src/airport_gui.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file airport_gui.cpp The GUI for airports. */
   9
  10 #include "stdafx.h"
  11 #include "economy_func.h"
  12 #include "window_gui.h"
  13 #include "station_gui.h"
  14 #include "terraform_gui.h"
  15 #include "sound_func.h"
  16 #include "window_func.h"
  17 #include "strings_func.h"
  18 #include "viewport_func.h"
  19 #include "company_func.h"
  20 #include "tilehighlight_func.h"
  21 #include "company_base.h"
  22 #include "station_type.h"
  23 #include "newgrf_airport.h"
  24 #include "newgrf_callbacks.h"
  25 #include "dropdown_type.h"
  26 #include "dropdown_func.h"
  27 #include "core/geometry_func.hpp"
  28 #include "hotkeys.h"
  29 #include "vehicle_func.h"
  30 #include "gui.h"
  31 #include "command_func.h"
  32 #include "airport_cmd.h"
  33 #include "station_cmd.h"
  34 #include "zoom_func.h"
  35 #include "timer/timer.h"
  36 #include "timer/timer_game_calendar.h"
  37
  38 #include "widgets/airport_widget.h"
  39
  40 #include "safeguards.h"
  41
  42
  43 static AirportClassID _selected_airport_class; ///< the currently visible airport class
  44 static int _selected_airport_index;            ///< the index of the selected airport in the current class or -1
  45 static uint8_t _selected_airport_layout;          ///< selected airport layout number.
  46
  47 static void ShowBuildAirportPicker(Window *parent);
  48
  49 SpriteID GetCustomAirportSprite(const AirportSpec *as, uint8_t layout);
  50
  51 void CcBuildAirport(Commands, const CommandCost &result, TileIndex tile)
  52 {
  53         if (result.Failed()) return;
  54
  55         if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_CONSTRUCTION_OTHER, tile);
  56         if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
  57 }
  58
  59 /**
  60  * Place an airport.
  61  * @param tile Position to put the new airport.
  62  */
  63 static void PlaceAirport(TileIndex tile)
  64 {
  65         if (_selected_airport_index == -1) return;
  66
  67         uint8_t airport_type = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index)->GetIndex();
  68         uint8_t layout = _selected_airport_layout;
  69         bool adjacent = _ctrl_pressed;
  70
  71         auto proc = [=](bool test, StationID to_join) -> bool {
  72                 if (test) {
  73                         return Command<CMD_BUILD_AIRPORT>::Do(CommandFlagsToDCFlags(GetCommandFlags<CMD_BUILD_AIRPORT>()), tile, airport_type, layout, INVALID_STATION, adjacent).Succeeded();
  74                 } else {
  75                         return Command<CMD_BUILD_AIRPORT>::Post(STR_ERROR_CAN_T_BUILD_AIRPORT_HERE, CcBuildAirport, tile, airport_type, layout, to_join, adjacent);
  76                 }
  77         };
  78
  79         ShowSelectStationIfNeeded(TileArea(tile, _thd.size.x / TILE_SIZE, _thd.size.y / TILE_SIZE), proc);
  80 }
  81
  82 /** Airport build toolbar window handler. */
  83 struct BuildAirToolbarWindow : Window {
  84         int last_user_action; // Last started user action.
  85
  86         BuildAirToolbarWindow(WindowDesc &desc, WindowNumber window_number) : Window(desc)
  87         {
  88                 this->InitNested(window_number);
  89                 this->OnInvalidateData();
  90                 if (_settings_client.gui.link_terraform_toolbar) ShowTerraformToolbar(this);
  91                 this->last_user_action = INVALID_WID_AT;
  92         }
  93
  94         void Close([[maybe_unused]] int data = 0) override
  95         {
  96                 if (this->IsWidgetLowered(WID_AT_AIRPORT)) SetViewportCatchmentStation(nullptr, true);
  97                 if (_settings_client.gui.link_terraform_toolbar) CloseWindowById(WC_SCEN_LAND_GEN, 0, false);
  98                 this->Window::Close();
  99         }
 100
 101         /**
 102          * Some data on this window has become invalid.
