src/rail_gui.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file rail_gui.cpp %File for dealing with rail construction user interface */
  11
  12 #include "stdafx.h"
  13 #include "gui.h"
  14 #include "window_gui.h"
  15 #include "station_gui.h"
  16 #include "terraform_gui.h"
  17 #include "viewport_func.h"
  18 #include "command_func.h"
  19 #include "waypoint_func.h"
  20 #include "newgrf_station.h"
  21 #include "company_base.h"
  22 #include "strings_func.h"
  23 #include "window_func.h"
  24 #include "date_func.h"
  25 #include "sound_func.h"
  26 #include "company_func.h"
  27 #include "widgets/dropdown_type.h"
  28 #include "tunnelbridge.h"
  29 #include "tilehighlight_func.h"
  30 #include "spritecache.h"
  31 #include "core/geometry_func.hpp"
  32 #include "hotkeys.h"
  33 #include "engine_base.h"
  34 #include "vehicle_func.h"
  35 #include "zoom_func.h"
  36 #include "rail_gui.h"
  37
  38 #include "station_map.h"
  39 #include "tunnelbridge_map.h"
  40
  41 #include "widgets/rail_widget.h"
  42
  43 #include "safeguards.h"
  44
  45
  46 static RailType _cur_railtype;               ///< Rail type of the current build-rail toolbar.
  47 static bool _remove_button_clicked;          ///< Flag whether 'remove' toggle-button is currently enabled
  48 static DiagDirection _build_depot_direction; ///< Currently selected depot direction
  49 static byte _waypoint_count = 1;             ///< Number of waypoint types
  50 static byte _cur_waypoint_type;              ///< Currently selected waypoint type
  51 static bool _convert_signal_button;          ///< convert signal button in the signal GUI pressed
  52 static SignalVariant _cur_signal_variant;    ///< set the signal variant (for signal GUI)
  53 static SignalType _cur_signal_type;          ///< set the signal type (for signal GUI)
  54
  55 /* Map the setting: default_signal_type to the corresponding signal type */
  56 static const SignalType _default_signal_type[] = {SIGTYPE_NORMAL, SIGTYPE_PBS, SIGTYPE_PBS_ONEWAY};
  57
  58 struct RailStationGUISettings {
  59         Axis orientation;                 ///< Currently selected rail station orientation
  60
  61         bool newstations;                 ///< Are custom station definitions available?
  62         StationClassID station_class;     ///< Currently selected custom station class (if newstations is \c true )
  63         byte station_type;                ///< %Station type within the currently selected custom station class (if newstations is \c true )
  64         byte station_count;               ///< Number of custom stations (if newstations is \c true )
  65 };
  66 static RailStationGUISettings _railstation; ///< Settings of the station builder GUI
  67
  68
  69 static void HandleStationPlacement(TileIndex start, TileIndex end);
  70 static void ShowBuildTrainDepotPicker(Window *parent);
  71 static void ShowBuildWaypointPicker(Window *parent);
  72 static void ShowStationBuilder(Window *parent);
  73 static void ShowSignalBuilder(Window *parent);
  74
  75 /**
  76  * Check whether a station type can be build.
  77  * @return true if building is allowed.
  78  */
  79 static bool IsStationAvailable(const StationSpec *statspec)
  80 {
  81         if (statspec == nullptr || !HasBit(statspec->callback_mask, CBM_STATION_AVAIL)) return true;
  82
  83         uint16 cb_res = GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, nullptr, INVALID_TILE);
  84         if (cb_res == CALLBACK_FAILED) return true;
  85
  86         return Convert8bitBooleanCallback(statspec->grf_prop.grffile, CBID_STATION_AVAILABILITY, cb_res);
  87 }
  88
  89 void CcPlaySound_SPLAT_RAIL(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
  90 {
  91         if (result.Succeeded() && _settings_client.sound.confirm) SndPlayTileFx(SND_20_SPLAT_RAIL, tile);
  92 }
  93
  94 static void GenericPlaceRail(TileIndex tile, int cmd)
  95 {
  96         DoCommandP(tile, _cur_railtype, cmd,
  97                         _remove_button_clicked ?
  98                         CMD_REMOVE_SINGLE_RAIL | CMD_MSG(STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK) :
  99                         CMD_BUILD_SINGLE_RAIL | CMD_MSG(STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK),
 100                         CcPlaySound_SPLAT_RAIL);
 101 }
 102
 103 /**
 104  * Try to add an additional rail-track at the entrance of a depot
 105  * @param tile  Tile to use for adding the rail-track
 106  * @param dir   Direction to check for already present tracks
 107  * @param track Track to add
 108  * @see CcRailDepot()
 109  */
 110 static void PlaceExtraDepotRail(TileIndex tile, DiagDirection dir, Track track)
 111 {
 112         if (GetRailTileType(tile) != RAIL_TILE_NORMAL) return;
 113         if ((GetTrackBits(tile) & DiagdirReachesTracks(dir)) == 0) return;
 114
 115         DoCommandP(tile, _cur_railtype, track, CMD_BUILD_SINGLE_RAIL);
 116 }
 117
 118 /** Additional pieces of track to add at the entrance of a depot. */
 119 static const Track _place_depot_extra_track[12] = {
 120         TRACK_LEFT,  TRACK_UPPER, TRACK_UPPER, TRACK_RIGHT, // First additional track for directions 0..3
 121         TRACK_X,     TRACK_Y,     TRACK_X,     TRACK_Y,     // Second additional track
 122         TRACK_LOWER, TRACK_LEFT,  TRACK_RIGHT, TRACK_LOWER, // Third additional track
 123 };
 124
 125 /** Direction to check for existing track pieces. */
 126 static const DiagDirection _place_depot_extra_dir[12] = {
 127         DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE, DIAGDIR_SW,
 128         DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE, DIAGDIR_SE,
 129         DIAGDIR_NW, DIAGDIR_NE, DIAGDIR_NW, DIAGDIR_NE,
 130 };
 131
 132 void CcRailDepot(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
 133 {
 134         if (result.Failed()) return;
 135
 136         DiagDirection dir = (DiagDirection)p2;
 137
 138         if (_settings_client.sound.confirm) SndPlayTileFx(SND_20_SPLAT_RAIL, tile);
 139         if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
 140
 141         tile += TileOffsByDiagDir(dir);
 142
 143         if (IsTileType(tile, MP_RAILWAY)) {
 144                 PlaceExtraDepotRail(tile, _place_depot_extra_dir[dir], _place_depot_extra_track[dir]);
 145                 PlaceExtraDepotRail(tile, _place_depot_extra_dir[dir + 4], _place_depot_extra_track[dir + 4]);
 146                 PlaceExtraDepotRail(tile, _place_depot_extra_dir[dir + 8], _place_depot_extra_track[dir + 8]);
 147         }
 148 }
 149
 150 /**
 151  * Place a rail waypoint.
 152  * @param tile Position to start dragging a waypoint.
 153  */
 154 static void PlaceRail_Waypoint(TileIndex tile)
 155 {
 156         if (_remove_button_clicked) {
 157                 VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_REMOVE_STATION);
 158                 return;
 159         }
 160
 161         Axis axis = GetAxisForNewWaypoint(tile);
 162         if (IsValidAxis(axis)) {
 163                 /* Valid tile for waypoints */
 164                 VpStartPlaceSizing(tile, axis == AXIS_X ? VPM_X_LIMITED : VPM_Y_LIMITED, DDSP_BUILD_STATION);
 165                 VpSetPlaceSizingLimit(_settings_game.station.station_spread);
 166         } else {
 167                 /* Tile where we can't build rail waypoints. This is always going to fail,
 168                  * but provides the user with a proper error message. */
 169                 DoCommandP(tile, 1 << 8 | 1 << 16, STAT_CLASS_WAYP | INVALID_STATION << 16, CMD_BUILD_RAIL_WAYPOINT | CMD_MSG(STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT));
 170         }
 171 }
 172
 173 void CcStation(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
 174 {
 175         if (result.Failed()) return;
 176
 177         if (_settings_client.sound.confirm) SndPlayTileFx(SND_20_SPLAT_RAIL, tile);
 178         /* Only close the station builder window if the default station and non persistent building is chosen. */
 179         if (_railstation.station_class == STAT_CLASS_DFLT && _railstation.station_type == 0 && !_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
 180 }
 181
 182 /**
 183  * Place a rail station.
 184  * @param tile Position to place or start dragging a station.
 185  */
 186 static void PlaceRail_Station(TileIndex tile)
 187 {
 188         if (_remove_button_clicked) {
 189                 VpStartPlaceSizing(tile, VPM_X_AND_Y_LIMITED, DDSP_REMOVE_STATION);
 190                 VpSetPlaceSizingLimit(-1);
 191         } else if (_settings_client.gui.station_dragdrop) {
 192                 VpStartPlaceSizing(tile, VPM_X_AND_Y_LIMITED, DDSP_BUILD_STATION);
 193                 VpSetPlaceSizingLimit(_settings_game.station.station_spread);
 194         } else {
 195                 uint32 p1 = _cur_railtype | _railstation.orientation << 6 | _settings_client.gui.station_numtracks << 8 | _settings_client.gui.station_platlength << 16 | _ctrl_pressed << 24;
 196                 uint32 p2 = _railstation.station_class | _railstation.station_type << 8 | INVALID_STATION << 16;
 197
 198                 int w = _settings_client.gui.station_numtracks;
 199                 int h = _settings_client.gui.station_platlength;
 200                 if (!_railstation.orientation) Swap(w, h);
 201
 202                 CommandContainer cmdcont = { tile, p1, p2, CMD_BUILD_RAIL_STATION | CMD_MSG(STR_ERROR_CAN_T_BUILD_RAILROAD_STATION), CcStation, "" };
 203                 ShowSelectStationIfNeeded(cmdcont, TileArea(tile, w, h));
 204         }
 205 }
 206
 207 /**
 208  * Build a new signal or edit/remove a present signal, use CmdBuildSingleSignal() or CmdRemoveSingleSignal() in rail_cmd.cpp
 209  *
 210  * @param tile The tile where the signal will build or edit
 211  */
 212 static void GenericPlaceSignals(TileIndex tile)
 213 {
 214         TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0));
 215
 216         if (trackbits & TRACK_BIT_VERT) { // N-S direction
 217                 trackbits = (_tile_fract_coords.x <= _tile_fract_coords.y) ? TRACK_BIT_RIGHT : TRACK_BIT_LEFT;
 218         }
 219
 220         if (trackbits & TRACK_BIT_HORZ) { // E-W direction
 221                 trackbits = (_tile_fract_coords.x + _tile_fract_coords.y <= 15) ? TRACK_BIT_UPPER : TRACK_BIT_LOWER;
 222         }
 223
 224         Track track = FindFirstTrack(trackbits);
 225
 226         if (_remove_button_clicked) {
 227                 DoCommandP(tile, track, 0, CMD_REMOVE_SIGNALS | CMD_MSG(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM), CcPlaySound_SPLAT_RAIL);
 228         } else {
 229                 const Window *w = FindWindowById(WC_BUILD_SIGNAL, 0);
 230
 231                 /* Map the setting cycle_signal_types to the lower and upper allowed signal type. */
 232                 static const uint cycle_bounds[] = {SIGTYPE_NORMAL | (SIGTYPE_LAST_NOPBS << 3), SIGTYPE_PBS | (SIGTYPE_LAST << 3), SIGTYPE_NORMAL | (SIGTYPE_LAST << 3)};
 233
 234                 /* various bitstuffed elements for CmdBuildSingleSignal() */
 235                 uint32 p1 = track;
 236
 237                 if (w != nullptr) {
 238                         /* signal GUI is used */
 239                         SB(p1, 3, 1, _ctrl_pressed);
 240                         SB(p1, 4, 1, _cur_signal_variant);
 241                         SB(p1, 5, 3, _cur_signal_type);
 242                         SB(p1, 8, 1, _convert_signal_button);
 243                         SB(p1, 9, 6, cycle_bounds[_settings_client.gui.cycle_signal_types]);
 244                 } else {
 245                         SB(p1, 3, 1, _ctrl_pressed);
 246                         SB(p1, 4, 1, (_cur_year < _settings_client.gui.semaphore_build_before ? SIG_SEMAPHORE : SIG_ELECTRIC));
 247                         SB(p1, 5, 3, _default_signal_type[_settings_client.gui.default_signal_type]);
 248                         SB(p1, 8, 1, 0);
 249                         SB(p1, 9, 6, cycle_bounds[_settings_client.gui.cycle_signal_types]);
 250                 }
 251
 252                 DoCommandP(tile, p1, 0, CMD_BUILD_SIGNALS |
 253                                 CMD_MSG((w != nullptr && _convert_signal_button) ? STR_ERROR_SIGNAL_CAN_T_CONVERT_SIGNALS_HERE : STR_ERROR_CAN_T_BUILD_SIGNALS_HERE),
 254                                 CcPlaySound_SPLAT_RAIL);
 255         }
 256 }
 257
 258 /**
 259  * Start placing a rail bridge.
 260  * @param tile Position of the first tile of the bridge.
 261  * @param w    Rail toolbar window.
