# airport_gui.cpp

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    00001 /* $Id: airport_gui.cpp 26789 2014-09-07 15:07:22Z frosch $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "window_gui.h"
    00014 #include "station_gui.h"
    00015 #include "terraform_gui.h"
    00016 #include "sound_func.h"
    00017 #include "window_func.h"
    00018 #include "strings_func.h"
    00019 #include "viewport_func.h"
    00020 #include "company_func.h"
    00021 #include "tilehighlight_func.h"
    00022 #include "company_base.h"
    00023 #include "station_type.h"
    00024 #include "newgrf_airport.h"
    00025 #include "newgrf_callbacks.h"
    00026 #include "widgets/dropdown_type.h"
    00027 #include "core/geometry_func.hpp"
    00028 #include "hotkeys.h"
    00029 #include "vehicle_func.h"
    00030 #include "gui.h"
    00031
    00032 #include "widgets/airport_widget.h"
    00033
    00034
    00035 static AirportClassID _selected_airport_class;
    00036 static int _selected_airport_index;
    00037 static byte _selected_airport_layout;
    00038
    00039 static void ShowBuildAirportPicker(Window *parent);
    00040
    00041 SpriteID GetCustomAirportSprite(const AirportSpec *as, byte layout);
    00042
    00043 void CcBuildAirport(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
    00044 {
    00045   if (result.Failed()) return;
    00046
    00047   if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_SPLAT_OTHER, tile);
    00048   if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
    00049 }
    00050
    00055 static void PlaceAirport(TileIndex tile)
    00056 {
    00057   if (_selected_airport_index == -1) return;
    00058   uint32 p2 = _ctrl_pressed;
    00059   SB(p2, 16, 16, INVALID_STATION); // no station to join
    00060
    00061   uint32 p1 = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index)->GetIndex();
    00062   p1 |= _selected_airport_layout << 8;
    00063   CommandContainer cmdcont = { tile, p1, p2, CMD_BUILD_AIRPORT | CMD_MSG(STR_ERROR_CAN_T_BUILD_AIRPORT_HERE), CcBuildAirport, "" };
    00064   ShowSelectStationIfNeeded(cmdcont, TileArea(tile, _thd.size.x / TILE_SIZE, _thd.size.y / TILE_SIZE));
    00065 }
    00066
    00068 struct BuildAirToolbarWindow : Window {
    00069   int last_user_action; // Last started user action.
    00070
    00071   BuildAirToolbarWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
    00072   {
    00073     this->InitNested(window_number);
    00074     if (_settings_client.gui.link_terraform_toolbar) ShowTerraformToolbar(this);
    00075     this->last_user_action = WIDGET_LIST_END;
    00076   }
    00077
    00078   ~BuildAirToolbarWindow()
    00079   {
    00080     if (_settings_client.gui.link_terraform_toolbar) DeleteWindowById(WC_SCEN_LAND_GEN, 0, false);
    00081   }
    00082
    00083   virtual void OnClick(Point pt, int widget, int click_count)
    00084   {
    00085     switch (widget) {
    00086       case WID_AT_AIRPORT:
    00087         if (HandlePlacePushButton(this, WID_AT_AIRPORT, SPR_CURSOR_AIRPORT, HT_RECT)) {
    00088           ShowBuildAirportPicker(this);
    00089           this->last_user_action = widget;
    00090         }
    00091         break;
    00092
    00093       case WID_AT_DEMOLISH:
    00094         HandlePlacePushButton(this, WID_AT_DEMOLISH, ANIMCURSOR_DEMOLISH, HT_RECT | HT_DIAGONAL);
    00095         this->last_user_action = widget;
    00096         break;
    00097
    00098       default: break;
    00099     }
    00100   }
    00101
    00102
    00103   virtual void OnPlaceObject(Point pt, TileIndex tile)
    00104   {
    00105     switch (this->last_user_action) {
    00106       case WID_AT_AIRPORT:
    00107         PlaceAirport(tile);
    00108         break;
    00109
    00110       case WID_AT_DEMOLISH:
    00111         PlaceProc_DemolishArea(tile);
    00112         break;
    00113
    00114       default: NOT_REACHED();
    00115     }
    00116   }
    00117
    00118   virtual void OnPlaceDrag(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt)
    00119   {
    00120     VpSelectTilesWithMethod(pt.x, pt.y, select_method);
    00121   }
    00122
