandInfoWidgets
		 */
		WC_LAND_INFO = ::WC_LAND_INFO,

		/**
		 * Drop down menu; Window numbers:
		 *   - 0 = #DropdownMenuWidgets
		 */
		WC_DROPDOWN_MENU = ::WC_DROPDOWN_MENU,

		/**
		 * On Screen Keyboard; Window numbers:
		 *   - 0 = #OnScreenKeyboardWidgets
		 */
		WC_OSK = ::WC_OSK,

		/**
		 * Set date; Window numbers:
		 *   - #VehicleID = #SetDateWidgets
		 */
		WC_SET_DATE = ::WC_SET_DATE,


		/**
		 * AI settings; Window numbers:
		 *   - 0 = #AISettingsWidgets
		 */
		WC_AI_SETTINGS = ::WC_AI_SETTINGS,

		/**
		 * NewGRF parameters; Window numbers:
		 *   - 0 = #NewGRFParametersWidgets
		 */
		WC_GRF_PARAMETERS = ::WC_GRF_PARAMETERS,

		/**
		 * textfile; Window numbers:
		 *   - 0 = #NewGRFTextfileWidgets
		 */
		WC_TEXTFILE = ::WC_TEXTFILE,


		/**
		 * Town authority; Window numbers:
		 *   - #TownID = #TownAuthorityWidgets
		 */
		WC_TOWN_AUTHORITY = ::WC_TOWN_AUTHORITY,

		/**
		 * Vehicle details; Window numbers:
		 *   - #VehicleID = #VehicleDetailsWidgets
		 */
		WC_VEHICLE_DETAILS = ::WC_VEHICLE_DETAILS,

		/**
		 * Vehicle refit; Window numbers:
		 *   - #VehicleID = #VehicleRefitWidgets
		 */
		WC_VEHICLE_REFIT = ::WC_VEHICLE_REFIT,

		/**
		 * Vehicle orders; Window numbers:
		 *   - #VehicleID = #OrderWidgets
		 */
		WC_VEHICLE_ORDERS = ::WC_VEHICLE_ORDERS,

		/**
		 * Replace vehicle window; Window numbers:
		 *   - #VehicleType = #ReplaceVehicleWidgets
		 */
		WC_REPLACE_VEHICLE = ::WC_REPLACE_VEHICLE,

		/**
		 * Vehicle timetable; Window numbers:
		 *   - #VehicleID = #VehicleTimetableWidgets
		 */
		WC_VEHICLE_TIMETABLE = ::WC_VEHICLE_TIMETABLE,

		/**
		 * Company colour selection; Window numbers:
		 *   - #CompanyID = #SelectCompanyLiveryWidgets
		 */
		WC_COMPANY_COLOUR = ::WC_COMPANY_COLOUR,

		/**
		 * Alter company face window; Window numbers:
		 *   - #CompanyID = #SelectCompanyManagerFaceWidgets
		 */
		WC_COMPANY_MANAGER_FACE = ::WC_COMPANY_MANAGER_FACE,

		/**
		 * Select station (when joining stations); Window numbers:
		 *   - 0 = #JoinStationWidgets
		 */
		WC_SELECT_STATION = ::WC_SELECT_STATION,

		/**
		 * News window; Window numbers:
		 *   - 0 = #NewsWidgets
		 */
		WC_NEWS_WINDOW = ::WC_NEWS_WINDOW,

		/**
		 * Town directory; Window numbers:
		 *   - 0 = #TownDirectoryWidgets
		 */
		WC_TOWN_DIRECTORY = ::WC_TOWN_DIRECTORY,

		/**
		 * Subsidies list; Window numbers:
		 *   - 0 = #SubsidyListWidgets
		 */
		WC_SUBSIDIES_LIST = ::WC_SUBSIDIES_LIST,

		/**
		 * Industry directory; Window numbers:
		 *   - 0 = #IndustryDirectoryWidgets
		 */
		WC_INDUSTRY_DIRECTORY = ::WC_INDUSTRY_DIRECTORY,

		/**
		 * News history list; Window numbers:
		 *   - 0 = #MessageHistoryWidgets
		 */
		WC_MESSAGE_HISTORY = ::WC_MESSAGE_HISTORY,

		/**
		 * Sign list; Window numbers:
		 *   - 0 = #SignListWidgets
		 */
		WC_SIGN_LIST = ::WC_SIGN_LIST,

		/**
		 * AI list; Window numbers:
		 *   - 0 = #AIListWidgets
		 */
		WC_AI_LIST = ::WC_AI_LIST,

		/**
		 * Goals list; Window numbers:
		 *   - 0 ; #GoalListWidgets
		 */
		WC_GOALS_LIST = ::WC_GOALS_LIST,


		/**
		 * Station list; Window numbers:
		 *   - #CompanyID = #StationListWidgets
		 */
		WC_STATION_LIST = ::WC_STATION_LIST,

		/**
		 * Trains list; Window numbers:
		 *   - Packed value = #GroupListWidgets / #VehicleListWidgets
		 */
		WC_TRAINS_LIST = ::WC_TRAINS_LIST,

		/**
		 * Road vehicle list; Window numbers:
		 *   - Packed value = #GroupListWidgets / #VehicleListWidgets
		 */
		WC_ROADVEH_LIST = ::WC_ROADVEH_LIST,

		/**
		 * Ships list; Window numbers:
		 *   - Packed value = #GroupListWidgets / #VehicleListWidgets
		 */
		WC_SHIPS_LIST = ::WC_SHIPS_LIST,

		/**
		 * Aircraft list; Window numbers:
		 *   - Packed value = #GroupListWidgets / #VehicleListWidgets
		 */
		WC_AIRCRAFT_LIST = ::WC_AIRCRAFT_LIST,


		/**
		 * Town view; Window numbers:
		 *   - #TownID = #TownViewWidgets
		 */
		WC_TOWN_VIEW = ::WC_TOWN_VIEW,

		/**
		 * Vehicle view; Window numbers:
		 *   - #VehicleID = #VehicleViewWidgets
		 */
		WC_VEHICLE_VIEW = ::WC_VEHICLE_VIEW,

		/**
		 * Station view; Window numbers:
		 *   - #StationID = #StationViewWidgets
		 */
		WC_STATION_VIEW = ::WC_STATION_VIEW,

		/**
		 * Depot view; Window numbers:
		 *   - #TileIndex = #DepotWidgets
		 */
		WC_VEHICLE_DEPOT = ::WC_VEHICLE_DEPOT,

		/**
		 * Waypoint view; Window numbers:
		 *   - #WaypointID = #WaypointWidgets
		 */
		WC_WAYPOINT_VIEW = ::WC_WAYPOINT_VIEW,

		/**
		 * Industry view; Window numbers:
		 *   - #IndustryID = #IndustryViewWidgets
		 */
		WC_INDUSTRY_VIEW = ::WC_INDUSTRY_VIEW,

		/**
		 * Company view; Window numbers:
		 *   - #CompanyID = #CompanyWidgets
		 */
		WC_COMPANY = ::WC_COMPANY,


		/**
		 * Build object; Window numbers:
		 *   - 0 = #BuildObjectWidgets
		 */
		WC_BUILD_OBJECT = ::WC_BUILD_OBJECT,

		/**
		 * Build vehicle; Window numbers:
		 *   - #VehicleType = #BuildVehicleWidgets
		 *   - #TileIndex = #BuildVehicleWidgets
		 */
		WC_BUILD_VEHICLE = ::WC_BUILD_VEHICLE,

		/**
		 * Build bridge; Window numbers:
		 *   - #TransportType = #BuildBridgeSelectionWidgets
		 */
		WC_BUILD_BRIDGE = ::WC_BUILD_BRIDGE,

		/**
		 * Build station; Window numbers:
		 *   - #TRANSPORT_AIR = #AirportPickerWidgets
		 *   - #TRANSPORT_WATER = #DockToolbarWidgets
		 *   - #TRANSPORT_RAIL = #BuildRailStationWidgets
		 */
		WC_BUILD_STATION = ::WC_BUILD_STATION,

		/**
		 * Build bus station; Window numbers:
		 *   - #TRANSPORT_ROAD = #BuildRoadStationWidgets
		 */
		WC_BUS_STATION = ::WC_BUS_STATION,

		/**
		 * Build truck station; Window numbers:
		 *   - #TRANSPORT_ROAD = #BuildRoadStationWidgets
		 */
		WC_TRUCK_STATION = ::WC_TRUCK_STATION,

		/**
		 * Build depot; Window numbers:
		 *   - #TRANSPORT_WATER = #BuildDockDepotWidgets
		 *   - #TRANSPORT_RAIL = #BuildRailDepotWidgets
		 *   - #TRANSPORT_ROAD = #BuildRoadDepotWidgets
		 */
		WC_BUILD_DEPOT = ::WC_BUILD_DEPOT,

		/**
		 * Build waypoint; Window numbers:
		 *   - #TRANSPORT_RAIL = #BuildRailWaypointWidgets
		 */
		WC_BUILD_WAYPOINT = ::WC_BUILD_WAYPOINT,

		/**
		 * Found a town; Window numbers:
		 *   - 0 = #TownFoundingWidgets
		 */
		WC_FOUND_TOWN = ::WC_FOUND_TOWN,

		/**
		 * Build industry; Window numbers:
		 *   - 0 = #DynamicPlaceIndustriesWidgets
		 */
		WC_BUILD_INDUSTRY = ::WC_BUILD_INDUSTRY,


		/**
		 * Select game window; Window numbers:
		 *   - 0 = #SelectGameIntroWidgets
		 */
		WC_SELECT_GAME = ::WC_SELECT_GAME,

		/**
		 * Landscape generation (in Scenario Editor); Window numbers:
		 *   - 0 = #TerraformToolbarWidgets
		 *   - 0 = #EditorTerraformToolbarWidgets
		 */
		WC_SCEN_LAND_GEN = ::WC_SCEN_LAND_GEN,

		/**
		 * Generate landscape (newgame); Window numbers:
		 *   - GLWM_SCENARIO = #CreateScenarioWidgets
		 *   - #GenenerateLandscapeWindowMode = #GenerateLandscapeWidgets
		 */
		WC_GENERATE_LANDSCAPE = ::WC_GENERATE_LANDSCAPE,

		/**
		 * Progress report of landscape generation; Window numbers:
		 *   - 0 = #GenerationProgressWidgets
		 *   - 1 = #ScanProgressWidgets
		 */
		WC_MODAL_PROGRESS = ::WC_MODAL_PROGRESS,


		/**
		 * Network window; Window numbers:
		 *   - #WN_NETWORK_WINDOW_GAME = #NetworkGameWidgets
		 *   - #WN_NETWORK_WINDOW_LOBBY = #NetworkLobbyWidgets
		 *   - #WN_NETWORK_WINDOW_CONTENT_LIST = #NetworkContentListWidgets
		 *   - #WN_NETWORK_WINDOW_START = #NetworkStartServerWidgets
		 */
		WC_NETWORK_WINDOW = ::WC_NETWORK_WINDOW,

		/**
		 * Client list; Window numbers:
		 *   - 0 = #ClientListWidgets
		 */
		WC_CLIENT_LIST = ::WC_CLIENT_LIST,

		/**
		 * Popup for the client list; Window numbers:
		 *   - #ClientID = #ClientListPopupWidgets
		 */
		WC_CLIENT_LIST_POPUP = ::WC_CLIENT_LIST_POPUP,

		/**
		 * Network status window; Window numbers:
		 *   - #WN_NETWORK_STATUS_WINDOW_JOIN = #NetworkJoinStatusWidgets
		 *   - #WN_NETWORK_STATUS_WINDOW_CONTENT_DOWNLOAD = #NetworkContentDownloadStatusWidgets
		 */
		WC_NETWORK_STATUS_WINDOW = ::WC_NETWORK_STATUS_WINDOW,

		/**
		 * Chatbox; Window numbers:
		 *   - #DestType = #NetWorkChatWidgets
		 */
		WC_SEND_NETWORK_MSG = ::WC_SEND_NETWORK_MSG,

		/**
		 * Company password query; Window numbers:
		 *   - 0 = #NetworkCompanyPasswordWidgets
		 */
		WC_COMPANY_PASSWORD_WINDOW = ::WC_COMPANY_PASSWORD_WINDOW,


		/**
		 * Industry cargoes chain; Window numbers:
		 *   - 0 = #IndustryCargoesWidgets
		 */
		WC_INDUSTRY_CARGOES = ::WC_INDUSTRY_CARGOES,

		/**
		 * Legend for graphs; Window numbers:
		 *   - 0 = #GraphLegendWidgets
		 */
		WC_GRAPH_LEGEND = ::WC_GRAPH_LEGEND,

		/**
		 * Finances of a company; Window numbers:
		 *   - #CompanyID = #CompanyWidgets
		 */
		WC_FINANCES = ::WC_FINANCES,

		/**
		 * Income graph; Window numbers:
		 *   - 0 = #CompanyValueWidgets
		 */
		WC_INCOME_GRAPH = ::WC_INCOME_GRAPH,

		/**
		 * Operating profit graph; Window numbers:
		 *   - 0 = #CompanyValueWidgets
		 */
		WC_OPERATING_PROFIT = ::WC_OPERATING_PROFIT,

		/**
		 * Delivered cargo graph; Window numbers:
		 *   - 0 = #CompanyValueWidgets
		 */
		WC_DELIVERED_CARGO = ::WC_DELIVERED_CARGO,

		/**
		 * Performance history graph; Window numbers:
		 *   - 0 = #PerformanceHistoryGraphWidgets
		 */
		WC_PERFORMANCE_HISTORY = ::WC_PERFORMANCE_HISTORY,

		/**
		 * Company value graph; Window numbers:
		 *   - 0 = #CompanyValueWidgets
		 */
		WC_COMPANY_VALUE = ::WC_COMPANY_VALUE,

		/**
		 * Company league window; Window numbers:
		 *   - 0 = #CompanyLeagueWidgets
		 */
		WC_COMPANY_LEAGUE = ::WC_COMPANY_LEAGUE,

		/**
		 * Payment rates graph; Window numbers:
		 *   - 0 = #CargoPaymentRatesWidgets
		 */
		WC_PAYMENT_RATES = ::WC_PAYMENT_RATES,

		/**
		 * Performance detail window; Window numbers:
		 *   - 0 = #PerformanceRatingDetailsWidgets
		 */
		WC_PERFORMANCE_DETAIL = ::WC_PERFORMANCE_DETAIL,

		/**
		 * Company infrastructure overview; Window numbers:
		 *   - #CompanyID = #CompanyInfrastructureWidgets
		 */
		WC_COMPANY_INFRASTRUCTURE = ::WC_COMPANY_INFRASTRUCTURE,


		/**
		 * Buyout company (merger); Window numbers:
		 *   - #CompanyID = #BuyCompanyWidgets
		 */
		WC_BUY_COMPANY = ::WC_BUY_COMPANY,

		/**
		 * Engine preview window; Window numbers:
		 *   - #EngineID = #EnginePreviewWidgets
		 */
		WC_ENGINE_PREVIEW = ::WC_ENGINE_PREVIEW,


		/**
		 * Music window; Window numbers:
		 *   - 0 = #MusicWidgets
		 */
		WC_MUSIC_WINDOW = ::WC_MUSIC_WINDOW,

		/**
		 * Music track selection; Window numbers:
		 *   - 0 = MusicTrackSelectionWidgets
		 */
		WC_MUSIC_TRACK_SELECTION = ::WC_MUSIC_TRACK_SELECTION,

		/**
		 * Game options window; Window numbers:
		 *   - #WN_GAME_OPTIONS_AI = #AIConfigWidgets
		 *   - #WN_GAME_OPTIONS_ABOUT = #AboutWidgets
		 *   - #WN_GAME_OPTIONS_NEWGRF_STATE = #NewGRFStateWidgets
		 *   - #WN_GAME_OPTIONS_MESSAGE_OPTION = #MessageOptionWidgets
		 *   - #WN_GAME_OPTIONS_GAME_OPTIONS = #GameOptionsWidgets
		 *   - #WN_GAME_OPTIONS_GAME_DIFFICULTY = #GameDifficultyWidgets
		 *   - #WN_GAME_OPTIONS_GAME_SETTINGS = #GameSettingsWidgets
		 */
		WC_GAME_OPTIONS = ::WC_GAME_OPTIONS,

		/**
		 * Custom currency; Window numbers:
		 *   - 0 = #CustomCurrencyWidgets
		 */
		WC_CUSTOM_CURRENCY = ::WC_CUSTOM_CURRENCY,

		/**
		 * Cheat window; Window numbers:
		 *   - 0 = #CheatWidgets
		 */
		WC_CHEATS = ::WC_CHEATS,

		/**
		 * Extra viewport; Window numbers:
		 *   - Ascending value = #ExtraViewportWidgets
		 */
		WC_EXTRA_VIEW_PORT = ::WC_EXTRA_VIEW_PORT,


		/**
		 * Console; Window numbers:
		 *   - 0 = #ConsoleWidgets
		 */
		WC_CONSOLE = ::WC_CONSOLE,

		/**
		 * Bootstrap; Window numbers:
		 *   - 0 = #BootstrapBackgroundWidgets
		 */
		WC_BOOTSTRAP = ::WC_BOOTSTRAP,

		/**
		 * Highscore; Window numbers:
		 *   - 0 = #HighscoreWidgets
		 */
		WC_HIGHSCORE = ::WC_HIGHSCORE,

		/**
		 * Endscreen; Window numbers:
		 *   - 0 = #HighscoreWidgets
		 */
		WC_ENDSCREEN = ::WC_ENDSCREEN,


		/**
		 * AI debug window; Window numbers:
		 *   - 0 = #AIDebugWidgets
		 */
		WC_AI_DEBUG = ::WC_AI_DEBUG,

		/**
		 * NewGRF inspect (debug); Window numbers:
		 *   - Packed value = #NewGRFInspectWidgets
		 */
		WC_NEWGRF_INSPECT = ::WC_NEWGRF_INSPECT,

		/**
		 * Sprite aligner (debug); Window numbers:
		 *   - 0 = #SpriteAlignerWidgets
		 */
		WC_SPRITE_ALIGNER = ::WC_SPRITE_ALIGNER,

		WC_INVALID = ::WC_INVALID, ///< Invalid window.
	};


	/**
	 * The colours in the game which you can use for text and highlights.
	 */
	enum TextColour {
		/* Note: these values represent part of the in-game TextColour enum */
		TC_BLUE        = ::TC_BLUE,        ///< Blue colour.
		TC_SILVER      = ::TC_SILVER,      ///< Silver colour.
		TC_GOLD        = ::TC_GOLD,        ///< Gold colour.
		TC_RED         = ::TC_RED,         ///< Red colour.
		TC_PURPLE      = ::TC_PURPLE,      ///< Purple colour.
		TC_LIGHT_BROWN = ::TC_LIGHT_BROWN, ///< Light brown colour.
		TC_ORANGE      = ::TC_ORANGE,      ///< Orange colour.
		TC_GREEN       = ::TC_GREEN,       ///< Green colour.
		TC_YELLOW      = ::TC_YELLOW,      ///< Yellow colour.
		TC_DARK_GREEN  = ::TC_DARK_GREEN,  ///< Dark green colour.
		TC_CREAM       = ::TC_CREAM,       ///< Cream colour.
		TC_BROWN       = ::TC_BROWN,       ///< Brown colour.
		TC_WHITE       = ::TC_WHITE,       ///< White colour.
		TC_LIGHT_BLUE  = ::TC_LIGHT_BLUE,  ///< Light blue colour.
		TC_GREY        = ::TC_GREY,        ///< Grey colour.
		TC_DARK_BLUE   = ::TC_DARK_BLUE,   ///< Dark blue colour.
		TC_BLACK       = ::TC_BLACK,       ///< Black colour.
		TC_INVALID     = ::TC_INVALID,     ///< Invalid colour.
	};

	/**
	 * Special number values.
	 */
	enum NumberType {
		NUMBER_ALL = 0xFFFFFFFF, ///< Value to select all windows of a class.
	};

	/**
	 * Special widget values.
	 */
	enum WidgetType {
		WIDGET_ALL = 0xFF, ///< Value to select all widgets of a window.
	};

	/**
	 * Close a window.
	 * @param window The class of the window to close.
	 * @param number The number of the window to close, or NUMBER_ALL to close all of this class.
	 * @pre !ScriptGame::IsMultiplayer().
	 */
	static void Close(WindowClass window, uint32 number);

	/**
	 * Check if a window is open.
	 * @param window The class of the window to check for.
	 * @param number The number of the window to check for, or NUMBER_ALL to check for any in the class.
	 * @pre !ScriptGame::IsMultiplayer().
	 * @return True if the window is open.
	 */
	static bool IsOpen(WindowClass window, uint32 number);

	/**
	 * Highlight a widget in a window.
	 * @param window The class of the window to highlight a widget in.
	 * @param number The number of the window to highlight a widget in.
	 * @param widget The widget in the window to highlight, or WIDGET_ALL (in combination with TC_INVALID) to disable all widget highlighting on this window.
	 * @param colour The colour of the highlight, or TC_INVALID for disabling.
	 * @pre !ScriptGame::IsMultiplayer().
	 * @pre number != NUMBER_ALL.
	 * @pre colour < TC_END || (widget == WIDGET_ALL && colour == TC_INVALID).
	 * @pre IsOpen(window, number).
	 */
	static void Highlight(WindowClass window, uint32 number, uint8 widget, TextColour colour);

