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 "slider_func.h"
#include "highscore.h"
#include "base_media_base.h"
#include "base_media_graphics.h"
#include "base_media_music.h"
#include "base_media_sounds.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 "settingentry_gui.h"
#include "core/string_consumer.hpp"
 
#include "table/strings.h"
 
#include "dropdown_common_type.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 const uint32_t _autosave_dropdown_to_minutes[] = {…};
 
Dimension _setting_circle_size; 
 
static uint GetCurrentResolutionIndex()
{
  auto it = std::ranges::find(_resolutions, Dimension(_screen.width, _screen.height));
  return std::distance(_resolutions.begin(), it);
}
static uint GetCurrentResolutionIndex() {…}
 
static void ShowCustCurrency();
 
struct BaseSetTextfileWindow : public TextfileWindow {
  const std::string name; 
  const StringID content_type; 
 
  BaseSetTextfileWindow(Window *parent, TextfileType file_type, const std::string &name, const std::string &textfile, StringID content_type) : TextfileWindow(parent, file_type), name(name), content_type(content_type)
  {
    this->ConstructWindow();
    this->LoadTextfile(textfile, BASESET_DIR);
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    if (widget == WID_TF_CAPTION) {
      return GetString(stringid, this->content_type, this->name);
    }
 
    return this->Window::GetWidgetString(widget, stringid);
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
};
struct BaseSetTextfileWindow : public TextfileWindow {…};
 
template <class TBaseSet>
void ShowBaseSetTextfileWindow(Window *parent, TextfileType file_type, const TBaseSet *baseset, StringID content_type)
{
  parent->CloseChildWindowById(WC_TEXTFILE, file_type);
  new BaseSetTextfileWindow(parent, file_type, baseset->name, *baseset->GetTextfile(file_type), content_type);
}
void ShowBaseSetTextfileWindow(Window *parent, TextfileType file_type, const TBaseSet *baseset, StringID content_type) {…}
 
template <typename TBaseSet>
static std::string GetListLabel(const TBaseSet *baseset)
{
  if (baseset->GetNumInvalid() == 0) return GetString(STR_JUST_RAW_STRING, baseset->name);
  return GetString(STR_BASESET_STATUS, baseset->name, baseset->GetNumInvalid());
}
static std::string GetListLabel(const TBaseSet *baseset) {…}
 
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(GetListLabel(T::GetSet(i)), 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> monitor_rates = VideoDriver::GetInstance()->GetListOfMonitorRefreshRates();
  std::copy(monitor_rates.begin(), monitor_rates.end(), std::inserter(_refresh_rates, _refresh_rates.end()));
}
static void AddCustomRefreshRates() {…}
 
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 std::optional<std::string> ScaleMarkFunc(int, int, int value)
{
  /* Label only every 100% mark. */
  if (value % 100 != 0) return std::string{};
 
  return GetString(STR_GAME_OPTIONS_GUI_SCALE_MARK, value / 100, 0);
}
 
static std::optional<std::string> VolumeMarkFunc(int, int mark, int value)
{
  /* Label only every other mark. */
  if (mark % 2 != 0) return std::string{};
 
  /* 0-127 does not map nicely to 0-100. Dividing first gives us nice round numbers. */
  return GetString(STR_GAME_OPTIONS_VOLUME_MARK, value / 31 * 25);
}
 
static constexpr Colours GAME_OPTIONS_BACKGROUND = COLOUR_MAUVE;
static constexpr Colours GAME_OPTIONS_BUTTON = COLOUR_YELLOW;
static constexpr TextColour GAME_OPTIONS_FRAME = TC_ORANGE;
static constexpr TextColour GAME_OPTIONS_LABEL = TC_LIGHT_BLUE;
static constexpr TextColour GAME_OPTIONS_SELECTED = TC_WHITE;
 