 262  */
 263 static void PlaceRail_Bridge(TileIndex tile, Window *w)
 264 {
 265         if (IsBridgeTile(tile)) {
 266                 TileIndex other_tile = GetOtherTunnelBridgeEnd(tile);
 267                 Point pt = {0, 0};
 268                 w->OnPlaceMouseUp(VPM_X_OR_Y, DDSP_BUILD_BRIDGE, pt, other_tile, tile);
 269         } else {
 270                 VpStartPlaceSizing(tile, VPM_X_OR_Y, DDSP_BUILD_BRIDGE);
 271         }
 272 }
 273
 274 /** Command callback for building a tunnel */
 275 void CcBuildRailTunnel(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
 276 {
 277         if (result.Succeeded()) {
 278                 if (_settings_client.sound.confirm) SndPlayTileFx(SND_20_SPLAT_RAIL, tile);
 279                 if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
 280         } else {
 281                 SetRedErrorSquare(_build_tunnel_endtile);
 282         }
 283 }
 284
 285 /**
 286  * Toggles state of the Remove button of Build rail toolbar
 287  * @param w window the button belongs to
 288  */
 289 static void ToggleRailButton_Remove(Window *w)
 290 {
 291         DeleteWindowById(WC_SELECT_STATION, 0);
 292         w->ToggleWidgetLoweredState(WID_RAT_REMOVE);
 293         w->SetWidgetDirty(WID_RAT_REMOVE);
 294         _remove_button_clicked = w->IsWidgetLowered(WID_RAT_REMOVE);
 295         SetSelectionRed(_remove_button_clicked);
 296 }
 297
 298 /**
 299  * Updates the Remove button because of Ctrl state change
 300  * @param w window the button belongs to
 301  * @return true iff the remove button was changed
 302  */
 303 static bool RailToolbar_CtrlChanged(Window *w)
 304 {
 305         if (w->IsWidgetDisabled(WID_RAT_REMOVE)) return false;
 306
 307         /* allow ctrl to switch remove mode only for these widgets */
 308         for (uint i = WID_RAT_BUILD_NS; i <= WID_RAT_BUILD_STATION; i++) {
 309                 if ((i <= WID_RAT_AUTORAIL || i >= WID_RAT_BUILD_WAYPOINT) && w->IsWidgetLowered(i)) {
 310                         ToggleRailButton_Remove(w);
 311                         return true;
 312                 }
 313         }
 314
 315         return false;
 316 }
 317
 318
 319 /**
 320  * The "remove"-button click proc of the build-rail toolbar.
 321  * @param w Build-rail toolbar window
 322  * @see BuildRailToolbarWindow::OnClick()
 323  */
 324 static void BuildRailClick_Remove(Window *w)
 325 {
 326         if (w->IsWidgetDisabled(WID_RAT_REMOVE)) return;
 327         ToggleRailButton_Remove(w);
 328         if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
 329
 330         /* handle station builder */
 331         if (w->IsWidgetLowered(WID_RAT_BUILD_STATION)) {
 332                 if (_remove_button_clicked) {
 333                         /* starting drag & drop remove */
 334                         if (!_settings_client.gui.station_dragdrop) {
 335                                 SetTileSelectSize(1, 1);
 336                         } else {
 337                                 VpSetPlaceSizingLimit(-1);
 338                         }
 339                 } else {
 340                         /* starting station build mode */
 341                         if (!_settings_client.gui.station_dragdrop) {
 342                                 int x = _settings_client.gui.station_numtracks;
 343                                 int y = _settings_client.gui.station_platlength;
 344                                 if (_railstation.orientation == 0) Swap(x, y);
 345                                 SetTileSelectSize(x, y);
 346                         } else {
 347                                 VpSetPlaceSizingLimit(_settings_game.station.station_spread);
 348                         }
 349                 }
 350         }
 351 }
 352
 353 static void DoRailroadTrack(int mode)
 354 {
 355         DoCommandP(TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), _cur_railtype | (mode << 6),
 356                         _remove_button_clicked ?
 357                         CMD_REMOVE_RAILROAD_TRACK | CMD_MSG(STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK) :
 358                         CMD_BUILD_RAILROAD_TRACK  | CMD_MSG(STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK),
 359                         CcPlaySound_SPLAT_RAIL);
 360 }
 361
 362 static void HandleAutodirPlacement()
 363 {
 364         int trackstat = _thd.drawstyle & HT_DIR_MASK; // 0..5
 365
 366         if (_thd.drawstyle & HT_RAIL) { // one tile case
 367                 GenericPlaceRail(TileVirtXY(_thd.selend.x, _thd.selend.y), trackstat);
 368                 return;
 369         }
 370
 371         DoRailroadTrack(trackstat);
 372 }
 373
 374 /**
 375  * Build new signals or remove signals or (if only one tile marked) edit a signal.
 376  *
 377  * If one tile marked abort and use GenericPlaceSignals()
 378  * else use CmdBuildSingleSignal() or CmdRemoveSingleSignal() in rail_cmd.cpp to build many signals
 379  */
 380 static void HandleAutoSignalPlacement()
 381 {
 382         uint32 p2 = GB(_thd.drawstyle, 0, 3); // 0..5
 383
 384         if ((_thd.drawstyle & HT_DRAG_MASK) == HT_RECT) { // one tile case
 385                 GenericPlaceSignals(TileVirtXY(_thd.selend.x, _thd.selend.y));
 386                 return;
 387         }
 388
 389         const Window *w = FindWindowById(WC_BUILD_SIGNAL, 0);
 390
 391         if (w != nullptr) {
 392                 /* signal GUI is used */
 393                 SB(p2,  3, 1, 0);
 394                 SB(p2,  4, 1, _cur_signal_variant);
 395                 SB(p2,  6, 1, _ctrl_pressed);
 396                 SB(p2,  7, 3, _cur_signal_type);
 397                 SB(p2, 24, 8, _settings_client.gui.drag_signals_density);
 398                 SB(p2, 10, 1, !_settings_client.gui.drag_signals_fixed_distance);
 399         } else {
 400                 SB(p2,  3, 1, 0);
 401                 SB(p2,  4, 1, (_cur_year < _settings_client.gui.semaphore_build_before ? SIG_SEMAPHORE : SIG_ELECTRIC));
 402                 SB(p2,  6, 1, _ctrl_pressed);
 403                 SB(p2,  7, 3, _default_signal_type[_settings_client.gui.default_signal_type]);
 404                 SB(p2, 24, 8, _settings_client.gui.drag_signals_density);
 405                 SB(p2, 10, 1, !_settings_client.gui.drag_signals_fixed_distance);
 406         }
 407
 408         /* _settings_client.gui.drag_signals_density is given as a parameter such that each user
 409          * in a network game can specify his/her own signal density */
 410         DoCommandP(TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2,
 411                         _remove_button_clicked ?
 412                         CMD_REMOVE_SIGNAL_TRACK | CMD_MSG(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM) :
 413                         CMD_BUILD_SIGNAL_TRACK  | CMD_MSG(STR_ERROR_CAN_T_BUILD_SIGNALS_HERE),
 414                         CcPlaySound_SPLAT_RAIL);
 415 }
 416
 417
 418 /** Rail toolbar management class. */
 419 struct BuildRailToolbarWindow : Window {
 420         RailType railtype;    ///< Rail type to build.
 421         int last_user_action; ///< Last started user action.
 422
 423         BuildRailToolbarWindow(WindowDesc *desc, RailType railtype) : Window(desc)
 424         {
 425                 this->InitNested(TRANSPORT_RAIL);
 426                 this->SetupRailToolbar(railtype);
 427                 this->DisableWidget(WID_RAT_REMOVE);
 428                 this->last_user_action = WIDGET_LIST_END;
 429
 430                 if (_settings_client.gui.link_terraform_toolbar) ShowTerraformToolbar(this);
 431         }
 432
 433         ~BuildRailToolbarWindow()
 434         {
 435                 if (_settings_client.gui.link_terraform_toolbar) DeleteWindowById(WC_SCEN_LAND_GEN, 0, false);
 436         }
 437
 438         /**
 439          * Some data on this window has become invalid.
 440          * @param data Information about the changed data.
 441          * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 442          */
 443         void OnInvalidateData(int data = 0, bool gui_scope = true) override
 444         {
 445                 if (!gui_scope) return;
 446
 447                 if (!CanBuildVehicleInfrastructure(VEH_TRAIN)) delete this;
 448         }
 449
 450         /**
 451          * Configures the rail toolbar for railtype given
 452          * @param railtype the railtype to display
 453          */
 454         void SetupRailToolbar(RailType railtype)
 455         {
 456                 this->railtype = railtype;
 457                 const RailtypeInfo *rti = GetRailTypeInfo(railtype);
 458
 459                 assert(railtype < RAILTYPE_END);
 460                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_NS)->widget_data     = rti->gui_sprites.build_ns_rail;
 461                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_X)->widget_data      = rti->gui_sprites.build_x_rail;
 462                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_EW)->widget_data     = rti->gui_sprites.build_ew_rail;
 463                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_Y)->widget_data      = rti->gui_sprites.build_y_rail;
 464                 this->GetWidget<NWidgetCore>(WID_RAT_AUTORAIL)->widget_data     = rti->gui_sprites.auto_rail;
 465                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_DEPOT)->widget_data  = rti->gui_sprites.build_depot;
 466                 this->GetWidget<NWidgetCore>(WID_RAT_CONVERT_RAIL)->widget_data = rti->gui_sprites.convert_rail;
 467                 this->GetWidget<NWidgetCore>(WID_RAT_BUILD_TUNNEL)->widget_data = rti->gui_sprites.build_tunnel;
 468         }
 469
 470         /**
 471          * Switch to another rail type.
 472          * @param railtype New rail type.
 473          */
 474         void ModifyRailType(RailType railtype)
 475         {
 476                 this->SetupRailToolbar(railtype);
 477                 this->ReInit();
 478         }
 479
 480         void UpdateRemoveWidgetStatus(int clicked_widget)
 481         {
 482                 switch (clicked_widget) {
 483                         case WID_RAT_REMOVE:
 484                                 /* If it is the removal button that has been clicked, do nothing,
 485                                  * as it is up to the other buttons to drive removal status */
 486                                 return;
 487
 488                         case WID_RAT_BUILD_NS:
 489                         case WID_RAT_BUILD_X:
 490                         case WID_RAT_BUILD_EW:
 491                         case WID_RAT_BUILD_Y:
 492                         case WID_RAT_AUTORAIL:
 493                         case WID_RAT_BUILD_WAYPOINT:
 494                         case WID_RAT_BUILD_STATION:
 495                         case WID_RAT_BUILD_SIGNALS:
 496                                 /* Removal button is enabled only if the rail/signal/waypoint/station
 497                                  * button is still lowered.  Once raised, it has to be disabled */
 498                                 this->SetWidgetDisabledState(WID_RAT_REMOVE, !this->IsWidgetLowered(clicked_widget));
 499                                 break;
 500
 501                         default:
 502                                 /* When any other buttons than rail/signal/waypoint/station, raise and
 503                                  * disable the removal button */
 504                                 this->DisableWidget(WID_RAT_REMOVE);
 505                                 this->RaiseWidget(WID_RAT_REMOVE);
 506                                 break;
 507                 }
 508         }
 509
 510         void SetStringParameters(int widget) const override
 511         {
 512                 if (widget == WID_RAT_CAPTION) {
 513                         const RailtypeInfo *rti = GetRailTypeInfo(this->railtype);
 514                         if (rti->max_speed > 0) {
 515                                 SetDParam(0, STR_TOOLBAR_RAILTYPE_VELOCITY);
 516                                 SetDParam(1, rti->strings.toolbar_caption);
 517                                 SetDParam(2, rti->max_speed);
 518                         } else {
 519                                 SetDParam(0, rti->strings.toolbar_caption);
 520                         }
 521                 }
 522         }
 523
 524         void OnClick(Point pt, int widget, int click_count) override
 525         {
 526                 if (widget < WID_RAT_BUILD_NS) return;
 527
 528                 _remove_button_clicked = false;
 529                 switch (widget) {
 530                         case WID_RAT_BUILD_NS:
 531                                 HandlePlacePushButton(this, WID_RAT_BUILD_NS, GetRailTypeInfo(_cur_railtype)->cursor.rail_ns, HT_LINE | HT_DIR_VL);
 532                                 this->last_user_action = widget;
 533                                 break;
 534
 535                         case WID_RAT_BUILD_X:
 536                                 HandlePlacePushButton(this, WID_RAT_BUILD_X, GetRailTypeInfo(_cur_railtype)->cursor.rail_swne, HT_LINE | HT_DIR_X);
 537                                 this->last_user_action = widget;
 538                                 break;
 539
 540                         case WID_RAT_BUILD_EW:
 541                                 HandlePlacePushButton(this, WID_RAT_BUILD_EW, GetRailTypeInfo(_cur_railtype)->cursor.rail_ew, HT_LINE | HT_DIR_HL);