	/** Widgets of the #AIListWindow class. */
	enum AIListWidgets {
		WID_AIL_CAPTION                      = ::WID_AIL_CAPTION,                      ///< Caption of the window.
		WID_AIL_LIST                         = ::WID_AIL_LIST,                         ///< The matrix with all available AIs.
		WID_AIL_SCROLLBAR                    = ::WID_AIL_SCROLLBAR,                    ///< Scrollbar next to the AI list.
		WID_AIL_INFO_BG                      = ::WID_AIL_INFO_BG,                      ///< Panel to draw some AI information on.
		WID_AIL_ACCEPT                       = ::WID_AIL_ACCEPT,                       ///< Accept button.
		WID_AIL_CANCEL                       = ::WID_AIL_CANCEL,                       ///< Cancel button.
	};

	/** Widgets of the #AISettingsWindow class. */
	enum AISettingsWidgets {
		WID_AIS_CAPTION                      = ::WID_AIS_CAPTION,                      ///< Caption of the window.
		WID_AIS_BACKGROUND                   = ::WID_AIS_BACKGROUND,                   ///< Panel to draw the settings on.
		WID_AIS_SCROLLBAR                    = ::WID_AIS_SCROLLBAR,                    ///< Scrollbar to scroll through all settings.
		WID_AIS_ACCEPT                       = ::WID_AIS_ACCEPT,                       ///< Accept button.
		WID_AIS_RESET                        = ::WID_AIS_RESET,                        ///< Reset button.
	};

	/** Widgets of the #AIConfigWindow class. */
	enum AIConfigWidgets {
		WID_AIC_BACKGROUND                   = ::WID_AIC_BACKGROUND,                   ///< Window background.
		WID_AIC_DECREASE                     = ::WID_AIC_DECREASE,                     ///< Decrease the number of AIs.
		WID_AIC_INCREASE                     = ::WID_AIC_INCREASE,                     ///< Increase the number of AIs.
		WID_AIC_NUMBER                       = ::WID_AIC_NUMBER,                       ///< Number of AIs.
		WID_AIC_GAMELIST                     = ::WID_AIC_GAMELIST,                     ///< List with current selected GameScript.
		WID_AIC_LIST                         = ::WID_AIC_LIST,                         ///< List with currently selected AIs.
		WID_AIC_SCROLLBAR                    = ::WID_AIC_SCROLLBAR,                    ///< Scrollbar to scroll through the selected AIs.
		WID_AIC_MOVE_UP                      = ::WID_AIC_MOVE_UP,                      ///< Move up button.
		WID_AIC_MOVE_DOWN                    = ::WID_AIC_MOVE_DOWN,                    ///< Move down button.
		WID_AIC_CHANGE                       = ::WID_AIC_CHANGE,                       ///< Select another AI button.
		WID_AIC_CONFIGURE                    = ::WID_AIC_CONFIGURE,                    ///< Change AI settings button.
		WID_AIC_CLOSE                        = ::WID_AIC_CLOSE,                        ///< Close window button.
		WID_AIC_TEXTFILE                     = ::WID_AIC_TEXTFILE,                     ///< Open Script readme, changelog (+1) or license (+2).
		WID_AIC_CONTENT_DOWNLOAD             = ::WID_AIC_CONTENT_DOWNLOAD,             ///< Download content button.
	};

	/** Widgets of the #AIDebugWindow class. */
	enum AIDebugWidgets {
		WID_AID_VIEW                         = ::WID_AID_VIEW,                         ///< The row of company buttons.
		WID_AID_NAME_TEXT                    = ::WID_AID_NAME_TEXT,                    ///< Name of the current selected.
		WID_AID_SETTINGS                     = ::WID_AID_SETTINGS,                     ///< Settings button.
		WID_AID_SCRIPT_GAME                  = ::WID_AID_SCRIPT_GAME,                  ///< Game Script button.
		WID_AID_RELOAD_TOGGLE                = ::WID_AID_RELOAD_TOGGLE,                ///< Reload button.
		WID_AID_LOG_PANEL                    = ::WID_AID_LOG_PANEL,                    ///< Panel where the log is in.
		WID_AID_SCROLLBAR                    = ::WID_AID_SCROLLBAR,                    ///< Scrollbar of the log pannel.
		WID_AID_COMPANY_BUTTON_START         = ::WID_AID_COMPANY_BUTTON_START,         ///< Buttons in the VIEW.
		WID_AID_COMPANY_BUTTON_END           = ::WID_AID_COMPANY_BUTTON_END,           ///< Last possible button in the VIEW.
		WID_AID_BREAK_STRING_WIDGETS         = ::WID_AID_BREAK_STRING_WIDGETS,         ///< The panel to handle the breaking on string.
		WID_AID_BREAK_STR_ON_OFF_BTN         = ::WID_AID_BREAK_STR_ON_OFF_BTN,         ///< Enable breaking on string.
		WID_AID_BREAK_STR_EDIT_BOX           = ::WID_AID_BREAK_STR_EDIT_BOX,           ///< Edit box for the string to break on.
		WID_AID_MATCH_CASE_BTN               = ::WID_AID_MATCH_CASE_BTN,               ///< Checkbox to use match caching or not.
		WID_AID_CONTINUE_BTN                 = ::WID_AID_CONTINUE_BTN,                 ///< Continue button.
	};

	/** Widgets of the #BuildAirToolbarWindow class. */
	enum AirportToolbarWidgets {
		WID_AT_AIRPORT                       = ::WID_AT_AIRPORT,                       ///< Build airport button.
		WID_AT_DEMOLISH                      = ::WID_AT_DEMOLISH,                      ///< Demolish button.
	};

	/** Widgets of the #BuildAirportWindow class. */
	enum AirportPickerWidgets {
		WID_AP_CLASS_DROPDOWN                = ::WID_AP_CLASS_DROPDOWN,                ///< Dropdown of airport classes.
		WID_AP_AIRPORT_LIST                  = ::WID_AP_AIRPORT_LIST,                  ///< List of airports.
		WID_AP_SCROLLBAR                     = ::WID_AP_SCROLLBAR,                     ///< Scrollbar of the list.
		WID_AP_LAYOUT_NUM                    = ::WID_AP_LAYOUT_NUM,                    ///< Current number of the layout.
		WID_AP_LAYOUT_DECREASE               = ::WID_AP_LAYOUT_DECREASE,               ///< Decrease the layout number.
		WID_AP_LAYOUT_INCREASE               = ::WID_AP_LAYOUT_INCREASE,               ///< Increase the layout number.
		WID_AP_AIRPORT_SPRITE                = ::WID_AP_AIRPORT_SPRITE,                ///< A visual display of the airport currently selected.
		WID_AP_EXTRA_TEXT                    = ::WID_AP_EXTRA_TEXT,                    ///< Additional text about the airport.
		WID_AP_BOTTOMPANEL                   = ::WID_AP_BOTTOMPANEL,                   ///< Panel at the bottom.
		WID_AP_COVERAGE_LABEL                = ::WID_AP_COVERAGE_LABEL,                ///< Label if you want to see the coverage.
		WID_AP_BTN_DONTHILIGHT               = ::WID_AP_BTN_DONTHILIGHT,               ///< Don't show the coverage button.
		WID_AP_BTN_DOHILIGHT                 = ::WID_AP_BTN_DOHILIGHT,                 ///< Show the coverage button.
	};

	/** Widgets of the #ReplaceVehicleWindow class. */
	enum ReplaceVehicleWidgets {
		WID_RV_CAPTION                       = ::WID_RV_CAPTION,                       ///< Caption of the window.
		WID_RV_LEFT_MATRIX                   = ::WID_RV_LEFT_MATRIX,                   ///< The matrix on the left.
		WID_RV_LEFT_SCROLLBAR                = ::WID_RV_LEFT_SCROLLBAR,                ///< The scrollbar for the matrix on the left.
		WID_RV_RIGHT_MATRIX                  = ::WID_RV_RIGHT_MATRIX,                  ///< The matrix on the right.
		WID_RV_RIGHT_SCROLLBAR               = ::WID_RV_RIGHT_SCROLLBAR,               ///< The scrollbar for the matrxi on the right.
		WID_RV_LEFT_DETAILS                  = ::WID_RV_LEFT_DETAILS,                  ///< Details of the entry on the left.
		WID_RV_RIGHT_DETAILS                 = ::WID_RV_RIGHT_DETAILS,                 ///< Details of the entry on the right.
		WID_RV_START_REPLACE                 = ::WID_RV_START_REPLACE,                 ///< Start Replacing button.
		WID_RV_INFO_TAB                      = ::WID_RV_INFO_TAB,                      ///< Info tab.
		WID_RV_STOP_REPLACE                  = ::WID_RV_STOP_REPLACE,                  ///< Stop Replacing button.
		WID_RV_TRAIN_ENGINEWAGON_TOGGLE      = ::WID_RV_TRAIN_ENGINEWAGON_TOGGLE,      ///< Button to toggle engines and/or wagons.
		WID_RV_TRAIN_FLUFF_LEFT              = ::WID_RV_TRAIN_FLUFF_LEFT,              ///< The fluff on the left.
		WID_RV_TRAIN_RAILTYPE_DROPDOWN       = ::WID_RV_TRAIN_RAILTYPE_DROPDOWN,       ///< Dropdown menu about the railtype.
		WID_RV_TRAIN_FLUFF_RIGHT             = ::WID_RV_TRAIN_FLUFF_RIGHT,             ///< The fluff on the right.
		WID_RV_TRAIN_WAGONREMOVE_TOGGLE      = ::WID_RV_TRAIN_WAGONREMOVE_TOGGLE,      ///< Button to toggle removing wagons.
	};

	/** Widgets of the #BootstrapBackground class. */
	enum BootstrapBackgroundWidgets {
		WID_BB_BACKGROUND                    = ::WID_BB_BACKGROUND,                    ///< Background of the window.
	};

	/** Widgets of the #BootstrapContentDownloadStatusWindow class. */
	enum BootstrapAskForDownloadWidgets {
		WID_BAFD_QUESTION                    = ::WID_BAFD_QUESTION,                    ///< The question whether to download.
		WID_BAFD_YES                         = ::WID_BAFD_YES,                         ///< An affirmative answer to the question.
		WID_BAFD_NO                          = ::WID_BAFD_NO,                          ///< An negative answer to the question.
	};

	/** Widgets of the #BuildBridgeWindow class. */
	enum BuildBridgeSelectionWidgets {
		WID_BBS_CAPTION                      = ::WID_BBS_CAPTION,                      ///< Caption of the window.
		WID_BBS_DROPDOWN_ORDER               = ::WID_BBS_DROPDOWN_ORDER,               ///< Direction of sort dropdown.
		WID_BBS_DROPDOWN_CRITERIA            = ::WID_BBS_DROPDOWN_CRITERIA,            ///< Criteria of sort dropdown.
		WID_BBS_BRIDGE_LIST                  = ::WID_BBS_BRIDGE_LIST,                  ///< List of bridges.
		WID_BBS_SCROLLBAR                    = ::WID_BBS_SCROLLBAR,                    ///< Scrollbar of the list.
	};

	/** Widgets of the #BuildVehicleWindow class. */
	enum BuildVehicleWidgets {
		WID_BV_CAPTION                       = ::WID_BV_CAPTION,                       ///< Caption of window.
		WID_BV_SORT_ASSENDING_DESCENDING     = ::WID_BV_SORT_ASSENDING_DESCENDING,     ///< Sort direction.
		WID_BV_SORT_DROPDOWN                 = ::WID_BV_SORT_DROPDOWN,                 ///< Criteria of sorting dropdown.
		WID_BV_CARGO_FILTER_DROPDOWN         = ::WID_BV_CARGO_FILTER_DROPDOWN,         ///< Cargo filter dropdown.
		WID_BV_LIST                          = ::WID_BV_LIST,                          ///< List of vehicles.
		WID_BV_SCROLLBAR                     = ::WID_BV_SCROLLBAR,                     ///< Scrollbar of list.
		WID_BV_PANEL                         = ::WID_BV_PANEL,                         ///< Button panel.
		WID_BV_BUILD                         = ::WID_BV_BUILD,                         ///< Build panel.
		WID_BV_BUILD_SEL                     = ::WID_BV_BUILD_SEL,                     ///< Build button.
		WID_BV_RENAME                        = ::WID_BV_RENAME,                        ///< Rename button.
	};

	/** Widgets of the #CheatWindow class.. */
	enum CheatWidgets {
		WID_C_PANEL                          = ::WID_C_PANEL,                          ///< Panel where all cheats are shown in.
	};

	/** Widgets of the #CompanyWindow class. */
	enum CompanyWidgets {
		WID_C_CAPTION                        = ::WID_C_CAPTION,                        ///< Caption of the window.
		WID_C_FACE                           = ::WID_C_FACE,                           ///< View of the face.
		WID_C_FACE_TITLE                     = ::WID_C_FACE_TITLE,                     ///< Title for the face.
		WID_C_DESC_INAUGURATION              = ::WID_C_DESC_INAUGURATION,              ///< Inauguration.
		WID_C_DESC_COLOUR_SCHEME             = ::WID_C_DESC_COLOUR_SCHEME,             ///< Colour scheme.
		WID_C_DESC_COLOUR_SCHEME_EXAMPLE     = ::WID_C_DESC_COLOUR_SCHEME_EXAMPLE,     ///< Colour scheme example.
		WID_C_DESC_VEHICLE                   = ::WID_C_DESC_VEHICLE,                   ///< Vehicles.
		WID_C_DESC_VEHICLE_COUNTS            = ::WID_C_DESC_VEHICLE_COUNTS,            ///< Vehicle count.
		WID_C_DESC_COMPANY_VALUE             = ::WID_C_DESC_COMPANY_VALUE,             ///< Company value.
		WID_C_DESC_INFRASTRUCTURE            = ::WID_C_DESC_INFRASTRUCTURE,            ///< Infrastructure.
		WID_C_DESC_INFRASTRUCTURE_COUNTS     = ::WID_C_DESC_INFRASTRUCTURE_COUNTS,     ///< Infrastructure count.
		WID_C_SELECT_DESC_OWNERS             = ::WID_C_SELECT_DESC_OWNERS,             ///< Owners.
		WID_C_DESC_OWNERS                    = ::WID_C_DESC_OWNERS,                    ///< Owner in Owners.
		WID_C_SELECT_BUTTONS                 = ::WID_C_SELECT_BUTTONS,                 ///< Selection widget for the button bar.
		WID_C_NEW_FACE                       = ::WID_C_NEW_FACE,                       ///< Button to make new face.
		WID_C_COLOUR_SCHEME                  = ::WID_C_COLOUR_SCHEME,                  ///< Button to change colour scheme.
		WID_C_PRESIDENT_NAME                 = ::WID_C_PRESIDENT_NAME,                 ///< Button to change president name.
		WID_C_COMPANY_NAME                   = ::WID_C_COMPANY_NAME,                   ///< Button to change company name.
		WID_C_BUY_SHARE                      = ::WID_C_BUY_SHARE,                      ///< Button to buy a share.
		WID_C_SELL_SHARE                     = ::WID_C_SELL_SHARE,                     ///< Button to sell a share.
		WID_C_SELECT_VIEW_BUILD_HQ           = ::WID_C_SELECT_VIEW_BUILD_HQ,           ///< Panel about HQ.
		WID_C_VIEW_HQ                        = ::WID_C_VIEW_HQ,                        ///< Button to view the HQ.
		WID_C_BUILD_HQ                       = ::WID_C_BUILD_HQ,                       ///< Button to build the HQ.
		WID_C_SELECT_RELOCATE                = ::WID_C_SELECT_RELOCATE,                ///< Panel about 'Relocate HQ'.
		WID_C_RELOCATE_HQ                    = ::WID_C_RELOCATE_HQ,                    ///< Button to relocate the HQ.
		WID_C_VIEW_INFRASTRUCTURE            = ::WID_C_VIEW_INFRASTRUCTURE,            ///< Panel about infrastructure.
		WID_C_HAS_PASSWORD                   = ::WID_C_HAS_PASSWORD,                   ///< Has company password lock.
		WID_C_SELECT_MULTIPLAYER             = ::WID_C_SELECT_MULTIPLAYER,             ///< Multiplayer selection panel.
		WID_C_COMPANY_PASSWORD               = ::WID_C_COMPANY_PASSWORD,               ///< Button to set company password.
		WID_C_COMPANY_JOIN                   = ::WID_C_COMPANY_JOIN,                   ///< Button to join company.
	};

	/** Widgets of the #CompanyFinancesWindow class. */
	enum CompanyFinancesWidgets {
		WID_CF_CAPTION                       = ::WID_CF_CAPTION,                       ///< Caption of the window.
		WID_CF_TOGGLE_SIZE                   = ::WID_CF_TOGGLE_SIZE,                   ///< Toggle windows size.
		WID_CF_SEL_PANEL                     = ::WID_CF_SEL_PANEL,                     ///< Select panel or nothing.
		WID_CF_EXPS_CATEGORY                 = ::WID_CF_EXPS_CATEGORY,                 ///< Column for expenses category strings.
		WID_CF_EXPS_PRICE1                   = ::WID_CF_EXPS_PRICE1,                   ///< Column for year Y-2 expenses.
		WID_CF_EXPS_PRICE2                   = ::WID_CF_EXPS_PRICE2,                   ///< Column for year Y-1 expenses.
		WID_CF_EXPS_PRICE3                   = ::WID_CF_EXPS_PRICE3,                   ///< Column for year Y expenses.
		WID_CF_TOTAL_PANEL                   = ::WID_CF_TOTAL_PANEL,                   ///< Panel for totals.
		WID_CF_SEL_MAXLOAN                   = ::WID_CF_SEL_MAXLOAN,                   ///< Selection of maxloan column.
		WID_CF_BALANCE_VALUE                 = ::WID_CF_BALANCE_VALUE,                 ///< Bank balance value.
		WID_CF_LOAN_VALUE                    = ::WID_CF_LOAN_VALUE,                    ///< Loan.
		WID_CF_LOAN_LINE                     = ::WID_CF_LOAN_LINE,                     ///< Line for summing bank balance and loan.
		WID_CF_TOTAL_VALUE                   = ::WID_CF_TOTAL_VALUE,                   ///< Total.
		WID_CF_MAXLOAN_GAP                   = ::WID_CF_MAXLOAN_GAP,                   ///< Gap above max loan widget.
		WID_CF_MAXLOAN_VALUE                 = ::WID_CF_MAXLOAN_VALUE,                 ///< Max loan widget.
		WID_CF_SEL_BUTTONS                   = ::WID_CF_SEL_BUTTONS,                   ///< Selection of buttons.
		WID_CF_INCREASE_LOAN                 = ::WID_CF_INCREASE_LOAN,                 ///< Increase loan.
		WID_CF_REPAY_LOAN                    = ::WID_CF_REPAY_LOAN,                    ///< Decrease loan..
		WID_CF_INFRASTRUCTURE                = ::WID_CF_INFRASTRUCTURE,                ///< View company infrastructure.
	};

	/** Widgets of the #SelectCompanyLiveryWindow class. */
	enum SelectCompanyLiveryWidgets {
		WID_SCL_CAPTION                      = ::WID_SCL_CAPTION,                      ///< Caption of window.
		WID_SCL_CLASS_GENERAL                = ::WID_SCL_CLASS_GENERAL,                ///< Class general.
		WID_SCL_CLASS_RAIL                   = ::WID_SCL_CLASS_RAIL,                   ///< Class rail.
		WID_SCL_CLASS_ROAD                   = ::WID_SCL_CLASS_ROAD,                   ///< Class road.
		WID_SCL_CLASS_SHIP                   = ::WID_SCL_CLASS_SHIP,                   ///< Class ship.
		WID_SCL_CLASS_AIRCRAFT               = ::WID_SCL_CLASS_AIRCRAFT,               ///< Class aircraft.
		WID_SCL_SPACER_DROPDOWN              = ::WID_SCL_SPACER_DROPDOWN,              ///< Spacer for dropdown.
		WID_SCL_PRI_COL_DROPDOWN             = ::WID_SCL_PRI_COL_DROPDOWN,             ///< Dropdown for primary colour.
		WID_SCL_SEC_COL_DROPDOWN             = ::WID_SCL_SEC_COL_DROPDOWN,             ///< Dropdown for secondary colour.
		WID_SCL_MATRIX                       = ::WID_SCL_MATRIX,                       ///< Matrix.
	};

