settings_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 "currency.h"
#include "error.h"
#include "settings_gui.h"
#include "textbuf_gui.h"
#include "command_func.h"
#include "network/network.h"
#include "network/network_content.h"
#include "town.h"
#include "settings_internal.h"
#include "strings_func.h"
#include "window_func.h"
#include "string_func.h"
#include "dropdown_type.h"
#include "dropdown_func.h"
#include "dropdown_common_type.h"
#include "slider_func.h"
#include "highscore.h"
#include "base_media_base.h"
#include "company_base.h"
#include "company_func.h"
#include "viewport_func.h"
#include "core/geometry_func.hpp"
#include "ai/ai.hpp"
#include "blitter/factory.hpp"
#include "language.h"
#include "textfile_gui.h"
#include "stringfilter_type.h"
#include "querystring_gui.h"
#include "fontcache.h"
#include "zoom_func.h"
#include "rev.h"
#include "video/video_driver.hpp"
#include "music/music_driver.hpp"
#include "gui.h"
#include "mixer.h"
#include "newgrf_config.h"
#include "network/core/config.h"
#include "network/network_gui.h"
#include "network/network_survey.h"
#include "video/video_driver.hpp"
#include "social_integration.h"
#include "sound_func.h"
 
#include "safeguards.h"
 
 
#if defined(WITH_FREETYPE) || defined(_WIN32) || defined(WITH_COCOA)
# define HAS_TRUETYPE_FONT
#endif
 
static const StringID _autosave_dropdown[] = {
  STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_OFF,
  STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_EVERY_10_MINUTES,
  STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_EVERY_30_MINUTES,
  STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_EVERY_60_MINUTES,
  STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_EVERY_120_MINUTES,
  INVALID_STRING_ID,
};
 
static const uint32_t _autosave_dropdown_to_minutes[] = {
  0, 
  10,
  30,
  60,
  120,
};
 
static Dimension _circle_size; 
 
static const void *ResolveObject(const GameSettings *settings_ptr, const IntSettingDesc *sd);
 
static uint GetCurrentResolutionIndex()
{
  auto it = std::find(_resolutions.begin(), _resolutions.end(), Dimension(_screen.width, _screen.height));
  return std::distance(_resolutions.begin(), it);
}
 
static void ShowCustCurrency();
 
struct BaseSetTextfileWindow : public TextfileWindow {
  const std::string name; 
  const StringID content_type; 
 
  BaseSetTextfileWindow(TextfileType file_type, const std::string &name, const std::string &textfile, StringID content_type) : TextfileWindow(file_type), name(name), content_type(content_type)
  {
    this->ConstructWindow();
    this->LoadTextfile(textfile, BASESET_DIR);
  }
 
  void SetStringParameters(WidgetID widget) const override
  {
    if (widget == WID_TF_CAPTION) {
      SetDParam(0, content_type);
      SetDParamStr(1, this->name);
    }
  }
};
 
template <class TBaseSet>
void ShowBaseSetTextfileWindow(TextfileType file_type, const TBaseSet *baseset, StringID content_type)
{
  CloseWindowById(WC_TEXTFILE, file_type);
  new BaseSetTextfileWindow(file_type, baseset->name, *baseset->GetTextfile(file_type), content_type);
}
 
template <class T>
DropDownList BuildSetDropDownList(int *selected_index)
{
  int n = T::GetNumSets();
  *selected_index = T::GetIndexOfUsedSet();
  DropDownList list;
  for (int i = 0; i < n; i++) {
    list.push_back(MakeDropDownListStringItem(T::GetSet(i)->GetListLabel(), i));
  }
  return list;
}
 
std::set<int> _refresh_rates = { 30, 60, 75, 90, 100, 120, 144, 240 };
 
static void AddCustomRefreshRates()
{
  /* Add the refresh rate as selected in the config. */
  _refresh_rates.insert(_settings_client.gui.refresh_rate);
 
  /* Add all the refresh rates of all monitors connected to the machine.  */
  std::vector<int> monitorRates = VideoDriver::GetInstance()->GetListOfMonitorRefreshRates();
  std::copy(monitorRates.begin(), monitorRates.end(), std::inserter(_refresh_rates, _refresh_rates.end()));
}
 
static const int SCALE_NMARKS = (MAX_INTERFACE_SCALE - MIN_INTERFACE_SCALE) / 25 + 1; // Show marks at 25% increments
static const int VOLUME_NMARKS = 9; // Show 5 values and 4 empty marks.
 
static StringID ScaleMarkFunc(int, int, int value)
{
  /* Label only every 100% mark. */
  if (value % 100 != 0) return STR_NULL;
 
  SetDParam(0, value / 100);
  SetDParam(1, 0);
  return STR_GAME_OPTIONS_GUI_SCALE_MARK;
}
 
static StringID VolumeMarkFunc(int, int mark, int value)
{
  /* Label only every other mark. */
  if (mark % 2 != 0) return STR_NULL;
 
  SetDParam(0, value / 31 * 25); // 0-127 does not map nicely to 0-100. Dividing first gives us nice round numbers.
  return STR_GAME_OPTIONS_VOLUME_MARK;
}
 
static constexpr NWidgetPart _nested_social_plugins_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_FRAME, COLOUR_GREY, WID_GO_SOCIAL_PLUGIN_TITLE), SetDataTip(STR_JUST_STRING2, STR_NULL),
      NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
        NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_SOCIAL_PLUGIN_PLATFORM, STR_NULL),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_GO_SOCIAL_PLUGIN_PLATFORM), SetMinimalSize(100, 12), SetDataTip(STR_JUST_RAW_STRING, STR_NULL), SetAlignment(SA_RIGHT),
      EndContainer(),
      NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
        NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE, STR_NULL),
        NWidget(WWT_TEXT, COLOUR_GREY, WID_GO_SOCIAL_PLUGIN_STATE), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING1, STR_NULL), SetAlignment(SA_RIGHT),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static constexpr NWidgetPart _nested_social_plugins_none_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_SOCIAL_PLUGINS_NONE, STR_NULL),
  EndContainer(),
};
 
class NWidgetSocialPlugins : public NWidgetVertical {
public:
  NWidgetSocialPlugins()
  {
    this->plugins = SocialIntegration::GetPlugins();
 
    if (this->plugins.empty()) {
      auto widget = MakeNWidgets(_nested_social_plugins_none_widgets, nullptr);
      this->Add(std::move(widget));
    } else {
      for (size_t i = 0; i < this->plugins.size(); i++) {
        auto widget = MakeNWidgets(_nested_social_plugins_widgets, nullptr);
        this->Add(std::move(widget));
      }
    }
 
    this->SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0);
  }
 
  void FillWidgetLookup(WidgetLookup &widget_lookup) override
  {
    widget_lookup[WID_GO_SOCIAL_PLUGINS] = this;
    NWidgetVertical::FillWidgetLookup(widget_lookup);
  }
 
  void SetupSmallestSize(Window *w) override
  {
    this->current_index = -1;
    NWidgetVertical::SetupSmallestSize(w);
  }
 
  template <typename T>
  std::string &GetWidestPlugin(T SocialIntegrationPlugin::*member) const
  {
    std::string *longest = &(this->plugins[0]->*member);
    int longest_length = 0;
 
    for (auto *plugin : this->plugins) {
      int length = GetStringBoundingBox(plugin->*member).width;
      if (length > longest_length) {
        longest_length = length;
        longest = &(plugin->*member);
      }
    }
 
    return *longest;
  }
 
  void SetStringParameters(int widget) const
  {
    switch (widget) {
      case WID_GO_SOCIAL_PLUGIN_TITLE:
        /* For SetupSmallestSize, use the longest string we have. */
        if (this->current_index < 0) {
          SetDParamStr(0, GetWidestPlugin(&SocialIntegrationPlugin::name));
          SetDParamStr(1, GetWidestPlugin(&SocialIntegrationPlugin::version));
          break;
        }
 
        if (this->plugins[this->current_index]->name.empty()) {
          SetDParam(0, STR_JUST_RAW_STRING);
          SetDParamStr(1, this->plugins[this->current_index]->basepath);
        } else {
          SetDParam(0, STR_GAME_OPTIONS_SOCIAL_PLUGIN_TITLE);
          SetDParamStr(1, this->plugins[this->current_index]->name);
          SetDParamStr(2, this->plugins[this->current_index]->version);
        }
        break;
 
      case WID_GO_SOCIAL_PLUGIN_PLATFORM:
        /* For SetupSmallestSize, use the longest string we have. */
        if (this->current_index < 0) {
          SetDParamStr(0, GetWidestPlugin(&SocialIntegrationPlugin::social_platform));
          break;
        }
 
        SetDParamStr(0, this->plugins[this->current_index]->social_platform);
        break;
 
      case WID_GO_SOCIAL_PLUGIN_STATE: {
        static const std::pair<SocialIntegrationPlugin::State, StringID> state_to_string[] = {
          { SocialIntegrationPlugin::RUNNING, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_RUNNING },
          { SocialIntegrationPlugin::FAILED, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_FAILED },
          { SocialIntegrationPlugin::PLATFORM_NOT_RUNNING, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_PLATFORM_NOT_RUNNING },
          { SocialIntegrationPlugin::UNLOADED, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_UNLOADED },
          { SocialIntegrationPlugin::DUPLICATE, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_DUPLICATE },
          { SocialIntegrationPlugin::UNSUPPORTED_API, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_UNSUPPORTED_API },
          { SocialIntegrationPlugin::INVALID_SIGNATURE, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_INVALID_SIGNATURE },
        };
 
        /* For SetupSmallestSize, use the longest string we have. */
        if (this->current_index < 0) {
          auto longest_plugin = GetWidestPlugin(&SocialIntegrationPlugin::social_platform);
 
          /* Set the longest plugin when looking for the longest status. */
          SetDParamStr(0, longest_plugin);
 
          StringID longest = STR_NULL;
          int longest_length = 0;
          for (auto state : state_to_string) {
            int length = GetStringBoundingBox(state.second).width;
            if (length > longest_length) {
              longest_length = length;
              longest = state.second;
            }
          }
 
          SetDParam(0, longest);
          SetDParamStr(1, longest_plugin);
          break;
        }
 
        auto plugin = this->plugins[this->current_index];
 
        /* Default string, in case no state matches. */
        SetDParam(0, STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_FAILED);
        SetDParamStr(1, plugin->social_platform);
 
        /* Find the string for the state. */
        for (auto state : state_to_string) {
          if (plugin->state == state.first) {
            SetDParam(0, state.second);
            break;
          }
        }
      }
      break;
    }
  }
 
  void Draw(const Window *w) override
  {
    this->current_index = 0;
 
    for (auto &wid : this->children) {
      wid->Draw(w);
      this->current_index++;
    }
  }
 
private:
  int current_index = -1;
  std::vector<SocialIntegrationPlugin *> plugins;
};
 
std::unique_ptr<NWidgetBase> MakeNWidgetSocialPlugins()
{
  return std::make_unique<NWidgetSocialPlugins>();
}
 
struct GameOptionsWindow : Window {
  GameSettings *opt;
  bool reload;
  int gui_scale;
  static inline WidgetID active_tab = WID_GO_TAB_GENERAL;
 
  GameOptionsWindow(WindowDesc &desc) : Window(desc)
  {
    this->opt = &GetGameSettings();
    this->reload = false;
    this->gui_scale = _gui_scale;
 
    AddCustomRefreshRates();
 
    this->InitNested(WN_GAME_OPTIONS_GAME_OPTIONS);
    this->OnInvalidateData(0);
 
    this->SetTab(GameOptionsWindow::active_tab);
 
    if constexpr (!NetworkSurveyHandler::IsSurveyPossible()) this->GetWidget<NWidgetStacked>(WID_GO_SURVEY_SEL)->SetDisplayedPlane(SZSP_NONE);
  }
 
  void Close([[maybe_unused]] int data = 0) override
  {
    CloseWindowById(WC_CUSTOM_CURRENCY, 0);
    CloseWindowByClass(WC_TEXTFILE);
    if (this->reload) _switch_mode = SM_MENU;
    this->Window::Close();
  }
 
  DropDownList BuildDropDownList(WidgetID widget, int *selected_index) const
  {
    DropDownList list;
    switch (widget) {
      case WID_GO_CURRENCY_DROPDOWN: { // Setup currencies dropdown
        *selected_index = this->opt->locale.currency;
        uint64_t disabled = _game_mode == GM_MENU ? 0LL : ~GetMaskOfAllowedCurrencies();
 
        /* Add non-custom currencies; sorted naturally */
        for (const CurrencySpec &currency : _currency_specs) {
          int i = &currency - _currency_specs.data();
          if (i == CURRENCY_CUSTOM) continue;
          if (currency.code.empty()) {
            list.push_back(MakeDropDownListStringItem(currency.name, i, HasBit(disabled, i)));
          } else {
            SetDParam(0, currency.name);
            SetDParamStr(1, currency.code);
            list.push_back(MakeDropDownListStringItem(STR_GAME_OPTIONS_CURRENCY_CODE, i, HasBit(disabled, i)));
          }
        }
        std::sort(list.begin(), list.end(), DropDownListStringItem::NatSortFunc);
 
        /* Append custom currency at the end */
        list.push_back(MakeDropDownListDividerItem()); // separator line
        list.push_back(MakeDropDownListStringItem(STR_GAME_OPTIONS_CURRENCY_CUSTOM, CURRENCY_CUSTOM, HasBit(disabled, CURRENCY_CUSTOM)));
        break;
      }
 
      case WID_GO_AUTOSAVE_DROPDOWN: { // Setup autosave dropdown
        int index = 0;
        for (auto &minutes : _autosave_dropdown_to_minutes) {
          index++;
          if (_settings_client.gui.autosave_interval <= minutes) break;
        }
        *selected_index = index - 1;
 
        const StringID *items = _autosave_dropdown;
        for (uint i = 0; *items != INVALID_STRING_ID; items++, i++) {
          list.push_back(MakeDropDownListStringItem(*items, i));
        }
        break;
      }
 
      case WID_GO_LANG_DROPDOWN: { // Setup interface language dropdown
        for (uint i = 0; i < _languages.size(); i++) {
          bool hide_language = IsReleasedVersion() && !_languages[i].IsReasonablyFinished();
          if (hide_language) continue;
          bool hide_percentage = IsReleasedVersion() || _languages[i].missing < _settings_client.gui.missing_strings_threshold;
          if (&_languages[i] == _current_language) {
            *selected_index = i;
            SetDParamStr(0, _languages[i].own_name);
          } else {
            /* Especially with sprite-fonts, not all localized
             * names can be rendered. So instead, we use the
             * international names for anything but the current
             * selected language. This avoids showing a few ????
             * entries in the dropdown list. */
            SetDParamStr(0, _languages[i].name);
          }
          SetDParam(1, (LANGUAGE_TOTAL_STRINGS - _languages[i].missing) * 100 / LANGUAGE_TOTAL_STRINGS);
          list.push_back(MakeDropDownListStringItem(hide_percentage ? STR_JUST_RAW_STRING : STR_GAME_OPTIONS_LANGUAGE_PERCENTAGE, i));
        }
        std::sort(list.begin(), list.end(), DropDownListStringItem::NatSortFunc);
        break;
      }
 
      case WID_GO_RESOLUTION_DROPDOWN: // Setup resolution dropdown
        if (_resolutions.empty()) break;
 
