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 "widgets/dropdown_type.h"
  26 #include "core/geometry_func.hpp"
  27 #include "hotkeys.h"
  28 #include "vehicle_func.h"
  29 #include "gui.h"
  30 #include "command_func.h"
  31 #include "airport_cmd.h"
  32 #include "station_cmd.h"
  33 #include "zoom_func.h"
  34 #include "timer/timer.h"
  35 #include "timer/timer_game_calendar.h"
  36
  37 #include "widgets/airport_widget.h"
  38
  39 #include "safeguards.h"
  40
  41
  42 static AirportClassID _selected_airport_class; ///< the currently visible airport class
  43 static int _selected_airport_index;            ///< the index of the selected airport in the current class or -1
  44 static byte _selected_airport_layout;          ///< selected airport layout number.
  45
  46 static void ShowBuildAirportPicker(Window *parent);
  47
  48 SpriteID GetCustomAirportSprite(const AirportSpec *as, byte layout);
  49
  50 void CcBuildAirport(Commands, const CommandCost &result, TileIndex tile)
  51 {
  52         if (result.Failed()) return;
  53
  54         if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_CONSTRUCTION_OTHER, tile);
  55         if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
  56 }
  57
  58 /**
  59  * Place an airport.
  60  * @param tile Position to put the new airport.
  61  */
  62 static void PlaceAirport(TileIndex tile)
  63 {
  64         if (_selected_airport_index == -1) return;
  65
  66         byte airport_type = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index)->GetIndex();
  67         byte layout = _selected_airport_layout;
  68         bool adjacent = _ctrl_pressed;
  69
  70         auto proc = [=](bool test, StationID to_join) -> bool {
  71                 if (test) {
  72                         return Command<CMD_BUILD_AIRPORT>::Do(CommandFlagsToDCFlags(GetCommandFlags<CMD_BUILD_AIRPORT>()), tile, airport_type, layout, INVALID_STATION, adjacent).Succeeded();
  73                 } else {
  74                         return Command<CMD_BUILD_AIRPORT>::Post(STR_ERROR_CAN_T_BUILD_AIRPORT_HERE, CcBuildAirport, tile, airport_type, layout, to_join, adjacent);
  75                 }
  76         };
  77
  78         ShowSelectStationIfNeeded(TileArea(tile, _thd.size.x / TILE_SIZE, _thd.size.y / TILE_SIZE), proc);
  79 }
  80
  81 /** Airport build toolbar window handler. */
  82 struct BuildAirToolbarWindow : Window {
  83         int last_user_action; // Last started user action.
  84
  85         BuildAirToolbarWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
  86         {
  87                 this->InitNested(window_number);
  88                 this->OnInvalidateData();
  89                 if (_settings_client.gui.link_terraform_toolbar) ShowTerraformToolbar(this);
  90                 this->last_user_action = INVALID_WID_AT;
  91         }
  92
  93         void Close([[maybe_unused]] int data = 0) override
  94         {
  95                 if (this->IsWidgetLowered(WID_AT_AIRPORT)) SetViewportCatchmentStation(nullptr, true);
  96                 if (_settings_client.gui.link_terraform_toolbar) CloseWindowById(WC_SCEN_LAND_GEN, 0, false);
  97                 this->Window::Close();
  98         }
  99
 100         /**
 101          * Some data on this window has become invalid.
 102          * @param data Information about the changed data.
 103          * @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.
