town_gui.cpp

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/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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/>.
 */
 
#include "stdafx.h"
#include "town.h"
#include "viewport_func.h"
#include "error.h"
#include "gui.h"
#include "command_func.h"
#include "company_func.h"
#include "company_base.h"
#include "company_gui.h"
#include "network/network.h"
#include "string_func.h"
#include "strings_func.h"
#include "sound_func.h"
#include "tilehighlight_func.h"
#include "sortlist_type.h"
#include "road_cmd.h"
#include "landscape.h"
#include "querystring_gui.h"
#include "window_func.h"
#include "townname_func.h"
#include "core/backup_type.hpp"
#include "core/geometry_func.hpp"
#include "genworld.h"
#include "stringfilter_type.h"
#include "widgets/dropdown_func.h"
#include "town_kdtree.h"
#include "town_cmd.h"
 
#include "widgets/town_widget.h"
 
#include "table/strings.h"
 
#include "safeguards.h"
#include "zoom_func.h"
 
TownKdtree _town_local_authority_kdtree(&Kdtree_TownXYFunc);
 
typedef GUIList<const Town*> GUITownList;
 
static const NWidgetPart _nested_town_authority_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_CAPTION, COLOUR_BROWN, WID_TA_CAPTION), SetDataTip(STR_LOCAL_AUTHORITY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_TA_ZONE_BUTTON), SetMinimalSize(50, 0), SetMinimalTextLines(1, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM + 2), SetDataTip(STR_LOCAL_AUTHORITY_ZONE, STR_LOCAL_AUTHORITY_ZONE_TOOLTIP),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN, WID_TA_RATING_INFO), SetMinimalSize(317, 92), SetResize(1, 1), EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PANEL, COLOUR_BROWN, WID_TA_COMMAND_LIST), SetMinimalSize(305, 52), SetResize(1, 0), SetDataTip(0x0, STR_LOCAL_AUTHORITY_ACTIONS_TOOLTIP), SetScrollbar(WID_TA_SCROLLBAR), EndContainer(),
    NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, WID_TA_SCROLLBAR),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN, WID_TA_ACTION_INFO), SetMinimalSize(317, 52), SetResize(1, 0), EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_BROWN, WID_TA_EXECUTE),  SetMinimalSize(317, 12), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_LOCAL_AUTHORITY_DO_IT_BUTTON, STR_LOCAL_AUTHORITY_DO_IT_TOOLTIP),
    NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
  EndContainer()
};
 
struct TownAuthorityWindow : Window {
private:
  Town *town;    
  int sel_index; 
  Scrollbar *vscroll;
  uint displayed_actions_on_previous_painting; 
 
  static int GetNthSetBit(uint32 bits, int n)
  {
    if (n >= 0) {
      for (uint i : SetBitIterator(bits)) {
        n--;
        if (n < 0) return i;
      }
    }
    return -1;
  }
 
public:
  TownAuthorityWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc), sel_index(-1), displayed_actions_on_previous_painting(0)
  {
    this->town = Town::Get(window_number);
    this->InitNested(window_number);
    this->vscroll = this->GetScrollbar(WID_TA_SCROLLBAR);
    this->vscroll->SetCapacity((this->GetWidget<NWidgetBase>(WID_TA_COMMAND_LIST)->current_y - WD_FRAMERECT_TOP - WD_FRAMERECT_BOTTOM) / FONT_HEIGHT_NORMAL);
  }
 
  void OnPaint() override
  {
    int numact;
    uint buttons = GetMaskOfTownActions(&numact, _local_company, this->town);
    if (buttons != displayed_actions_on_previous_painting) this->SetDirty();
    displayed_actions_on_previous_painting = buttons;
 
    this->vscroll->SetCount(numact + 1);
 
    if (this->sel_index != -1 && !HasBit(buttons, this->sel_index)) {
      this->sel_index = -1;
    }
 
    this->SetWidgetLoweredState(WID_TA_ZONE_BUTTON, this->town->show_zone);
    this->SetWidgetDisabledState(WID_TA_EXECUTE, this->sel_index == -1);
 
    this->DrawWidgets();
    if (!this->IsShaded()) this->DrawRatings();
  }
 
  void DrawRatings()
  {
    NWidgetBase *nwid = this->GetWidget<NWidgetBase>(WID_TA_RATING_INFO);
    uint left = nwid->pos_x + WD_FRAMERECT_LEFT;
    uint right = nwid->pos_x + nwid->current_x - 1 - WD_FRAMERECT_RIGHT;
 
    uint y = nwid->pos_y + WD_FRAMERECT_TOP;
 
    DrawString(left, right, y, STR_LOCAL_AUTHORITY_COMPANY_RATINGS);
    y += FONT_HEIGHT_NORMAL;
 
    Dimension icon_size = GetSpriteSize(SPR_COMPANY_ICON);
    int icon_width      = icon_size.width;
    int icon_y_offset   = (FONT_HEIGHT_NORMAL - icon_size.height) / 2;
 
    Dimension exclusive_size = GetSpriteSize(SPR_EXCLUSIVE_TRANSPORT);
    int exclusive_width      = exclusive_size.width;
    int exclusive_y_offset   = (FONT_HEIGHT_NORMAL - exclusive_size.height) / 2;
 
    bool rtl = _current_text_dir == TD_RTL;
    uint text_left      = left  + (rtl ? 0 : icon_width + exclusive_width + 4);
    uint text_right     = right - (rtl ? icon_width + exclusive_width + 4 : 0);
    uint icon_left      = rtl ? right - icon_width : left;
    uint exclusive_left = rtl ? right - icon_width - exclusive_width - 2 : left + icon_width + 2;
 
    /* Draw list of companies */
    for (const Company *c : Company::Iterate()) {
      if ((HasBit(this->town->have_ratings, c->index) || this->town->exclusivity == c->index)) {
        DrawCompanyIcon(c->index, icon_left, y + icon_y_offset);
 
        SetDParam(0, c->index);
        SetDParam(1, c->index);
 
        int r = this->town->ratings[c->index];
        StringID str = STR_CARGO_RATING_APPALLING;
        if (r > RATING_APPALLING) str++;
        if (r > RATING_VERYPOOR)  str++;
        if (r > RATING_POOR)      str++;
        if (r > RATING_MEDIOCRE)  str++;
        if (r > RATING_GOOD)      str++;
        if (r > RATING_VERYGOOD)  str++;
        if (r > RATING_EXCELLENT) str++;
 