 542                                 this->last_user_action = widget;
 543                                 break;
 544
 545                         case WID_RAT_BUILD_Y:
 546                                 HandlePlacePushButton(this, WID_RAT_BUILD_Y, GetRailTypeInfo(_cur_railtype)->cursor.rail_nwse, HT_LINE | HT_DIR_Y);
 547                                 this->last_user_action = widget;
 548                                 break;
 549
 550                         case WID_RAT_AUTORAIL:
 551                                 HandlePlacePushButton(this, WID_RAT_AUTORAIL, GetRailTypeInfo(_cur_railtype)->cursor.autorail, HT_RAIL);
 552                                 this->last_user_action = widget;
 553                                 break;
 554
 555                         case WID_RAT_DEMOLISH:
 556                                 HandlePlacePushButton(this, WID_RAT_DEMOLISH, ANIMCURSOR_DEMOLISH, HT_RECT | HT_DIAGONAL);
 557                                 this->last_user_action = widget;
 558                                 break;
 559
 560                         case WID_RAT_BUILD_DEPOT:
 561                                 if (HandlePlacePushButton(this, WID_RAT_BUILD_DEPOT, GetRailTypeInfo(_cur_railtype)->cursor.depot, HT_RECT)) {
 562                                         ShowBuildTrainDepotPicker(this);
 563                                         this->last_user_action = widget;
 564                                 }
 565                                 break;
 566
 567                         case WID_RAT_BUILD_WAYPOINT:
 568                                 this->last_user_action = widget;
 569                                 _waypoint_count = StationClass::Get(STAT_CLASS_WAYP)->GetSpecCount();
 570                                 if (HandlePlacePushButton(this, WID_RAT_BUILD_WAYPOINT, SPR_CURSOR_WAYPOINT, HT_RECT) && _waypoint_count > 1) {
 571                                         ShowBuildWaypointPicker(this);
 572                                 }
 573                                 break;
 574
 575                         case WID_RAT_BUILD_STATION:
 576                                 if (HandlePlacePushButton(this, WID_RAT_BUILD_STATION, SPR_CURSOR_RAIL_STATION, HT_RECT)) {
 577                                         ShowStationBuilder(this);
 578                                         this->last_user_action = widget;
 579                                 }
 580                                 break;
 581
 582                         case WID_RAT_BUILD_SIGNALS: {
 583                                 this->last_user_action = widget;
 584                                 bool started = HandlePlacePushButton(this, WID_RAT_BUILD_SIGNALS, ANIMCURSOR_BUILDSIGNALS, HT_RECT);
 585                                 if (started && _settings_client.gui.enable_signal_gui != _ctrl_pressed) {
 586                                         ShowSignalBuilder(this);
 587                                 }
 588                                 break;
 589                         }
 590
 591                         case WID_RAT_BUILD_BRIDGE:
 592                                 HandlePlacePushButton(this, WID_RAT_BUILD_BRIDGE, SPR_CURSOR_BRIDGE, HT_RECT);
 593                                 this->last_user_action = widget;
 594                                 break;
 595
 596                         case WID_RAT_BUILD_TUNNEL:
 597                                 HandlePlacePushButton(this, WID_RAT_BUILD_TUNNEL, GetRailTypeInfo(_cur_railtype)->cursor.tunnel, HT_SPECIAL);
 598                                 this->last_user_action = widget;
 599                                 break;
 600
 601                         case WID_RAT_REMOVE:
 602                                 BuildRailClick_Remove(this);
 603                                 break;
 604
 605                         case WID_RAT_CONVERT_RAIL:
 606                                 HandlePlacePushButton(this, WID_RAT_CONVERT_RAIL, GetRailTypeInfo(_cur_railtype)->cursor.convert, HT_RECT | HT_DIAGONAL);
 607                                 this->last_user_action = widget;
 608                                 break;
 609
 610                         default: NOT_REACHED();
 611                 }
 612                 this->UpdateRemoveWidgetStatus(widget);
 613                 if (_ctrl_pressed) RailToolbar_CtrlChanged(this);
 614         }
 615
 616         EventState OnHotkey(int hotkey) override
 617         {
 618                 MarkTileDirtyByTile(TileVirtXY(_thd.pos.x, _thd.pos.y)); // redraw tile selection
 619                 return Window::OnHotkey(hotkey);
 620         }
 621
 622         void OnPlaceObject(Point pt, TileIndex tile) override
 623         {
 624                 switch (this->last_user_action) {
 625                         case WID_RAT_BUILD_NS:
 626                                 VpStartPlaceSizing(tile, VPM_FIX_VERTICAL | VPM_RAILDIRS, DDSP_PLACE_RAIL);
 627                                 break;
 628
 629                         case WID_RAT_BUILD_X:
 630                                 VpStartPlaceSizing(tile, VPM_FIX_Y | VPM_RAILDIRS, DDSP_PLACE_RAIL);
 631                                 break;
 632
 633                         case WID_RAT_BUILD_EW:
 634                                 VpStartPlaceSizing(tile, VPM_FIX_HORIZONTAL | VPM_RAILDIRS, DDSP_PLACE_RAIL);
 635                                 break;
 636
 637                         case WID_RAT_BUILD_Y:
 638                                 VpStartPlaceSizing(tile, VPM_FIX_X | VPM_RAILDIRS, DDSP_PLACE_RAIL);
 639                                 break;
 640
 641                         case WID_RAT_AUTORAIL:
 642                                 VpStartPlaceSizing(tile, VPM_RAILDIRS, DDSP_PLACE_RAIL);
 643                                 break;
 644
 645                         case WID_RAT_DEMOLISH:
 646                                 PlaceProc_DemolishArea(tile);
 647                                 break;
 648
 649                         case WID_RAT_BUILD_DEPOT:
 650                                 DoCommandP(tile, _cur_railtype, _build_depot_direction,
 651                                                 CMD_BUILD_TRAIN_DEPOT | CMD_MSG(STR_ERROR_CAN_T_BUILD_TRAIN_DEPOT),
 652                                                 CcRailDepot);
 653                                 break;
 654
 655                         case WID_RAT_BUILD_WAYPOINT:
 656                                 PlaceRail_Waypoint(tile);
 657                                 break;
 658
 659                         case WID_RAT_BUILD_STATION:
 660                                 PlaceRail_Station(tile);
 661                                 break;
 662
 663                         case WID_RAT_BUILD_SIGNALS:
 664                                 VpStartPlaceSizing(tile, VPM_SIGNALDIRS, DDSP_BUILD_SIGNALS);
 665                                 break;
 666
 667                         case WID_RAT_BUILD_BRIDGE:
 668                                 PlaceRail_Bridge(tile, this);
 669                                 break;
 670
 671                         case WID_RAT_BUILD_TUNNEL:
 672                                 DoCommandP(tile, _cur_railtype | (TRANSPORT_RAIL << 8), 0, CMD_BUILD_TUNNEL | CMD_MSG(STR_ERROR_CAN_T_BUILD_TUNNEL_HERE), CcBuildRailTunnel);
 673                                 break;
 674
 675                         case WID_RAT_CONVERT_RAIL:
 676                                 VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_CONVERT_RAIL);
 677                                 break;
 678
 679                         default: NOT_REACHED();
 680                 }
 681         }
 682
 683         void OnPlaceDrag(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt) override
 684         {
 685                 /* no dragging if you have pressed the convert button */
 686                 if (FindWindowById(WC_BUILD_SIGNAL, 0) != nullptr && _convert_signal_button && this->IsWidgetLowered(WID_RAT_BUILD_SIGNALS)) return;
 687
 688                 VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 689         }
 690
 691         void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile) override
 692         {
 693                 if (pt.x != -1) {
 694                         switch (select_proc) {
 695                                 default: NOT_REACHED();
 696                                 case DDSP_BUILD_BRIDGE:
 697                                         if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
 698                                         ShowBuildBridgeWindow(start_tile, end_tile, TRANSPORT_RAIL, _cur_railtype);
 699                                         break;
 700
 701                                 case DDSP_PLACE_RAIL:
 702                                         HandleAutodirPlacement();
 703                                         break;
 704
 705                                 case DDSP_BUILD_SIGNALS:
 706                                         HandleAutoSignalPlacement();
 707                                         break;
 708
 709                                 case DDSP_DEMOLISH_AREA:
 710                                         GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
 711                                         break;
 712
 713                                 case DDSP_CONVERT_RAIL:
 714                                         DoCommandP(end_tile, start_tile, _cur_railtype | (_ctrl_pressed ? 1 << 6 : 0), CMD_CONVERT_RAIL | CMD_MSG(STR_ERROR_CAN_T_CONVERT_RAIL), CcPlaySound_SPLAT_RAIL);
 715                                         break;
 716
 717                                 case DDSP_REMOVE_STATION:
 718                                 case DDSP_BUILD_STATION:
 719                                         if (this->IsWidgetLowered(WID_RAT_BUILD_STATION)) {
 720                                                 /* Station */
 721                                                 if (_remove_button_clicked) {
 722                                                         DoCommandP(end_tile, start_tile, _ctrl_pressed ? 0 : 1, CMD_REMOVE_FROM_RAIL_STATION | CMD_MSG(STR_ERROR_CAN_T_REMOVE_PART_OF_STATION), CcPlaySound_SPLAT_RAIL);
 723                                                 } else {
 724                                                         HandleStationPlacement(start_tile, end_tile);
 725                                                 }
 726                                         } else {
 727                                                 /* Waypoint */
 728                                                 if (_remove_button_clicked) {
 729                                                         DoCommandP(end_tile, start_tile, _ctrl_pressed ? 0 : 1, CMD_REMOVE_FROM_RAIL_WAYPOINT | CMD_MSG(STR_ERROR_CAN_T_REMOVE_TRAIN_WAYPOINT), CcPlaySound_SPLAT_RAIL);
 730                                                 } else {
 731                                                         TileArea ta(start_tile, end_tile);
 732                                                         uint32 p1 = _cur_railtype | (select_method == VPM_X_LIMITED ? AXIS_X : AXIS_Y) << 6 | ta.w << 8 | ta.h << 16 | _ctrl_pressed << 24;
 733                                                         uint32 p2 = STAT_CLASS_WAYP | _cur_waypoint_type << 8 | INVALID_STATION << 16;
 734
 735                                                         CommandContainer cmdcont = { ta.tile, p1, p2, CMD_BUILD_RAIL_WAYPOINT | CMD_MSG(STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT), CcPlaySound_SPLAT_RAIL, "" };
 736                                                         ShowSelectWaypointIfNeeded(cmdcont, ta);
 737                                                 }
 738                                         }
 739                                         break;
 740                         }
 741                 }
 742         }
 743
 744         void OnPlaceObjectAbort() override
 745         {
 746                 this->RaiseButtons();
 747                 this->DisableWidget(WID_RAT_REMOVE);
 748                 this->SetWidgetDirty(WID_RAT_REMOVE);
 749
 750                 DeleteWindowById(WC_BUILD_SIGNAL, TRANSPORT_RAIL);
 751                 DeleteWindowById(WC_BUILD_STATION, TRANSPORT_RAIL);
 752                 DeleteWindowById(WC_BUILD_DEPOT, TRANSPORT_RAIL);
 753                 DeleteWindowById(WC_BUILD_WAYPOINT, TRANSPORT_RAIL);
 754                 DeleteWindowById(WC_SELECT_STATION, 0);
 755                 DeleteWindowByClass(WC_BUILD_BRIDGE);
 756         }
 757
 758         void OnPlacePresize(Point pt, TileIndex tile) override
 759         {
 760                 DoCommand(tile, _cur_railtype | (TRANSPORT_RAIL << 8), 0, DC_AUTO, CMD_BUILD_TUNNEL);
 761                 VpSetPresizeRange(tile, _build_tunnel_endtile == 0 ? tile : _build_tunnel_endtile);
 762         }
 763
 764         EventState OnCTRLStateChange() override
 765         {
 766                 /* do not toggle Remove button by Ctrl when placing station */
 767                 if (!this->IsWidgetLowered(WID_RAT_BUILD_STATION) && !this->IsWidgetLowered(WID_RAT_BUILD_WAYPOINT) && RailToolbar_CtrlChanged(this)) return ES_HANDLED;
 768                 return ES_NOT_HANDLED;
 769         }
 770
 771         static HotkeyList hotkeys;
 772 };
 773
 774 /**
 775  * Handler for global hotkeys of the BuildRailToolbarWindow.
 776  * @param hotkey Hotkey
 777  * @return ES_HANDLED if hotkey was accepted.
