src/signs_gui.cpp

   1 /* $Id: signs_gui.cpp 25918 2013-10-28 10:05:00Z frosch $ */
   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 signs_gui.cpp The GUI for signs. */
  11
  12 #include "stdafx.h"
  13 #include "company_gui.h"
  14 #include "company_func.h"
  15 #include "signs_base.h"
  16 #include "signs_func.h"
  17 #include "debug.h"
  18 #include "command_func.h"
  19 #include "strings_func.h"
  20 #include "window_func.h"
  21 #include "map_func.h"
  22 #include "viewport_func.h"
  23 #include "querystring_gui.h"
  24 #include "sortlist_type.h"
  25 #include "stringfilter_type.h"
  26 #include "string_func.h"
  27 #include "core/geometry_func.hpp"
  28 #include "hotkeys.h"
  29 #include "transparency.h"
  30
  31 #include "widgets/sign_widget.h"
  32
  33 #include "table/strings.h"
  34 #include "table/sprites.h"
  35
  36 #include "safeguards.h"
  37
  38 struct SignList {
  39         /**
  40          * A GUIList contains signs and uses a StringFilter for filtering.
  41          */
  42         typedef GUIList<const Sign *, StringFilter &> GUISignList;
  43
  44         static const Sign *last_sign;
  45         GUISignList signs;
  46
  47         StringFilter string_filter;                                       ///< The match string to be used when the GUIList is (re)-sorted.
  48         static bool match_case;                                           ///< Should case sensitive matching be used?
  49
  50         /**
  51          * Creates a SignList with filtering disabled by default.
  52          */
  53         SignList() : string_filter(&match_case)
  54         {
  55         }
  56
  57         void BuildSignsList()
  58         {
  59                 if (!this->signs.NeedRebuild()) return;
  60
  61                 DEBUG(misc, 3, "Building sign list");
  62
  63                 this->signs.Clear();
  64
  65                 const Sign *si;
  66                 FOR_ALL_SIGNS(si) *this->signs.Append() = si;
  67
  68                 this->signs.SetFilterState(true);
  69                 this->FilterSignList();
  70                 this->signs.Compact();
  71                 this->signs.RebuildDone();
  72         }
  73
  74         /** Sort signs by their name */
  75         static int CDECL SignNameSorter(const Sign * const *a, const Sign * const *b)
  76         {
  77                 static char buf_cache[64];
  78                 char buf[64];
  79
  80                 SetDParam(0, (*a)->index);
  81                 GetString(buf, STR_SIGN_NAME, lastof(buf));
  82
  83                 if (*b != last_sign) {
  84                         last_sign = *b;
  85                         SetDParam(0, (*b)->index);
  86                         GetString(buf_cache, STR_SIGN_NAME, lastof(buf_cache));
  87                 }
  88
  89                 int r = strnatcmp(buf, buf_cache); // Sort by name (natural sorting).
  90
  91                 return r != 0 ? r : ((*a)->index - (*b)->index);
  92         }
  93
  94         void SortSignsList()
  95         {
  96                 if (!this->signs.Sort(&SignNameSorter)) return;
  97
  98                 /* Reset the name sorter sort cache */
  99                 this->last_sign = NULL;
 100         }
 101
 102         /** Filter sign list by sign name */
 103         static bool CDECL SignNameFilter(const Sign * const *a, StringFilter &filter)
 104         {
 105                 /* Get sign string */
 106                 char buf1[MAX_LENGTH_SIGN_NAME_CHARS * MAX_CHAR_LENGTH];
 107                 SetDParam(0, (*a)->index);
 108                 GetString(buf1, STR_SIGN_NAME, lastof(buf1));
 109
 110                 filter.ResetState();
 111                 filter.AddLine(buf1);
 112                 return filter.GetState();
 113         }
 114
 115         /** Filter sign list excluding OWNER_DEITY */
 116         static bool CDECL OwnerDeityFilter(const Sign * const *a, StringFilter &filter)
 117         {
 118                 /* You should never be able to edit signs of owner DEITY */
 119                 return (*a)->owner != OWNER_DEITY;
 120         }
 121
 122         /** Filter sign list by owner */
 123         static bool CDECL OwnerVisibilityFilter(const Sign * const *a, StringFilter &filter)
 124         {
 125                 assert(!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS));
 126                 /* Hide sign if non-own signs are hidden in the viewport */
 127                 return (*a)->owner == _local_company || (*a)->owner == OWNER_DEITY;
 128         }
 129
 130         /** Filter out signs from the sign list that does not match the name filter */
 131         void FilterSignList()
 132         {
 133                 this->signs.Filter(&SignNameFilter, this->string_filter);
 134                 if (_game_mode != GM_EDITOR) this->signs.Filter(&OwnerDeityFilter, this->string_filter);
 135                 if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS)) {
 136                         this->signs.Filter(&OwnerVisibilityFilter, this->string_filter);
 137                 }
 138         }
 139 };
 140
 141 const Sign *SignList::last_sign = NULL;
 142 bool SignList::match_case = false;
 143
 144 /** Enum referring to the Hotkeys in the sign list window */
 145 enum SignListHotkeys {
 146         SLHK_FOCUS_FILTER_BOX, ///< Focus the edit box for editing the filter string
 147 };
 148
 149 struct SignListWindow : Window, SignList {
 150         QueryString filter_editbox; ///< Filter editbox;
 151         int text_offset; ///< Offset of the sign text relative to the left edge of the WID_SIL_LIST widget.