        SetDParam(2, str);
        if (this->town->exclusivity == c->index) {
          DrawSprite(SPR_EXCLUSIVE_TRANSPORT, COMPANY_SPRITE_COLOUR(c->index), exclusive_left, y + exclusive_y_offset);
        }
 
        DrawString(text_left, text_right, y, STR_LOCAL_AUTHORITY_COMPANY_RATING);
        y += FONT_HEIGHT_NORMAL;
      }
    }
 
    y = y + WD_FRAMERECT_BOTTOM - nwid->pos_y; // Compute needed size of the widget.
    if (y > nwid->current_y) {
      /* If the company list is too big to fit, mark ourself dirty and draw again. */
      ResizeWindow(this, 0, y - nwid->current_y, false);
    }
  }
 
  void SetStringParameters(int widget) const override
  {
    if (widget == WID_TA_CAPTION) SetDParam(0, this->window_number);
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_TA_ACTION_INFO:
        if (this->sel_index != -1) {
          SetDParam(0, _price[PR_TOWN_ACTION] * _town_action_costs[this->sel_index] >> 8);
          DrawStringMultiLine(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
                STR_LOCAL_AUTHORITY_ACTION_TOOLTIP_SMALL_ADVERTISING + this->sel_index);
        }
        break;
      case WID_TA_COMMAND_LIST: {
        int numact;
        uint buttons = GetMaskOfTownActions(&numact, _local_company, this->town);
        int y = r.top + WD_FRAMERECT_TOP;
        int pos = this->vscroll->GetPosition();
 
        if (--pos < 0) {
          DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_LOCAL_AUTHORITY_ACTIONS_TITLE);
          y += FONT_HEIGHT_NORMAL;
        }
 
        for (int i = 0; buttons; i++, buttons >>= 1) {
          if (pos <= -5) break; 
 
          if ((buttons & 1) && --pos < 0) {
            DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y,
                STR_LOCAL_AUTHORITY_ACTION_SMALL_ADVERTISING_CAMPAIGN + i, this->sel_index == i ? TC_WHITE : TC_ORANGE);
            y += FONT_HEIGHT_NORMAL;
          }
        }
        break;
      }
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_TA_ACTION_INFO: {
        assert(size->width > padding.width && size->height > padding.height);
        size->width -= WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        size->height -= WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
        Dimension d = {0, 0};
        for (int i = 0; i < TACT_COUNT; i++) {
          SetDParam(0, _price[PR_TOWN_ACTION] * _town_action_costs[i] >> 8);
          d = maxdim(d, GetStringMultiLineBoundingBox(STR_LOCAL_AUTHORITY_ACTION_TOOLTIP_SMALL_ADVERTISING + i, *size));
        }
        *size = maxdim(*size, d);
        size->width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        size->height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
        break;
      }
 
      case WID_TA_COMMAND_LIST:
        size->height = WD_FRAMERECT_TOP + 5 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_BOTTOM;
        size->width = GetStringBoundingBox(STR_LOCAL_AUTHORITY_ACTIONS_TITLE).width;
        for (uint i = 0; i < TACT_COUNT; i++ ) {
          size->width = std::max(size->width, GetStringBoundingBox(STR_LOCAL_AUTHORITY_ACTION_SMALL_ADVERTISING_CAMPAIGN + i).width);
        }
        size->width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        break;
 
      case WID_TA_RATING_INFO:
        resize->height = FONT_HEIGHT_NORMAL;
        size->height = WD_FRAMERECT_TOP + 9 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_BOTTOM;
        break;
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_TA_ZONE_BUTTON: {
        bool new_show_state = !this->town->show_zone;
        TownID index = this->town->index;
 
        new_show_state ? _town_local_authority_kdtree.Insert(index) : _town_local_authority_kdtree.Remove(index);
 
        this->town->show_zone = new_show_state;
        this->SetWidgetLoweredState(widget, new_show_state);
        MarkWholeScreenDirty();
        break;
      }
 
      case WID_TA_COMMAND_LIST: {
        int y = this->GetRowFromWidget(pt.y, WID_TA_COMMAND_LIST, 1, FONT_HEIGHT_NORMAL);
        if (!IsInsideMM(y, 0, 5)) return;
 
        y = GetNthSetBit(GetMaskOfTownActions(nullptr, _local_company, this->town), y + this->vscroll->GetPosition() - 1);
        if (y >= 0) {
          this->sel_index = y;
          this->SetDirty();
        }
        /* When double-clicking, continue */
        if (click_count == 1 || y < 0) break;
        FALLTHROUGH;
      }
 
      case WID_TA_EXECUTE:
        Command<CMD_DO_TOWN_ACTION>::Post(STR_ERROR_CAN_T_DO_THIS, this->town->xy, this->window_number, this->sel_index);
        break;
    }
  }
 
  void OnHundredthTick() override
  {
    this->SetDirty();
  }
};
 
static WindowDesc _town_authority_desc(
  WDP_AUTO, "view_town_authority", 317, 222,
  WC_TOWN_AUTHORITY, WC_NONE,
  0,
  _nested_town_authority_widgets, lengthof(_nested_town_authority_widgets)
);
 
static void ShowTownAuthorityWindow(uint town)
{
  AllocateWindowDescFront<TownAuthorityWindow>(&_town_authority_desc, town);
}
 
 
/* Town view window. */
struct TownViewWindow : Window {
private:
  Town *town; 
 
public:
  static const int WID_TV_HEIGHT_NORMAL = 150;
 
  TownViewWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
  {
    this->CreateNestedTree();
 
    this->town = Town::Get(window_number);
    if (this->town->larger_town) this->GetWidget<NWidgetCore>(WID_TV_CAPTION)->widget_data = STR_TOWN_VIEW_CITY_CAPTION;
 
    this->FinishInitNested(window_number);
 
    this->flags |= WF_DISABLE_VP_SCROLL;
    NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_TV_VIEWPORT);
    nvp->InitializeViewport(this, this->town->xy, ScaleZoomGUI(ZOOM_LVL_TOWN));
 
    /* disable renaming town in network games if you are not the server */
    this->SetWidgetDisabledState(WID_TV_CHANGE_NAME, _networking && !_network_server);
  }
 
  void Close() override
  {
    SetViewportCatchmentTown(Town::Get(this->window_number), false);
    this->Window::Close();
  }
 
  void SetStringParameters(int widget) const override
  {
    if (widget == WID_TV_CAPTION) SetDParam(0, this->town->index);
  }
 
  void OnPaint() override
  {
    extern const Town *_viewport_highlight_town;
    this->SetWidgetLoweredState(WID_TV_CATCHMENT, _viewport_highlight_town == this->town);
 
    this->DrawWidgets();
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget != WID_TV_INFO) return;
 
    uint y = r.top + WD_FRAMERECT_TOP;
 
