src/airport_gui.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file airport_gui.cpp The GUI for airports. */
  11
  12 #include "stdafx.h"
  13 #include "window_gui.h"
  14 #include "station_gui.h"
  15 #include "terraform_gui.h"
  16 #include "sound_func.h"
  17 #include "window_func.h"
  18 #include "strings_func.h"
  19 #include "viewport_func.h"
  20 #include "company_func.h"
  21 #include "tilehighlight_func.h"
  22 #include "company_base.h"
  23 #include "station_type.h"
  24 #include "newgrf_airport.h"
  25 #include "newgrf_callbacks.h"
  26 #include "widgets/dropdown_type.h"
  27 #include "core/geometry_func.hpp"
  28 #include "hotkeys.h"
  29 #include "vehicle_func.h"
  30 #include "gui.h"
  31
  32 #include "widgets/airport_widget.h"
  33
  34 #include "safeguards.h"
  35
  36
  37 static AirportClassID _selected_airport_class; ///< the currently visible airport class
  38 static int _selected_airport_index;            ///< the index of the selected airport in the current class or -1
  39 static byte _selected_airport_layout;          ///< selected airport layout number.
  40
  41 static void ShowBuildAirportPicker(Window *parent);
  42
  43 SpriteID GetCustomAirportSprite(const AirportSpec *as, byte layout);
  44
  45 void CcBuildAirport(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
  46 {
  47         if (result.Failed()) return;
  48
  49         if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_SPLAT_OTHER, tile);
  50         if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
  51 }
  52
  53 /**
  54  * Place an airport.
  55  * @param tile Position to put the new airport.
  56  */
  57 static void PlaceAirport(TileIndex tile)
  58 {
  59         if (_selected_airport_index == -1) return;
  60         uint32 p2 = _ctrl_pressed;
  61         SB(p2, 16, 16, INVALID_STATION); // no station to join
  62
  63         uint32 p1 = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index)->GetIndex();
  64         p1 |= _selected_airport_layout << 8;
  65         CommandContainer cmdcont = { tile, p1, p2, _selected_airport_class == AirportClassID::APC_SEA ? CMD_BUILD_SEAPLANE_AIRPORT | CMD_MSG(STR_ERROR_CAN_T_BUILD_SEA_AIRPORT_HERE) : CMD_BUILD_AIRPORT | CMD_MSG(STR_ERROR_CAN_T_BUILD_AIRPORT_HERE), CcBuildAirport, 0, "" };
  66         ShowSelectStationIfNeeded(cmdcont, TileArea(tile, _thd.size.x / TILE_SIZE, _thd.size.y / TILE_SIZE));
  67 }
  68
  69 /** Airport build toolbar window handler. */
  70 struct BuildAirToolbarWindow : Window {
  71         int last_user_action; // Last started user action.
  72
  73         BuildAirToolbarWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
  74         {
  75                 this->InitNested(window_number);
  76                 if (_settings_client.gui.link_terraform_toolbar) ShowTerraformToolbar(this);
  77                 this->last_user_action = WIDGET_LIST_END;
  78         }
  79
  80         ~BuildAirToolbarWindow()
  81         {
  82                 if (_settings_client.gui.link_terraform_toolbar) DeleteWindowById(WC_SCEN_LAND_GEN, 0, false);
  83         }
  84
  85         /**
  86          * Some data on this window has become invalid.
  87          * @param data Information about the changed data.
  88          * @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.