static constexpr NWidgetPart _nested_social_plugins_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND, WID_GO_SOCIAL_PLUGIN_TITLE), SetTextStyle(GAME_OPTIONS_FRAME),
      NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
        NWidget(WWT_TEXT, INVALID_COLOUR), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_GAME_OPTIONS_SOCIAL_PLUGIN_PLATFORM), SetTextStyle(GAME_OPTIONS_LABEL),
        NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_SOCIAL_PLUGIN_PLATFORM), SetAlignment(SA_RIGHT),
      EndContainer(),
      NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
        NWidget(WWT_TEXT, INVALID_COLOUR), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE), SetTextStyle(GAME_OPTIONS_LABEL),
        NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_SOCIAL_PLUGIN_STATE), SetAlignment(SA_RIGHT),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static constexpr NWidgetPart _nested_social_plugins_none_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_TEXT, INVALID_COLOUR), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_GAME_OPTIONS_SOCIAL_PLUGINS_NONE), SetTextStyle(GAME_OPTIONS_LABEL),
  EndContainer(),
};
 
class NWidgetSocialPlugins : public NWidgetVertical {
public:
  NWidgetSocialPlugins() : NWidgetVertical({}, WID_GO_SOCIAL_PLUGINS)
  {
    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 SetupSmallestSize(Window *w) override
  {
    this->current_index = -1;
    NWidgetVertical::SetupSmallestSize(w);
  }
  void SetupSmallestSize(Window *w) override {…}
 
  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;
  }
  std::string &GetWidestPlugin(T SocialIntegrationPlugin::*member) const {…}
 
  std::string GetWidgetString(WidgetID widget, StringID) const
  {
    switch (widget) {
      case WID_GO_SOCIAL_PLUGIN_TITLE:
        /* For SetupSmallestSize, use the longest string we have. */
        if (this->current_index < 0) {
          return GetString(STR_GAME_OPTIONS_SOCIAL_PLUGIN_TITLE, GetWidestPlugin(&SocialIntegrationPlugin::name), GetWidestPlugin(&SocialIntegrationPlugin::version));
        }
 
        if (this->plugins[this->current_index]->name.empty()) {
          return this->plugins[this->current_index]->basepath;
        }
 
        return GetString(STR_GAME_OPTIONS_SOCIAL_PLUGIN_TITLE, this->plugins[this->current_index]->name, this->plugins[this->current_index]->version);
 
      case WID_GO_SOCIAL_PLUGIN_PLATFORM:
        /* For SetupSmallestSize, use the longest string we have. */
        if (this->current_index < 0) {
          return GetWidestPlugin(&SocialIntegrationPlugin::social_platform);
        }
 
        return this->plugins[this->current_index]->social_platform;
 
      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. */
          StringID longest = STR_NULL;
          int longest_length = 0;
          for (const auto &[state, string] : state_to_string) {
            int length = GetStringBoundingBox(GetString(string, longest_plugin)).width;
            if (length > longest_length) {
              longest_length = length;
              longest = string;
            }
          }
 
          return GetString(longest, longest_plugin);
        }
 
        const auto plugin = this->plugins[this->current_index];
 
        /* Find the string for the state. */
        for (const auto &[state, string] : state_to_string) {
          if (plugin->state == state) {
            return GetString(string, plugin->social_platform);
          }
        }
 
        /* Default string, in case no state matches. */
        return GetString(STR_GAME_OPTIONS_SOCIAL_PLUGIN_STATE_FAILED, plugin->social_platform);
      }
 
      default: NOT_REACHED();
    }
  }
 
  void Draw(const Window *w) override
  {
    this->current_index = 0;
 
    for (auto &wid : this->children) {
      wid->Draw(w);
      this->current_index++;
    }
  }
  void Draw(const Window *w) override {…}
 
private:
  int current_index = -1;
  std::vector<SocialIntegrationPlugin *> plugins{};
};
class NWidgetSocialPlugins : public NWidgetVertical {…};
 
std::unique_ptr<NWidgetBase> MakeNWidgetSocialPlugins()
{
  return std::make_unique<NWidgetSocialPlugins>();
}
std::unique_ptr<NWidgetBase> MakeNWidgetSocialPlugins() {…}
 
int SETTING_HEIGHT = 11;    
 