 104          */
 105         void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 106         {
 107                 if (!gui_scope) return;
 108
 109                 bool can_build = CanBuildVehicleInfrastructure(VEH_AIRCRAFT);
 110                 this->SetWidgetDisabledState(WID_AT_AIRPORT, !can_build);
 111                 if (!can_build) {
 112                         CloseWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
 113
 114                         /* Show in the tooltip why this button is disabled. */
 115                         this->GetWidget<NWidgetCore>(WID_AT_AIRPORT)->SetToolTip(STR_TOOLBAR_DISABLED_NO_VEHICLE_AVAILABLE);
 116                 } else {
 117                         this->GetWidget<NWidgetCore>(WID_AT_AIRPORT)->SetToolTip(STR_TOOLBAR_AIRCRAFT_BUILD_AIRPORT_TOOLTIP);
 118                 }
 119         }
 120
 121         void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
 122         {
 123                 switch (widget) {
 124                         case WID_AT_AIRPORT:
 125                                 if (HandlePlacePushButton(this, WID_AT_AIRPORT, SPR_CURSOR_AIRPORT, HT_RECT)) {
 126                                         ShowBuildAirportPicker(this);
 127                                         this->last_user_action = widget;
 128                                 }
 129                                 break;
 130
 131                         case WID_AT_DEMOLISH:
 132                                 HandlePlacePushButton(this, WID_AT_DEMOLISH, ANIMCURSOR_DEMOLISH, HT_RECT | HT_DIAGONAL);
 133                                 this->last_user_action = widget;
 134                                 break;
 135
 136                         default: break;
 137                 }
 138         }
 139
 140
 141         void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 142         {
 143                 switch (this->last_user_action) {
 144                         case WID_AT_AIRPORT:
 145                                 PlaceAirport(tile);
 146                                 break;
 147
 148                         case WID_AT_DEMOLISH:
 149                                 PlaceProc_DemolishArea(tile);
 150                                 break;
 151
 152                         default: NOT_REACHED();
 153                 }
 154         }
 155
 156         void OnPlaceDrag(ViewportPlaceMethod select_method, [[maybe_unused]] ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt) override
 157         {
 158                 VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 159         }
 160
 161         void OnPlaceMouseUp([[maybe_unused]] ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt, TileIndex start_tile, TileIndex end_tile) override
 162         {
 163                 if (pt.x != -1 && select_proc == DDSP_DEMOLISH_AREA) {
 164                         GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
 165                 }
 166         }
 167
 168         void OnPlaceObjectAbort() override
 169         {
 170                 if (this->IsWidgetLowered(WID_AT_AIRPORT)) SetViewportCatchmentStation(nullptr, true);
 171
 172                 this->RaiseButtons();
 173
 174                 CloseWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
 175                 CloseWindowById(WC_SELECT_STATION, 0);
 176         }
 177
 178         /**
 179          * Handler for global hotkeys of the BuildAirToolbarWindow.
 180          * @param hotkey Hotkey
 181          * @return ES_HANDLED if hotkey was accepted.
 182          */
 183         static EventState AirportToolbarGlobalHotkeys(int hotkey)
 184         {
 185                 if (_game_mode != GM_NORMAL) return ES_NOT_HANDLED;
 186                 Window *w = ShowBuildAirToolbar();
 187                 if (w == nullptr) return ES_NOT_HANDLED;
 188                 return w->OnHotkey(hotkey);
 189         }
 190
 191         static inline HotkeyList hotkeys{"airtoolbar", {
 192                 Hotkey('1', "airport", WID_AT_AIRPORT),
 193                 Hotkey('2', "demolish", WID_AT_DEMOLISH),
 194         }, AirportToolbarGlobalHotkeys};
 195 };
 196
 197 static constexpr NWidgetPart _nested_air_toolbar_widgets[] = {
 198         NWidget(NWID_HORIZONTAL),
 199                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 200                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_TOOLBAR_AIRCRAFT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 201                 NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
 202         EndContainer(),
 203         NWidget(NWID_HORIZONTAL),
 204                 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),
 205                 NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetMinimalSize(4, 22), SetFill(1, 1), EndContainer(),
 206                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_AT_DEMOLISH), SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
 207         EndContainer(),
 208 };
 209
 210 static WindowDesc _air_toolbar_desc(__FILE__, __LINE__,
 211         WDP_ALIGN_TOOLBAR, "toolbar_air", 0, 0,
 212         WC_BUILD_TOOLBAR, WC_NONE,
 213         WDF_CONSTRUCTION,
 214         std::begin(_nested_air_toolbar_widgets), std::end(_nested_air_toolbar_widgets),
 215         &BuildAirToolbarWindow::hotkeys
 216 );
 217
 218 /**
 219  * Open the build airport toolbar window
 220  *
 221  * If the terraform toolbar is linked to the toolbar, that window is also opened.