  89          */
  90         virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
  91         {
  92                 if (!gui_scope) return;
  93
  94                 if (!CanBuildVehicleInfrastructure(VEH_AIRCRAFT)) delete this;
  95         }
  96
  97         virtual void OnClick(Point pt, int widget, int click_count)
  98         {
  99                 switch (widget) {
 100                         case WID_AT_AIRPORT:
 101                                 if (HandlePlacePushButton(this, WID_AT_AIRPORT, SPR_CURSOR_AIRPORT, HT_RECT)) {
 102                                         ShowBuildAirportPicker(this);
 103                                         this->last_user_action = widget;
 104                                 }
 105                                 break;
 106
 107                         case WID_AT_DEMOLISH:
 108                                 HandlePlacePushButton(this, WID_AT_DEMOLISH, ANIMCURSOR_DEMOLISH, HT_RECT | HT_DIAGONAL);
 109                                 this->last_user_action = widget;
 110                                 break;
 111
 112                         default: break;
 113                 }
 114         }
 115
 116
 117         virtual void OnPlaceObject(Point pt, TileIndex tile)
 118         {
 119                 switch (this->last_user_action) {
 120                         case WID_AT_AIRPORT:
 121                                 PlaceAirport(tile);
 122                                 break;
 123
 124                         case WID_AT_DEMOLISH:
 125                                 PlaceProc_DemolishArea(tile);
 126                                 break;
 127
 128                         default: NOT_REACHED();
 129                 }
 130         }
 131
 132         virtual void OnPlaceDrag(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt)
 133         {
 134                 VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 135         }
 136
 137         virtual void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile)
 138         {
 139                 if (pt.x != -1 && select_proc == DDSP_DEMOLISH_AREA) {
 140                         GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
 141                 }
 142         }
 143
 144         virtual void OnPlaceObjectAbort()
 145         {
 146                 this->RaiseButtons();
 147
 148                 DeleteWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
 149                 DeleteWindowById(WC_SELECT_STATION, 0);
 150         }
 151
 152         static HotkeyList hotkeys;
 153 };
 154
 155 /**
 156  * Handler for global hotkeys of the BuildAirToolbarWindow.
 157  * @param hotkey Hotkey
 158  * @return ES_HANDLED if hotkey was accepted.
 159  */
 160 static EventState AirportToolbarGlobalHotkeys(int hotkey)
 161 {
 162         if (_game_mode != GM_NORMAL || !CanBuildVehicleInfrastructure(VEH_AIRCRAFT)) return ES_NOT_HANDLED;
 163         Window *w = ShowBuildAirToolbar();
 164         if (w == nullptr) return ES_NOT_HANDLED;
 165         return w->OnHotkey(hotkey);
 166 }
 167
 168 static Hotkey airtoolbar_hotkeys[] = {
 169         Hotkey('1', "airport", WID_AT_AIRPORT),
 170         Hotkey('2', "demolish", WID_AT_DEMOLISH),
 171         HOTKEY_LIST_END
 172 };
 173 HotkeyList BuildAirToolbarWindow::hotkeys("airtoolbar", airtoolbar_hotkeys, AirportToolbarGlobalHotkeys);
 174
 175 static const NWidgetPart _nested_air_toolbar_widgets[] = {
 176         NWidget(NWID_HORIZONTAL),
 177                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 178                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_TOOLBAR_AIRCRAFT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 179                 NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
 180         EndContainer(),
 181         NWidget(NWID_HORIZONTAL),
 182                 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),
 183                 NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetMinimalSize(4, 22), SetFill(1, 1), EndContainer(),
 184                 NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_AT_DEMOLISH), SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
 185         EndContainer(),
 186 };
 187
 188 static WindowDesc _air_toolbar_desc(
 189         WDP_ALIGN_TOOLBAR, "toolbar_air", 0, 0,
 190         WC_BUILD_TOOLBAR, WC_NONE,
 191         WDF_CONSTRUCTION,
 192         _nested_air_toolbar_widgets, lengthof(_nested_air_toolbar_widgets),
 193         &BuildAirToolbarWindow::hotkeys
 194 );
 195
 196 /**
 197  * Open the build airport toolbar window
 198  *
 199  * If the terraform toolbar is linked to the toolbar, that window is also opened.
 200  *
 201  * @return newly opened airport toolbar, or nullptr if the toolbar could not be opened.
 202  */
 203 Window *ShowBuildAirToolbar()
 204 {
 205         if (!Company::IsValidID(_local_company)) return nullptr;
 206
 207         DeleteWindowByClass(WC_BUILD_TOOLBAR);
 208         return AllocateWindowDescFront<BuildAirToolbarWindow>(&_air_toolbar_desc, TRANSPORT_AIR);
