misc_gui.cpp

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00001 /* $Id$ */
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 "debug.h"
00014 #include "landscape.h"
00015 #include "error.h"
00016 #include "gui.h"
00017 #include "command_func.h"
00018 #include "company_func.h"
00019 #include "town.h"
00020 #include "string_func.h"
00021 #include "company_base.h"
00022 #include "texteff.hpp"
00023 #include "strings_func.h"
00024 #include "window_func.h"
00025 #include "querystring_gui.h"
00026 #include "core/geometry_func.hpp"
00027 #include "newgrf_debug.h"
00028 
00029 #include "widgets/misc_widget.h"
00030 
00031 #include "table/strings.h"
00032 
00034 enum OskActivation {
00035   OSKA_DISABLED,           
00036   OSKA_DOUBLE_CLICK,       
00037   OSKA_SINGLE_CLICK,       
00038   OSKA_IMMEDIATELY,        
00039 };
00040 
00041 
00042 static const NWidgetPart _nested_land_info_widgets[] = {
00043   NWidget(NWID_HORIZONTAL),
00044     NWidget(WWT_CLOSEBOX, COLOUR_GREY),
00045     NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_LAND_AREA_INFORMATION_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
00046     NWidget(WWT_DEBUGBOX, COLOUR_GREY),
00047   EndContainer(),
00048   NWidget(WWT_PANEL, COLOUR_GREY, WID_LI_BACKGROUND), EndContainer(),
00049 };
00050 
00051 static WindowDesc _land_info_desc(
00052   WDP_AUTO, "land_info", 0, 0,
00053   WC_LAND_INFO, WC_NONE,
00054   0,
00055   _nested_land_info_widgets, lengthof(_nested_land_info_widgets)
00056 );
00057 
00058 class LandInfoWindow : public Window {
00059   enum LandInfoLines {
00060     LAND_INFO_CENTERED_LINES   = 12,                       
00061     LAND_INFO_MULTICENTER_LINE = LAND_INFO_CENTERED_LINES, 
00062     LAND_INFO_LINE_END,
00063   };
00064 
00065   static const uint LAND_INFO_LINE_BUFF_SIZE = 512;
00066 
00067 public:
00068   char landinfo_data[LAND_INFO_LINE_END][LAND_INFO_LINE_BUFF_SIZE];
00069   TileIndex tile;
00070 
00071   virtual void DrawWidget(const Rect &r, int widget) const
00072   {
00073     if (widget != WID_LI_BACKGROUND) return;
00074 
00075     uint y = r.top + WD_TEXTPANEL_TOP;
00076     for (uint i = 0; i < LAND_INFO_CENTERED_LINES; i++) {
00077       if (StrEmpty(this->landinfo_data[i])) break;
00078 
00079       DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, this->landinfo_data[i], i == 0 ? TC_LIGHT_BLUE : TC_FROMSTRING, SA_HOR_CENTER);
00080       y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
00081       if (i == 0) y += 4;
00082     }
00083 
00084     if (!StrEmpty(this->landinfo_data[LAND_INFO_MULTICENTER_LINE])) {
00085       SetDParamStr(0, this->landinfo_data[LAND_INFO_MULTICENTER_LINE]);
00086       DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, r.bottom - WD_TEXTPANEL_BOTTOM, STR_JUST_RAW_STRING, TC_FROMSTRING, SA_CENTER);
00087     }
00088   }
00089 
00090   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00091   {
00092     if (widget != WID_LI_BACKGROUND) return;
00093 
00094     size->height = WD_TEXTPANEL_TOP + WD_TEXTPANEL_BOTTOM;
00095     for (uint i = 0; i < LAND_INFO_CENTERED_LINES; i++) {
00096       if (StrEmpty(this->landinfo_data[i])) break;
00097 
00098       uint width = GetStringBoundingBox(this->landinfo_data[i]).width + WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT;
00099       size->width = max(size->width, width);
00100 
00101       size->height += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
00102       if (i == 0) size->height += 4;
00103     }
00104 
00105     if (!StrEmpty(this->landinfo_data[LAND_INFO_MULTICENTER_LINE])) {
00106       uint width = GetStringBoundingBox(this->landinfo_data[LAND_INFO_MULTICENTER_LINE]).width + WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT;
00107       size->width = max(size->width, min(300u, width));
00108       SetDParamStr(0, this->landinfo_data[LAND_INFO_MULTICENTER_LINE]);
00109       size->height += GetStringHeight(STR_JUST_RAW_STRING, size->width - WD_FRAMETEXT_LEFT - WD_FRAMETEXT_RIGHT);
00110     }
00111   }
00112 
00113   LandInfoWindow(TileIndex tile) : Window(&_land_info_desc), tile(tile)
00114   {
00115     this->InitNested();
00116 
00117 #if defined(_DEBUG)
00118 # define LANDINFOD_LEVEL 0
00119 #else
00120 # define LANDINFOD_LEVEL 1
00121 #endif
00122     DEBUG(misc, LANDINFOD_LEVEL, "TILE: %#x (%i,%i)", tile, TileX(tile), TileY(tile));
00123     DEBUG(misc, LANDINFOD_LEVEL, "type_height  = %#x", _m[tile].type_height);
00124     DEBUG(misc, LANDINFOD_LEVEL, "m1           = %#x", _m[tile].m1);
00125     DEBUG(misc, LANDINFOD_LEVEL, "m2           = %#x", _m[tile].m2);
00126     DEBUG(misc, LANDINFOD_LEVEL, "m3           = %#x", _m[tile].m3);
00127     DEBUG(misc, LANDINFOD_LEVEL, "m4           = %#x", _m[tile].m4);
00128     DEBUG(misc, LANDINFOD_LEVEL, "m5           = %#x", _m[tile].m5);
00129     DEBUG(misc, LANDINFOD_LEVEL, "m6           = %#x", _m[tile].m6);
00130     DEBUG(misc, LANDINFOD_LEVEL, "m7           = %#x", _me[tile].m7);
00131 #undef LANDINFOD_LEVEL
00132   }
00133 
00134   virtual void OnInit()
00135   {
00136     Town *t = ClosestTownFromTile(tile, _settings_game.economy.dist_local_authority);
00137 
00138     /* Because build_date is not set yet in every TileDesc, we make sure it is empty */
00139     TileDesc td;
00140 
00141     td.build_date = INVALID_DATE;
00142 
00143     /* Most tiles have only one owner, but
00144      *  - drivethrough roadstops can be build on town owned roads (up to 2 owners) and
00145      *  - roads can have up to four owners (railroad, road, tram, 3rd-roadtype "highway").
