src/train_gui.cpp

   1 /* $Id: train_gui.cpp 25454 2013-06-24 18:39:19Z rubidium $ */
   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 train_gui.cpp GUI for trains. */
  11
  12 #include "stdafx.h"
  13 #include "window_gui.h"
  14 #include "command_func.h"
  15 #include "train.h"
  16 #include "strings_func.h"
  17 #include "vehicle_func.h"
  18 #include "zoom_func.h"
  19
  20 #include "table/strings.h"
  21
  22 #include "safeguards.h"
  23
  24 /**
  25  * Callback for building wagons.
  26  * @param result The result of the command.
  27  * @param tile   The tile the command was executed on.
  28  * @param p1 Additional data for the command (for the #CommandProc)
  29  * @param p2 Additional data for the command (for the #CommandProc)
  30  */
  31 void CcBuildWagon(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
  32 {
  33         if (result.Failed()) return;
  34
  35         /* find a locomotive in the depot. */
  36         const Vehicle *found = NULL;
  37         const Train *t;
  38         FOR_ALL_TRAINS(t) {
  39                 if (t->IsFrontEngine() && t->tile == tile && t->IsStoppedInDepot()) {
  40                         if (found != NULL) return; // must be exactly one.
  41                         found = t;
  42                 }
  43         }
  44
  45         /* if we found a loco, */
  46         if (found != NULL) {
  47                 found = found->Last();
  48                 /* put the new wagon at the end of the loco. */
  49                 DoCommandP(0, _new_vehicle_id, found->index, CMD_MOVE_RAIL_VEHICLE);
  50                 InvalidateWindowClassesData(WC_TRAINS_LIST, 0);
  51         }
  52 }
  53
  54 /**
  55  * Highlight the position where a rail vehicle is dragged over by drawing a light gray background.
  56  * @param px        The current x position to draw from.
  57  * @param max_width The maximum space available to draw.
  58  * @param selection Selected vehicle that is dragged.
  59  * @param chain     Whether a whole chain is dragged.
  60  * @return The width of the highlight mark.
  61  */
  62 static int HighlightDragPosition(int px, int max_width, VehicleID selection, bool chain)
  63 {
  64         bool rtl = _current_text_dir == TD_RTL;
  65
  66         assert(selection != INVALID_VEHICLE);
  67         int dragged_width = 0;
  68         for (Train *t = Train::Get(selection); t != NULL; t = chain ? t->Next() : (t->HasArticulatedPart() ? t->GetNextArticulatedPart() : NULL)) {
  69                 dragged_width += t->GetDisplayImageWidth(NULL);
  70         }
  71
  72         int drag_hlight_left = rtl ? max(px - dragged_width + 1, 0) : px;
  73         int drag_hlight_right = rtl ? px : min(px + dragged_width, max_width) - 1;
  74         int drag_hlight_width = max(drag_hlight_right - drag_hlight_left + 1, 0);
  75
  76         if (drag_hlight_width > 0) {
  77                 GfxFillRect(drag_hlight_left + WD_FRAMERECT_LEFT, WD_FRAMERECT_TOP + 1,
  78                                 drag_hlight_right - WD_FRAMERECT_RIGHT, ScaleGUITrad(13) - WD_FRAMERECT_BOTTOM, _colour_gradient[COLOUR_GREY][7]);
  79         }
  80
  81         return drag_hlight_width;
  82 }
  83
  84 /**
  85  * Draws an image of a whole train
  86  * @param v         Front vehicle
  87  * @param left      The minimum horizontal position
  88  * @param right     The maximum horizontal position
  89  * @param y         Vertical position to draw at
  90  * @param selection Selected vehicle to draw a frame around
  91  * @param skip      Number of pixels to skip at the front (for scrolling)
  92  * @param drag_dest The vehicle another one is dragged over, \c INVALID_VEHICLE if none.