 103          * @param data Information about the changed data.
 104          * @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.
 105          */
 106         void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 107         {
 108                 if (!gui_scope) return;
 109
 110                 bool can_build = CanBuildVehicleInfrastructure(VEH_AIRCRAFT);
 111                 this->SetWidgetDisabledState(WID_AT_AIRPORT, !can_build);
 112                 if (!can_build) {
 113                         CloseWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
 114
 115                         /* Show in the tooltip why this button is disabled. */
 116                         this->GetWidget<NWidgetCore>(WID_AT_AIRPORT)->SetToolTip(STR_TOOLBAR_DISABLED_NO_VEHICLE_AVAILABLE);
 117                 } else {
 118                         this->GetWidget<NWidgetCore>(WID_AT_AIRPORT)->SetToolTip(STR_TOOLBAR_AIRCRAFT_BUILD_AIRPORT_TOOLTIP);
 119                 }
 120         }
 121
 122         void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
 123         {
 124                 switch (widget) {
 125                         case WID_AT_AIRPORT:
 126                                 if (HandlePlacePushButton(this, WID_AT_AIRPORT, SPR_CURSOR_AIRPORT, HT_RECT)) {
 127                                         ShowBuildAirportPicker(this);
 128                                         this->last_user_action = widget;
 129                                 }
 130                                 break;
 131
 132                         case WID_AT_DEMOLISH:
 133                                 HandlePlacePushButton(this, WID_AT_DEMOLISH, ANIMCURSOR_DEMOLISH, HT_RECT | HT_DIAGONAL);
 134                                 this->last_user_action = widget;
 135                                 break;
 136
 137                         default: break;
 138                 }
 139         }
 140
 141
 142         void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 143         {
 144                 switch (this->last_user_action) {
 145                         case WID_AT_AIRPORT:
 146                                 PlaceAirport(tile);
 147                                 break;
 148
 149                         case WID_AT_DEMOLISH:
 150                                 PlaceProc_DemolishArea(tile);
 151                                 break;
 152
 153                         default: NOT_REACHED();
 154                 }
 155         }
 156
 157         void OnPlaceDrag(ViewportPlaceMethod select_method, [[maybe_unused]] ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt) override
 158         {
 159                 VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 160         }
 161
 162         void OnPlaceMouseUp([[maybe_unused]] ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt, TileIndex start_tile, TileIndex end_tile) override
 163         {
 164                 if (pt.x != -1 && select_proc == DDSP_DEMOLISH_AREA) {
 165                         GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
 166                 }
 167         }
 168
 169         void OnPlaceObjectAbort() override
 170         {
 171                 if (this->IsWidgetLowered(WID_AT_AIRPORT)) SetViewportCatchmentStation(nullptr, true);
 172
 173                 this->RaiseButtons();
 174
 175                 CloseWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
 176                 CloseWindowById(WC_SELECT_STATION, 0);
 177         }
 178
 179         /**
 180          * Handler for global hotkeys of the BuildAirToolbarWindow.
 181          * @param hotkey Hotkey
 182          * @return ES_HANDLED if hotkey was accepted.