	/**
	 * Widgets of the #SelectCompanyManagerFaceWindow class.
	 * Do not change the order of the widgets from WID_SCMF_HAS_MOUSTACHE_EARRING to WID_SCMF_GLASSES_R,
	 * this order is needed for the WE_CLICK event of DrawFaceStringLabel().
	 */
	enum SelectCompanyManagerFaceWidgets {
		WID_SCMF_CAPTION                     = ::WID_SCMF_CAPTION,                     ///< Caption of window.
		WID_SCMF_TOGGLE_LARGE_SMALL          = ::WID_SCMF_TOGGLE_LARGE_SMALL,          ///< Toggle for large or small.
		WID_SCMF_SELECT_FACE                 = ::WID_SCMF_SELECT_FACE,                 ///< Select face.
		WID_SCMF_CANCEL                      = ::WID_SCMF_CANCEL,                      ///< Cancel.
		WID_SCMF_ACCEPT                      = ::WID_SCMF_ACCEPT,                      ///< Accept.
		WID_SCMF_MALE                        = ::WID_SCMF_MALE,                        ///< Male button in the simple view.
		WID_SCMF_FEMALE                      = ::WID_SCMF_FEMALE,                      ///< Female button in the simple view.
		WID_SCMF_MALE2                       = ::WID_SCMF_MALE2,                       ///< Male button in the advanced view.
		WID_SCMF_FEMALE2                     = ::WID_SCMF_FEMALE2,                     ///< Female button in the advanced view.
		WID_SCMF_SEL_LOADSAVE                = ::WID_SCMF_SEL_LOADSAVE,                ///< Selection to display the load/save/number buttons in the advanced view.
		WID_SCMF_SEL_MALEFEMALE              = ::WID_SCMF_SEL_MALEFEMALE,              ///< Selection to display the male/female buttons in the simple view.
		WID_SCMF_SEL_PARTS                   = ::WID_SCMF_SEL_PARTS,                   ///< Selection to display the buttons for setting each part of the face in the advanced view.
		WID_SCMF_RANDOM_NEW_FACE             = ::WID_SCMF_RANDOM_NEW_FACE,             ///< Create random new face.
		WID_SCMF_TOGGLE_LARGE_SMALL_BUTTON   = ::WID_SCMF_TOGGLE_LARGE_SMALL_BUTTON,   ///< Toggle for large or small.
		WID_SCMF_FACE                        = ::WID_SCMF_FACE,                        ///< Current face.
		WID_SCMF_LOAD                        = ::WID_SCMF_LOAD,                        ///< Load face.
		WID_SCMF_FACECODE                    = ::WID_SCMF_FACECODE,                    ///< Get the face code.
		WID_SCMF_SAVE                        = ::WID_SCMF_SAVE,                        ///< Save face.
		WID_SCMF_HAS_MOUSTACHE_EARRING_TEXT  = ::WID_SCMF_HAS_MOUSTACHE_EARRING_TEXT,  ///< Text about moustache and earring.
		WID_SCMF_TIE_EARRING_TEXT            = ::WID_SCMF_TIE_EARRING_TEXT,            ///< Text about tie and earring.
		WID_SCMF_LIPS_MOUSTACHE_TEXT         = ::WID_SCMF_LIPS_MOUSTACHE_TEXT,         ///< Text about lips and moustache.
		WID_SCMF_HAS_GLASSES_TEXT            = ::WID_SCMF_HAS_GLASSES_TEXT,            ///< Text about glasses.
		WID_SCMF_HAIR_TEXT                   = ::WID_SCMF_HAIR_TEXT,                   ///< Text about hair.
		WID_SCMF_EYEBROWS_TEXT               = ::WID_SCMF_EYEBROWS_TEXT,               ///< Text about eyebrows.
		WID_SCMF_EYECOLOUR_TEXT              = ::WID_SCMF_EYECOLOUR_TEXT,              ///< Text about eyecolour.
		WID_SCMF_GLASSES_TEXT                = ::WID_SCMF_GLASSES_TEXT,                ///< Text about glasses.
		WID_SCMF_NOSE_TEXT                   = ::WID_SCMF_NOSE_TEXT,                   ///< Text about nose.
		WID_SCMF_CHIN_TEXT                   = ::WID_SCMF_CHIN_TEXT,                   ///< Text about chin.
		WID_SCMF_JACKET_TEXT                 = ::WID_SCMF_JACKET_TEXT,                 ///< Text about jacket.
		WID_SCMF_COLLAR_TEXT                 = ::WID_SCMF_COLLAR_TEXT,                 ///< Text about collar.
		WID_SCMF_ETHNICITY_EUR               = ::WID_SCMF_ETHNICITY_EUR,               ///< Text about ethnicity european.
		WID_SCMF_ETHNICITY_AFR               = ::WID_SCMF_ETHNICITY_AFR,               ///< Text about ethnicity african.
		WID_SCMF_HAS_MOUSTACHE_EARRING       = ::WID_SCMF_HAS_MOUSTACHE_EARRING,       ///< Has moustache or earring.
		WID_SCMF_HAS_GLASSES                 = ::WID_SCMF_HAS_GLASSES,                 ///< Has glasses.
		WID_SCMF_EYECOLOUR_L                 = ::WID_SCMF_EYECOLOUR_L,                 ///< Eyecolour left.
		WID_SCMF_EYECOLOUR                   = ::WID_SCMF_EYECOLOUR,                   ///< Eyecolour.
		WID_SCMF_EYECOLOUR_R                 = ::WID_SCMF_EYECOLOUR_R,                 ///< Eyecolour right.
		WID_SCMF_CHIN_L                      = ::WID_SCMF_CHIN_L,                      ///< Chin left.
		WID_SCMF_CHIN                        = ::WID_SCMF_CHIN,                        ///< Chin.
		WID_SCMF_CHIN_R                      = ::WID_SCMF_CHIN_R,                      ///< Chin right.
		WID_SCMF_EYEBROWS_L                  = ::WID_SCMF_EYEBROWS_L,                  ///< Eyebrows left.
		WID_SCMF_EYEBROWS                    = ::WID_SCMF_EYEBROWS,                    ///< Eyebrows.
		WID_SCMF_EYEBROWS_R                  = ::WID_SCMF_EYEBROWS_R,                  ///< Eyebrows right.
		WID_SCMF_LIPS_MOUSTACHE_L            = ::WID_SCMF_LIPS_MOUSTACHE_L,            ///< Lips / Moustache left.
		WID_SCMF_LIPS_MOUSTACHE              = ::WID_SCMF_LIPS_MOUSTACHE,              ///< Lips / Moustache.
		WID_SCMF_LIPS_MOUSTACHE_R            = ::WID_SCMF_LIPS_MOUSTACHE_R,            ///< Lips / Moustache right.
		WID_SCMF_NOSE_L                      = ::WID_SCMF_NOSE_L,                      ///< Nose left.
		WID_SCMF_NOSE                        = ::WID_SCMF_NOSE,                        ///< Nose.
		WID_SCMF_NOSE_R                      = ::WID_SCMF_NOSE_R,                      ///< Nose right.
		WID_SCMF_HAIR_L                      = ::WID_SCMF_HAIR_L,                      ///< Hair left.
		WID_SCMF_HAIR                        = ::WID_SCMF_HAIR,                        ///< Hair.
		WID_SCMF_HAIR_R                      = ::WID_SCMF_HAIR_R,                      ///< Hair right.
		WID_SCMF_JACKET_L                    = ::WID_SCMF_JACKET_L,                    ///< Jacket left.
		WID_SCMF_JACKET                      = ::WID_SCMF_JACKET,                      ///< Jacket.
		WID_SCMF_JACKET_R                    = ::WID_SCMF_JACKET_R,                    ///< Jacket right.
		WID_SCMF_COLLAR_L                    = ::WID_SCMF_COLLAR_L,                    ///< Collar left.
		WID_SCMF_COLLAR                      = ::WID_SCMF_COLLAR,                      ///< Collar.
		WID_SCMF_COLLAR_R                    = ::WID_SCMF_COLLAR_R,                    ///< Collar right.
		WID_SCMF_TIE_EARRING_L               = ::WID_SCMF_TIE_EARRING_L,               ///< Tie / Earring left.
		WID_SCMF_TIE_EARRING                 = ::WID_SCMF_TIE_EARRING,                 ///< Tie / Earring.
		WID_SCMF_TIE_EARRING_R               = ::WID_SCMF_TIE_EARRING_R,               ///< Tie / Earring right.
		WID_SCMF_GLASSES_L                   = ::WID_SCMF_GLASSES_L,                   ///< Glasses left.
		WID_SCMF_GLASSES                     = ::WID_SCMF_GLASSES,                     ///< Glasses.
		WID_SCMF_GLASSES_R                   = ::WID_SCMF_GLASSES_R,                   ///< Glasses right.
	};

	/** Widgets of the #CompanyInfrastructureWindow class. */
	enum CompanyInfrastructureWidgets {
		WID_CI_CAPTION                       = ::WID_CI_CAPTION,                       ///< Caption of window.
		WID_CI_RAIL_DESC                     = ::WID_CI_RAIL_DESC,                     ///< Description of rail.
		WID_CI_RAIL_COUNT                    = ::WID_CI_RAIL_COUNT,                    ///< Count of rail.
		WID_CI_ROAD_DESC                     = ::WID_CI_ROAD_DESC,                     ///< Description of road.
		WID_CI_ROAD_COUNT                    = ::WID_CI_ROAD_COUNT,                    ///< Count of road.
		WID_CI_WATER_DESC                    = ::WID_CI_WATER_DESC,                    ///< Description of water.
		WID_CI_WATER_COUNT                   = ::WID_CI_WATER_COUNT,                   ///< Count of water.
		WID_CI_STATION_DESC                  = ::WID_CI_STATION_DESC,                  ///< Description of station.
		WID_CI_STATION_COUNT                 = ::WID_CI_STATION_COUNT,                 ///< Count of station.
		WID_CI_TOTAL_DESC                    = ::WID_CI_TOTAL_DESC,                    ///< Description of total.
		WID_CI_TOTAL                         = ::WID_CI_TOTAL,                         ///< Count of total.
	};

	/** Widgets of the #BuyCompanyWindow class. */
	enum BuyCompanyWidgets {
		WID_BC_CAPTION                       = ::WID_BC_CAPTION,                       ///< Caption of window.
		WID_BC_FACE                          = ::WID_BC_FACE,                          ///< Face button.
		WID_BC_QUESTION                      = ::WID_BC_QUESTION,                      ///< Question text.
		WID_BC_NO                            = ::WID_BC_NO,                            ///< No button.
		WID_BC_YES                           = ::WID_BC_YES,                           ///< Yes button.
	};

	/** Widgets of the #IConsoleWindow class. */
	enum ConsoleWidgets {
		WID_C_BACKGROUND                     = ::WID_C_BACKGROUND,                     ///< Background of the console.
	};

	/** Widgets of the #SetDateWindow class. */
	enum SetDateWidgets {
		WID_SD_DAY                           = ::WID_SD_DAY,                           ///< Dropdown for the day.
		WID_SD_MONTH                         = ::WID_SD_MONTH,                         ///< Dropdown for the month.
		WID_SD_YEAR                          = ::WID_SD_YEAR,                          ///< Dropdown for the year.
		WID_SD_SET_DATE                      = ::WID_SD_SET_DATE,                      ///< Actually set the date.
	};

	/** Widgets of the #DepotWindow class. */
	enum DepotWidgets {
		WID_D_CAPTION                        = ::WID_D_CAPTION,                        ///< Caption of window.
		WID_D_SELL                           = ::WID_D_SELL,                           ///< Sell button.
		WID_D_SHOW_SELL_CHAIN                = ::WID_D_SHOW_SELL_CHAIN,                ///< Show sell chain panel.
		WID_D_SELL_CHAIN                     = ::WID_D_SELL_CHAIN,                     ///< Sell chain button.
		WID_D_SELL_ALL                       = ::WID_D_SELL_ALL,                       ///< Sell all button.
		WID_D_AUTOREPLACE                    = ::WID_D_AUTOREPLACE,                    ///< Autoreplace button.
		WID_D_MATRIX                         = ::WID_D_MATRIX,                         ///< Matrix of vehicles.
		WID_D_V_SCROLL                       = ::WID_D_V_SCROLL,                       ///< Vertical scrollbar.
		WID_D_SHOW_H_SCROLL                  = ::WID_D_SHOW_H_SCROLL,                  ///< Show horizontal scrollbar panel.
		WID_D_H_SCROLL                       = ::WID_D_H_SCROLL,                       ///< Horizontal scrollbar.
		WID_D_BUILD                          = ::WID_D_BUILD,                          ///< Build button.
		WID_D_CLONE                          = ::WID_D_CLONE,                          ///< Clone button.
		WID_D_LOCATION                       = ::WID_D_LOCATION,                       ///< Location button.
		WID_D_SHOW_RENAME                    = ::WID_D_SHOW_RENAME,                    ///< Show rename panel.
		WID_D_RENAME                         = ::WID_D_RENAME,                         ///< Rename button.
		WID_D_VEHICLE_LIST                   = ::WID_D_VEHICLE_LIST,                   ///< List of vehicles.
		WID_D_STOP_ALL                       = ::WID_D_STOP_ALL,                       ///< Stop all button.
		WID_D_START_ALL                      = ::WID_D_START_ALL,                      ///< Start all button.
	};

	/** Widgets of the #BuildDocksDepotWindow class. */
	enum BuildDockDepotWidgets {
		WID_BDD_BACKGROUND                   = ::WID_BDD_BACKGROUND,                   ///< Background of the window.
		WID_BDD_X                            = ::WID_BDD_X,                            ///< X-direction button.
		WID_BDD_Y                            = ::WID_BDD_Y,                            ///< Y-direction button.
	};

	/** Widgets of the #BuildDocksToolbarWindow class. */
	enum DockToolbarWidgets {
		WID_DT_CANAL                         = ::WID_DT_CANAL,                         ///< Build canal button.
		WID_DT_LOCK                          = ::WID_DT_LOCK,                          ///< Build lock button.
		WID_DT_DEMOLISH                      = ::WID_DT_DEMOLISH,                      ///< Demolish aka dynamite button.
		WID_DT_DEPOT                         = ::WID_DT_DEPOT,                         ///< Build depot button.
		WID_DT_STATION                       = ::WID_DT_STATION,                       ///< Build station button.
		WID_DT_BUOY                          = ::WID_DT_BUOY,                          ///< Build buoy button.
		WID_DT_RIVER                         = ::WID_DT_RIVER,                         ///< Build river button (in scenario editor).
		WID_DT_BUILD_AQUEDUCT                = ::WID_DT_BUILD_AQUEDUCT,                ///< Build aqueduct button.
		WID_DT_INVALID                       = ::WID_DT_INVALID,                       ///< Used to initialize a variable.
	};

	/** Widgets of the #DropdownWindow class. */
	enum DropdownMenuWidgets {
		WID_DM_ITEMS                         = ::WID_DM_ITEMS,                         ///< Panel showing the dropdown items.
		WID_DM_SHOW_SCROLL                   = ::WID_DM_SHOW_SCROLL,                   ///< Hide scrollbar if too few items.
		WID_DM_SCROLL                        = ::WID_DM_SCROLL,                        ///< Scrollbar.
	};

	/** Widgets of the #EnginePreviewWindow class. */
	enum EnginePreviewWidgets {
		WID_EP_QUESTION                      = ::WID_EP_QUESTION,                      ///< The container for the question.
		WID_EP_NO                            = ::WID_EP_NO,                            ///< No button.
		WID_EP_YES                           = ::WID_EP_YES,                           ///< Yes button.
	};

	/** Widgets of the #ErrmsgWindow class. */
	enum ErrorMessageWidgets {
		WID_EM_CAPTION                       = ::WID_EM_CAPTION,                       ///< Caption of the window.
		WID_EM_FACE                          = ::WID_EM_FACE,                          ///< Error title.
		WID_EM_MESSAGE                       = ::WID_EM_MESSAGE,                       ///< Error message.
	};

	/** Widgets of the #SaveLoadWindow class. */
	enum SaveLoadWidgets {
		WID_SL_CAPTION                       = ::WID_SL_CAPTION,                       ///< Caption of the window.
		WID_SL_SORT_BYNAME                   = ::WID_SL_SORT_BYNAME,                   ///< Sort by name button.
		WID_SL_SORT_BYDATE                   = ::WID_SL_SORT_BYDATE,                   ///< Sort by date button.
		WID_SL_BACKGROUND                    = ::WID_SL_BACKGROUND,                    ///< Background of window.
		WID_SL_FILE_BACKGROUND               = ::WID_SL_FILE_BACKGROUND,               ///< Background of file selection.
		WID_SL_HOME_BUTTON                   = ::WID_SL_HOME_BUTTON,                   ///< Home button.
		WID_SL_DRIVES_DIRECTORIES_LIST       = ::WID_SL_DRIVES_DIRECTORIES_LIST,       ///< Drives list.
		WID_SL_SCROLLBAR                     = ::WID_SL_SCROLLBAR,                     ///< Scrollbar of the file list.
		WID_SL_CONTENT_DOWNLOAD              = ::WID_SL_CONTENT_DOWNLOAD,              ///< Content download button, only available for play scenario/heightmap.
		WID_SL_SAVE_OSK_TITLE                = ::WID_SL_SAVE_OSK_TITLE,                ///< Title textbox, only available for save operations.
		WID_SL_DELETE_SELECTION              = ::WID_SL_DELETE_SELECTION,              ///< Delete button, only available for save operations.
		WID_SL_SAVE_GAME                     = ::WID_SL_SAVE_GAME,                     ///< Save button, only available for save operations.
		WID_SL_CONTENT_DOWNLOAD_SEL          = ::WID_SL_CONTENT_DOWNLOAD_SEL,          ///< Selection 'stack' to 'hide' the content download.
		WID_SL_DETAILS                       = ::WID_SL_DETAILS,                       ///< Panel with game details.
		WID_SL_NEWGRF_INFO                   = ::WID_SL_NEWGRF_INFO,                   ///< Button to open NewGgrf configuration.
		WID_SL_LOAD_BUTTON                   = ::WID_SL_LOAD_BUTTON,                   ///< Button to load game/scenario.
		WID_SL_MISSING_NEWGRFS               = ::WID_SL_MISSING_NEWGRFS,               ///< Button to find missing NewGRFs online.
	};

	/** Widgets of the #GenerateLandscapeWindow class. */
	enum GenerateLandscapeWidgets {
		WID_GL_TEMPERATE                     = ::WID_GL_TEMPERATE,                     ///< Button with icon "Temperate".
		WID_GL_ARCTIC                        = ::WID_GL_ARCTIC,                        ///< Button with icon "Arctic".
		WID_GL_TROPICAL                      = ::WID_GL_TROPICAL,                      ///< Button with icon "Tropical".
		WID_GL_TOYLAND                       = ::WID_GL_TOYLAND,                       ///< Button with icon "Toyland".
		WID_GL_MAPSIZE_X_PULLDOWN            = ::WID_GL_MAPSIZE_X_PULLDOWN,            ///< Dropdown 'map X size'.
		WID_GL_MAPSIZE_Y_PULLDOWN            = ::WID_GL_MAPSIZE_Y_PULLDOWN,            ///< Dropdown 'map Y size'.
		WID_GL_TOWN_PULLDOWN                 = ::WID_GL_TOWN_PULLDOWN,                 ///< Dropdown 'No. of towns'.
		WID_GL_INDUSTRY_PULLDOWN             = ::WID_GL_INDUSTRY_PULLDOWN,             ///< Dropdown 'No. of industries'.
		WID_GL_RANDOM_EDITBOX                = ::WID_GL_RANDOM_EDITBOX,                ///< 'Random seed' editbox.
		WID_GL_RANDOM_BUTTON                 = ::WID_GL_RANDOM_BUTTON,                 ///< 'Randomise' button.
		WID_GL_GENERATE_BUTTON               = ::WID_GL_GENERATE_BUTTON,               ///< 'Generate' button.
		WID_GL_START_DATE_DOWN               = ::WID_GL_START_DATE_DOWN,               ///< Decrease start year.
		WID_GL_START_DATE_TEXT               = ::WID_GL_START_DATE_TEXT,               ///< Start year.
		WID_GL_START_DATE_UP                 = ::WID_GL_START_DATE_UP,                 ///< Increase start year.
		WID_GL_SNOW_LEVEL_DOWN               = ::WID_GL_SNOW_LEVEL_DOWN,               ///< Decrease snow level.
		WID_GL_SNOW_LEVEL_TEXT               = ::WID_GL_SNOW_LEVEL_TEXT,               ///< Snow level.
		WID_GL_SNOW_LEVEL_UP                 = ::WID_GL_SNOW_LEVEL_UP,                 ///< Increase snow level.
		WID_GL_TREE_PULLDOWN                 = ::WID_GL_TREE_PULLDOWN,                 ///< Dropdown 'Tree algorithm'.
		WID_GL_LANDSCAPE_PULLDOWN            = ::WID_GL_LANDSCAPE_PULLDOWN,            ///< Dropdown 'Land generator'.
		WID_GL_HEIGHTMAP_NAME_TEXT           = ::WID_GL_HEIGHTMAP_NAME_TEXT,           ///< Heightmap name.
		WID_GL_HEIGHTMAP_SIZE_TEXT           = ::WID_GL_HEIGHTMAP_SIZE_TEXT,           ///< Size of heightmap.
		WID_GL_HEIGHTMAP_ROTATION_PULLDOWN   = ::WID_GL_HEIGHTMAP_ROTATION_PULLDOWN,   ///< Dropdown 'Heightmap rotation'.
		WID_GL_TERRAIN_PULLDOWN              = ::WID_GL_TERRAIN_PULLDOWN,              ///< Dropdown 'Terrain type'.
		WID_GL_WATER_PULLDOWN                = ::WID_GL_WATER_PULLDOWN,                ///< Dropdown 'Sea level'.
		WID_GL_RIVER_PULLDOWN                = ::WID_GL_RIVER_PULLDOWN,                ///< Dropdown 'Rivers'.
		WID_GL_SMOOTHNESS_PULLDOWN           = ::WID_GL_SMOOTHNESS_PULLDOWN,           ///< Dropdown 'Smoothness'.
		WID_GL_VARIETY_PULLDOWN              = ::WID_GL_VARIETY_PULLDOWN,              ///< Dropdown 'Variety distribution'.
		WID_GL_BORDERS_RANDOM                = ::WID_GL_BORDERS_RANDOM,                ///< 'Random'/'Manual' borders.
		WID_GL_WATER_NW                      = ::WID_GL_WATER_NW,                      ///< NW 'Water'/'Freeform'.
		WID_GL_WATER_NE                      = ::WID_GL_WATER_NE,                      ///< NE 'Water'/'Freeform'.
		WID_GL_WATER_SE                      = ::WID_GL_WATER_SE,                      ///< SE 'Water'/'Freeform'.
		WID_GL_WATER_SW                      = ::WID_GL_WATER_SW,                      ///< SW 'Water'/'Freeform'.
	};