 222  *
 223  * @return newly opened airport toolbar, or nullptr if the toolbar could not be opened.
 224  */
 225 Window *ShowBuildAirToolbar()
 226 {
 227         if (!Company::IsValidID(_local_company)) return nullptr;
 228
 229         CloseWindowByClass(WC_BUILD_TOOLBAR);
 230         return AllocateWindowDescFront<BuildAirToolbarWindow>(&_air_toolbar_desc, TRANSPORT_AIR);
 231 }
 232
 233 class BuildAirportWindow : public PickerWindowBase {
 234         SpriteID preview_sprite; ///< Cached airport preview sprite.
 235         int line_height;
 236         Scrollbar *vscroll;
 237
 238         /** Build a dropdown list of available airport classes */
 239         static DropDownList BuildAirportClassDropDown()
 240         {
 241                 DropDownList list;
 242
 243                 for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
 244                         list.push_back(std::make_unique<DropDownListStringItem>(AirportClass::Get((AirportClassID)i)->name, i, false));
 245                 }
 246
 247                 return list;
 248         }
 249
 250 public:
 251         BuildAirportWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
 252         {
 253                 this->CreateNestedTree();
 254
 255                 this->vscroll = this->GetScrollbar(WID_AP_SCROLLBAR);
 256                 this->vscroll->SetCapacity(5);
 257                 this->vscroll->SetPosition(0);
 258
 259                 this->FinishInitNested(TRANSPORT_AIR);
 260
 261                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 262                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 263                 this->OnInvalidateData();
 264
 265                 /* Ensure airport class is valid (changing NewGRFs). */
 266                 _selected_airport_class = Clamp(_selected_airport_class, APC_BEGIN, (AirportClassID)(AirportClass::GetClassCount() - 1));
 267                 const AirportClass *ac = AirportClass::Get(_selected_airport_class);
 268                 this->vscroll->SetCount(ac->GetSpecCount());
 269
 270                 /* Ensure the airport index is valid for this class (changing NewGRFs). */
 271                 _selected_airport_index = Clamp(_selected_airport_index, -1, ac->GetSpecCount() - 1);
 272
 273                 /* Only when no valid airport was selected, we want to select the first airport. */
 274                 bool selectFirstAirport = true;
 275                 if (_selected_airport_index != -1) {
 276                         const AirportSpec *as = ac->GetSpec(_selected_airport_index);
 277                         if (as->IsAvailable()) {
 278                                 /* Ensure the airport layout is valid. */
 279                                 _selected_airport_layout = Clamp(_selected_airport_layout, 0, as->num_table - 1);
 280                                 selectFirstAirport = false;
 281                                 this->UpdateSelectSize();
 282                         }
 283                 }
 284
 285                 if (selectFirstAirport) this->SelectFirstAvailableAirport(true);
 286         }
 287
 288         void Close([[maybe_unused]] int data = 0) override
 289         {
 290                 CloseWindowById(WC_SELECT_STATION, 0);
 291                 this->PickerWindowBase::Close();
 292         }
 293
 294         void SetStringParameters(WidgetID widget) const override
 295         {
 296                 switch (widget) {
 297                         case WID_AP_CLASS_DROPDOWN:
 298                                 SetDParam(0, AirportClass::Get(_selected_airport_class)->name);
 299                                 break;
 300
 301                         case WID_AP_LAYOUT_NUM:
 302                                 SetDParam(0, STR_EMPTY);
 303                                 if (_selected_airport_index != -1) {
 304                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 305                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_LAYOUT_NAME);
 306                                         if (string != STR_UNDEFINED) {
 307                                                 SetDParam(0, string);
 308                                         } else if (as->num_table > 1) {
 309                                                 SetDParam(0, STR_STATION_BUILD_AIRPORT_LAYOUT_NAME);