    00123   virtual void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile)
    00124   {
    00125     if (pt.x != -1 && select_proc == DDSP_DEMOLISH_AREA) {
    00126       GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
    00127     }
    00128   }
    00129
    00130   virtual void OnPlaceObjectAbort()
    00131   {
    00132     this->RaiseButtons();
    00133
    00134     DeleteWindowById(WC_BUILD_STATION, TRANSPORT_AIR);
    00135     DeleteWindowById(WC_SELECT_STATION, 0);
    00136   }
    00137
    00138   static HotkeyList hotkeys;
    00139 };
    00140
    00146 static EventState AirportToolbarGlobalHotkeys(int hotkey)
    00147 {
    00148   if (_game_mode != GM_NORMAL || !CanBuildVehicleInfrastructure(VEH_AIRCRAFT)) return ES_NOT_HANDLED;
    00149   Window *w = ShowBuildAirToolbar();
    00150   if (w == NULL) return ES_NOT_HANDLED;
    00151   return w->OnHotkey(hotkey);
    00152 }
    00153
    00154 static Hotkey airtoolbar_hotkeys[] = {
    00155   Hotkey('1', "airport", WID_AT_AIRPORT),
    00156   Hotkey('2', "demolish", WID_AT_DEMOLISH),
    00157   HOTKEY_LIST_END
    00158 };
    00159 HotkeyList BuildAirToolbarWindow::hotkeys("airtoolbar", airtoolbar_hotkeys, AirportToolbarGlobalHotkeys);
    00160
    00161 static const NWidgetPart _nested_air_toolbar_widgets[] = {
    00162   NWidget(NWID_HORIZONTAL),
    00163     NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    00164     NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_TOOLBAR_AIRCRAFT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    00165     NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
    00166   EndContainer(),
    00167   NWidget(NWID_HORIZONTAL),
    00168     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),
    00169     NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetMinimalSize(4, 22), SetFill(1, 1), EndContainer(),
    00170     NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, WID_AT_DEMOLISH), SetFill(0, 1), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
    00171   EndContainer(),
    00172 };
    00173
    00174 static WindowDesc _air_toolbar_desc(
    00175   WDP_ALIGN_TOOLBAR, "toolbar_air", 0, 0,
    00176   WC_BUILD_TOOLBAR, WC_NONE,
    00177   WDF_CONSTRUCTION,
    00178   _nested_air_toolbar_widgets, lengthof(_nested_air_toolbar_widgets),
    00179   &BuildAirToolbarWindow::hotkeys
    00180 );
    00181
    00189 Window *ShowBuildAirToolbar()
    00190 {
    00191   if (!Company::IsValidID(_local_company)) return NULL;
    00192
    00193   DeleteWindowByClass(WC_BUILD_TOOLBAR);
    00194   return AllocateWindowDescFront<BuildAirToolbarWindow>(&_air_toolbar_desc, TRANSPORT_AIR);
    00195 }
    00196
    00197 class BuildAirportWindow : public PickerWindowBase {
    00198   SpriteID preview_sprite;
    00199   int line_height;
    00200   Scrollbar *vscroll;
    00201
    00203   static DropDownList *BuildAirportClassDropDown()
    00204   {
    00205     DropDownList *list = new DropDownList();
    00206
    00207     for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
    00208       *list->Append() = new DropDownListStringItem(AirportClass::Get((AirportClassID)i)->name, i, false);
    00209     }
    00210
    00211     return list;
    00212   }
    00213
    00214 public:
    00215   BuildAirportWindow(WindowDesc *desc, Window *parent) : PickerWindowBase(desc, parent)
    00216   {
    00217     this->CreateNestedTree();
    00218
    00219     this->vscroll = this->GetScrollbar(WID_AP_SCROLLBAR);
    00220     this->vscroll->SetCapacity(5);
    00221     this->vscroll->SetPosition(0);
    00222
    00223     this->FinishInitNested(TRANSPORT_AIR);
    00224
    00225     this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
    00226     this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
    00227     this->OnInvalidateData();
    00228
    00229     /* Ensure airport class is valid (changing NewGRFs). */
    00230     _selected_airport_class = Clamp(_selected_airport_class, APC_BEGIN, (AirportClassID)(AirportClass::GetClassCount() - 1));
    00231     const AirportClass *ac = AirportClass::Get(_selected_airport_class);
    00232     this->vscroll->SetCount(ac->GetSpecCount());