	/** Widgets of the #CreateScenarioWindow class. */
	enum CreateScenarioWidgets {
		WID_CS_TEMPERATE                     = ::WID_CS_TEMPERATE,                     ///< Select temperate landscape style.
		WID_CS_ARCTIC                        = ::WID_CS_ARCTIC,                        ///< Select arctic landscape style.
		WID_CS_TROPICAL                      = ::WID_CS_TROPICAL,                      ///< Select tropical landscape style.
		WID_CS_TOYLAND                       = ::WID_CS_TOYLAND,                       ///< Select toy-land landscape style.
		WID_CS_EMPTY_WORLD                   = ::WID_CS_EMPTY_WORLD,                   ///< Generate an empty flat world.
		WID_CS_RANDOM_WORLD                  = ::WID_CS_RANDOM_WORLD,                  ///< Generate random land button
		WID_CS_MAPSIZE_X_PULLDOWN            = ::WID_CS_MAPSIZE_X_PULLDOWN,            ///< Pull-down arrow for x map size.
		WID_CS_MAPSIZE_Y_PULLDOWN            = ::WID_CS_MAPSIZE_Y_PULLDOWN,            ///< Pull-down arrow for y map size.
		WID_CS_START_DATE_DOWN               = ::WID_CS_START_DATE_DOWN,               ///< Decrease start year (start earlier).
		WID_CS_START_DATE_TEXT               = ::WID_CS_START_DATE_TEXT,               ///< Clickable start date value.
		WID_CS_START_DATE_UP                 = ::WID_CS_START_DATE_UP,                 ///< Increase start year (start later).
		WID_CS_FLAT_LAND_HEIGHT_DOWN         = ::WID_CS_FLAT_LAND_HEIGHT_DOWN,         ///< Decrease flat land height.
		WID_CS_FLAT_LAND_HEIGHT_TEXT         = ::WID_CS_FLAT_LAND_HEIGHT_TEXT,         ///< Clickable flat land height value.
		WID_CS_FLAT_LAND_HEIGHT_UP           = ::WID_CS_FLAT_LAND_HEIGHT_UP,           ///< Increase flat land height.
	};

	/** Widgets of the #GenerateProgressWindow class. */
	enum GenerationProgressWidgets {
		WID_GP_PROGRESS_BAR                  = ::WID_GP_PROGRESS_BAR,                  ///< Progress bar.
		WID_GP_PROGRESS_TEXT                 = ::WID_GP_PROGRESS_TEXT,                 ///< Text with the progress bar.
		WID_GP_ABORT                         = ::WID_GP_ABORT,                         ///< Abort button.
	};

	/** Widgets of the #GoalListWindow class. */
	enum GoalListWidgets {
		WID_GL_PANEL                         = ::WID_GL_PANEL,                         ///< Panel of the window.
		WID_GL_SCROLLBAR                     = ::WID_GL_SCROLLBAR,                     ///< Scrollbar of the panel.
	};

	/** Widgets of the #GoalQuestionWindow class. */
	enum GoalQuestionWidgets {
		WID_GQ_QUESTION                      = ::WID_GQ_QUESTION,                      ///< Question text.
		WID_GQ_BUTTONS                       = ::WID_GQ_BUTTONS,                       ///< Buttons selection (between 1, 2 or 3).
		WID_GQ_BUTTON_1                      = ::WID_GQ_BUTTON_1,                      ///< First button.
		WID_GQ_BUTTON_2                      = ::WID_GQ_BUTTON_2,                      ///< Second button.
		WID_GQ_BUTTON_3                      = ::WID_GQ_BUTTON_3,                      ///< Third button.
	};

	/** Widgets of the #GraphLegendWindow class. */
	enum GraphLegendWidgets {
		WID_GL_BACKGROUND                    = ::WID_GL_BACKGROUND,                    ///< Background of the window.
		WID_GL_FIRST_COMPANY                 = ::WID_GL_FIRST_COMPANY,                 ///< First company in the legend.
		WID_GL_LAST_COMPANY                  = ::WID_GL_LAST_COMPANY,                  ///< Last company in the legend.
	};

	/** Widgets of the #OperatingProfitGraphWindow class, #IncomeGraphWindow class, #DeliveredCargoGraphWindow class, and #CompanyValueGraphWindow class. */
	enum CompanyValueWidgets {
		WID_CV_KEY_BUTTON                    = ::WID_CV_KEY_BUTTON,                    ///< Key button.
		WID_CV_BACKGROUND                    = ::WID_CV_BACKGROUND,                    ///< Background of the window.
		WID_CV_GRAPH                         = ::WID_CV_GRAPH,                         ///< Graph itself.
		WID_CV_RESIZE                        = ::WID_CV_RESIZE,                        ///< Resize button.
	};

	/** Widget of the #PerformanceHistoryGraphWindow class. */
	enum PerformanceHistoryGraphWidgets {
		WID_PHG_KEY                          = ::WID_PHG_KEY,                          ///< Key button.
		WID_PHG_DETAILED_PERFORMANCE         = ::WID_PHG_DETAILED_PERFORMANCE,         ///< Detailed performance.
		WID_PHG_BACKGROUND                   = ::WID_PHG_BACKGROUND,                   ///< Background of the window.
		WID_PHG_GRAPH                        = ::WID_PHG_GRAPH,                        ///< Graph itself.
		WID_PHG_RESIZE                       = ::WID_PHG_RESIZE,                       ///< Resize button.
	};

	/** Widget of the #PaymentRatesGraphWindow class. */
	enum CargoPaymentRatesWidgets {
		WID_CPR_BACKGROUND                   = ::WID_CPR_BACKGROUND,                   ///< Background of the window.
		WID_CPR_HEADER                       = ::WID_CPR_HEADER,                       ///< Header.
		WID_CPR_GRAPH                        = ::WID_CPR_GRAPH,                        ///< Graph itself.
		WID_CPR_RESIZE                       = ::WID_CPR_RESIZE,                       ///< Resize button.
		WID_CPR_FOOTER                       = ::WID_CPR_FOOTER,                       ///< Footer.
		WID_CPR_ENABLE_CARGOES               = ::WID_CPR_ENABLE_CARGOES,               ///< Enable cargoes button.
		WID_CPR_DISABLE_CARGOES              = ::WID_CPR_DISABLE_CARGOES,              ///< Disable cargoes button.
		WID_CPR_CARGO_FIRST                  = ::WID_CPR_CARGO_FIRST,                  ///< First cargo in the list.
	};

	/** Widget of the #CompanyLeagueWindow class. */
	enum CompanyLeagueWidgets {
		WID_CL_BACKGROUND                    = ::WID_CL_BACKGROUND,                    ///< Background of the window.
	};

	/** Widget of the #PerformanceRatingDetailWindow class. */
	enum PerformanceRatingDetailsWidgets {
		WID_PRD_SCORE_FIRST                  = ::WID_PRD_SCORE_FIRST,                  ///< First entry in the score list.
		WID_PRD_SCORE_LAST                   = ::WID_PRD_SCORE_LAST,                   ///< Last entry in the score list.
		WID_PRD_COMPANY_FIRST                = ::WID_PRD_COMPANY_FIRST,                ///< First company.
		WID_PRD_COMPANY_LAST                 = ::WID_PRD_COMPANY_LAST,                 ///< Last company.
	};

	/** Widgets of the #VehicleGroupWindow class. */
	enum GroupListWidgets {
		WID_GL_CAPTION                       = ::WID_GL_CAPTION,                       ///< Caption of the window.
		WID_GL_SORT_BY_ORDER                 = ::WID_GL_SORT_BY_ORDER,                 ///< Sort order.
		WID_GL_SORT_BY_DROPDOWN              = ::WID_GL_SORT_BY_DROPDOWN,              ///< Sort by dropdown list.
		WID_GL_LIST_VEHICLE                  = ::WID_GL_LIST_VEHICLE,                  ///< List of the vehicles.
		WID_GL_LIST_VEHICLE_SCROLLBAR        = ::WID_GL_LIST_VEHICLE_SCROLLBAR,        ///< Scrollbar for the list.
		WID_GL_AVAILABLE_VEHICLES            = ::WID_GL_AVAILABLE_VEHICLES,            ///< Available vehicles.
		WID_GL_MANAGE_VEHICLES_DROPDOWN      = ::WID_GL_MANAGE_VEHICLES_DROPDOWN,      ///< Manage vehicles dropdown list.
		WID_GL_STOP_ALL                      = ::WID_GL_STOP_ALL,                      ///< Stop all button.
		WID_GL_START_ALL                     = ::WID_GL_START_ALL,                     ///< Start all button.
		WID_GL_ALL_VEHICLES                  = ::WID_GL_ALL_VEHICLES,                  ///< All vehicles entry.
		WID_GL_DEFAULT_VEHICLES              = ::WID_GL_DEFAULT_VEHICLES,              ///< Default vehicles entry.
		WID_GL_LIST_GROUP                    = ::WID_GL_LIST_GROUP,                    ///< List of the groups.
		WID_GL_LIST_GROUP_SCROLLBAR          = ::WID_GL_LIST_GROUP_SCROLLBAR,          ///< Scrollbar for the list.
		WID_GL_CREATE_GROUP                  = ::WID_GL_CREATE_GROUP,                  ///< Create group button.
		WID_GL_DELETE_GROUP                  = ::WID_GL_DELETE_GROUP,                  ///< Delete group button.
		WID_GL_RENAME_GROUP                  = ::WID_GL_RENAME_GROUP,                  ///< Rename group button.
		WID_GL_REPLACE_PROTECTION            = ::WID_GL_REPLACE_PROTECTION,            ///< Replace protection button.
	};

	/** Widgets of the #EndGameHighScoreBaseWindow class and #HighScoreWindow class. */
	enum HighscoreWidgets {
		WID_H_BACKGROUND                     = ::WID_H_BACKGROUND,                     ///< Background of the window.
	};

	/** Widgets of the #BuildIndustryWindow class. */
	enum DynamicPlaceIndustriesWidgets {
		WID_DPI_MATRIX_WIDGET                = ::WID_DPI_MATRIX_WIDGET,                ///< Matrix of the industries.
		WID_DPI_SCROLLBAR                    = ::WID_DPI_SCROLLBAR,                    ///< Scrollbar of the matrix.
		WID_DPI_INFOPANEL                    = ::WID_DPI_INFOPANEL,                    ///< Info panel about the industry.
		WID_DPI_DISPLAY_WIDGET               = ::WID_DPI_DISPLAY_WIDGET,               ///< Display chain button.
		WID_DPI_FUND_WIDGET                  = ::WID_DPI_FUND_WIDGET,                  ///< Fund button.
	};

	/** Widgets of the #IndustryViewWindow class. */
	enum IndustryViewWidgets {
		WID_IV_CAPTION                       = ::WID_IV_CAPTION,                       ///< Caption of the window.
		WID_IV_VIEWPORT                      = ::WID_IV_VIEWPORT,                      ///< Viewport of the industry.
		WID_IV_INFO                          = ::WID_IV_INFO,                          ///< Info of the industry.
		WID_IV_GOTO                          = ::WID_IV_GOTO,                          ///< Goto button.
		WID_IV_DISPLAY                       = ::WID_IV_DISPLAY,                       ///< Display chain button.
	};

	/** Widgets of the #IndustryDirectoryWindow class. */
	enum IndustryDirectoryWidgets {
		WID_ID_DROPDOWN_ORDER                = ::WID_ID_DROPDOWN_ORDER,                ///< Dropdown for the order of the sort.
		WID_ID_DROPDOWN_CRITERIA             = ::WID_ID_DROPDOWN_CRITERIA,             ///< Dropdown for the criteria of the sort.
		WID_ID_INDUSTRY_LIST                 = ::WID_ID_INDUSTRY_LIST,                 ///< Industry list.
		WID_ID_SCROLLBAR                     = ::WID_ID_SCROLLBAR,                     ///< Scrollbar of the list.
	};

	/** Widgets of the #IndustryCargoesWindow class */
	enum IndustryCargoesWidgets {
		WID_IC_CAPTION                       = ::WID_IC_CAPTION,                       ///< Caption of the window.
		WID_IC_NOTIFY                        = ::WID_IC_NOTIFY,                        ///< Row of buttons at the bottom.
		WID_IC_PANEL                         = ::WID_IC_PANEL,                         ///< Panel that shows the chain.
		WID_IC_SCROLLBAR                     = ::WID_IC_SCROLLBAR,                     ///< Scrollbar of the panel.
	};

	/** Widgets of the #SelectGameWindow class. */
	enum SelectGameIntroWidgets {
		WID_SGI_GENERATE_GAME                = ::WID_SGI_GENERATE_GAME,                ///< Generate game button.
		WID_SGI_LOAD_GAME                    = ::WID_SGI_LOAD_GAME,                    ///< Load game button.
		WID_SGI_PLAY_SCENARIO                = ::WID_SGI_PLAY_SCENARIO,                ///< Play scenario button.
		WID_SGI_PLAY_HEIGHTMAP               = ::WID_SGI_PLAY_HEIGHTMAP,               ///< Play heightmap button.
		WID_SGI_EDIT_SCENARIO                = ::WID_SGI_EDIT_SCENARIO,                ///< Edit scenario button.
		WID_SGI_PLAY_NETWORK                 = ::WID_SGI_PLAY_NETWORK,                 ///< Play network button.
		WID_SGI_TEMPERATE_LANDSCAPE          = ::WID_SGI_TEMPERATE_LANDSCAPE,          ///< Select temperate landscape button.
		WID_SGI_ARCTIC_LANDSCAPE             = ::WID_SGI_ARCTIC_LANDSCAPE,             ///< Select arctic landscape button.
		WID_SGI_TROPIC_LANDSCAPE             = ::WID_SGI_TROPIC_LANDSCAPE,             ///< Select tropic landscape button.
		WID_SGI_TOYLAND_LANDSCAPE            = ::WID_SGI_TOYLAND_LANDSCAPE,            ///< Select toyland landscape button.
		WID_SGI_TRANSLATION_SELECTION        = ::WID_SGI_TRANSLATION_SELECTION,        ///< Translation selection.
		WID_SGI_TRANSLATION                  = ::WID_SGI_TRANSLATION,                  ///< Translation.
		WID_SGI_OPTIONS                      = ::WID_SGI_OPTIONS,                      ///< Options button.
		WID_SGI_DIFFICULTIES                 = ::WID_SGI_DIFFICULTIES,                 ///< Difficulties button.
		WID_SGI_SETTINGS_OPTIONS             = ::WID_SGI_SETTINGS_OPTIONS,             ///< Settings button.
		WID_SGI_GRF_SETTINGS                 = ::WID_SGI_GRF_SETTINGS,                 ///< NewGRF button.
		WID_SGI_CONTENT_DOWNLOAD             = ::WID_SGI_CONTENT_DOWNLOAD,             ///< Content Download button.
		WID_SGI_AI_SETTINGS                  = ::WID_SGI_AI_SETTINGS,                  ///< AI button.
		WID_SGI_EXIT                         = ::WID_SGI_EXIT,                         ///< Exit button.
	};

	/** Widgets of the #MainWindow class. */
	enum MainWidgets {
		WID_M_VIEWPORT                       = ::WID_M_VIEWPORT,                       ///< Main window viewport.
	};

	/** Widgets of the #LandInfoWindow class. */
	enum LandInfoWidgets {
		WID_LI_BACKGROUND                    = ::WID_LI_BACKGROUND,                    ///< Background of the window.
	};

	/** Widgets of the #TooltipsWindow class. */
	enum ToolTipsWidgets {
		WID_TT_BACKGROUND                    = ::WID_TT_BACKGROUND,                    ///< Background of the window.
	};

	/** Widgets of the #AboutWindow class. */
	enum AboutWidgets {
		WID_A_SCROLLING_TEXT                 = ::WID_A_SCROLLING_TEXT,                 ///< The actually scrolling text.
		WID_A_WEBSITE                        = ::WID_A_WEBSITE,                        ///< URL of OpenTTD website.
	};

	/** Widgets of the #QueryStringWindow class. */
	enum QueryStringWidgets {
		WID_QS_CAPTION                       = ::WID_QS_CAPTION,                       ///< Caption of the window.
		WID_QS_TEXT                          = ::WID_QS_TEXT,                          ///< Text of the query.
		WID_QS_DEFAULT                       = ::WID_QS_DEFAULT,                       ///< Default button.
		WID_QS_CANCEL                        = ::WID_QS_CANCEL,                        ///< Cancel button.
		WID_QS_OK                            = ::WID_QS_OK,                            ///< OK button.
	};

	/** Widgets of the #QueryWindow class. */
	enum QueryWidgets {
		WID_Q_CAPTION                        = ::WID_Q_CAPTION,                        ///< Caption of the window.
		WID_Q_TEXT                           = ::WID_Q_TEXT,                           ///< Text of the query.
		WID_Q_NO                             = ::WID_Q_NO,                             ///< Yes button.
		WID_Q_YES                            = ::WID_Q_YES,                            ///< No button.
	};

	/** Widgets of the #MusicTrackSelectionWindow class. */
	enum MusicTrackSelectionWidgets {
		WID_MTS_LIST_LEFT                    = ::WID_MTS_LIST_LEFT,                    ///< Left button.
		WID_MTS_PLAYLIST                     = ::WID_MTS_PLAYLIST,                     ///< Playlist.
		WID_MTS_LIST_RIGHT                   = ::WID_MTS_LIST_RIGHT,                   ///< Right button.
		WID_MTS_ALL                          = ::WID_MTS_ALL,                          ///< All button.
		WID_MTS_OLD                          = ::WID_MTS_OLD,                          ///< Old button.
		WID_MTS_NEW                          = ::WID_MTS_NEW,                          ///< New button.
		WID_MTS_EZY                          = ::WID_MTS_EZY,                          ///< Ezy button.
		WID_MTS_CUSTOM1                      = ::WID_MTS_CUSTOM1,                      ///< Custom1 button.
		WID_MTS_CUSTOM2                      = ::WID_MTS_CUSTOM2,                      ///< Custom2 button.
		WID_MTS_CLEAR                        = ::WID_MTS_CLEAR,                        ///< Clear button.
	};

	/** Widgets of the #MusicWindow class. */
	enum MusicWidgets {
		WID_M_PREV                           = ::WID_M_PREV,                           ///< Previous button.
		WID_M_NEXT                           = ::WID_M_NEXT,                           ///< Next button.
		WID_M_STOP                           = ::WID_M_STOP,                           ///< Stop button.
		WID_M_PLAY                           = ::WID_M_PLAY,                           ///< Play button.
		WID_M_SLIDERS                        = ::WID_M_SLIDERS,                        ///< Sliders.
		WID_M_MUSIC_VOL                      = ::WID_M_MUSIC_VOL,                      ///< Music volume.
		WID_M_EFFECT_VOL                     = ::WID_M_EFFECT_VOL,                     ///< Effect volume.
		WID_M_BACKGROUND                     = ::WID_M_BACKGROUND,                     ///< Background of the window.
		WID_M_TRACK                          = ::WID_M_TRACK,                          ///< Track playing.
		WID_M_TRACK_NR                       = ::WID_M_TRACK_NR,                       ///< Track number.
		WID_M_TRACK_TITLE                    = ::WID_M_TRACK_TITLE,                    ///< Track title.
		WID_M_TRACK_NAME                     = ::WID_M_TRACK_NAME,                     ///< Track name.
		WID_M_SHUFFLE                        = ::WID_M_SHUFFLE,                        ///< Shuffle button.
		WID_M_PROGRAMME                      = ::WID_M_PROGRAMME,                      ///< Program button.
		WID_M_ALL                            = ::WID_M_ALL,                            ///< All button.
		WID_M_OLD                            = ::WID_M_OLD,                            ///< Old button.
		WID_M_NEW                            = ::WID_M_NEW,                            ///< New button.
		WID_M_EZY                            = ::WID_M_EZY,                            ///< Ezy button.
		WID_M_CUSTOM1                        = ::WID_M_CUSTOM1,                        ///< Custom1 button.
		WID_M_CUSTOM2                        = ::WID_M_CUSTOM2,                        ///< Custom2 button.
	};

	/** Widgets of the #NetworkChatWindow class. */
	enum NetWorkChatWidgets {
		WID_NC_CLOSE                         = ::WID_NC_CLOSE,                         ///< Close button.
		WID_NC_BACKGROUND                    = ::WID_NC_BACKGROUND,                    ///< Background of the window.
		WID_NC_DESTINATION                   = ::WID_NC_DESTINATION,                   ///< Destination.
		WID_NC_TEXTBOX                       = ::WID_NC_TEXTBOX,                       ///< Textbox.
		WID_NC_SENDBUTTON                    = ::WID_NC_SENDBUTTON,                    ///< Send button.
	};

	/** Widgets of the #NetworkContentDownloadStatusWindow class. */
	enum NetworkContentDownloadStatusWidgets {
		WID_NCDS_BACKGROUND                  = ::WID_NCDS_BACKGROUND,                  ///< Background of the window.
		WID_NCDS_CANCELOK                    = ::WID_NCDS_CANCELOK,                    ///< (Optional) Cancel/OK button.
	};