 310                                                 SetDParam(1, _selected_airport_layout + 1);
 311                                         }
 312                                 }
 313                                 break;
 314
 315                         default: break;
 316                 }
 317         }
 318
 319         void UpdateWidgetSize(WidgetID widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 320         {
 321                 switch (widget) {
 322                         case WID_AP_CLASS_DROPDOWN: {
 323                                 Dimension d = {0, 0};
 324                                 for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
 325                                         d = maxdim(d, GetStringBoundingBox(AirportClass::Get((AirportClassID)i)->name));
 326                                 }
 327                                 d.width += padding.width;
 328                                 d.height += padding.height;
 329                                 *size = maxdim(*size, d);
 330                                 break;
 331                         }
 332
 333                         case WID_AP_AIRPORT_LIST: {
 334                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 335                                         const AirportSpec *as = AirportSpec::Get(i);
 336                                         if (!as->enabled) continue;
 337
 338                                         size->width = std::max(size->width, GetStringBoundingBox(as->name).width + padding.width);
 339                                 }
 340
 341                                 this->line_height = GetCharacterHeight(FS_NORMAL) + padding.height;
 342                                 size->height = 5 * this->line_height;
 343                                 break;
 344                         }
 345
 346                         case WID_AP_AIRPORT_SPRITE:
 347                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 348                                         const AirportSpec *as = AirportSpec::Get(i);
 349                                         if (!as->enabled) continue;
 350                                         for (byte layout = 0; layout < as->num_table; layout++) {
 351                                                 SpriteID sprite = GetCustomAirportSprite(as, layout);
 352                                                 if (sprite != 0) {
 353                                                         Dimension d = GetSpriteSize(sprite);
 354                                                         d.width += WidgetDimensions::scaled.framerect.Horizontal();
 355                                                         d.height += WidgetDimensions::scaled.framerect.Vertical();
 356                                                         *size = maxdim(d, *size);
 357                                                 }
 358                                         }
 359                                 }
 360                                 break;
 361
 362                         case WID_AP_EXTRA_TEXT:
 363                                 for (int i = NEW_AIRPORT_OFFSET; i < NUM_AIRPORTS; i++) {
 364                                         const AirportSpec *as = AirportSpec::Get(i);
 365                                         if (!as->enabled) continue;
 366                                         for (byte layout = 0; layout < as->num_table; layout++) {
 367                                                 StringID string = GetAirportTextCallback(as, layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 368                                                 if (string == STR_UNDEFINED) continue;
 369
 370                                                 Dimension d = GetStringMultiLineBoundingBox(string, *size);
 371                                                 *size = maxdim(d, *size);
 372                                         }
 373                                 }
 374                                 break;
 375
 376                         default: break;
 377                 }
 378         }
 379
 380         void DrawWidget(const Rect &r, WidgetID widget) const override
 381         {
 382                 switch (widget) {
 383                         case WID_AP_AIRPORT_LIST: {
 384                                 Rect row = r.WithHeight(this->line_height).Shrink(WidgetDimensions::scaled.bevel);