    SetDParam(0, this->town->cache.population);
    SetDParam(1, this->town->cache.num_houses);
    DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y, STR_TOWN_VIEW_POPULATION_HOUSES);
 
    SetDParam(0, 1 << CT_PASSENGERS);
    SetDParam(1, this->town->supplied[CT_PASSENGERS].old_act);
    SetDParam(2, this->town->supplied[CT_PASSENGERS].old_max);
    DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_CARGO_LAST_MONTH_MAX);
 
    SetDParam(0, 1 << CT_MAIL);
    SetDParam(1, this->town->supplied[CT_MAIL].old_act);
    SetDParam(2, this->town->supplied[CT_MAIL].old_max);
    DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_CARGO_LAST_MONTH_MAX);
 
    bool first = true;
    for (int i = TE_BEGIN; i < TE_END; i++) {
      if (this->town->goal[i] == 0) continue;
      if (this->town->goal[i] == TOWN_GROWTH_WINTER && (TileHeight(this->town->xy) < LowestSnowLine() || this->town->cache.population <= 90)) continue;
      if (this->town->goal[i] == TOWN_GROWTH_DESERT && (GetTropicZone(this->town->xy) != TROPICZONE_DESERT || this->town->cache.population <= 60)) continue;
 
      if (first) {
        DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH);
        first = false;
      }
 
      bool rtl = _current_text_dir == TD_RTL;
      uint cargo_text_left = r.left + WD_FRAMERECT_LEFT + (rtl ? 0 : 20);
      uint cargo_text_right = r.right - WD_FRAMERECT_RIGHT - (rtl ? 20 : 0);
 
      const CargoSpec *cargo = FindFirstCargoWithTownEffect((TownEffect)i);
      assert(cargo != nullptr);
 
      StringID string;
 
      if (this->town->goal[i] == TOWN_GROWTH_DESERT || this->town->goal[i] == TOWN_GROWTH_WINTER) {
        /* For 'original' gameplay, don't show the amount required (you need 1 or more ..) */
        string = STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH_DELIVERED_GENERAL;
        if (this->town->received[i].old_act == 0) {
          string = STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH_REQUIRED_GENERAL;
 
          if (this->town->goal[i] == TOWN_GROWTH_WINTER && TileHeight(this->town->xy) < GetSnowLine()) {
            string = STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH_REQUIRED_WINTER;
          }
        }
 
        SetDParam(0, cargo->name);
      } else {
        string = STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH_DELIVERED;
        if (this->town->received[i].old_act < this->town->goal[i]) {
          string = STR_TOWN_VIEW_CARGO_FOR_TOWNGROWTH_REQUIRED;
        }
 
        SetDParam(0, cargo->Index());
        SetDParam(1, this->town->received[i].old_act);
        SetDParam(2, cargo->Index());
        SetDParam(3, this->town->goal[i]);
      }
      DrawString(cargo_text_left, cargo_text_right, y += FONT_HEIGHT_NORMAL, string);
    }
 
    if (HasBit(this->town->flags, TOWN_IS_GROWING)) {
      SetDParam(0, RoundDivSU(this->town->growth_rate + 1, DAY_TICKS));
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, this->town->fund_buildings_months == 0 ? STR_TOWN_VIEW_TOWN_GROWS_EVERY : STR_TOWN_VIEW_TOWN_GROWS_EVERY_FUNDED);
    } else {
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_TOWN_GROW_STOPPED);
    }
 
    /* only show the town noise, if the noise option is activated. */
    if (_settings_game.economy.station_noise_level) {
      SetDParam(0, this->town->noise_reached);
      SetDParam(1, this->town->MaxTownNoise());
      DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_NOISE_IN_TOWN);
    }
 
    if (!this->town->text.empty()) {
      SetDParamStr(0, this->town->text);
      DrawStringMultiLine(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y += FONT_HEIGHT_NORMAL, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_TV_CENTER_VIEW: // scroll to location
        if (_ctrl_pressed) {
          ShowExtraViewportWindow(this->town->xy);
        } else {
          ScrollMainWindowToTile(this->town->xy);
        }
        break;
 
      case WID_TV_SHOW_AUTHORITY: // town authority
        ShowTownAuthorityWindow(this->window_number);
        break;
 
      case WID_TV_CHANGE_NAME: // rename
        SetDParam(0, this->window_number);
        ShowQueryString(STR_TOWN_NAME, STR_TOWN_VIEW_RENAME_TOWN_BUTTON, MAX_LENGTH_TOWN_NAME_CHARS, this, CS_ALPHANUMERAL, QSF_ENABLE_DEFAULT | QSF_LEN_IN_CHARS);
        break;
 
      case WID_TV_CATCHMENT:
        SetViewportCatchmentTown(Town::Get(this->window_number), !this->IsWidgetLowered(WID_TV_CATCHMENT));
        break;
 
      case WID_TV_EXPAND: { // expand town - only available on Scenario editor
        /* Warn the user if towns are not allowed to build roads, but do this only once per OpenTTD run. */
        static bool _warn_town_no_roads = false;
 
        if (!_settings_game.economy.allow_town_roads && !_warn_town_no_roads) {
          ShowErrorMessage(STR_ERROR_TOWN_EXPAND_WARN_NO_ROADS, INVALID_STRING_ID, WL_WARNING);
          _warn_town_no_roads = true;
        }
 