	/** Widgets of the #NetworkContentListWindow class. */
	enum NetworkContentListWidgets {
		WID_NCL_BACKGROUND                   = ::WID_NCL_BACKGROUND,                   ///< Resize button.
		WID_NCL_FILTER_CAPT                  = ::WID_NCL_FILTER_CAPT,                  ///< Caption for the filter editbox.
		WID_NCL_FILTER                       = ::WID_NCL_FILTER,                       ///< Filter editbox.
		WID_NCL_CHECKBOX                     = ::WID_NCL_CHECKBOX,                     ///< Button above checkboxes.
		WID_NCL_TYPE                         = ::WID_NCL_TYPE,                         ///< 'Type' button.
		WID_NCL_NAME                         = ::WID_NCL_NAME,                         ///< 'Name' button.
		WID_NCL_MATRIX                       = ::WID_NCL_MATRIX,                       ///< Panel with list of content.
		WID_NCL_SCROLLBAR                    = ::WID_NCL_SCROLLBAR,                    ///< Scrollbar of matrix.
		WID_NCL_DETAILS                      = ::WID_NCL_DETAILS,                      ///< Panel with content details.
		WID_NCL_SELECT_ALL                   = ::WID_NCL_SELECT_ALL,                   ///< 'Select all' button.
		WID_NCL_SELECT_UPDATE                = ::WID_NCL_SELECT_UPDATE,                ///< 'Select updates' button.
		WID_NCL_UNSELECT                     = ::WID_NCL_UNSELECT,                     ///< 'Unselect all' button.
		WID_NCL_TEXTFILE                     = ::WID_NCL_TEXTFILE,                     ///< Open textfile (readme, changelog (+1) or license (+2)) of some content.
		WID_NCL_OPEN_URL                     = ::WID_NCL_OPEN_URL,                     ///< 'Open url' button.
		WID_NCL_CANCEL                       = ::WID_NCL_CANCEL,                       ///< 'Cancel' button.
		WID_NCL_DOWNLOAD                     = ::WID_NCL_DOWNLOAD,                     ///< 'Download' button.
		WID_NCL_SEL_ALL_UPDATE               = ::WID_NCL_SEL_ALL_UPDATE,               ///< #NWID_SELECTION widget for select all/update buttons..
	};

	/** Widgets of the #NetworkGameWindow class. */
	enum NetworkGameWidgets {
		WID_NG_MAIN                          = ::WID_NG_MAIN,                          ///< Main panel.
		WID_NG_CONNECTION                    = ::WID_NG_CONNECTION,                    ///< Label in front of connection droplist.
		WID_NG_CONN_BTN                      = ::WID_NG_CONN_BTN,                      ///< 'Connection' droplist button.
		WID_NG_CLIENT_LABEL                  = ::WID_NG_CLIENT_LABEL,                  ///< Label in front of client name edit box.
		WID_NG_CLIENT                        = ::WID_NG_CLIENT,                        ///< Panel with editbox to set client name.
		WID_NG_HEADER                        = ::WID_NG_HEADER,                        ///< Header container of the matrix.
		WID_NG_NAME                          = ::WID_NG_NAME,                          ///< 'Name' button.
		WID_NG_CLIENTS                       = ::WID_NG_CLIENTS,                       ///< 'Clients' button.
		WID_NG_MAPSIZE                       = ::WID_NG_MAPSIZE,                       ///< 'Map size' button.
		WID_NG_DATE                          = ::WID_NG_DATE,                          ///< 'Date' button.
		WID_NG_YEARS                         = ::WID_NG_YEARS,                         ///< 'Years' button.
		WID_NG_INFO                          = ::WID_NG_INFO,                          ///< Third button in the game list panel.
		WID_NG_MATRIX                        = ::WID_NG_MATRIX,                        ///< Panel with list of games.
		WID_NG_SCROLLBAR                     = ::WID_NG_SCROLLBAR,                     ///< Scrollbar of matrix.
		WID_NG_LASTJOINED_LABEL              = ::WID_NG_LASTJOINED_LABEL,              ///< Label "Last joined server:".
		WID_NG_LASTJOINED                    = ::WID_NG_LASTJOINED,                    ///< Info about the last joined server.
		WID_NG_LASTJOINED_SPACER             = ::WID_NG_LASTJOINED_SPACER,             ///< Spacer after last joined server panel.
		WID_NG_DETAILS                       = ::WID_NG_DETAILS,                       ///< Panel with game details.
		WID_NG_DETAILS_SPACER                = ::WID_NG_DETAILS_SPACER,                ///< Spacer for game actual details.
		WID_NG_JOIN                          = ::WID_NG_JOIN,                          ///< 'Join game' button.
		WID_NG_REFRESH                       = ::WID_NG_REFRESH,                       ///< 'Refresh server' button.
		WID_NG_NEWGRF                        = ::WID_NG_NEWGRF,                        ///< 'NewGRF Settings' button.
		WID_NG_NEWGRF_SEL                    = ::WID_NG_NEWGRF_SEL,                    ///< Selection 'widget' to hide the NewGRF settings.
		WID_NG_NEWGRF_MISSING                = ::WID_NG_NEWGRF_MISSING,                ///< 'Find missing NewGRF online' button.
		WID_NG_NEWGRF_MISSING_SEL            = ::WID_NG_NEWGRF_MISSING_SEL,            ///< Selection widget for the above button.
		WID_NG_FIND                          = ::WID_NG_FIND,                          ///< 'Find server' button.
		WID_NG_ADD                           = ::WID_NG_ADD,                           ///< 'Add server' button.
		WID_NG_START                         = ::WID_NG_START,                         ///< 'Start server' button.
		WID_NG_CANCEL                        = ::WID_NG_CANCEL,                        ///< 'Cancel' button.
	};

	/** Widgets of the #NetworkStartServerWindow class. */
	enum NetworkStartServerWidgets {
		WID_NSS_BACKGROUND                   = ::WID_NSS_BACKGROUND,                   ///< Background of the window.
		WID_NSS_GAMENAME_LABEL               = ::WID_NSS_GAMENAME_LABEL,               ///< Label for the game name.
		WID_NSS_GAMENAME                     = ::WID_NSS_GAMENAME,                     ///< Background for editbox to set game name.
		WID_NSS_SETPWD                       = ::WID_NSS_SETPWD,                       ///< 'Set password' button.
		WID_NSS_CONNTYPE_LABEL               = ::WID_NSS_CONNTYPE_LABEL,               ///< Label for 'connection type'.
		WID_NSS_CONNTYPE_BTN                 = ::WID_NSS_CONNTYPE_BTN,                 ///< 'Connection type' droplist button.
		WID_NSS_CLIENTS_LABEL                = ::WID_NSS_CLIENTS_LABEL,                ///< Label for 'max clients'.
		WID_NSS_CLIENTS_BTND                 = ::WID_NSS_CLIENTS_BTND,                 ///< 'Max clients' downarrow.
		WID_NSS_CLIENTS_TXT                  = ::WID_NSS_CLIENTS_TXT,                  ///< 'Max clients' text.
		WID_NSS_CLIENTS_BTNU                 = ::WID_NSS_CLIENTS_BTNU,                 ///< 'Max clients' uparrow.
		WID_NSS_COMPANIES_LABEL              = ::WID_NSS_COMPANIES_LABEL,              ///< Label for 'max companies'.
		WID_NSS_COMPANIES_BTND               = ::WID_NSS_COMPANIES_BTND,               ///< 'Max companies' downarrow.
		WID_NSS_COMPANIES_TXT                = ::WID_NSS_COMPANIES_TXT,                ///< 'Max companies' text.
		WID_NSS_COMPANIES_BTNU               = ::WID_NSS_COMPANIES_BTNU,               ///< 'Max companies' uparrow.
		WID_NSS_SPECTATORS_LABEL             = ::WID_NSS_SPECTATORS_LABEL,             ///< Label for 'max spectators'.
		WID_NSS_SPECTATORS_BTND              = ::WID_NSS_SPECTATORS_BTND,              ///< 'Max spectators' downarrow.
		WID_NSS_SPECTATORS_TXT               = ::WID_NSS_SPECTATORS_TXT,               ///< 'Max spectators' text.
		WID_NSS_SPECTATORS_BTNU              = ::WID_NSS_SPECTATORS_BTNU,              ///< 'Max spectators' uparrow.
		WID_NSS_LANGUAGE_LABEL               = ::WID_NSS_LANGUAGE_LABEL,               ///< Label for 'language spoken'.
		WID_NSS_LANGUAGE_BTN                 = ::WID_NSS_LANGUAGE_BTN,                 ///< 'Language spoken' droplist button.
		WID_NSS_GENERATE_GAME                = ::WID_NSS_GENERATE_GAME,                ///< New game button.
		WID_NSS_LOAD_GAME                    = ::WID_NSS_LOAD_GAME,                    ///< Load game button.
		WID_NSS_PLAY_SCENARIO                = ::WID_NSS_PLAY_SCENARIO,                ///< Play scenario button.
		WID_NSS_PLAY_HEIGHTMAP               = ::WID_NSS_PLAY_HEIGHTMAP,               ///< Play heightmap button.
		WID_NSS_CANCEL                       = ::WID_NSS_CANCEL,                       ///< 'Cancel' button.
	};

	/** Widgets of the #NetworkLobbyWindow class. */
	enum NetworkLobbyWidgets {
		WID_NL_BACKGROUND                    = ::WID_NL_BACKGROUND,                    ///< Background of the window.
		WID_NL_TEXT                          = ::WID_NL_TEXT,                          ///< Heading text.
		WID_NL_HEADER                        = ::WID_NL_HEADER,                        ///< Header above list of companies.
		WID_NL_MATRIX                        = ::WID_NL_MATRIX,                        ///< List of companies.
		WID_NL_SCROLLBAR                     = ::WID_NL_SCROLLBAR,                     ///< Scroll bar.
		WID_NL_DETAILS                       = ::WID_NL_DETAILS,                       ///< Company details.
		WID_NL_JOIN                          = ::WID_NL_JOIN,                          ///< 'Join company' button.
		WID_NL_NEW                           = ::WID_NL_NEW,                           ///< 'New company' button.
		WID_NL_SPECTATE                      = ::WID_NL_SPECTATE,                      ///< 'Spectate game' button.
		WID_NL_REFRESH                       = ::WID_NL_REFRESH,                       ///< 'Refresh server' button.
		WID_NL_CANCEL                        = ::WID_NL_CANCEL,                        ///< 'Cancel' button.
	};

	/** Widgets of the #NetworkClientListWindow class. */
	enum ClientListWidgets {
		WID_CL_PANEL                         = ::WID_CL_PANEL,                         ///< Panel of the window.
	};

	/** Widgets of the #NetworkClientListPopupWindow class. */
	enum ClientListPopupWidgets {
		WID_CLP_PANEL                        = ::WID_CLP_PANEL,                        ///< Panel of the window.
	};

	/** Widgets of the #NetworkJoinStatusWindow class. */
	enum NetworkJoinStatusWidgets {
		WID_NJS_BACKGROUND                   = ::WID_NJS_BACKGROUND,                   ///< Background of the window.
		WID_NJS_CANCELOK                     = ::WID_NJS_CANCELOK,                     ///< Cancel / OK button.
	};

	/** Widgets of the #NetworkCompanyPasswordWindow class. */
	enum NetworkCompanyPasswordWidgets {
		WID_NCP_BACKGROUND                   = ::WID_NCP_BACKGROUND,                   ///< Background of the window.
		WID_NCP_LABEL                        = ::WID_NCP_LABEL,                        ///< Label in front of the password field.
		WID_NCP_PASSWORD                     = ::WID_NCP_PASSWORD,                     ///< Input field for the password.
		WID_NCP_SAVE_AS_DEFAULT_PASSWORD     = ::WID_NCP_SAVE_AS_DEFAULT_PASSWORD,     ///< Toggle 'button' for saving the current password as default password.
		WID_NCP_CANCEL                       = ::WID_NCP_CANCEL,                       ///< Close the window without changing anything.
		WID_NCP_OK                           = ::WID_NCP_OK,                           ///< Safe the password etc.
	};

	/** Widgets of the #NewGRFInspectWindow class. */
	enum NewGRFInspectWidgets {
		WID_NGRFI_CAPTION                    = ::WID_NGRFI_CAPTION,                    ///< The caption bar of course.
		WID_NGRFI_PARENT                     = ::WID_NGRFI_PARENT,                     ///< Inspect the parent.
		WID_NGRFI_MAINPANEL                  = ::WID_NGRFI_MAINPANEL,                  ///< Panel widget containing the actual data.
		WID_NGRFI_SCROLLBAR                  = ::WID_NGRFI_SCROLLBAR,                  ///< Scrollbar.
	};

	/** Widgets of the #SpriteAlignerWindow class. */
	enum SpriteAlignerWidgets {
		WID_SA_CAPTION                       = ::WID_SA_CAPTION,                       ///< Caption of the window.
		WID_SA_PREVIOUS                      = ::WID_SA_PREVIOUS,                      ///< Skip to the previous sprite.
		WID_SA_GOTO                          = ::WID_SA_GOTO,                          ///< Go to a given sprite.
		WID_SA_NEXT                          = ::WID_SA_NEXT,                          ///< Skip to the next sprite.
		WID_SA_UP                            = ::WID_SA_UP,                            ///< Move the sprite up.
		WID_SA_LEFT                          = ::WID_SA_LEFT,                          ///< Move the sprite to the left.
		WID_SA_RIGHT                         = ::WID_SA_RIGHT,                         ///< Move the sprite to the right.
		WID_SA_DOWN                          = ::WID_SA_DOWN,                          ///< Move the sprite down.
		WID_SA_SPRITE                        = ::WID_SA_SPRITE,                        ///< The actual sprite.
		WID_SA_OFFSETS                       = ::WID_SA_OFFSETS,                       ///< The sprite offsets.
		WID_SA_PICKER                        = ::WID_SA_PICKER,                        ///< Sprite picker.
		WID_SA_LIST                          = ::WID_SA_LIST,                          ///< Queried sprite list.
		WID_SA_SCROLLBAR                     = ::WID_SA_SCROLLBAR,                     ///< Scrollbar for sprite list.
	};

	/** Widgets of the #NewGRFParametersWindow class. */
	enum NewGRFParametersWidgets {
		WID_NP_SHOW_NUMPAR                   = ::WID_NP_SHOW_NUMPAR,                   ///< #NWID_SELECTION to optionally display #WID_NP_NUMPAR.
		WID_NP_NUMPAR_DEC                    = ::WID_NP_NUMPAR_DEC,                    ///< Button to decrease number of parameters.
		WID_NP_NUMPAR_INC                    = ::WID_NP_NUMPAR_INC,                    ///< Button to increase number of parameters.
		WID_NP_NUMPAR                        = ::WID_NP_NUMPAR,                        ///< Optional number of parameters.
		WID_NP_NUMPAR_TEXT                   = ::WID_NP_NUMPAR_TEXT,                   ///< Text description.
		WID_NP_BACKGROUND                    = ::WID_NP_BACKGROUND,                    ///< Panel to draw the settings on.
		WID_NP_SCROLLBAR                     = ::WID_NP_SCROLLBAR,                     ///< Scrollbar to scroll through all settings.
		WID_NP_ACCEPT                        = ::WID_NP_ACCEPT,                        ///< Accept button.
		WID_NP_RESET                         = ::WID_NP_RESET,                         ///< Reset button.
		WID_NP_SHOW_DESCRIPTION              = ::WID_NP_SHOW_DESCRIPTION,              ///< #NWID_SELECTION to optionally display parameter descriptions.
		WID_NP_DESCRIPTION                   = ::WID_NP_DESCRIPTION,                   ///< Multi-line description of a parameter.
	};

	/** Widgets of the #NewGRFWindow class. */
	enum NewGRFStateWidgets {
		WID_NS_PRESET_LIST                   = ::WID_NS_PRESET_LIST,                   ///< Active NewGRF preset.
		WID_NS_PRESET_SAVE                   = ::WID_NS_PRESET_SAVE,                   ///< Save list of active NewGRFs as presets.
		WID_NS_PRESET_DELETE                 = ::WID_NS_PRESET_DELETE,                 ///< Delete active preset.
		WID_NS_ADD                           = ::WID_NS_ADD,                           ///< Add NewGRF to active list.
		WID_NS_REMOVE                        = ::WID_NS_REMOVE,                        ///< Remove NewGRF from active list.
		WID_NS_MOVE_UP                       = ::WID_NS_MOVE_UP,                       ///< Move NewGRF up in active list.
		WID_NS_MOVE_DOWN                     = ::WID_NS_MOVE_DOWN,                     ///< Move NewGRF down in active list.
		WID_NS_FILTER                        = ::WID_NS_FILTER,                        ///< Filter list of available NewGRFs.
		WID_NS_FILE_LIST                     = ::WID_NS_FILE_LIST,                     ///< List window of active NewGRFs.
		WID_NS_SCROLLBAR                     = ::WID_NS_SCROLLBAR,                     ///< Scrollbar for active NewGRF list.
		WID_NS_AVAIL_LIST                    = ::WID_NS_AVAIL_LIST,                    ///< List window of available NewGRFs.
		WID_NS_SCROLL2BAR                    = ::WID_NS_SCROLL2BAR,                    ///< Scrollbar for available NewGRF list.
		WID_NS_NEWGRF_INFO_TITLE             = ::WID_NS_NEWGRF_INFO_TITLE,             ///< Title for Info on selected NewGRF.
		WID_NS_NEWGRF_INFO                   = ::WID_NS_NEWGRF_INFO,                   ///< Panel for Info on selected NewGRF.
		WID_NS_OPEN_URL                      = ::WID_NS_OPEN_URL,                      ///< Open URL of NewGRF.
		WID_NS_NEWGRF_TEXTFILE               = ::WID_NS_NEWGRF_TEXTFILE,               ///< Open NewGRF readme, changelog (+1) or license (+2).
		WID_NS_SET_PARAMETERS                = ::WID_NS_SET_PARAMETERS,                ///< Open Parameters Window for selected NewGRF for editing parameters.
		WID_NS_VIEW_PARAMETERS               = ::WID_NS_VIEW_PARAMETERS,               ///< Open Parameters Window for selected NewGRF for viewing parameters.
		WID_NS_TOGGLE_PALETTE                = ::WID_NS_TOGGLE_PALETTE,                ///< Toggle Palette of selected, active NewGRF.
		WID_NS_APPLY_CHANGES                 = ::WID_NS_APPLY_CHANGES,                 ///< Apply changes to NewGRF config.
		WID_NS_RESCAN_FILES                  = ::WID_NS_RESCAN_FILES,                  ///< Rescan files (available NewGRFs).
		WID_NS_RESCAN_FILES2                 = ::WID_NS_RESCAN_FILES2,                 ///< Rescan files (active NewGRFs).
		WID_NS_CONTENT_DOWNLOAD              = ::WID_NS_CONTENT_DOWNLOAD,              ///< Open content download (available NewGRFs).
		WID_NS_CONTENT_DOWNLOAD2             = ::WID_NS_CONTENT_DOWNLOAD2,             ///< Open content download (active NewGRFs).
		WID_NS_SHOW_REMOVE                   = ::WID_NS_SHOW_REMOVE,                   ///< Select active list buttons (0 = normal, 1 = simple layout).
		WID_NS_SHOW_APPLY                    = ::WID_NS_SHOW_APPLY,                    ///< Select display of the buttons below the 'details'.
	};

	/** Widgets of the #ScanProgressWindow class. */
	enum ScanProgressWidgets {
		WID_SP_PROGRESS_BAR                  = ::WID_SP_PROGRESS_BAR,                  ///< Simple progress bar.
		WID_SP_PROGRESS_TEXT                 = ::WID_SP_PROGRESS_TEXT,                 ///< Text explaining what is happening.
	};

	/** Widgets of the #TextfileWindow class. */
	enum TextfileWidgets {
		WID_TF_CAPTION                       = ::WID_TF_CAPTION,                       ///< The caption of the window.
		WID_TF_BACKGROUND                    = ::WID_TF_BACKGROUND,                    ///< Panel to draw the textfile on.
		WID_TF_VSCROLLBAR                    = ::WID_TF_VSCROLLBAR,                    ///< Vertical scrollbar to scroll through the textfile up-and-down.
		WID_TF_HSCROLLBAR                    = ::WID_TF_HSCROLLBAR,                    ///< Horizontal scrollbar to scroll through the textfile left-to-right.
	};

	/** Widgets of the #NewsWindow class. */
	enum NewsWidgets {
		WID_N_PANEL                          = ::WID_N_PANEL,                          ///< Panel of the window.
		WID_N_TITLE                          = ::WID_N_TITLE,                          ///< Title of the company news.
		WID_N_HEADLINE                       = ::WID_N_HEADLINE,                       ///< The news headline.
		WID_N_CLOSEBOX                       = ::WID_N_CLOSEBOX,                       ///< Close the window.
		WID_N_DATE                           = ::WID_N_DATE,                           ///< Date of the news item.
		WID_N_CAPTION                        = ::WID_N_CAPTION,                        ///< Title bar of the window. Only used in small news items.
		WID_N_INSET                          = ::WID_N_INSET,                          ///< Inset around the viewport in the window. Only used in small news items.
		WID_N_VIEWPORT                       = ::WID_N_VIEWPORT,                       ///< Viewport in the window.
		WID_N_COMPANY_MSG                    = ::WID_N_COMPANY_MSG,                    ///< Message in company news items.
		WID_N_MESSAGE                        = ::WID_N_MESSAGE,                        ///< Space for displaying the message. Only used in small news items.
		WID_N_MGR_FACE                       = ::WID_N_MGR_FACE,                       ///< Face of the manager.
		WID_N_MGR_NAME                       = ::WID_N_MGR_NAME,                       ///< Name of the manager.
		WID_N_VEH_TITLE                      = ::WID_N_VEH_TITLE,                      ///< Vehicle new title.
		WID_N_VEH_BKGND                      = ::WID_N_VEH_BKGND,                      ///< Dark background of new vehicle news.
		WID_N_VEH_NAME                       = ::WID_N_VEH_NAME,                       ///< Name of the new vehicle.
		WID_N_VEH_SPR                        = ::WID_N_VEH_SPR,                        ///< Graphical display of the new vehicle.
		WID_N_VEH_INFO                       = ::WID_N_VEH_INFO,                       ///< Some technical data of the new vehicle.
	};

	/** Widgets of the #MessageHistoryWindow class. */
	enum MessageHistoryWidgets {
		WID_MH_STICKYBOX                     = ::WID_MH_STICKYBOX,                     ///< Stickybox.
		WID_MH_BACKGROUND                    = ::WID_MH_BACKGROUND,                    ///< Background of the window.
		WID_MH_SCROLLBAR                     = ::WID_MH_SCROLLBAR,                     ///< Scrollbar for the list.
	};