00146      */
00147     td.owner_type[0] = STR_LAND_AREA_INFORMATION_OWNER; // At least one owner is displayed, though it might be "N/A".
00148     td.owner_type[1] = STR_NULL;       // STR_NULL results in skipping the owner
00149     td.owner_type[2] = STR_NULL;
00150     td.owner_type[3] = STR_NULL;
00151     td.owner[0] = OWNER_NONE;
00152     td.owner[1] = OWNER_NONE;
00153     td.owner[2] = OWNER_NONE;
00154     td.owner[3] = OWNER_NONE;
00155 
00156     td.station_class = STR_NULL;
00157     td.station_name = STR_NULL;
00158     td.airport_class = STR_NULL;
00159     td.airport_name = STR_NULL;
00160     td.airport_tile_name = STR_NULL;
00161     td.rail_speed = 0;
00162 
00163     td.grf = NULL;
00164 
00165     CargoArray acceptance;
00166     AddAcceptedCargo(tile, acceptance, NULL);
00167     GetTileDesc(tile, &td);
00168 
00169     uint line_nr = 0;
00170 
00171     /* Tiletype */
00172     SetDParam(0, td.dparam[0]);
00173     GetString(this->landinfo_data[line_nr], td.str, lastof(this->landinfo_data[line_nr]));
00174     line_nr++;
00175 
00176     /* Up to four owners */
00177     for (uint i = 0; i < 4; i++) {
00178       if (td.owner_type[i] == STR_NULL) continue;
00179 
00180       SetDParam(0, STR_LAND_AREA_INFORMATION_OWNER_N_A);
00181       if (td.owner[i] != OWNER_NONE && td.owner[i] != OWNER_WATER) GetNameOfOwner(td.owner[i], tile);
00182       GetString(this->landinfo_data[line_nr], td.owner_type[i], lastof(this->landinfo_data[line_nr]));
00183       line_nr++;
00184     }
00185 
00186     /* Cost to clear/revenue when cleared */
00187     StringID str = STR_LAND_AREA_INFORMATION_COST_TO_CLEAR_N_A;
00188     Company *c = Company::GetIfValid(_local_company);
00189     if (c != NULL) {
00190       Money old_money = c->money;
00191       c->money = INT64_MAX;
00192       assert(_current_company == _local_company);
00193       CommandCost costclear = DoCommand(tile, 0, 0, DC_NONE, CMD_LANDSCAPE_CLEAR);
00194       c->money = old_money;
00195       if (costclear.Succeeded()) {
00196         Money cost = costclear.GetCost();
00197         if (cost < 0) {
00198           cost = -cost; // Negate negative cost to a positive revenue
00199           str = STR_LAND_AREA_INFORMATION_REVENUE_WHEN_CLEARED;
00200         } else {
00201           str = STR_LAND_AREA_INFORMATION_COST_TO_CLEAR;
00202         }
00203         SetDParam(0, cost);
00204       }
00205     }
00206     GetString(this->landinfo_data[line_nr], str, lastof(this->landinfo_data[line_nr]));
00207     line_nr++;
00208 
00209     /* Location */
00210     char tmp[16];
00211     snprintf(tmp, lengthof(tmp), "0x%.4X", tile);
00212     SetDParam(0, TileX(tile));
00213     SetDParam(1, TileY(tile));
00214     SetDParam(2, GetTileZ(tile));
00215     SetDParamStr(3, tmp);
00216     GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_LANDINFO_COORDS, lastof(this->landinfo_data[line_nr]));
00217     line_nr++;
00218 
00219     /* Local authority */
00220     SetDParam(0, STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY_NONE);
00221     if (t != NULL) {
00222       SetDParam(0, STR_TOWN_NAME);
00223       SetDParam(1, t->index);
00224     }
00225     GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY, lastof(this->landinfo_data[line_nr]));
00226     line_nr++;
00227 
00228     /* Build date */
00229     if (td.build_date != INVALID_DATE) {
00230       SetDParam(0, td.build_date);
00231       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_BUILD_DATE, lastof(this->landinfo_data[line_nr]));
00232       line_nr++;
00233     }
00234 
00235     /* Station class */
00236     if (td.station_class != STR_NULL) {
00237       SetDParam(0, td.station_class);
00238       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_STATION_CLASS, lastof(this->landinfo_data[line_nr]));
00239       line_nr++;
00240     }
00241 
00242     /* Station type name */
00243     if (td.station_name != STR_NULL) {
00244       SetDParam(0, td.station_name);
00245       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_STATION_TYPE, lastof(this->landinfo_data[line_nr]));
00246       line_nr++;
00247     }
00248 
00249     /* Airport class */
00250     if (td.airport_class != STR_NULL) {
00251       SetDParam(0, td.airport_class);
00252       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_AIRPORT_CLASS, lastof(this->landinfo_data[line_nr]));
00253       line_nr++;
00254     }
00255 
00256     /* Airport name */
00257     if (td.airport_name != STR_NULL) {
00258       SetDParam(0, td.airport_name);