    00233
    00234     /* Ensure the airport index is valid for this class (changing NewGRFs). */
    00235     _selected_airport_index = Clamp(_selected_airport_index, -1, ac->GetSpecCount() - 1);
    00236
    00237     /* Only when no valid airport was selected, we want to select the first airport. */
    00238     bool selectFirstAirport = true;
    00239     if (_selected_airport_index != -1) {
    00240       const AirportSpec *as = ac->GetSpec(_selected_airport_index);
    00241       if (as->IsAvailable()) {
    00242         /* Ensure the airport layout is valid. */
    00243         _selected_airport_layout = Clamp(_selected_airport_layout, 0, as->num_table - 1);
    00244         selectFirstAirport = false;
    00245         this->UpdateSelectSize();
    00246       }
    00247     }
    00248
    00249     if (selectFirstAirport) this->SelectFirstAvailableAirport(true);
    00250   }
    00251
    00252   virtual ~BuildAirportWindow()
    00253   {
    00254     DeleteWindowById(WC_SELECT_STATION, 0);
    00255   }
    00256
    00257   virtual void SetStringParameters(int widget) const
    00258   {
    00259     switch (widget) {
    00260       case WID_AP_CLASS_DROPDOWN:
    00261         SetDParam(0, AirportClass::Get(_selected_airport_class)->name);
    00262         break;
    00263
    00264       case WID_AP_LAYOUT_NUM:
    00265         SetDParam(0, STR_EMPTY);
    00266         if (_selected_airport_index != -1) {
    00267           const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
    00268           StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_LAYOUT_NAME);
    00269           if (string != STR_UNDEFINED) {
    00270             SetDParam(0, string);
    00271           } else if (as->num_table > 1) {
    00272             SetDParam(0, STR_STATION_BUILD_AIRPORT_LAYOUT_NAME);
    00273             SetDParam(1, _selected_airport_layout + 1);
    00274           }
    00275         }
    00276         break;
    00277
    00278       default: break;
    00279     }
    00280   }
    00281
    00282   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
    00283   {
    00284     switch (widget) {
    00285       case WID_AP_CLASS_DROPDOWN: {
    00286         Dimension d = {0, 0};
    00287         for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
    00288           SetDParam(0, AirportClass::Get((AirportClassID)i)->name);
    00289           d = maxdim(d, GetStringBoundingBox(STR_BLACK_STRING));
    00290         }
    00291         d.width += padding.width;
    00292         d.height += padding.height;
    00293         *size = maxdim(*size, d);
    00294         break;
    00295       }
    00296
    00297       case WID_AP_AIRPORT_LIST: {
    00298         for (int i = 0; i < NUM_AIRPORTS; i++) {
    00299           const AirportSpec *as = AirportSpec::Get(i);
    00300           if (!as->enabled) continue;
    00301
    00302           size->width = max(size->width, GetStringBoundingBox(as->name).width);
    00303         }
    00304
    00305         this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
    00306         size->height = 5 * this->line_height;
    00307         break;
    00308       }
    00309
    00310       case WID_AP_AIRPORT_SPRITE:
    00311         for (int i = 0; i < NUM_AIRPORTS; i++) {
    00312           const AirportSpec *as = AirportSpec::Get(i);
    00313           if (!as->enabled) continue;
    00314           for (byte layout = 0; layout < as->num_table; layout++) {
    00315             SpriteID sprite = GetCustomAirportSprite(as, layout);
    00316             if (sprite != 0) {
    00317               Dimension d = GetSpriteSize(sprite);
    00318               d.width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
    00319               d.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
    00320               *size = maxdim(d, *size);
    00321             }
    00322           }
    00323         }
    00324         break;
    00325
    00326       case WID_AP_EXTRA_TEXT:
    00327         for (int i = NEW_AIRPORT_OFFSET; i < NUM_AIRPORTS; i++) {
    00328           const AirportSpec *as = AirportSpec::Get(i);