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, 
};
enum WarnHiddenResult {…};
 
static void ResetAllSettingsConfirmationCallback(Window *w, bool confirmed)
{
  if (confirmed) {
    GetSettingsTree().ResetAll();
    GetSettingsTree().FoldAll();
    w->InvalidateData();
  }
}
static void ResetAllSettingsConfirmationCallback(Window *w, bool confirmed) {…}
 
struct GameOptionsWindow : Window {
  static inline GameSettings *settings_ptr; 
 
  SettingEntry *valuewindow_entry = nullptr; 
  SettingEntry *clicked_entry = nullptr; 
  SettingEntry *last_clicked = nullptr; 
  SettingEntry *valuedropdown_entry = nullptr; 
  bool closing_dropdown = false; 
 
  SettingFilter filter{}; 
  QueryString filter_editbox; 
  bool manually_changed_folding = false; 
  WarnHiddenResult warn_missing = WHR_NONE; 
  int warn_lines = 0; 
 
  Scrollbar *vscroll;
  Scrollbar *vscroll_description;
  static constexpr uint NUM_DESCRIPTION_LINES = 5;
 
  GameSettings *opt = nullptr;
  bool reload = false;
  int gui_scale = 0;
  static inline WidgetID active_tab = WID_GO_TAB_GENERAL;
 
  GameOptionsWindow(WindowDesc &desc) : Window(desc), filter_editbox(50), gui_scale(_gui_scale)
  {
    this->opt = &GetGameSettings();
 
    AddCustomRefreshRates();
 
    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->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_GO_SCROLLBAR);
    this->vscroll_description = this->GetScrollbar(WID_GO_HELP_TEXT_SCROLL);
    this->vscroll_description->SetCapacity(NUM_DESCRIPTION_LINES);
    this->FinishInitNested(WN_GAME_OPTIONS_GAME_OPTIONS);
 
    this->querystrings[WID_GO_FILTER] = &this->filter_editbox;
    this->filter_editbox.cancel_button = QueryString::ACTION_CLEAR;
 
    this->OnInvalidateData(0);
 
    this->SetTab(GameOptionsWindow::active_tab);
 
    if constexpr (!NetworkSurveyHandler::IsSurveyPossible()) this->GetWidget<NWidgetStacked>(WID_GO_SURVEY_SEL)->SetDisplayedPlane(SZSP_NONE);
  }
 
  void OnInit() override
  {
    _setting_circle_size = maxdim(GetSpriteSize(SPR_CIRCLE_FOLDED), GetSpriteSize(SPR_CIRCLE_UNFOLDED));
  }
  void OnInit() override {…}
 
  void Close([[maybe_unused]] int data = 0) override
  {
    CloseWindowById(WC_CUSTOM_CURRENCY, 0);
    if (this->reload) _switch_mode = SM_MENU;
    this->Window::Close();
  }
  void Close([[maybe_unused]] int data = 0) override {…}
 
  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 {
            list.push_back(MakeDropDownListStringItem(GetString(STR_GAME_OPTIONS_CURRENCY_CODE, currency.name, 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;
          std::string name;
          if (&_languages[i] == _current_language) {
            *selected_index = i;
            name = _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. */
            name = _languages[i].name;
          }
          if (hide_percentage) {
            list.push_back(MakeDropDownListStringItem(std::move(name), i));
          } else {
            int percentage = (LANGUAGE_TOTAL_STRINGS - _languages[i].missing) * 100 / LANGUAGE_TOTAL_STRINGS;
            list.push_back(MakeDropDownListStringItem(GetString(STR_GAME_OPTIONS_LANGUAGE_PERCENTAGE, std::move(name), 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++) {
          list.push_back(MakeDropDownListStringItem(GetString(STR_GAME_OPTIONS_RESOLUTION_ITEM, _resolutions[i].width, _resolutions[i].height), 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;
          list.push_back(MakeDropDownListStringItem(GetString(STR_GAME_OPTIONS_REFRESH_RATE_ITEM, *it), 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;
 