        *selected_index = GetCurrentResolutionIndex();
        for (uint i = 0; i < _resolutions.size(); i++) {
          SetDParam(0, _resolutions[i].width);
          SetDParam(1, _resolutions[i].height);
          list.push_back(MakeDropDownListStringItem(STR_GAME_OPTIONS_RESOLUTION_ITEM, i));
        }
        break;
 
      case WID_GO_REFRESH_RATE_DROPDOWN: // Setup refresh rate dropdown
        for (auto it = _refresh_rates.begin(); it != _refresh_rates.end(); it++) {
          auto i = std::distance(_refresh_rates.begin(), it);
          if (*it == _settings_client.gui.refresh_rate) *selected_index = i;
          SetDParam(0, *it);
          list.push_back(MakeDropDownListStringItem(STR_GAME_OPTIONS_REFRESH_RATE_ITEM, i));
        }
        break;
 
      case WID_GO_BASE_GRF_DROPDOWN:
        list = BuildSetDropDownList<BaseGraphics>(selected_index);
        break;
 
      case WID_GO_BASE_SFX_DROPDOWN:
        list = BuildSetDropDownList<BaseSounds>(selected_index);
        break;
 
      case WID_GO_BASE_MUSIC_DROPDOWN:
        list = BuildSetDropDownList<BaseMusic>(selected_index);
        break;
    }
 
    return list;
  }
 
  void SetStringParameters(WidgetID widget) const override
  {
    switch (widget) {
      case WID_GO_CURRENCY_DROPDOWN: {
        const CurrencySpec &currency = _currency_specs[this->opt->locale.currency];
        if (currency.code.empty()) {
          SetDParam(0, currency.name);
        } else {
          SetDParam(0, STR_GAME_OPTIONS_CURRENCY_CODE);
          SetDParam(1, currency.name);
          SetDParamStr(2, currency.code);
        }
        break;
      }
      case WID_GO_AUTOSAVE_DROPDOWN: {
        int index = 0;
        for (auto &minutes : _autosave_dropdown_to_minutes) {
          index++;
          if (_settings_client.gui.autosave_interval <= minutes) break;
        }
        SetDParam(0, _autosave_dropdown[index - 1]);
        break;
      }
      case WID_GO_LANG_DROPDOWN:         SetDParamStr(0, _current_language->own_name); break;
      case WID_GO_BASE_GRF_DROPDOWN:     SetDParamStr(0, BaseGraphics::GetUsedSet()->GetListLabel()); break;
      case WID_GO_BASE_SFX_DROPDOWN:     SetDParamStr(0, BaseSounds::GetUsedSet()->GetListLabel()); break;
      case WID_GO_BASE_MUSIC_DROPDOWN:   SetDParamStr(0, BaseMusic::GetUsedSet()->GetListLabel()); break;
      case WID_GO_REFRESH_RATE_DROPDOWN: SetDParam(0, _settings_client.gui.refresh_rate); break;
      case WID_GO_RESOLUTION_DROPDOWN: {
        auto current_resolution = GetCurrentResolutionIndex();
 
        if (current_resolution == _resolutions.size()) {
          SetDParam(0, STR_GAME_OPTIONS_RESOLUTION_OTHER);
        } else {
          SetDParam(0, STR_GAME_OPTIONS_RESOLUTION_ITEM);
          SetDParam(1, _resolutions[current_resolution].width);
          SetDParam(2, _resolutions[current_resolution].height);
        }
        break;
      }
 
      case WID_GO_SOCIAL_PLUGIN_TITLE:
      case WID_GO_SOCIAL_PLUGIN_PLATFORM:
      case WID_GO_SOCIAL_PLUGIN_STATE: {
        const NWidgetSocialPlugins *plugin = this->GetWidget<NWidgetSocialPlugins>(WID_GO_SOCIAL_PLUGINS);
        assert(plugin != nullptr);
 
        plugin->SetStringParameters(widget);
        break;
      }
    }
  }
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_GO_BASE_GRF_DESCRIPTION:
        SetDParamStr(0, BaseGraphics::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode()));
        DrawStringMultiLine(r.left, r.right, r.top, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
        break;
 
      case WID_GO_BASE_SFX_DESCRIPTION:
        SetDParamStr(0, BaseSounds::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode()));
        DrawStringMultiLine(r.left, r.right, r.top, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
        break;
 
      case WID_GO_BASE_MUSIC_DESCRIPTION:
        SetDParamStr(0, BaseMusic::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode()));
        DrawStringMultiLine(r.left, r.right, r.top, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
        break;
 
      case WID_GO_GUI_SCALE:
        DrawSliderWidget(r, MIN_INTERFACE_SCALE, MAX_INTERFACE_SCALE, SCALE_NMARKS, this->gui_scale, ScaleMarkFunc);
        break;
 
      case WID_GO_VIDEO_DRIVER_INFO:
        SetDParamStr(0, std::string{VideoDriver::GetInstance()->GetInfoString()});
        DrawStringMultiLine(r, STR_GAME_OPTIONS_VIDEO_DRIVER_INFO);
        break;
 
      case WID_GO_BASE_SFX_VOLUME:
        DrawSliderWidget(r, 0, INT8_MAX, VOLUME_NMARKS, _settings_client.music.effect_vol, VolumeMarkFunc);
        break;
 
      case WID_GO_BASE_MUSIC_VOLUME:
        DrawSliderWidget(r, 0, INT8_MAX, VOLUME_NMARKS, _settings_client.music.music_vol, VolumeMarkFunc);
        break;
    }
  }
 
  void SetTab(WidgetID widget)
  {
    this->SetWidgetsLoweredState(false, WID_GO_TAB_GENERAL, WID_GO_TAB_GRAPHICS, WID_GO_TAB_SOUND, WID_GO_TAB_SOCIAL);
    this->LowerWidget(widget);
    GameOptionsWindow::active_tab = widget;
 
    int pane;
    switch (widget) {
      case WID_GO_TAB_GENERAL: pane = 0; break;
      case WID_GO_TAB_GRAPHICS: pane = 1; break;
      case WID_GO_TAB_SOUND: pane = 2; break;
      case WID_GO_TAB_SOCIAL: pane = 3; break;
      default: NOT_REACHED();
    }
 
    this->GetWidget<NWidgetStacked>(WID_GO_TAB_SELECTION)->SetDisplayedPlane(pane);
    this->SetDirty();
  }
 
  void OnResize() override
  {
    bool changed = false;
 
    NWidgetResizeBase *wid = this->GetWidget<NWidgetResizeBase>(WID_GO_BASE_GRF_DESCRIPTION);
    int y = 0;
    for (int i = 0; i < BaseGraphics::GetNumSets(); i++) {
      SetDParamStr(0, BaseGraphics::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(STR_JUST_RAW_STRING, wid->current_x));
    }
    changed |= wid->UpdateVerticalSize(y);
 
    wid = this->GetWidget<NWidgetResizeBase>(WID_GO_BASE_SFX_DESCRIPTION);
    y = 0;
    for (int i = 0; i < BaseSounds::GetNumSets(); i++) {
      SetDParamStr(0, BaseSounds::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(STR_JUST_RAW_STRING, wid->current_x));
    }
    changed |= wid->UpdateVerticalSize(y);
 
    wid = this->GetWidget<NWidgetResizeBase>(WID_GO_BASE_MUSIC_DESCRIPTION);
    y = 0;
    for (int i = 0; i < BaseMusic::GetNumSets(); i++) {
      SetDParamStr(0, BaseMusic::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(STR_JUST_RAW_STRING, wid->current_x));
    }
    changed |= wid->UpdateVerticalSize(y);
 
    wid = this->GetWidget<NWidgetResizeBase>(WID_GO_VIDEO_DRIVER_INFO);
    SetDParamStr(0, std::string{VideoDriver::GetInstance()->GetInfoString()});
    y = GetStringHeight(STR_GAME_OPTIONS_VIDEO_DRIVER_INFO, wid->current_x);
    changed |= wid->UpdateVerticalSize(y);
 
    if (changed) this->ReInit(0, 0, this->flags & WF_CENTERED);
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      case WID_GO_TEXT_SFX_VOLUME:
      case WID_GO_TEXT_MUSIC_VOLUME: {
        Dimension d = maxdim(GetStringBoundingBox(STR_GAME_OPTIONS_SFX_VOLUME), GetStringBoundingBox(STR_GAME_OPTIONS_MUSIC_VOLUME));
        d.width += padding.width;
        d.height += padding.height;
        size = maxdim(size, d);
        break;
      }
 
      case WID_GO_CURRENCY_DROPDOWN:
      case WID_GO_AUTOSAVE_DROPDOWN:
      case WID_GO_LANG_DROPDOWN:
      case WID_GO_RESOLUTION_DROPDOWN:
      case WID_GO_REFRESH_RATE_DROPDOWN:
      case WID_GO_BASE_GRF_DROPDOWN:
      case WID_GO_BASE_SFX_DROPDOWN:
      case WID_GO_BASE_MUSIC_DROPDOWN: {
        int selected;
        size.width = std::max(size.width, GetDropDownListDimension(this->BuildDropDownList(widget, &selected)).width + padding.width);
        break;
      }
    }
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    if (widget >= WID_GO_BASE_GRF_TEXTFILE && widget < WID_GO_BASE_GRF_TEXTFILE + TFT_CONTENT_END) {
      if (BaseGraphics::GetUsedSet() == nullptr) return;
 
      ShowBaseSetTextfileWindow((TextfileType)(widget - WID_GO_BASE_GRF_TEXTFILE), BaseGraphics::GetUsedSet(), STR_CONTENT_TYPE_BASE_GRAPHICS);
      return;
    }
    if (widget >= WID_GO_BASE_SFX_TEXTFILE && widget < WID_GO_BASE_SFX_TEXTFILE + TFT_CONTENT_END) {
      if (BaseSounds::GetUsedSet() == nullptr) return;
 
      ShowBaseSetTextfileWindow((TextfileType)(widget - WID_GO_BASE_SFX_TEXTFILE), BaseSounds::GetUsedSet(), STR_CONTENT_TYPE_BASE_SOUNDS);
      return;
    }
    if (widget >= WID_GO_BASE_MUSIC_TEXTFILE && widget < WID_GO_BASE_MUSIC_TEXTFILE + TFT_CONTENT_END) {
      if (BaseMusic::GetUsedSet() == nullptr) return;
 
      ShowBaseSetTextfileWindow((TextfileType)(widget - WID_GO_BASE_MUSIC_TEXTFILE), BaseMusic::GetUsedSet(), STR_CONTENT_TYPE_BASE_MUSIC);
      return;
    }
    switch (widget) {
      case WID_GO_TAB_GENERAL:
      case WID_GO_TAB_GRAPHICS:
      case WID_GO_TAB_SOUND:
      case WID_GO_TAB_SOCIAL:
        this->SetTab(widget);
        break;
 
      case WID_GO_SURVEY_PARTICIPATE_BUTTON:
        switch (_settings_client.network.participate_survey) {
          case PS_ASK:
          case PS_NO:
            _settings_client.network.participate_survey = PS_YES;
            break;
 
          case PS_YES:
            _settings_client.network.participate_survey = PS_NO;
            break;
        }
 
        this->SetWidgetLoweredState(WID_GO_SURVEY_PARTICIPATE_BUTTON, _settings_client.network.participate_survey == PS_YES);
        this->SetWidgetDirty(WID_GO_SURVEY_PARTICIPATE_BUTTON);
        break;
 
      case WID_GO_SURVEY_LINK_BUTTON:
        OpenBrowser(NETWORK_SURVEY_DETAILS_LINK);
        break;
 
      case WID_GO_SURVEY_PREVIEW_BUTTON:
        ShowSurveyResultTextfileWindow();
        break;
 
      case WID_GO_FULLSCREEN_BUTTON: // Click fullscreen on/off
        /* try to toggle full-screen on/off */
        if (!ToggleFullScreen(!_fullscreen)) {
          ShowErrorMessage(STR_ERROR_FULLSCREEN_FAILED, INVALID_STRING_ID, WL_ERROR);
        }
        this->SetWidgetLoweredState(WID_GO_FULLSCREEN_BUTTON, _fullscreen);
        this->SetWidgetDirty(WID_GO_FULLSCREEN_BUTTON);
        break;
 
      case WID_GO_VIDEO_ACCEL_BUTTON:
        _video_hw_accel = !_video_hw_accel;
        ShowErrorMessage(STR_GAME_OPTIONS_VIDEO_ACCELERATION_RESTART, INVALID_STRING_ID, WL_INFO);
        this->SetWidgetLoweredState(WID_GO_VIDEO_ACCEL_BUTTON, _video_hw_accel);
        this->SetWidgetDirty(WID_GO_VIDEO_ACCEL_BUTTON);
#ifndef __APPLE__
        this->SetWidgetLoweredState(WID_GO_VIDEO_VSYNC_BUTTON, _video_hw_accel && _video_vsync);
        this->SetWidgetDisabledState(WID_GO_VIDEO_VSYNC_BUTTON, !_video_hw_accel);
        this->SetWidgetDirty(WID_GO_VIDEO_VSYNC_BUTTON);
#endif
        break;
 
      case WID_GO_VIDEO_VSYNC_BUTTON:
        if (!_video_hw_accel) break;
 
        _video_vsync = !_video_vsync;
        VideoDriver::GetInstance()->ToggleVsync(_video_vsync);
 
        this->SetWidgetLoweredState(WID_GO_VIDEO_VSYNC_BUTTON, _video_vsync);
        this->SetWidgetDirty(WID_GO_VIDEO_VSYNC_BUTTON);
        this->SetWidgetDisabledState(WID_GO_REFRESH_RATE_DROPDOWN, _video_vsync);
        this->SetWidgetDirty(WID_GO_REFRESH_RATE_DROPDOWN);
        break;
 
      case WID_GO_GUI_SCALE_BEVEL_BUTTON: {
        _settings_client.gui.scale_bevels = !_settings_client.gui.scale_bevels;
 
        this->SetWidgetLoweredState(WID_GO_GUI_SCALE_BEVEL_BUTTON, _settings_client.gui.scale_bevels);
        this->SetDirty();
 
        SetupWidgetDimensions();
        ReInitAllWindows(true);
        break;
      }
 
#ifdef HAS_TRUETYPE_FONT
      case WID_GO_GUI_FONT_SPRITE:
        _fcsettings.prefer_sprite = !_fcsettings.prefer_sprite;
 
        this->SetWidgetLoweredState(WID_GO_GUI_FONT_SPRITE, _fcsettings.prefer_sprite);
        this->SetWidgetDisabledState(WID_GO_GUI_FONT_AA, _fcsettings.prefer_sprite);
        this->SetDirty();
 
        InitFontCache(false);
        InitFontCache(true);
        ClearFontCache();
        CheckForMissingGlyphs();
        SetupWidgetDimensions();
        UpdateAllVirtCoords();
        ReInitAllWindows(true);
        break;
 
      case WID_GO_GUI_FONT_AA:
        _fcsettings.global_aa = !_fcsettings.global_aa;
 
        this->SetWidgetLoweredState(WID_GO_GUI_FONT_AA, _fcsettings.global_aa);
        MarkWholeScreenDirty();
 