 183          */
 184         static EventState AirportToolbarGlobalHotkeys(int hotkey)
 185         {
 186                 if (_game_mode != GM_NORMAL) return ES_NOT_HANDLED;
 187                 Window *w = ShowBuildAirToolbar();
 188                 if (w == nullptr) return ES_NOT_HANDLED;
 189                 return w->OnHotkey(hotkey);
 190         }
 191
 192         static inline HotkeyList hotkeys{"airtoolbar", {
 193                 Hotkey('1', "airport", WID_AT_AIRPORT),
 194                 Hotkey('2', "demolish", WID_AT_DEMOLISH),
 195         }, AirportToolbarGlobalHotkeys};
 196 };
 197
 198 static constexpr NWidgetPart _nested_air_toolbar_widgets[] = {
 199         NWidget(NWID_HORIZONTAL),
 200                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 201                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_TOOLBAR_AIRCRAFT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 202                 NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
 203         EndContainer(),
 204         NWidget(NWID_HORIZONTAL),
 205                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_AT_AIRPORT), SetFill(0, 1), SetMinimalSize(42, 22), SetDataTip(SPR_IMG_AIRPORT, STR_TOOLBAR_AIRCRAFT_BUILD_AIRPORT_TOOLTIP),
 206                 NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetMinimalSize(4, 22), SetFill(1, 1), EndContainer(),
 207                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_AT_DEMOLISH), SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
 208         EndContainer(),
 209 };
 210
 211 static WindowDesc _air_toolbar_desc(
 212         WDP_ALIGN_TOOLBAR, "toolbar_air", 0, 0,
 213         WC_BUILD_TOOLBAR, WC_NONE,
 214         WDF_CONSTRUCTION,
 215         _nested_air_toolbar_widgets,
 216         &BuildAirToolbarWindow::hotkeys
 217 );
 218
 219 /**
 220  * Open the build airport toolbar window
 221  *
 222  * If the terraform toolbar is linked to the toolbar, that window is also opened.
 223  *
 224  * @return newly opened airport toolbar, or nullptr if the toolbar could not be opened.
 225  */
 226 Window *ShowBuildAirToolbar()
 227 {
 228         if (!Company::IsValidID(_local_company)) return nullptr;
 229
 230         CloseWindowByClass(WC_BUILD_TOOLBAR);
 231         return AllocateWindowDescFront<BuildAirToolbarWindow>(_air_toolbar_desc, TRANSPORT_AIR);
 232 }
 233
 234 class BuildAirportWindow : public PickerWindowBase {
 235         SpriteID preview_sprite; ///< Cached airport preview sprite.
 236         int line_height;
 237         Scrollbar *vscroll;
 238
 239         /** Build a dropdown list of available airport classes */
 240         static DropDownList BuildAirportClassDropDown()
 241         {
 242                 DropDownList list;
 243
 244                 for (const auto &cls : AirportClass::Classes()) {
 245                         list.push_back(MakeDropDownListStringItem(cls.name, cls.Index()));
 246                 }
 247
 248                 return list;
 249         }
 250
 251 public:
 252         BuildAirportWindow(WindowDesc &desc, Window *parent) : PickerWindowBase(desc, parent)
 253         {
 254                 this->CreateNestedTree();
 255
 256                 this->vscroll = this->GetScrollbar(WID_AP_SCROLLBAR);
 257                 this->vscroll->SetCapacity(5);
 258                 this->vscroll->SetPosition(0);
 259
 260                 this->FinishInitNested(TRANSPORT_AIR);
 261
 262                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 263                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 264                 this->OnInvalidateData();
 265
 266                 /* Ensure airport class is valid (changing NewGRFs). */
 267                 _selected_airport_class = Clamp(_selected_airport_class, APC_BEGIN, (AirportClassID)(AirportClass::GetClassCount() - 1));
 268                 const AirportClass *ac = AirportClass::Get(_selected_airport_class);
 269                 this->vscroll->SetCount(ac->GetSpecCount());
 270
 271                 /* Ensure the airport index is valid for this class (changing NewGRFs). */
 272                 _selected_airport_index = Clamp(_selected_airport_index, -1, ac->GetSpecCount() - 1);
 273
 274                 /* Only when no valid airport was selected, we want to select the first airport. */
 275                 bool selectFirstAirport = true;
 276                 if (_selected_airport_index != -1) {
 277                         const AirportSpec *as = ac->GetSpec(_selected_airport_index);
 278                         if (as->IsAvailable()) {
 279                                 /* Ensure the airport layout is valid. */
 280                                 _selected_airport_layout = Clamp(_selected_airport_layout, 0, static_cast<uint8_t>(as->layouts.size() - 1));
 281                                 selectFirstAirport = false;
 282                                 this->UpdateSelectSize();
 283                         }
 284                 }
 285