  93  */
  94 void DrawTrainImage(const Train *v, int left, int right, int y, VehicleID selection, EngineImageType image_type, int skip, VehicleID drag_dest)
  95 {
  96         bool rtl = _current_text_dir == TD_RTL;
  97         Direction dir = rtl ? DIR_E : DIR_W;
  98
  99         DrawPixelInfo tmp_dpi, *old_dpi;
 100         /* Position of highlight box */
 101         int highlight_l = 0;
 102         int highlight_r = 0;
 103         int max_width = right - left + 1;
 104         int height = ScaleGUITrad(14);
 105
 106         if (!FillDrawPixelInfo(&tmp_dpi, left, y, max_width, height)) return;
 107
 108         old_dpi = _cur_dpi;
 109         _cur_dpi = &tmp_dpi;
 110
 111         int px = rtl ? max_width + skip : -skip;
 112         bool sel_articulated = false;
 113         bool dragging = (drag_dest != INVALID_VEHICLE);
 114         bool drag_at_end_of_train = (drag_dest == v->index); // Head index is used to mark dragging at end of train.
 115         for (; v != NULL && (rtl ? px > 0 : px < max_width); v = v->Next()) {
 116                 if (dragging && !drag_at_end_of_train && drag_dest == v->index) {
 117                         /* Highlight the drag-and-drop destination inside the train. */
 118                         int drag_hlight_width = HighlightDragPosition(px, max_width, selection, _cursor.vehchain);
 119                         px += rtl ? -drag_hlight_width : drag_hlight_width;
 120                 }
 121
 122                 Point offset;
 123                 int width = Train::From(v)->GetDisplayImageWidth(&offset);
 124
 125                 if (rtl ? px + width > 0 : px - width < max_width) {
 126                         PaletteID pal = (v->vehstatus & VS_CRASHED) ? PALETTE_CRASH : GetVehiclePalette(v);
 127                         VehicleSpriteSeq seq;
 128                         v->GetImage(dir, image_type, &seq);
 129                         seq.Draw(px + (rtl ? -offset.x : offset.x), height / 2 + offset.y, pal, (v->vehstatus & VS_CRASHED) != 0);
 130                 }
 131
 132                 if (!v->IsArticulatedPart()) sel_articulated = false;
 133
 134                 if (v->index == selection) {
 135                         /* Set the highlight position */
 136                         highlight_l = rtl ? px - width : px;
 137                         highlight_r = rtl ? px - 1 : px + width - 1;
 138                         sel_articulated = true;
 139                 } else if ((_cursor.vehchain && highlight_r != 0) || sel_articulated) {
 140                         if (rtl) {
 141                                 highlight_l -= width;
 142                         } else {
 143                                 highlight_r += width;
 144                         }
 145                 }
 146
 147                 px += rtl ? -width : width;
 148         }
 149
 150         if (dragging && drag_at_end_of_train) {
 151                 /* Highlight the drag-and-drop destination at the end of the train. */
 152                 HighlightDragPosition(px, max_width, selection, _cursor.vehchain);
 153         }
 154
 155         if (highlight_l != highlight_r) {
 156                 /* Draw the highlight. Now done after drawing all the engines, as
 157                  * the next engine after the highlight could overlap it. */
 158                 DrawFrameRect(highlight_l, 0, highlight_r, height - 1, COLOUR_WHITE, FR_BORDERONLY);
 159         }
 160
 161         _cur_dpi = old_dpi;
 162 }
 163
 164 /** Helper struct for the cargo details information */
 165 struct CargoSummaryItem {
 166         CargoID cargo;    ///< The cargo that is carried
 167         StringID subtype; ///< STR_EMPTY if none
 168         uint capacity;    ///< Amount that can be carried
 169         uint amount;      ///< Amount that is carried
 170         StationID source; ///< One of the source stations
 171
 172         /** Used by CargoSummary::Find() and similar functions */
 173         inline bool operator != (const CargoSummaryItem &other) const
 174         {
 175                 return this->cargo != other.cargo || this->subtype != other.subtype;
 176         }
 177 };
 178
 179 static const uint TRAIN_DETAILS_MIN_INDENT = 32; ///< Minimum indent level in the train details window
 180 static const uint TRAIN_DETAILS_MAX_INDENT = 72; ///< Maximum indent level in the train details window; wider than this and we start on a new line
 181
 182 /** Container for the cargo summary information. */
 183 typedef SmallVector<CargoSummaryItem, 2> CargoSummary;
 184 /** Reused container of cargo details */
 185 static CargoSummary _cargo_summary;
 186
 187 /**
 188  * Draw the details cargo tab for the given vehicle at the given position
 189  *
 190  * @param item  Data to draw
 191  * @param left  The left most coordinate to draw
 192  * @param right The right most coordinate to draw
 193  * @param y     The y coordinate
 194  */
 195 static void TrainDetailsCargoTab(const CargoSummaryItem *item, int left, int right, int y)