 209 }
 210
 211 class BuildAirportWindow : public PickerWindowBase {
 212         SpriteID preview_sprite; ///< Cached airport preview sprite.
 213         int line_height;
 214         Scrollbar *vscroll;
 215
 216         /** Build a dropdown list of available airport classes */
 217         static DropDownList *BuildAirportClassDropDown()
 218         {
 219                 DropDownList *list = new DropDownList();
 220
 221                 for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
 222                         *list->Append() = new DropDownListStringItem(AirportClass::Get((AirportClassID)i)->name, i, false);
 223                 }
 224
 225                 return list;
 226         }
 227
 228 public:
 229         BuildAirportWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
 230         {
 231                 this->CreateNestedTree();
 232
 233                 this->vscroll = this->GetScrollbar(WID_AP_SCROLLBAR);
 234                 this->vscroll->SetCapacity(5);
 235                 this->vscroll->SetPosition(0);
 236
 237                 this->FinishInitNested(TRANSPORT_AIR);
 238
 239                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 240                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 241                 this->OnInvalidateData();
 242
 243                 /* Ensure airport class is valid (changing NewGRFs). */
 244                 _selected_airport_class = Clamp(_selected_airport_class, APC_BEGIN, (AirportClassID)(AirportClass::GetClassCount() - 1));
 245                 const AirportClass *ac = AirportClass::Get(_selected_airport_class);
 246                 this->vscroll->SetCount(ac->GetSpecCount());
 247
 248                 /* Ensure the airport index is valid for this class (changing NewGRFs). */
 249                 _selected_airport_index = Clamp(_selected_airport_index, -1, ac->GetSpecCount() - 1);
 250
 251                 /* Only when no valid airport was selected, we want to select the first airport. */
 252                 bool selectFirstAirport = true;
 253                 if (_selected_airport_index != -1) {
 254                         const AirportSpec *as = ac->GetSpec(_selected_airport_index);
 255                         if (as->IsAvailable()) {
 256                                 /* Ensure the airport layout is valid. */
 257                                 _selected_airport_layout = Clamp(_selected_airport_layout, 0, as->num_table - 1);
 258                                 selectFirstAirport = false;
 259                                 this->UpdateSelectSize();
 260                         }
 261                 }
 262
 263                 if (selectFirstAirport) this->SelectFirstAvailableAirport(true);
 264         }
 265
 266         virtual ~BuildAirportWindow()
 267         {
 268                 DeleteWindowById(WC_SELECT_STATION, 0);
 269         }
 270
 271         virtual void SetStringParameters(int widget) const
 272         {
 273                 switch (widget) {
 274                         case WID_AP_CLASS_DROPDOWN:
 275                                 SetDParam(0, AirportClass::Get(_selected_airport_class)->name);
 276                                 break;
 277
 278                         case WID_AP_LAYOUT_NUM:
 279                                 SetDParam(0, STR_EMPTY);
 280                                 if (_selected_airport_index != -1) {
 281                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 282                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_LAYOUT_NAME);
 283                                         if (string != STR_UNDEFINED) {
 284                                                 SetDParam(0, string);
 285                                         } else if (as->num_table > 1) {
 286                                                 SetDParam(0, STR_STATION_BUILD_AIRPORT_LAYOUT_NAME);
 287                                                 SetDParam(1, _selected_airport_layout + 1);
 288                                         }
 289                                 }
 290                                 break;
 291
 292                         default: break;
 293                 }
 294         }
 295
 296         virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
 297         {
 298                 switch (widget) {
 299                         case WID_AP_CLASS_DROPDOWN: {
 300                                 Dimension d = {0, 0};
 301                                 for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
 302                                         SetDParam(0, AirportClass::Get((AirportClassID)i)->name);
 303                                         d = maxdim(d, GetStringBoundingBox(STR_BLACK_STRING));
 304                                 }
 305                                 d.width += padding.width;
 306                                 d.height += padding.height;
 307                                 *size = maxdim(*size, d);
 308                                 break;
 309                         }
 310
 311                         case WID_AP_AIRPORT_LIST: {
 312                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 313                                         const AirportSpec *as = AirportSpec::Get(i);
 314                                         if (!as->enabled) continue;
 315
 316                                         size->width = max(size->width, GetStringBoundingBox(as->name).width);
 317                                 }
 318
 319                                 this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
 320                                 size->height = 5 * this->line_height;
 321                                 break;
 322                         }
 323
 324                         case WID_AP_AIRPORT_SPRITE:
 325                                 for (int i = 0; i < NUM_AIRPORTS; i++) {
 326                                         const AirportSpec *as = AirportSpec::Get(i);
 327                                         if (!as->enabled) continue;
 328                                         for (byte layout = 0; layout < as->num_table; layout++) {
 329                                                 SpriteID sprite = GetCustomAirportSprite(as, layout);