        Command<CMD_EXPAND_TOWN>::Post(STR_ERROR_CAN_T_EXPAND_TOWN, this->window_number, 0);
        break;
      }
 
      case WID_TV_DELETE: // delete town - only available on Scenario editor
        Command<CMD_DELETE_TOWN>::Post(STR_ERROR_TOWN_CAN_T_DELETE, this->window_number);
        break;
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_TV_INFO:
        size->height = GetDesiredInfoHeight(size->width);
        break;
    }
  }
 
  uint GetDesiredInfoHeight(int width) const
  {
    uint aimed_height = 3 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
 
    bool first = true;
    for (int i = TE_BEGIN; i < TE_END; i++) {
      if (this->town->goal[i] == 0) continue;
      if (this->town->goal[i] == TOWN_GROWTH_WINTER && (TileHeight(this->town->xy) < LowestSnowLine() || this->town->cache.population <= 90)) continue;
      if (this->town->goal[i] == TOWN_GROWTH_DESERT && (GetTropicZone(this->town->xy) != TROPICZONE_DESERT || this->town->cache.population <= 60)) continue;
 
      if (first) {
        aimed_height += FONT_HEIGHT_NORMAL;
        first = false;
      }
      aimed_height += FONT_HEIGHT_NORMAL;
    }
    aimed_height += FONT_HEIGHT_NORMAL;
 
    if (_settings_game.economy.station_noise_level) aimed_height += FONT_HEIGHT_NORMAL;
 
    if (!this->town->text.empty()) {
      SetDParamStr(0, this->town->text);
      aimed_height += GetStringHeight(STR_JUST_RAW_STRING, width - WD_FRAMERECT_LEFT - WD_FRAMERECT_RIGHT);
    }
 
    return aimed_height;
  }
 
  void ResizeWindowAsNeeded()
  {
    const NWidgetBase *nwid_info = this->GetWidget<NWidgetBase>(WID_TV_INFO);
    uint aimed_height = GetDesiredInfoHeight(nwid_info->current_x);
    if (aimed_height > nwid_info->current_y || (aimed_height < nwid_info->current_y && nwid_info->current_y > nwid_info->smallest_y)) {
      this->ReInit();
    }
  }
 
  void OnResize() override
  {
    if (this->viewport != nullptr) {
      NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_TV_VIEWPORT);
      nvp->UpdateViewportCoordinates(this);
 
      ScrollWindowToTile(this->town->xy, this, true); // Re-center viewport.
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!gui_scope) return;
    /* Called when setting station noise or required cargoes have changed, in order to resize the window */
    this->SetDirty(); // refresh display for current size. This will allow to avoid glitches when downgrading
    this->ResizeWindowAsNeeded();
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (str == nullptr) return;
 
    Command<CMD_RENAME_TOWN>::Post(STR_ERROR_CAN_T_RENAME_TOWN, this->window_number, str);
  }
};
 
static const NWidgetPart _nested_town_game_view_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_PUSHIMGBTN, COLOUR_BROWN, WID_TV_CHANGE_NAME), SetMinimalSize(12, 14), SetDataTip(SPR_RENAME, STR_TOWN_VIEW_RENAME_TOOLTIP),
    NWidget(WWT_CAPTION, COLOUR_BROWN, WID_TV_CAPTION), SetDataTip(STR_TOWN_VIEW_TOWN_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_PUSHIMGBTN, COLOUR_BROWN, WID_TV_CENTER_VIEW), SetMinimalSize(12, 14), SetDataTip(SPR_GOTO_LOCATION, STR_TOWN_VIEW_CENTER_TOOLTIP),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN),
    NWidget(WWT_INSET, COLOUR_BROWN), SetPadding(2, 2, 2, 2),
      NWidget(NWID_VIEWPORT, INVALID_COLOUR, WID_TV_VIEWPORT), SetMinimalSize(254, 86), SetFill(1, 0), SetResize(1, 1),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN, WID_TV_INFO), SetMinimalSize(260, 32), SetResize(1, 0), SetFill(1, 0), EndContainer(),
  NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
    NWidget(WWT_PUSHTXTBTN, COLOUR_BROWN, WID_TV_SHOW_AUTHORITY), SetMinimalSize(80, 12), SetFill(1, 1), SetResize(1, 0), SetDataTip(STR_TOWN_VIEW_LOCAL_AUTHORITY_BUTTON, STR_TOWN_VIEW_LOCAL_AUTHORITY_TOOLTIP),
    NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_TV_CATCHMENT), SetMinimalSize(40, 12), SetFill(1, 1), SetResize(1, 0), SetDataTip(STR_BUTTON_CATCHMENT, STR_TOOLTIP_CATCHMENT),
    NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
  EndContainer(),
};
 
static WindowDesc _town_game_view_desc(
  WDP_AUTO, "view_town", 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
  WC_TOWN_VIEW, WC_NONE,
  0,
  _nested_town_game_view_widgets, lengthof(_nested_town_game_view_widgets)
);
 
static const NWidgetPart _nested_town_editor_view_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_PUSHIMGBTN, COLOUR_BROWN, WID_TV_CHANGE_NAME), SetMinimalSize(12, 14), SetDataTip(SPR_RENAME, STR_TOWN_VIEW_RENAME_TOOLTIP),
    NWidget(WWT_CAPTION, COLOUR_BROWN, WID_TV_CAPTION), SetDataTip(STR_TOWN_VIEW_TOWN_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_PUSHIMGBTN, COLOUR_BROWN, WID_TV_CENTER_VIEW), SetMinimalSize(12, 14), SetDataTip(SPR_GOTO_LOCATION, STR_TOWN_VIEW_CENTER_TOOLTIP),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN),
    NWidget(WWT_INSET, COLOUR_BROWN), SetPadding(2, 2, 2, 2),
      NWidget(NWID_VIEWPORT, INVALID_COLOUR, WID_TV_VIEWPORT), SetMinimalSize(254, 86), SetFill(1, 1), SetResize(1, 1),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_BROWN, WID_TV_INFO), SetMinimalSize(260, 32), SetResize(1, 0), SetFill(1, 0), EndContainer(),
  NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
    NWidget(WWT_PUSHTXTBTN, COLOUR_BROWN, WID_TV_EXPAND), SetMinimalSize(80, 12), SetFill(1, 1), SetResize(1, 0), SetDataTip(STR_TOWN_VIEW_EXPAND_BUTTON, STR_TOWN_VIEW_EXPAND_TOOLTIP),
    NWidget(WWT_PUSHTXTBTN, COLOUR_BROWN, WID_TV_DELETE), SetMinimalSize(80, 12), SetFill(1, 1), SetResize(1, 0), SetDataTip(STR_TOWN_VIEW_DELETE_BUTTON, STR_TOWN_VIEW_DELETE_TOOLTIP),
    NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_TV_CATCHMENT), SetMinimalSize(40, 12), SetFill(1, 1), SetResize(1, 0), SetDataTip(STR_BUTTON_CATCHMENT, STR_TOOLTIP_CATCHMENT),
    NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
  EndContainer(),
};
 