 196 {
 197         StringID str;
 198         if (item->amount > 0) {
 199                 SetDParam(0, item->cargo);
 200                 SetDParam(1, item->amount);
 201                 SetDParam(2, item->source);
 202                 SetDParam(3, _settings_game.vehicle.freight_trains);
 203                 str = FreightWagonMult(item->cargo) > 1 ? STR_VEHICLE_DETAILS_CARGO_FROM_MULT : STR_VEHICLE_DETAILS_CARGO_FROM;
 204         } else {
 205                 SetDParam(0, STR_QUANTITY_N_A);
 206                 str = item->cargo == INVALID_CARGO ? STR_LTBLUE_STRING : STR_VEHICLE_DETAILS_CARGO_EMPTY;
 207         }
 208
 209         DrawString(left, right, y, str);
 210 }
 211
 212 /**
 213  * Draw the details info tab for the given vehicle at the given position
 214  *
 215  * @param v     current vehicle
 216  * @param left  The left most coordinate to draw
 217  * @param right The right most coordinate to draw
 218  * @param y     The y coordinate
 219  */
 220 static void TrainDetailsInfoTab(const Vehicle *v, int left, int right, int y)
 221 {
 222         if (RailVehInfo(v->engine_type)->railveh_type == RAILVEH_WAGON) {
 223                 SetDParam(0, v->engine_type);
 224                 SetDParam(1, v->value);
 225                 SetDParam(2, Train::From(v)->GetEmptyWeight());
 226                 SetDParam(3, Train::From(v)->GetLoadedWeight());
 227                 SetDParam(4, CeilDiv(Train::From(v)->gcache.cached_veh_length * 100, TILE_SIZE));
 228                 SetDParam(5, 2);
 229                 DrawString(left, right, y, STR_VEHICLE_DETAILS_TRAIN_WAGON_VALUE_EXT);
 230         } else {
 231                 SetDParam(0, v->engine_type);
 232                 SetDParam(1, v->build_year);
 233                 SetDParam(2, v->value);
 234                 SetDParam(3, Train::From(v)->GetEmptyWeight());
 235                 SetDParam(4, Train::From(v)->GetLoadedWeight());
 236
 237                 const Vehicle* u = v;
 238                 uint16 length = 0;
 239
 240                 do {
 241                         length += CeilDiv(Train::From(u)->gcache.cached_veh_length * 100, TILE_SIZE);
 242                 } while ((u = u->Next()) != NULL && u->IsArticulatedPart());
 243
 244                 SetDParam(5, length);
 245                 SetDParam(6, 2);
 246                 DrawString(left, right, y, STR_VEHICLE_DETAILS_TRAIN_ENGINE_BUILT_AND_VALUE_EXT);
 247         }
 248 }
 249
 250 /**
 251  * Draw the details capacity tab for the given vehicle at the given position
 252  *
 253  * @param item  Data to draw
 254  * @param left  The left most coordinate to draw
 255  * @param right The right most coordinate to draw
 256  * @param y     The y coordinate
 257  */
 258 static void TrainDetailsCapacityTab(const CargoSummaryItem *item, int left, int right, int y)
 259 {
 260         StringID str;
 261         if (item->cargo != INVALID_CARGO) {
 262                 SetDParam(0, item->cargo);
 263                 SetDParam(1, item->capacity);
 264                 SetDParam(4, item->subtype);
 265                 SetDParam(5, _settings_game.vehicle.freight_trains);
 266                 str = FreightWagonMult(item->cargo) > 1 ? STR_VEHICLE_INFO_CAPACITY_MULT : STR_VEHICLE_INFO_CAPACITY;
 267         } else {
 268                 /* Draw subtype only */
 269                 SetDParam(0, item->subtype);
 270                 str = STR_VEHICLE_INFO_NO_CAPACITY;
 271         }
 272         DrawString(left, right, y, str);
 273 }
 274
 275 /**
 276  * Collects the cargo transported
 277  * @param v Vehicle to process
 278  * @param summary Space for the result
 279  */
 280 static void GetCargoSummaryOfArticulatedVehicle(const Train *v, CargoSummary *summary)
 281 {
 282         summary->Clear();
 283         do {
 284                 if (!v->GetEngine()->CanCarryCargo()) continue;
 285
 286                 CargoSummaryItem new_item;
 287                 new_item.cargo = v->cargo_cap > 0 ? v->cargo_type : INVALID_CARGO;
 288                 new_item.subtype = GetCargoSubtypeText(v);
 289                 if (new_item.cargo == INVALID_CARGO && new_item.subtype == STR_EMPTY) continue;
 290
 291                 CargoSummaryItem *item = summary->Find(new_item);
 292                 if (item == summary->End()) {
 293                         item = summary->Append();
 294                         item->cargo = new_item.cargo;
 295                         item->subtype = new_item.subtype;
 296                         item->capacity = 0;
 297                         item->amount = 0;
 298                         item->source = INVALID_STATION;
 299                 }
 300
 301                 item->capacity += v->cargo_cap;
 302                 item->amount += v->cargo.StoredCount();
 303                 if (item->source == INVALID_STATION) item->source = v->cargo.Source();
 304         } while ((v = v->Next()) != NULL && v->IsArticulatedPart());
 305 }
 306
 307 /**
 308  * Get the length of an articulated vehicle.