00259       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_AIRPORT_NAME, lastof(this->landinfo_data[line_nr]));
00260       line_nr++;
00261     }
00262 
00263     /* Airport tile name */
00264     if (td.airport_tile_name != STR_NULL) {
00265       SetDParam(0, td.airport_tile_name);
00266       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_AIRPORTTILE_NAME, lastof(this->landinfo_data[line_nr]));
00267       line_nr++;
00268     }
00269 
00270     /* Rail speed limit */
00271     if (td.rail_speed != 0) {
00272       SetDParam(0, td.rail_speed);
00273       GetString(this->landinfo_data[line_nr], STR_LANG_AREA_INFORMATION_RAIL_SPEED_LIMIT, lastof(this->landinfo_data[line_nr]));
00274       line_nr++;
00275     }
00276 
00277     /* NewGRF name */
00278     if (td.grf != NULL) {
00279       SetDParamStr(0, td.grf);
00280       GetString(this->landinfo_data[line_nr], STR_LAND_AREA_INFORMATION_NEWGRF_NAME, lastof(this->landinfo_data[line_nr]));
00281       line_nr++;
00282     }
00283 
00284     assert(line_nr < LAND_INFO_CENTERED_LINES);
00285 
00286     /* Mark last line empty */
00287     this->landinfo_data[line_nr][0] = '\0';
00288 
00289     /* Cargo acceptance is displayed in a extra multiline */
00290     char *strp = GetString(this->landinfo_data[LAND_INFO_MULTICENTER_LINE], STR_LAND_AREA_INFORMATION_CARGO_ACCEPTED, lastof(this->landinfo_data[LAND_INFO_MULTICENTER_LINE]));
00291     bool found = false;
00292 
00293     for (CargoID i = 0; i < NUM_CARGO; ++i) {
00294       if (acceptance[i] > 0) {
00295         /* Add a comma between each item. */
00296         if (found) {
00297           *strp++ = ',';
00298           *strp++ = ' ';
00299         }
00300         found = true;
00301 
00302         /* If the accepted value is less than 8, show it in 1/8:ths */
00303         if (acceptance[i] < 8) {
00304           SetDParam(0, acceptance[i]);
00305           SetDParam(1, CargoSpec::Get(i)->name);
00306           strp = GetString(strp, STR_LAND_AREA_INFORMATION_CARGO_EIGHTS, lastof(this->landinfo_data[LAND_INFO_MULTICENTER_LINE]));
00307         } else {
00308           strp = GetString(strp, CargoSpec::Get(i)->name, lastof(this->landinfo_data[LAND_INFO_MULTICENTER_LINE]));
00309         }
00310       }
00311     }
00312     if (!found) this->landinfo_data[LAND_INFO_MULTICENTER_LINE][0] = '\0';
00313   }
00314 
00315   virtual bool IsNewGRFInspectable() const
00316   {
00317     return ::IsNewGRFInspectable(GetGrfSpecFeature(this->tile), this->tile);
00318   }
00319 
00320   virtual void ShowNewGRFInspectWindow() const
00321   {
00322 		::ShowNewGRFInspectWindow(GetGrfSpecFeature(this->tile), this->tile);
00323   }
00324 
00330   virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
00331   {
00332     if (!gui_scope) return;
00333     switch (data) {
00334       case 1:
00335         /* ReInit, "debug" sprite might have changed */
00336         this->ReInit();
00337         break;
00338     }
00339   }
00340 };
00341 
00346 void ShowLandInfo(TileIndex tile)
00347 {
00348   DeleteWindowById(WC_LAND_INFO, 0);
00349   new LandInfoWindow(tile);
00350 }
00351 
00352 static const NWidgetPart _nested_about_widgets[] = {
00353   NWidget(NWID_HORIZONTAL),
00354     NWidget(WWT_CLOSEBOX, COLOUR_GREY),
00355     NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_ABOUT_OPENTTD, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
00356   EndContainer(),
00357   NWidget(WWT_PANEL, COLOUR_GREY), SetPIP(4, 2, 4),
00358     NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_ABOUT_ORIGINAL_COPYRIGHT, STR_NULL),
00359     NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_ABOUT_VERSION, STR_NULL),
00360     NWidget(WWT_FRAME, COLOUR_GREY), SetPadding(0, 5, 1, 5),
00361       NWidget(WWT_EMPTY, INVALID_COLOUR, WID_A_SCROLLING_TEXT),
00362     EndContainer(),
00363     NWidget(WWT_LABEL, COLOUR_GREY, WID_A_WEBSITE), SetDataTip(STR_BLACK_RAW_STRING, STR_NULL),
00364     NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_ABOUT_COPYRIGHT_OPENTTD, STR_NULL),
00365   EndContainer(),
00366 };
00367 
00368 static WindowDesc _about_desc(
00369   WDP_CENTER, NULL, 0, 0,
00370   WC_GAME_OPTIONS, WC_NONE,
00371   0,
00372   _nested_about_widgets, lengthof(_nested_about_widgets)
00373 );
00374 
00375 static const char * const _credits[] = {
00376   "Original design by Chris Sawyer",
00377   "Original graphics by Simon Foster",
00378   "",
00379   "The OpenTTD team (in alphabetical order):",
00380   "  Albert Hofkamp (Alberth) - GUI expert",
00381   "  Jean-Fran\xC3\xA7ois Claeys (Belugas) - GUI, newindustries and more",