 778  */
 779 static EventState RailToolbarGlobalHotkeys(int hotkey)
 780 {
 781         if (_game_mode != GM_NORMAL || !CanBuildVehicleInfrastructure(VEH_TRAIN)) return ES_NOT_HANDLED;
 782         extern RailType _last_built_railtype;
 783         Window *w = ShowBuildRailToolbar(_last_built_railtype);
 784         if (w == nullptr) return ES_NOT_HANDLED;
 785         return w->OnHotkey(hotkey);
 786 }
 787
 788 const uint16 _railtoolbar_autorail_keys[] = {'5', 'A' | WKC_GLOBAL_HOTKEY, 0};
 789
 790 static Hotkey railtoolbar_hotkeys[] = {
 791         Hotkey('1', "build_ns", WID_RAT_BUILD_NS),
 792         Hotkey('2', "build_x", WID_RAT_BUILD_X),
 793         Hotkey('3', "build_ew", WID_RAT_BUILD_EW),
 794         Hotkey('4', "build_y", WID_RAT_BUILD_Y),
 795         Hotkey(_railtoolbar_autorail_keys, "autorail", WID_RAT_AUTORAIL),
 796         Hotkey('6', "demolish", WID_RAT_DEMOLISH),
 797         Hotkey('7', "depot", WID_RAT_BUILD_DEPOT),
 798         Hotkey('8', "waypoint", WID_RAT_BUILD_WAYPOINT),
 799         Hotkey('9', "station", WID_RAT_BUILD_STATION),
 800         Hotkey('S', "signal", WID_RAT_BUILD_SIGNALS),
 801         Hotkey('B', "bridge", WID_RAT_BUILD_BRIDGE),
 802         Hotkey('T', "tunnel", WID_RAT_BUILD_TUNNEL),
 803         Hotkey('R', "remove", WID_RAT_REMOVE),
 804         Hotkey('C', "convert", WID_RAT_CONVERT_RAIL),
 805         HOTKEY_LIST_END
 806 };
 807 HotkeyList BuildRailToolbarWindow::hotkeys("railtoolbar", railtoolbar_hotkeys, RailToolbarGlobalHotkeys);
 808
 809 static const NWidgetPart _nested_build_rail_widgets[] = {
 810         NWidget(NWID_HORIZONTAL),
 811                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 812                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, WID_RAT_CAPTION), SetDataTip(STR_WHITE_STRING, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 813                 NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
 814         EndContainer(),
 815         NWidget(NWID_HORIZONTAL),
 816                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_NS),
 817                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_RAIL_NS, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_TRACK),
 818                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_X),
 819                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_RAIL_NE, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_TRACK),
 820                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_EW),
 821                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_RAIL_EW, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_TRACK),
 822                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_Y),
 823                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_RAIL_NW, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_TRACK),
 824                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_AUTORAIL),
 825                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_AUTORAIL, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_AUTORAIL),
 826
 827                 NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetMinimalSize(4, 22), SetDataTip(0x0, STR_NULL), EndContainer(),
 828
 829                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_DEMOLISH),
 830                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
 831                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_DEPOT),
 832                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DEPOT_RAIL, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_TRAIN_DEPOT_FOR_BUILDING),
 833                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_WAYPOINT),
 834                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_WAYPOINT, STR_RAIL_TOOLBAR_TOOLTIP_CONVERT_RAIL_TO_WAYPOINT),
 835                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_STATION),
 836                                                 SetFill(0, 1), SetMinimalSize(42, 22), SetDataTip(SPR_IMG_RAIL_STATION, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_STATION),
 837                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_SIGNALS),
 838                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_RAIL_SIGNALS, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_SIGNALS),
 839                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_BRIDGE),
 840                                                 SetFill(0, 1), SetMinimalSize(42, 22), SetDataTip(SPR_IMG_BRIDGE, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_BRIDGE),
 841                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_BUILD_TUNNEL),
 842                                                 SetFill(0, 1), SetMinimalSize(20, 22), SetDataTip(SPR_IMG_TUNNEL_RAIL, STR_RAIL_TOOLBAR_TOOLTIP_BUILD_RAILROAD_TUNNEL),
 843                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_REMOVE),
 844                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_REMOVE, STR_RAIL_TOOLBAR_TOOLTIP_TOGGLE_BUILD_REMOVE_FOR),
 845                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_RAT_CONVERT_RAIL),
 846                                                 SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_CONVERT_RAIL, STR_RAIL_TOOLBAR_TOOLTIP_CONVERT_RAIL),
 847         EndContainer(),
 848 };
 849
 850 static WindowDesc _build_rail_desc(
 851         WDP_ALIGN_TOOLBAR, "toolbar_rail", 0, 0,
 852         WC_BUILD_TOOLBAR, WC_NONE,
 853         WDF_CONSTRUCTION,
 854         _nested_build_rail_widgets, lengthof(_nested_build_rail_widgets),
 855         &BuildRailToolbarWindow::hotkeys
 856 );
 857
 858
 859 /**
 860  * Open the build rail toolbar window for a specific rail type.
 861  *
 862  * If the terraform toolbar is linked to the toolbar, that window is also opened.
 863  *
 864  * @param railtype Rail type to open the window for
 865  * @return newly opened rail toolbar, or nullptr if the toolbar could not be opened.
 866  */
 867 Window *ShowBuildRailToolbar(RailType railtype)
 868 {
 869         if (!Company::IsValidID(_local_company)) return nullptr;
 870         if (!ValParamRailtype(railtype)) return nullptr;
 871
 872         DeleteWindowByClass(WC_BUILD_TOOLBAR);
 873         _cur_railtype = railtype;
 874         _remove_button_clicked = false;
 875         return new BuildRailToolbarWindow(&_build_rail_desc, railtype);
 876 }
 877
 878 /* TODO: For custom stations, respect their allowed platforms/lengths bitmasks!
 879  * --pasky */
 880
 881 static void HandleStationPlacement(TileIndex start, TileIndex end)
 882 {
 883         TileArea ta(start, end);
 884         uint numtracks = ta.w;
 885         uint platlength = ta.h;
 886
 887         if (_railstation.orientation == AXIS_X) Swap(numtracks, platlength);
 888
 889         uint32 p1 = _cur_railtype | _railstation.orientation << 6 | numtracks << 8 | platlength << 16 | _ctrl_pressed << 24;
 890         uint32 p2 = _railstation.station_class | _railstation.station_type << 8 | INVALID_STATION << 16;
 891
 892         CommandContainer cmdcont = { ta.tile, p1, p2, CMD_BUILD_RAIL_STATION | CMD_MSG(STR_ERROR_CAN_T_BUILD_RAILROAD_STATION), CcStation, "" };
 893         ShowSelectStationIfNeeded(cmdcont, ta);
 894 }
 895
 896 struct BuildRailStationWindow : public PickerWindowBase {
 897 private:
 898         uint line_height;     ///< Height of a single line in the newstation selection matrix (#WID_BRAS_NEWST_LIST widget).
 899         uint coverage_height; ///< Height of the coverage texts.
 900         Scrollbar *vscroll;   ///< Vertical scrollbar of the new station list.
 901         Scrollbar *vscroll2;  ///< Vertical scrollbar of the matrix with new stations.
 902
 903         /**
 904          * Verify whether the currently selected station size is allowed after selecting a new station class/type.
 905          * If not, change the station size variables ( _settings_client.gui.station_numtracks and _settings_client.gui.station_platlength ).
 906          * @param statspec Specification of the new station class/type
 907          */
 908         void CheckSelectedSize(const StationSpec *statspec)
 909         {
 910                 if (statspec == nullptr || _settings_client.gui.station_dragdrop) return;
 911
 912                 /* If current number of tracks is not allowed, make it as big as possible */
 913                 if (HasBit(statspec->disallowed_platforms, _settings_client.gui.station_numtracks - 1)) {
 914                         this->RaiseWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
 915                         _settings_client.gui.station_numtracks = 1;
 916                         if (statspec->disallowed_platforms != UINT8_MAX) {
 917                                 while (HasBit(statspec->disallowed_platforms, _settings_client.gui.station_numtracks - 1)) {
 918                                         _settings_client.gui.station_numtracks++;
 919                                 }
 920                                 this->LowerWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
 921                         }
 922                 }
 923
 924                 if (HasBit(statspec->disallowed_lengths, _settings_client.gui.station_platlength - 1)) {
 925                         this->RaiseWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
 926                         _settings_client.gui.station_platlength = 1;
 927                         if (statspec->disallowed_lengths != UINT8_MAX) {
 928                                 while (HasBit(statspec->disallowed_lengths, _settings_client.gui.station_platlength - 1)) {
 929                                         _settings_client.gui.station_platlength++;
 930                                 }
 931                                 this->LowerWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
 932                         }
 933                 }
 934         }
 935
 936 public:
 937         BuildRailStationWindow(WindowDesc *desc, Window *parent, bool newstation) : PickerWindowBase(desc, parent)
 938         {
 939                 this->coverage_height = 2 * FONT_HEIGHT_NORMAL + 3 * WD_PAR_VSEP_NORMAL;
 940                 this->vscroll = nullptr;
 941                 _railstation.newstations = newstation;
 942
 943                 this->CreateNestedTree();
 944                 NWidgetStacked *newst_additions = this->GetWidget<NWidgetStacked>(WID_BRAS_SHOW_NEWST_ADDITIONS);
 945                 newst_additions->SetDisplayedPlane(newstation ? 0 : SZSP_NONE);
 946                 newst_additions = this->GetWidget<NWidgetStacked>(WID_BRAS_SHOW_NEWST_MATRIX);
 947                 newst_additions->SetDisplayedPlane(newstation ? 0 : SZSP_NONE);
 948                 newst_additions = this->GetWidget<NWidgetStacked>(WID_BRAS_SHOW_NEWST_DEFSIZE);
 949                 newst_additions->SetDisplayedPlane(newstation ? 0 : SZSP_NONE);
 950                 newst_additions = this->GetWidget<NWidgetStacked>(WID_BRAS_SHOW_NEWST_RESIZE);
 951                 newst_additions->SetDisplayedPlane(newstation ? 0 : SZSP_NONE);
 952                 if (newstation) {
 953                         this->vscroll = this->GetScrollbar(WID_BRAS_NEWST_SCROLL);
 954                         this->vscroll2 = this->GetScrollbar(WID_BRAS_MATRIX_SCROLL);
 955                 }
 956                 this->FinishInitNested(TRANSPORT_RAIL);
 957
 958                 this->LowerWidget(_railstation.orientation + WID_BRAS_PLATFORM_DIR_X);
 959                 if (_settings_client.gui.station_dragdrop) {
 960                         this->LowerWidget(WID_BRAS_PLATFORM_DRAG_N_DROP);
 961                 } else {
 962                         this->LowerWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
 963                         this->LowerWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
 964                 }
 965                 this->SetWidgetLoweredState(WID_BRAS_HIGHLIGHT_OFF, !_settings_client.gui.station_show_coverage);
 966                 this->SetWidgetLoweredState(WID_BRAS_HIGHLIGHT_ON, _settings_client.gui.station_show_coverage);
 967
 968                 if (!newstation || _railstation.station_class >= (int)StationClass::GetClassCount()) {
 969                         /* New stations are not available or changed, so ensure the default station
 970                          * type is 'selected'. */
 971                         _railstation.station_class = STAT_CLASS_DFLT;
 972                         _railstation.station_type = 0;
 973                         this->vscroll2 = nullptr;
 974                 }
 975                 if (newstation) {
 976                         _railstation.station_count = StationClass::Get(_railstation.station_class)->GetSpecCount();
 977                         _railstation.station_type = min(_railstation.station_type, _railstation.station_count - 1);
 978
 979                         int count = 0;
 980                         for (uint i = 0; i < StationClass::GetClassCount(); i++) {
 981                                 if (i == STAT_CLASS_WAYP) continue;
 982                                 count++;
 983                         }
 984                         this->vscroll->SetCount(count);
 985                         this->vscroll->SetPosition(Clamp(_railstation.station_class - 2, 0, max(this->vscroll->GetCount() - this->vscroll->GetCapacity(), 0)));
 986
 987                         NWidgetMatrix *matrix = this->GetWidget<NWidgetMatrix>(WID_BRAS_MATRIX);
 988                         matrix->SetScrollbar(this->vscroll2);
 989                         matrix->SetCount(_railstation.station_count);
 990                         matrix->SetClicked(_railstation.station_type);
 991                 }
 992         }
 993
 994         virtual ~BuildRailStationWindow()
 995         {
 996                 DeleteWindowById(WC_SELECT_STATION, 0);
 997         }
 998
 999         void OnPaint() override
1000         {
1001                 bool newstations = _railstation.newstations;
1002                 const StationSpec *statspec = newstations ? StationClass::Get(_railstation.station_class)->GetSpec(_railstation.station_type) : nullptr;
1003
1004                 if (_settings_client.gui.station_dragdrop) {
1005                         SetTileSelectSize(1, 1);
1006                 } else {
1007                         int x = _settings_client.gui.station_numtracks;
1008                         int y = _settings_client.gui.station_platlength;
1009                         if (_railstation.orientation == AXIS_X) Swap(x, y);
1010                         if (!_remove_button_clicked) {
1011                                 SetTileSelectSize(x, y);
1012                         }
1013                 }
1014
1015                 int rad = (_settings_game.station.modified_catchment) ? CA_TRAIN : CA_UNMODIFIED;
1016
1017                 if (_settings_client.gui.station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
1018
1019                 for (uint bits = 0; bits < 7; bits++) {
1020                         bool disable = bits >= _settings_game.station.station_spread;
1021                         if (statspec == nullptr) {
1022                                 this->SetWidgetDisabledState(bits + WID_BRAS_PLATFORM_NUM_1, disable);
1023                                 this->SetWidgetDisabledState(bits + WID_BRAS_PLATFORM_LEN_1, disable);
1024                         } else {
1025                                 this->SetWidgetDisabledState(bits + WID_BRAS_PLATFORM_NUM_1, HasBit(statspec->disallowed_platforms, bits) || disable);
1026                                 this->SetWidgetDisabledState(bits + WID_BRAS_PLATFORM_LEN_1, HasBit(statspec->disallowed_lengths,   bits) || disable);
1027                         }
1028                 }
1029
1030                 this->DrawWidgets();
1031
1032                 if (this->IsShaded()) return;
1033                 /* 'Accepts' and 'Supplies' texts. */
1034                 NWidgetBase *cov = this->GetWidget<NWidgetBase>(WID_BRAS_COVERAGE_TEXTS);
1035                 int top = cov->pos_y + WD_PAR_VSEP_NORMAL;
1036                 int left = cov->pos_x + WD_FRAMERECT_LEFT;
1037                 int right = cov->pos_x + cov->current_x - WD_FRAMERECT_RIGHT;
1038                 int bottom = cov->pos_y + cov->current_y;
1039                 top = DrawStationCoverageAreaText(left, right, top, SCT_ALL, rad, false) + WD_PAR_VSEP_NORMAL;
1040                 top = DrawStationCoverageAreaText(left, right, top, SCT_ALL, rad, true) + WD_PAR_VSEP_NORMAL;
1041                 /* Resize background if the window is too small.