 309  * @param v the vehicle to get the length of.
 310  * @return the length in pixels.
 311  */
 312 static uint GetLengthOfArticulatedVehicle(const Train *v)
 313 {
 314         uint length = 0;
 315
 316         do {
 317                 length += v->GetDisplayImageWidth();
 318         } while ((v = v->Next()) != NULL && v->IsArticulatedPart());
 319
 320         return length;
 321 }
 322
 323 /**
 324  * Determines the number of lines in the train details window
 325  * @param veh_id Train
 326  * @param det_tab Selected details tab
 327  * @return Number of line
 328  */
 329 int GetTrainDetailsWndVScroll(VehicleID veh_id, TrainDetailsWindowTabs det_tab)
 330 {
 331         int num = 0;
 332
 333         if (det_tab == TDW_TAB_TOTALS) { // Total cargo tab
 334                 CargoArray act_cargo;
 335                 CargoArray max_cargo;
 336                 for (const Vehicle *v = Vehicle::Get(veh_id); v != NULL; v = v->Next()) {
 337                         act_cargo[v->cargo_type] += v->cargo.StoredCount();
 338                         max_cargo[v->cargo_type] += v->cargo_cap;
 339                 }
 340
 341                 /* Set scroll-amount separately from counting, as to not compute num double
 342                  * for more carriages of the same type
 343                  */
 344                 for (CargoID i = 0; i < NUM_CARGO; i++) {
 345                         if (max_cargo[i] > 0) num++; // only count carriages that the train has
 346                 }
 347                 num += 10; // needs seven more because first line is description string and we have the weight and speed info
 348         } else {
 349                 for (const Train *v = Train::Get(veh_id); v != NULL; v = v->GetNextVehicle()) {
 350                         GetCargoSummaryOfArticulatedVehicle(v, &_cargo_summary);
 351                         num += max(1u, _cargo_summary.Length());
 352
 353                         uint length = GetLengthOfArticulatedVehicle(v);
 354                         if (length > TRAIN_DETAILS_MAX_INDENT) num++;
 355                 }
 356         }
 357
 358         return num;
 359 }
 360
 361 /**
 362  * Draw the details for the given vehicle at the given position
 363  *
 364  * @param v     current vehicle
 365  * @param left  The left most coordinate to draw
 366  * @param right The right most coordinate to draw
 367  * @param y     The y coordinate
 368  * @param vscroll_pos Position of scrollbar
 369  * @param vscroll_cap Number of lines currently displayed
 370  * @param det_tab Selected details tab
 371  */
 372 void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_pos, uint16 vscroll_cap, TrainDetailsWindowTabs det_tab)
 373 {
 374         /* get rid of awkward offset */
 375         y -= WD_MATRIX_TOP;
 376
 377         int sprite_height = ScaleGUITrad(GetVehicleHeight(VEH_TRAIN));
 378         int line_height = max(sprite_height, WD_MATRIX_TOP + FONT_HEIGHT_NORMAL + WD_MATRIX_BOTTOM);
 379         int sprite_y_offset = line_height / 2;
 380         int text_y_offset = (line_height - FONT_HEIGHT_NORMAL) / 2;
 381
 382         /* draw the first 3 details tabs */
 383         if (det_tab != TDW_TAB_TOTALS) {
 384                 bool rtl = _current_text_dir == TD_RTL;
 385                 Direction dir = rtl ? DIR_E : DIR_W;
 386                 int x = rtl ? right : left;
 387                 for (; v != NULL && vscroll_pos > -vscroll_cap; v = v->GetNextVehicle()) {
 388                         GetCargoSummaryOfArticulatedVehicle(v, &_cargo_summary);
 389
 390                         /* Draw sprites */
 391                         uint dx = 0;
 392                         int px = x;
 393                         const Train *u = v;
 394                         do {
 395                                 Point offset;
 396                                 int width = u->GetDisplayImageWidth(&offset);
 397                                 if (vscroll_pos <= 0 && vscroll_pos > -vscroll_cap) {
 398                                         int pitch = 0;
 399                                         const Engine *e = Engine::Get(v->engine_type);
 400                                         if (e->GetGRF() != NULL) {
 401                                                 pitch = ScaleGUITrad(e->GetGRF()->traininfo_vehicle_pitch);
 402                                         }
 403                                         PaletteID pal = (v->vehstatus & VS_CRASHED) ? PALETTE_CRASH : GetVehiclePalette(v);