00382   "  Matthijs Kooijman (blathijs) - Pathfinder-guru, pool rework",
00383   "  Christoph Elsenhans (frosch) - General coding",
00384   "  Lo\xC3\xAF""c Guilloux (glx) - Windows Expert",
00385   "  Michael Lutz (michi_cc) - Path based signals",
00386   "  Owen Rudge (orudge) - Forum host, OS/2 port",
00387   "  Peter Nelson (peter1138) - Spiritual descendant from NewGRF gods",
00388   "  Ingo von Borstel (planetmaker) - Support",
00389   "  Remko Bijker (Rubidium) - Lead coder and way more",
00390   "  Zden\xC4\x9Bk Sojka (SmatZ) - Bug finder and fixer",
00391   "  Jos\xC3\xA9 Soler (Terkhen) - General coding",
00392   "  Thijs Marinussen (Yexo) - AI Framework",
00393   "  Leif Linse (Zuu) - AI/Game Script",
00394   "",
00395   "Inactive Developers:",
00396   "  Bjarni Corfitzen (Bjarni) - MacOSX port, coder and vehicles",
00397   "  Victor Fischer (Celestar) - Programming everywhere you need him to",
00398   "  Tam\xC3\xA1s Farag\xC3\xB3 (Darkvater) - Ex-Lead coder",
00399   "  Jaroslav Mazanec (KUDr) - YAPG (Yet Another Pathfinder God) ;)",
00400   "  Jonathan Coome (Maedhros) - High priest of the NewGRF Temple",
00401   "  Attila B\xC3\xA1n (MiHaMiX) - Developer WebTranslator 1 and 2",
00402   "  Christoph Mallon (Tron) - Programmer, code correctness police",
00403   "",
00404   "Retired Developers:",
00405   "  Ludvig Strigeus (ludde) - OpenTTD author, main coder (0.1 - 0.3.3)",
00406   "  Serge Paquet (vurlix) - Assistant project manager, coder (0.1 - 0.3.3)",
00407   "  Dominik Scherer (dominik81) - Lead programmer, GUI expert (0.3.0 - 0.3.6)",
00408   "  Benedikt Br\xC3\xBCggemeier (skidd13) - Bug fixer and code reworker",
00409   "  Patric Stout (TrueBrain) - NoProgrammer (0.3 - 1.2), sys op (active)",
00410   "",
00411   "Special thanks go out to:",
00412   "  Josef Drexler - For his great work on TTDPatch",
00413   "  Marcin Grzegorczyk - Track foundations and for describing TTD internals",
00414   "  Petr Baudi\xC5\xA1 (pasky) - Many patches, newGRF support",
00415   "  Simon Sasburg (HackyKid) - Many bugfixes he has blessed us with",
00416   "  Stefan Mei\xC3\x9Fner (sign_de) - For his work on the console",
00417   "  Mike Ragsdale - OpenTTD installer",
00418   "  Cian Duffy (MYOB) - BeOS port / manual writing",
00419   "  Christian Rosentreter (tokai) - MorphOS / AmigaOS port",
00420   "  Richard Kempton (richK) - additional airports, initial TGP implementation",
00421   "",
00422   "  Alberto Demichelis - Squirrel scripting language \xC2\xA9 2003-2008",
00423   "  L. Peter Deutsch - MD5 implementation \xC2\xA9 1999, 2000, 2002",
00424   "  Michael Blunck - Pre-signals and semaphores \xC2\xA9 2003",
00425   "  George - Canal/Lock graphics \xC2\xA9 2003-2004",
00426   "  Andrew Parkhouse (andythenorth) - River graphics",
00427   "  David Dallaston (Pikka) - Tram tracks",
00428   "  All Translators - Who made OpenTTD a truly international game",
00429   "  Bug Reporters - Without whom OpenTTD would still be full of bugs!",
00430   "",
00431   "",
00432   "And last but not least:",
00433   "  Chris Sawyer - For an amazing game!"
00434 };
00435 
00436 struct AboutWindow : public Window {
00437   int text_position;                       
00438   byte counter;                            
00439   int line_height;                         
00440   static const int num_visible_lines = 19; 
00441 
00442   AboutWindow() : Window(&_about_desc)
00443   {
00444     this->InitNested(WN_GAME_OPTIONS_ABOUT);
00445 
00446     this->counter = 5;
00447     this->text_position = this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y + this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->current_y;
00448   }
00449 
00450   virtual void SetStringParameters(int widget) const
00451   {
00452     if (widget == WID_A_WEBSITE) SetDParamStr(0, "Website: http://www.openttd.org");
00453   }
00454 
00455   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00456   {
00457     if (widget != WID_A_SCROLLING_TEXT) return;
00458 
00459     this->line_height = FONT_HEIGHT_NORMAL;
00460 
00461     Dimension d;
00462     d.height = this->line_height * num_visible_lines;
00463 
00464     d.width = 0;
00465     for (uint i = 0; i < lengthof(_credits); i++) {
00466       d.width = max(d.width, GetStringBoundingBox(_credits[i]).width);
00467     }
00468     *size = maxdim(*size, d);
00469   }
00470 
00471   virtual void DrawWidget(const Rect &r, int widget) const
00472   {
00473     if (widget != WID_A_SCROLLING_TEXT) return;
00474 
00475     int y = this->text_position;
00476 