        ClearFontCache();
        break;
#endif /* HAS_TRUETYPE_FONT */
 
      case WID_GO_GUI_SCALE:
        if (ClickSliderWidget(this->GetWidget<NWidgetBase>(widget)->GetCurrentRect(), pt, MIN_INTERFACE_SCALE, MAX_INTERFACE_SCALE, _ctrl_pressed ? 0 : SCALE_NMARKS, this->gui_scale)) {
          this->SetWidgetDirty(widget);
        }
 
        if (click_count > 0) this->mouse_capture_widget = widget;
        break;
 
      case WID_GO_GUI_SCALE_AUTO:
      {
        if (_gui_scale_cfg == -1) {
          _gui_scale_cfg = _gui_scale;
          this->SetWidgetLoweredState(WID_GO_GUI_SCALE_AUTO, false);
        } else {
          _gui_scale_cfg = -1;
          this->SetWidgetLoweredState(WID_GO_GUI_SCALE_AUTO, true);
          if (AdjustGUIZoom(false)) ReInitAllWindows(true);
          this->gui_scale = _gui_scale;
        }
        this->SetWidgetDirty(widget);
        break;
      }
 
      case WID_GO_BASE_GRF_PARAMETERS: {
        auto *used_set = BaseGraphics::GetUsedSet();
        if (used_set == nullptr || !used_set->IsConfigurable()) break;
        GRFConfig &extra_cfg = used_set->GetOrCreateExtraConfig();
        if (extra_cfg.num_params == 0) extra_cfg.SetParameterDefaults();
        OpenGRFParameterWindow(true, &extra_cfg, _game_mode == GM_MENU);
        if (_game_mode == GM_MENU) this->reload = true;
        break;
      }
 
      case WID_GO_BASE_SFX_VOLUME:
      case WID_GO_BASE_MUSIC_VOLUME: {
        uint8_t &vol = (widget == WID_GO_BASE_MUSIC_VOLUME) ? _settings_client.music.music_vol : _settings_client.music.effect_vol;
        if (ClickSliderWidget(this->GetWidget<NWidgetBase>(widget)->GetCurrentRect(), pt, 0, INT8_MAX, 0, vol)) {
          if (widget == WID_GO_BASE_MUSIC_VOLUME) {
            MusicDriver::GetInstance()->SetVolume(vol);
          } else {
            SetEffectVolume(vol);
          }
          this->SetWidgetDirty(widget);
          SetWindowClassesDirty(WC_MUSIC_WINDOW);
        }
 
        if (click_count > 0) this->mouse_capture_widget = widget;
        break;
      }
 
      case WID_GO_BASE_MUSIC_JUKEBOX: {
        ShowMusicWindow();
        break;
      }
 
      case WID_GO_BASE_GRF_OPEN_URL:
        if (BaseGraphics::GetUsedSet() == nullptr || BaseGraphics::GetUsedSet()->url.empty()) return;
        OpenBrowser(BaseGraphics::GetUsedSet()->url);
        break;
 
      case WID_GO_BASE_SFX_OPEN_URL:
        if (BaseSounds::GetUsedSet() == nullptr || BaseSounds::GetUsedSet()->url.empty()) return;
        OpenBrowser(BaseSounds::GetUsedSet()->url);
        break;
 
      case WID_GO_BASE_MUSIC_OPEN_URL:
        if (BaseMusic::GetUsedSet() == nullptr || BaseMusic::GetUsedSet()->url.empty()) return;
        OpenBrowser(BaseMusic::GetUsedSet()->url);
        break;
 
      case WID_GO_BASE_GRF_CONTENT_DOWNLOAD:
        ShowNetworkContentListWindow(nullptr, CONTENT_TYPE_BASE_GRAPHICS);
        break;
 
      case WID_GO_BASE_SFX_CONTENT_DOWNLOAD:
        ShowNetworkContentListWindow(nullptr, CONTENT_TYPE_BASE_SOUNDS);
        break;
 
      case WID_GO_BASE_MUSIC_CONTENT_DOWNLOAD:
        ShowNetworkContentListWindow(nullptr, CONTENT_TYPE_BASE_MUSIC);
        break;
 
      case WID_GO_CURRENCY_DROPDOWN:
      case WID_GO_AUTOSAVE_DROPDOWN:
      case WID_GO_LANG_DROPDOWN:
      case WID_GO_RESOLUTION_DROPDOWN:
      case WID_GO_REFRESH_RATE_DROPDOWN:
      case WID_GO_BASE_GRF_DROPDOWN:
      case WID_GO_BASE_SFX_DROPDOWN:
      case WID_GO_BASE_MUSIC_DROPDOWN: {
        int selected;
        DropDownList list = this->BuildDropDownList(widget, &selected);
        if (!list.empty()) {
          ShowDropDownList(this, std::move(list), selected, widget);
        } else {
          if (widget == WID_GO_RESOLUTION_DROPDOWN) ShowErrorMessage(STR_ERROR_RESOLUTION_LIST_FAILED, INVALID_STRING_ID, WL_ERROR);
        }
        break;
      }
    }
  }
 
  void OnMouseLoop() override
  {
    if (_left_button_down || this->gui_scale == _gui_scale) return;
 
    _gui_scale_cfg = this->gui_scale;
 
    if (AdjustGUIZoom(false)) {
      ReInitAllWindows(true);
      this->SetWidgetLoweredState(WID_GO_GUI_SCALE_AUTO, false);
      this->SetDirty();
    }
  }
 
  void OnDropdownSelect(WidgetID widget, int index) override
  {
    switch (widget) {
      case WID_GO_CURRENCY_DROPDOWN: // Currency
        if (index == CURRENCY_CUSTOM) ShowCustCurrency();
        this->opt->locale.currency = index;
        ReInitAllWindows(false);
        break;
 
      case WID_GO_AUTOSAVE_DROPDOWN: // Autosave options
        _settings_client.gui.autosave_interval = _autosave_dropdown_to_minutes[index];
        ChangeAutosaveFrequency(false);
        this->SetDirty();
        break;
 
      case WID_GO_LANG_DROPDOWN: // Change interface language
        ReadLanguagePack(&_languages[index]);
        CloseWindowByClass(WC_QUERY_STRING);
        CheckForMissingGlyphs();
        ClearAllCachedNames();
        UpdateAllVirtCoords();
        CheckBlitter();
        ReInitAllWindows(false);
        break;
 
      case WID_GO_RESOLUTION_DROPDOWN: // Change resolution
        if ((uint)index < _resolutions.size() && ChangeResInGame(_resolutions[index].width, _resolutions[index].height)) {
          this->SetDirty();
        }
        break;
 
      case WID_GO_REFRESH_RATE_DROPDOWN: {
        _settings_client.gui.refresh_rate = *std::next(_refresh_rates.begin(), index);
        if (_settings_client.gui.refresh_rate > 60) {
          /* Show warning to the user that this refresh rate might not be suitable on
           * larger maps with many NewGRFs and vehicles. */
          ShowErrorMessage(STR_GAME_OPTIONS_REFRESH_RATE_WARNING, INVALID_STRING_ID, WL_INFO);
        }
        break;
      }
 
      case WID_GO_BASE_GRF_DROPDOWN:
        if (_game_mode == GM_MENU) {
          CloseWindowByClass(WC_GRF_PARAMETERS);
          auto set = BaseGraphics::GetSet(index);
          BaseGraphics::SetSet(set);
          this->reload = true;
          this->InvalidateData();
        }
        break;
 
      case WID_GO_BASE_SFX_DROPDOWN:
        ChangeSoundSet(index);
        break;
 
      case WID_GO_BASE_MUSIC_DROPDOWN:
        ChangeMusicSet(index);
        break;
    }
  }
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
    this->SetWidgetLoweredState(WID_GO_SURVEY_PARTICIPATE_BUTTON, _settings_client.network.participate_survey == PS_YES);
    this->SetWidgetLoweredState(WID_GO_FULLSCREEN_BUTTON, _fullscreen);
    this->SetWidgetLoweredState(WID_GO_VIDEO_ACCEL_BUTTON, _video_hw_accel);
    this->SetWidgetDisabledState(WID_GO_REFRESH_RATE_DROPDOWN, _video_vsync);
 
#ifndef __APPLE__
    this->SetWidgetLoweredState(WID_GO_VIDEO_VSYNC_BUTTON, _video_hw_accel && _video_vsync);
    this->SetWidgetDisabledState(WID_GO_VIDEO_VSYNC_BUTTON, !_video_hw_accel);
#endif
 
    this->SetWidgetLoweredState(WID_GO_GUI_SCALE_AUTO, _gui_scale_cfg == -1);
    this->SetWidgetLoweredState(WID_GO_GUI_SCALE_BEVEL_BUTTON, _settings_client.gui.scale_bevels);
#ifdef HAS_TRUETYPE_FONT
    this->SetWidgetLoweredState(WID_GO_GUI_FONT_SPRITE, _fcsettings.prefer_sprite);
    this->SetWidgetLoweredState(WID_GO_GUI_FONT_AA, _fcsettings.global_aa);
    this->SetWidgetDisabledState(WID_GO_GUI_FONT_AA, _fcsettings.prefer_sprite);
#endif /* HAS_TRUETYPE_FONT */
 
    this->SetWidgetDisabledState(WID_GO_BASE_GRF_DROPDOWN, _game_mode != GM_MENU);
 
    this->SetWidgetDisabledState(WID_GO_BASE_GRF_PARAMETERS, BaseGraphics::GetUsedSet() == nullptr || !BaseGraphics::GetUsedSet()->IsConfigurable());
 
    this->SetWidgetDisabledState(WID_GO_BASE_GRF_OPEN_URL, BaseGraphics::GetUsedSet() == nullptr || BaseGraphics::GetUsedSet()->url.empty());
    this->SetWidgetDisabledState(WID_GO_BASE_SFX_OPEN_URL, BaseSounds::GetUsedSet() == nullptr || BaseSounds::GetUsedSet()->url.empty());
    this->SetWidgetDisabledState(WID_GO_BASE_MUSIC_OPEN_URL, BaseMusic::GetUsedSet() == nullptr || BaseMusic::GetUsedSet()->url.empty());
 
    for (TextfileType tft = TFT_CONTENT_BEGIN; tft < TFT_CONTENT_END; tft++) {
      this->SetWidgetDisabledState(WID_GO_BASE_GRF_TEXTFILE + tft, BaseGraphics::GetUsedSet() == nullptr || !BaseGraphics::GetUsedSet()->GetTextfile(tft).has_value());
      this->SetWidgetDisabledState(WID_GO_BASE_SFX_TEXTFILE + tft, BaseSounds::GetUsedSet() == nullptr || !BaseSounds::GetUsedSet()->GetTextfile(tft).has_value());
      this->SetWidgetDisabledState(WID_GO_BASE_MUSIC_TEXTFILE + tft, BaseMusic::GetUsedSet() == nullptr || !BaseMusic::GetUsedSet()->GetTextfile(tft).has_value());
    }
 
    this->SetWidgetsDisabledState(!_network_available, WID_GO_BASE_GRF_CONTENT_DOWNLOAD, WID_GO_BASE_SFX_CONTENT_DOWNLOAD, WID_GO_BASE_MUSIC_CONTENT_DOWNLOAD);
  }
};
 
static constexpr NWidgetPart _nested_game_options_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPadding(WidgetDimensions::unscaled.sparse),
      NWidget(WWT_TEXTBTN, COLOUR_YELLOW, WID_GO_TAB_GENERAL),  SetMinimalTextLines(2, 0), SetDataTip(STR_GAME_OPTIONS_TAB_GENERAL, STR_GAME_OPTIONS_TAB_GENERAL_TT), SetFill(1, 0),
      NWidget(WWT_TEXTBTN, COLOUR_YELLOW, WID_GO_TAB_GRAPHICS), SetMinimalTextLines(2, 0), SetDataTip(STR_GAME_OPTIONS_TAB_GRAPHICS, STR_GAME_OPTIONS_TAB_GRAPHICS_TT), SetFill(1, 0),
      NWidget(WWT_TEXTBTN, COLOUR_YELLOW, WID_GO_TAB_SOUND),    SetMinimalTextLines(2, 0), SetDataTip(STR_GAME_OPTIONS_TAB_SOUND, STR_GAME_OPTIONS_TAB_SOUND_TT), SetFill(1, 0),
      NWidget(WWT_TEXTBTN, COLOUR_YELLOW, WID_GO_TAB_SOCIAL),   SetMinimalTextLines(2, 0), SetDataTip(STR_GAME_OPTIONS_TAB_SOCIAL, STR_GAME_OPTIONS_TAB_SOCIAL_TT), SetFill(1, 0),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GO_TAB_SELECTION),
      /* General tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_LANGUAGE, STR_NULL),
          NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_LANG_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_RAW_STRING, STR_GAME_OPTIONS_LANGUAGE_TOOLTIP), SetFill(1, 0),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_AUTOSAVE_FRAME, STR_NULL),
          NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_AUTOSAVE_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING, STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_TOOLTIP), SetFill(1, 0),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_CURRENCY_UNITS_FRAME, STR_NULL),
          NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_CURRENCY_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING2, STR_GAME_OPTIONS_CURRENCY_UNITS_DROPDOWN_TOOLTIP), SetFill(1, 0),
        EndContainer(),
 
        NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GO_SURVEY_SEL),
          NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_FRAME, STR_NULL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_SURVEY_PARTICIPATE_BUTTON), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_SURVEY_PREVIEW_BUTTON), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_PREVIEW, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_PREVIEW_TOOLTIP),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_SURVEY_LINK_BUTTON), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_LINK, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_LINK_TOOLTIP),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
 
      /* Graphics tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_GUI_SCALE_FRAME, STR_NULL),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(WWT_EMPTY, COLOUR_GREY, WID_GO_GUI_SCALE), SetMinimalSize(67, 0), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(0, 0), SetDataTip(0x0, STR_GAME_OPTIONS_GUI_SCALE_TOOLTIP),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_GUI_SCALE_AUTO, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_GUI_SCALE_AUTO), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_GUI_SCALE_AUTO_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_GUI_SCALE_BEVELS, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_GUI_SCALE_BEVEL_BUTTON), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_GUI_SCALE_BEVELS_TOOLTIP),
            EndContainer(),
#ifdef HAS_TRUETYPE_FONT
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_GUI_FONT_SPRITE, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_GUI_FONT_SPRITE), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_GUI_FONT_SPRITE_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_GUI_FONT_AA, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_GUI_FONT_AA), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_GUI_FONT_AA_TOOLTIP),
            EndContainer(),
#endif /* HAS_TRUETYPE_FONT */
          EndContainer(),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_GRAPHICS, STR_NULL),
          NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_RESOLUTION, STR_NULL),
              NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_RESOLUTION_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING2, STR_GAME_OPTIONS_RESOLUTION_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_REFRESH_RATE, STR_NULL),
              NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_REFRESH_RATE_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_GAME_OPTIONS_REFRESH_RATE_ITEM, STR_GAME_OPTIONS_REFRESH_RATE_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_FULLSCREEN, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_FULLSCREEN_BUTTON), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_FULLSCREEN_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_VIDEO_ACCELERATION, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_VIDEO_ACCEL_BUTTON), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_VIDEO_ACCELERATION_TOOLTIP),
            EndContainer(),
#ifndef __APPLE__
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
              NWidget(WWT_TEXT, COLOUR_GREY), SetMinimalSize(0, 12), SetFill(1, 0), SetDataTip(STR_GAME_OPTIONS_VIDEO_VSYNC, STR_NULL),
              NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_GO_VIDEO_VSYNC_BUTTON), SetAspect(WidgetDimensions::ASPECT_SETTINGS_BUTTON), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_VIDEO_VSYNC_TOOLTIP),
            EndContainer(),
#endif
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_VIDEO_DRIVER_INFO), SetMinimalTextLines(1, 0), SetFill(1, 0),
            EndContainer(),
          EndContainer(),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_BASE_GRF, STR_NULL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0), SetFill(1, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_BASE_GRF_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_RAW_STRING, STR_GAME_OPTIONS_BASE_GRF_TOOLTIP), SetFill(1, 0),
            NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_PARAMETERS), SetDataTip(STR_NEWGRF_SETTINGS_SET_PARAMETERS, STR_NULL),
            NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_CONTENT_DOWNLOAD), SetDataTip(STR_GAME_OPTIONS_ONLINE_CONTENT, STR_GAME_OPTIONS_ONLINE_CONTENT_TOOLTIP),
          EndContainer(),
          NWidget(WWT_TEXT, COLOUR_GREY, WID_GO_BASE_GRF_DESCRIPTION), SetMinimalSize(200, 0), SetDataTip(STR_EMPTY, STR_GAME_OPTIONS_BASE_GRF_DESCRIPTION_TOOLTIP), SetFill(1, 0),
          NWidget(NWID_VERTICAL),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_GRF_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
 