 330                                                 if (sprite != 0) {
 331                                                         Dimension d = GetSpriteSize(sprite);
 332                                                         d.width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
 333                                                         d.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
 334                                                         *size = maxdim(d, *size);
 335                                                 }
 336                                         }
 337                                 }
 338                                 break;
 339
 340                         case WID_AP_EXTRA_TEXT:
 341                                 for (int i = NEW_AIRPORT_OFFSET; i < NUM_AIRPORTS; i++) {
 342                                         const AirportSpec *as = AirportSpec::Get(i);
 343                                         if (!as->enabled) continue;
 344                                         for (byte layout = 0; layout < as->num_table; layout++) {
 345                                                 StringID string = GetAirportTextCallback(as, layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 346                                                 if (string == STR_UNDEFINED) continue;
 347
 348                                                 /* STR_BLACK_STRING is used to start the string with {BLACK} */
 349                                                 SetDParam(0, string);
 350                                                 Dimension d = GetStringMultiLineBoundingBox(STR_BLACK_STRING, *size);
 351                                                 *size = maxdim(d, *size);
 352                                         }
 353                                 }
 354                                 break;
 355
 356                         default: break;
 357                 }
 358         }
 359
 360         virtual void DrawWidget(const Rect &r, int widget) const
 361         {
 362                 switch (widget) {
 363                         case WID_AP_AIRPORT_LIST: {
 364                                 int y = r.top;
 365                                 AirportClass *apclass = AirportClass::Get(_selected_airport_class);
 366                                 for (uint i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < apclass->GetSpecCount(); i++) {
 367                                         const AirportSpec *as = apclass->GetSpec(i);
 368                                         if (!as->IsAvailable()) {
 369                                                 GfxFillRect(r.left + 1, y + 1, r.right - 1, y + this->line_height - 2, PC_BLACK, FILLRECT_CHECKER);
 370                                         }
 371                                         DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_RIGHT, y + WD_MATRIX_TOP, as->name, ((int)i == _selected_airport_index) ? TC_WHITE : TC_BLACK);
 372                                         y += this->line_height;
 373                                 }
 374                                 break;
 375                         }
 376
 377                         case WID_AP_AIRPORT_SPRITE:
 378                                 if (this->preview_sprite != 0) {
 379                                         Dimension d = GetSpriteSize(this->preview_sprite);
 380                                         DrawSprite(this->preview_sprite, COMPANY_SPRITE_COLOUR(_local_company), (r.left + r.right - d.width) / 2, (r.top + r.bottom - d.height) / 2);
 381                                 }
 382                                 break;
 383
 384                         case WID_AP_EXTRA_TEXT:
 385                                 if (_selected_airport_index != -1) {
 386                                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 387                                         StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_ADDITIONAL_TEXT);
 388                                         if (string != STR_UNDEFINED) {
 389                                                 SetDParam(0, string);
 390                                                 DrawStringMultiLine(r.left, r.right, r.top, r.bottom, STR_BLACK_STRING);
 391                                         }
 392                                 }
 393                                 break;
 394                 }
 395         }
 396
 397         virtual void OnPaint()
 398         {
 399                 this->DrawWidgets();
 400
 401                 uint16 top = this->GetWidget<NWidgetBase>(WID_AP_BTN_DOHILIGHT)->pos_y + this->GetWidget<NWidgetBase>(WID_AP_BTN_DOHILIGHT)->current_y + WD_PAR_VSEP_NORMAL;
 402                 NWidgetBase *panel_nwi = this->GetWidget<NWidgetBase>(WID_AP_BOTTOMPANEL);
 403
 404                 int right = panel_nwi->pos_x +  panel_nwi->current_x;
 405                 int bottom = panel_nwi->pos_y +  panel_nwi->current_y;
 406
 407                 if (_selected_airport_index != -1) {
 408                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 409                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 410
 411                         /* only show the station (airport) noise, if the noise option is activated */
 412                         if (_settings_game.economy.station_noise_level) {
 413                                 /* show the noise of the selected airport */
 414                                 SetDParam(0, as->noise_level);
 415                                 DrawString(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, STR_STATION_BUILD_NOISE);
 416                                 top += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
 417                         }
 418
 419                         /* strings such as 'Size' and 'Coverage Area' */
 420                         top = DrawStationCoverageAreaText(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, SCT_ALL, rad, false) + WD_PAR_VSEP_NORMAL;
 421                         top = DrawStationCoverageAreaText(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, SCT_ALL, rad, true) + WD_PAR_VSEP_NORMAL;
 422                 }
 423
 424                 /* Resize background if the window is too small.