1042                  * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
1043                  * (This is the case, if making the window bigger moves the mouse into the window.) */
1044                 if (top > bottom) {
1045                         this->coverage_height += top - bottom;
1046                         this->ReInit();
1047                 }
1048         }
1049
1050         void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
1051         {
1052                 switch (widget) {
1053                         case WID_BRAS_NEWST_LIST: {
1054                                 Dimension d = {0, 0};
1055                                 for (uint i = 0; i < StationClass::GetClassCount(); i++) {
1056                                         if (i == STAT_CLASS_WAYP) continue;
1057                                         d = maxdim(d, GetStringBoundingBox(StationClass::Get((StationClassID)i)->name));
1058                                 }
1059                                 size->width = max(size->width, d.width + padding.width);
1060                                 this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
1061                                 size->height = 5 * this->line_height;
1062                                 resize->height = this->line_height;
1063                                 break;
1064                         }
1065
1066                         case WID_BRAS_SHOW_NEWST_TYPE: {
1067                                 if (!_railstation.newstations) {
1068                                         size->width = 0;
1069                                         size->height = 0;
1070                                         break;
1071                                 }
1072
1073                                 /* If newstations exist, compute the non-zero minimal size. */
1074                                 Dimension d = {0, 0};
1075                                 StringID str = this->GetWidget<NWidgetCore>(widget)->widget_data;
1076                                 for (StationClassID statclass = STAT_CLASS_BEGIN; statclass < (StationClassID)StationClass::GetClassCount(); statclass++) {
1077                                         if (statclass == STAT_CLASS_WAYP) continue;
1078                                         StationClass *stclass = StationClass::Get(statclass);
1079                                         for (uint16 j = 0; j < stclass->GetSpecCount(); j++) {
1080                                                 const StationSpec *statspec = stclass->GetSpec(j);
1081                                                 SetDParam(0, (statspec != nullptr && statspec->name != 0) ? statspec->name : STR_STATION_CLASS_DFLT);
1082                                                 d = maxdim(d, GetStringBoundingBox(str));
1083                                         }
1084                                 }
1085                                 size->width = max(size->width, d.width + padding.width);
1086                                 break;
1087                         }
1088
1089                         case WID_BRAS_PLATFORM_DIR_X:
1090                         case WID_BRAS_PLATFORM_DIR_Y:
1091                         case WID_BRAS_IMAGE:
1092                                 size->width  = ScaleGUITrad(64) + 2;
1093                                 size->height = ScaleGUITrad(58) + 2;
1094                                 break;
1095
1096                         case WID_BRAS_COVERAGE_TEXTS:
1097                                 size->height = this->coverage_height;
1098                                 break;
1099
1100                         case WID_BRAS_MATRIX:
1101                                 fill->height = 1;
1102                                 resize->height = 1;
1103                                 break;
1104                 }
1105         }
1106
1107         void DrawWidget(const Rect &r, int widget) const override
1108         {
1109                 DrawPixelInfo tmp_dpi;
1110
1111                 switch (GB(widget, 0, 16)) {
1112                         case WID_BRAS_PLATFORM_DIR_X:
1113                                 /* Set up a clipping area for the '/' station preview */
1114                                 if (FillDrawPixelInfo(&tmp_dpi, r.left, r.top, r.right - r.left + 1, r.bottom - r.top + 1)) {
1115                                         DrawPixelInfo *old_dpi = _cur_dpi;
1116                                         _cur_dpi = &tmp_dpi;
1117                                         int x = ScaleGUITrad(31) + 1;
1118                                         int y = r.bottom - r.top - ScaleGUITrad(31);
1119                                         if (!DrawStationTile(x, y, _cur_railtype, AXIS_X, _railstation.station_class, _railstation.station_type)) {
1120                                                 StationPickerDrawSprite(x, y, STATION_RAIL, _cur_railtype, INVALID_ROADTYPE, 2);
1121                                         }
1122                                         _cur_dpi = old_dpi;
1123                                 }
1124                                 break;
1125
1126                         case WID_BRAS_PLATFORM_DIR_Y:
1127                                 /* Set up a clipping area for the '\' station preview */
1128                                 if (FillDrawPixelInfo(&tmp_dpi, r.left, r.top, r.right - r.left + 1, r.bottom - r.top + 1)) {
1129                                         DrawPixelInfo *old_dpi = _cur_dpi;
1130                                         _cur_dpi = &tmp_dpi;
1131                                         int x = ScaleGUITrad(31) + 1;
1132                                         int y = r.bottom - r.top - ScaleGUITrad(31);
1133                                         if (!DrawStationTile(x, y, _cur_railtype, AXIS_Y, _railstation.station_class, _railstation.station_type)) {
1134                                                 StationPickerDrawSprite(x, y, STATION_RAIL, _cur_railtype, INVALID_ROADTYPE, 3);
1135                                         }
1136                                         _cur_dpi = old_dpi;
1137                                 }
1138                                 break;
1139
1140                         case WID_BRAS_NEWST_LIST: {
1141                                 uint statclass = 0;
1142                                 uint row = 0;
1143                                 for (uint i = 0; i < StationClass::GetClassCount(); i++) {
1144                                         if (i == STAT_CLASS_WAYP) continue;
1145                                         if (this->vscroll->IsVisible(statclass)) {
1146                                                 DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_RIGHT, row * this->line_height + r.top + WD_MATRIX_TOP,
1147                                                                 StationClass::Get((StationClassID)i)->name,
1148                                                                 (StationClassID)i == _railstation.station_class ? TC_WHITE : TC_BLACK);
1149                                                 row++;
1150                                         }
1151                                         statclass++;
1152                                 }
1153                                 break;
1154                         }
1155
1156                         case WID_BRAS_IMAGE: {
1157                                 byte type = GB(widget, 16, 16);
1158                                 assert(type < _railstation.station_count);
1159                                 /* Check station availability callback */
1160                                 const StationSpec *statspec = StationClass::Get(_railstation.station_class)->GetSpec(type);
1161                                 if (!IsStationAvailable(statspec)) {
1162                                         GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, PC_BLACK, FILLRECT_CHECKER);
1163                                 }
1164
1165                                 /* Set up a clipping area for the station preview. */
1166                                 if (FillDrawPixelInfo(&tmp_dpi, r.left, r.top, r.right - r.left + 1, r.bottom - r.top + 1)) {
1167                                         DrawPixelInfo *old_dpi = _cur_dpi;
1168                                         _cur_dpi = &tmp_dpi;
1169                                         int x = ScaleGUITrad(31) + 1;
1170                                         int y = r.bottom - r.top - ScaleGUITrad(31);
1171                                         if (!DrawStationTile(x, y, _cur_railtype, _railstation.orientation, _railstation.station_class, type)) {
1172                                                 StationPickerDrawSprite(x, y, STATION_RAIL, _cur_railtype, INVALID_ROADTYPE, 2 + _railstation.orientation);
1173                                         }
1174                                         _cur_dpi = old_dpi;
1175                                 }
1176                                 break;
1177                         }
1178                 }
1179         }
1180
1181         void OnResize() override
1182         {
1183                 if (this->vscroll != nullptr) { // New stations available.
1184                         this->vscroll->SetCapacityFromWidget(this, WID_BRAS_NEWST_LIST);
1185                 }
1186         }
1187
1188         void SetStringParameters(int widget) const override
1189         {
1190                 if (widget == WID_BRAS_SHOW_NEWST_TYPE) {
1191                         const StationSpec *statspec = StationClass::Get(_railstation.station_class)->GetSpec(_railstation.station_type);
1192                         SetDParam(0, (statspec != nullptr && statspec->name != 0) ? statspec->name : STR_STATION_CLASS_DFLT);
1193                 }
1194         }
1195
1196         void OnClick(Point pt, int widget, int click_count) override
1197         {
1198                 switch (GB(widget, 0, 16)) {
1199                         case WID_BRAS_PLATFORM_DIR_X:
1200                         case WID_BRAS_PLATFORM_DIR_Y:
1201                                 this->RaiseWidget(_railstation.orientation + WID_BRAS_PLATFORM_DIR_X);
1202                                 _railstation.orientation = (Axis)(widget - WID_BRAS_PLATFORM_DIR_X);
1203                                 this->LowerWidget(_railstation.orientation + WID_BRAS_PLATFORM_DIR_X);
1204                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1205                                 this->SetDirty();
1206                                 DeleteWindowById(WC_SELECT_STATION, 0);
1207                                 break;
1208
1209                         case WID_BRAS_PLATFORM_NUM_1:
1210                         case WID_BRAS_PLATFORM_NUM_2:
1211                         case WID_BRAS_PLATFORM_NUM_3:
1212                         case WID_BRAS_PLATFORM_NUM_4:
1213                         case WID_BRAS_PLATFORM_NUM_5:
1214                         case WID_BRAS_PLATFORM_NUM_6:
1215                         case WID_BRAS_PLATFORM_NUM_7: {
1216                                 this->RaiseWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
1217                                 this->RaiseWidget(WID_BRAS_PLATFORM_DRAG_N_DROP);
1218
1219                                 _settings_client.gui.station_numtracks = widget - WID_BRAS_PLATFORM_NUM_BEGIN;
1220                                 _settings_client.gui.station_dragdrop = false;
1221
1222                                 _settings_client.gui.station_dragdrop = false;
1223
1224                                 const StationSpec *statspec = _railstation.newstations ? StationClass::Get(_railstation.station_class)->GetSpec(_railstation.station_type) : nullptr;
1225                                 if (statspec != nullptr && HasBit(statspec->disallowed_lengths, _settings_client.gui.station_platlength - 1)) {
1226                                         /* The previously selected number of platforms in invalid */
1227                                         for (uint i = 0; i < 7; i++) {
1228                                                 if (!HasBit(statspec->disallowed_lengths, i)) {
1229                                                         this->RaiseWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
1230                                                         _settings_client.gui.station_platlength = i + 1;
1231                                                         break;
1232                                                 }
1233                                         }
1234                                 }
1235
1236                                 this->LowerWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
1237                                 this->LowerWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
1238                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1239                                 this->SetDirty();
1240                                 DeleteWindowById(WC_SELECT_STATION, 0);
1241                                 break;
1242                         }
1243
1244                         case WID_BRAS_PLATFORM_LEN_1:
1245                         case WID_BRAS_PLATFORM_LEN_2:
1246                         case WID_BRAS_PLATFORM_LEN_3:
1247                         case WID_BRAS_PLATFORM_LEN_4:
1248                         case WID_BRAS_PLATFORM_LEN_5:
1249                         case WID_BRAS_PLATFORM_LEN_6:
1250                         case WID_BRAS_PLATFORM_LEN_7: {
1251                                 this->RaiseWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
1252                                 this->RaiseWidget(WID_BRAS_PLATFORM_DRAG_N_DROP);
1253
1254                                 _settings_client.gui.station_platlength = widget - WID_BRAS_PLATFORM_LEN_BEGIN;
1255                                 _settings_client.gui.station_dragdrop = false;
1256
1257                                 _settings_client.gui.station_dragdrop = false;
1258
1259                                 const StationSpec *statspec = _railstation.newstations ? StationClass::Get(_railstation.station_class)->GetSpec(_railstation.station_type) : nullptr;
1260                                 if (statspec != nullptr && HasBit(statspec->disallowed_platforms, _settings_client.gui.station_numtracks - 1)) {
1261                                         /* The previously selected number of tracks in invalid */
1262                                         for (uint i = 0; i < 7; i++) {
1263                                                 if (!HasBit(statspec->disallowed_platforms, i)) {
1264                                                         this->RaiseWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
1265                                                         _settings_client.gui.station_numtracks = i + 1;
1266                                                         break;
1267                                                 }
1268                                         }
1269                                 }
1270
1271                                 this->LowerWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
1272                                 this->LowerWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
1273                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1274                                 this->SetDirty();
1275                                 DeleteWindowById(WC_SELECT_STATION, 0);
1276                                 break;
1277                         }
1278
1279                         case WID_BRAS_PLATFORM_DRAG_N_DROP: {
1280                                 _settings_client.gui.station_dragdrop ^= true;
1281
1282                                 this->ToggleWidgetLoweredState(WID_BRAS_PLATFORM_DRAG_N_DROP);
1283
1284                                 /* get the first allowed length/number of platforms */
1285                                 const StationSpec *statspec = _railstation.newstations ? StationClass::Get(_railstation.station_class)->GetSpec(_railstation.station_type) : nullptr;
1286                                 if (statspec != nullptr && HasBit(statspec->disallowed_lengths, _settings_client.gui.station_platlength - 1)) {
1287                                         for (uint i = 0; i < 7; i++) {
1288                                                 if (!HasBit(statspec->disallowed_lengths, i)) {
1289                                                         this->RaiseWidget(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN);
1290                                                         _settings_client.gui.station_platlength = i + 1;
1291                                                         break;
1292                                                 }
1293                                         }