static WindowDesc _town_editor_view_desc(
  WDP_AUTO, "view_town_scen", 260, TownViewWindow::WID_TV_HEIGHT_NORMAL,
  WC_TOWN_VIEW, WC_NONE,
  0,
  _nested_town_editor_view_widgets, lengthof(_nested_town_editor_view_widgets)
);
 
void ShowTownViewWindow(TownID town)
{
  if (_game_mode == GM_EDITOR) {
    AllocateWindowDescFront<TownViewWindow>(&_town_editor_view_desc, town);
  } else {
    AllocateWindowDescFront<TownViewWindow>(&_town_game_view_desc, town);
  }
}
 
static const NWidgetPart _nested_town_directory_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_CAPTION, COLOUR_BROWN), SetDataTip(STR_TOWN_DIRECTORY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_HORIZONTAL),
        NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_TD_SORT_ORDER), SetDataTip(STR_BUTTON_SORT_BY, STR_TOOLTIP_SORT_ORDER),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_TD_SORT_CRITERIA), SetDataTip(STR_JUST_STRING, STR_TOOLTIP_SORT_CRITERIA),
        NWidget(WWT_EDITBOX, COLOUR_BROWN, WID_TD_FILTER), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
      EndContainer(),
      NWidget(WWT_PANEL, COLOUR_BROWN, WID_TD_LIST), SetDataTip(0x0, STR_TOWN_DIRECTORY_LIST_TOOLTIP),
              SetFill(1, 0), SetResize(1, 1), SetScrollbar(WID_TD_SCROLLBAR), EndContainer(),
      NWidget(WWT_PANEL, COLOUR_BROWN),
        NWidget(WWT_TEXT, COLOUR_BROWN, WID_TD_WORLD_POPULATION), SetPadding(2, 0, 2, 2), SetMinimalTextLines(1, 0), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TOWN_POPULATION, STR_NULL),
      EndContainer(),
    EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, WID_TD_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
    EndContainer(),
  EndContainer(),
};
 
struct TownDirectoryWindow : public Window {
private:
  /* Runtime saved values */
  static Listing last_sorting;
 
  /* Constants for sorting towns */
  static const StringID sorter_names[];
  static GUITownList::SortFunction * const sorter_funcs[];
 
  StringFilter string_filter;             
  QueryString townname_editbox;           
 
  GUITownList towns;
 
  Scrollbar *vscroll;
 
  void BuildSortTownList()
  {
    if (this->towns.NeedRebuild()) {
      this->towns.clear();
 
      for (const Town *t : Town::Iterate()) {
        if (this->string_filter.IsEmpty()) {
          this->towns.push_back(t);
          continue;
        }
        this->string_filter.ResetState();
        this->string_filter.AddLine(t->GetCachedName());
        if (this->string_filter.GetState()) this->towns.push_back(t);
      }
 
      this->towns.shrink_to_fit();
      this->towns.RebuildDone();
      this->vscroll->SetCount((uint)this->towns.size()); // Update scrollbar as well.
    }
    /* Always sort the towns. */
    this->towns.Sort();
    this->SetWidgetDirty(WID_TD_LIST); // Force repaint of the displayed towns.
  }
 
  static bool TownNameSorter(const Town * const &a, const Town * const &b)
  {
    return strnatcmp(a->GetCachedName(), b->GetCachedName()) < 0; // Sort by name (natural sorting).
  }
 
  static bool TownPopulationSorter(const Town * const &a, const Town * const &b)
  {
    uint32 a_population = a->cache.population;
    uint32 b_population = b->cache.population;
    if (a_population == b_population) return TownDirectoryWindow::TownNameSorter(a, b);
    return a_population < b_population;
  }
 
  static bool TownRatingSorter(const Town * const &a, const Town * const &b)
  {
    bool before = !TownDirectoryWindow::last_sorting.order; // Value to get 'a' before 'b'.
 
    /* Towns without rating are always after towns with rating. */
    if (HasBit(a->have_ratings, _local_company)) {
      if (HasBit(b->have_ratings, _local_company)) {
        int16 a_rating = a->ratings[_local_company];
        int16 b_rating = b->ratings[_local_company];
        if (a_rating == b_rating) return TownDirectoryWindow::TownNameSorter(a, b);
        return a_rating < b_rating;
      }
      return before;
    }
    if (HasBit(b->have_ratings, _local_company)) return !before;
 
    /* Sort unrated towns always on ascending town name. */
    if (before) return TownDirectoryWindow::TownNameSorter(a, b);
    return !TownDirectoryWindow::TownNameSorter(a, b);
  }
 
public:
  TownDirectoryWindow(WindowDesc *desc) : Window(desc), townname_editbox(MAX_LENGTH_TOWN_NAME_CHARS * MAX_CHAR_LENGTH, MAX_LENGTH_TOWN_NAME_CHARS)
  {
    this->CreateNestedTree();
 
    this->vscroll = this->GetScrollbar(WID_TD_SCROLLBAR);
 
    this->towns.SetListing(this->last_sorting);
    this->towns.SetSortFuncs(TownDirectoryWindow::sorter_funcs);
    this->towns.ForceRebuild();
    this->BuildSortTownList();
 
    this->FinishInitNested(0);
 
    this->querystrings[WID_TD_FILTER] = &this->townname_editbox;
    this->townname_editbox.cancel_button = QueryString::ACTION_CLEAR;
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_TD_WORLD_POPULATION:
        SetDParam(0, GetWorldPopulation());
        break;
 
      case WID_TD_SORT_CRITERIA:
        SetDParam(0, TownDirectoryWindow::sorter_names[this->towns.SortType()]);
        break;
    }
  }
 
  static StringID GetTownString(const Town *t)
  {
    return t->larger_town ? STR_TOWN_DIRECTORY_CITY : STR_TOWN_DIRECTORY_TOWN;
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_TD_SORT_ORDER:
        this->DrawSortButtonState(widget, this->towns.IsDescSortOrder() ? SBS_DOWN : SBS_UP);
        break;
 
      case WID_TD_LIST: {
        int n = 0;
        int y = r.top + WD_FRAMERECT_TOP;
        if (this->towns.size() == 0) { // No towns available.
          DrawString(r.left + WD_FRAMERECT_LEFT, r.right, y, STR_TOWN_DIRECTORY_NONE);
          break;
        }
 