 425                  * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
 426                  * (This is the case, if making the window bigger moves the mouse into the window.) */
 427                 if (top > bottom) {
 428                         ResizeWindow(this, 0, top - bottom, false);
 429                 }
 430         }
 431
 432         void SelectOtherAirport(int airport_index)
 433         {
 434                 _selected_airport_index = airport_index;
 435                 _selected_airport_layout = 0;
 436
 437                 this->UpdateSelectSize();
 438                 this->SetDirty();
 439         }
 440
 441         void UpdateSelectSize()
 442         {
 443                 if (_selected_airport_index == -1) {
 444                         SetTileSelectSize(1, 1);
 445                         this->DisableWidget(WID_AP_LAYOUT_DECREASE);
 446                         this->DisableWidget(WID_AP_LAYOUT_INCREASE);
 447                 } else {
 448                         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
 449                         int w = as->size_x;
 450                         int h = as->size_y;
 451                         Direction rotation = as->rotation[_selected_airport_layout];
 452                         if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
 453                         SetTileSelectSize(w, h);
 454
 455                         this->preview_sprite = GetCustomAirportSprite(as, _selected_airport_layout);
 456
 457                         this->SetWidgetDisabledState(WID_AP_LAYOUT_DECREASE, _selected_airport_layout == 0);
 458                         this->SetWidgetDisabledState(WID_AP_LAYOUT_INCREASE, _selected_airport_layout + 1 >= as->num_table);
 459
 460                         int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
 461                         if (_settings_client.gui.station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
 462                 }
 463         }
 464
 465         virtual void OnClick(Point pt, int widget, int click_count)
 466         {
 467                 switch (widget) {
 468                         case WID_AP_CLASS_DROPDOWN:
 469                                 ShowDropDownList(this, BuildAirportClassDropDown(), _selected_airport_class, WID_AP_CLASS_DROPDOWN);
 470                                 break;
 471
 472                         case WID_AP_AIRPORT_LIST: {
 473                                 int num_clicked = this->vscroll->GetPosition() + (pt.y - this->nested_array[widget]->pos_y) / this->line_height;
 474                                 if (num_clicked >= this->vscroll->GetCount()) break;
 475                                 const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(num_clicked);
 476                                 if (as->IsAvailable()) this->SelectOtherAirport(num_clicked);
 477                                 break;
 478                         }
 479
 480                         case WID_AP_BTN_DONTHILIGHT: case WID_AP_BTN_DOHILIGHT:
 481                                 _settings_client.gui.station_show_coverage = (widget != WID_AP_BTN_DONTHILIGHT);
 482                                 this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
 483                                 this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
 484                                 this->SetDirty();
 485                                 if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
 486                                 this->UpdateSelectSize();
 487                                 break;
 488
 489                         case WID_AP_LAYOUT_DECREASE:
 490                                 _selected_airport_layout--;
 491                                 this->UpdateSelectSize();
 492                                 this->SetDirty();
 493                                 break;
 494
 495                         case WID_AP_LAYOUT_INCREASE:
 496                                 _selected_airport_layout++;
 497                                 this->UpdateSelectSize();
 498                                 this->SetDirty();
 499                                 break;
 500                 }
 501         }
 502
 503         /**
 504          * Select the first available airport.
 505          * @param change_class If true, change the class if no airport in the current
 506          *   class is available.