 404                                         VehicleSpriteSeq seq;
 405                                         u->GetImage(dir, EIT_IN_DETAILS, &seq);
 406                                         seq.Draw(px + (rtl ? -offset.x : offset.x), y - line_height * vscroll_pos + sprite_y_offset + pitch, pal, (v->vehstatus & VS_CRASHED) != 0);
 407                                 }
 408                                 px += rtl ? -width : width;
 409                                 dx += width;
 410                                 u = u->Next();
 411                         } while (u != NULL && u->IsArticulatedPart());
 412
 413                         bool separate_sprite_row = (dx > (uint)ScaleGUITrad(TRAIN_DETAILS_MAX_INDENT));
 414                         if (separate_sprite_row) {
 415                                 vscroll_pos--;
 416                                 dx = 0;
 417                         }
 418
 419                         uint num_lines = max(1u, _cargo_summary.Length());
 420                         for (uint i = 0; i < num_lines; i++) {
 421                                 int sprite_width = max<int>(dx, ScaleGUITrad(TRAIN_DETAILS_MIN_INDENT)) + 3;
 422                                 int data_left  = left + (rtl ? 0 : sprite_width);
 423                                 int data_right = right - (rtl ? sprite_width : 0);
 424                                 if (vscroll_pos <= 0 && vscroll_pos > -vscroll_cap) {
 425                                         int py = y - line_height * vscroll_pos + text_y_offset;
 426                                         if (i > 0 || separate_sprite_row) {
 427                                                 if (vscroll_pos != 0) GfxFillRect(left, py - WD_MATRIX_TOP - 1, right, py - WD_MATRIX_TOP, _colour_gradient[COLOUR_GREY][5]);
 428                                         }
 429                                         switch (det_tab) {
 430                                                 case TDW_TAB_CARGO:
 431                                                         if (i < _cargo_summary.Length()) {
 432                                                                 TrainDetailsCargoTab(&_cargo_summary[i], data_left, data_right, py);
 433                                                         } else {
 434                                                                 DrawString(data_left, data_right, py, STR_QUANTITY_N_A, TC_LIGHT_BLUE);
 435                                                         }
 436                                                         break;
 437
 438                                                 case TDW_TAB_INFO:
 439                                                         if (i == 0) TrainDetailsInfoTab(v, data_left, data_right, py);
 440                                                         break;
 441
 442                                                 case TDW_TAB_CAPACITY:
 443                                                         if (i < _cargo_summary.Length()) {
 444                                                                 TrainDetailsCapacityTab(&_cargo_summary[i], data_left, data_right, py);
 445                                                         } else {
 446                                                                 SetDParam(0, STR_EMPTY);
 447                                                                 DrawString(data_left, data_right, py, STR_VEHICLE_INFO_NO_CAPACITY);
 448                                                         }
 449                                                         break;
 450
 451                                                 default: NOT_REACHED();
 452                                         }
 453                                 }
 454                                 vscroll_pos--;
 455                         }
 456                 }
 457         } else {
 458                 CargoArray act_cargo;
 459                 CargoArray max_cargo;
 460                 Money feeder_share = 0;
 461                 uint16 empty_weight = 0;
 462                 uint16 loaded_weight = 0;
 463                 uint16 empty_max_speed = 0;
 464                 uint16 loaded_max_speed = 0;
 465
 466                 for (const Vehicle *u = v; u != NULL; u = u->Next()) {
 467                         act_cargo[u->cargo_type] += u->cargo.StoredCount();
 468                         max_cargo[u->cargo_type] += u->cargo_cap;