        /* At least one town available. */
        bool rtl = _current_text_dir == TD_RTL;
        Dimension icon_size = GetSpriteSize(SPR_TOWN_RATING_GOOD);
        int text_left  = r.left + WD_FRAMERECT_LEFT + (rtl ? 0 : icon_size.width + 2);
        int text_right = r.right - WD_FRAMERECT_RIGHT - (rtl ? icon_size.width + 2 : 0);
        int icon_x = rtl ? r.right - WD_FRAMERECT_RIGHT - icon_size.width : r.left + WD_FRAMERECT_LEFT;
 
        for (uint i = this->vscroll->GetPosition(); i < this->towns.size(); i++) {
          const Town *t = this->towns[i];
          assert(t->xy != INVALID_TILE);
 
          /* Draw rating icon. */
          if (_game_mode == GM_EDITOR || !HasBit(t->have_ratings, _local_company)) {
            DrawSprite(SPR_TOWN_RATING_NA, PAL_NONE, icon_x, y + (this->resize.step_height - icon_size.height) / 2);
          } else {
            SpriteID icon = SPR_TOWN_RATING_APALLING;
            if (t->ratings[_local_company] > RATING_VERYPOOR) icon = SPR_TOWN_RATING_MEDIOCRE;
            if (t->ratings[_local_company] > RATING_GOOD)     icon = SPR_TOWN_RATING_GOOD;
            DrawSprite(icon, PAL_NONE, icon_x, y + (this->resize.step_height - icon_size.height) / 2);
          }
 
          SetDParam(0, t->index);
          SetDParam(1, t->cache.population);
          DrawString(text_left, text_right, y + (this->resize.step_height - FONT_HEIGHT_NORMAL) / 2, GetTownString(t));
 
          y += this->resize.step_height;
          if (++n == this->vscroll->GetCapacity()) break; // max number of towns in 1 window
        }
        break;
      }
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_TD_SORT_ORDER: {
        Dimension d = GetStringBoundingBox(this->GetWidget<NWidgetCore>(widget)->widget_data);
        d.width += padding.width + Window::SortButtonWidth() * 2; // Doubled since the string is centred and it also looks better.
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
      case WID_TD_SORT_CRITERIA: {
        Dimension d = {0, 0};
        for (uint i = 0; TownDirectoryWindow::sorter_names[i] != INVALID_STRING_ID; i++) {
          d = maxdim(d, GetStringBoundingBox(TownDirectoryWindow::sorter_names[i]));
        }
        d.width += padding.width;
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
      case WID_TD_LIST: {
        Dimension d = GetStringBoundingBox(STR_TOWN_DIRECTORY_NONE);
        for (uint i = 0; i < this->towns.size(); i++) {
          const Town *t = this->towns[i];
 
          assert(t != nullptr);
 
          SetDParam(0, t->index);
          SetDParamMaxDigits(1, 8);
          d = maxdim(d, GetStringBoundingBox(GetTownString(t)));
        }
        Dimension icon_size = GetSpriteSize(SPR_TOWN_RATING_GOOD);
        d.width += icon_size.width + 2;
        d.height = std::max(d.height, icon_size.height);
        resize->height = d.height;
        d.height *= 5;
        d.width += padding.width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        d.height += padding.height + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
        *size = maxdim(*size, d);
        break;
      }
      case WID_TD_WORLD_POPULATION: {
        SetDParamMaxDigits(0, 10);
        Dimension d = GetStringBoundingBox(STR_TOWN_POPULATION);
        d.width += padding.width;
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_TD_SORT_ORDER: // Click on sort order button
        if (this->towns.SortType() != 2) { // A different sort than by rating.
          this->towns.ToggleSortOrder();
          this->last_sorting = this->towns.GetListing(); // Store new sorting order.
        } else {
          /* Some parts are always sorted ascending on name. */
          this->last_sorting.order = !this->last_sorting.order;
          this->towns.SetListing(this->last_sorting);
          this->towns.ForceResort();
          this->towns.Sort();
        }
        this->SetDirty();
        break;
 
      case WID_TD_SORT_CRITERIA: // Click on sort criteria dropdown
        ShowDropDownMenu(this, TownDirectoryWindow::sorter_names, this->towns.SortType(), WID_TD_SORT_CRITERIA, 0, 0);
        break;
 
      case WID_TD_LIST: { // Click on Town Matrix
        uint id_v = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_TD_LIST, WD_FRAMERECT_TOP);
        if (id_v >= this->towns.size()) return; // click out of town bounds
 
        const Town *t = this->towns[id_v];
        assert(t != nullptr);
        if (_ctrl_pressed) {
          ShowExtraViewportWindow(t->xy);
        } else {
          ScrollMainWindowToTile(t->xy);
        }
        break;
      }
    }
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    if (widget != WID_TD_SORT_CRITERIA) return;
 
    if (this->towns.SortType() != index) {
      this->towns.SetSortType(index);
      this->last_sorting = this->towns.GetListing(); // Store new sorting order.
      this->BuildSortTownList();
    }
  }
 
  void OnPaint() override
  {
    if (this->towns.NeedRebuild()) this->BuildSortTownList();
    this->DrawWidgets();
  }
 
  void OnHundredthTick() override
  {
    this->BuildSortTownList();
    this->SetDirty();
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_TD_LIST);
  }
 
  void OnEditboxChanged(int wid) override
  {
    if (wid == WID_TD_FILTER) {
      this->string_filter.SetFilterTerm(this->townname_editbox.text.buf);
      this->InvalidateData(TDIWD_FORCE_REBUILD);
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    switch (data) {
      case TDIWD_FORCE_REBUILD:
        /* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
        this->towns.ForceRebuild();
        break;
 
      case TDIWD_POPULATION_CHANGE:
        if (this->towns.SortType() == 1) this->towns.ForceResort();
        break;
 
      default:
        this->towns.ForceResort();
    }
  }
};
 
Listing TownDirectoryWindow::last_sorting = {false, 0};
 
const StringID TownDirectoryWindow::sorter_names[] = {
  STR_SORT_BY_NAME,
  STR_SORT_BY_POPULATION,
  STR_SORT_BY_RATING,
  INVALID_STRING_ID
};
 