1294                                 }
1295                                 if (statspec != nullptr && HasBit(statspec->disallowed_platforms, _settings_client.gui.station_numtracks - 1)) {
1296                                         for (uint i = 0; i < 7; i++) {
1297                                                 if (!HasBit(statspec->disallowed_platforms, i)) {
1298                                                         this->RaiseWidget(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN);
1299                                                         _settings_client.gui.station_numtracks = i + 1;
1300                                                         break;
1301                                                 }
1302                                         }
1303                                 }
1304
1305                                 this->SetWidgetLoweredState(_settings_client.gui.station_numtracks + WID_BRAS_PLATFORM_NUM_BEGIN, !_settings_client.gui.station_dragdrop);
1306                                 this->SetWidgetLoweredState(_settings_client.gui.station_platlength + WID_BRAS_PLATFORM_LEN_BEGIN, !_settings_client.gui.station_dragdrop);
1307                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1308                                 this->SetDirty();
1309                                 DeleteWindowById(WC_SELECT_STATION, 0);
1310                                 break;
1311                         }
1312
1313                         case WID_BRAS_HIGHLIGHT_OFF:
1314                         case WID_BRAS_HIGHLIGHT_ON:
1315                                 _settings_client.gui.station_show_coverage = (widget != WID_BRAS_HIGHLIGHT_OFF);
1316
1317                                 this->SetWidgetLoweredState(WID_BRAS_HIGHLIGHT_OFF, !_settings_client.gui.station_show_coverage);
1318                                 this->SetWidgetLoweredState(WID_BRAS_HIGHLIGHT_ON, _settings_client.gui.station_show_coverage);
1319                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1320                                 this->SetDirty();
1321                                 break;
1322
1323                         case WID_BRAS_NEWST_LIST: {
1324                                 int y = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_BRAS_NEWST_LIST, 0, this->line_height);
1325                                 if (y >= (int)StationClass::GetClassCount()) return;
1326                                 for (uint i = 0; i < StationClass::GetClassCount(); i++) {
1327                                         if (i == STAT_CLASS_WAYP) continue;
1328                                         if (y == 0) {
1329                                                 if (_railstation.station_class != (StationClassID)i) {
1330                                                         _railstation.station_class = (StationClassID)i;
1331                                                         StationClass *stclass = StationClass::Get(_railstation.station_class);
1332                                                         _railstation.station_count = stclass->GetSpecCount();
1333                                                         _railstation.station_type  = min((int)_railstation.station_type, max(0, (int)_railstation.station_count - 1));
1334
1335                                                         this->CheckSelectedSize(stclass->GetSpec(_railstation.station_type));
1336
1337                                                         NWidgetMatrix *matrix = this->GetWidget<NWidgetMatrix>(WID_BRAS_MATRIX);
1338                                                         matrix->SetCount(_railstation.station_count);
1339                                                         matrix->SetClicked(_railstation.station_type);
1340                                                 }
1341                                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1342                                                 this->SetDirty();
1343                                                 DeleteWindowById(WC_SELECT_STATION, 0);
1344                                                 break;
1345                                         }
1346                                         y--;
1347                                 }
1348                                 break;
1349                         }
1350
1351                         case WID_BRAS_IMAGE: {
1352                                 int y = GB(widget, 16, 16);
1353                                 if (y >= _railstation.station_count) return;
1354
1355                                 /* Check station availability callback */
1356                                 const StationSpec *statspec = StationClass::Get(_railstation.station_class)->GetSpec(y);
1357                                 if (!IsStationAvailable(statspec)) return;
1358
1359                                 _railstation.station_type = y;
1360
1361                                 this->CheckSelectedSize(statspec);
1362                                 this->GetWidget<NWidgetMatrix>(WID_BRAS_MATRIX)->SetClicked(_railstation.station_type);
1363
1364                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1365                                 this->SetDirty();
1366                                 DeleteWindowById(WC_SELECT_STATION, 0);
1367                                 break;
1368                         }
1369                 }
1370         }
1371
1372         void OnRealtimeTick(uint delta_ms) override
1373         {
1374                 CheckRedrawStationCoverage(this);
1375         }
1376 };
1377
1378 static const NWidgetPart _nested_station_builder_widgets[] = {
1379         NWidget(NWID_HORIZONTAL),
1380                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
1381                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_RAIL_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
1382                 NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
1383                 NWidget(NWID_SELECTION, INVALID_COLOUR, WID_BRAS_SHOW_NEWST_DEFSIZE),
1384                         NWidget(WWT_DEFSIZEBOX, COLOUR_DARK_GREEN),
1385                 EndContainer(),
1386         EndContainer(),
1387         NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
1388                 NWidget(NWID_HORIZONTAL),
1389                         NWidget(NWID_VERTICAL),
1390                                 NWidget(NWID_SELECTION, INVALID_COLOUR, WID_BRAS_SHOW_NEWST_ADDITIONS),
1391                                         NWidget(NWID_HORIZONTAL), SetPIP(7, 0, 7), SetPadding(2, 0, 1, 0),
1392                                                 NWidget(WWT_MATRIX, COLOUR_GREY, WID_BRAS_NEWST_LIST), SetMinimalSize(122, 71), SetFill(1, 0),
1393                                                                 SetMatrixDataTip(1, 0, STR_STATION_BUILD_STATION_CLASS_TOOLTIP), SetScrollbar(WID_BRAS_NEWST_SCROLL),
1394                                                 NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_BRAS_NEWST_SCROLL),
1395                                         EndContainer(),
1396                                 EndContainer(),
1397                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(144, 11), SetDataTip(STR_STATION_BUILD_ORIENTATION, STR_NULL), SetPadding(1, 2, 0, 2),
1398                                 NWidget(NWID_HORIZONTAL),
1399                                         NWidget(NWID_SPACER), SetMinimalSize(7, 0), SetFill(1, 0),
1400                                         NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAS_PLATFORM_DIR_X), SetMinimalSize(66, 60), SetFill(0, 0), SetDataTip(0x0, STR_STATION_BUILD_RAILROAD_ORIENTATION_TOOLTIP), EndContainer(),
1401                                         NWidget(NWID_SPACER), SetMinimalSize(2, 0), SetFill(1, 0),
1402                                         NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAS_PLATFORM_DIR_Y), SetMinimalSize(66, 60), SetFill(0, 0), SetDataTip(0x0, STR_STATION_BUILD_RAILROAD_ORIENTATION_TOOLTIP), EndContainer(),
1403                                         NWidget(NWID_SPACER), SetMinimalSize(7, 0), SetFill(1, 0),
1404                                 EndContainer(),
1405                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN, WID_BRAS_SHOW_NEWST_TYPE), SetMinimalSize(144, 11), SetDataTip(STR_ORANGE_STRING, STR_NULL), SetPadding(1, 2, 4, 2),
1406                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(144, 11), SetDataTip(STR_STATION_BUILD_NUMBER_OF_TRACKS, STR_NULL), SetPadding(0, 2, 0, 2),
1407                                 NWidget(NWID_HORIZONTAL),
1408                                         NWidget(NWID_SPACER), SetFill(1, 0),
1409                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_1), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_1, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1410                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_2), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_2, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1411                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_3), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_3, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1412                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_4), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_4, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1413                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_5), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_5, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1414                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_6), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_6, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1415                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_NUM_7), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_7, STR_STATION_BUILD_NUMBER_OF_TRACKS_TOOLTIP),
1416                                         NWidget(NWID_SPACER), SetFill(1, 0),
1417                                 EndContainer(),
1418                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(144, 11), SetDataTip(STR_STATION_BUILD_PLATFORM_LENGTH, STR_NULL), SetPadding(2, 2, 0, 2),
1419                                 NWidget(NWID_HORIZONTAL),
1420                                         NWidget(NWID_SPACER), SetFill(1, 0),
1421                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_1), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_1, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1422                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_2), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_2, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1423                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_3), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_3, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1424                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_4), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_4, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1425                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_5), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_5, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1426                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_6), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_6, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1427                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_LEN_7), SetMinimalSize(15, 12), SetDataTip(STR_BLACK_7, STR_STATION_BUILD_PLATFORM_LENGTH_TOOLTIP),
1428                                         NWidget(NWID_SPACER), SetFill(1, 0),
1429                                 EndContainer(),
1430                                 NWidget(NWID_SPACER), SetMinimalSize(0, 2),
1431                                 NWidget(NWID_HORIZONTAL),
1432                                         NWidget(NWID_SPACER), SetMinimalSize(2, 0), SetFill(1, 0),
1433                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_PLATFORM_DRAG_N_DROP), SetMinimalSize(75, 12), SetDataTip(STR_STATION_BUILD_DRAG_DROP, STR_STATION_BUILD_DRAG_DROP_TOOLTIP),
1434                                         NWidget(NWID_SPACER), SetMinimalSize(2, 0), SetFill(1, 0),
1435                                 EndContainer(),
1436                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(144, 11), SetDataTip(STR_STATION_BUILD_COVERAGE_AREA_TITLE, STR_NULL), SetPadding(3, 2, 0, 2),
1437                                 NWidget(NWID_HORIZONTAL),
1438                                         NWidget(NWID_SPACER), SetMinimalSize(2, 0), SetFill(1, 0),
1439                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_HIGHLIGHT_OFF), SetMinimalSize(60, 12),
1440                                                                                                 SetDataTip(STR_STATION_BUILD_COVERAGE_OFF, STR_STATION_BUILD_COVERAGE_AREA_OFF_TOOLTIP),
1441                                         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_BRAS_HIGHLIGHT_ON), SetMinimalSize(60, 12),
1442                                                                                                 SetDataTip(STR_STATION_BUILD_COVERAGE_ON, STR_STATION_BUILD_COVERAGE_AREA_ON_TOOLTIP),
1443                                         NWidget(NWID_SPACER), SetMinimalSize(2, 0), SetFill(1, 0),
1444                                 EndContainer(),
1445                         EndContainer(),
1446                         NWidget(NWID_SELECTION, INVALID_COLOUR, WID_BRAS_SHOW_NEWST_MATRIX),
1447                                 /* We need an additional background for the matrix, as the matrix cannot handle the scrollbar due to not being an NWidgetCore. */
1448                                 NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetScrollbar(WID_BRAS_MATRIX_SCROLL),
1449                                         NWidget(NWID_HORIZONTAL),
1450                                                 NWidget(NWID_MATRIX, COLOUR_DARK_GREEN, WID_BRAS_MATRIX), SetScrollbar(WID_BRAS_MATRIX_SCROLL), SetPIP(0, 2, 0), SetPadding(2, 0, 0, 0),
1451                                                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BRAS_IMAGE), SetMinimalSize(66, 60),
1452                                                                         SetFill(0, 0), SetResize(0, 0), SetDataTip(0x0, STR_STATION_BUILD_STATION_TYPE_TOOLTIP), SetScrollbar(WID_BRAS_MATRIX_SCROLL),
1453                                                         EndContainer(),
1454                                                 EndContainer(),
1455                                                 NWidget(NWID_VSCROLLBAR, COLOUR_DARK_GREEN, WID_BRAS_MATRIX_SCROLL),
1456                                         EndContainer(),
1457                                 EndContainer(),
1458                         EndContainer(),
1459                 EndContainer(),
1460                 NWidget(NWID_HORIZONTAL),
1461                         NWidget(WWT_EMPTY, INVALID_COLOUR, WID_BRAS_COVERAGE_TEXTS), SetFill(1, 1), SetResize(1, 0),
1462                         NWidget(NWID_SELECTION, INVALID_COLOUR, WID_BRAS_SHOW_NEWST_RESIZE),
1463                                 NWidget(NWID_VERTICAL),
1464                                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetFill(0, 1), EndContainer(),
1465                                         NWidget(WWT_RESIZEBOX, COLOUR_DARK_GREEN),
1466                                 EndContainer(),
1467                         EndContainer(),
1468                 EndContainer(),
1469         EndContainer(),
1470 };
1471
1472 /** High level window description of the station-build window (default & newGRF) */
1473 static WindowDesc _station_builder_desc(
1474         WDP_AUTO, "build_station_rail", 350, 0,
1475         WC_BUILD_STATION, WC_BUILD_TOOLBAR,
1476         WDF_CONSTRUCTION,
1477         _nested_station_builder_widgets, lengthof(_nested_station_builder_widgets)
1478 );
1479
1480 /** Open station build window */
1481 static void ShowStationBuilder(Window *parent)
1482 {
1483         bool newstations = StationClass::GetClassCount() > 2 || StationClass::Get(STAT_CLASS_DFLT)->GetSpecCount() != 1;
1484         new BuildRailStationWindow(&_station_builder_desc, parent, newstations);
1485 }
1486
1487 struct BuildSignalWindow : public PickerWindowBase {
1488 private:
1489         Dimension sig_sprite_size;     ///< Maximum size of signal GUI sprites.
1490         int sig_sprite_bottom_offset;  ///< Maximum extent of signal GUI sprite from reference point towards bottom.