 507          */
 508         void SelectFirstAvailableAirport(bool change_class)
 509         {
 510                 /* First try to select an airport in the selected class. */
 511                 AirportClass *sel_apclass = AirportClass::Get(_selected_airport_class);
 512                 for (uint i = 0; i < sel_apclass->GetSpecCount(); i++) {
 513                         const AirportSpec *as = sel_apclass->GetSpec(i);
 514                         if (as->IsAvailable()) {
 515                                 this->SelectOtherAirport(i);
 516                                 return;
 517                         }
 518                 }
 519                 if (change_class) {
 520                         /* If that fails, select the first available airport
 521                          * from a random class. */
 522                         for (AirportClassID j = APC_BEGIN; j < APC_MAX; j++) {
 523                                 AirportClass *apclass = AirportClass::Get(j);
 524                                 for (uint i = 0; i < apclass->GetSpecCount(); i++) {
 525                                         const AirportSpec *as = apclass->GetSpec(i);
 526                                         if (as->IsAvailable()) {
 527                                                 _selected_airport_class = j;
 528                                                 this->SelectOtherAirport(i);
 529                                                 return;
 530                                         }
 531                                 }
 532                         }
 533                 }
 534                 /* If all airports are unavailable, select nothing. */
 535                 this->SelectOtherAirport(-1);
 536         }
 537
 538         virtual void OnDropdownSelect(int widget, int index)
 539         {
 540                 assert(widget == WID_AP_CLASS_DROPDOWN);
 541                 _selected_airport_class = (AirportClassID)index;
 542                 this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
 543                 this->SelectFirstAvailableAirport(false);
 544         }
 545
 546         virtual void OnTick()
 547         {
 548                 CheckRedrawStationCoverage(this);
 549         }
 550 };
 551
 552 static const NWidgetPart _nested_build_airport_widgets[] = {
 553         NWidget(NWID_HORIZONTAL),
 554                 NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
 555                 NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 556         EndContainer(),
 557         NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetFill(1, 0), SetPIP(2, 0, 2),
 558                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CLASS_LABEL, STR_NULL), SetFill(1, 0),
 559                 NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_AP_CLASS_DROPDOWN), SetFill(1, 0), SetDataTip(STR_BLACK_STRING, STR_STATION_BUILD_AIRPORT_TOOLTIP),
 560                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_AIRPORT_SPRITE), SetFill(1, 0),
 561                 NWidget(NWID_HORIZONTAL),
 562                         NWidget(WWT_MATRIX, COLOUR_GREY, WID_AP_AIRPORT_LIST), SetFill(1, 0), SetMatrixDataTip(1, 5, STR_STATION_BUILD_AIRPORT_TOOLTIP), SetScrollbar(WID_AP_SCROLLBAR),
 563                         NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_AP_SCROLLBAR),
 564                 EndContainer(),
 565                 NWidget(NWID_HORIZONTAL),
 566                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_DECREASE), SetMinimalSize(12, 0), SetDataTip(AWV_DECREASE, STR_NULL),
 567                         NWidget(WWT_LABEL, COLOUR_GREY, WID_AP_LAYOUT_NUM), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_BLACK_STRING, STR_NULL),
 568                         NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_INCREASE), SetMinimalSize(12, 0), SetDataTip(AWV_INCREASE, STR_NULL),
 569                 EndContainer(),
 570                 NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_EXTRA_TEXT), SetFill(1, 0), SetMinimalSize(150, 0),
 571         EndContainer(),
 572         /* Bottom panel. */
 573         NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_AP_BOTTOMPANEL), SetPIP(2, 2, 2),
 574                 NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_COVERAGE_AREA_TITLE, STR_NULL), SetFill(1, 0),
 575                 NWidget(NWID_HORIZONTAL),
 576                         NWidget(NWID_SPACER), SetMinimalSize(14, 0), SetFill(1, 0),
 577                         NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
 578                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DONTHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 579                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_OFF, STR_STATION_BUILD_COVERAGE_AREA_OFF_TOOLTIP),
 580                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DOHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
 581                                                                                         SetDataTip(STR_STATION_BUILD_COVERAGE_ON, STR_STATION_BUILD_COVERAGE_AREA_ON_TOOLTIP),
 582                         EndContainer(),
 583                         NWidget(NWID_SPACER), SetMinimalSize(14, 0), SetFill(1, 0),
 584                 EndContainer(),
 585                 NWidget(NWID_SPACER), SetMinimalSize(0, 10), SetResize(0, 1), SetFill(1, 0),
 586         EndContainer(),
 587 };
 588
 589 static WindowDesc _build_airport_desc(
 590         WDP_AUTO, "build_station_air", 0, 0,
 591         WC_BUILD_STATION, WC_BUILD_TOOLBAR,
 592         WDF_CONSTRUCTION,
 593         _nested_build_airport_widgets, lengthof(_nested_build_airport_widgets)
 594 );
 595
 596 static void ShowBuildAirportPicker(Window *parent)
 597 {
 598         new BuildAirportWindow(&_build_airport_desc, parent);
 599 }
 600
 601 void InitializeAirportGui()
 602 {
 603         _selected_airport_class = APC_BEGIN;
 604         _selected_airport_index = -1;
 605 }