      case WID_GO_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_GO_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;
  }
  DropDownList BuildDropDownList(WidgetID widget, int *selected_index) const {…}
 
  std::string GetToggleString(StringID stringid, WidgetID state_widget) const
  {
    return GetString(STR_GAME_OPTIONS_SETTING, stringid, this->IsWidgetLowered(state_widget) ? STR_CONFIG_SETTING_ON : STR_CONFIG_SETTING_OFF);
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    switch (widget) {
      case WID_GO_CURRENCY_DROPDOWN: {
        const CurrencySpec &currency = _currency_specs[this->opt->locale.currency];
        if (currency.code.empty()) return GetString(currency.name);
        return GetString(STR_GAME_OPTIONS_CURRENCY_CODE, currency.name, currency.code);
      }
 
      case WID_GO_AUTOSAVE_DROPDOWN: {
        int index = 0;
        for (auto &minutes : _autosave_dropdown_to_minutes) {
          index++;
          if (_settings_client.gui.autosave_interval <= minutes) break;
        }
        return GetString(_autosave_dropdown[index - 1]);
      }
 
      case WID_GO_LANG_DROPDOWN:         return _current_language->own_name;
      case WID_GO_BASE_GRF_DROPDOWN:     return GetListLabel(BaseGraphics::GetUsedSet());
      case WID_GO_BASE_SFX_DROPDOWN:     return GetListLabel(BaseSounds::GetUsedSet());
      case WID_GO_BASE_MUSIC_DROPDOWN:   return GetListLabel(BaseMusic::GetUsedSet());
      case WID_GO_REFRESH_RATE_DROPDOWN: return GetString(STR_GAME_OPTIONS_REFRESH_RATE_ITEM, _settings_client.gui.refresh_rate);
      case WID_GO_RESOLUTION_DROPDOWN: {
        auto current_resolution = GetCurrentResolutionIndex();
 
        if (current_resolution == _resolutions.size()) {
          return GetString(STR_GAME_OPTIONS_RESOLUTION_OTHER);
        }
        return GetString(STR_GAME_OPTIONS_RESOLUTION_ITEM, _resolutions[current_resolution].width, _resolutions[current_resolution].height);
      }
 
      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);
 
        return plugin->GetWidgetString(widget, stringid);
      }
 
      case WID_GO_RESTRICT_DROPDOWN:
        return GetString(_game_settings_restrict_dropdown[this->filter.mode]);
 
      case WID_GO_TYPE_DROPDOWN:
        switch (this->filter.type) {
          case ST_GAME:    return GetString(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_INGAME);
          case ST_COMPANY: return GetString(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_INGAME);
          case ST_CLIENT:  return GetString(STR_CONFIG_SETTING_TYPE_DROPDOWN_CLIENT);
          default:         return GetString(STR_CONFIG_SETTING_TYPE_DROPDOWN_ALL);
        }
        break;
 
      case WID_GO_SURVEY_PARTICIPATE_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_PARTICIPATE_SURVEY, WID_GO_SURVEY_PARTICIPATE_BUTTON);
 
      case WID_GO_GUI_SCALE_AUTO_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_GUI_SCALE_AUTO, WID_GO_GUI_SCALE_AUTO);
 
      case WID_GO_GUI_SCALE_BEVEL_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_GUI_SCALE_BEVELS, WID_GO_GUI_SCALE_BEVEL_BUTTON);
 
      case WID_GO_GUI_FONT_SPRITE_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_GUI_FONT_SPRITE, WID_GO_GUI_FONT_SPRITE);
 
      case WID_GO_GUI_FONT_AA_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_GUI_FONT_AA, WID_GO_GUI_FONT_AA);
 