GUITownList::SortFunction * const TownDirectoryWindow::sorter_funcs[] = {
  &TownNameSorter,
  &TownPopulationSorter,
  &TownRatingSorter,
};
 
static WindowDesc _town_directory_desc(
  WDP_AUTO, "list_towns", 208, 202,
  WC_TOWN_DIRECTORY, WC_NONE,
  0,
  _nested_town_directory_widgets, lengthof(_nested_town_directory_widgets)
);
 
void ShowTownDirectory()
{
  if (BringWindowToFrontById(WC_TOWN_DIRECTORY, 0)) return;
  new TownDirectoryWindow(&_town_directory_desc);
}
 
void CcFoundTown(Commands cmd, const CommandCost &result, TileIndex tile)
{
  if (result.Failed()) return;
 
  if (_settings_client.sound.confirm) SndPlayTileFx(SND_1F_CONSTRUCTION_OTHER, tile);
  if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
}
 
void CcFoundRandomTown(Commands cmd, const CommandCost &result, Money, TownID town_id)
{
  if (result.Succeeded()) ScrollMainWindowToTile(Town::Get(town_id)->xy);
}
 
static const NWidgetPart _nested_found_town_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_FOUND_TOWN_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
    NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
  EndContainer(),
  /* Construct new town(s) buttons. */
  NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
    NWidget(NWID_SPACER), SetMinimalSize(0, 2),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_NEW_TOWN), SetMinimalSize(156, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_NEW_TOWN_BUTTON, STR_FOUND_TOWN_NEW_TOWN_TOOLTIP), SetPadding(0, 2, 1, 2),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_TF_RANDOM_TOWN), SetMinimalSize(156, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_RANDOM_TOWN_BUTTON, STR_FOUND_TOWN_RANDOM_TOWN_TOOLTIP), SetPadding(0, 2, 1, 2),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_TF_MANY_RANDOM_TOWNS), SetMinimalSize(156, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_MANY_RANDOM_TOWNS, STR_FOUND_TOWN_RANDOM_TOWNS_TOOLTIP), SetPadding(0, 2, 0, 2),
    /* Town name selection. */
    NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(156, 14), SetPadding(0, 2, 0, 2), SetDataTip(STR_FOUND_TOWN_NAME_TITLE, STR_NULL),
    NWidget(WWT_EDITBOX, COLOUR_GREY, WID_TF_TOWN_NAME_EDITBOX), SetMinimalSize(156, 12), SetPadding(0, 2, 3, 2),
                    SetDataTip(STR_FOUND_TOWN_NAME_EDITOR_TITLE, STR_FOUND_TOWN_NAME_EDITOR_HELP),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_TF_TOWN_NAME_RANDOM), SetMinimalSize(78, 12), SetPadding(0, 2, 0, 2), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_NAME_RANDOM_BUTTON, STR_FOUND_TOWN_NAME_RANDOM_TOOLTIP),
    /* Town size selection. */
    NWidget(NWID_HORIZONTAL), SetPIP(2, 0, 2),
      NWidget(NWID_SPACER), SetFill(1, 0),
      NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(148, 14), SetDataTip(STR_FOUND_TOWN_INITIAL_SIZE_TITLE, STR_NULL),
      NWidget(NWID_SPACER), SetFill(1, 0),
    EndContainer(),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(2, 0, 2),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_SIZE_SMALL), SetMinimalSize(78, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_INITIAL_SIZE_SMALL_BUTTON, STR_FOUND_TOWN_INITIAL_SIZE_TOOLTIP),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_SIZE_MEDIUM), SetMinimalSize(78, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_INITIAL_SIZE_MEDIUM_BUTTON, STR_FOUND_TOWN_INITIAL_SIZE_TOOLTIP),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 1),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(2, 0, 2),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_SIZE_LARGE), SetMinimalSize(78, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_INITIAL_SIZE_LARGE_BUTTON, STR_FOUND_TOWN_INITIAL_SIZE_TOOLTIP),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_SIZE_RANDOM), SetMinimalSize(78, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_SIZE_RANDOM, STR_FOUND_TOWN_INITIAL_SIZE_TOOLTIP),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 3),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_CITY), SetPadding(0, 2, 0, 2), SetMinimalSize(156, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_CITY, STR_FOUND_TOWN_CITY_TOOLTIP), SetFill(1, 0),
    /* Town roads selection. */
    NWidget(NWID_HORIZONTAL), SetPIP(2, 0, 2),
      NWidget(NWID_SPACER), SetFill(1, 0),
      NWidget(WWT_LABEL, COLOUR_DARK_GREEN), SetMinimalSize(148, 14), SetDataTip(STR_FOUND_TOWN_ROAD_LAYOUT, STR_NULL),
      NWidget(NWID_SPACER), SetFill(1, 0),
    EndContainer(),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(2, 0, 2),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_LAYOUT_ORIGINAL), SetMinimalSize(78, 12), SetFill(1, 0), SetDataTip(STR_FOUND_TOWN_SELECT_LAYOUT_ORIGINAL, STR_FOUND_TOWN_SELECT_TOWN_ROAD_LAYOUT),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_LAYOUT_BETTER), SetMinimalSize(78, 12), SetFill(1, 0), SetDataTip(STR_FOUND_TOWN_SELECT_LAYOUT_BETTER_ROADS, STR_FOUND_TOWN_SELECT_TOWN_ROAD_LAYOUT),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 1),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(2, 0, 2),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_LAYOUT_GRID2), SetMinimalSize(78, 12), SetFill(1, 0), SetDataTip(STR_FOUND_TOWN_SELECT_LAYOUT_2X2_GRID, STR_FOUND_TOWN_SELECT_TOWN_ROAD_LAYOUT),
      NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_LAYOUT_GRID3), SetMinimalSize(78, 12), SetFill(1, 0), SetDataTip(STR_FOUND_TOWN_SELECT_LAYOUT_3X3_GRID, STR_FOUND_TOWN_SELECT_TOWN_ROAD_LAYOUT),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 1),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_TF_LAYOUT_RANDOM), SetPadding(0, 2, 0, 2), SetMinimalSize(0, 12), SetFill(1, 0),
                    SetDataTip(STR_FOUND_TOWN_SELECT_LAYOUT_RANDOM, STR_FOUND_TOWN_SELECT_TOWN_ROAD_LAYOUT), SetFill(1, 0),
    NWidget(NWID_SPACER), SetMinimalSize(0, 2),
  EndContainer(),
};
 
struct FoundTownWindow : Window {
private:
  TownSize town_size;     
  TownLayout town_layout; 
  bool city;              
  QueryString townname_editbox; 
  bool townnamevalid;     
  uint32 townnameparts;   
  TownNameParams params;  
 