 152         Scrollbar *vscroll;
 153
 154         SignListWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc), filter_editbox(MAX_LENGTH_SIGN_NAME_CHARS * MAX_CHAR_LENGTH, MAX_LENGTH_SIGN_NAME_CHARS)
 155         {
 156                 this->CreateNestedTree();
 157                 this->vscroll = this->GetScrollbar(WID_SIL_SCROLLBAR);
 158                 this->FinishInitNested(window_number);
 159                 this->SetWidgetLoweredState(WID_SIL_FILTER_MATCH_CASE_BTN, SignList::match_case);
 160
 161                 /* Initialize the text edit widget */
 162                 this->querystrings[WID_SIL_FILTER_TEXT] = &this->filter_editbox;
 163                 this->filter_editbox.cancel_button = QueryString::ACTION_CLEAR;
 164
 165                 /* Initialize the filtering variables */
 166                 this->SetFilterString("");
 167
 168                 /* Create initial list. */
 169                 this->signs.ForceRebuild();
 170                 this->signs.ForceResort();
 171                 this->BuildSortSignList();
 172         }
 173
 174         /**
 175          * This function sets the filter string of the sign list. The contents of
 176          * the edit widget is not updated by this function. Depending on if the
 177          * new string is zero-length or not the clear button is made
 178          * disabled/enabled. The sign list is updated according to the new filter.
 179          */
 180         void SetFilterString(const char *new_filter_string)
 181         {
 182                 /* check if there is a new filter string */
 183                 this->string_filter.SetFilterTerm(new_filter_string);
 184
 185                 /* Rebuild the list of signs */
 186                 this->InvalidateData();
 187         }
 188
 189         virtual void OnPaint()
 190         {
 191                 if (this->signs.NeedRebuild()) this->BuildSortSignList();
 192                 this->DrawWidgets();
 193         }
 194
 195         virtual void DrawWidget(const Rect &r, int widget) const
 196         {
 197                 switch (widget) {
 198                         case WID_SIL_LIST: {
 199                                 uint y = r.top + WD_FRAMERECT_TOP; // Offset from top of widget.