      case WID_GO_FULLSCREEN_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_FULLSCREEN, WID_GO_FULLSCREEN_BUTTON);
 
      case WID_GO_VIDEO_ACCEL_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_VIDEO_ACCELERATION, WID_GO_VIDEO_ACCEL_BUTTON);
 
      case WID_GO_VIDEO_VSYNC_TEXT:
        return GetToggleString(STR_GAME_OPTIONS_VIDEO_VSYNC, WID_GO_VIDEO_VSYNC_BUTTON);
 
      default:
        return this->Window::GetWidgetString(widget, stringid);
    }
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    switch (widget) {
      case WID_GO_BASE_GRF_DESCRIPTION:
        DrawStringMultiLine(r, GetString(STR_JUST_RAW_STRING, BaseGraphics::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode())), GAME_OPTIONS_SELECTED);
        break;
 
      case WID_GO_BASE_SFX_DESCRIPTION:
        DrawStringMultiLine(r, GetString(STR_JUST_RAW_STRING, BaseSounds::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode())), GAME_OPTIONS_SELECTED);
        break;
 
      case WID_GO_BASE_MUSIC_DESCRIPTION:
        DrawStringMultiLine(r, GetString(STR_JUST_RAW_STRING, BaseMusic::GetUsedSet()->GetDescription(GetCurrentLanguageIsoCode())), GAME_OPTIONS_SELECTED);
        break;
 
      case WID_GO_GUI_SCALE:
        DrawSliderWidget(r, GAME_OPTIONS_BACKGROUND, GAME_OPTIONS_BUTTON, TC_BLACK, MIN_INTERFACE_SCALE, MAX_INTERFACE_SCALE, SCALE_NMARKS, this->gui_scale, ScaleMarkFunc);
        break;
 
      case WID_GO_VIDEO_DRIVER_INFO:
        DrawStringMultiLine(r, GetString(STR_GAME_OPTIONS_VIDEO_DRIVER_INFO, std::string{VideoDriver::GetInstance()->GetInfoString()}), GAME_OPTIONS_SELECTED);
        break;
 
      case WID_GO_BASE_SFX_VOLUME:
        DrawSliderWidget(r, GAME_OPTIONS_BACKGROUND, GAME_OPTIONS_BUTTON, TC_BLACK, 0, INT8_MAX, VOLUME_NMARKS, _settings_client.music.effect_vol, VolumeMarkFunc);
        break;
 
      case WID_GO_BASE_MUSIC_VOLUME:
        DrawSliderWidget(r, GAME_OPTIONS_BACKGROUND, GAME_OPTIONS_BUTTON, TC_BLACK, 0, INT8_MAX, VOLUME_NMARKS, _settings_client.music.music_vol, VolumeMarkFunc);
        break;
 
      case WID_GO_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_GO_SETTING_PROPERTIES:
        if (this->last_clicked != nullptr) {
          const IntSettingDesc *sd = this->last_clicked->setting;
 
          Rect tr = r;
          std::string str;
          switch (sd->GetType()) {
            case ST_COMPANY: str = GetString(STR_CONFIG_SETTING_TYPE, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_COMPANY_INGAME); break;
            case ST_CLIENT:  str = GetString(STR_CONFIG_SETTING_TYPE, STR_CONFIG_SETTING_TYPE_CLIENT); break;
            case ST_GAME:    str = GetString(STR_CONFIG_SETTING_TYPE, _game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_GAME_MENU : STR_CONFIG_SETTING_TYPE_GAME_INGAME); break;
            default: NOT_REACHED();
          }
          DrawString(tr, str);
          tr.top += GetCharacterHeight(FS_NORMAL);
 
          auto [param1, param2] = sd->GetValueParams(sd->GetDefaultValue());
          DrawString(tr, GetString(STR_CONFIG_SETTING_DEFAULT_VALUE, param1, param2));
        }
        break;
 
      case WID_GO_HELP_TEXT:
        if (this->last_clicked != nullptr) {
          const IntSettingDesc *sd = this->last_clicked->setting;
 