	/** Widgets of the #MessageOptionsWindow class. */
	enum MessageOptionWidgets {
		WID_MO_BACKGROUND                    = ::WID_MO_BACKGROUND,                    ///< Background of the window.
		WID_MO_LABEL                         = ::WID_MO_LABEL,                         ///< Top label.
		WID_MO_DROP_SUMMARY                  = ::WID_MO_DROP_SUMMARY,                  ///< Dropdown that adjusts at once the level for all settings.
		WID_MO_LABEL_SUMMARY                 = ::WID_MO_LABEL_SUMMARY,                 ///< Label of the summary drop down.
		WID_MO_SOUNDTICKER                   = ::WID_MO_SOUNDTICKER,                   ///< Button for (de)activating sound on events.
		WID_MO_SOUNDTICKER_LABEL             = ::WID_MO_SOUNDTICKER_LABEL,             ///< Label of the soundticker button.
		WID_MO_START_OPTION                  = ::WID_MO_START_OPTION,                  ///< First widget that is part of a group [<][label][>] [description].
		WID_MO_END_OPTION                    = ::WID_MO_END_OPTION,                    ///< First widget after the groups.
	};

	/** Widgets of the #BuildObjectWindow class. */
	enum BuildObjectWidgets {
		WID_BO_CLASS_LIST                    = ::WID_BO_CLASS_LIST,                    ///< The list with classes.
		WID_BO_SCROLLBAR                     = ::WID_BO_SCROLLBAR,                     ///< The scrollbar associated with the list.
		WID_BO_OBJECT_MATRIX                 = ::WID_BO_OBJECT_MATRIX,                 ///< The matrix with preview sprites.
		WID_BO_OBJECT_SPRITE                 = ::WID_BO_OBJECT_SPRITE,                 ///< A preview sprite of the object.
		WID_BO_OBJECT_NAME                   = ::WID_BO_OBJECT_NAME,                   ///< The name of the selected object.
		WID_BO_OBJECT_SIZE                   = ::WID_BO_OBJECT_SIZE,                   ///< The size of the selected object.
		WID_BO_INFO                          = ::WID_BO_INFO,                          ///< Other information about the object (from the NewGRF).
		WID_BO_SELECT_MATRIX                 = ::WID_BO_SELECT_MATRIX,                 ///< Selection preview matrix of objects of a given class.
		WID_BO_SELECT_IMAGE                  = ::WID_BO_SELECT_IMAGE,                  ///< Preview image in the #WID_BO_SELECT_MATRIX.
		WID_BO_SELECT_SCROLL                 = ::WID_BO_SELECT_SCROLL,                 ///< Scrollbar next to the #WID_BO_SELECT_MATRIX.
	};

	/** Widgets of the #OrdersWindow class. */
	enum OrderWidgets {
		WID_O_CAPTION                        = ::WID_O_CAPTION,                        ///< Caption of the window.
		WID_O_TIMETABLE_VIEW                 = ::WID_O_TIMETABLE_VIEW,                 ///< Toggle timetable view.
		WID_O_ORDER_LIST                     = ::WID_O_ORDER_LIST,                     ///< Order list panel.
		WID_O_SCROLLBAR                      = ::WID_O_SCROLLBAR,                      ///< Order list scrollbar.
		WID_O_SKIP                           = ::WID_O_SKIP,                           ///< Skip current order.
		WID_O_DELETE                         = ::WID_O_DELETE,                         ///< Delete selected order.
		WID_O_STOP_SHARING                   = ::WID_O_STOP_SHARING,                   ///< Stop sharing orders.
		WID_O_NON_STOP                       = ::WID_O_NON_STOP,                       ///< Goto non-stop to destination.
		WID_O_GOTO                           = ::WID_O_GOTO,                           ///< Goto destination.
		WID_O_FULL_LOAD                      = ::WID_O_FULL_LOAD,                      ///< Select full load.
		WID_O_UNLOAD                         = ::WID_O_UNLOAD,                         ///< Select unload.
		WID_O_REFIT                          = ::WID_O_REFIT,                          ///< Select refit.
		WID_O_SERVICE                        = ::WID_O_SERVICE,                        ///< Select service (at depot).
		WID_O_EMPTY                          = ::WID_O_EMPTY,                          ///< Placeholder for refit dropdown when not owner.
		WID_O_REFIT_DROPDOWN                 = ::WID_O_REFIT_DROPDOWN,                 ///< Open refit options.
		WID_O_COND_VARIABLE                  = ::WID_O_COND_VARIABLE,                  ///< Choose condition variable.
		WID_O_COND_COMPARATOR                = ::WID_O_COND_COMPARATOR,                ///< Choose condition type.
		WID_O_COND_VALUE                     = ::WID_O_COND_VALUE,                     ///< Choose condition value.
		WID_O_SEL_TOP_LEFT                   = ::WID_O_SEL_TOP_LEFT,                   ///< #NWID_SELECTION widget for left part of the top row of the 'your train' order window.
		WID_O_SEL_TOP_MIDDLE                 = ::WID_O_SEL_TOP_MIDDLE,                 ///< #NWID_SELECTION widget for middle part of the top row of the 'your train' order window.
		WID_O_SEL_TOP_RIGHT                  = ::WID_O_SEL_TOP_RIGHT,                  ///< #NWID_SELECTION widget for right part of the top row of the 'your train' order window.
		WID_O_SEL_TOP_ROW_GROUNDVEHICLE      = ::WID_O_SEL_TOP_ROW_GROUNDVEHICLE,      ///< #NWID_SELECTION widget for the top row of the 'your train' order window.
		WID_O_SEL_TOP_ROW                    = ::WID_O_SEL_TOP_ROW,                    ///< #NWID_SELECTION widget for the top row of the 'your non-trains' order window.
		WID_O_SEL_BOTTOM_MIDDLE              = ::WID_O_SEL_BOTTOM_MIDDLE,              ///< #NWID_SELECTION widget for the middle part of the bottom row of the 'your train' order window.
		WID_O_SHARED_ORDER_LIST              = ::WID_O_SHARED_ORDER_LIST,              ///< Open list of shared vehicles.
	};

	/** Widgets of the #OskWindow class. */
	enum OnScreenKeyboardWidgets {
		WID_OSK_CAPTION                      = ::WID_OSK_CAPTION,                      ///< Caption of window.
		WID_OSK_TEXT                         = ::WID_OSK_TEXT,                         ///< Edit box.
		WID_OSK_CANCEL                       = ::WID_OSK_CANCEL,                       ///< Cancel key.
		WID_OSK_OK                           = ::WID_OSK_OK,                           ///< Ok key.
		WID_OSK_BACKSPACE                    = ::WID_OSK_BACKSPACE,                    ///< Backspace key.
		WID_OSK_SPECIAL                      = ::WID_OSK_SPECIAL,                      ///< Special key (at keyborads often used for tab key).
		WID_OSK_CAPS                         = ::WID_OSK_CAPS,                         ///< Capslock key.
		WID_OSK_SHIFT                        = ::WID_OSK_SHIFT,                        ///< Shift(lock) key.
		WID_OSK_SPACE                        = ::WID_OSK_SPACE,                        ///< Space bar.
		WID_OSK_LEFT                         = ::WID_OSK_LEFT,                         ///< Cursor left key.
		WID_OSK_RIGHT                        = ::WID_OSK_RIGHT,                        ///< Cursor right key.
		WID_OSK_LETTERS                      = ::WID_OSK_LETTERS,                      ///< First widget of the 'normal' keys.
		WID_OSK_NUMBERS_FIRST                = ::WID_OSK_NUMBERS_FIRST,                ///< First widget of the numbers row.
		WID_OSK_NUMBERS_LAST                 = ::WID_OSK_NUMBERS_LAST,                 ///< Last widget of the numbers row.
		WID_OSK_QWERTY_FIRST                 = ::WID_OSK_QWERTY_FIRST,                 ///< First widget of the qwerty row.
		WID_OSK_QWERTY_LAST                  = ::WID_OSK_QWERTY_LAST,                  ///< Last widget of the qwerty row.
		WID_OSK_ASDFG_FIRST                  = ::WID_OSK_ASDFG_FIRST,                  ///< First widget of the asdfg row.
		WID_OSK_ASDFG_LAST                   = ::WID_OSK_ASDFG_LAST,                   ///< Last widget of the asdfg row.
		WID_OSK_ZXCVB_FIRST                  = ::WID_OSK_ZXCVB_FIRST,                  ///< First widget of the zxcvb row.
		WID_OSK_ZXCVB_LAST                   = ::WID_OSK_ZXCVB_LAST,                   ///< Last widget of the zxcvb row.
	};

	/** Widgets of the #BuildRailToolbarWindow ckass. */
	enum RailToolbarWidgets {
		WID_RAT_CAPTION                      = ::WID_RAT_CAPTION,                      ///< Caption of the window.
		WID_RAT_BUILD_NS                     = ::WID_RAT_BUILD_NS,                     ///< Build rail along the game view Y axis.
		WID_RAT_BUILD_X                      = ::WID_RAT_BUILD_X,                      ///< Build rail along the game grid X axis.
		WID_RAT_BUILD_EW                     = ::WID_RAT_BUILD_EW,                     ///< Build rail along the game view X axis.
		WID_RAT_BUILD_Y                      = ::WID_RAT_BUILD_Y,                      ///< Build rail along the game grid Y axis.
		WID_RAT_AUTORAIL                     = ::WID_RAT_AUTORAIL,                     ///< Autorail tool.
		WID_RAT_DEMOLISH                     = ::WID_RAT_DEMOLISH,                     ///< Destroy something with dynamite!
		WID_RAT_BUILD_DEPOT                  = ::WID_RAT_BUILD_DEPOT,                  ///< Build a depot.
		WID_RAT_BUILD_WAYPOINT               = ::WID_RAT_BUILD_WAYPOINT,               ///< Build a waypoint.
		WID_RAT_BUILD_STATION                = ::WID_RAT_BUILD_STATION,                ///< Build a station.
		WID_RAT_BUILD_SIGNALS                = ::WID_RAT_BUILD_SIGNALS,                ///< Build signals.
		WID_RAT_BUILD_BRIDGE                 = ::WID_RAT_BUILD_BRIDGE,                 ///< Build a bridge.
		WID_RAT_BUILD_TUNNEL                 = ::WID_RAT_BUILD_TUNNEL,                 ///< Build a tunnel.
		WID_RAT_REMOVE                       = ::WID_RAT_REMOVE,                       ///< Bulldozer to remove rail.
		WID_RAT_CONVERT_RAIL                 = ::WID_RAT_CONVERT_RAIL,                 ///< Convert other rail to this type.
	};

	/** Widgets of the #BuildRailStationWindow class. */
	enum BuildRailStationWidgets {
		WID_BRAS_PLATFORM_DIR_X              = ::WID_BRAS_PLATFORM_DIR_X,              ///< Button to select '/' view.
		WID_BRAS_PLATFORM_DIR_Y              = ::WID_BRAS_PLATFORM_DIR_Y,              ///< Button to select '\' view.
		WID_BRAS_PLATFORM_NUM_1              = ::WID_BRAS_PLATFORM_NUM_1,              ///< Button to select stations with a single platform.
		WID_BRAS_PLATFORM_NUM_2              = ::WID_BRAS_PLATFORM_NUM_2,              ///< Button to select stations with 2 platforms.
		WID_BRAS_PLATFORM_NUM_3              = ::WID_BRAS_PLATFORM_NUM_3,              ///< Button to select stations with 3 platforms.
		WID_BRAS_PLATFORM_NUM_4              = ::WID_BRAS_PLATFORM_NUM_4,              ///< Button to select stations with 4 platforms.
		WID_BRAS_PLATFORM_NUM_5              = ::WID_BRAS_PLATFORM_NUM_5,              ///< Button to select stations with 5 platforms.
		WID_BRAS_PLATFORM_NUM_6              = ::WID_BRAS_PLATFORM_NUM_6,              ///< Button to select stations with 6 platforms.
		WID_BRAS_PLATFORM_NUM_7              = ::WID_BRAS_PLATFORM_NUM_7,              ///< Button to select stations with 7 platforms.
		WID_BRAS_PLATFORM_LEN_1              = ::WID_BRAS_PLATFORM_LEN_1,              ///< Button to select single tile length station platforms.
		WID_BRAS_PLATFORM_LEN_2              = ::WID_BRAS_PLATFORM_LEN_2,              ///< Button to select 2 tiles length station platforms.
		WID_BRAS_PLATFORM_LEN_3              = ::WID_BRAS_PLATFORM_LEN_3,              ///< Button to select 3 tiles length station platforms.
		WID_BRAS_PLATFORM_LEN_4              = ::WID_BRAS_PLATFORM_LEN_4,              ///< Button to select 4 tiles length station platforms.
		WID_BRAS_PLATFORM_LEN_5              = ::WID_BRAS_PLATFORM_LEN_5,              ///< Button to select 5 tiles length station platforms.
		WID_BRAS_PLATFORM_LEN_6              = ::WID_BRAS_PLATFORM_LEN_6,              ///< Button to select 6 tiles length station platforms.
		WID_BRAS_PLATFORM_LEN_7              = ::WID_BRAS_PLATFORM_LEN_7,              ///< Button to select 7 tiles length station platforms.
		WID_BRAS_PLATFORM_DRAG_N_DROP        = ::WID_BRAS_PLATFORM_DRAG_N_DROP,        ///< Button to enable drag and drop type station placement.
		WID_BRAS_HIGHLIGHT_OFF               = ::WID_BRAS_HIGHLIGHT_OFF,               ///< Button for turning coverage highlighting off.
		WID_BRAS_HIGHLIGHT_ON                = ::WID_BRAS_HIGHLIGHT_ON,                ///< Button for turning coverage highlighting on.
		WID_BRAS_COVERAGE_TEXTS              = ::WID_BRAS_COVERAGE_TEXTS,              ///< Empty space for the coverage texts.
		WID_BRAS_MATRIX                      = ::WID_BRAS_MATRIX,                      ///< Matrix widget displaying the available stations.
		WID_BRAS_IMAGE                       = ::WID_BRAS_IMAGE,                       ///< Panel used at each cell of the matrix.
		WID_BRAS_MATRIX_SCROLL               = ::WID_BRAS_MATRIX_SCROLL,               ///< Scrollbar of the matrix widget.
		WID_BRAS_SHOW_NEWST_ADDITIONS        = ::WID_BRAS_SHOW_NEWST_ADDITIONS,        ///< Selection for newstation class selection list.
		WID_BRAS_SHOW_NEWST_MATRIX           = ::WID_BRAS_SHOW_NEWST_MATRIX,           ///< Selection for newstation image matrix.
		WID_BRAS_SHOW_NEWST_RESIZE           = ::WID_BRAS_SHOW_NEWST_RESIZE,           ///< Selection for panel and resize at bottom right for newstation.
		WID_BRAS_SHOW_NEWST_TYPE             = ::WID_BRAS_SHOW_NEWST_TYPE,             ///< Display of selected station type.
		WID_BRAS_NEWST_LIST                  = ::WID_BRAS_NEWST_LIST,                  ///< List with available newstation classes.
		WID_BRAS_NEWST_SCROLL                = ::WID_BRAS_NEWST_SCROLL,                ///< Scrollbar of the #WID_BRAS_NEWST_LIST.
		WID_BRAS_PLATFORM_NUM_BEGIN          = ::WID_BRAS_PLATFORM_NUM_BEGIN,          ///< Helper for determining the chosen platform width.
		WID_BRAS_PLATFORM_LEN_BEGIN          = ::WID_BRAS_PLATFORM_LEN_BEGIN,          ///< Helper for determining the chosen platform length.
	};

	/** Widgets of the #BuildSignalWindow class. */
	enum BuildSignalWidgets {
		WID_BS_SEMAPHORE_NORM                = ::WID_BS_SEMAPHORE_NORM,                ///< Build a semaphore normal block signal
		WID_BS_SEMAPHORE_ENTRY               = ::WID_BS_SEMAPHORE_ENTRY,               ///< Build a semaphore entry block signal
		WID_BS_SEMAPHORE_EXIT                = ::WID_BS_SEMAPHORE_EXIT,                ///< Build a semaphore exit block signal
		WID_BS_SEMAPHORE_COMBO               = ::WID_BS_SEMAPHORE_COMBO,               ///< Build a semaphore combo block signal
		WID_BS_SEMAPHORE_PBS                 = ::WID_BS_SEMAPHORE_PBS,                 ///< Build a semaphore path signal.
		WID_BS_SEMAPHORE_PBS_OWAY            = ::WID_BS_SEMAPHORE_PBS_OWAY,            ///< Build a semaphore one way path signal.
		WID_BS_ELECTRIC_NORM                 = ::WID_BS_ELECTRIC_NORM,                 ///< Build an electric normal block signal
		WID_BS_ELECTRIC_ENTRY                = ::WID_BS_ELECTRIC_ENTRY,                ///< Build an electric entry block signal
		WID_BS_ELECTRIC_EXIT                 = ::WID_BS_ELECTRIC_EXIT,                 ///< Build an electric exit block signal
		WID_BS_ELECTRIC_COMBO                = ::WID_BS_ELECTRIC_COMBO,                ///< Build an electric combo block signal
		WID_BS_ELECTRIC_PBS                  = ::WID_BS_ELECTRIC_PBS,                  ///< Build an electric path signal.
		WID_BS_ELECTRIC_PBS_OWAY             = ::WID_BS_ELECTRIC_PBS_OWAY,             ///< Build an electric one way path signal.
		WID_BS_CONVERT                       = ::WID_BS_CONVERT,                       ///< Convert the signal.
		WID_BS_DRAG_SIGNALS_DENSITY_LABEL    = ::WID_BS_DRAG_SIGNALS_DENSITY_LABEL,    ///< The current signal density.
		WID_BS_DRAG_SIGNALS_DENSITY_DECREASE = ::WID_BS_DRAG_SIGNALS_DENSITY_DECREASE, ///< Decrease the signal density.
		WID_BS_DRAG_SIGNALS_DENSITY_INCREASE = ::WID_BS_DRAG_SIGNALS_DENSITY_INCREASE, ///< Increase the signal density.
	};

	/** Widgets of the #BuildRailDepotWindow class. */
	enum BuildRailDepotWidgets {
		WID_BRAD_DEPOT_NE                    = ::WID_BRAD_DEPOT_NE,                    ///< Build a depot with the entrace in the north east.
		WID_BRAD_DEPOT_SE                    = ::WID_BRAD_DEPOT_SE,                    ///< Build a depot with the entrace in the south east.
		WID_BRAD_DEPOT_SW                    = ::WID_BRAD_DEPOT_SW,                    ///< Build a depot with the entrace in the south west.
		WID_BRAD_DEPOT_NW                    = ::WID_BRAD_DEPOT_NW,                    ///< Build a depot with the entrace in the north west.
	};

	/** Widgets of the #BuildRailWaypointWindow class. */
	enum BuildRailWaypointWidgets {
		WID_BRW_WAYPOINT_MATRIX              = ::WID_BRW_WAYPOINT_MATRIX,              ///< Matrix with waypoints.
		WID_BRW_WAYPOINT                     = ::WID_BRW_WAYPOINT,                     ///< A single waypoint.
		WID_BRW_SCROLL                       = ::WID_BRW_SCROLL,                       ///< Scrollbar for the matrix.
	};

	/** Widgets of the #BuildRoadToolbarWindow class. */
	enum RoadToolbarWidgets {
		WID_ROT_ROAD_X                       = ::WID_ROT_ROAD_X,                       ///< Build road in x-direction.
		WID_ROT_ROAD_Y                       = ::WID_ROT_ROAD_Y,                       ///< Build road in y-direction.
		WID_ROT_AUTOROAD                     = ::WID_ROT_AUTOROAD,                     ///< Autorail.
		WID_ROT_DEMOLISH                     = ::WID_ROT_DEMOLISH,                     ///< Demolish.
		WID_ROT_DEPOT                        = ::WID_ROT_DEPOT,                        ///< Build depot.
		WID_ROT_BUS_STATION                  = ::WID_ROT_BUS_STATION,                  ///< Build bus station.
		WID_ROT_TRUCK_STATION                = ::WID_ROT_TRUCK_STATION,                ///< Build truck station.
		WID_ROT_ONE_WAY                      = ::WID_ROT_ONE_WAY,                      ///< Build one-way road.
		WID_ROT_BUILD_BRIDGE                 = ::WID_ROT_BUILD_BRIDGE,                 ///< Build bridge.
		WID_ROT_BUILD_TUNNEL                 = ::WID_ROT_BUILD_TUNNEL,                 ///< Build tunnel.
		WID_ROT_REMOVE                       = ::WID_ROT_REMOVE,                       ///< Remove road.
	};

	/** Widgets of the #BuildRoadDepotWindow class. */
	enum BuildRoadDepotWidgets {
		WID_BROD_CAPTION                     = ::WID_BROD_CAPTION,                     ///< Caption of the window.
		WID_BROD_DEPOT_NE                    = ::WID_BROD_DEPOT_NE,                    ///< Depot with NE entry.
		WID_BROD_DEPOT_SE                    = ::WID_BROD_DEPOT_SE,                    ///< Depot with SE entry.
		WID_BROD_DEPOT_SW                    = ::WID_BROD_DEPOT_SW,                    ///< Depot with SW entry.
		WID_BROD_DEPOT_NW                    = ::WID_BROD_DEPOT_NW,                    ///< Depot with NW entry.
	};