 286                 if (selectFirstAirport) this->SelectFirstAvailableAirport(true);
 287         }
 288
 289         void Close([[maybe_unused]] int data = 0) override
 290         {
 291                 CloseWindowById(WC_SELECT_STATION, 0);
 292                 this->PickerWindowBase::Close();
 293         }
 294
 295         void SetStringParameters(WidgetID widget) const override
 296         {
 297                 switch (widget) {
 298                         case WID_AP_CLASS_DROPDOWN:
 299                                 SetDParam(0, AirportClass::Get(_selected_airport_class)->name);
 300                                 break;
 301
 302                         case WID_AP_LAYOUT_NUM:
 303                                 SetDParam(0, STR_EMPTY);
 304                                 if (_selected_airport_index != -1) {
 305                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 306                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_LAYOUT_NAME);
 307                                         if (string != STR_UNDEFINED) {
 308                                                 SetDParam(0, string);
 309                                         } else if (as->layouts.size() > 1) {
 310                                                 SetDParam(0, STR_STATION_BUILD_AIRPORT_LAYOUT_NAME);
 311                                                 SetDParam(1, _selected_airport_layout + 1);
 312                                         }
 313                                 }
 314                                 break;
 315
 316                         default: break;
 317                 }
 318         }
 319
 320         void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
 321         {
 322                 switch (widget) {
 323                         case WID_AP_CLASS_DROPDOWN: {
 324                                 Dimension d = {0, 0};
 325                                 for (const auto &cls : AirportClass::Classes()) {
 326                                         d = maxdim(d, GetStringBoundingBox(cls.name));
 327                                 }
 328                                 d.width += padding.width;
 329                                 d.height += padding.height;
 330                                 size = maxdim(size, d);
 331                                 break;
 332                         }
 333
 334                         case WID_AP_AIRPORT_LIST: {
 335                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 336                                         const AirportSpec *as = AirportSpec::Get(i);
 337                                         if (!as->enabled) continue;
 338
 339                                         size.width = std::max(size.width, GetStringBoundingBox(as->name).width + padding.width);
 340                                 }
 341
 342                                 this->line_height = GetCharacterHeight(FS_NORMAL) + padding.height;
 343                                 size.height = 5 * this->line_height;
 344                                 break;
 345                         }
 346
 347                         case WID_AP_AIRPORT_SPRITE:
 348                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 349                                         const AirportSpec *as = AirportSpec::Get(i);
 350                                         if (!as->enabled) continue;
 351                                         for (uint8_t layout = 0; layout < static_cast<uint8_t>(as->layouts.size()); layout++) {
 352                                                 SpriteID sprite = GetCustomAirportSprite(as, layout);
 353                                                 if (sprite != 0) {
 354                                                         Dimension d = GetSpriteSize(sprite);
 355                                                         d.width += WidgetDimensions::scaled.framerect.Horizontal();
 356                                                         d.height += WidgetDimensions::scaled.framerect.Vertical();
 357                                                         size = maxdim(d, size);
 358                                                 }
 359                                         }
 360                                 }
 361                                 break;
 362
 363                         case WID_AP_EXTRA_TEXT:
 364                                 for (int i = NEW_AIRPORT_OFFSET; i < NUM_AIRPORTS; i++) {
 365                                         const AirportSpec *as = AirportSpec::Get(i);
 366                                         if (!as->enabled) continue;
 367                                         for (uint8_t layout = 0; layout < static_cast<uint8_t>(as->layouts.size()); layout++) {
 368                                                 StringID string = GetAirportTextCallback(as, layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 369                                                 if (string == STR_UNDEFINED) continue;
 370