          DrawPixelInfo tmp_dpi;
          if (FillDrawPixelInfo(&tmp_dpi, r)) {
            AutoRestoreBackup dpi_backup(_cur_dpi, &tmp_dpi);
            int scrolls_pos = this->vscroll_description->GetPosition() * GetCharacterHeight(FS_NORMAL);
            DrawStringMultiLine(0, r.Width() - 1, -scrolls_pos, r.Height() - 1, sd->GetHelp(), TC_WHITE);
          }
        }
        break;
 
      default:
        break;
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void SetDisplayedHelpText(SettingEntry *pe)
  {
    if (this->last_clicked != pe) this->SetDirty();
    this->last_clicked = pe;
    UpdateHelpTextSize();
  }
  void SetDisplayedHelpText(SettingEntry *pe) {…}
 
  void UpdateHelpTextSize()
  {
    NWidgetResizeBase *wid = this->GetWidget<NWidgetResizeBase>(WID_GO_HELP_TEXT);
    this->vscroll_description->SetCount(this->last_clicked ? CeilDiv(this->last_clicked->GetMaxHelpHeight(wid->current_x), GetCharacterHeight(FS_NORMAL)) : 0);
  }
 
  void SetTab(WidgetID widget)
  {
    this->SetWidgetsLoweredState(false, WID_GO_TAB_GENERAL, WID_GO_TAB_GRAPHICS, WID_GO_TAB_SOUND, WID_GO_TAB_ADVANCED, WID_GO_TAB_SOCIAL);
    this->LowerWidget(widget);
    GameOptionsWindow::active_tab = widget;
 
    int plane;
    switch (widget) {
      case WID_GO_TAB_GENERAL: plane = 0; break;
      case WID_GO_TAB_GRAPHICS: plane = 1; break;
      case WID_GO_TAB_SOUND: plane = 2; break;
      case WID_GO_TAB_SOCIAL: plane = 3; break;
      case WID_GO_TAB_ADVANCED: plane = 4; break;
      default: NOT_REACHED();
    }
 
    this->GetWidget<NWidgetStacked>(WID_GO_TAB_SELECTION)->SetDisplayedPlane(plane);
    if (widget == WID_GO_TAB_ADVANCED) this->SetFocusedWidget(WID_GO_FILTER);
    this->SetDirty();
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_GO_OPTIONSPANEL, WidgetDimensions::scaled.framerect.Vertical());
    UpdateHelpTextSize();
 
    bool changed = false;
 
    NWidgetResizeBase *wid = this->GetWidget<NWidgetResizeBase>(WID_GO_BASE_GRF_DESCRIPTION);
    int y = 0;
    for (int i = 0; i < BaseGraphics::GetNumSets(); i++) {
      std::string str = GetString(STR_JUST_RAW_STRING, BaseGraphics::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(str, 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++) {
      std::string str = GetString(STR_JUST_RAW_STRING, BaseSounds::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(str, 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++) {
      std::string str = GetString(STR_JUST_RAW_STRING, BaseMusic::GetSet(i)->GetDescription(GetCurrentLanguageIsoCode()));
      y = std::max(y, GetStringHeight(str, wid->current_x));
    }
    changed |= wid->UpdateVerticalSize(y);
 
    wid = this->GetWidget<NWidgetResizeBase>(WID_GO_VIDEO_DRIVER_INFO);
    std::string str = GetString(STR_GAME_OPTIONS_VIDEO_DRIVER_INFO, std::string{VideoDriver::GetInstance()->GetInfoString()});
    y = GetStringHeight(str, wid->current_x);
    changed |= wid->UpdateVerticalSize(y);
 
    if (changed) this->ReInit(0, 0, this->flags.Test(WindowFlag::Centred));
  }
  void OnResize() override {…}
 