 200                                 /* No signs? */
 201                                 if (this->vscroll->GetCount() == 0) {
 202                                         DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_STATION_LIST_NONE);
 203                                         return;
 204                                 }
 205
 206                                 bool rtl = _current_text_dir == TD_RTL;
 207                                 int sprite_offset_y = (FONT_HEIGHT_NORMAL - 10) / 2 + 1;
 208                                 uint icon_left  = 4 + (rtl ? r.right - this->text_offset : r.left);
 209                                 uint text_left  = r.left + (rtl ? WD_FRAMERECT_LEFT : this->text_offset);
 210                                 uint text_right = r.right - (rtl ? this->text_offset : WD_FRAMERECT_RIGHT);
 211
 212                                 /* At least one sign available. */
 213                                 for (uint16 i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < this->vscroll->GetCount(); i++) {
 214                                         const Sign *si = this->signs[i];
 215
 216                                         if (si->owner != OWNER_NONE) DrawCompanyIcon(si->owner, icon_left, y + sprite_offset_y);
 217
 218                                         SetDParam(0, si->index);
 219                                         DrawString(text_left, text_right, y, STR_SIGN_NAME, TC_YELLOW);
 220                                         y += this->resize.step_height;
 221                                 }
 222                                 break;
 223                         }
 224                 }
 225         }
 226
 227         virtual void SetStringParameters(int widget) const
 228         {
 229                 if (widget == WID_SIL_CAPTION) SetDParam(0, this->vscroll->GetCount());
 230         }
 231
 232         virtual void OnClick(Point pt, int widget, int click_count)
 233         {
 234                 switch (widget) {
 235                         case WID_SIL_LIST: {
 236                                 uint id_v = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_SIL_LIST, WD_FRAMERECT_TOP);
 237                                 if (id_v == INT_MAX) return;
 238
 239                                 const Sign *si = this->signs[id_v];
 240                                 ScrollMainWindowToTile(TileVirtXY(si->x, si->y));
 241                                 break;
 242                         }
 243
 244                         case WID_SIL_FILTER_ENTER_BTN:
 245                                 if (this->signs.Length() >= 1) {
 246                                         const Sign *si = this->signs[0];
 247                                         ScrollMainWindowToTile(TileVirtXY(si->x, si->y));
 248                                 }
 249                                 break;
 250
 251                         case WID_SIL_FILTER_MATCH_CASE_BTN:
 252                                 SignList::match_case = !SignList::match_case; // Toggle match case
 253                                 this->SetWidgetLoweredState(WID_SIL_FILTER_MATCH_CASE_BTN, SignList::match_case); // Toggle button pushed state
 254                                 this->InvalidateData(); // Rebuild the list of signs
 255                                 break;
 256                 }
 257         }
 258
 259         virtual void OnResize()
 260         {
 261                 this->vscroll->SetCapacityFromWidget(this, WID_SIL_LIST, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM);
 262         }
 263
 264         virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
 265         {
 266                 switch (widget) {
 267                         case WID_SIL_LIST: {
 268                                 Dimension spr_dim = GetSpriteSize(SPR_COMPANY_ICON);
 269                                 this->text_offset = WD_FRAMETEXT_LEFT + spr_dim.width + 2; // 2 pixels space between icon and the sign text.
 270                                 resize->height = max<uint>(FONT_HEIGHT_NORMAL, spr_dim.height);
 271                                 Dimension d = {(uint)(this->text_offset + WD_FRAMETEXT_RIGHT), WD_FRAMERECT_TOP + 5 * resize->height + WD_FRAMERECT_BOTTOM};
 272                                 *size = maxdim(*size, d);
 273                                 break;
 274                         }
 275
 276                         case WID_SIL_CAPTION:
 277                                 SetDParamMaxValue(0, Sign::GetPoolSize(), 3);
 278                                 *size = GetStringBoundingBox(STR_SIGN_LIST_CAPTION);
 279                                 size->height += padding.height;
 280                                 size->width  += padding.width;
 281                                 break;
 282                 }
 283         }
 284
 285         virtual EventState OnHotkey(int hotkey)
 286         {
 287                 switch (hotkey) {
 288                         case SLHK_FOCUS_FILTER_BOX:
 289                                 this->SetFocusedWidget(WID_SIL_FILTER_TEXT);
 290                                 SetFocusedWindow(this); // The user has asked to give focus to the text box, so make sure this window is focused.
 291                                 break;
 292
 293                         default:
 294                                 return ES_NOT_HANDLED;
 295                 }
 296
 297                 return ES_HANDLED;
 298         }
 299
 300         virtual void OnEditboxChanged(int widget)
 301         {
 302                 if (widget == WID_SIL_FILTER_TEXT) this->SetFilterString(this->filter_editbox.text.buf);
 303         }
 304
 305         void BuildSortSignList()
 306         {
 307                 if (this->signs.NeedRebuild()) {
 308                         this->BuildSignsList();
 309                         this->vscroll->SetCount(this->signs.Length());
 310                         this->SetWidgetDirty(WID_SIL_CAPTION);
 311                 }
 312                 this->SortSignsList();
 313         }
 314
 315         virtual void OnHundredthTick()
 316         {
 317                 this->BuildSortSignList();
 318                 this->SetDirty();
 319         }
 320
 321         /**
 322          * Some data on this window has become invalid.
 323          * @param data Information about the changed data.
 324          * @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.