 371                                                 Dimension d = GetStringMultiLineBoundingBox(string, size);
 372                                                 size = maxdim(d, size);
 373                                         }
 374                                 }
 375                                 break;
 376
 377                         default: break;
 378                 }
 379         }
 380
 381         void DrawWidget(const Rect &r, WidgetID widget) const override
 382         {
 383                 switch (widget) {
 384                         case WID_AP_AIRPORT_LIST: {
 385                                 Rect row = r.WithHeight(this->line_height).Shrink(WidgetDimensions::scaled.bevel);
 386                                 Rect text = r.WithHeight(this->line_height).Shrink(WidgetDimensions::scaled.matrix);
 387                                 const auto specs = AirportClass::Get(_selected_airport_class)->Specs();
 388                                 auto [first, last] = this->vscroll->GetVisibleRangeIterators(specs);
 389                                 for (auto it = first; it != last; ++it) {
 390                                         const AirportSpec *as = *it;
 391                                         if (!as->IsAvailable()) {
 392                                                 GfxFillRect(row, PC_BLACK, FILLRECT_CHECKER);
 393                                         }
 394                                         DrawString(text, as->name, (static_cast<int>(as->index) == _selected_airport_index) ? TC_WHITE : TC_BLACK);
 395                                         row = row.Translate(0, this->line_height);
 396                                         text = text.Translate(0, this->line_height);
 397                                 }
 398                                 break;
 399                         }
 400
 401                         case WID_AP_AIRPORT_SPRITE:
 402                                 if (this->preview_sprite != 0) {
 403                                         Dimension d = GetSpriteSize(this->preview_sprite);
 404                                         DrawSprite(this->preview_sprite, COMPANY_SPRITE_COLOUR(_local_company), CenterBounds(r.left, r.right, d.width), CenterBounds(r.top, r.bottom, d.height));
 405                                 }
 406                                 break;
 407
 408                         case WID_AP_EXTRA_TEXT:
 409                                 if (_selected_airport_index != -1) {
 410                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 411                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 412                                         if (string != STR_UNDEFINED) {
 413                                                 DrawStringMultiLine(r.left, r.right, r.top, r.bottom, string, TC_BLACK);
 414                                         }
 415                                 }
 416                                 break;
 417                 }
 418         }
 419
 420         void OnPaint() override
 421         {
 422                 this->DrawWidgets();
 423
 424                 Rect r = this->GetWidget<NWidgetBase>(WID_AP_ACCEPTANCE)->GetCurrentRect();
 425                 int top = r.top;
 426
 427                 if (_selected_airport_index != -1) {
 428                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 429                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 430
 431                         /* only show the station (airport) noise, if the noise option is activated */
 432                         if (_settings_game.economy.station_noise_level) {
 433                                 /* show the noise of the selected airport */
 434                                 SetDParam(0, as->noise_level);
 435                                 DrawString(r.left, r.right, top, STR_STATION_BUILD_NOISE);
 436                                 top += GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal;
 437                         }
 438
 439                         if (_settings_game.economy.infrastructure_maintenance) {
 440                                 Money monthly = _price[PR_INFRASTRUCTURE_AIRPORT] * as->maintenance_cost >> 3;
 441                                 SetDParam(0, monthly * 12);
 442                                 DrawString(r.left, r.right, top, TimerGameEconomy::UsingWallclockUnits() ? STR_STATION_BUILD_INFRASTRUCTURE_COST_PERIOD : STR_STATION_BUILD_INFRASTRUCTURE_COST_YEAR);
 443                                 top += GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal;
 444                         }
 445
 446                         /* strings such as 'Size' and 'Coverage Area' */
 447                         top = DrawStationCoverageAreaText(r.left, r.right, top, SCT_ALL, rad, false) + WidgetDimensions::scaled.vsep_normal;
 448                         top = DrawStationCoverageAreaText(r.left, r.right, top, SCT_ALL, rad, true);
 449                 }
 450
 451                 /* Resize background if the window is too small.