      /* Sound/Music tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_VOLUME, STR_NULL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_TEXT, COLOUR_GREY, WID_GO_TEXT_SFX_VOLUME), SetMinimalSize(0, 12), SetDataTip(STR_GAME_OPTIONS_SFX_VOLUME, STR_NULL),
            NWidget(WWT_EMPTY, COLOUR_GREY, WID_GO_BASE_SFX_VOLUME), SetMinimalSize(67, 0), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(1, 0), SetDataTip(0x0, STR_MUSIC_TOOLTIP_DRAG_SLIDERS_TO_SET_MUSIC),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_TEXT, COLOUR_GREY, WID_GO_TEXT_MUSIC_VOLUME), SetMinimalSize(0, 12), SetDataTip(STR_GAME_OPTIONS_MUSIC_VOLUME, STR_NULL),
            NWidget(WWT_EMPTY, COLOUR_GREY, WID_GO_BASE_MUSIC_VOLUME), SetMinimalSize(67, 0), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(1, 0), SetDataTip(0x0, STR_MUSIC_TOOLTIP_DRAG_SLIDERS_TO_SET_MUSIC),
          EndContainer(),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_BASE_SFX, STR_NULL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_BASE_SFX_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_RAW_STRING, STR_GAME_OPTIONS_BASE_SFX_TOOLTIP), SetFill(1, 0),
            NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_SFX_CONTENT_DOWNLOAD), SetDataTip(STR_GAME_OPTIONS_ONLINE_CONTENT, STR_GAME_OPTIONS_ONLINE_CONTENT_TOOLTIP),
          EndContainer(),
          NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_BASE_SFX_DESCRIPTION), SetMinimalSize(200, 0), SetMinimalTextLines(1, 0), SetDataTip(STR_NULL, STR_GAME_OPTIONS_BASE_SFX_DESCRIPTION_TOOLTIP), SetFill(1, 0),
          NWidget(NWID_VERTICAL),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_SFX_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_SFX_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_SFX_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_SFX_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
            EndContainer(),
          EndContainer(),
        EndContainer(),
 
        NWidget(WWT_FRAME, COLOUR_GREY), SetDataTip(STR_GAME_OPTIONS_BASE_MUSIC, STR_NULL), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_GO_BASE_MUSIC_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_RAW_STRING, STR_GAME_OPTIONS_BASE_MUSIC_TOOLTIP), SetFill(1, 0),
            NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_CONTENT_DOWNLOAD), SetDataTip(STR_GAME_OPTIONS_ONLINE_CONTENT, STR_GAME_OPTIONS_ONLINE_CONTENT_TOOLTIP),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_BASE_MUSIC_DESCRIPTION), SetMinimalSize(200, 0), SetMinimalTextLines(1, 0), SetDataTip(STR_NULL, STR_GAME_OPTIONS_BASE_MUSIC_DESCRIPTION_TOOLTIP), SetFill(1, 0),
            NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
              NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_JUKEBOX), SetMinimalSize(22, 22), SetDataTip(SPR_IMG_MUSIC, STR_TOOLBAR_TOOLTIP_SHOW_SOUND_MUSIC_WINDOW),
            EndContainer(),
          EndContainer(),
          NWidget(NWID_VERTICAL),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
            EndContainer(),
            NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
              NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_GO_BASE_MUSIC_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
            EndContainer(),
          EndContainer(),
        EndContainer(),
      EndContainer(),
 
      /* Social tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
        NWidgetFunction(MakeNWidgetSocialPlugins),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _game_options_desc(
  WDP_CENTER, nullptr, 0, 0,
  WC_GAME_OPTIONS, WC_NONE,
  0,
  _nested_game_options_widgets
);
 
void ShowGameOptions()
{
  CloseWindowByClass(WC_GAME_OPTIONS);
  new GameOptionsWindow(_game_options_desc);
}
 
static int SETTING_HEIGHT = 11;    
 
enum SettingEntryFlags {
  SEF_LEFT_DEPRESSED  = 0x01, 
  SEF_RIGHT_DEPRESSED = 0x02, 
  SEF_BUTTONS_MASK = (SEF_LEFT_DEPRESSED | SEF_RIGHT_DEPRESSED), 
 
  SEF_LAST_FIELD = 0x04, 
  SEF_FILTERED   = 0x08, 
};
 
enum RestrictionMode {
  RM_BASIC,                            
  RM_ADVANCED,                         
  RM_ALL,                              
  RM_CHANGED_AGAINST_DEFAULT,          
  RM_CHANGED_AGAINST_NEW,              
  RM_END,                              
};
DECLARE_POSTFIX_INCREMENT(RestrictionMode)
 
 
struct SettingFilter {
  StringFilter string;     
  RestrictionMode min_cat; 
  bool type_hides;         
  RestrictionMode mode;    
  SettingType type;        
};
 
struct BaseSettingEntry {
  uint8_t flags; 
  uint8_t level; 
 
  BaseSettingEntry() : flags(0), level(0) {}
  virtual ~BaseSettingEntry() = default;
 
  virtual void Init(uint8_t level = 0);
  virtual void FoldAll() {}
  virtual void UnFoldAll() {}
  virtual void ResetAll() = 0;
 
  void SetLastField(bool last_field) { if (last_field) SETBITS(this->flags, SEF_LAST_FIELD); else CLRBITS(this->flags, SEF_LAST_FIELD); }
 
  virtual uint Length() const = 0;
  virtual void GetFoldingState([[maybe_unused]] bool &all_folded, [[maybe_unused]] bool &all_unfolded) const {}
  virtual bool IsVisible(const BaseSettingEntry *item) const;
  virtual BaseSettingEntry *FindEntry(uint row, uint *cur_row);
  virtual uint GetMaxHelpHeight([[maybe_unused]] int maxw) { return 0; }
 
  bool IsFiltered() const { return (this->flags & SEF_FILTERED) != 0; }
 
  virtual bool UpdateFilterState(SettingFilter &filter, bool force_visible) = 0;
 
  virtual uint Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row = 0, uint parent_last = 0) const;
 
protected:
  virtual void DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const = 0;
};
 
struct SettingEntry : BaseSettingEntry {
  const char *name;              
  const IntSettingDesc *setting; 
 
  SettingEntry(const char *name);
 
  void Init(uint8_t level = 0) override;
  void ResetAll() override;
  uint Length() const override;
  uint GetMaxHelpHeight(int maxw) override;
  bool UpdateFilterState(SettingFilter &filter, bool force_visible) override;
 
  void SetButtons(uint8_t new_val);
 
protected:
  void DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const override;
 
private:
  bool IsVisibleByRestrictionMode(RestrictionMode mode) const;
};
 
struct SettingsContainer {
  typedef std::vector<BaseSettingEntry*> EntryVector;
  EntryVector entries; 
 
  template<typename T>
  T *Add(T *item)
  {
    this->entries.push_back(item);
    return item;
  }
 
  void Init(uint8_t level = 0);
  void ResetAll();
  void FoldAll();
  void UnFoldAll();
 
  uint Length() const;
  void GetFoldingState(bool &all_folded, bool &all_unfolded) const;
  bool IsVisible(const BaseSettingEntry *item) const;
  BaseSettingEntry *FindEntry(uint row, uint *cur_row);
  uint GetMaxHelpHeight(int maxw);
 
  bool UpdateFilterState(SettingFilter &filter, bool force_visible);
 
  uint Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row = 0, uint parent_last = 0) const;
};
 
struct SettingsPage : BaseSettingEntry, SettingsContainer {
  StringID title;     
  bool folded;        
 
  SettingsPage(StringID title);
 
  void Init(uint8_t level = 0) override;
  void ResetAll() override;
  void FoldAll() override;
  void UnFoldAll() override;
 
  uint Length() const override;
  void GetFoldingState(bool &all_folded, bool &all_unfolded) const override;
  bool IsVisible(const BaseSettingEntry *item) const override;
  BaseSettingEntry *FindEntry(uint row, uint *cur_row) override;
  uint GetMaxHelpHeight(int maxw) override { return SettingsContainer::GetMaxHelpHeight(maxw); }
 
  bool UpdateFilterState(SettingFilter &filter, bool force_visible) override;
 
  uint Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row = 0, uint parent_last = 0) const override;
 
protected:
  void DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const override;
};
 
/* == BaseSettingEntry methods == */
 
void BaseSettingEntry::Init(uint8_t level)
{
  this->level = level;
}
 
bool BaseSettingEntry::IsVisible(const BaseSettingEntry *item) const
{
  if (this->IsFiltered()) return false;
  return this == item;
}
 
BaseSettingEntry *BaseSettingEntry::FindEntry(uint row_num, uint *cur_row)
{
  if (this->IsFiltered()) return nullptr;
  if (row_num == *cur_row) return this;
  (*cur_row)++;
  return nullptr;
}
 
uint BaseSettingEntry::Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row, uint parent_last) const
{
  if (this->IsFiltered()) return cur_row;
  if (cur_row >= max_row) return cur_row;
 
  bool rtl = _current_text_dir == TD_RTL;
  int offset = (rtl ? -(int)_circle_size.width : (int)_circle_size.width) / 2;
  int level_width = rtl ? -WidgetDimensions::scaled.hsep_indent : WidgetDimensions::scaled.hsep_indent;
 
  int x = rtl ? right : left;
  if (cur_row >= first_row) {
    int colour = GetColourGradient(COLOUR_ORANGE, SHADE_NORMAL);
    y += (cur_row - first_row) * SETTING_HEIGHT; // Compute correct y start position
 
    /* Draw vertical for parent nesting levels */
    for (uint lvl = 0; lvl < this->level; lvl++) {
      if (!HasBit(parent_last, lvl)) GfxDrawLine(x + offset, y, x + offset, y + SETTING_HEIGHT - 1, colour);
      x += level_width;
    }
    /* draw own |- prefix */
    int halfway_y = y + SETTING_HEIGHT / 2;
    int bottom_y = (flags & SEF_LAST_FIELD) ? halfway_y : y + SETTING_HEIGHT - 1;
    GfxDrawLine(x + offset, y, x + offset, bottom_y, colour);
    /* Small horizontal line from the last vertical line */
    GfxDrawLine(x + offset, halfway_y, x + level_width - (rtl ? -WidgetDimensions::scaled.hsep_normal : WidgetDimensions::scaled.hsep_normal), halfway_y, colour);
    x += level_width;
 
    this->DrawSetting(settings_ptr, rtl ? left : x, rtl ? x : right, y, this == selected);
  }
  cur_row++;
 
  return cur_row;
}
 
/* == SettingEntry methods == */
 
SettingEntry::SettingEntry(const char *name)
{
  this->name = name;
  this->setting = nullptr;
}
 
void SettingEntry::Init(uint8_t level)
{
  BaseSettingEntry::Init(level);
  this->setting = GetSettingFromName(this->name)->AsIntSetting();
}
 
/* Sets the given setting entry to its default value */
void SettingEntry::ResetAll()
{
  SetSettingValue(this->setting, this->setting->def);
}
 
void SettingEntry::SetButtons(uint8_t new_val)
{
  assert((new_val & ~SEF_BUTTONS_MASK) == 0); // Should not touch any flags outside the buttons
  this->flags = (this->flags & ~SEF_BUTTONS_MASK) | new_val;
}
 
uint SettingEntry::Length() const
{
  return this->IsFiltered() ? 0 : 1;
}
 
uint SettingEntry::GetMaxHelpHeight(int maxw)
{
  return GetStringHeight(this->setting->GetHelp(), maxw);
}
 
bool SettingEntry::IsVisibleByRestrictionMode(RestrictionMode mode) const
{
  /* There shall not be any restriction, i.e. all settings shall be visible. */
  if (mode == RM_ALL) return true;
 
  const IntSettingDesc *sd = this->setting;
 
  if (mode == RM_BASIC) return (this->setting->cat & SC_BASIC_LIST) != 0;
  if (mode == RM_ADVANCED) return (this->setting->cat & SC_ADVANCED_LIST) != 0;
 
  /* Read the current value. */
  const void *object = ResolveObject(&GetGameSettings(), sd);
  int64_t current_value = sd->Read(object);
  int64_t filter_value;
 
  if (mode == RM_CHANGED_AGAINST_DEFAULT) {
    /* This entry shall only be visible, if the value deviates from its default value. */
 
    /* Read the default value. */
    filter_value = sd->def;
  } else {
    assert(mode == RM_CHANGED_AGAINST_NEW);
    /* This entry shall only be visible, if the value deviates from
     * its value is used when starting a new game. */
 
    /* Make sure we're not comparing the new game settings against itself. */
    assert(&GetGameSettings() != &_settings_newgame);
 
    /* Read the new game's value. */
    filter_value = sd->Read(ResolveObject(&_settings_newgame, sd));
  }
 
  return current_value != filter_value;
}
 
bool SettingEntry::UpdateFilterState(SettingFilter &filter, bool force_visible)
{
  CLRBITS(this->flags, SEF_FILTERED);
 
  bool visible = true;
 
  const IntSettingDesc *sd = this->setting;
  if (!force_visible && !filter.string.IsEmpty()) {
    /* Process the search text filter for this item. */
    filter.string.ResetState();
 
    SetDParam(0, STR_EMPTY);
    filter.string.AddLine(sd->GetTitle());
    filter.string.AddLine(sd->GetHelp());
 
    visible = filter.string.GetState();
  }
 
  if (visible) {
    if (filter.type != ST_ALL && sd->GetType() != filter.type) {
      filter.type_hides = true;
      visible = false;
    }
    if (!this->IsVisibleByRestrictionMode(filter.mode)) {
      while (filter.min_cat < RM_ALL && (filter.min_cat == filter.mode || !this->IsVisibleByRestrictionMode(filter.min_cat))) filter.min_cat++;
      visible = false;
    }
  }
 
  if (!visible) SETBITS(this->flags, SEF_FILTERED);
  return visible;
}
 
static const void *ResolveObject(const GameSettings *settings_ptr, const IntSettingDesc *sd)
{
  if ((sd->flags & SF_PER_COMPANY) != 0) {
    if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
      return &Company::Get(_local_company)->settings;
    }
    return &_settings_client.company;
  }
  return settings_ptr;
}
 
void SettingEntry::DrawSetting(GameSettings *settings_ptr, int left, int right, int y, bool highlight) const
{
  const IntSettingDesc *sd = this->setting;
  int state = this->flags & SEF_BUTTONS_MASK;
 
  bool rtl = _current_text_dir == TD_RTL;
  uint buttons_left = rtl ? right + 1 - SETTING_BUTTON_WIDTH : left;
  uint text_left  = left + (rtl ? 0 : SETTING_BUTTON_WIDTH + WidgetDimensions::scaled.hsep_wide);
  uint text_right = right - (rtl ? SETTING_BUTTON_WIDTH + WidgetDimensions::scaled.hsep_wide : 0);
  uint button_y = y + (SETTING_HEIGHT - SETTING_BUTTON_HEIGHT) / 2;
 
  /* We do not allow changes of some items when we are a client in a networkgame */
  bool editable = sd->IsEditable();
 
  SetDParam(0, STR_CONFIG_SETTING_VALUE);
  int32_t value = sd->Read(ResolveObject(settings_ptr, sd));
  if (sd->IsBoolSetting()) {
    /* Draw checkbox for boolean-value either on/off */
    DrawBoolButton(buttons_left, button_y, value != 0, editable);
  } else if ((sd->flags & SF_GUI_DROPDOWN) != 0) {
    /* Draw [v] button for settings of an enum-type */
    DrawDropDownButton(buttons_left, button_y, COLOUR_YELLOW, state != 0, editable);
  } else {
    /* Draw [<][>] boxes for settings of an integer-type */
    DrawArrowButtons(buttons_left, button_y, COLOUR_YELLOW, state,
        editable && value != (sd->flags & SF_GUI_0_IS_SPECIAL ? 0 : sd->min), editable && (uint32_t)value != sd->max);
  }
  sd->SetValueDParams(1, value);
  DrawString(text_left, text_right, y + (SETTING_HEIGHT - GetCharacterHeight(FS_NORMAL)) / 2, sd->GetTitle(), highlight ? TC_WHITE : TC_LIGHT_BLUE);
}
 