public:
  FoundTownWindow(WindowDesc *desc, WindowNumber window_number) :
      Window(desc),
      town_size(TSZ_MEDIUM),
      town_layout(_settings_game.economy.town_layout),
      townname_editbox(MAX_LENGTH_TOWN_NAME_CHARS * MAX_CHAR_LENGTH, MAX_LENGTH_TOWN_NAME_CHARS),
      params(_settings_game.game_creation.town_name)
  {
    this->InitNested(window_number);
    this->querystrings[WID_TF_TOWN_NAME_EDITBOX] = &this->townname_editbox;
    this->RandomTownName();
    this->UpdateButtons(true);
  }
 
  void RandomTownName()
  {
    this->townnamevalid = GenerateTownName(&this->townnameparts);
 
    if (!this->townnamevalid) {
      this->townname_editbox.text.DeleteAll();
    } else {
      GetTownName(this->townname_editbox.text.buf, &this->params, this->townnameparts, &this->townname_editbox.text.buf[this->townname_editbox.text.max_bytes - 1]);
      this->townname_editbox.text.UpdateSize();
    }
    UpdateOSKOriginalText(this, WID_TF_TOWN_NAME_EDITBOX);
 
    this->SetWidgetDirty(WID_TF_TOWN_NAME_EDITBOX);
  }
 
  void UpdateButtons(bool check_availability)
  {
    if (check_availability && _game_mode != GM_EDITOR) {
      this->SetWidgetsDisabledState(true, WID_TF_RANDOM_TOWN, WID_TF_MANY_RANDOM_TOWNS, WID_TF_SIZE_LARGE, WIDGET_LIST_END);
      this->SetWidgetsDisabledState(_settings_game.economy.found_town != TF_CUSTOM_LAYOUT,
          WID_TF_LAYOUT_ORIGINAL, WID_TF_LAYOUT_BETTER, WID_TF_LAYOUT_GRID2, WID_TF_LAYOUT_GRID3, WID_TF_LAYOUT_RANDOM, WIDGET_LIST_END);
      if (_settings_game.economy.found_town != TF_CUSTOM_LAYOUT) town_layout = _settings_game.economy.town_layout;
    }
 
    for (int i = WID_TF_SIZE_SMALL; i <= WID_TF_SIZE_RANDOM; i++) {
      this->SetWidgetLoweredState(i, i == WID_TF_SIZE_SMALL + this->town_size);
    }
 
    this->SetWidgetLoweredState(WID_TF_CITY, this->city);
 
    for (int i = WID_TF_LAYOUT_ORIGINAL; i <= WID_TF_LAYOUT_RANDOM; i++) {
      this->SetWidgetLoweredState(i, i == WID_TF_LAYOUT_ORIGINAL + this->town_layout);
    }
 
    this->SetDirty();
  }
 
  template <typename Tcallback>
  void ExecuteFoundTownCommand(TileIndex tile, bool random, StringID errstr, Tcallback cc)
  {
    std::string name;
 
    if (!this->townnamevalid) {
      name = this->townname_editbox.text.buf;
    } else {
      /* If user changed the name, send it */
      char buf[MAX_LENGTH_TOWN_NAME_CHARS * MAX_CHAR_LENGTH];
      GetTownName(buf, &this->params, this->townnameparts, lastof(buf));
      if (strcmp(buf, this->townname_editbox.text.buf) != 0) name = this->townname_editbox.text.buf;
    }
 
    bool success = Command<CMD_FOUND_TOWN>::Post(errstr, cc,
        tile, this->town_size, this->city, this->town_layout, random, townnameparts, name);
 
    /* Rerandomise name, if success and no cost-estimation. */
    if (success && !_shift_pressed) this->RandomTownName();
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_TF_NEW_TOWN:
        HandlePlacePushButton(this, WID_TF_NEW_TOWN, SPR_CURSOR_TOWN, HT_RECT);
        break;
 
      case WID_TF_RANDOM_TOWN:
        this->ExecuteFoundTownCommand(0, true, STR_ERROR_CAN_T_GENERATE_TOWN, CcFoundRandomTown);
        break;
 
      case WID_TF_TOWN_NAME_RANDOM:
        this->RandomTownName();
        this->SetFocusedWidget(WID_TF_TOWN_NAME_EDITBOX);
        break;
 
      case WID_TF_MANY_RANDOM_TOWNS: {
        Backup<bool> old_generating_world(_generating_world, true, FILE_LINE);
        UpdateNearestTownForRoadTiles(true);
        if (!GenerateTowns(this->town_layout)) {
          ShowErrorMessage(STR_ERROR_CAN_T_GENERATE_TOWN, STR_ERROR_NO_SPACE_FOR_TOWN, WL_INFO);
        }
        UpdateNearestTownForRoadTiles(false);
        old_generating_world.Restore();
        break;
      }
 
      case WID_TF_SIZE_SMALL: case WID_TF_SIZE_MEDIUM: case WID_TF_SIZE_LARGE: case WID_TF_SIZE_RANDOM:
        this->town_size = (TownSize)(widget - WID_TF_SIZE_SMALL);
        this->UpdateButtons(false);
        break;
 
      case WID_TF_CITY:
        this->city ^= true;
        this->SetWidgetLoweredState(WID_TF_CITY, this->city);
        this->SetDirty();
        break;
 
      case WID_TF_LAYOUT_ORIGINAL: case WID_TF_LAYOUT_BETTER: case WID_TF_LAYOUT_GRID2:
      case WID_TF_LAYOUT_GRID3: case WID_TF_LAYOUT_RANDOM:
        this->town_layout = (TownLayout)(widget - WID_TF_LAYOUT_ORIGINAL);
        this->UpdateButtons(false);
        break;
    }
  }
 
  void OnPlaceObject(Point pt, TileIndex tile) override
  {
    this->ExecuteFoundTownCommand(tile, false, STR_ERROR_CAN_T_FOUND_TOWN_HERE, CcFoundTown);
  }
 
  void OnPlaceObjectAbort() override
  {
    this->RaiseButtons();
    this->UpdateButtons(false);
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!gui_scope) return;
    this->UpdateButtons(true);
  }
};
 
static WindowDesc _found_town_desc(
  WDP_AUTO, "build_town", 160, 162,
  WC_FOUND_TOWN, WC_NONE,
  WDF_CONSTRUCTION,
  _nested_found_town_widgets, lengthof(_nested_found_town_widgets)
);
 
void ShowFoundTownWindow()
{
  if (_game_mode != GM_EDITOR && !Company::IsValidID(_local_company)) return;
  AllocateWindowDescFront<FoundTownWindow>(&_found_town_desc, 0);
}
 
void InitializeTownGui()
{
  _town_local_authority_kdtree.Clear();
}