 385                                 Rect text = r.WithHeight(this->line_height).Shrink(WidgetDimensions::scaled.matrix);
 386                                 AirportClass *apclass = AirportClass::Get(_selected_airport_class);
 387                                 for (uint i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < apclass->GetSpecCount(); i++) {
 388                                         const AirportSpec *as = apclass->GetSpec(i);
 389                                         if (!as->IsAvailable()) {
 390                                                 GfxFillRect(row, PC_BLACK, FILLRECT_CHECKER);
 391                                         }
 392                                         DrawString(text, as->name, ((int)i == _selected_airport_index) ? TC_WHITE : TC_BLACK);
 393                                         row = row.Translate(0, this->line_height);
 394                                         text = text.Translate(0, this->line_height);
 395                                 }
 396                                 break;
 397                         }
 398
 399                         case WID_AP_AIRPORT_SPRITE:
 400                                 if (this->preview_sprite != 0) {
 401                                         Dimension d = GetSpriteSize(this->preview_sprite);
 402                                         DrawSprite(this->preview_sprite, COMPANY_SPRITE_COLOUR(_local_company), CenterBounds(r.left, r.right, d.width), CenterBounds(r.top, r.bottom, d.height));
 403                                 }
 404                                 break;
 405
 406                         case WID_AP_EXTRA_TEXT:
 407                                 if (_selected_airport_index != -1) {
 408                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 409                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 410                                         if (string != STR_UNDEFINED) {
 411                                                 DrawStringMultiLine(r.left, r.right, r.top, r.bottom, string, TC_BLACK);
 412                                         }
 413                                 }
 414                                 break;
 415                 }
 416         }
 417
 418         void OnPaint() override
 419         {
 420                 this->DrawWidgets();
 421
 422                 Rect r = this->GetWidget<NWidgetBase>(WID_AP_ACCEPTANCE)->GetCurrentRect();
 423                 int top = r.top;
 424
 425                 if (_selected_airport_index != -1) {
 426                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 427                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 428
 429                         /* only show the station (airport) noise, if the noise option is activated */
 430                         if (_settings_game.economy.station_noise_level) {
 431                                 /* show the noise of the selected airport */
 432                                 SetDParam(0, as->noise_level);
 433                                 DrawString(r.left, r.right, top, STR_STATION_BUILD_NOISE);
 434                                 top += GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal;
 435                         }
 436
 437                         if (_settings_game.economy.infrastructure_maintenance) {
 438                                 Money monthly = _price[PR_INFRASTRUCTURE_AIRPORT] * as->maintenance_cost >> 3;
 439                                 SetDParam(0, monthly * 12);
 440                                 DrawString(r.left, r.right, top, TimerGameEconomy::UsingWallclockUnits() ? STR_STATION_BUILD_INFRASTRUCTURE_COST_PERIOD : STR_STATION_BUILD_INFRASTRUCTURE_COST_YEAR);
 441                                 top += GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal;
 442                         }
 443
 444                         /* strings such as 'Size' and 'Coverage Area' */
 445                         top = DrawStationCoverageAreaText(r.left, r.right, top, SCT_ALL, rad, false) + WidgetDimensions::scaled.vsep_normal;
 446                         top = DrawStationCoverageAreaText(r.left, r.right, top, SCT_ALL, rad, true);
 447                 }
 448
 449                 /* Resize background if the window is too small.