/* == SettingsContainer methods == */
 
void SettingsContainer::Init(uint8_t level)
{
  for (auto &it : this->entries) {
    it->Init(level);
  }
}
 
void SettingsContainer::ResetAll()
{
  for (auto settings_entry : this->entries) {
    settings_entry->ResetAll();
  }
}
 
void SettingsContainer::FoldAll()
{
  for (auto &it : this->entries) {
    it->FoldAll();
  }
}
 
void SettingsContainer::UnFoldAll()
{
  for (auto &it : this->entries) {
    it->UnFoldAll();
  }
}
 
void SettingsContainer::GetFoldingState(bool &all_folded, bool &all_unfolded) const
{
  for (auto &it : this->entries) {
    it->GetFoldingState(all_folded, all_unfolded);
  }
}
 
bool SettingsContainer::UpdateFilterState(SettingFilter &filter, bool force_visible)
{
  bool visible = false;
  bool first_visible = true;
  for (EntryVector::reverse_iterator it = this->entries.rbegin(); it != this->entries.rend(); ++it) {
    visible |= (*it)->UpdateFilterState(filter, force_visible);
    (*it)->SetLastField(first_visible);
    if (visible && first_visible) first_visible = false;
  }
  return visible;
}
 
 
bool SettingsContainer::IsVisible(const BaseSettingEntry *item) const
{
  for (const auto &it : this->entries) {
    if (it->IsVisible(item)) return true;
  }
  return false;
}
 
uint SettingsContainer::Length() const
{
  uint length = 0;
  for (const auto &it : this->entries) {
    length += it->Length();
  }
  return length;
}
 
BaseSettingEntry *SettingsContainer::FindEntry(uint row_num, uint *cur_row)
{
  BaseSettingEntry *pe = nullptr;
  for (const auto &it : this->entries) {
    pe = it->FindEntry(row_num, cur_row);
    if (pe != nullptr) {
      break;
    }
  }
  return pe;
}
 
uint SettingsContainer::GetMaxHelpHeight(int maxw)
{
  uint biggest = 0;
  for (const auto &it : this->entries) {
    biggest = std::max(biggest, it->GetMaxHelpHeight(maxw));
  }
  return biggest;
}
 
 
uint SettingsContainer::Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row, uint parent_last) const
{
  for (const auto &it : this->entries) {
    cur_row = it->Draw(settings_ptr, left, right, y, first_row, max_row, selected, cur_row, parent_last);
    if (cur_row >= max_row) break;
  }
  return cur_row;
}
 
/* == SettingsPage methods == */
 
SettingsPage::SettingsPage(StringID title)
{
  this->title = title;
  this->folded = true;
}
 
void SettingsPage::Init(uint8_t level)
{
  BaseSettingEntry::Init(level);
  SettingsContainer::Init(level + 1);
}
 
void SettingsPage::ResetAll()
{
  for (auto settings_entry : this->entries) {
    settings_entry->ResetAll();
  }
}
 
void SettingsPage::FoldAll()
{
  if (this->IsFiltered()) return;
  this->folded = true;
 
  SettingsContainer::FoldAll();
}
 
void SettingsPage::UnFoldAll()
{
  if (this->IsFiltered()) return;
  this->folded = false;
 
  SettingsContainer::UnFoldAll();
}
 
void SettingsPage::GetFoldingState(bool &all_folded, bool &all_unfolded) const
{
  if (this->IsFiltered()) return;
 
  if (this->folded) {
    all_unfolded = false;
  } else {
    all_folded = false;
  }
 
  SettingsContainer::GetFoldingState(all_folded, all_unfolded);
}
 
bool SettingsPage::UpdateFilterState(SettingFilter &filter, bool force_visible)
{
  if (!force_visible && !filter.string.IsEmpty()) {
    filter.string.ResetState();
    filter.string.AddLine(this->title);
    force_visible = filter.string.GetState();
  }
 
  bool visible = SettingsContainer::UpdateFilterState(filter, force_visible);
  if (visible) {
    CLRBITS(this->flags, SEF_FILTERED);
  } else {
    SETBITS(this->flags, SEF_FILTERED);
  }
  return visible;
}
 
bool SettingsPage::IsVisible(const BaseSettingEntry *item) const
{
  if (this->IsFiltered()) return false;
  if (this == item) return true;
  if (this->folded) return false;
 
  return SettingsContainer::IsVisible(item);
}
 
uint SettingsPage::Length() const
{
  if (this->IsFiltered()) return 0;
  if (this->folded) return 1; // Only displaying the title
 
  return 1 + SettingsContainer::Length();
}
 
BaseSettingEntry *SettingsPage::FindEntry(uint row_num, uint *cur_row)
{
  if (this->IsFiltered()) return nullptr;
  if (row_num == *cur_row) return this;
  (*cur_row)++;
  if (this->folded) return nullptr;
 
  return SettingsContainer::FindEntry(row_num, cur_row);
}
 
uint SettingsPage::Draw(GameSettings *settings_ptr, int left, int right, int y, uint first_row, uint max_row, BaseSettingEntry *selected, uint cur_row, uint parent_last) const
{
  if (this->IsFiltered()) return cur_row;
  if (cur_row >= max_row) return cur_row;
 
  cur_row = BaseSettingEntry::Draw(settings_ptr, left, right, y, first_row, max_row, selected, cur_row, parent_last);
 
  if (!this->folded) {
    if (this->flags & SEF_LAST_FIELD) {
      assert(this->level < 8 * sizeof(parent_last));
      SetBit(parent_last, this->level); // Add own last-field state
    }
 
    cur_row = SettingsContainer::Draw(settings_ptr, left, right, y, first_row, max_row, selected, cur_row, parent_last);
  }
 
  return cur_row;
}
 
void SettingsPage::DrawSetting(GameSettings *, int left, int right, int y, bool) const
{
  bool rtl = _current_text_dir == TD_RTL;
  DrawSprite((this->folded ? SPR_CIRCLE_FOLDED : SPR_CIRCLE_UNFOLDED), PAL_NONE, rtl ? right - _circle_size.width : left, y + (SETTING_HEIGHT - _circle_size.height) / 2);
  DrawString(rtl ? left : left + _circle_size.width + WidgetDimensions::scaled.hsep_normal, rtl ? right - _circle_size.width - WidgetDimensions::scaled.hsep_normal : right, y + (SETTING_HEIGHT - GetCharacterHeight(FS_NORMAL)) / 2, this->title, TC_ORANGE);
}
 
static SettingsContainer &GetSettingsTree()
{
  static SettingsContainer *main = nullptr;
 
  if (main == nullptr)
  {
    /* Build up the dynamic settings-array only once per OpenTTD session */
    main = new SettingsContainer();
 
    SettingsPage *localisation = main->Add(new SettingsPage(STR_CONFIG_SETTING_LOCALISATION));
    {
      localisation->Add(new SettingEntry("locale.units_velocity"));
      localisation->Add(new SettingEntry("locale.units_velocity_nautical"));
      localisation->Add(new SettingEntry("locale.units_power"));
      localisation->Add(new SettingEntry("locale.units_weight"));
      localisation->Add(new SettingEntry("locale.units_volume"));
      localisation->Add(new SettingEntry("locale.units_force"));
      localisation->Add(new SettingEntry("locale.units_height"));
      localisation->Add(new SettingEntry("gui.date_format_in_default_names"));
    }
 
    SettingsPage *graphics = main->Add(new SettingsPage(STR_CONFIG_SETTING_GRAPHICS));
    {
      graphics->Add(new SettingEntry("gui.zoom_min"));
      graphics->Add(new SettingEntry("gui.zoom_max"));
      graphics->Add(new SettingEntry("gui.sprite_zoom_min"));
      graphics->Add(new SettingEntry("gui.smallmap_land_colour"));
      graphics->Add(new SettingEntry("gui.linkgraph_colours"));
      graphics->Add(new SettingEntry("gui.graph_line_thickness"));
    }
 
    SettingsPage *sound = main->Add(new SettingsPage(STR_CONFIG_SETTING_SOUND));
    {
      sound->Add(new SettingEntry("sound.click_beep"));
      sound->Add(new SettingEntry("sound.confirm"));
      sound->Add(new SettingEntry("sound.news_ticker"));
      sound->Add(new SettingEntry("sound.news_full"));
      sound->Add(new SettingEntry("sound.new_year"));
      sound->Add(new SettingEntry("sound.disaster"));
      sound->Add(new SettingEntry("sound.vehicle"));
      sound->Add(new SettingEntry("sound.ambient"));
    }
 
    SettingsPage *interface = main->Add(new SettingsPage(STR_CONFIG_SETTING_INTERFACE));
    {
      SettingsPage *general = interface->Add(new SettingsPage(STR_CONFIG_SETTING_INTERFACE_GENERAL));
      {
        general->Add(new SettingEntry("gui.osk_activation"));
        general->Add(new SettingEntry("gui.hover_delay_ms"));
        general->Add(new SettingEntry("gui.errmsg_duration"));
        general->Add(new SettingEntry("gui.window_snap_radius"));
        general->Add(new SettingEntry("gui.window_soft_limit"));
        general->Add(new SettingEntry("gui.right_click_wnd_close"));
      }
 
      SettingsPage *viewports = interface->Add(new SettingsPage(STR_CONFIG_SETTING_INTERFACE_VIEWPORTS));
      {
        viewports->Add(new SettingEntry("gui.auto_scrolling"));
        viewports->Add(new SettingEntry("gui.scroll_mode"));
        viewports->Add(new SettingEntry("gui.smooth_scroll"));
        /* While the horizontal scrollwheel scrolling is written as general code, only
         *  the cocoa (OSX) driver generates input for it.
         *  Since it's also able to completely disable the scrollwheel will we display it on all platforms anyway */
        viewports->Add(new SettingEntry("gui.scrollwheel_scrolling"));
        viewports->Add(new SettingEntry("gui.scrollwheel_multiplier"));
#ifdef __APPLE__
        /* We might need to emulate a right mouse button on mac */
        viewports->Add(new SettingEntry("gui.right_mouse_btn_emulation"));
#endif
        viewports->Add(new SettingEntry("gui.population_in_label"));
        viewports->Add(new SettingEntry("gui.liveries"));
        viewports->Add(new SettingEntry("construction.train_signal_side"));
        viewports->Add(new SettingEntry("gui.measure_tooltip"));
        viewports->Add(new SettingEntry("gui.loading_indicators"));
        viewports->Add(new SettingEntry("gui.show_track_reservation"));
      }
 
      SettingsPage *construction = interface->Add(new SettingsPage(STR_CONFIG_SETTING_INTERFACE_CONSTRUCTION));
      {
        construction->Add(new SettingEntry("gui.link_terraform_toolbar"));
        construction->Add(new SettingEntry("gui.persistent_buildingtools"));
        construction->Add(new SettingEntry("gui.default_rail_type"));
        construction->Add(new SettingEntry("gui.semaphore_build_before"));
        construction->Add(new SettingEntry("gui.signal_gui_mode"));
        construction->Add(new SettingEntry("gui.cycle_signal_types"));
        construction->Add(new SettingEntry("gui.drag_signals_fixed_distance"));
        construction->Add(new SettingEntry("gui.auto_remove_signals"));
      }
 
      interface->Add(new SettingEntry("gui.toolbar_pos"));
      interface->Add(new SettingEntry("gui.statusbar_pos"));
      interface->Add(new SettingEntry("gui.prefer_teamchat"));
      interface->Add(new SettingEntry("gui.advanced_vehicle_list"));
      interface->Add(new SettingEntry("gui.timetable_mode"));
      interface->Add(new SettingEntry("gui.timetable_arrival_departure"));
      interface->Add(new SettingEntry("gui.show_newgrf_name"));
      interface->Add(new SettingEntry("gui.show_cargo_in_vehicle_lists"));
    }
 
    SettingsPage *advisors = main->Add(new SettingsPage(STR_CONFIG_SETTING_ADVISORS));
    {
      advisors->Add(new SettingEntry("gui.coloured_news_year"));
      advisors->Add(new SettingEntry("news_display.general"));
      advisors->Add(new SettingEntry("news_display.new_vehicles"));
      advisors->Add(new SettingEntry("news_display.accident"));
      advisors->Add(new SettingEntry("news_display.accident_other"));
      advisors->Add(new SettingEntry("news_display.company_info"));
      advisors->Add(new SettingEntry("news_display.acceptance"));
      advisors->Add(new SettingEntry("news_display.arrival_player"));
      advisors->Add(new SettingEntry("news_display.arrival_other"));
      advisors->Add(new SettingEntry("news_display.advice"));
      advisors->Add(new SettingEntry("gui.order_review_system"));
      advisors->Add(new SettingEntry("gui.vehicle_income_warn"));
      advisors->Add(new SettingEntry("gui.lost_vehicle_warn"));
      advisors->Add(new SettingEntry("gui.old_vehicle_warn"));
      advisors->Add(new SettingEntry("gui.show_finances"));
      advisors->Add(new SettingEntry("news_display.economy"));
      advisors->Add(new SettingEntry("news_display.subsidies"));
      advisors->Add(new SettingEntry("news_display.open"));
      advisors->Add(new SettingEntry("news_display.close"));
      advisors->Add(new SettingEntry("news_display.production_player"));
      advisors->Add(new SettingEntry("news_display.production_other"));
      advisors->Add(new SettingEntry("news_display.production_nobody"));
    }
 
    SettingsPage *company = main->Add(new SettingsPage(STR_CONFIG_SETTING_COMPANY));
    {
      company->Add(new SettingEntry("gui.starting_colour"));
      company->Add(new SettingEntry("gui.starting_colour_secondary"));
      company->Add(new SettingEntry("company.engine_renew"));
      company->Add(new SettingEntry("company.engine_renew_months"));
      company->Add(new SettingEntry("company.engine_renew_money"));
      company->Add(new SettingEntry("vehicle.servint_ispercent"));
      company->Add(new SettingEntry("vehicle.servint_trains"));
      company->Add(new SettingEntry("vehicle.servint_roadveh"));
      company->Add(new SettingEntry("vehicle.servint_ships"));
      company->Add(new SettingEntry("vehicle.servint_aircraft"));
    }
 
    SettingsPage *accounting = main->Add(new SettingsPage(STR_CONFIG_SETTING_ACCOUNTING));
    {
      accounting->Add(new SettingEntry("difficulty.infinite_money"));
      accounting->Add(new SettingEntry("economy.inflation"));
      accounting->Add(new SettingEntry("difficulty.initial_interest"));
      accounting->Add(new SettingEntry("difficulty.max_loan"));
      accounting->Add(new SettingEntry("difficulty.subsidy_multiplier"));
      accounting->Add(new SettingEntry("difficulty.subsidy_duration"));
      accounting->Add(new SettingEntry("economy.feeder_payment_share"));
      accounting->Add(new SettingEntry("economy.infrastructure_maintenance"));
      accounting->Add(new SettingEntry("difficulty.vehicle_costs"));
      accounting->Add(new SettingEntry("difficulty.construction_cost"));
    }
 
    SettingsPage *vehicles = main->Add(new SettingsPage(STR_CONFIG_SETTING_VEHICLES));
    {
      SettingsPage *physics = vehicles->Add(new SettingsPage(STR_CONFIG_SETTING_VEHICLES_PHYSICS));
      {
        physics->Add(new SettingEntry("vehicle.train_acceleration_model"));
        physics->Add(new SettingEntry("vehicle.train_slope_steepness"));
        physics->Add(new SettingEntry("vehicle.wagon_speed_limits"));
        physics->Add(new SettingEntry("vehicle.freight_trains"));
        physics->Add(new SettingEntry("vehicle.roadveh_acceleration_model"));
        physics->Add(new SettingEntry("vehicle.roadveh_slope_steepness"));
        physics->Add(new SettingEntry("vehicle.smoke_amount"));
        physics->Add(new SettingEntry("vehicle.plane_speed"));
      }
 
      SettingsPage *routing = vehicles->Add(new SettingsPage(STR_CONFIG_SETTING_VEHICLES_ROUTING));
      {
        routing->Add(new SettingEntry("vehicle.road_side"));
        routing->Add(new SettingEntry("difficulty.line_reverse_mode"));
        routing->Add(new SettingEntry("pf.reverse_at_signals"));
        routing->Add(new SettingEntry("pf.forbid_90_deg"));
      }
 