    00329           if (!as->enabled) continue;
    00330           for (byte layout = 0; layout < as->num_table; layout++) {
    00331             StringID string = GetAirportTextCallback(as, layout, CBID_AIRPORT_ADDITIONAL_TEXT);
    00332             if (string == STR_UNDEFINED) continue;
    00333
    00334             /* STR_BLACK_STRING is used to start the string with {BLACK} */
    00335             SetDParam(0, string);
    00336             Dimension d = GetStringMultiLineBoundingBox(STR_BLACK_STRING, *size);
    00337             *size = maxdim(d, *size);
    00338           }
    00339         }
    00340         break;
    00341
    00342       default: break;
    00343     }
    00344   }
    00345
    00346   virtual void DrawWidget(const Rect &r, int widget) const
    00347   {
    00348     switch (widget) {
    00349       case WID_AP_AIRPORT_LIST: {
    00350         int y = r.top;
    00351         AirportClass *apclass = AirportClass::Get(_selected_airport_class);
    00352         for (uint i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < apclass->GetSpecCount(); i++) {
    00353           const AirportSpec *as = apclass->GetSpec(i);
    00354           if (!as->IsAvailable()) {
    00355             GfxFillRect(r.left + 1, y + 1, r.right - 1, y + this->line_height - 2, PC_BLACK, FILLRECT_CHECKER);
    00356           }
    00357           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);
    00358           y += this->line_height;
    00359         }
    00360         break;
    00361       }
    00362
    00363       case WID_AP_AIRPORT_SPRITE:
    00364         if (this->preview_sprite != 0) {
    00365           Dimension d = GetSpriteSize(this->preview_sprite);
    00366           DrawSprite(this->preview_sprite, COMPANY_SPRITE_COLOUR(_local_company), (r.left + r.right - d.width) / 2, (r.top + r.bottom - d.height) / 2);
    00367         }
    00368         break;
    00369
    00370       case WID_AP_EXTRA_TEXT:
    00371         if (_selected_airport_index != -1) {
    00372           const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
    00373           StringID string = GetAirportTextCallback(as, _selected_airport_layout, CBID_AIRPORT_ADDITIONAL_TEXT);
    00374           if (string != STR_UNDEFINED) {
    00375             SetDParam(0, string);
    00376             DrawStringMultiLine(r.left, r.right, r.top, r.bottom, STR_BLACK_STRING);
    00377           }
    00378         }
    00379         break;
    00380     }
    00381   }
    00382
    00383   virtual void OnPaint()
    00384   {
    00385     this->DrawWidgets();
    00386
    00387     uint16 top = this->GetWidget<NWidgetBase>(WID_AP_BTN_DOHILIGHT)->pos_y + this->GetWidget<NWidgetBase>(WID_AP_BTN_DOHILIGHT)->current_y + WD_PAR_VSEP_NORMAL;
    00388     NWidgetBase *panel_nwi = this->GetWidget<NWidgetBase>(WID_AP_BOTTOMPANEL);
    00389
    00390     int right = panel_nwi->pos_x +  panel_nwi->current_x;
    00391     int bottom = panel_nwi->pos_y +  panel_nwi->current_y;
    00392
    00393     if (_selected_airport_index != -1) {
    00394       const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
    00395       int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
    00396
    00397       /* only show the station (airport) noise, if the noise option is activated */
    00398       if (_settings_game.economy.station_noise_level) {
    00399         /* show the noise of the selected airport */
    00400         SetDParam(0, as->noise_level);
    00401         DrawString(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, STR_STATION_BUILD_NOISE);
    00402         top += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
    00403       }
    00404
    00405       /* strings such as 'Size' and 'Coverage Area' */
    00406       top = DrawStationCoverageAreaText(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, SCT_ALL, rad, false) + WD_PAR_VSEP_NORMAL;
    00407       top = DrawStationCoverageAreaText(panel_nwi->pos_x + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, top, SCT_ALL, rad, true) + WD_PAR_VSEP_NORMAL;
    00408     }
    00409
    00410     /* Resize background if the window is too small.