	/** Widgets of the #BuildRoadStationWindow class. */
	enum BuildRoadStationWidgets {
		WID_BROS_CAPTION                     = ::WID_BROS_CAPTION,                     ///< Caption of the window.
		WID_BROS_BACKGROUND                  = ::WID_BROS_BACKGROUND,                  ///< Background of the window.
		WID_BROS_STATION_NE                  = ::WID_BROS_STATION_NE,                  ///< Terminal station with NE entry.
		WID_BROS_STATION_SE                  = ::WID_BROS_STATION_SE,                  ///< Terminal station with SE entry.
		WID_BROS_STATION_SW                  = ::WID_BROS_STATION_SW,                  ///< Terminal station with SW entry.
		WID_BROS_STATION_NW                  = ::WID_BROS_STATION_NW,                  ///< Terminal station with NW entry.
		WID_BROS_STATION_X                   = ::WID_BROS_STATION_X,                   ///< Drive-through station in x-direction.
		WID_BROS_STATION_Y                   = ::WID_BROS_STATION_Y,                   ///< Drive-through station in y-direction.
		WID_BROS_LT_OFF                      = ::WID_BROS_LT_OFF,                      ///< Turn off area highlight.
		WID_BROS_LT_ON                       = ::WID_BROS_LT_ON,                       ///< Turn on area highlight.
		WID_BROS_INFO                        = ::WID_BROS_INFO,                        ///< Station acceptance info.
	};

	/** Widgets of the #GameOptionsWindow class. */
	enum GameOptionsWidgets {
		WID_GO_BACKGROUND                    = ::WID_GO_BACKGROUND,                    ///< Background of the window.
		WID_GO_CURRENCY_DROPDOWN             = ::WID_GO_CURRENCY_DROPDOWN,             ///< Currency dropdown.
		WID_GO_DISTANCE_DROPDOWN             = ::WID_GO_DISTANCE_DROPDOWN,             ///< Measuring unit dropdown.
		WID_GO_ROADSIDE_DROPDOWN             = ::WID_GO_ROADSIDE_DROPDOWN,             ///< Dropdown to select the road side (to set the right side ;)).
		WID_GO_TOWNNAME_DROPDOWN             = ::WID_GO_TOWNNAME_DROPDOWN,             ///< Town name dropdown.
		WID_GO_AUTOSAVE_DROPDOWN             = ::WID_GO_AUTOSAVE_DROPDOWN,             ///< Dropdown to say how often to autosave.
		WID_GO_LANG_DROPDOWN                 = ::WID_GO_LANG_DROPDOWN,                 ///< Language dropdown.
		WID_GO_RESOLUTION_DROPDOWN           = ::WID_GO_RESOLUTION_DROPDOWN,           ///< Dropdown for the resolution.
		WID_GO_FULLSCREEN_BUTTON             = ::WID_GO_FULLSCREEN_BUTTON,             ///< Toggle fullscreen.
		WID_GO_SCREENSHOT_DROPDOWN           = ::WID_GO_SCREENSHOT_DROPDOWN,           ///< Select the screenshot type... please use PNG!.
		WID_GO_BASE_GRF_DROPDOWN             = ::WID_GO_BASE_GRF_DROPDOWN,             ///< Use to select a base GRF.
		WID_GO_BASE_GRF_STATUS               = ::WID_GO_BASE_GRF_STATUS,               ///< Info about missing files etc.
		WID_GO_BASE_GRF_DESCRIPTION          = ::WID_GO_BASE_GRF_DESCRIPTION,          ///< Description of selected base GRF.
		WID_GO_BASE_SFX_DROPDOWN             = ::WID_GO_BASE_SFX_DROPDOWN,             ///< Use to select a base SFX.
		WID_GO_BASE_SFX_DESCRIPTION          = ::WID_GO_BASE_SFX_DESCRIPTION,          ///< Description of selected base SFX.
		WID_GO_BASE_MUSIC_DROPDOWN           = ::WID_GO_BASE_MUSIC_DROPDOWN,           ///< Use to select a base music set.
		WID_GO_BASE_MUSIC_STATUS             = ::WID_GO_BASE_MUSIC_STATUS,             ///< Info about corrupted files etc.
		WID_GO_BASE_MUSIC_DESCRIPTION        = ::WID_GO_BASE_MUSIC_DESCRIPTION,        ///< Description of selected base music set.
	};

	/** Widgets of the #GameDifficultyWindow class. */
	enum GameDifficultyWidgets {
		WID_GD_LVL_EASY                      = ::WID_GD_LVL_EASY,                      ///< Easy level button.
		WID_GD_LVL_MEDIUM                    = ::WID_GD_LVL_MEDIUM,                    ///< Medium level button.
		WID_GD_LVL_HARD                      = ::WID_GD_LVL_HARD,                      ///< Hard level button.
		WID_GD_LVL_CUSTOM                    = ::WID_GD_LVL_CUSTOM,                    ///< Custom level button.
		WID_GD_HIGHSCORE                     = ::WID_GD_HIGHSCORE,                     ///< Highscore button.
		WID_GD_ACCEPT                        = ::WID_GD_ACCEPT,                        ///< Accept button.
		WID_GD_CANCEL                        = ::WID_GD_CANCEL,                        ///< Cancel button.
		WID_GD_OPTIONS_START                 = ::WID_GD_OPTIONS_START,                 ///< Start of the options.
	};

	/** Widgets of the #GameSettingsWindow class. */
	enum GameSettingsWidgets {
		WID_GS_OPTIONSPANEL                  = ::WID_GS_OPTIONSPANEL,                  ///< Panel widget containing the option lists.
		WID_GS_SCROLLBAR                     = ::WID_GS_SCROLLBAR,                     ///< Scrollbar.
		WID_GS_HELP_TEXT                     = ::WID_GS_HELP_TEXT,                     ///< Information area to display help text of the selected option.
	};

	/** Widgets of the #CustomCurrencyWindow class. */
	enum CustomCurrencyWidgets {
		WID_CC_RATE_DOWN                     = ::WID_CC_RATE_DOWN,                     ///< Down button.
		WID_CC_RATE_UP                       = ::WID_CC_RATE_UP,                       ///< Up button.
		WID_CC_RATE                          = ::WID_CC_RATE,                          ///< Rate of currency.
		WID_CC_SEPARATOR_EDIT                = ::WID_CC_SEPARATOR_EDIT,                ///< Seperator edit button.
		WID_CC_SEPARATOR                     = ::WID_CC_SEPARATOR,                     ///< Current seperator.
		WID_CC_PREFIX_EDIT                   = ::WID_CC_PREFIX_EDIT,                   ///< Prefix edit button.
		WID_CC_PREFIX                        = ::WID_CC_PREFIX,                        ///< Current prefix.
		WID_CC_SUFFIX_EDIT                   = ::WID_CC_SUFFIX_EDIT,                   ///< Suffix edit button.
		WID_CC_SUFFIX                        = ::WID_CC_SUFFIX,                        ///< Current suffix.
		WID_CC_YEAR_DOWN                     = ::WID_CC_YEAR_DOWN,                     ///< Down button.
		WID_CC_YEAR_UP                       = ::WID_CC_YEAR_UP,                       ///< Up button.
		WID_CC_YEAR                          = ::WID_CC_YEAR,                          ///< Year of introduction.
		WID_CC_PREVIEW                       = ::WID_CC_PREVIEW,                       ///< Preview.
	};

	/** Widgets of the #SignListWindow class. */
	enum SignListWidgets {
		WID_SIL_CAPTION                      = ::WID_SIL_CAPTION,                      ///< Caption of the window.
		WID_SIL_LIST                         = ::WID_SIL_LIST,                         ///< List of signs.
		WID_SIL_SCROLLBAR                    = ::WID_SIL_SCROLLBAR,                    ///< Scrollbar of list.
		WID_SIL_FILTER_TEXT                  = ::WID_SIL_FILTER_TEXT,                  ///< Text box for typing a filter string.
		WID_SIL_FILTER_MATCH_CASE_BTN        = ::WID_SIL_FILTER_MATCH_CASE_BTN,        ///< Button to toggle if case sensitive filtering should be used.
		WID_SIL_FILTER_CLEAR_BTN             = ::WID_SIL_FILTER_CLEAR_BTN,             ///< Button to clear the filter.
	};

	/** Widgets of the #SignWindow class. */
	enum QueryEditSignWidgets {
		WID_QES_CAPTION                      = ::WID_QES_CAPTION,                      ///< Caption of the window.
		WID_QES_TEXT                         = ::WID_QES_TEXT,                         ///< Text of the query.
		WID_QES_OK                           = ::WID_QES_OK,                           ///< OK button.
		WID_QES_CANCEL                       = ::WID_QES_CANCEL,                       ///< Cancel button.
		WID_QES_DELETE                       = ::WID_QES_DELETE,                       ///< Delete button.
		WID_QES_PREVIOUS                     = ::WID_QES_PREVIOUS,                     ///< Previous button.
		WID_QES_NEXT                         = ::WID_QES_NEXT,                         ///< Next button.
	};

	/** Widgets of the #SmallMapWindow class. */
	enum SmallMapWidgets {
		WID_SM_CAPTION                       = ::WID_SM_CAPTION,                       ///< Caption of the window.
		WID_SM_MAP_BORDER                    = ::WID_SM_MAP_BORDER,                    ///< Border around the smallmap.
		WID_SM_MAP                           = ::WID_SM_MAP,                           ///< Panel containing the smallmap.
		WID_SM_LEGEND                        = ::WID_SM_LEGEND,                        ///< Bottom panel to display smallmap legends.
		WID_SM_ZOOM_IN                       = ::WID_SM_ZOOM_IN,                       ///< Button to zoom in one step.
		WID_SM_ZOOM_OUT                      = ::WID_SM_ZOOM_OUT,                      ///< Button to zoom out one step.
		WID_SM_CONTOUR                       = ::WID_SM_CONTOUR,                       ///< Button to select the contour view (height map).
		WID_SM_VEHICLES                      = ::WID_SM_VEHICLES,                      ///< Button to select the vehicles view.
		WID_SM_INDUSTRIES                    = ::WID_SM_INDUSTRIES,                    ///< Button to select the industries view.
		WID_SM_ROUTES                        = ::WID_SM_ROUTES,                        ///< Button to select the routes view.
		WID_SM_VEGETATION                    = ::WID_SM_VEGETATION,                    ///< Button to select the vegetation view.
		WID_SM_OWNERS                        = ::WID_SM_OWNERS,                        ///< Button to select the owners view.
		WID_SM_CENTERMAP                     = ::WID_SM_CENTERMAP,                     ///< Button to move smallmap center to main window center.
		WID_SM_TOGGLETOWNNAME                = ::WID_SM_TOGGLETOWNNAME,                ///< Toggle button to display town names.
		WID_SM_SELECT_BUTTONS                = ::WID_SM_SELECT_BUTTONS,                ///< Selection widget for the buttons present in some smallmap modes.
		WID_SM_ENABLE_ALL                    = ::WID_SM_ENABLE_ALL,                    ///< Button to enable display of all legend entries.
		WID_SM_DISABLE_ALL                   = ::WID_SM_DISABLE_ALL,                   ///< Button to disable display of all legend entries.
		WID_SM_SHOW_HEIGHT                   = ::WID_SM_SHOW_HEIGHT,                   ///< Show heightmap toggle button.
	};

	/** Widgets of the #StationViewWindow class. */
	enum StationViewWidgets {
		WID_SV_CAPTION                       = ::WID_SV_CAPTION,                       ///< Caption of the window.
		WID_SV_WAITING                       = ::WID_SV_WAITING,                       ///< List of waiting cargo.
		WID_SV_SCROLLBAR                     = ::WID_SV_SCROLLBAR,                     ///< Scrollbar.
		WID_SV_ACCEPT_RATING_LIST            = ::WID_SV_ACCEPT_RATING_LIST,            ///< List of accepted cargoes / rating of cargoes.
		WID_SV_LOCATION                      = ::WID_SV_LOCATION,                      ///< 'Location' button.
		WID_SV_ACCEPTS_RATINGS               = ::WID_SV_ACCEPTS_RATINGS,               ///< 'Accepts' / 'Ratings' button.
		WID_SV_RENAME                        = ::WID_SV_RENAME,                        ///< 'Rename' button.
		WID_SV_CLOSE_AIRPORT                 = ::WID_SV_CLOSE_AIRPORT,                 ///< 'Close airport' button.
		WID_SV_TRAINS                        = ::WID_SV_TRAINS,                        ///< List of scheduled trains button.
		WID_SV_ROADVEHS                      = ::WID_SV_ROADVEHS,                      ///< List of scheduled road vehs button.
		WID_SV_SHIPS                         = ::WID_SV_SHIPS,                         ///< List of scheduled ships button.
		WID_SV_PLANES                        = ::WID_SV_PLANES,                        ///< List of scheduled planes button.
	};

	/** Widgets of the #CompanyStationsWindow class. */
	enum StationListWidgets {
		WID_STL_CAPTION                      = ::WID_STL_CAPTION,                      ///< Caption of the window.
		WID_STL_LIST                         = ::WID_STL_LIST,                         ///< The main panel, list of stations.
		WID_STL_SCROLLBAR                    = ::WID_STL_SCROLLBAR,                    ///< Scrollbar next to the main panel.
		WID_STL_TRAIN                        = ::WID_STL_TRAIN,                        ///< 'TRAIN' button - list only facilities where is a railroad station.
		WID_STL_TRUCK                        = ::WID_STL_TRUCK,                        ///< 'TRUCK' button - list only facilities where is a truck stop.
		WID_STL_BUS                          = ::WID_STL_BUS,                          ///< 'BUS' button - list only facilities where is a bus stop.
		WID_STL_AIRPLANE                     = ::WID_STL_AIRPLANE,                     ///< 'AIRPLANE' button - list only facilities where is an airport.
		WID_STL_SHIP                         = ::WID_STL_SHIP,                         ///< 'SHIP' button - list only facilities where is a dock.
		WID_STL_FACILALL                     = ::WID_STL_FACILALL,                     ///< 'ALL' button - list all facilities.
		WID_STL_NOCARGOWAITING               = ::WID_STL_NOCARGOWAITING,               ///< 'NO' button - list stations where no cargo is waiting.
		WID_STL_CARGOALL                     = ::WID_STL_CARGOALL,                     ///< 'ALL' button - list all stations.
		WID_STL_SORTBY                       = ::WID_STL_SORTBY,                       ///< 'Sort by' button - reverse sort direction.
		WID_STL_SORTDROPBTN                  = ::WID_STL_SORTDROPBTN,                  ///< Dropdown button.
		WID_STL_CARGOSTART                   = ::WID_STL_CARGOSTART,                   ///< Widget numbers used for list of cargo types (not present in _company_stations_widgets).
	};

	/** Widgets of the #SelectStationWindow class. */
	enum JoinStationWidgets {
		WID_JS_CAPTION                       = ::WID_JS_CAPTION,                       // Caption of the window.
		WID_JS_PANEL                         = ::WID_JS_PANEL,                         // Main panel.
		WID_JS_SCROLLBAR                     = ::WID_JS_SCROLLBAR,                     // Scrollbar of the panel.
	};

	/** Widgets of the #StatusBarWindow class. */
	enum StatusbarWidget {
		WID_S_LEFT                           = ::WID_S_LEFT,                           ///< Left part of the statusbar; date is shown there.
		WID_S_MIDDLE                         = ::WID_S_MIDDLE,                         ///< Middle part; current news or company name or *** SAVING *** or *** PAUSED ***.
		WID_S_RIGHT                          = ::WID_S_RIGHT,                          ///< Right part; bank balance.
	};

	/** Widgets of the #SubsidyListWindow class. */
	enum SubsidyListWidgets {
		WID_SUL_PANEL                        = ::WID_SUL_PANEL,                        ///< Main panel of window.
		WID_SUL_SCROLLBAR                    = ::WID_SUL_SCROLLBAR,                    ///< Scrollbar of panel.
	};

	/** Widgets of the #TerraformToolbarWindow class. */
	enum TerraformToolbarWidgets {
		WID_TT_SHOW_PLACE_OBJECT             = ::WID_TT_SHOW_PLACE_OBJECT,             ///< Should the place object button be shown?
		WID_TT_BUTTONS_START                 = ::WID_TT_BUTTONS_START,                 ///< Start of pushable buttons.
		WID_TT_LOWER_LAND                    = ::WID_TT_LOWER_LAND,                    ///< Lower land button.
		WID_TT_RAISE_LAND                    = ::WID_TT_RAISE_LAND,                    ///< Raise land button.
		WID_TT_LEVEL_LAND                    = ::WID_TT_LEVEL_LAND,                    ///< Level land button.
		WID_TT_DEMOLISH                      = ::WID_TT_DEMOLISH,                      ///< Demolish aka dynamite button.
		WID_TT_BUY_LAND                      = ::WID_TT_BUY_LAND,                      ///< Buy land button.
		WID_TT_PLANT_TREES                   = ::WID_TT_PLANT_TREES,                   ///< Plant trees button (note: opens seperate window, no place-push-button).
		WID_TT_PLACE_SIGN                    = ::WID_TT_PLACE_SIGN,                    ///< Place sign button.
		WID_TT_PLACE_OBJECT                  = ::WID_TT_PLACE_OBJECT,                  ///< Place object button.
	};

	/** Widgets of the #ScenarioEditorLandscapeGenerationWindow class. */
	enum EditorTerraformToolbarWidgets {
		WID_ETT_SHOW_PLACE_DESERT            = ::WID_ETT_SHOW_PLACE_DESERT,            ///< Should the place desert button be shown?
		WID_ETT_START                        = ::WID_ETT_START,                        ///< Used for iterations.
		WID_ETT_DOTS                         = ::WID_ETT_DOTS,                         ///< Invisible widget for rendering the terraform size on.
		WID_ETT_BUTTONS_START                = ::WID_ETT_BUTTONS_START,                ///< Start of pushable buttons.
		WID_ETT_DEMOLISH                     = ::WID_ETT_DEMOLISH,                     ///< Demolish aka dynamite button.
		WID_ETT_LOWER_LAND                   = ::WID_ETT_LOWER_LAND,                   ///< Lower land button.
		WID_ETT_RAISE_LAND                   = ::WID_ETT_RAISE_LAND,                   ///< Raise land button.
		WID_ETT_LEVEL_LAND                   = ::WID_ETT_LEVEL_LAND,                   ///< Level land button.
		WID_ETT_PLACE_ROCKS                  = ::WID_ETT_PLACE_ROCKS,                  ///< Place rocks button.
		WID_ETT_PLACE_DESERT                 = ::WID_ETT_PLACE_DESERT,                 ///< Place desert button (in tropical climate).
		WID_ETT_PLACE_OBJECT                 = ::WID_ETT_PLACE_OBJECT,                 ///< Place transmitter button.
		WID_ETT_BUTTONS_END                  = ::WID_ETT_BUTTONS_END,                  ///< End of pushable buttons.
		WID_ETT_INCREASE_SIZE                = ::WID_ETT_INCREASE_SIZE,                ///< Upwards arrow button to increase terraforming size.
		WID_ETT_DECREASE_SIZE                = ::WID_ETT_DECREASE_SIZE,                ///< Downwards arrow button to decrease terraforming size.
		WID_ETT_NEW_SCENARIO                 = ::WID_ETT_NEW_SCENARIO,                 ///< Button for generating a new scenario.
		WID_ETT_RESET_LANDSCAPE              = ::WID_ETT_RESET_LANDSCAPE,              ///< Button for removing all company-owned property.
	};

	/** Widgets of the #TimetableWindow class. */
	enum VehicleTimetableWidgets {
		WID_VT_CAPTION                       = ::WID_VT_CAPTION,                       ///< Caption of the window.
		WID_VT_ORDER_VIEW                    = ::WID_VT_ORDER_VIEW,                    ///< Order view.
		WID_VT_TIMETABLE_PANEL               = ::WID_VT_TIMETABLE_PANEL,               ///< Timetable panel.
		WID_VT_ARRIVAL_DEPARTURE_PANEL       = ::WID_VT_ARRIVAL_DEPARTURE_PANEL,       ///< Panel with the expected/scheduled arrivals.
		WID_VT_SCROLLBAR                     = ::WID_VT_SCROLLBAR,                     ///< Scrollbar for the panel.
		WID_VT_SUMMARY_PANEL                 = ::WID_VT_SUMMARY_PANEL,                 ///< Summary panel.
		WID_VT_START_DATE                    = ::WID_VT_START_DATE,                    ///< Start date button.
		WID_VT_CHANGE_TIME                   = ::WID_VT_CHANGE_TIME,                   ///< Change time button.
		WID_VT_CLEAR_TIME                    = ::WID_VT_CLEAR_TIME,                    ///< Clear time button.
		WID_VT_RESET_LATENESS                = ::WID_VT_RESET_LATENESS,                ///< Reset lateness button.
		WID_VT_AUTOFILL                      = ::WID_VT_AUTOFILL,                      ///< Autofill button.
		WID_VT_EXPECTED                      = ::WID_VT_EXPECTED,                      ///< Toggle between expected and scheduled arrivals.
		WID_VT_SHARED_ORDER_LIST             = ::WID_VT_SHARED_ORDER_LIST,             ///< Show the shared order list.
		WID_VT_ARRIVAL_DEPARTURE_SELECTION   = ::WID_VT_ARRIVAL_DEPARTURE_SELECTION,   ///< Disable/hide the arrival departure panel.
		WID_VT_EXPECTED_SELECTION            = ::WID_VT_EXPECTED_SELECTION,            ///< Disable/hide the expected selection button.
		WID_VT_CHANGE_SPEED                  = ::WID_VT_CHANGE_SPEED,                  ///< Change speed limit button.
		WID_VT_CLEAR_SPEED                   = ::WID_VT_CLEAR_SPEED,                   ///< Clear speed limit button.
	};