 325          */
 326         virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
 327         {
 328                 /* When there is a filter string, we always need to rebuild the list even if
 329                  * the amount of signs in total is unchanged, as the subset of signs that is
 330                  * accepted by the filter might has changed. */
 331                 if (data == 0 || data == -1 || !this->string_filter.IsEmpty()) { // New or deleted sign, changed visibility setting or there is a filter string
 332                         /* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
 333                         this->signs.ForceRebuild();
 334                 } else { // Change of sign contents while there is no filter string
 335                         this->signs.ForceResort();
 336                 }
 337         }
 338
 339         static HotkeyList hotkeys;
 340 };
 341
 342 /**
 343  * Handler for global hotkeys of the SignListWindow.
 344  * @param hotkey Hotkey
 345  * @return ES_HANDLED if hotkey was accepted.
 346  */
 347 static EventState SignListGlobalHotkeys(int hotkey)
 348 {
 349         if (_game_mode == GM_MENU) return ES_NOT_HANDLED;
 350         Window *w = ShowSignList();
 351         if (w == NULL) return ES_NOT_HANDLED;
 352         return w->OnHotkey(hotkey);
 353 }
 354
 355 static Hotkey signlist_hotkeys[] = {
 356         Hotkey('F', "focus_filter_box", SLHK_FOCUS_FILTER_BOX),
 357         HOTKEY_LIST_END
 358 };
 359 HotkeyList SignListWindow::hotkeys("signlist", signlist_hotkeys, SignListGlobalHotkeys);
 360
 361 static const NWidgetPart _nested_sign_list_widgets[] = {
 362         NWidget(NWID_HORIZONTAL),
 363                 NWidget(WWT_CLOSEBOX, COLOUR_GREY),
 364                 NWidget(WWT_CAPTION, COLOUR_GREY, WID_SIL_CAPTION), SetDataTip(STR_SIGN_LIST_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 365                 NWidget(WWT_SHADEBOX, COLOUR_GREY),
 366                 NWidget(WWT_DEFSIZEBOX, COLOUR_GREY),
 367                 NWidget(WWT_STICKYBOX, COLOUR_GREY),
 368         EndContainer(),
 369         NWidget(NWID_HORIZONTAL),
 370                 NWidget(NWID_VERTICAL),
 371                         NWidget(WWT_PANEL, COLOUR_GREY, WID_SIL_LIST), SetMinimalSize(WD_FRAMETEXT_LEFT + 16 + 255 + WD_FRAMETEXT_RIGHT, 50),
 372                                                                 SetResize(1, 10), SetFill(1, 0), SetScrollbar(WID_SIL_SCROLLBAR), EndContainer(),
 373                         NWidget(NWID_HORIZONTAL),
 374                                 NWidget(WWT_PANEL, COLOUR_GREY), SetFill(1, 1),
 375                                         NWidget(WWT_EDITBOX, COLOUR_GREY, WID_SIL_FILTER_TEXT), SetMinimalSize(80, 12), SetResize(1, 0), SetFill(1, 0), SetPadding(2, 2, 2, 2),
 376                                                         SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
 377                                 EndContainer(),
 378                                 NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_SIL_FILTER_MATCH_CASE_BTN), SetDataTip(STR_SIGN_LIST_MATCH_CASE, STR_SIGN_LIST_MATCH_CASE_TOOLTIP),
 379                         EndContainer(),
 380                 EndContainer(),
 381                 NWidget(NWID_VERTICAL),
 382                         NWidget(NWID_VERTICAL), SetFill(0, 1),
 383                                 NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_SIL_SCROLLBAR),
 384                         EndContainer(),
 385                         NWidget(WWT_RESIZEBOX, COLOUR_GREY),
 386                 EndContainer(),
 387         EndContainer(),
 388 };
 389
 390 static WindowDesc _sign_list_desc(
 391         WDP_AUTO, "list_signs", 358, 138,
 392         WC_SIGN_LIST, WC_NONE,
 393         0,
 394         _nested_sign_list_widgets, lengthof(_nested_sign_list_widgets),
 395         &SignListWindow::hotkeys
 396 );
 397
 398 /**
 399  * Open the sign list window
 400  *
 401  * @return newly opened sign list window, or NULL if the window could not be opened.
 402  */
 403 Window *ShowSignList()
 404 {
 405         return AllocateWindowDescFront<SignListWindow>(&_sign_list_desc, 0);
 406 }
 407
 408 /**
 409  * Actually rename the sign.