    00411      * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
    00412      * (This is the case, if making the window bigger moves the mouse into the window.) */
    00413     if (top > bottom) {
    00414       ResizeWindow(this, 0, top - bottom);
    00415     }
    00416   }
    00417
    00418   void SelectOtherAirport(int airport_index)
    00419   {
    00420     _selected_airport_index = airport_index;
    00421     _selected_airport_layout = 0;
    00422
    00423     this->UpdateSelectSize();
    00424     this->SetDirty();
    00425   }
    00426
    00427   void UpdateSelectSize()
    00428   {
    00429     if (_selected_airport_index == -1) {
    00430       SetTileSelectSize(1, 1);
    00431       this->DisableWidget(WID_AP_LAYOUT_DECREASE);
    00432       this->DisableWidget(WID_AP_LAYOUT_INCREASE);
    00433     } else {
    00434       const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(_selected_airport_index);
    00435       int w = as->size_x;
    00436       int h = as->size_y;
    00437       Direction rotation = as->rotation[_selected_airport_layout];
    00438       if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
    00439       SetTileSelectSize(w, h);
    00440
    00441       this->preview_sprite = GetCustomAirportSprite(as, _selected_airport_layout);
    00442
    00443       this->SetWidgetDisabledState(WID_AP_LAYOUT_DECREASE, _selected_airport_layout == 0);
    00444       this->SetWidgetDisabledState(WID_AP_LAYOUT_INCREASE, _selected_airport_layout + 1 >= as->num_table);
    00445
    00446       int rad = _settings_game.station.modified_catchment ? as->catchment : (uint)CA_UNMODIFIED;
    00447       if (_settings_client.gui.station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
    00448     }
    00449   }
    00450
    00451   virtual void OnClick(Point pt, int widget, int click_count)
    00452   {
    00453     switch (widget) {
    00454       case WID_AP_CLASS_DROPDOWN:
    00455         ShowDropDownList(this, BuildAirportClassDropDown(), _selected_airport_class, WID_AP_CLASS_DROPDOWN);
    00456         break;
    00457
    00458       case WID_AP_AIRPORT_LIST: {
    00459         int num_clicked = this->vscroll->GetPosition() + (pt.y - this->nested_array[widget]->pos_y) / this->line_height;
    00460         if (num_clicked >= this->vscroll->GetCount()) break;
    00461         const AirportSpec *as = AirportClass::Get(_selected_airport_class)->GetSpec(num_clicked);
    00462         if (as->IsAvailable()) this->SelectOtherAirport(num_clicked);
    00463         break;
    00464       }
    00465
    00466       case WID_AP_BTN_DONTHILIGHT: case WID_AP_BTN_DOHILIGHT:
    00467         _settings_client.gui.station_show_coverage = (widget != WID_AP_BTN_DONTHILIGHT);
    00468         this->SetWidgetLoweredState(WID_AP_BTN_DONTHILIGHT, !_settings_client.gui.station_show_coverage);
    00469         this->SetWidgetLoweredState(WID_AP_BTN_DOHILIGHT, _settings_client.gui.station_show_coverage);
    00470         this->SetDirty();
    00471         if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
    00472         this->UpdateSelectSize();
    00473         break;
    00474
    00475       case WID_AP_LAYOUT_DECREASE:
    00476         _selected_airport_layout--;
    00477         this->UpdateSelectSize();
    00478         this->SetDirty();
    00479         break;
    00480
    00481       case WID_AP_LAYOUT_INCREASE:
    00482         _selected_airport_layout++;
    00483         this->UpdateSelectSize();
    00484         this->SetDirty();
    00485         break;
    00486     }
    00487   }
    00488
    00494   void SelectFirstAvailableAirport(bool change_class)
    00495   {
    00496     /* First try to select an airport in the selected class. */
    00497     AirportClass *sel_apclass = AirportClass::Get(_selected_airport_class);
    00498     for (uint i = 0; i < sel_apclass->GetSpecCount(); i++) {
    00499       const AirportSpec *as = sel_apclass->GetSpec(i);
    00500       if (as->IsAvailable()) {
    00501         this->SelectOtherAirport(i);
    00502         return;
    00503       }
    00504     }
    00505     if (change_class) {
    00506       /* If that fails, select the first available airport
    00507        * from a random class. */
    00508       for (AirportClassID j = APC_BEGIN; j < APC_MAX; j++) {
    00509         AirportClass *apclass = AirportClass::Get(j);
    00510         for (uint i = 0; i < apclass->GetSpecCount(); i++) {