	/** Widgets of the #MainToolbarWindow class. */
	enum ToolbarNormalWidgets {
		WID_TN_PAUSE                         = ::WID_TN_PAUSE,                         ///< Pause the game.
		WID_TN_FAST_FORWARD                  = ::WID_TN_FAST_FORWARD,                  ///< Fast forward the game.
		WID_TN_SETTINGS                      = ::WID_TN_SETTINGS,                      ///< Settings menu.
		WID_TN_SAVE                          = ::WID_TN_SAVE,                          ///< Save menu.
		WID_TN_SMALL_MAP                     = ::WID_TN_SMALL_MAP,                     ///< Small map menu.
		WID_TN_TOWNS                         = ::WID_TN_TOWNS,                         ///< Town menu.
		WID_TN_SUBSIDIES                     = ::WID_TN_SUBSIDIES,                     ///< Subsidy menu.
		WID_TN_STATIONS                      = ::WID_TN_STATIONS,                      ///< Station menu.
		WID_TN_FINANCES                      = ::WID_TN_FINANCES,                      ///< Finance menu.
		WID_TN_COMPANIES                     = ::WID_TN_COMPANIES,                     ///< Company menu.
		WID_TN_GRAPHS                        = ::WID_TN_GRAPHS,                        ///< Graph menu.
		WID_TN_LEAGUE                        = ::WID_TN_LEAGUE,                        ///< Company league menu.
		WID_TN_INDUSTRIES                    = ::WID_TN_INDUSTRIES,                    ///< Industry menu.
		WID_TN_VEHICLE_START                 = ::WID_TN_VEHICLE_START,                 ///< Helper for the offset of the vehicle menus.
		WID_TN_TRAINS                        = ::WID_TN_TRAINS,                        ///< Train menu.
		WID_TN_ROADVEHS                      = ::WID_TN_ROADVEHS,                      ///< Road vehicle menu.
		WID_TN_SHIPS                         = ::WID_TN_SHIPS,                         ///< Ship menu.
		WID_TN_AIRCRAFTS                     = ::WID_TN_AIRCRAFTS,                     ///< Aircraft menu.
		WID_TN_ZOOM_IN                       = ::WID_TN_ZOOM_IN,                       ///< Zoom in the main viewport.
		WID_TN_ZOOM_OUT                      = ::WID_TN_ZOOM_OUT,                      ///< Zoom out the main viewport.
		WID_TN_RAILS                         = ::WID_TN_RAILS,                         ///< Rail building menu.
		WID_TN_ROADS                         = ::WID_TN_ROADS,                         ///< Road building menu.
		WID_TN_WATER                         = ::WID_TN_WATER,                         ///< Water building toolbar.
		WID_TN_AIR                           = ::WID_TN_AIR,                           ///< Airport building toolbar.
		WID_TN_LANDSCAPE                     = ::WID_TN_LANDSCAPE,                     ///< Landscaping toolbar.
		WID_TN_MUSIC_SOUND                   = ::WID_TN_MUSIC_SOUND,                   ///< Music/sound configuration menu.
		WID_TN_MESSAGES                      = ::WID_TN_MESSAGES,                      ///< Messages menu.
		WID_TN_HELP                          = ::WID_TN_HELP,                          ///< Help menu.
		WID_TN_SWITCH_BAR                    = ::WID_TN_SWITCH_BAR,                    ///< Only available when toolbar has been split to switch between different subsets.
		WID_TN_END                           = ::WID_TN_END,                           ///< Helper for knowing the amount of widgets.
	};

	/** Widgets of the #ScenarioEditorToolbarWindow class. */
	enum ToolbarEditorWidgets {
		WID_TE_PAUSE                         = ::WID_TE_PAUSE,                         ///< Pause the game.
		WID_TE_FAST_FORWARD                  = ::WID_TE_FAST_FORWARD,                  ///< Fast forward the game.
		WID_TE_SETTINGS                      = ::WID_TE_SETTINGS,                      ///< Settings menu.
		WID_TE_SAVE                          = ::WID_TE_SAVE,                          ///< Save menu.
		WID_TE_SPACER                        = ::WID_TE_SPACER,                        ///< Spacer with "scenario editor" text.
		WID_TE_DATE                          = ::WID_TE_DATE,                          ///< The date of the scenario.
		WID_TE_DATE_BACKWARD                 = ::WID_TE_DATE_BACKWARD,                 ///< Reduce the date of the scenario.
		WID_TE_DATE_FORWARD                  = ::WID_TE_DATE_FORWARD,                  ///< Increase the date of the scenario.
		WID_TE_SMALL_MAP                     = ::WID_TE_SMALL_MAP,                     ///< Small map menu.
		WID_TE_ZOOM_IN                       = ::WID_TE_ZOOM_IN,                       ///< Zoom in the main viewport.
		WID_TE_ZOOM_OUT                      = ::WID_TE_ZOOM_OUT,                      ///< Zoom out the main viewport.
		WID_TE_LAND_GENERATE                 = ::WID_TE_LAND_GENERATE,                 ///< Land generation.
		WID_TE_TOWN_GENERATE                 = ::WID_TE_TOWN_GENERATE,                 ///< Town building window.
		WID_TE_INDUSTRY                      = ::WID_TE_INDUSTRY,                      ///< Industry building window.
		WID_TE_ROADS                         = ::WID_TE_ROADS,                         ///< Road building menu.
		WID_TE_WATER                         = ::WID_TE_WATER,                         ///< Water building toolbar.
		WID_TE_TREES                         = ::WID_TE_TREES,                         ///< Tree building toolbar.
		WID_TE_SIGNS                         = ::WID_TE_SIGNS,                         ///< Sign building.
		WID_TE_DATE_PANEL                    = ::WID_TE_DATE_PANEL,                    ///< Container for the date widgets.
		WID_TE_MUSIC_SOUND                   = ::WID_TE_MUSIC_SOUND,                   ///< Music/sound configuration menu.
		WID_TE_HELP                          = ::WID_TE_HELP,                          ///< Help menu.
		WID_TE_SWITCH_BAR                    = ::WID_TE_SWITCH_BAR,                    ///< Only available when toolbar has been split to switch between different subsets.
	};

	/** Widgets of the #TownDirectoryWindow class. */
	enum TownDirectoryWidgets {
		WID_TD_SORT_NAME                     = ::WID_TD_SORT_NAME,                     ///< Sort by town name.
		WID_TD_SORT_POPULATION               = ::WID_TD_SORT_POPULATION,               ///< Sort by town population.
		WID_TD_LIST                          = ::WID_TD_LIST,                          ///< List of towns.
		WID_TD_SCROLLBAR                     = ::WID_TD_SCROLLBAR,                     ///< Scrollbar for the town list.
		WID_TD_WORLD_POPULATION              = ::WID_TD_WORLD_POPULATION,              ///< The world's population.
	};

	/** Widgets of the #TownAuthorityWindow class. */
	enum TownAuthorityWidgets {
		WID_TA_CAPTION                       = ::WID_TA_CAPTION,                       ///< Caption of window.
		WID_TA_RATING_INFO                   = ::WID_TA_RATING_INFO,                   ///< Overview with ratings for each company.
		WID_TA_COMMAND_LIST                  = ::WID_TA_COMMAND_LIST,                  ///< List of commands for the player.
		WID_TA_SCROLLBAR                     = ::WID_TA_SCROLLBAR,                     ///< Scrollbar of the list of commands.
		WID_TA_ACTION_INFO                   = ::WID_TA_ACTION_INFO,                   ///< Additional information about the action.
		WID_TA_EXECUTE                       = ::WID_TA_EXECUTE,                       ///< Do-it button.
	};

	/** Widgets of the #TownViewWindow class. */
	enum TownViewWidgets {
		WID_TV_CAPTION                       = ::WID_TV_CAPTION,                       ///< Caption of window.
		WID_TV_VIEWPORT                      = ::WID_TV_VIEWPORT,                      ///< View of the center of the town.
		WID_TV_INFO                          = ::WID_TV_INFO,                          ///< General information about the town.
		WID_TV_CENTER_VIEW                   = ::WID_TV_CENTER_VIEW,                   ///< Center the main view on this town.
		WID_TV_SHOW_AUTHORITY                = ::WID_TV_SHOW_AUTHORITY,                ///< Show the town authority window.
		WID_TV_CHANGE_NAME                   = ::WID_TV_CHANGE_NAME,                   ///< Change the name of this town.
		WID_TV_EXPAND                        = ::WID_TV_EXPAND,                        ///< Expand this town (scenario editor only).
		WID_TV_DELETE                        = ::WID_TV_DELETE,                        ///< Delete this town (scenario editor only).
	};

	/** Widgets of the #FoundTownWindow class. */
	enum TownFoundingWidgets {
		WID_TF_NEW_TOWN                      = ::WID_TF_NEW_TOWN,                      ///< Create a new town.
		WID_TF_RANDOM_TOWN                   = ::WID_TF_RANDOM_TOWN,                   ///< Randomly place a town.
		WID_TF_MANY_RANDOM_TOWNS             = ::WID_TF_MANY_RANDOM_TOWNS,             ///< Randomly place many towns.
		WID_TF_TOWN_NAME_EDITBOX             = ::WID_TF_TOWN_NAME_EDITBOX,             ///< Editor for the town name.
		WID_TF_TOWN_NAME_RANDOM              = ::WID_TF_TOWN_NAME_RANDOM,              ///< Generate a random town name.
		WID_TF_SIZE_SMALL                    = ::WID_TF_SIZE_SMALL,                    ///< Selection for a small town.
		WID_TF_SIZE_MEDIUM                   = ::WID_TF_SIZE_MEDIUM,                   ///< Selection for a medium town.
		WID_TF_SIZE_LARGE                    = ::WID_TF_SIZE_LARGE,                    ///< Selection for a large town.
		WID_TF_SIZE_RANDOM                   = ::WID_TF_SIZE_RANDOM,                   ///< Selection for a randomly sized town.
		WID_TF_CITY                          = ::WID_TF_CITY,                          ///< Selection for the town's city state.
		WID_TF_LAYOUT_ORIGINAL               = ::WID_TF_LAYOUT_ORIGINAL,               ///< Selection for the original town layout.
		WID_TF_LAYOUT_BETTER                 = ::WID_TF_LAYOUT_BETTER,                 ///< Selection for the better town layout.
		WID_TF_LAYOUT_GRID2                  = ::WID_TF_LAYOUT_GRID2,                  ///< Selection for the 2x2 grid town layout.
		WID_TF_LAYOUT_GRID3                  = ::WID_TF_LAYOUT_GRID3,                  ///< Selection for the 3x3 grid town layout.
		WID_TF_LAYOUT_RANDOM                 = ::WID_TF_LAYOUT_RANDOM,                 ///< Selection for a randomly chosen town layout.
	};

	/** Widgets of the #TransparenciesWindow class. */
	enum TransparencyToolbarWidgets {
		WID_TT_BEGIN                         = ::WID_TT_BEGIN,                         ///< First toggle button.
		WID_TT_SIGNS                         = ::WID_TT_SIGNS,                         ///< Signs background transparency toggle button.
		WID_TT_TREES                         = ::WID_TT_TREES,                         ///< Trees transparency toggle button.
		WID_TT_HOUSES                        = ::WID_TT_HOUSES,                        ///< Houses transparency toggle button.
		WID_TT_INDUSTRIES                    = ::WID_TT_INDUSTRIES,                    ///< industries transparency toggle button.
		WID_TT_BUILDINGS                     = ::WID_TT_BUILDINGS,                     ///< Company buildings and structures transparency toggle button.
		WID_TT_BRIDGES                       = ::WID_TT_BRIDGES,                       ///< Bridges transparency toggle button.
		WID_TT_STRUCTURES                    = ::WID_TT_STRUCTURES,                    ///< Object structure transparency toggle button.
		WID_TT_CATENARY                      = ::WID_TT_CATENARY,                      ///< Catenary transparency toggle button.
		WID_TT_LOADING                       = ::WID_TT_LOADING,                       ///< Loading indicators transparency toggle button.
		WID_TT_END                           = ::WID_TT_END,                           ///< End of toggle buttons.
		WID_TT_BUTTONS                       = ::WID_TT_BUTTONS,                       ///< Panel with 'invisibility' buttons.
	};

	/** Widgets of the #BuildTreesWindow class. */
	enum BuildTreesWidgets {
		WID_BT_TYPE_11                       = ::WID_BT_TYPE_11,                       ///< Tree 1st column 1st row.
		WID_BT_TYPE_12                       = ::WID_BT_TYPE_12,                       ///< Tree 1st column 2nd row.
		WID_BT_TYPE_13                       = ::WID_BT_TYPE_13,                       ///< Tree 1st column 3rd row.
		WID_BT_TYPE_14                       = ::WID_BT_TYPE_14,                       ///< Tree 1st column 4th row.
		WID_BT_TYPE_21                       = ::WID_BT_TYPE_21,                       ///< Tree 2st column 1st row.
		WID_BT_TYPE_22                       = ::WID_BT_TYPE_22,                       ///< Tree 2st column 2nd row.
		WID_BT_TYPE_23                       = ::WID_BT_TYPE_23,                       ///< Tree 2st column 3rd row.
		WID_BT_TYPE_24                       = ::WID_BT_TYPE_24,                       ///< Tree 2st column 4th row.
		WID_BT_TYPE_31                       = ::WID_BT_TYPE_31,                       ///< Tree 3st column 1st row.
		WID_BT_TYPE_32                       = ::WID_BT_TYPE_32,                       ///< Tree 3st column 2nd row.
		WID_BT_TYPE_33                       = ::WID_BT_TYPE_33,                       ///< Tree 3st column 3rd row.
		WID_BT_TYPE_34                       = ::WID_BT_TYPE_34,                       ///< Tree 3st column 4th row.
		WID_BT_TYPE_RANDOM                   = ::WID_BT_TYPE_RANDOM,                   ///< Button to build random type of tree.
		WID_BT_MANY_RANDOM                   = ::WID_BT_MANY_RANDOM,                   ///< Button to build many random trees.
	};

	/** Widgets of the #VehicleViewWindow class. */
	enum VehicleViewWidgets {
		WID_VV_CAPTION                       = ::WID_VV_CAPTION,                       ///< Caption of window.
		WID_VV_VIEWPORT                      = ::WID_VV_VIEWPORT,                      ///< Viewport widget.
		WID_VV_START_STOP                    = ::WID_VV_START_STOP,                    ///< Start or stop this vehicle, and show information about the current state.
		WID_VV_CENTER_MAIN_VIEW              = ::WID_VV_CENTER_MAIN_VIEW,              ///< Center the main view on this vehicle.
		WID_VV_GOTO_DEPOT                    = ::WID_VV_GOTO_DEPOT,                    ///< Order this vehicle to go to the depot.
		WID_VV_REFIT                         = ::WID_VV_REFIT,                         ///< Open the refit window.
		WID_VV_SHOW_ORDERS                   = ::WID_VV_SHOW_ORDERS,                   ///< Show the orders of this vehicle.
		WID_VV_SHOW_DETAILS                  = ::WID_VV_SHOW_DETAILS,                  ///< Show details of this vehicle.
		WID_VV_CLONE                         = ::WID_VV_CLONE,                         ///< Clone this vehicle.
		WID_VV_SELECT_DEPOT_CLONE            = ::WID_VV_SELECT_DEPOT_CLONE,            ///< Selection widget between 'goto depot', and 'clone vehicle' buttons.
		WID_VV_SELECT_REFIT_TURN             = ::WID_VV_SELECT_REFIT_TURN,             ///< Selection widget between 'refit' and 'turn around' buttons.
		WID_VV_TURN_AROUND                   = ::WID_VV_TURN_AROUND,                   ///< Turn this vehicle around.
		WID_VV_FORCE_PROCEED                 = ::WID_VV_FORCE_PROCEED,                 ///< Force this vehicle to pass a signal at danger.
	};

	/** Widgets of the #RefitWindow class. */
	enum VehicleRefitWidgets {
		WID_VR_CAPTION                       = ::WID_VR_CAPTION,                       ///< Caption of window.
		WID_VR_VEHICLE_PANEL_DISPLAY         = ::WID_VR_VEHICLE_PANEL_DISPLAY,         ///< Display with a representation of the vehicle to refit.
		WID_VR_SHOW_HSCROLLBAR               = ::WID_VR_SHOW_HSCROLLBAR,               ///< Selection widget for the horizontal scrollbar.
		WID_VR_HSCROLLBAR                    = ::WID_VR_HSCROLLBAR,                    ///< Horizontal scrollbar or the vehicle display.
		WID_VR_SELECT_HEADER                 = ::WID_VR_SELECT_HEADER,                 ///< Header with question about the cargo to carry.
		WID_VR_MATRIX                        = ::WID_VR_MATRIX,                        ///< Options to refit to.
		WID_VR_SCROLLBAR                     = ::WID_VR_SCROLLBAR,                     ///< Scrollbar for the refit options.
		WID_VR_INFO                          = ::WID_VR_INFO,                          ///< Information about the currently selected refit option.
		WID_VR_REFIT                         = ::WID_VR_REFIT,                         ///< Perform the refit.
	};

	/** Widgets of the #VehicleDetailsWindow class. */
	enum VehicleDetailsWidgets {
		WID_VD_CAPTION                       = ::WID_VD_CAPTION,                       ///< Caption of window.
		WID_VD_RENAME_VEHICLE                = ::WID_VD_RENAME_VEHICLE,                ///< Rename this vehicle.
		WID_VD_TOP_DETAILS                   = ::WID_VD_TOP_DETAILS,                   ///< Panel with generic details.
		WID_VD_INCREASE_SERVICING_INTERVAL   = ::WID_VD_INCREASE_SERVICING_INTERVAL,   ///< Increase the servicing interval.
		WID_VD_DECREASE_SERVICING_INTERVAL   = ::WID_VD_DECREASE_SERVICING_INTERVAL,   ///< Decrease the servicing interval.
		WID_VD_SERVICING_INTERVAL            = ::WID_VD_SERVICING_INTERVAL,            ///< Information about the servicing interval.
		WID_VD_MIDDLE_DETAILS                = ::WID_VD_MIDDLE_DETAILS,                ///< Details for non-trains.
		WID_VD_MATRIX                        = ::WID_VD_MATRIX,                        ///< List of details for trains.
		WID_VD_SCROLLBAR                     = ::WID_VD_SCROLLBAR,                     ///< Scrollbar for train details.
		WID_VD_DETAILS_CARGO_CARRIED         = ::WID_VD_DETAILS_CARGO_CARRIED,         ///< Show carried cargo per part of the train.
		WID_VD_DETAILS_TRAIN_VEHICLES        = ::WID_VD_DETAILS_TRAIN_VEHICLES,        ///< Show all parts of the train with their description.
		WID_VD_DETAILS_CAPACITY_OF_EACH      = ::WID_VD_DETAILS_CAPACITY_OF_EACH,      ///< Show the capacity of all train parts.
		WID_VD_DETAILS_TOTAL_CARGO           = ::WID_VD_DETAILS_TOTAL_CARGO,           ///< Show the capacity and carried cargo amounts aggregrated per cargo of the train.
	};

	/** Widgets of the #VehicleListWindow class. */
	enum VehicleListWidgets {
		WID_VL_CAPTION                       = ::WID_VL_CAPTION,                       ///< Caption of window.
		WID_VL_SORT_ORDER                    = ::WID_VL_SORT_ORDER,                    ///< Sort order.
		WID_VL_SORT_BY_PULLDOWN              = ::WID_VL_SORT_BY_PULLDOWN,              ///< Sort by dropdown list.
		WID_VL_LIST                          = ::WID_VL_LIST,                          ///< List of the vehicles.
		WID_VL_SCROLLBAR                     = ::WID_VL_SCROLLBAR,                     ///< Scrollbar for the list.
		WID_VL_HIDE_BUTTONS                  = ::WID_VL_HIDE_BUTTONS,                  ///< Selection to hide the buttons.
		WID_VL_AVAILABLE_VEHICLES            = ::WID_VL_AVAILABLE_VEHICLES,            ///< Available vehicles.
		WID_VL_MANAGE_VEHICLES_DROPDOWN      = ::WID_VL_MANAGE_VEHICLES_DROPDOWN,      ///< Manage vehicles dropdown list.
		WID_VL_STOP_ALL                      = ::WID_VL_STOP_ALL,                      ///< Stop all button.
		WID_VL_START_ALL                     = ::WID_VL_START_ALL,                     ///< Start all button.
	};

	/** Widgets of the #ExtraViewportWindow class. */
	enum ExtraViewportWidgets {
		WID_EV_CAPTION                       = ::WID_EV_CAPTION,                       ///< Caption of window.
		WID_EV_VIEWPORT                      = ::WID_EV_VIEWPORT,                      ///< The viewport.
		WID_EV_ZOOM_IN                       = ::WID_EV_ZOOM_IN,                       ///< Zoom in.
		WID_EV_ZOOM_OUT                      = ::WID_EV_ZOOM_OUT,                      ///< Zoom out.
		WID_EV_MAIN_TO_VIEW                  = ::WID_EV_MAIN_TO_VIEW,                  ///< Center the view of this viewport on the main view.
		WID_EV_VIEW_TO_MAIN                  = ::WID_EV_VIEW_TO_MAIN,                  ///< Center the main view on the view of this viewport.
	};

	/** Widgets of the #WaypointWindow class. */
	enum WaypointWidgets {
		WID_W_CAPTION                        = ::WID_W_CAPTION,                        ///< Caption of window.
		WID_W_VIEWPORT                       = ::WID_W_VIEWPORT,                       ///< The viewport on this waypoint.
		WID_W_CENTER_VIEW                    = ::WID_W_CENTER_VIEW,                    ///< Center the main view on this waypoint.
		WID_W_RENAME                         = ::WID_W_RENAME,                         ///< Rename this waypoint.
		WID_W_SHOW_VEHICLES                  = ::WID_W_SHOW_VEHICLES,                  ///< Show the vehicles visiting this waypoint.
	};
};

#endif /* SCRIPT_WINDOW_HPP */