00477     /* Show all scrolling _credits */
00478     for (uint i = 0; i < lengthof(_credits); i++) {
00479       if (y >= r.top + 7 && y < r.bottom - this->line_height) {
00480         DrawString(r.left, r.right, y, _credits[i], TC_BLACK, SA_LEFT | SA_FORCE);
00481       }
00482       y += this->line_height;
00483     }
00484   }
00485 
00486   virtual void OnTick()
00487   {
00488     if (--this->counter == 0) {
00489       this->counter = 5;
00490       this->text_position--;
00491       /* If the last text has scrolled start a new from the start */
00492       if (this->text_position < (int)(this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y - lengthof(_credits) * this->line_height)) {
00493         this->text_position = this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y + this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->current_y;
00494       }
00495       this->SetDirty();
00496     }
00497   }
00498 };
00499 
00500 void ShowAboutWindow()
00501 {
00502   DeleteWindowByClass(WC_GAME_OPTIONS);
00503   new AboutWindow();
00504 }
00505 
00512 void ShowEstimatedCostOrIncome(Money cost, int x, int y)
00513 {
00514   StringID msg = STR_MESSAGE_ESTIMATED_COST;
00515 
00516   if (cost < 0) {
00517     cost = -cost;
00518     msg = STR_MESSAGE_ESTIMATED_INCOME;
00519   }
00520   SetDParam(0, cost);
00521   ShowErrorMessage(msg, INVALID_STRING_ID, WL_INFO, x, y);
00522 }
00523 
00531 void ShowCostOrIncomeAnimation(int x, int y, int z, Money cost)
00532 {
00533   Point pt = RemapCoords(x, y, z);
00534   StringID msg = STR_INCOME_FLOAT_COST;
00535 
00536   if (cost < 0) {
00537     cost = -cost;
00538     msg = STR_INCOME_FLOAT_INCOME;
00539   }
00540   SetDParam(0, cost);
00541   AddTextEffect(msg, pt.x, pt.y, DAY_TICKS, TE_RISING);
00542 }
00543 
00552 void ShowFeederIncomeAnimation(int x, int y, int z, Money transfer, Money income)
00553 {
00554   Point pt = RemapCoords(x, y, z);
00555 
00556   SetDParam(0, transfer);
00557   if (income == 0) {
00558     AddTextEffect(STR_FEEDER, pt.x, pt.y, DAY_TICKS, TE_RISING);
00559   } else {
00560     StringID msg = STR_FEEDER_COST;
00561     if (income < 0) {
00562       income = -income;
00563       msg = STR_FEEDER_INCOME;
00564     }
00565     SetDParam(1, income);
00566     AddTextEffect(msg, pt.x, pt.y, DAY_TICKS, TE_RISING);
00567   }
00568 }
00569 
00579 TextEffectID ShowFillingPercent(int x, int y, int z, uint8 percent, StringID string)
00580 {
00581   Point pt = RemapCoords(x, y, z);
00582 
00583   assert(string != STR_NULL);
00584 
00585   SetDParam(0, percent);
00586   return AddTextEffect(string, pt.x, pt.y, 0, TE_STATIC);
00587 }
00588 
00594 void UpdateFillingPercent(TextEffectID te_id, uint8 percent, StringID string)
00595 {
00596   assert(string != STR_NULL);
00597 
00598   SetDParam(0, percent);
00599   UpdateTextEffect(te_id, string);
00600 }
00601 
00606 void HideFillingPercent(TextEffectID *te_id)
00607 {
00608   if (*te_id == INVALID_TE_ID) return;
00609 
00610   RemoveTextEffect(*te_id);
00611   *te_id = INVALID_TE_ID;
00612 }
00613 
00614 static const NWidgetPart _nested_tooltips_widgets[] = {
00615   NWidget(WWT_PANEL, COLOUR_GREY, WID_TT_BACKGROUND), SetMinimalSize(200, 32), EndContainer(),
00616 };
00617 
00618 static WindowDesc _tool_tips_desc(
00619   WDP_MANUAL, NULL, 0, 0, // Coordinates and sizes are not used,
00620   WC_TOOLTIPS, WC_NONE,
00621   0,
00622   _nested_tooltips_widgets, lengthof(_nested_tooltips_widgets)
00623 );
00624 
00626 struct TooltipsWindow : public Window
00627 {
00628   StringID string_id;               
00629   byte paramcount;                  
00630   uint64 params[5];                 
00631   TooltipCloseCondition close_cond; 
00632 
00633   TooltipsWindow(Window *parent, StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_tooltip) : Window(&_tool_tips_desc)
00634   {
00635     this->parent = parent;
00636     this->string_id = str;
00637     assert_compile(sizeof(this->params[0]) == sizeof(params[0]));
00638     assert(paramcount <= lengthof(this->params));
00639     memcpy(this->params, params, sizeof(this->params[0]) * paramcount);
00640     this->paramcount = paramcount;
00641     this->close_cond = close_tooltip;
00642 
00643     this->InitNested();
00644 
00645     CLRBITS(this->flags, WF_WHITE_BORDER);
00646   }
00647 
00648   virtual Point OnInitialPosition(int16 sm_width, int16 sm_height, int window_number)
00649   {
00650     /* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
00651      * Add a fixed distance 2 so the tooltip floats free from both bars.