      SettingsPage *orders = vehicles->Add(new SettingsPage(STR_CONFIG_SETTING_VEHICLES_ORDERS));
      {
        orders->Add(new SettingEntry("gui.new_nonstop"));
        orders->Add(new SettingEntry("gui.quick_goto"));
        orders->Add(new SettingEntry("gui.stop_location"));
      }
    }
 
    SettingsPage *limitations = main->Add(new SettingsPage(STR_CONFIG_SETTING_LIMITATIONS));
    {
      limitations->Add(new SettingEntry("construction.command_pause_level"));
      limitations->Add(new SettingEntry("construction.autoslope"));
      limitations->Add(new SettingEntry("construction.extra_dynamite"));
      limitations->Add(new SettingEntry("construction.map_height_limit"));
      limitations->Add(new SettingEntry("construction.max_bridge_length"));
      limitations->Add(new SettingEntry("construction.max_bridge_height"));
      limitations->Add(new SettingEntry("construction.max_tunnel_length"));
      limitations->Add(new SettingEntry("station.never_expire_airports"));
      limitations->Add(new SettingEntry("vehicle.never_expire_vehicles"));
      limitations->Add(new SettingEntry("vehicle.max_trains"));
      limitations->Add(new SettingEntry("vehicle.max_roadveh"));
      limitations->Add(new SettingEntry("vehicle.max_aircraft"));
      limitations->Add(new SettingEntry("vehicle.max_ships"));
      limitations->Add(new SettingEntry("vehicle.max_train_length"));
      limitations->Add(new SettingEntry("station.station_spread"));
      limitations->Add(new SettingEntry("station.distant_join_stations"));
      limitations->Add(new SettingEntry("station.modified_catchment"));
      limitations->Add(new SettingEntry("construction.road_stop_on_town_road"));
      limitations->Add(new SettingEntry("construction.road_stop_on_competitor_road"));
      limitations->Add(new SettingEntry("construction.crossing_with_competitor"));
      limitations->Add(new SettingEntry("vehicle.disable_elrails"));
      limitations->Add(new SettingEntry("order.station_length_loading_penalty"));
    }
 
    SettingsPage *disasters = main->Add(new SettingsPage(STR_CONFIG_SETTING_ACCIDENTS));
    {
      disasters->Add(new SettingEntry("difficulty.disasters"));
      disasters->Add(new SettingEntry("difficulty.economy"));
      disasters->Add(new SettingEntry("vehicle.plane_crashes"));
      disasters->Add(new SettingEntry("difficulty.vehicle_breakdowns"));
      disasters->Add(new SettingEntry("order.no_servicing_if_no_breakdowns"));
      disasters->Add(new SettingEntry("order.serviceathelipad"));
    }
 
    SettingsPage *genworld = main->Add(new SettingsPage(STR_CONFIG_SETTING_GENWORLD));
    {
      genworld->Add(new SettingEntry("game_creation.landscape"));
      genworld->Add(new SettingEntry("game_creation.land_generator"));
      genworld->Add(new SettingEntry("difficulty.terrain_type"));
      genworld->Add(new SettingEntry("game_creation.tgen_smoothness"));
      genworld->Add(new SettingEntry("game_creation.variety"));
      genworld->Add(new SettingEntry("game_creation.snow_coverage"));
      genworld->Add(new SettingEntry("game_creation.snow_line_height"));
      genworld->Add(new SettingEntry("game_creation.desert_coverage"));
      genworld->Add(new SettingEntry("game_creation.amount_of_rivers"));
    }
 
    SettingsPage *environment = main->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT));
    {
      SettingsPage *time = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_TIME));
      {
        time->Add(new SettingEntry("economy.timekeeping_units"));
        time->Add(new SettingEntry("economy.minutes_per_calendar_year"));
        time->Add(new SettingEntry("game_creation.ending_year"));
        time->Add(new SettingEntry("gui.pause_on_newgame"));
        time->Add(new SettingEntry("gui.fast_forward_speed_limit"));
      }
 
      SettingsPage *authorities = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_AUTHORITIES));
      {
        authorities->Add(new SettingEntry("difficulty.town_council_tolerance"));
        authorities->Add(new SettingEntry("economy.bribe"));
        authorities->Add(new SettingEntry("economy.exclusive_rights"));
        authorities->Add(new SettingEntry("economy.fund_roads"));
        authorities->Add(new SettingEntry("economy.fund_buildings"));
        authorities->Add(new SettingEntry("economy.station_noise_level"));
      }
 
      SettingsPage *towns = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_TOWNS));
      {
        towns->Add(new SettingEntry("economy.town_cargo_scale"));
        towns->Add(new SettingEntry("economy.town_growth_rate"));
        towns->Add(new SettingEntry("economy.allow_town_roads"));
        towns->Add(new SettingEntry("economy.allow_town_level_crossings"));
        towns->Add(new SettingEntry("economy.found_town"));
        towns->Add(new SettingEntry("economy.town_layout"));
        towns->Add(new SettingEntry("economy.larger_towns"));
        towns->Add(new SettingEntry("economy.initial_city_size"));
        towns->Add(new SettingEntry("economy.town_cargogen_mode"));
      }
 
      SettingsPage *industries = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_INDUSTRIES));
      {
        industries->Add(new SettingEntry("economy.industry_cargo_scale"));
        industries->Add(new SettingEntry("difficulty.industry_density"));
        industries->Add(new SettingEntry("construction.raw_industry_construction"));
        industries->Add(new SettingEntry("construction.industry_platform"));
        industries->Add(new SettingEntry("economy.multiple_industry_per_town"));
        industries->Add(new SettingEntry("game_creation.oil_refinery_limit"));
        industries->Add(new SettingEntry("economy.type"));
        industries->Add(new SettingEntry("station.serve_neutral_industries"));
      }
 
      SettingsPage *cdist = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_CARGODIST));
      {
        cdist->Add(new SettingEntry("linkgraph.recalc_time"));
        cdist->Add(new SettingEntry("linkgraph.recalc_interval"));
        cdist->Add(new SettingEntry("linkgraph.distribution_pax"));
        cdist->Add(new SettingEntry("linkgraph.distribution_mail"));
        cdist->Add(new SettingEntry("linkgraph.distribution_armoured"));
        cdist->Add(new SettingEntry("linkgraph.distribution_default"));
        cdist->Add(new SettingEntry("linkgraph.accuracy"));
        cdist->Add(new SettingEntry("linkgraph.demand_distance"));
        cdist->Add(new SettingEntry("linkgraph.demand_size"));
        cdist->Add(new SettingEntry("linkgraph.short_path_saturation"));
      }
 
      SettingsPage *trees = environment->Add(new SettingsPage(STR_CONFIG_SETTING_ENVIRONMENT_TREES));
      {
        trees->Add(new SettingEntry("game_creation.tree_placer"));
        trees->Add(new SettingEntry("construction.extra_tree_placement"));
      }
    }
 
    SettingsPage *ai = main->Add(new SettingsPage(STR_CONFIG_SETTING_AI));
    {
      SettingsPage *npc = ai->Add(new SettingsPage(STR_CONFIG_SETTING_AI_NPC));
      {
        npc->Add(new SettingEntry("script.script_max_opcode_till_suspend"));
        npc->Add(new SettingEntry("script.script_max_memory_megabytes"));
        npc->Add(new SettingEntry("difficulty.competitor_speed"));
        npc->Add(new SettingEntry("ai.ai_in_multiplayer"));
        npc->Add(new SettingEntry("ai.ai_disable_veh_train"));
        npc->Add(new SettingEntry("ai.ai_disable_veh_roadveh"));
        npc->Add(new SettingEntry("ai.ai_disable_veh_aircraft"));
        npc->Add(new SettingEntry("ai.ai_disable_veh_ship"));
      }
 
      ai->Add(new SettingEntry("economy.give_money"));
    }
 
    SettingsPage *network = main->Add(new SettingsPage(STR_CONFIG_SETTING_NETWORK));
    {
      network->Add(new SettingEntry("network.use_relay_service"));
    }
 
    main->Init();
  }
  return *main;
}
 
static const StringID _game_settings_restrict_dropdown[] = {
  STR_CONFIG_SETTING_RESTRICT_BASIC,                            // RM_BASIC
  STR_CONFIG_SETTING_RESTRICT_ADVANCED,                         // RM_ADVANCED
  STR_CONFIG_SETTING_RESTRICT_ALL,                              // RM_ALL
  STR_CONFIG_SETTING_RESTRICT_CHANGED_AGAINST_DEFAULT,          // RM_CHANGED_AGAINST_DEFAULT
  STR_CONFIG_SETTING_RESTRICT_CHANGED_AGAINST_NEW,              // RM_CHANGED_AGAINST_NEW
};
static_assert(lengthof(_game_settings_restrict_dropdown) == RM_END);
 
enum WarnHiddenResult {
  WHR_NONE,          
  WHR_CATEGORY,      
  WHR_TYPE,          
  WHR_CATEGORY_TYPE, 
};
 
static void ResetAllSettingsConfirmationCallback(Window *w, bool confirmed)
{
  if (confirmed) {
    GetSettingsTree().ResetAll();
    GetSettingsTree().FoldAll();
    w->InvalidateData();
  }
}
 
struct GameSettingsWindow : Window {
  static GameSettings *settings_ptr; 
 
  SettingEntry *valuewindow_entry;   
  SettingEntry *clicked_entry;       
  SettingEntry *last_clicked;        
  SettingEntry *valuedropdown_entry; 
  bool closing_dropdown;             
 
  SettingFilter filter;              
  QueryString filter_editbox;        
  bool manually_changed_folding;     
  WarnHiddenResult warn_missing;     
  int warn_lines;                    
 
  Scrollbar *vscroll;
 
  GameSettingsWindow(WindowDesc &desc) : Window(desc), filter_editbox(50)
  {
    this->warn_missing = WHR_NONE;
    this->warn_lines = 0;
    this->filter.mode = (RestrictionMode)_settings_client.gui.settings_restriction_mode;
    this->filter.min_cat = RM_ALL;
    this->filter.type = ST_ALL;
    this->filter.type_hides = false;
    this->settings_ptr = &GetGameSettings();
 
    GetSettingsTree().FoldAll(); // Close all sub-pages
 
    this->valuewindow_entry = nullptr; // No setting entry for which a entry window is opened
    this->clicked_entry = nullptr; // No numeric setting buttons are depressed
    this->last_clicked = nullptr;
    this->valuedropdown_entry = nullptr;
    this->closing_dropdown = false;
    this->manually_changed_folding = false;
 
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_GS_SCROLLBAR);
    this->FinishInitNested(WN_GAME_OPTIONS_GAME_SETTINGS);
 
    this->querystrings[WID_GS_FILTER] = &this->filter_editbox;
    this->filter_editbox.cancel_button = QueryString::ACTION_CLEAR;
    this->SetFocusedWidget(WID_GS_FILTER);
 
    this->InvalidateData();
  }
 
  void OnInit() override
  {
    _circle_size = maxdim(GetSpriteSize(SPR_CIRCLE_FOLDED), GetSpriteSize(SPR_CIRCLE_UNFOLDED));
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      case WID_GS_OPTIONSPANEL:
        resize.height = SETTING_HEIGHT = std::max({(int)_circle_size.height, SETTING_BUTTON_HEIGHT, GetCharacterHeight(FS_NORMAL)}) + WidgetDimensions::scaled.vsep_normal;
        resize.width = 1;
 
        size.height = 5 * resize.height + WidgetDimensions::scaled.framerect.Vertical();
        break;
 
      case WID_GS_HELP_TEXT: {
        static const StringID setting_types[] = {
          STR_CONFIG_SETTING_TYPE_CLIENT,
          STR_CONFIG_SETTING_TYPE_COMPANY_MENU, STR_CONFIG_SETTING_TYPE_COMPANY_INGAME,
          STR_CONFIG_SETTING_TYPE_GAME_MENU, STR_CONFIG_SETTING_TYPE_GAME_INGAME,
        };
        for (const auto &setting_type : setting_types) {
          SetDParam(0, setting_type);
          size.width = std::max(size.width, GetStringBoundingBox(STR_CONFIG_SETTING_TYPE).width + padding.width);
        }
        size.height = 2 * GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal +
            std::max(size.height, GetSettingsTree().GetMaxHelpHeight(size.width));
        break;
      }
 
      case WID_GS_RESTRICT_CATEGORY:
      case WID_GS_RESTRICT_TYPE:
        size.width = std::max(GetStringBoundingBox(STR_CONFIG_SETTING_RESTRICT_CATEGORY).width, GetStringBoundingBox(STR_CONFIG_SETTING_RESTRICT_TYPE).width);
        break;
 
      default:
        break;
    }
  }
 
  void OnPaint() override
  {
    if (this->closing_dropdown) {
      this->closing_dropdown = false;
      assert(this->valuedropdown_entry != nullptr);
      this->valuedropdown_entry->SetButtons(0);
      this->valuedropdown_entry = nullptr;
    }
 
    /* Reserve the correct number of lines for the 'some search results are hidden' notice in the central settings display panel. */
    const Rect panel = this->GetWidget<NWidgetBase>(WID_GS_OPTIONSPANEL)->GetCurrentRect().Shrink(WidgetDimensions::scaled.frametext);
    StringID warn_str = STR_CONFIG_SETTING_CATEGORY_HIDES - 1 + this->warn_missing;
    int new_warn_lines;
    if (this->warn_missing == WHR_NONE) {
      new_warn_lines = 0;
    } else {
      SetDParam(0, _game_settings_restrict_dropdown[this->filter.min_cat]);
      new_warn_lines = GetStringLineCount(warn_str, panel.Width());
    }
    if (this->warn_lines != new_warn_lines) {
      this->vscroll->SetCount(this->vscroll->GetCount() - this->warn_lines + new_warn_lines);
      this->warn_lines = new_warn_lines;
    }
 
    this->DrawWidgets();
 
    /* Draw the 'some search results are hidden' notice. */
    if (this->warn_missing != WHR_NONE) {
      SetDParam(0, _game_settings_restrict_dropdown[this->filter.min_cat]);
      DrawStringMultiLine(panel.WithHeight(this->warn_lines * GetCharacterHeight(FS_NORMAL)), warn_str, TC_FROMSTRING, SA_CENTER);
    }
  }
 
  void SetStringParameters(WidgetID widget) const override
  {
    switch (widget) {
      case WID_GS_RESTRICT_DROPDOWN:
        SetDParam(0, _game_settings_restrict_dropdown[this->filter.mode]);
        break;
 
      case WID_GS_TYPE_DROPDOWN:
        switch (this->filter.type) {
          case ST_GAME:    SetDParam(0, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_INGAME); break;
          case ST_COMPANY: SetDParam(0, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_INGAME); break;
          case ST_CLIENT:  SetDParam(0, STR_CONFIG_SETTING_TYPE_DROPDOWN_CLIENT); break;
          default:         SetDParam(0, STR_CONFIG_SETTING_TYPE_DROPDOWN_ALL); break;
        }
        break;
    }
  }
 