  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;
      }
 
      case WID_GO_OPTIONSPANEL:
        resize.height = SETTING_HEIGHT = std::max({(int)_setting_circle_size.height, SETTING_BUTTON_HEIGHT, GetCharacterHeight(FS_NORMAL)}) + WidgetDimensions::scaled.vsep_normal;
        resize.width = 1;
 
        size.height = 8 * resize.height + WidgetDimensions::scaled.framerect.Vertical();
        break;
 
      case WID_GO_SETTING_PROPERTIES: {
        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) {
          size.width = std::max(size.width, GetStringBoundingBox(GetString(STR_CONFIG_SETTING_TYPE, setting_type)).width + padding.width);
        }
        size.height = 2 * GetCharacterHeight(FS_NORMAL);
        break;
      }
 
      case WID_GO_HELP_TEXT:
        size.height = NUM_DESCRIPTION_LINES * GetCharacterHeight(FS_NORMAL);
        break;
 
      case WID_GO_RESTRICT_CATEGORY:
      case WID_GO_RESTRICT_TYPE:
        size.width = std::max(GetStringBoundingBox(STR_CONFIG_SETTING_RESTRICT_CATEGORY).width, GetStringBoundingBox(STR_CONFIG_SETTING_RESTRICT_TYPE).width);
        break;
 
      default:
        break;
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void OnPaint() override
  {
    if (this->GetWidget<NWidgetStacked>(WID_GO_TAB_SELECTION)->shown_plane != 4) {
      this->DrawWidgets();
      return;
    }
 
    if (this->closing_dropdown) {
      this->closing_dropdown = false;
      assert(this->valuedropdown_entry != nullptr);
      this->valuedropdown_entry->SetButtons({});
      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_GO_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 {
      new_warn_lines = GetStringLineCount(GetString(warn_str, _game_settings_restrict_dropdown[this->filter.min_cat]), 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) {
      DrawStringMultiLineWithClipping(panel.WithHeight(this->warn_lines * GetCharacterHeight(FS_NORMAL)),
        GetString(warn_str, _game_settings_restrict_dropdown[this->filter.min_cat]),
        TC_BLACK, SA_CENTER);
    }
  }
  void OnPaint() override {…}
 
  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(this, (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(this, (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(this, (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_ADVANCED:
      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(this);
        break;
 
      case WID_GO_FULLSCREEN_BUTTON: // Click fullscreen on/off
        /* try to toggle full-screen on/off */
        if (!ToggleFullScreen(!_fullscreen)) {
          ShowErrorMessage(GetEncodedString(STR_ERROR_FULLSCREEN_FAILED), {}, WL_ERROR);
        }
        this->SetWidgetLoweredState(WID_GO_FULLSCREEN_BUTTON, _fullscreen);
        this->SetWidgetDirty(WID_GO_FULLSCREEN_BUTTON);
        this->SetWidgetDirty(WID_GO_FULLSCREEN_TEXT);
        break;
 
      case WID_GO_VIDEO_ACCEL_BUTTON:
        _video_hw_accel = !_video_hw_accel;
        ShowErrorMessage(GetEncodedString(STR_GAME_OPTIONS_VIDEO_ACCELERATION_RESTART), {}, WL_INFO);
        this->SetWidgetLoweredState(WID_GO_VIDEO_ACCEL_BUTTON, _video_hw_accel);
        this->SetWidgetDirty(WID_GO_VIDEO_ACCEL_BUTTON);
        this->SetWidgetDirty(WID_GO_VIDEO_ACCEL_TEXT);
#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);
        this->SetWidgetDirty(WID_GO_VIDEO_VSYNC_TEXT);
#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->SetWidgetDirty(WID_GO_VIDEO_VSYNC_TEXT);
        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);
        this->SetWidgetDirty(WID_GO_GUI_SCALE_AUTO_TEXT);
        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.param.empty()) 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(GetEncodedString(STR_ERROR_RESOLUTION_LIST_FAILED), {}, WL_ERROR);
        }
        break;
      }
 