 469                         feeder_share             += u->cargo.FeederShare();
 470                         empty_weight             += Train::From(u)->GetEmptyWeight();
 471                         loaded_weight            += Train::From(u)->GetLoadedWeight();
 472                 }
 473
 474                 double tractive_effort_empty = empty_weight * v->GetRollingFriction();
 475                 double tractive_effort_loaded = loaded_weight * v->GetRollingFriction();
 476                 double power = v->gcache.cached_power * 746ll;
 477                 double max_te = v->gcache.cached_max_te;
 478                 empty_max_speed = min(v->GetDisplayMaxSpeed(), (tractive_effort_empty == 0 || tractive_effort_empty > max_te) ? 0 : (3.6 * (power / tractive_effort_empty)));
 479                 loaded_max_speed = min(v->GetDisplayMaxSpeed(), (tractive_effort_loaded == 0 || tractive_effort_loaded > max_te) ? 0 : (3.6 * (power / tractive_effort_loaded)));
 480
 481                 /* draw performance tab */
 482                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 483                         SetDParam(0, CeilDiv(Train::From(v)->gcache.cached_total_length * 100, TILE_SIZE));
 484                         SetDParam(1, 2);
 485                         DrawString(left, right, y + text_y_offset, STR_VEHICLE_DETAILS_TRAIN_TOTAL_LENGTH);
 486                         y += line_height;
 487                 }
 488
 489                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 490                         y += line_height;
 491                 }
 492
 493                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 494                         SetDParam(0, empty_weight);
 495                         DrawString(left, right, y + text_y_offset, STR_VEHICLE_DETAILS_TRAIN_TOTAL_EMPTY_WEIGHT);
 496                         y += line_height;
 497                 }
 498
 499                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 500                         SetDParam(0, loaded_weight);
 501                         DrawString(left, right, y + text_y_offset, STR_VEHICLE_DETAILS_TRAIN_TOTAL_LOADED_WEIGHT);
 502                         y += line_height;
 503                 }
 504
 505                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 506                         y += line_height;
 507                 }
 508
 509                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 510                         SetDParam(0, empty_max_speed);
 511                         DrawString(left, right, y + text_y_offset, empty_max_speed > 0 ? STR_VEHICLE_DETAILS_TRAIN_MAX_EMPTY_SPEED : STR_VEHICLE_DETAILS_TRAIN_MAX_EMPTY_SPEED_ZERO);
 512                         y += line_height;
 513                 }
 514
 515                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 516                         SetDParam(0, loaded_max_speed);
 517                         DrawString(left, right, y + text_y_offset, loaded_max_speed > 0 ? STR_VEHICLE_DETAILS_TRAIN_MAX_LOADED_SPEED : STR_VEHICLE_DETAILS_TRAIN_MAX_LOADED_SPEED_ZERO);
 518                         y += line_height;
 519                 }
 520
 521                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 522                         y += line_height;
 523                 }
 524
 525                 if (--vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 526                         DrawString(left, right, y + text_y_offset, STR_VEHICLE_DETAILS_TRAIN_TOTAL_CAPACITY_TEXT);
 527                         y += line_height;
 528                 }
 529
 530                 for (CargoID i = 0; i < NUM_CARGO; i++) {
 531                         if (max_cargo[i] > 0 && --vscroll_pos < 0 && vscroll_pos > -vscroll_cap) {
 532                                 SetDParam(0, i);            // {CARGO} #1
 533                                 SetDParam(1, act_cargo[i]); // {CARGO} #2
 534                                 SetDParam(2, i);            // {SHORTCARGO} #1
 535                                 SetDParam(3, max_cargo[i]); // {SHORTCARGO} #2
 536                                 SetDParam(4, _settings_game.vehicle.freight_trains);
 537                                 DrawString(left, right, y + text_y_offset, FreightWagonMult(i) > 1 ? STR_VEHICLE_DETAILS_TRAIN_TOTAL_CAPACITY_MULT : STR_VEHICLE_DETAILS_TRAIN_TOTAL_CAPACITY);
 538                                 y += line_height;
 539                         }
 540                 }
 541         }
 542 }