  DropDownList BuildDropDownList(WidgetID widget) const
  {
    DropDownList list;
    switch (widget) {
      case WID_GS_RESTRICT_DROPDOWN:
        for (int mode = 0; mode != RM_END; mode++) {
          /* If we are in adv. settings screen for the new game's settings,
           * we don't want to allow comparing with new game's settings. */
          bool disabled = mode == RM_CHANGED_AGAINST_NEW && settings_ptr == &_settings_newgame;
 
          list.push_back(MakeDropDownListStringItem(_game_settings_restrict_dropdown[mode], mode, disabled));
        }
        break;
 
      case WID_GS_TYPE_DROPDOWN:
        list.push_back(MakeDropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_ALL, ST_ALL));
        list.push_back(MakeDropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_INGAME, ST_GAME));
        list.push_back(MakeDropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_INGAME, ST_COMPANY));
        list.push_back(MakeDropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_CLIENT, ST_CLIENT));
        break;
    }
    return list;
  }
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_GS_OPTIONSPANEL: {
        Rect tr = r.Shrink(WidgetDimensions::scaled.frametext, WidgetDimensions::scaled.framerect);
        tr.top += this->warn_lines * SETTING_HEIGHT;
        uint last_row = this->vscroll->GetPosition() + this->vscroll->GetCapacity() - this->warn_lines;
        int next_row = GetSettingsTree().Draw(settings_ptr, tr.left, tr.right, tr.top,
            this->vscroll->GetPosition(), last_row, this->last_clicked);
        if (next_row == 0) DrawString(tr, STR_CONFIG_SETTINGS_NONE);
        break;
      }
 
      case WID_GS_HELP_TEXT:
        if (this->last_clicked != nullptr) {
          const IntSettingDesc *sd = this->last_clicked->setting;
 
          Rect tr = r;
          switch (sd->GetType()) {
            case ST_COMPANY: SetDParam(0, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_COMPANY_INGAME); break;
            case ST_CLIENT:  SetDParam(0, STR_CONFIG_SETTING_TYPE_CLIENT); break;
            case ST_GAME:    SetDParam(0, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_GAME_MENU : STR_CONFIG_SETTING_TYPE_GAME_INGAME); break;
            default: NOT_REACHED();
          }
          DrawString(tr, STR_CONFIG_SETTING_TYPE);
          tr.top += GetCharacterHeight(FS_NORMAL);
 
          int32_t def_val = sd->get_def_cb != nullptr ? sd->get_def_cb() : sd->def;
          sd->SetValueDParams(0, def_val);
          DrawString(tr, STR_CONFIG_SETTING_DEFAULT_VALUE);
          tr.top += GetCharacterHeight(FS_NORMAL) + WidgetDimensions::scaled.vsep_normal;
 
          DrawStringMultiLine(tr, sd->GetHelp(), TC_WHITE);
        }
        break;
 
      default:
        break;
    }
  }
 
  void SetDisplayedHelpText(SettingEntry *pe)
  {
    if (this->last_clicked != pe) this->SetDirty();
    this->last_clicked = pe;
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_GS_EXPAND_ALL:
        this->manually_changed_folding = true;
        GetSettingsTree().UnFoldAll();
        this->InvalidateData();
        break;
 
      case WID_GS_COLLAPSE_ALL:
        this->manually_changed_folding = true;
        GetSettingsTree().FoldAll();
        this->InvalidateData();
        break;
 
      case WID_GS_RESET_ALL:
        ShowQuery(
          STR_CONFIG_SETTING_RESET_ALL_CONFIRMATION_DIALOG_CAPTION,
          STR_CONFIG_SETTING_RESET_ALL_CONFIRMATION_DIALOG_TEXT,
          this,
          ResetAllSettingsConfirmationCallback
        );
        break;
 
      case WID_GS_RESTRICT_DROPDOWN: {
        DropDownList list = this->BuildDropDownList(widget);
        if (!list.empty()) {
          ShowDropDownList(this, std::move(list), this->filter.mode, widget);
        }
        break;
      }
 
      case WID_GS_TYPE_DROPDOWN: {
        DropDownList list = this->BuildDropDownList(widget);
        if (!list.empty()) {
          ShowDropDownList(this, std::move(list), this->filter.type, widget);
        }
        break;
      }
    }
 
    if (widget != WID_GS_OPTIONSPANEL) return;
 
    int32_t btn = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_GS_OPTIONSPANEL, WidgetDimensions::scaled.framerect.top);
    if (btn == INT32_MAX || btn < this->warn_lines) return;
    btn -= this->warn_lines;
 
    uint cur_row = 0;
    BaseSettingEntry *clicked_entry = GetSettingsTree().FindEntry(btn, &cur_row);
 
    if (clicked_entry == nullptr) return;  // Clicked below the last setting of the page
 
    int x = (_current_text_dir == TD_RTL ? this->width - 1 - pt.x : pt.x) - WidgetDimensions::scaled.frametext.left - (clicked_entry->level + 1) * WidgetDimensions::scaled.hsep_indent;  // Shift x coordinate
    if (x < 0) return;  // Clicked left of the entry
 
    SettingsPage *clicked_page = dynamic_cast<SettingsPage*>(clicked_entry);
    if (clicked_page != nullptr) {
      this->SetDisplayedHelpText(nullptr);
      clicked_page->folded = !clicked_page->folded; // Flip 'folded'-ness of the sub-page
 
      this->manually_changed_folding = true;
 
      this->InvalidateData();
      return;
    }
 
    SettingEntry *pe = dynamic_cast<SettingEntry*>(clicked_entry);
    assert(pe != nullptr);
    const IntSettingDesc *sd = pe->setting;
 
    /* return if action is only active in network, or only settable by server */
    if (!sd->IsEditable()) {
      this->SetDisplayedHelpText(pe);
      return;
    }
 
    int32_t value = sd->Read(ResolveObject(settings_ptr, sd));
 
    /* clicked on the icon on the left side. Either scroller, bool on/off or dropdown */
    if (x < SETTING_BUTTON_WIDTH && (sd->flags & SF_GUI_DROPDOWN)) {
      this->SetDisplayedHelpText(pe);
 
      if (this->valuedropdown_entry == pe) {
        /* unclick the dropdown */
        this->CloseChildWindows(WC_DROPDOWN_MENU);
        this->closing_dropdown = false;
        this->valuedropdown_entry->SetButtons(0);
        this->valuedropdown_entry = nullptr;
      } else {
        if (this->valuedropdown_entry != nullptr) this->valuedropdown_entry->SetButtons(0);
        this->closing_dropdown = false;
 
        const NWidgetBase *wid = this->GetWidget<NWidgetBase>(WID_GS_OPTIONSPANEL);
        int rel_y = (pt.y - wid->pos_y - WidgetDimensions::scaled.framerect.top) % wid->resize_y;
 
        Rect wi_rect;
        wi_rect.left = pt.x - (_current_text_dir == TD_RTL ? SETTING_BUTTON_WIDTH - 1 - x : x);
        wi_rect.right = wi_rect.left + SETTING_BUTTON_WIDTH - 1;
        wi_rect.top = pt.y - rel_y + (SETTING_HEIGHT - SETTING_BUTTON_HEIGHT) / 2;
        wi_rect.bottom = wi_rect.top + SETTING_BUTTON_HEIGHT - 1;
 
        /* For dropdowns we also have to check the y position thoroughly, the mouse may not above the just opening dropdown */
        if (pt.y >= wi_rect.top && pt.y <= wi_rect.bottom) {
          this->valuedropdown_entry = pe;
          this->valuedropdown_entry->SetButtons(SEF_LEFT_DEPRESSED);
 
          DropDownList list;
          for (int i = sd->min; i <= (int)sd->max; i++) {
            sd->SetValueDParams(0, i);
            list.push_back(MakeDropDownListStringItem(STR_JUST_STRING2, i));
          }
 
          ShowDropDownListAt(this, std::move(list), value, WID_GS_SETTING_DROPDOWN, wi_rect, COLOUR_ORANGE);
        }
      }
      this->SetDirty();
    } else if (x < SETTING_BUTTON_WIDTH) {
      this->SetDisplayedHelpText(pe);
      int32_t oldvalue = value;
 
      if (sd->IsBoolSetting()) {
        value ^= 1;
      } else {
        /* Add a dynamic step-size to the scroller. In a maximum of
         * 50-steps you should be able to get from min to max,
         * unless specified otherwise in the 'interval' variable
         * of the current setting. */
        uint32_t step = (sd->interval == 0) ? ((sd->max - sd->min) / 50) : sd->interval;
        if (step == 0) step = 1;
 
        /* don't allow too fast scrolling */
        if ((this->flags & WF_TIMEOUT) && this->timeout_timer > 1) {
          _left_button_clicked = false;
          return;
        }
 
        /* Increase or decrease the value and clamp it to extremes */
        if (x >= SETTING_BUTTON_WIDTH / 2) {
          value += step;
          if (sd->min < 0) {
            assert((int32_t)sd->max >= 0);
            if (value > (int32_t)sd->max) value = (int32_t)sd->max;
          } else {
            if ((uint32_t)value > sd->max) value = (int32_t)sd->max;
          }
          if (value < sd->min) value = sd->min; // skip between "disabled" and minimum
        } else {
          value -= step;
          if (value < sd->min) value = (sd->flags & SF_GUI_0_IS_SPECIAL) ? 0 : sd->min;
        }
 
        /* Set up scroller timeout for numeric values */
        if (value != oldvalue) {
          if (this->clicked_entry != nullptr) { // Release previous buttons if any
            this->clicked_entry->SetButtons(0);
          }
          this->clicked_entry = pe;
          this->clicked_entry->SetButtons((x >= SETTING_BUTTON_WIDTH / 2) != (_current_text_dir == TD_RTL) ? SEF_RIGHT_DEPRESSED : SEF_LEFT_DEPRESSED);
          this->SetTimeout();
          _left_button_clicked = false;
        }
      }
 
      if (value != oldvalue) {
        SetSettingValue(sd, value);
        this->SetDirty();
      }
    } else {
      /* Only open editbox if clicked for the second time, and only for types where it is sensible for. */
      if (this->last_clicked == pe && !sd->IsBoolSetting() && !(sd->flags & SF_GUI_DROPDOWN)) {
        int64_t value64 = value;
        /* Show the correct currency-translated value */
        if (sd->flags & SF_GUI_CURRENCY) value64 *= GetCurrency().rate;
 
        CharSetFilter charset_filter = CS_NUMERAL; //default, only numeric input allowed
        if (sd->min < 0) charset_filter = CS_NUMERAL_SIGNED; // special case, also allow '-' sign for negative input
 
        this->valuewindow_entry = pe;
        SetDParam(0, value64);
        /* Limit string length to 14 so that MAX_INT32 * max currency rate doesn't exceed MAX_INT64. */
        ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 15, this, charset_filter, QSF_ENABLE_DEFAULT);
      }
      this->SetDisplayedHelpText(pe);
    }
  }
 
  void OnTimeout() override
  {
    if (this->clicked_entry != nullptr) { // On timeout, release any depressed buttons
      this->clicked_entry->SetButtons(0);
      this->clicked_entry = nullptr;
      this->SetDirty();
    }
  }
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    /* The user pressed cancel */
    if (!str.has_value()) return;
 
    assert(this->valuewindow_entry != nullptr);
    const IntSettingDesc *sd = this->valuewindow_entry->setting;
 
    int32_t value;
    if (!str->empty()) {
      long long llvalue = atoll(str->c_str());
 
      /* Save the correct currency-translated value */
      if (sd->flags & SF_GUI_CURRENCY) llvalue /= GetCurrency().rate;
 
      value = ClampTo<int32_t>(llvalue);
    } else if (sd->get_def_cb != nullptr) {
      value = sd->get_def_cb();
    } else {
      value = sd->def;
    }
 
    SetSettingValue(this->valuewindow_entry->setting, value);
    this->SetDirty();
  }
 
  void OnDropdownSelect(WidgetID widget, int index) override
  {
    switch (widget) {
      case WID_GS_RESTRICT_DROPDOWN:
        this->filter.mode = (RestrictionMode)index;
        if (this->filter.mode == RM_CHANGED_AGAINST_DEFAULT ||
            this->filter.mode == RM_CHANGED_AGAINST_NEW) {
 
          if (!this->manually_changed_folding) {
            /* Expand all when selecting 'changes'. Update the filter state first, in case it becomes less restrictive in some cases. */
            GetSettingsTree().UpdateFilterState(this->filter, false);
            GetSettingsTree().UnFoldAll();
          }
        } else {
          /* Non-'changes' filter. Save as default. */
          _settings_client.gui.settings_restriction_mode = this->filter.mode;
        }
        this->InvalidateData();
        break;
 
      case WID_GS_TYPE_DROPDOWN:
        this->filter.type = (SettingType)index;
        this->InvalidateData();
        break;
 
      case WID_GS_SETTING_DROPDOWN:
        /* Deal with drop down boxes on the panel. */
        assert(this->valuedropdown_entry != nullptr);
        const IntSettingDesc *sd = this->valuedropdown_entry->setting;
        assert(sd->flags & SF_GUI_DROPDOWN);
 
        SetSettingValue(sd, index);
        this->SetDirty();
        break;
    }
  }
 
  void OnDropdownClose(Point pt, WidgetID widget, int index, bool instant_close) override
  {
    if (widget != WID_GS_SETTING_DROPDOWN) {
      /* Normally the default implementation of OnDropdownClose() takes care of
       * a few things. We want that behaviour here too, but only for
       * "normal" dropdown boxes. The special dropdown boxes added for every
       * setting that needs one can't have this call. */
      Window::OnDropdownClose(pt, widget, index, instant_close);
    } else {
      /* We cannot raise the dropdown button just yet. OnClick needs some hint, whether
       * the same dropdown button was clicked again, and then not open the dropdown again.
       * So, we only remember that it was closed, and process it on the next OnPaint, which is
       * after OnClick. */
      assert(this->valuedropdown_entry != nullptr);
      this->closing_dropdown = true;
      this->SetDirty();
    }
  }
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
 
    /* Update which settings are to be visible. */
    RestrictionMode min_level = (this->filter.mode <= RM_ALL) ? this->filter.mode : RM_BASIC;
    this->filter.min_cat = min_level;
    this->filter.type_hides = false;
    GetSettingsTree().UpdateFilterState(this->filter, false);
 
    if (this->filter.string.IsEmpty()) {
      this->warn_missing = WHR_NONE;
    } else if (min_level < this->filter.min_cat) {
      this->warn_missing = this->filter.type_hides ? WHR_CATEGORY_TYPE : WHR_CATEGORY;
    } else {
      this->warn_missing = this->filter.type_hides ? WHR_TYPE : WHR_NONE;
    }
    this->vscroll->SetCount(GetSettingsTree().Length() + this->warn_lines);
 
    if (this->last_clicked != nullptr && !GetSettingsTree().IsVisible(this->last_clicked)) {
      this->SetDisplayedHelpText(nullptr);
    }
 
    bool all_folded = true;
    bool all_unfolded = true;
    GetSettingsTree().GetFoldingState(all_folded, all_unfolded);
    this->SetWidgetDisabledState(WID_GS_EXPAND_ALL, all_unfolded);
    this->SetWidgetDisabledState(WID_GS_COLLAPSE_ALL, all_folded);
  }
 
  void OnEditboxChanged(WidgetID wid) override
  {
    if (wid == WID_GS_FILTER) {
      this->filter.string.SetFilterTerm(this->filter_editbox.text.buf);
      if (!this->filter.string.IsEmpty() && !this->manually_changed_folding) {
        /* User never expanded/collapsed single pages and entered a filter term.
         * Expand everything, to save weird expand clicks, */
        GetSettingsTree().UnFoldAll();
      }
      this->InvalidateData();
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_GS_OPTIONSPANEL, WidgetDimensions::scaled.framerect.Vertical());
  }
};
 