1491
1492         /**
1493          * Draw dynamic a signal-sprite in a button in the signal GUI
1494          * Draw the sprite +1px to the right and down if the button is lowered
1495          *
1496          * @param widget_index index of this widget in the window
1497          * @param image        the sprite to draw
1498          */
1499         void DrawSignalSprite(byte widget_index, SpriteID image) const
1500         {
1501                 Point offset;
1502                 Dimension sprite_size = GetSpriteSize(image, &offset);
1503                 const NWidgetBase *widget = this->GetWidget<NWidgetBase>(widget_index);
1504                 int x = widget->pos_x - offset.x +
1505                                 (widget->current_x - sprite_size.width + offset.x) / 2;  // centered
1506                 int y = widget->pos_y - sig_sprite_bottom_offset + WD_IMGBTN_TOP +
1507                                 (widget->current_y - WD_IMGBTN_TOP - WD_IMGBTN_BOTTOM + sig_sprite_size.height) / 2; // aligned to bottom
1508
1509                 DrawSprite(image, PAL_NONE,
1510                                 x + this->IsWidgetLowered(widget_index),
1511                                 y + this->IsWidgetLowered(widget_index));
1512         }
1513
1514 public:
1515         BuildSignalWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
1516         {
1517                 this->InitNested(TRANSPORT_RAIL);
1518                 this->OnInvalidateData();
1519         }
1520
1521         ~BuildSignalWindow()
1522         {
1523                 _convert_signal_button = false;
1524         }
1525
1526         void OnInit() override
1527         {
1528                 /* Calculate maximum signal sprite size. */
1529                 this->sig_sprite_size.width = 0;
1530                 this->sig_sprite_size.height = 0;
1531                 this->sig_sprite_bottom_offset = 0;
1532                 const RailtypeInfo *rti = GetRailTypeInfo(_cur_railtype);
1533                 for (uint type = SIGTYPE_NORMAL; type < SIGTYPE_END; type++) {
1534                         for (uint variant = SIG_ELECTRIC; variant <= SIG_SEMAPHORE; variant++) {
1535                                 for (uint lowered = 0; lowered < 2; lowered++) {
1536                                         Point offset;
1537                                         Dimension sprite_size = GetSpriteSize(rti->gui_sprites.signals[type][variant][lowered], &offset);
1538                                         this->sig_sprite_bottom_offset = max<int>(this->sig_sprite_bottom_offset, sprite_size.height);
1539                                         this->sig_sprite_size.width = max<int>(this->sig_sprite_size.width, sprite_size.width - offset.x);
1540                                         this->sig_sprite_size.height = max<int>(this->sig_sprite_size.height, sprite_size.height - offset.y);
1541                                 }
1542                         }
1543                 }
1544         }
1545
1546         void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
1547         {
1548                 if (widget == WID_BS_DRAG_SIGNALS_DENSITY_LABEL) {
1549                         /* Two digits for signals density. */
1550                         size->width = max(size->width, 2 * GetDigitWidth() + padding.width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT);
1551                 } else if (IsInsideMM(widget, WID_BS_SEMAPHORE_NORM, WID_BS_ELECTRIC_PBS_OWAY + 1)) {
1552                         size->width = max(size->width, this->sig_sprite_size.width + WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT);
1553                         size->height = max(size->height, this->sig_sprite_size.height + WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM);
1554                 }
1555         }
1556
1557         void SetStringParameters(int widget) const override
1558         {
1559                 switch (widget) {
1560                         case WID_BS_DRAG_SIGNALS_DENSITY_LABEL:
1561                                 SetDParam(0, _settings_client.gui.drag_signals_density);
1562                                 break;
1563                 }
1564         }
1565
1566         void DrawWidget(const Rect &r, int widget) const override
1567         {
1568                 if (IsInsideMM(widget, WID_BS_SEMAPHORE_NORM, WID_BS_ELECTRIC_PBS_OWAY + 1)) {
1569                         /* Extract signal from widget number. */
1570                         int type = (widget - WID_BS_SEMAPHORE_NORM) % SIGTYPE_END;
1571                         int var = SIG_SEMAPHORE - (widget - WID_BS_SEMAPHORE_NORM) / SIGTYPE_END; // SignalVariant order is reversed compared to the widgets.
1572                         SpriteID sprite = GetRailTypeInfo(_cur_railtype)->gui_sprites.signals[type][var][this->IsWidgetLowered(widget)];
1573
1574                         this->DrawSignalSprite(widget, sprite);
1575                 }
1576         }
1577
1578         void OnClick(Point pt, int widget, int click_count) override
1579         {
1580                 switch (widget) {
1581                         case WID_BS_SEMAPHORE_NORM:
1582                         case WID_BS_SEMAPHORE_ENTRY:
1583                         case WID_BS_SEMAPHORE_EXIT:
1584                         case WID_BS_SEMAPHORE_COMBO:
1585                         case WID_BS_SEMAPHORE_PBS:
1586                         case WID_BS_SEMAPHORE_PBS_OWAY:
1587                         case WID_BS_ELECTRIC_NORM:
1588                         case WID_BS_ELECTRIC_ENTRY:
1589                         case WID_BS_ELECTRIC_EXIT:
1590                         case WID_BS_ELECTRIC_COMBO:
1591                         case WID_BS_ELECTRIC_PBS:
1592                         case WID_BS_ELECTRIC_PBS_OWAY:
1593                                 this->RaiseWidget((_cur_signal_variant == SIG_ELECTRIC ? WID_BS_ELECTRIC_NORM : WID_BS_SEMAPHORE_NORM) + _cur_signal_type);
1594
1595                                 _cur_signal_type = (SignalType)((uint)((widget - WID_BS_SEMAPHORE_NORM) % (SIGTYPE_LAST + 1)));
1596                                 _cur_signal_variant = widget >= WID_BS_ELECTRIC_NORM ? SIG_ELECTRIC : SIG_SEMAPHORE;
1597
1598                                 /* If 'remove' button of rail build toolbar is active, disable it. */
1599                                 if (_remove_button_clicked) {
1600                                         Window *w = FindWindowById(WC_BUILD_TOOLBAR, TRANSPORT_RAIL);
1601                                         if (w != nullptr) ToggleRailButton_Remove(w);
1602                                 }
1603
1604                                 break;
1605
1606                         case WID_BS_CONVERT:
1607                                 _convert_signal_button = !_convert_signal_button;
1608                                 break;
1609
1610                         case WID_BS_DRAG_SIGNALS_DENSITY_DECREASE:
1611                                 if (_settings_client.gui.drag_signals_density > 1) {
1612                                         _settings_client.gui.drag_signals_density--;
1613                                         SetWindowDirty(WC_GAME_OPTIONS, WN_GAME_OPTIONS_GAME_SETTINGS);
1614                                 }
1615                                 break;
1616
1617                         case WID_BS_DRAG_SIGNALS_DENSITY_INCREASE:
1618                                 if (_settings_client.gui.drag_signals_density < 20) {
1619                                         _settings_client.gui.drag_signals_density++;
1620                                         SetWindowDirty(WC_GAME_OPTIONS, WN_GAME_OPTIONS_GAME_SETTINGS);
1621                                 }
1622                                 break;
1623
1624                         default: break;
1625                 }
1626
1627                 this->InvalidateData();
1628         }
1629
1630         /**
1631          * Some data on this window has become invalid.
1632          * @param data Information about the changed data.
1633          * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
1634          */
1635         void OnInvalidateData(int data = 0, bool gui_scope = true) override
1636         {
1637                 if (!gui_scope) return;
1638                 this->LowerWidget((_cur_signal_variant == SIG_ELECTRIC ? WID_BS_ELECTRIC_NORM : WID_BS_SEMAPHORE_NORM) + _cur_signal_type);
1639
1640                 this->SetWidgetLoweredState(WID_BS_CONVERT, _convert_signal_button);
1641
1642                 this->SetWidgetDisabledState(WID_BS_DRAG_SIGNALS_DENSITY_DECREASE, _settings_client.gui.drag_signals_density == 1);
1643                 this->SetWidgetDisabledState(WID_BS_DRAG_SIGNALS_DENSITY_INCREASE, _settings_client.gui.drag_signals_density == 20);
1644         }
1645 };
1646
1647 /** Nested widget definition of the build signal window */
1648 static const NWidgetPart _nested_signal_builder_widgets[] = {
1649         NWidget(NWID_HORIZONTAL),
1650                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
1651                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_BUILD_SIGNAL_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
1652         EndContainer(),
1653         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
1654                 NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
1655                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_NORM), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_NORM_TOOLTIP), EndContainer(), SetFill(1, 1),
1656                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_ENTRY), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_ENTRY_TOOLTIP), EndContainer(), SetFill(1, 1),
1657                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_EXIT), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_EXIT_TOOLTIP), EndContainer(), SetFill(1, 1),
1658                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_COMBO), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_COMBO_TOOLTIP), EndContainer(), SetFill(1, 1),
1659                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_PBS), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_PBS_TOOLTIP), EndContainer(), SetFill(1, 1),
1660                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_SEMAPHORE_PBS_OWAY), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_SEMAPHORE_PBS_OWAY_TOOLTIP), EndContainer(), SetFill(1, 1),
1661                         NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_BS_CONVERT), SetDataTip(SPR_IMG_SIGNAL_CONVERT, STR_BUILD_SIGNAL_CONVERT_TOOLTIP), SetFill(1, 1),
1662                 EndContainer(),
1663                 NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
1664                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_NORM), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_NORM_TOOLTIP), EndContainer(), SetFill(1, 1),
1665                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_ENTRY), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_ENTRY_TOOLTIP), EndContainer(), SetFill(1, 1),
1666                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_EXIT), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_EXIT_TOOLTIP), EndContainer(), SetFill(1, 1),
1667                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_COMBO), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_COMBO_TOOLTIP), EndContainer(), SetFill(1, 1),
1668                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_PBS), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_PBS_TOOLTIP), EndContainer(), SetFill(1, 1),
1669                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BS_ELECTRIC_PBS_OWAY), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_ELECTRIC_PBS_OWAY_TOOLTIP), EndContainer(), SetFill(1, 1),
1670                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetDataTip(STR_NULL, STR_BUILD_SIGNAL_DRAG_SIGNALS_DENSITY_TOOLTIP), SetFill(1, 1),
1671                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN, WID_BS_DRAG_SIGNALS_DENSITY_LABEL), SetDataTip(STR_ORANGE_INT, STR_BUILD_SIGNAL_DRAG_SIGNALS_DENSITY_TOOLTIP), SetFill(1, 1),
1672                                 NWidget(NWID_HORIZONTAL), SetPIP(2, 0, 2),
1673                                         NWidget(NWID_SPACER), SetFill(1, 0),
1674                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_BS_DRAG_SIGNALS_DENSITY_DECREASE), SetMinimalSize(9, 12), SetDataTip(AWV_DECREASE, STR_BUILD_SIGNAL_DRAG_SIGNALS_DENSITY_DECREASE_TOOLTIP),
1675                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_BS_DRAG_SIGNALS_DENSITY_INCREASE), SetMinimalSize(9, 12), SetDataTip(AWV_INCREASE, STR_BUILD_SIGNAL_DRAG_SIGNALS_DENSITY_INCREASE_TOOLTIP),
1676                                         NWidget(NWID_SPACER), SetFill(1, 0),
1677                                 EndContainer(),
1678                                 NWidget(NWID_SPACER), SetMinimalSize(0, 2), SetFill(1, 0),
1679                         EndContainer(),
1680                 EndContainer(),
1681         EndContainer(),
1682 };
1683
1684 /** Signal selection window description */
1685 static WindowDesc _signal_builder_desc(
1686         WDP_AUTO, "build_signal", 0, 0,
1687         WC_BUILD_SIGNAL, WC_BUILD_TOOLBAR,
1688         WDF_CONSTRUCTION,
1689         _nested_signal_builder_widgets, lengthof(_nested_signal_builder_widgets)
1690 );
1691
1692 /**
1693  * Open the signal selection window
1694  */
1695 static void ShowSignalBuilder(Window *parent)
1696 {
1697         new BuildSignalWindow(&_signal_builder_desc, parent);
1698 }
1699
1700 struct BuildRailDepotWindow : public PickerWindowBase {
1701         BuildRailDepotWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
1702         {
1703                 this->InitNested(TRANSPORT_RAIL);
1704                 this->LowerWidget(_build_depot_direction + WID_BRAD_DEPOT_NE);
1705         }
1706
1707         void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
1708         {
1709                 if (!IsInsideMM(widget, WID_BRAD_DEPOT_NE, WID_BRAD_DEPOT_NW + 1)) return;
1710
1711                 size->width  = ScaleGUITrad(64) + 2;
1712                 size->height = ScaleGUITrad(48) + 2;
1713         }
1714
1715         void DrawWidget(const Rect &r, int widget) const override
1716         {
1717                 if (!IsInsideMM(widget, WID_BRAD_DEPOT_NE, WID_BRAD_DEPOT_NW + 1)) return;
1718
1719                 DrawTrainDepotSprite(r.left + 1 + ScaleGUITrad(31), r.bottom - ScaleGUITrad(31), widget - WID_BRAD_DEPOT_NE + DIAGDIR_NE, _cur_railtype);
1720         }
1721
1722         void OnClick(Point pt, int widget, int click_count) override
1723         {
1724                 switch (widget) {
1725                         case WID_BRAD_DEPOT_NE:
1726                         case WID_BRAD_DEPOT_SE:
1727                         case WID_BRAD_DEPOT_SW:
1728                         case WID_BRAD_DEPOT_NW:
1729                                 this->RaiseWidget(_build_depot_direction + WID_BRAD_DEPOT_NE);
1730                                 _build_depot_direction = (DiagDirection)(widget - WID_BRAD_DEPOT_NE);