    00511           const AirportSpec *as = apclass->GetSpec(i);
    00512           if (as->IsAvailable()) {
    00513             _selected_airport_class = j;
    00514             this->SelectOtherAirport(i);
    00515             return;
    00516           }
    00517         }
    00518       }
    00519     }
    00520     /* If all airports are unavailable, select nothing. */
    00521     this->SelectOtherAirport(-1);
    00522   }
    00523
    00524   virtual void OnDropdownSelect(int widget, int index)
    00525   {
    00526     assert(widget == WID_AP_CLASS_DROPDOWN);
    00527     _selected_airport_class = (AirportClassID)index;
    00528     this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
    00529     this->SelectFirstAvailableAirport(false);
    00530   }
    00531
    00532   virtual void OnTick()
    00533   {
    00534     CheckRedrawStationCoverage(this);
    00535   }
    00536 };
    00537
    00538 static const NWidgetPart _nested_build_airport_widgets[] = {
    00539   NWidget(NWID_HORIZONTAL),
    00540     NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    00541     NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    00542   EndContainer(),
    00543   NWidget(WWT_PANEL, COLOUR_DARK_GREEN), SetFill(1, 0), SetPIP(2, 0, 2),
    00544     NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_AIRPORT_CLASS_LABEL, STR_NULL), SetFill(1, 0),
    00545     NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_AP_CLASS_DROPDOWN), SetFill(1, 0), SetDataTip(STR_BLACK_STRING, STR_STATION_BUILD_AIRPORT_TOOLTIP),
    00546     NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_AIRPORT_SPRITE), SetFill(1, 0),
    00547     NWidget(NWID_HORIZONTAL),
    00548       NWidget(WWT_MATRIX, COLOUR_GREY, WID_AP_AIRPORT_LIST), SetFill(1, 0), SetMatrixDataTip(1, 5, STR_STATION_BUILD_AIRPORT_TOOLTIP), SetScrollbar(WID_AP_SCROLLBAR),
    00549       NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_AP_SCROLLBAR),
    00550     EndContainer(),
    00551     NWidget(NWID_HORIZONTAL),
    00552       NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_DECREASE), SetMinimalSize(12, 0), SetDataTip(AWV_DECREASE, STR_NULL),
    00553       NWidget(WWT_LABEL, COLOUR_GREY, WID_AP_LAYOUT_NUM), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_BLACK_STRING, STR_NULL),
    00554       NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_AP_LAYOUT_INCREASE), SetMinimalSize(12, 0), SetDataTip(AWV_INCREASE, STR_NULL),
    00555     EndContainer(),
    00556     NWidget(WWT_EMPTY, COLOUR_DARK_GREEN, WID_AP_EXTRA_TEXT), SetFill(1, 0), SetMinimalSize(150, 0),
    00557   EndContainer(),
    00558   /* Bottom panel. */
    00559   NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_AP_BOTTOMPANEL), SetPIP(2, 2, 2),
    00560     NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetDataTip(STR_STATION_BUILD_COVERAGE_AREA_TITLE, STR_NULL), SetFill(1, 0),
    00561     NWidget(NWID_HORIZONTAL),
    00562       NWidget(NWID_SPACER), SetMinimalSize(14, 0), SetFill(1, 0),
    00563       NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
    00564         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DONTHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
    00565                       SetDataTip(STR_STATION_BUILD_COVERAGE_OFF, STR_STATION_BUILD_COVERAGE_AREA_OFF_TOOLTIP),
    00566         NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AP_BTN_DOHILIGHT), SetMinimalSize(60, 12), SetFill(1, 0),
    00567                       SetDataTip(STR_STATION_BUILD_COVERAGE_ON, STR_STATION_BUILD_COVERAGE_AREA_ON_TOOLTIP),
    00568       EndContainer(),
    00569       NWidget(NWID_SPACER), SetMinimalSize(14, 0), SetFill(1, 0),
    00570     EndContainer(),
    00571     NWidget(NWID_SPACER), SetMinimalSize(0, 10), SetResize(0, 1), SetFill(1, 0),
    00572   EndContainer(),
    00573 };
    00574
    00575 static WindowDesc _build_airport_desc(
    00576   WDP_AUTO, "build_station_air", 0, 0,
    00577   WC_BUILD_STATION, WC_BUILD_TOOLBAR,
    00578   WDF_CONSTRUCTION,
    00579   _nested_build_airport_widgets, lengthof(_nested_build_airport_widgets)
    00580 );
    00581
    00582 static void ShowBuildAirportPicker(Window *parent)
    00583 {
    00584   new BuildAirportWindow(&_build_airport_desc, parent);
    00585 }
    00586
    00587 void InitializeAirportGui()
    00588 {
    00589   _selected_airport_class = APC_BEGIN;
    00590   _selected_airport_index = -1;
    00591 }