 410  * @param index the sign to rename.
 411  * @param text  the new name.
 412  * @return true if the window will already be removed after returning.
 413  */
 414 static bool RenameSign(SignID index, const char *text)
 415 {
 416         bool remove = StrEmpty(text);
 417         DoCommandP(0, index, 0, CMD_RENAME_SIGN | (StrEmpty(text) ? CMD_MSG(STR_ERROR_CAN_T_DELETE_SIGN) : CMD_MSG(STR_ERROR_CAN_T_CHANGE_SIGN_NAME)), NULL, text);
 418         return remove;
 419 }
 420
 421 struct SignWindow : Window, SignList {
 422         QueryString name_editbox;
 423         SignID cur_sign;
 424
 425         SignWindow(WindowDesc *desc, const Sign *si) : Window(desc), name_editbox(MAX_LENGTH_SIGN_NAME_CHARS * MAX_CHAR_LENGTH, MAX_LENGTH_SIGN_NAME_CHARS)
 426         {
 427                 this->querystrings[WID_QES_TEXT] = &this->name_editbox;
 428                 this->name_editbox.caption = STR_EDIT_SIGN_CAPTION;
 429                 this->name_editbox.cancel_button = WID_QES_CANCEL;
 430                 this->name_editbox.ok_button = WID_QES_OK;
 431
 432                 this->InitNested(WN_QUERY_STRING_SIGN);
 433
 434                 UpdateSignEditWindow(si);
 435                 this->SetFocusedWidget(WID_QES_TEXT);
 436         }
 437
 438         void UpdateSignEditWindow(const Sign *si)
 439         {
 440                 /* Display an empty string when the sign hasn't been edited yet */
 441                 if (si->name != NULL) {
 442                         SetDParam(0, si->index);
 443                         this->name_editbox.text.Assign(STR_SIGN_NAME);
 444                 } else {
 445                         this->name_editbox.text.DeleteAll();
 446                 }
 447
 448                 this->cur_sign = si->index;
 449
 450                 this->SetWidgetDirty(WID_QES_TEXT);
 451                 this->SetFocusedWidget(WID_QES_TEXT);
 452         }
 453
 454         /**
 455          * Returns a pointer to the (alphabetically) previous or next sign of the current sign.
 456          * @param next false if the previous sign is wanted, true if the next sign is wanted
 457          * @return pointer to the previous/next sign
 458          */
 459         const Sign *PrevNextSign(bool next)
 460         {
 461                 /* Rebuild the sign list */
 462                 this->signs.ForceRebuild();
 463                 this->signs.NeedResort();
 464                 this->BuildSignsList();
 465                 this->SortSignsList();
 466
 467                 /* Search through the list for the current sign, excluding
 468                  * - the first sign if we want the previous sign or
 469                  * - the last sign if we want the next sign */
 470                 uint end = this->signs.Length() - (next ? 1 : 0);
 471                 for (uint i = next ? 0 : 1; i < end; i++) {
 472                         if (this->cur_sign == this->signs[i]->index) {
 473                                 /* We've found the current sign, so return the sign before/after it */
 474                                 return this->signs[i + (next ? 1 : -1)];
 475                         }
 476                 }
 477                 /* If we haven't found the current sign by now, return the last/first sign */
 478                 return this->signs[next ? 0 : this->signs.Length() - 1];
 479         }
 480
 481         virtual void SetStringParameters(int widget) const
 482         {
 483                 switch (widget) {
 484                         case WID_QES_CAPTION:
 485                                 SetDParam(0, this->name_editbox.caption);
 486                                 break;
 487                 }
 488         }
 489
 490         virtual void OnClick(Point pt, int widget, int click_count)
 491         {
 492                 switch (widget) {
 493                         case WID_QES_PREVIOUS:
 494                         case WID_QES_NEXT: {
 495                                 const Sign *si = this->PrevNextSign(widget == WID_QES_NEXT);
 496
 497                                 /* Rebuild the sign list */
 498                                 this->signs.ForceRebuild();
 499                                 this->signs.NeedResort();