 450                  * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
 451                  * (This is the case, if making the window bigger moves the mouse into the window.) */
 452                 if (top > r.bottom) {
 453                         ResizeWindow(this, 0, top - r.bottom, false);
 454                 }
 455         }
 456
 457         void SelectOtherAirport(int airport_index)
 458         {
 459                 _selected_airport_index = airport_index;
 460                 _selected_airport_layout = 0;
 461
 462                 this->UpdateSelectSize();
 463                 this->SetDirty();
 464         }
 465
 466         void UpdateSelectSize()
 467         {
 468                 if (_selected_airport_index == -1) {
 469                         SetTileSelectSize(1, 1);
 470                         this->DisableWidget(WID_AP_LAYOUT_DECREASE);
 471                         this->DisableWidget(WID_AP_LAYOUT_INCREASE);
 472                 } else {
 473                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 474                         int w = as->size_x;
 475                         int h = as->size_y;
 476                         Direction rotation = as->rotation[_selected_airport_layout];
 477                         if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
 478                         SetTileSelectSize(w, h);
 479
 480                         this->preview_sprite = GetCustomAirportSprite(as, _selected_airport_layout);
 481
 482                         this->SetWidgetDisabledState(WID_AP_LAYOUT_DECREASE, _selected_airport_layout == 0);
 483                         this->SetWidgetDisabledState(WID_AP_LAYOUT_INCREASE, _selected_airport_layout + 1 >= as->num_table);
 484
 485                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 486                         if (_settings_client.gui.station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
 487                 }
 488         }
 489
 490         void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
 491         {
 492                 switch (widget) {
 493                         case WID_AP_CLASS_DROPDOWN:
 494                                 ShowDropDownList(this, BuildAirportClassDropDown(), _selected_airport_class, WID_AP_CLASS_DROPDOWN);
 495                                 break;
 496
 497                         case WID_AP_AIRPORT_LIST: {
 498                                 int num_clicked = this->vscroll->GetScrolledRowFromWidget(pt.y, this, widget, 0, this->line_height);
 499                                 if (num_clicked == INT_MAX) break;
 500                                 const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(num_clicked);
 501                                 if (as->IsAvailable()) this->SelectOtherAirport(num_clicked);
 502                                 break;
 503                         }
 504
 505                         case WID_AP_BTN_DONTHILIGHT: case WID_AP_BTN_DOHILIGHT:
 506                                 _settings_client.gui.station_show_coverage = (widget != WID_AP_BTN_DONTHILIGHT);
 507                                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 508                                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 509                                 this->SetDirty();
 510                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
 511                                 this->UpdateSelectSize();
 512                                 SetViewportCatchmentStation(nullptr, true);
 513                                 break;
 514
 515                         case WID_AP_LAYOUT_DECREASE:
 516                                 _selected_airport_layout--;
 517                                 this->UpdateSelectSize();
 518                                 this->SetDirty();
 519                                 break;
 520
 521                         case WID_AP_LAYOUT_INCREASE:
 522                                 _selected_airport_layout++;
 523                                 this->UpdateSelectSize();
 524                                 this->SetDirty();
 525                                 break;
 526                 }
 527         }
 528
 529         /**
 530          * Select the first available airport.
 531          * @param change_class If true, change the class if no airport in the current
 532          *   class is available.
 533          */
 534         void SelectFirstAvailableAirport(bool change_class)
 535         {
 536                 /* First try to select an airport in the selected class. */
 537                 AirportClass *sel_apclass = AirportClass::Get(_selected_airport_class);
 538                 for (uint i = 0; i < sel_apclass->GetSpecCount(); i++) {
 539                         const AirportSpec *as = sel_apclass->GetSpec(i);
 540                         if (as->IsAvailable()) {
 541                                 this->SelectOtherAirport(i);
 542                                 return;
 543                         }
 544                 }
 545                 if (change_class) {
 546                         /* If that fails, select the first available airport
 547                          * from the first class where airports are available. */
 548                         for (AirportClassID j = APC_BEGIN; j < APC_MAX; j++) {
 549                                 AirportClass *apclass = AirportClass::Get(j);
 550                                 for (uint i = 0; i < apclass->GetSpecCount(); i++) {
 551                                         const AirportSpec *as = apclass->GetSpec(i);
 552                                         if (as->IsAvailable()) {