1731                                 this->LowerWidget(_build_depot_direction + WID_BRAD_DEPOT_NE);
1732                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1733                                 this->SetDirty();
1734                                 break;
1735                 }
1736         }
1737 };
1738
1739 /** Nested widget definition of the build rail depot window */
1740 static const NWidgetPart _nested_build_depot_widgets[] = {
1741         NWidget(NWID_HORIZONTAL),
1742                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
1743                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_BUILD_DEPOT_TRAIN_ORIENTATION_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
1744         EndContainer(),
1745         NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
1746                 NWidget(NWID_SPACER), SetMinimalSize(0, 3),
1747                 NWidget(NWID_HORIZONTAL_LTR),
1748                         NWidget(NWID_SPACER), SetMinimalSize(3, 0), SetFill(1, 0),
1749                         NWidget(NWID_VERTICAL),
1750                                 NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAD_DEPOT_NW), SetMinimalSize(66, 50), SetDataTip(0x0, STR_BUILD_DEPOT_TRAIN_ORIENTATION_TOOLTIP),
1751                                 EndContainer(),
1752                                 NWidget(NWID_SPACER), SetMinimalSize(0, 2),
1753                                 NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAD_DEPOT_SW), SetMinimalSize(66, 50), SetDataTip(0x0, STR_BUILD_DEPOT_TRAIN_ORIENTATION_TOOLTIP),
1754                                 EndContainer(),
1755                         EndContainer(),
1756                         NWidget(NWID_SPACER), SetMinimalSize(2, 0),
1757                         NWidget(NWID_VERTICAL),
1758                                 NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAD_DEPOT_NE), SetMinimalSize(66, 50), SetDataTip(0x0, STR_BUILD_DEPOT_TRAIN_ORIENTATION_TOOLTIP),
1759                                 EndContainer(),
1760                                 NWidget(NWID_SPACER), SetMinimalSize(0, 2),
1761                                 NWidget(WWT_PANEL, COLOUR_GREY, WID_BRAD_DEPOT_SE), SetMinimalSize(66, 50), SetDataTip(0x0, STR_BUILD_DEPOT_TRAIN_ORIENTATION_TOOLTIP),
1762                                 EndContainer(),
1763                         EndContainer(),
1764                         NWidget(NWID_SPACER), SetMinimalSize(3, 0), SetFill(1, 0),
1765                 EndContainer(),
1766                 NWidget(NWID_SPACER), SetMinimalSize(0, 3),
1767         EndContainer(),
1768 };
1769
1770 static WindowDesc _build_depot_desc(
1771         WDP_AUTO, nullptr, 0, 0,
1772         WC_BUILD_DEPOT, WC_BUILD_TOOLBAR,
1773         WDF_CONSTRUCTION,
1774         _nested_build_depot_widgets, lengthof(_nested_build_depot_widgets)
1775 );
1776
1777 static void ShowBuildTrainDepotPicker(Window *parent)
1778 {
1779         new BuildRailDepotWindow(&_build_depot_desc, parent);
1780 }
1781
1782 struct BuildRailWaypointWindow : PickerWindowBase {
1783         BuildRailWaypointWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
1784         {
1785                 this->CreateNestedTree();
1786
1787                 NWidgetMatrix *matrix = this->GetWidget<NWidgetMatrix>(WID_BRW_WAYPOINT_MATRIX);
1788                 matrix->SetScrollbar(this->GetScrollbar(WID_BRW_SCROLL));
1789
1790                 this->FinishInitNested(TRANSPORT_RAIL);
1791
1792                 matrix->SetCount(_waypoint_count);
1793                 matrix->SetClicked(_cur_waypoint_type);
1794         }
1795
1796         void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
1797         {
1798                 switch (widget) {
1799                         case WID_BRW_WAYPOINT_MATRIX:
1800                                 /* Three blobs high and wide. */
1801                                 size->width  += resize->width  * 2;
1802                                 size->height += resize->height * 2;
1803
1804                                 /* Resizing in X direction only at blob size, but at pixel level in Y. */
1805                                 resize->height = 1;
1806                                 break;
1807
1808                         case WID_BRW_WAYPOINT:
1809                                 size->width  = ScaleGUITrad(64) + 2;
1810                                 size->height = ScaleGUITrad(58) + 2;
1811                                 break;
1812                 }
1813         }
1814
1815         void DrawWidget(const Rect &r, int widget) const override
1816         {
1817                 switch (GB(widget, 0, 16)) {
1818                         case WID_BRW_WAYPOINT: {
1819                                 byte type = GB(widget, 16, 16);
1820                                 const StationSpec *statspec = StationClass::Get(STAT_CLASS_WAYP)->GetSpec(type);
1821                                 DrawWaypointSprite(r.left + 1 + ScaleGUITrad(31), r.bottom - ScaleGUITrad(31), type, _cur_railtype);
1822
1823                                 if (!IsStationAvailable(statspec)) {
1824                                         GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, PC_BLACK, FILLRECT_CHECKER);
1825                                 }
1826                         }
1827                 }
1828         }
1829
1830         void OnClick(Point pt, int widget, int click_count) override
1831         {
1832                 switch (GB(widget, 0, 16)) {
1833                         case WID_BRW_WAYPOINT: {
1834                                 byte type = GB(widget, 16, 16);
1835                                 this->GetWidget<NWidgetMatrix>(WID_BRW_WAYPOINT_MATRIX)->SetClicked(_cur_waypoint_type);
1836
1837                                 /* Check station availability callback */
1838                                 const StationSpec *statspec = StationClass::Get(STAT_CLASS_WAYP)->GetSpec(type);
1839                                 if (!IsStationAvailable(statspec)) return;
1840
1841                                 _cur_waypoint_type = type;
1842                                 this->GetWidget<NWidgetMatrix>(WID_BRW_WAYPOINT_MATRIX)->SetClicked(_cur_waypoint_type);
1843                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
1844                                 this->SetDirty();
1845                                 break;
1846                         }
1847                 }
1848         }
1849 };
1850
1851 /** Nested widget definition for the build NewGRF rail waypoint window */
1852 static const NWidgetPart _nested_build_waypoint_widgets[] = {
1853         NWidget(NWID_HORIZONTAL),
1854                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
1855                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_WAYPOINT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
1856                 NWidget(WWT_DEFSIZEBOX, COLOUR_DARK_GREEN),
1857         EndContainer(),
1858         NWidget(NWID_HORIZONTAL),
1859                 NWidget(NWID_MATRIX, COLOUR_DARK_GREEN, WID_BRW_WAYPOINT_MATRIX), SetPIP(3, 2, 3), SetScrollbar(WID_BRW_SCROLL),
1860                         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_BRW_WAYPOINT), SetMinimalSize(66, 60), SetDataTip(0x0, STR_WAYPOINT_GRAPHICS_TOOLTIP), SetScrollbar(WID_BRW_SCROLL), EndContainer(),
1861                 EndContainer(),
1862                 NWidget(NWID_VERTICAL),
1863                         NWidget(NWID_VSCROLLBAR, COLOUR_DARK_GREEN, WID_BRW_SCROLL),
1864                         NWidget(WWT_RESIZEBOX, COLOUR_DARK_GREEN),
1865                 EndContainer(),
1866         EndContainer(),
1867 };
1868
1869 static WindowDesc _build_waypoint_desc(
1870         WDP_AUTO, "build_waypoint", 0, 0,
1871         WC_BUILD_WAYPOINT, WC_BUILD_TOOLBAR,
1872         WDF_CONSTRUCTION,
1873         _nested_build_waypoint_widgets, lengthof(_nested_build_waypoint_widgets)
1874 );
1875
1876 static void ShowBuildWaypointPicker(Window *parent)
1877 {
1878         new BuildRailWaypointWindow(&_build_waypoint_desc, parent);
1879 }
1880
1881 /**
1882  * Initialize rail building GUI settings
1883  */
1884 void InitializeRailGui()
1885 {
1886         _build_depot_direction = DIAGDIR_NW;
1887 }
1888
1889 /**
1890  * Re-initialize rail-build toolbar after toggling support for electric trains
1891  * @param disable Boolean whether electric trains are disabled (removed from the game)
1892  */
1893 void ReinitGuiAfterToggleElrail(bool disable)
1894 {
1895         extern RailType _last_built_railtype;
1896         if (disable && _last_built_railtype == RAILTYPE_ELECTRIC) {
1897                 _last_built_railtype = _cur_railtype = RAILTYPE_RAIL;
1898                 BuildRailToolbarWindow *w = dynamic_cast<BuildRailToolbarWindow *>(FindWindowById(WC_BUILD_TOOLBAR, TRANSPORT_RAIL));
1899                 if (w != nullptr) w->ModifyRailType(_cur_railtype);
1900         }
1901         MarkWholeScreenDirty();
1902 }
1903
1904 /** Set the initial (default) railtype to use */
1905 static void SetDefaultRailGui()
1906 {
1907         if (_local_company == COMPANY_SPECTATOR || !Company::IsValidID(_local_company)) return;
1908
1909         extern RailType _last_built_railtype;
1910         RailType rt = (RailType)(_settings_client.gui.default_rail_type + RAILTYPE_END);
1911         if (rt == DEF_RAILTYPE_MOST_USED) {
1912                 /* Find the most used rail type */
1913                 uint count[RAILTYPE_END];
1914                 memset(count, 0, sizeof(count));
1915                 for (TileIndex t = 0; t < MapSize(); t++) {
1916                         if (IsTileType(t, MP_RAILWAY) || IsLevelCrossingTile(t) || HasStationTileRail(t) ||
1917                                         (IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL)) {
1918                                 count[GetRailType(t)]++;
1919                         }
1920                 }
1921
1922                 rt = RAILTYPE_RAIL;
1923                 for (RailType r = RAILTYPE_ELECTRIC; r < RAILTYPE_END; r++) {
1924                         if (count[r] >= count[rt]) rt = r;
1925                 }
1926
1927                 /* No rail, just get the first available one */
1928                 if (count[rt] == 0) rt = DEF_RAILTYPE_FIRST;
1929         }
1930         switch (rt) {
1931                 case DEF_RAILTYPE_FIRST:
1932                         rt = RAILTYPE_RAIL;
1933                         while (rt < RAILTYPE_END && !HasRailtypeAvail(_local_company, rt)) rt++;
1934                         break;
1935
1936                 case DEF_RAILTYPE_LAST:
1937                         rt = GetBestRailtype(_local_company);
1938                         break;
1939
1940                 default:
1941                         break;
1942         }
1943
1944         _last_built_railtype = _cur_railtype = rt;
1945         BuildRailToolbarWindow *w = dynamic_cast<BuildRailToolbarWindow *>(FindWindowById(WC_BUILD_TOOLBAR, TRANSPORT_RAIL));
1946         if (w != nullptr) w->ModifyRailType(_cur_railtype);
1947 }
1948
1949 /**
1950  * Updates the current signal variant used in the signal GUI
1951  * to the one adequate to current year.
1952  * @param p needed to be called when a setting changes
1953  * @return success, needed for settings
1954  */
1955 bool ResetSignalVariant(int32 p)
1956 {
1957         SignalVariant new_variant = (_cur_year < _settings_client.gui.semaphore_build_before ? SIG_SEMAPHORE : SIG_ELECTRIC);
1958
1959         if (new_variant != _cur_signal_variant) {
1960                 Window *w = FindWindowById(WC_BUILD_SIGNAL, 0);
1961                 if (w != nullptr) {
1962                         w->SetDirty();
1963                         w->RaiseWidget((_cur_signal_variant == SIG_ELECTRIC ? WID_BS_ELECTRIC_NORM : WID_BS_SEMAPHORE_NORM) + _cur_signal_type);
1964                 }
1965                 _cur_signal_variant = new_variant;
1966         }
1967
1968         return true;
1969 }
1970
1971 /**
1972  * Resets the rail GUI - sets default railtype to build
1973  * and resets the signal GUI
1974  */
1975 void InitializeRailGUI()
1976 {
1977         SetDefaultRailGui();
1978
1979         _convert_signal_button = false;
1980         _cur_signal_type = _default_signal_type[_settings_client.gui.default_signal_type];
1981         ResetSignalVariant();
1982 }
1983
1984 /**
1985  * Create a drop down list for all the rail types of the local company.
1986  * @param for_replacement Whether this list is for the replacement window.
1987  * @param all_option Whether to add an 'all types' item.
1988  * @return The populated and sorted #DropDownList.
1989  */
1990 DropDownList GetRailTypeDropDownList(bool for_replacement, bool all_option)
1991 {
1992         RailTypes used_railtypes;
1993         RailTypes avail_railtypes;
1994
1995         const Company *c = Company::Get(_local_company);
1996
1997         /* Find the used railtypes. */
1998         if (for_replacement) {
1999                 avail_railtypes = GetCompanyRailtypes(c->index, false);
2000                 used_railtypes  = GetRailTypes(false);
2001         } else {
2002                 avail_railtypes = c->avail_railtypes;
2003                 used_railtypes  = GetRailTypes(true);
2004         }
2005
2006         DropDownList list;
2007
2008         if (all_option) {
2009                 list.emplace_back(new DropDownListStringItem(STR_REPLACE_ALL_RAILTYPE, INVALID_RAILTYPE, false));
2010         }
2011
2012         Dimension d = { 0, 0 };
2013         RailType rt;
2014         /* Get largest icon size, to ensure text is aligned on each menu item. */
2015         if (!for_replacement) {
2016                 FOR_ALL_SORTED_RAILTYPES(rt) {
2017                         if (!HasBit(used_railtypes, rt)) continue;
2018                         const RailtypeInfo *rti = GetRailTypeInfo(rt);
2019                         d = maxdim(d, GetSpriteSize(rti->gui_sprites.build_x_rail));
2020                 }
2021         }
2022
2023         FOR_ALL_SORTED_RAILTYPES(rt) {
2024                 /* If it's not used ever, don't show it to the user. */
2025                 if (!HasBit(used_railtypes, rt)) continue;
2026
2027                 const RailtypeInfo *rti = GetRailTypeInfo(rt);
2028
2029                 StringID str = for_replacement ? rti->strings.replace_text : (rti->max_speed > 0 ? STR_TOOLBAR_RAILTYPE_VELOCITY : STR_JUST_STRING);
2030                 DropDownListParamStringItem *item;
2031                 if (for_replacement) {
2032                         item = new DropDownListParamStringItem(str, rt, !HasBit(avail_railtypes, rt));
2033                 } else {
2034                         DropDownListIconItem *iconitem = new DropDownListIconItem(rti->gui_sprites.build_x_rail, PAL_NONE, str, rt, !HasBit(avail_railtypes, rt));
2035                         iconitem->SetDimension(d);
2036                         item = iconitem;
2037                 }
2038                 item->SetParam(0, rti->strings.menu_text);
2039                 item->SetParam(1, rti->max_speed);
2040                 list.emplace_back(item);
2041         }
2042         return list;
2043 }