 452                  * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
 453                  * (This is the case, if making the window bigger moves the mouse into the window.) */
 454                 if (top > r.bottom) {
 455                         ResizeWindow(this, 0, top - r.bottom, false);
 456                 }
 457         }
 458
 459         void SelectOtherAirport(int airport_index)
 460         {
 461                 _selected_airport_index = airport_index;
 462                 _selected_airport_layout = 0;
 463
 464                 this->UpdateSelectSize();
 465                 this->SetDirty();
 466         }
 467
 468         void UpdateSelectSize()
 469         {
 470                 if (_selected_airport_index == -1) {
 471                         SetTileSelectSize(1, 1);
 472                         this->DisableWidget(WID_AP_LAYOUT_DECREASE);
 473                         this->DisableWidget(WID_AP_LAYOUT_INCREASE);
 474                 } else {
 475                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 476                         int w = as->size_x;
 477                         int h = as->size_y;
 478                         Direction rotation = as->layouts[_selected_airport_layout].rotation;
 479                         if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
 480                         SetTileSelectSize(w, h);
 481
 482                         this->preview_sprite = GetCustomAirportSprite(as, _selected_airport_layout);
 483
 484                         this->SetWidgetDisabledState(WID_AP_LAYOUT_DECREASE, _selected_airport_layout == 0);
 485                         this->SetWidgetDisabledState(WID_AP_LAYOUT_INCREASE, _selected_airport_layout + 1U >= as->layouts.size());
 486
 487                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 488                         if (_settings_client.gui.station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
 489                 }
 490         }
 491
 492         void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
 493         {
 494                 switch (widget) {
 495                         case WID_AP_CLASS_DROPDOWN:
 496                                 ShowDropDownList(this, BuildAirportClassDropDown(), _selected_airport_class, WID_AP_CLASS_DROPDOWN);
 497                                 break;
 498
 499                         case WID_AP_AIRPORT_LIST: {
 500                                 int32_t num_clicked = this->vscroll->GetScrolledRowFromWidget(pt.y, this, widget, 0, this->line_height);
 501                                 if (num_clicked == INT32_MAX) break;
 502                                 const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(num_clicked);
 503                                 if (as->IsAvailable()) this->SelectOtherAirport(num_clicked);
 504                                 break;
 505                         }
 506
 507                         case WID_AP_BTN_DONTHILIGHT: case WID_AP_BTN_DOHILIGHT:
 508                                 _settings_client.gui.station_show_coverage = (widget != WID_AP_BTN_DONTHILIGHT);
 509                                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 510                                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 511                                 this->SetDirty();
 512                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
 513                                 this->UpdateSelectSize();
 514                                 SetViewportCatchmentStation(nullptr, true);
 515                                 break;
 516
 517                         case WID_AP_LAYOUT_DECREASE:
 518                                 _selected_airport_layout--;
 519                                 this->UpdateSelectSize();
 520                                 this->SetDirty();
 521                                 break;
 522
 523                         case WID_AP_LAYOUT_INCREASE:
 524                                 _selected_airport_layout++;
 525                                 this->UpdateSelectSize();
 526                                 this->SetDirty();
 527                                 break;
 528                 }
 529         }
 530
 531         /**
 532          * Select the first available airport.
 533          * @param change_class If true, change the class if no airport in the current
 534          *   class is available.