00652      */
00653     int scr_top = GetMainViewTop() + 2;
00654     int scr_bot = GetMainViewBottom() - 2;
00655 
00656     Point pt;
00657 
00658     /* Correctly position the tooltip position, watch out for window and cursor size
00659      * Clamp value to below main toolbar and above statusbar. If tooltip would
00660      * go below window, flip it so it is shown above the cursor */
00661     pt.y = Clamp(_cursor.pos.y + _cursor.size.y + _cursor.offs.y + 5, scr_top, scr_bot);
00662     if (pt.y + sm_height > scr_bot) pt.y = min(_cursor.pos.y + _cursor.offs.y - 5, scr_bot) - sm_height;
00663     pt.x = sm_width >= _screen.width ? 0 : Clamp(_cursor.pos.x - (sm_width >> 1), 0, _screen.width - sm_width);
00664 
00665     return pt;
00666   }
00667 
00668   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00669   {
00670     /* There is only one widget. */
00671     for (uint i = 0; i != this->paramcount; i++) SetDParam(i, this->params[i]);
00672 
00673     size->width  = min(GetStringBoundingBox(this->string_id).width, 194);
00674     size->height = GetStringHeight(this->string_id, size->width);
00675 
00676     /* Increase slightly to have some space around the box. */
00677     size->width  += 2 + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
00678     size->height += 2 + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
00679   }
00680 
00681   virtual void DrawWidget(const Rect &r, int widget) const
00682   {
00683     /* There is only one widget. */
00684     GfxFillRect(r.left, r.top, r.right, r.bottom, PC_BLACK);
00685     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, PC_LIGHT_YELLOW);
00686 
00687     for (uint arg = 0; arg < this->paramcount; arg++) {
00688       SetDParam(arg, this->params[arg]);
00689     }
00690     DrawStringMultiLine(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM, this->string_id, TC_FROMSTRING, SA_CENTER);
00691   }
00692 
00693   virtual void OnMouseLoop()
00694   {
00695     /* Always close tooltips when the cursor is not in our window. */
00696     if (!_cursor.in_window) {
00697       delete this;
00698       return;
00699     }
00700 
00701     /* We can show tooltips while dragging tools. These are shown as long as
00702      * we are dragging the tool. Normal tooltips work with hover or rmb. */
00703     switch (this->close_cond) {
00704       case TCC_RIGHT_CLICK: if (!_right_button_down) delete this; break;
00705       case TCC_LEFT_CLICK: if (!_left_button_down) delete this; break;
00706       case TCC_HOVER: if (!_mouse_hovering) delete this; break;
00707     }
00708   }
00709 };
00710 
00719 void GuiShowTooltips(Window *parent, StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_tooltip)
00720 {
00721   DeleteWindowById(WC_TOOLTIPS, 0);
00722 
00723   if (str == STR_NULL) return;
00724 
00725   new TooltipsWindow(parent, str, paramcount, params, close_tooltip);
00726 }
00727 
00728 void QueryString::HandleEditBox(Window *w, int wid)
00729 {
00730   if (w->IsWidgetGloballyFocused(wid) && this->text.HandleCaret()) {
00731     w->SetWidgetDirty(wid);
00732 
00733     /* For the OSK also invalidate the parent window */
00734     if (w->window_class == WC_OSK) w->InvalidateData();
00735   }
00736 }
00737 
00738 void QueryString::DrawEditBox(const Window *w, int wid) const
00739 {
00740   const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
00741 
00742   assert((wi->type & WWT_MASK) == WWT_EDITBOX);
00743 
00744   bool rtl = _current_text_dir == TD_RTL;
00745   Dimension sprite_size = GetSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
00746   int clearbtn_width = sprite_size.width + WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT;
00747 
00748   int clearbtn_left  = wi->pos_x + (rtl ? 0 : wi->current_x - clearbtn_width);
00749   int clearbtn_right = wi->pos_x + (rtl ? clearbtn_width : wi->current_x) - 1;
00750   int left   = wi->pos_x + (rtl ? clearbtn_width : 0);
00751   int right  = wi->pos_x + (rtl ? wi->current_x : wi->current_x - clearbtn_width) - 1;
00752 
00753   int top    = wi->pos_y;
00754   int bottom = wi->pos_y + wi->current_y - 1;
00755 
00756   DrawFrameRect(clearbtn_left, top, clearbtn_right, bottom, wi->colour, wi->IsLowered() ? FR_LOWERED : FR_NONE);
00757   DrawSprite(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT, PAL_NONE, clearbtn_left + WD_IMGBTN_LEFT + (wi->IsLowered() ? 1 : 0), (top + bottom - sprite_size.height) / 2 + (wi->IsLowered() ? 1 : 0));
00758   if (this->text.bytes == 1) GfxFillRect(clearbtn_left + 1, top + 1, clearbtn_right - 1, bottom - 1, _colour_gradient[wi->colour & 0xF][2], FILLRECT_CHECKER);
00759 
00760   DrawFrameRect(left, top, right, bottom, wi->colour, FR_LOWERED | FR_DARKENED);
00761   GfxFillRect(left + 1, top + 1, right - 1, bottom - 1, PC_BLACK);
00762 
00763   /* Limit the drawing of the string inside the widget boundaries */
00764   DrawPixelInfo dpi;
00765   if (!FillDrawPixelInfo(&dpi, left + WD_FRAMERECT_LEFT, top + WD_FRAMERECT_TOP, right - left - WD_FRAMERECT_RIGHT, bottom - top - WD_FRAMERECT_BOTTOM)) return;
00766 
00767   DrawPixelInfo *old_dpi = _cur_dpi;
00768   _cur_dpi = &dpi;
00769 
00770   /* We will take the current widget length as maximum width, with a small
00771    * space reserved at the end for the caret to show */
00772   const Textbuf *tb = &this->text;
00773   int delta = min(0, (right - left) - tb->pixels - 10);
00774 
00775   if (tb->caretxoffs + delta < 0) delta = -tb->caretxoffs;
00776 
00777   DrawString(delta, tb->pixels, 0, tb->buf, TC_YELLOW);
00778   bool focussed = w->IsWidgetGloballyFocused(wid) || IsOSKOpenedFor(w, wid);
00779   if (focussed && tb->caret) {