 553                                                 _selected_airport_class = j;
 554                                                 this->vscroll->SetCount(apclass->GetSpecCount());
 555                                                 this->SelectOtherAirport(i);
 556                                                 return;
 557                                         }
 558                                 }
 559                         }
 560                 }
 561                 /* If all airports are unavailable, select nothing. */
 562                 this->SelectOtherAirport(-1);
 563         }
 564
 565         void OnDropdownSelect(WidgetID widget, int index) override
 566         {
 567                 if (widget == WID_AP_CLASS_DROPDOWN) {
 568                         _selected_airport_class = (AirportClassID)index;
 569                         this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
 570                         this->SelectFirstAvailableAirport(false);
 571                 }
 572         }
 573
 574         void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 575         {
 576                 CheckRedrawStationCoverage(this);
 577         }
 578
 579         IntervalTimer<TimerGameCalendar> yearly_interval = {{TimerGameCalendar::YEAR, TimerGameCalendar::Priority::NONE}, [this](auto) {
 580                 this->InvalidateData();
 581         }};
 582 };
 583
 584 static constexpr NWidgetPart _nested_build_airport_widgets[] = {
 585         NWidget(NWID_HORIZONTAL),
 586                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 587                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 588         EndContainer(),
 589         NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
 590                 NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0), SetPadding(WidgetDimensions::unscaled.picker),
 591                         NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_picker, 0),
 592                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CLASS_LABEL, STR_NULL), SetFill(1, 0),
 593                                 NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_AP_CLASS_DROPDOWN), SetFill(1, 0), SetDataTip(STR_JUST_STRING, STR_STATION_BUILD_AIRPORT_TOOLTIP),
 594                                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_AIRPORT_SPRITE), SetFill(1, 0),
 595                                 NWidget(NWID_HORIZONTAL),
 596                                         NWidget(WWT_MATRIX, COLOUR_GREY, WID_AP_AIRPORT_LIST), SetFill(1, 0), SetMatrixDataTip(1, 5, STR_STATION_BUILD_AIRPORT_TOOLTIP), SetScrollbar(WID_AP_SCROLLBAR),
 597                                         NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_AP_SCROLLBAR),
 598                                 EndContainer(),
 599                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_ORIENTATION, STR_NULL), SetFill(1, 0),
 600                                 NWidget(NWID_HORIZONTAL),
 601                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_DECREASE), SetMinimalSize(12, 0), SetDataTip(AWV_DECREASE, STR_NULL),
 602                                         NWidget(WWT_LABEL, COLOUR_GREY, WID_AP_LAYOUT_NUM), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_JUST_STRING1, STR_NULL),
 603                                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_INCREASE), SetMinimalSize(12, 0), SetDataTip(AWV_INCREASE, STR_NULL),
 604                                 EndContainer(),
 605                                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_EXTRA_TEXT), SetFill(1, 0), SetMinimalSize(150, 0),
 606                                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_COVERAGE_AREA_TITLE, STR_NULL), SetFill(1, 0),
 607                                 NWidget(NWID_HORIZONTAL), SetPIP(14, 0, 14), SetPIPRatio(1, 0, 1),
 608                                         NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
 609                                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DONTHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 610                                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_OFF, STR_STATION_BUILD_COVERAGE_AREA_OFF_TOOLTIP),
 611                                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DOHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 612                                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_ON, STR_STATION_BUILD_COVERAGE_AREA_ON_TOOLTIP),
 613                                         EndContainer(),
 614                                 EndContainer(),
 615                         EndContainer(),
 616                         NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_ACCEPTANCE), SetResize(0, 1), SetFill(1, 0), SetMinimalTextLines(2, WidgetDimensions::unscaled.vsep_normal),
 617                 EndContainer(),
 618         EndContainer(),
 619 };
 620
 621 static WindowDesc _build_airport_desc(__FILE__, __LINE__,
 622         WDP_AUTO, nullptr, 0, 0,
 623         WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 624         WDF_CONSTRUCTION,
 625         std::begin(_nested_build_airport_widgets), std::end(_nested_build_airport_widgets)
 626 );
 627
 628 static void ShowBuildAirportPicker(Window *parent)
 629 {
 630         new BuildAirportWindow(&_build_airport_desc, parent);
 631 }
 632
 633 void InitializeAirportGui()
 634 {
 635         _selected_airport_class = APC_BEGIN;
 636         _selected_airport_index = -1;
 637 }