GameSettings *GameSettingsWindow::settings_ptr = nullptr;
 
static constexpr NWidgetPart _nested_settings_selection_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
    NWidget(WWT_CAPTION, COLOUR_MAUVE), SetDataTip(STR_CONFIG_SETTING_TREE_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, COLOUR_MAUVE),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_MAUVE),
    NWidget(NWID_VERTICAL), SetPIP(WidgetDimensions::unscaled.frametext.top, WidgetDimensions::unscaled.vsep_normal, WidgetDimensions::unscaled.frametext.bottom),
      NWidget(NWID_HORIZONTAL), SetPIP(WidgetDimensions::unscaled.frametext.left, WidgetDimensions::unscaled.hsep_wide, WidgetDimensions::unscaled.frametext.right),
        NWidget(WWT_TEXT, COLOUR_MAUVE, WID_GS_RESTRICT_CATEGORY), SetDataTip(STR_CONFIG_SETTING_RESTRICT_CATEGORY, STR_NULL),
        NWidget(WWT_DROPDOWN, COLOUR_MAUVE, WID_GS_RESTRICT_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING, STR_CONFIG_SETTING_RESTRICT_DROPDOWN_HELPTEXT), SetFill(1, 0), SetResize(1, 0),
      EndContainer(),
      NWidget(NWID_HORIZONTAL), SetPIP(WidgetDimensions::unscaled.frametext.left, WidgetDimensions::unscaled.hsep_wide, WidgetDimensions::unscaled.frametext.right),
        NWidget(WWT_TEXT, COLOUR_MAUVE, WID_GS_RESTRICT_TYPE), SetDataTip(STR_CONFIG_SETTING_RESTRICT_TYPE, STR_NULL),
        NWidget(WWT_DROPDOWN, COLOUR_MAUVE, WID_GS_TYPE_DROPDOWN), SetMinimalSize(100, 12), SetDataTip(STR_JUST_STRING, STR_CONFIG_SETTING_TYPE_DROPDOWN_HELPTEXT), SetFill(1, 0), SetResize(1, 0),
      EndContainer(),
      NWidget(NWID_HORIZONTAL), SetPIP(WidgetDimensions::unscaled.frametext.left, WidgetDimensions::unscaled.hsep_wide, WidgetDimensions::unscaled.frametext.right),
        NWidget(WWT_TEXT, COLOUR_MAUVE), SetFill(0, 1), SetDataTip(STR_CONFIG_SETTING_FILTER_TITLE, STR_NULL),
        NWidget(WWT_EDITBOX, COLOUR_MAUVE, WID_GS_FILTER), SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
      EndContainer(),
    EndContainer(),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PANEL, COLOUR_MAUVE, WID_GS_OPTIONSPANEL), SetMinimalSize(400, 174), SetScrollbar(WID_GS_SCROLLBAR), EndContainer(),
    NWidget(NWID_VSCROLLBAR, COLOUR_MAUVE, WID_GS_SCROLLBAR),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_MAUVE),
    NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GS_HELP_TEXT), SetMinimalSize(300, 25), SetFill(1, 1), SetResize(1, 0),
        SetPadding(WidgetDimensions::unscaled.frametext),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_GS_EXPAND_ALL), SetDataTip(STR_CONFIG_SETTING_EXPAND_ALL, STR_NULL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_GS_COLLAPSE_ALL), SetDataTip(STR_CONFIG_SETTING_COLLAPSE_ALL, STR_NULL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_GS_RESET_ALL), SetDataTip(STR_CONFIG_SETTING_RESET_ALL, STR_NULL),
    NWidget(WWT_PANEL, COLOUR_MAUVE), SetFill(1, 0), SetResize(1, 0),
    EndContainer(),
    NWidget(WWT_RESIZEBOX, COLOUR_MAUVE),
  EndContainer(),
};
 
static WindowDesc _settings_selection_desc(
  WDP_CENTER, "settings", 510, 450,
  WC_GAME_OPTIONS, WC_NONE,
  0,
  _nested_settings_selection_widgets
);
 
void ShowGameSettings()
{
  CloseWindowByClass(WC_GAME_OPTIONS);
  new GameSettingsWindow(_settings_selection_desc);
}
 
 
void DrawArrowButtons(int x, int y, Colours button_colour, uint8_t state, bool clickable_left, bool clickable_right)
{
  int colour = GetColourGradient(button_colour, SHADE_DARKER);
  Dimension dim = NWidgetScrollbar::GetHorizontalDimension();
 
  Rect lr = {x,                  y, x + (int)dim.width     - 1, y + (int)dim.height - 1};
  Rect rr = {x + (int)dim.width, y, x + (int)dim.width * 2 - 1, y + (int)dim.height - 1};
 
  DrawFrameRect(lr, button_colour, (state == 1) ? FR_LOWERED : FR_NONE);
  DrawFrameRect(rr, button_colour, (state == 2) ? FR_LOWERED : FR_NONE);
  DrawSpriteIgnorePadding(SPR_ARROW_LEFT,  PAL_NONE, lr, SA_CENTER);
  DrawSpriteIgnorePadding(SPR_ARROW_RIGHT, PAL_NONE, rr, SA_CENTER);
 
  /* Grey out the buttons that aren't clickable */
  bool rtl = _current_text_dir == TD_RTL;
  if (rtl ? !clickable_right : !clickable_left) {
    GfxFillRect(lr.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
  }
  if (rtl ? !clickable_left : !clickable_right) {
    GfxFillRect(rr.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
  }
}
 
void DrawDropDownButton(int x, int y, Colours button_colour, bool state, bool clickable)
{
  int colour = GetColourGradient(button_colour, SHADE_DARKER);
 
  Rect r = {x, y, x + SETTING_BUTTON_WIDTH - 1, y + SETTING_BUTTON_HEIGHT - 1};
 
  DrawFrameRect(r, button_colour, state ? FR_LOWERED : FR_NONE);
  DrawSpriteIgnorePadding(SPR_ARROW_DOWN, PAL_NONE, r, SA_CENTER);
 
  if (!clickable) {
    GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
  }
}
 
void DrawBoolButton(int x, int y, bool state, bool clickable)
{
  static const Colours _bool_ctabs[2][2] = {{COLOUR_CREAM, COLOUR_RED}, {COLOUR_DARK_GREEN, COLOUR_GREEN}};
 
  Rect r = {x, y, x + SETTING_BUTTON_WIDTH - 1, y + SETTING_BUTTON_HEIGHT - 1};
  DrawFrameRect(r, _bool_ctabs[state][clickable], state ? FR_LOWERED : FR_NONE);
}
 
struct CustomCurrencyWindow : Window {
  int query_widget;
 
  CustomCurrencyWindow(WindowDesc &desc) : Window(desc)
  {
    this->InitNested();
 
    SetButtonState();
  }
 
  void SetButtonState()
  {
    this->SetWidgetDisabledState(WID_CC_RATE_DOWN, GetCustomCurrency().rate == 1);
    this->SetWidgetDisabledState(WID_CC_RATE_UP, GetCustomCurrency().rate == UINT16_MAX);
    this->SetWidgetDisabledState(WID_CC_YEAR_DOWN, GetCustomCurrency().to_euro == CF_NOEURO);
    this->SetWidgetDisabledState(WID_CC_YEAR_UP, GetCustomCurrency().to_euro == CalendarTime::MAX_YEAR);
  }
 
  void SetStringParameters(WidgetID widget) const override
  {
    switch (widget) {
      case WID_CC_RATE:      SetDParam(0, 1); SetDParam(1, 1);            break;
      case WID_CC_SEPARATOR: SetDParamStr(0, GetCustomCurrency().separator); break;
      case WID_CC_PREFIX:    SetDParamStr(0, GetCustomCurrency().prefix);    break;
      case WID_CC_SUFFIX:    SetDParamStr(0, GetCustomCurrency().suffix);    break;
      case WID_CC_YEAR:
        SetDParam(0, (GetCustomCurrency().to_euro != CF_NOEURO) ? STR_CURRENCY_SWITCH_TO_EURO : STR_CURRENCY_SWITCH_TO_EURO_NEVER);
        SetDParam(1, GetCustomCurrency().to_euro);
        break;
 
      case WID_CC_PREVIEW:
        SetDParam(0, 10000);
        break;
    }
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    switch (widget) {
      /* Set the appropriate width for the up/down buttons. */
      case WID_CC_RATE_DOWN:
      case WID_CC_RATE_UP:
      case WID_CC_YEAR_DOWN:
      case WID_CC_YEAR_UP:
        size = maxdim(size, {(uint)SETTING_BUTTON_WIDTH / 2, (uint)SETTING_BUTTON_HEIGHT});
        break;
 
      /* Set the appropriate width for the edit buttons. */
      case WID_CC_SEPARATOR_EDIT:
      case WID_CC_PREFIX_EDIT:
      case WID_CC_SUFFIX_EDIT:
        size = maxdim(size, {(uint)SETTING_BUTTON_WIDTH, (uint)SETTING_BUTTON_HEIGHT});
        break;
 
      /* Make sure the window is wide enough for the widest exchange rate */
      case WID_CC_RATE:
        SetDParam(0, 1);
        SetDParam(1, INT32_MAX);
        size = GetStringBoundingBox(STR_CURRENCY_EXCHANGE_RATE);
        break;
    }
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    int line = 0;
    int len = 0;
    StringID str = 0;
    CharSetFilter afilter = CS_ALPHANUMERAL;
 
    switch (widget) {
      case WID_CC_RATE_DOWN:
        if (GetCustomCurrency().rate > 1) GetCustomCurrency().rate--;
        if (GetCustomCurrency().rate == 1) this->DisableWidget(WID_CC_RATE_DOWN);
        this->EnableWidget(WID_CC_RATE_UP);
        break;
 
      case WID_CC_RATE_UP:
        if (GetCustomCurrency().rate < UINT16_MAX) GetCustomCurrency().rate++;
        if (GetCustomCurrency().rate == UINT16_MAX) this->DisableWidget(WID_CC_RATE_UP);
        this->EnableWidget(WID_CC_RATE_DOWN);
        break;
 
      case WID_CC_RATE:
        SetDParam(0, GetCustomCurrency().rate);
        str = STR_JUST_INT;
        len = 5;
        line = WID_CC_RATE;
        afilter = CS_NUMERAL;
        break;
 
      case WID_CC_SEPARATOR_EDIT:
      case WID_CC_SEPARATOR:
        SetDParamStr(0, GetCustomCurrency().separator);
        str = STR_JUST_RAW_STRING;
        len = 7;
        line = WID_CC_SEPARATOR;
        break;
 
      case WID_CC_PREFIX_EDIT:
      case WID_CC_PREFIX:
        SetDParamStr(0, GetCustomCurrency().prefix);
        str = STR_JUST_RAW_STRING;
        len = 15;
        line = WID_CC_PREFIX;
        break;
 
      case WID_CC_SUFFIX_EDIT:
      case WID_CC_SUFFIX:
        SetDParamStr(0, GetCustomCurrency().suffix);
        str = STR_JUST_RAW_STRING;
        len = 15;
        line = WID_CC_SUFFIX;
        break;
 
      case WID_CC_YEAR_DOWN:
        GetCustomCurrency().to_euro = (GetCustomCurrency().to_euro <= MIN_EURO_YEAR) ? CF_NOEURO : GetCustomCurrency().to_euro - 1;
        if (GetCustomCurrency().to_euro == CF_NOEURO) this->DisableWidget(WID_CC_YEAR_DOWN);
        this->EnableWidget(WID_CC_YEAR_UP);
        break;
 
      case WID_CC_YEAR_UP:
        GetCustomCurrency().to_euro = Clamp(GetCustomCurrency().to_euro + 1, MIN_EURO_YEAR, CalendarTime::MAX_YEAR);
        if (GetCustomCurrency().to_euro == CalendarTime::MAX_YEAR) this->DisableWidget(WID_CC_YEAR_UP);
        this->EnableWidget(WID_CC_YEAR_DOWN);
        break;
 
      case WID_CC_YEAR:
        SetDParam(0, GetCustomCurrency().to_euro);
        str = STR_JUST_INT;
        len = 7;
        line = WID_CC_YEAR;
        afilter = CS_NUMERAL;
        break;
    }
 
    if (len != 0) {
      this->query_widget = line;
      ShowQueryString(str, STR_CURRENCY_CHANGE_PARAMETER, len + 1, this, afilter, QSF_NONE);
    }
 
    this->SetTimeout();
    this->SetDirty();
  }
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value()) return;
 
    switch (this->query_widget) {
      case WID_CC_RATE:
        GetCustomCurrency().rate = Clamp(atoi(str->c_str()), 1, UINT16_MAX);
        break;
 
      case WID_CC_SEPARATOR: // Thousands separator
        GetCustomCurrency().separator = std::move(*str);
        break;
 
      case WID_CC_PREFIX:
        GetCustomCurrency().prefix = std::move(*str);
        break;
 
      case WID_CC_SUFFIX:
        GetCustomCurrency().suffix = std::move(*str);
        break;
 
      case WID_CC_YEAR: { // Year to switch to euro
        TimerGameCalendar::Year val = atoi(str->c_str());
 
        GetCustomCurrency().to_euro = (val < MIN_EURO_YEAR ? CF_NOEURO : std::min(val, CalendarTime::MAX_YEAR));
        break;
      }
    }
    MarkWholeScreenDirty();
    SetButtonState();
  }
 
  void OnTimeout() override
  {
    this->SetDirty();
  }
};
 
static constexpr NWidgetPart _nested_cust_currency_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_CURRENCY_WINDOW, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.sparse),
      NWidget(NWID_VERTICAL, NC_EQUALSIZE), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_RATE_DOWN), SetDataTip(AWV_DECREASE, STR_CURRENCY_DECREASE_EXCHANGE_RATE_TOOLTIP),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_RATE_UP), SetDataTip(AWV_INCREASE, STR_CURRENCY_INCREASE_EXCHANGE_RATE_TOOLTIP),
          EndContainer(),
          NWidget(WWT_TEXT, COLOUR_BLUE, WID_CC_RATE), SetDataTip(STR_CURRENCY_EXCHANGE_RATE, STR_CURRENCY_SET_EXCHANGE_RATE_TOOLTIP), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(WWT_PUSHBTN, COLOUR_DARK_BLUE, WID_CC_SEPARATOR_EDIT), SetDataTip(0x0, STR_CURRENCY_SET_CUSTOM_CURRENCY_SEPARATOR_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, COLOUR_BLUE, WID_CC_SEPARATOR), SetDataTip(STR_CURRENCY_SEPARATOR, STR_CURRENCY_SET_CUSTOM_CURRENCY_SEPARATOR_TOOLTIP), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(WWT_PUSHBTN, COLOUR_DARK_BLUE, WID_CC_PREFIX_EDIT), SetDataTip(0x0, STR_CURRENCY_SET_CUSTOM_CURRENCY_PREFIX_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, COLOUR_BLUE, WID_CC_PREFIX), SetDataTip(STR_CURRENCY_PREFIX, STR_CURRENCY_SET_CUSTOM_CURRENCY_PREFIX_TOOLTIP), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(WWT_PUSHBTN, COLOUR_DARK_BLUE, WID_CC_SUFFIX_EDIT), SetDataTip(0x0, STR_CURRENCY_SET_CUSTOM_CURRENCY_SUFFIX_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, COLOUR_BLUE, WID_CC_SUFFIX), SetDataTip(STR_CURRENCY_SUFFIX, STR_CURRENCY_SET_CUSTOM_CURRENCY_SUFFIX_TOOLTIP), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_YEAR_DOWN), SetDataTip(AWV_DECREASE, STR_CURRENCY_DECREASE_CUSTOM_CURRENCY_TO_EURO_TOOLTIP),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_YEAR_UP), SetDataTip(AWV_INCREASE, STR_CURRENCY_INCREASE_CUSTOM_CURRENCY_TO_EURO_TOOLTIP),
          EndContainer(),
          NWidget(WWT_TEXT, COLOUR_BLUE, WID_CC_YEAR), SetDataTip(STR_JUST_STRING1, STR_CURRENCY_SET_CUSTOM_CURRENCY_TO_EURO_TOOLTIP), SetFill(1, 0),
        EndContainer(),
      EndContainer(),
      NWidget(WWT_LABEL, COLOUR_BLUE, WID_CC_PREVIEW),
          SetDataTip(STR_CURRENCY_PREVIEW, STR_CURRENCY_CUSTOM_CURRENCY_PREVIEW_TOOLTIP),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _cust_currency_desc(
  WDP_CENTER, nullptr, 0, 0,
  WC_CUSTOM_CURRENCY, WC_NONE,
  0,
  _nested_cust_currency_widgets
);
 
static void ShowCustCurrency()
{
  CloseWindowById(WC_CUSTOM_CURRENCY, 0);
  new CustomCurrencyWindow(_cust_currency_desc);
}