00780     int caret_width = GetStringBoundingBox("_").width;
00781     DrawString(tb->caretxoffs + delta, tb->caretxoffs + delta + caret_width, 0, "_", TC_WHITE);
00782   }
00783 
00784   _cur_dpi = old_dpi;
00785 }
00786 
00787 void QueryString::ClickEditBox(Window *w, Point pt, int wid, int click_count, bool focus_changed)
00788 {
00789   const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
00790 
00791   assert((wi->type & WWT_MASK) == WWT_EDITBOX);
00792 
00793   bool rtl = _current_text_dir == TD_RTL;
00794   int clearbtn_width = GetSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT).width;
00795 
00796   int clearbtn_left  = wi->pos_x + (rtl ? 0 : wi->current_x - clearbtn_width);
00797 
00798   if (IsInsideBS(pt.x, clearbtn_left, clearbtn_width)) {
00799     if (this->text.bytes > 1) {
00800       this->text.DeleteAll();
00801       w->HandleButtonClick(wid);
00802       w->OnEditboxChanged(wid);
00803     }
00804     return;
00805   }
00806 
00807   if (w->window_class != WC_OSK && _settings_client.gui.osk_activation != OSKA_DISABLED &&
00808     (!focus_changed || _settings_client.gui.osk_activation == OSKA_IMMEDIATELY) &&
00809     (click_count == 2 || _settings_client.gui.osk_activation != OSKA_DOUBLE_CLICK)) {
00810     /* Open the OSK window */
00811     ShowOnScreenKeyboard(w, wid);
00812   }
00813 }
00814 
00816 struct QueryStringWindow : public Window
00817 {
00818   QueryString editbox;    
00819   QueryStringFlags flags; 
00820 
00821   QueryStringWindow(StringID str, StringID caption, uint max_bytes, uint max_chars, WindowDesc *desc, Window *parent, CharSetFilter afilter, QueryStringFlags flags) :
00822       Window(desc), editbox(max_bytes, max_chars)
00823   {
00824     char *last_of = &this->editbox.text.buf[this->editbox.text.max_bytes - 1];
00825     GetString(this->editbox.text.buf, str, last_of);
00826     str_validate(this->editbox.text.buf, last_of, SVS_NONE);
00827 
00828     /* Make sure the name isn't too long for the text buffer in the number of
00829      * characters (not bytes). max_chars also counts the '\0' characters. */
00830     while (Utf8StringLength(this->editbox.text.buf) + 1 > this->editbox.text.max_chars) {
00831       *Utf8PrevChar(this->editbox.text.buf + strlen(this->editbox.text.buf)) = '\0';
00832     }
00833 
00834     this->editbox.text.UpdateSize();
00835 
00836     if ((flags & QSF_ACCEPT_UNCHANGED) == 0) this->editbox.orig = strdup(this->editbox.text.buf);
00837 
00838     this->querystrings[WID_QS_TEXT] = &this->editbox;
00839     this->editbox.caption = caption;
00840     this->editbox.cancel_button = WID_QS_CANCEL;
00841     this->editbox.ok_button = WID_QS_OK;
00842     this->editbox.text.afilter = afilter;
00843     this->flags = flags;
00844 
00845     this->InitNested(WN_QUERY_STRING);
00846 
00847     this->parent = parent;
00848 
00849     this->SetFocusedWidget(WID_QS_TEXT);
00850   }
00851 
00852   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00853   {
00854     if (widget == WID_QS_DEFAULT && (this->flags & QSF_ENABLE_DEFAULT) == 0) {
00855       /* We don't want this widget to show! */
00856       fill->width = 0;
00857       resize->width = 0;
00858       size->width = 0;
00859     }
00860   }
00861 
00862   virtual void SetStringParameters(int widget) const
00863   {
00864     if (widget == WID_QS_CAPTION) SetDParam(0, this->editbox.caption);
00865   }
00866 
00867   void OnOk()
00868   {
00869     if (this->editbox.orig == NULL || strcmp(this->editbox.text.buf, this->editbox.orig) != 0) {
00870       /* If the parent is NULL, the editbox is handled by general function
00871        * HandleOnEditText */
00872       if (this->parent != NULL) {
00873         this->parent->OnQueryTextFinished(this->editbox.text.buf);
00874       } else {
00875         HandleOnEditText(this->editbox.text.buf);
00876       }
00877       this->editbox.handled = true;
00878     }
00879   }
00880 
00881   virtual void OnClick(Point pt, int widget, int click_count)
00882   {
00883     switch (widget) {
00884       case WID_QS_DEFAULT:
00885         this->editbox.text.DeleteAll();
00886         /* FALL THROUGH */
00887       case WID_QS_OK:
00888         this->OnOk();
00889         /* FALL THROUGH */
00890       case WID_QS_CANCEL:
00891         delete this;
00892         break;
00893     }
00894   }
00895 
00896   ~QueryStringWindow()
00897   {
00898     if (!this->editbox.handled && this->parent != NULL) {
00899       Window *parent = this->parent;
00900       this->parent = NULL; // so parent doesn't try to delete us again
00901       parent->OnQueryTextFinished(NULL);
00902     }
00903   }
00904 };
00905 
00906 static const NWidgetPart _nested_query_string_widgets[] = {
00907   NWidget(NWID_HORIZONTAL),
00908     NWidget(WWT_CLOSEBOX, COLOUR_GREY),
00909     NWidget(WWT_CAPTION, COLOUR_GREY, WID_QS_CAPTION), SetDataTip(STR_WHITE_STRING, STR_NULL),
00910   EndContainer(),
00911   NWidget(WWT_PANEL, COLOUR_GREY),
00912     NWidget(WWT_EDITBOX, COLOUR_GREY, WID_QS_TEXT), SetMinimalSize(256, 12), SetFill(1, 1), SetPadding(2, 2, 2, 2),
00913   EndContainer(),
00914   NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
00915     NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_DEFAULT), SetMinimalSize(87, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_DEFAULT, STR_NULL),
00916     NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_CANCEL), SetMinimalSize(86, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_CANCEL, STR_NULL),
00917     NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_OK), SetMinimalSize(87, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_OK, STR_NULL),
00918   EndContainer(),
00919 };