 500                                 this->BuildSignsList();
 501                                 this->SortSignsList();
 502
 503                                 /* Scroll to sign and reopen window */
 504                                 ScrollMainWindowToTile(TileVirtXY(si->x, si->y));
 505                                 UpdateSignEditWindow(si);
 506                                 break;
 507                         }
 508
 509                         case WID_QES_DELETE:
 510                                 /* Only need to set the buffer to null, the rest is handled as the OK button */
 511                                 RenameSign(this->cur_sign, "");
 512                                 /* don't delete this, we are deleted in Sign::~Sign() -> DeleteRenameSignWindow() */
 513                                 break;
 514
 515                         case WID_QES_OK:
 516                                 if (RenameSign(this->cur_sign, this->name_editbox.text.buf)) break;
 517                                 FALLTHROUGH;
 518
 519                         case WID_QES_CANCEL:
 520                                 delete this;
 521                                 break;
 522                 }
 523         }
 524 };
 525
 526 static const NWidgetPart _nested_query_sign_edit_widgets[] = {
 527         NWidget(NWID_HORIZONTAL),
 528                 NWidget(WWT_CLOSEBOX, COLOUR_GREY),
 529                 NWidget(WWT_CAPTION, COLOUR_GREY, WID_QES_CAPTION), SetDataTip(STR_WHITE_STRING, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 530         EndContainer(),
 531         NWidget(WWT_PANEL, COLOUR_GREY),
 532                 NWidget(WWT_EDITBOX, COLOUR_GREY, WID_QES_TEXT), SetMinimalSize(256, 12), SetDataTip(STR_EDIT_SIGN_SIGN_OSKTITLE, STR_NULL), SetPadding(2, 2, 2, 2),
 533         EndContainer(),
 534         NWidget(NWID_HORIZONTAL),
 535                 NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_QES_OK), SetMinimalSize(61, 12), SetDataTip(STR_BUTTON_OK, STR_NULL),
 536                 NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_QES_CANCEL), SetMinimalSize(60, 12), SetDataTip(STR_BUTTON_CANCEL, STR_NULL),
 537                 NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_QES_DELETE), SetMinimalSize(60, 12), SetDataTip(STR_TOWN_VIEW_DELETE_BUTTON, STR_NULL),
 538                 NWidget(WWT_PANEL, COLOUR_GREY), SetFill(1, 1), EndContainer(),
 539                 NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_QES_PREVIOUS), SetMinimalSize(11, 12), SetDataTip(AWV_DECREASE, STR_EDIT_SIGN_PREVIOUS_SIGN_TOOLTIP),
 540                 NWidget(WWT_PUSHARROWBTN, COLOUR_GREY, WID_QES_NEXT), SetMinimalSize(11, 12), SetDataTip(AWV_INCREASE, STR_EDIT_SIGN_NEXT_SIGN_TOOLTIP),
 541         EndContainer(),
 542 };
 543
 544 static WindowDesc _query_sign_edit_desc(
 545         WDP_CENTER, "query_sign", 0, 0,
 546         WC_QUERY_STRING, WC_NONE,
 547         WDF_CONSTRUCTION,
 548         _nested_query_sign_edit_widgets, lengthof(_nested_query_sign_edit_widgets)
 549 );
 550
 551 /**
 552  * Handle clicking on a sign.
 553  * @param si The sign that was clicked on.
 554  */
 555 void HandleClickOnSign(const Sign *si)
 556 {
 557         if (_ctrl_pressed && (si->owner == _local_company || (si->owner == OWNER_DEITY && _game_mode == GM_EDITOR))) {
 558                 RenameSign(si->index, NULL);
 559                 return;
 560         }
 561         ShowRenameSignWindow(si);
 562 }
 563
 564 /**
 565  * Show the window to change the text of a sign.
 566  * @param si The sign to show the window for.
 567  */
 568 void ShowRenameSignWindow(const Sign *si)
 569 {
 570         /* Delete all other edit windows */
 571         DeleteWindowByClass(WC_QUERY_STRING);
 572
 573         new SignWindow(&_query_sign_edit_desc, si);
 574 }
 575
 576 /**
 577  * Close the sign window associated with the given sign.
 578  * @param sign The sign to close the window for.
 579  */
 580 void DeleteRenameSignWindow(SignID sign)
 581 {
 582         SignWindow *w = dynamic_cast<SignWindow *>(FindWindowById(WC_QUERY_STRING, WN_QUERY_STRING_SIGN));
 583
 584         if (w != NULL && w->cur_sign == sign) delete w;
 585 }