 535          */
 536         void SelectFirstAvailableAirport(bool change_class)
 537         {
 538                 /* First try to select an airport in the selected class. */
 539                 AirportClass *sel_apclass = AirportClass::Get(_selected_airport_class);
 540                 for (const AirportSpec *as : sel_apclass->Specs()) {
 541                         if (as->IsAvailable()) {
 542                                 this->SelectOtherAirport(as->index);
 543                                 return;
 544                         }
 545                 }
 546                 if (change_class) {
 547                         /* If that fails, select the first available airport
 548                          * from the first class where airports are available. */
 549                         for (const auto &cls : AirportClass::Classes()) {
 550                                 for (const auto &as : cls.Specs()) {
 551                                         if (as->IsAvailable()) {
 552                                                 _selected_airport_class = cls.Index();
 553                                                 this->vscroll->SetCount(cls.GetSpecCount());
 554                                                 this->SelectOtherAirport(as->index);
 555                                                 return;
 556                                         }
 557                                 }
 558                         }
 559                 }
 560                 /* If all airports are unavailable, select nothing. */
 561                 this->SelectOtherAirport(-1);
 562         }
 563
 564         void OnDropdownSelect(WidgetID widget, int index) override
 565         {
 566                 if (widget == WID_AP_CLASS_DROPDOWN) {
 567                         _selected_airport_class = (AirportClassID)index;
 568                         this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
 569                         this->SelectFirstAvailableAirport(false);
 570                 }
 571         }
 572
 573         void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 574         {
 575                 CheckRedrawStationCoverage(this);
 576         }
 577
 578         IntervalTimer<TimerGameCalendar> yearly_interval = {{TimerGameCalendar::YEAR, TimerGameCalendar::Priority::NONE}, [this](auto) {
 579                 this->InvalidateData();
 580         }};
 581 };
 582
 583 static constexpr NWidgetPart _nested_build_airport_widgets[] = {
 584         NWidget(NWID_HORIZONTAL),
 585                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 586                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 587         EndContainer(),
 588         NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
 589                 NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0), SetPadding(WidgetDimensions::unscaled.picker),
 590                         NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_picker, 0),
 591                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CLASS_LABEL, STR_NULL), SetFill(1, 0),
 592                                 NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_AP_CLASS_DROPDOWN), SetFill(1, 0), SetDataTip(STR_JUST_STRING, STR_STATION_BUILD_AIRPORT_TOOLTIP),
 593                                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_AIRPORT_SPRITE), SetFill(1, 0),
 594                                 NWidget(NWID_HORIZONTAL),
 595                                         NWidget(WWT_MATRIX, COLOUR_GREY, WID_AP_AIRPORT_LIST), SetFill(1, 0), SetMatrixDataTip(1, 5, STR_STATION_BUILD_AIRPORT_TOOLTIP), SetScrollbar(WID_AP_SCROLLBAR),
 596                                         NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_AP_SCROLLBAR),
 597                                 EndContainer(),
 598                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_ORIENTATION, STR_NULL), SetFill(1, 0),
 599                                 NWidget(NWID_HORIZONTAL),
 600                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_DECREASE), SetMinimalSize(12, 0), SetDataTip(AWV_DECREASE, STR_NULL),
 601                                         NWidget(WWT_LABEL, COLOUR_GREY, WID_AP_LAYOUT_NUM), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_JUST_STRING1, STR_NULL),
 602                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_INCREASE), SetMinimalSize(12, 0), SetDataTip(AWV_INCREASE, STR_NULL),
 603                                 EndContainer(),
 604                                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_EXTRA_TEXT), SetFill(1, 0), SetMinimalSize(150, 0),
 605                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_COVERAGE_AREA_TITLE, STR_NULL), SetFill(1, 0),
 606                                 NWidget(NWID_HORIZONTAL), SetPIP(14, 0, 14), SetPIPRatio(1, 0, 1),
 607                                         NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
 608                                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DONTHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 609                                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_OFF, STR_STATION_BUILD_COVERAGE_AREA_OFF_TOOLTIP),
 610                                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DOHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 611                                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_ON, STR_STATION_BUILD_COVERAGE_AREA_ON_TOOLTIP),
 612                                         EndContainer(),
 613                                 EndContainer(),
 614                         EndContainer(),
 615                         NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_ACCEPTANCE), SetResize(0, 1), SetFill(1, 0), SetMinimalTextLines(2, WidgetDimensions::unscaled.vsep_normal),
 616                 EndContainer(),
 617         EndContainer(),
 618 };
 619
 620 static WindowDesc _build_airport_desc(
 621         WDP_AUTO, nullptr, 0, 0,
 622         WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 623         WDF_CONSTRUCTION,
 624         _nested_build_airport_widgets
 625 );
 626
 627 static void ShowBuildAirportPicker(Window *parent)
 628 {
 629         new BuildAirportWindow(_build_airport_desc, parent);
 630 }
 631
 632 void InitializeAirportGui()
 633 {
 634         _selected_airport_class = APC_BEGIN;
 635         _selected_airport_index = -1;
 636 }