00920 
00921 static WindowDesc _query_string_desc(
00922   WDP_CENTER, "query_string", 0, 0,
00923   WC_QUERY_STRING, WC_NONE,
00924   0,
00925   _nested_query_string_widgets, lengthof(_nested_query_string_widgets)
00926 );
00927 
00938 void ShowQueryString(StringID str, StringID caption, uint maxsize, Window *parent, CharSetFilter afilter, QueryStringFlags flags)
00939 {
00940   DeleteWindowByClass(WC_QUERY_STRING);
00941   new QueryStringWindow(str, caption, ((flags & QSF_LEN_IN_CHARS) ? MAX_CHAR_LENGTH : 1) * maxsize, maxsize, &_query_string_desc, parent, afilter, flags);
00942 }
00943 
00947 struct QueryWindow : public Window {
00948   QueryCallbackProc *proc; 
00949   uint64 params[10];       
00950   StringID message;        
00951   StringID caption;        
00952 
00953   QueryWindow(WindowDesc *desc, StringID caption, StringID message, Window *parent, QueryCallbackProc *callback) : Window(desc)
00954   {
00955     /* Create a backup of the variadic arguments to strings because it will be
00956      * overridden pretty often. We will copy these back for drawing */
00957     CopyOutDParam(this->params, 0, lengthof(this->params));
00958     this->caption = caption;
00959     this->message = message;
00960     this->proc    = callback;
00961 
00962     this->InitNested(WN_CONFIRM_POPUP_QUERY);
00963 
00964     this->parent = parent;
00965     this->left = parent->left + (parent->width / 2) - (this->width / 2);
00966     this->top = parent->top + (parent->height / 2) - (this->height / 2);
00967   }
00968 
00969   ~QueryWindow()
00970   {
00971     if (this->proc != NULL) this->proc(this->parent, false);
00972   }
00973 
00974   virtual void SetStringParameters(int widget) const
00975   {
00976     switch (widget) {
00977       case WID_Q_CAPTION:
00978         CopyInDParam(1, this->params, lengthof(this->params));
00979         SetDParam(0, this->caption);
00980         break;
00981 
00982       case WID_Q_TEXT:
00983         CopyInDParam(0, this->params, lengthof(this->params));
00984         break;
00985     }
00986   }
00987 
00988   virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00989   {
00990     if (widget != WID_Q_TEXT) return;
00991 
00992     Dimension d = GetStringMultiLineBoundingBox(this->message, *size);
00993     d.width += WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT;
00994     d.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
00995     *size = d;
00996   }
00997 
00998   virtual void DrawWidget(const Rect &r, int widget) const
00999   {
01000     if (widget != WID_Q_TEXT) return;
01001 
01002     DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
01003         this->message, TC_FROMSTRING, SA_CENTER);
01004   }
01005 
01006   virtual void OnClick(Point pt, int widget, int click_count)
01007   {
01008     switch (widget) {
01009       case WID_Q_YES: {
01010         /* in the Generate New World window, clicking 'Yes' causes
01011          * DeleteNonVitalWindows() to be called - we shouldn't be in a window then */
01012         QueryCallbackProc *proc = this->proc;
01013         Window *parent = this->parent;
01014         /* Prevent the destructor calling the callback function */
01015         this->proc = NULL;
01016         delete this;
01017         if (proc != NULL) {
01018           proc(parent, true);
01019           proc = NULL;
01020         }
01021         break;
01022       }
01023       case WID_Q_NO:
01024         delete this;
01025         break;
01026     }
01027   }
01028 
01029   virtual EventState OnKeyPress(uint16 key, uint16 keycode)
01030   {
01031     /* ESC closes the window, Enter confirms the action */
01032     switch (keycode) {
01033       case WKC_RETURN:
01034       case WKC_NUM_ENTER:
01035         if (this->proc != NULL) {
01036           this->proc(this->parent, true);
01037           this->proc = NULL;
01038         }
01039         /* FALL THROUGH */
01040       case WKC_ESC:
01041         delete this;
01042         return ES_HANDLED;
01043     }
01044     return ES_NOT_HANDLED;
01045   }
01046 };
01047 
01048 static const NWidgetPart _nested_query_widgets[] = {
01049   NWidget(NWID_HORIZONTAL),
01050     NWidget(WWT_CLOSEBOX, COLOUR_RED),
01051     NWidget(WWT_CAPTION, COLOUR_RED, WID_Q_CAPTION), SetDataTip(STR_JUST_STRING, STR_NULL),
01052   EndContainer(),
01053   NWidget(WWT_PANEL, COLOUR_RED), SetPIP(8, 15, 8),
01054     NWidget(WWT_TEXT, COLOUR_RED, WID_Q_TEXT), SetMinimalSize(200, 12),
01055     NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(20, 29, 20),
01056       NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_Q_NO), SetMinimalSize(71, 12), SetDataTip(STR_QUIT_NO, STR_NULL),
01057       NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_Q_YES), SetMinimalSize(71, 12), SetDataTip(STR_QUIT_YES, STR_NULL),
01058     EndContainer(),
01059   EndContainer(),
01060 };
01061 
01062 static WindowDesc _query_desc(
01063   WDP_CENTER, NULL, 0, 0,
01064   WC_CONFIRM_POPUP_QUERY, WC_NONE,
01065   WDF_MODAL,
01066   _nested_query_widgets, lengthof(_nested_query_widgets)
01067 );
01068 
01078 void ShowQuery(StringID caption, StringID message, Window *parent, QueryCallbackProc *callback)
01079 {
01080   if (parent == NULL) parent = FindWindowById(WC_MAIN_WINDOW, 0);
01081 
01082   const Window *w;
01083   FOR_ALL_WINDOWS_FROM_BACK(w) {
01084     if (w->window_class != WC_CONFIRM_POPUP_QUERY) continue;
01085 
01086     const QueryWindow *qw = (const QueryWindow *)w;
01087     if (qw->parent != parent || qw->proc != callback) continue;
01088 
01089     delete qw;
01090     break;
01091   }
01092 
01093   new QueryWindow(&_query_desc, caption, message, parent, callback);
01094 }