      case WID_GO_EXPAND_ALL:
        this->manually_changed_folding = true;
        GetSettingsTree().UnFoldAll();
        this->InvalidateData();
        break;
 
      case WID_GO_COLLAPSE_ALL:
        this->manually_changed_folding = true;
        GetSettingsTree().FoldAll();
        this->InvalidateData();
        break;
 
      case WID_GO_RESET_ALL:
        ShowQuery(
          GetEncodedString(STR_CONFIG_SETTING_RESET_ALL_CONFIRMATION_DIALOG_CAPTION),
          GetEncodedString(STR_CONFIG_SETTING_RESET_ALL_CONFIRMATION_DIALOG_TEXT),
          this,
          ResetAllSettingsConfirmationCallback
        );
        break;
 
      case WID_GO_RESTRICT_DROPDOWN: {
        int selected;
        DropDownList list = this->BuildDropDownList(widget, &selected);
        if (!list.empty()) {
          ShowDropDownList(this, std::move(list), this->filter.mode, widget);
        }
        break;
      }
 
      case WID_GO_TYPE_DROPDOWN: {
        int selected;
        DropDownList list = this->BuildDropDownList(widget, &selected);
        if (!list.empty()) {
          ShowDropDownList(this, std::move(list), this->filter.type, widget);
        }
        break;
      }
 
      case WID_GO_OPTIONSPANEL:
        OptionsPanelClick(pt);
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OptionsPanelClick(Point pt)
  {
    int32_t btn = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_GO_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
 
    const NWidgetBase *wid = this->GetWidget<NWidgetBase>(WID_GO_OPTIONSPANEL);
    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 - wid->pos_x; // 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;
    }
 
    auto [min_val, max_val] = sd->GetRange();
    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.Test(SettingFlag::GuiDropdown)) {
      this->SetDisplayedHelpText(pe);
 
      if (this->valuedropdown_entry == pe) {
        /* unclick the dropdown */
        this->CloseChildWindows(WC_DROPDOWN_MENU);
        this->closing_dropdown = false;
        this->valuedropdown_entry->SetButtons({});
        this->valuedropdown_entry = nullptr;
      } else {
        if (this->valuedropdown_entry != nullptr) this->valuedropdown_entry->SetButtons({});
        this->closing_dropdown = false;
 
        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(SettingEntryFlag::LeftDepressed);
 
          DropDownList list;
          for (int32_t i = min_val; i <= static_cast<int32_t>(max_val); i++) {
            auto [param1, param2] = sd->GetValueParams(i);
            list.push_back(MakeDropDownListStringItem(GetString(STR_JUST_STRING1, param1, param2), i));
          }
 
          ShowDropDownListAt(this, std::move(list), value, WID_GO_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) ? ((max_val - min_val) / 50) : sd->interval;
        if (step == 0) step = 1;
 
        /* don't allow too fast scrolling */
        if (this->flags.Test(WindowFlag::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 (min_val < 0) {
            assert(static_cast<int32_t>(max_val) >= 0);
            if (value > static_cast<int32_t>(max_val)) value = static_cast<int32_t>(max_val);
          } else {
            if (static_cast<uint32_t>(value) > max_val) value = static_cast<int32_t>(max_val);
          }
          if (value < min_val) value = min_val; // skip between "disabled" and minimum
        } else {
          value -= step;
          if (value < min_val) value = sd->flags.Test(SettingFlag::GuiZeroIsSpecial) ? 0 : min_val;
        }
 
        /* Set up scroller timeout for numeric values */
        if (value != oldvalue) {
          if (this->clicked_entry != nullptr) { // Release previous buttons if any
            this->clicked_entry->SetButtons({});
          }
          this->clicked_entry = pe;
          this->clicked_entry->SetButtons((x >= SETTING_BUTTON_WIDTH / 2) != (_current_text_dir == TD_RTL) ? SettingEntryFlag::RightDepressed : SettingEntryFlag::LeftDepressed);
          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.Test(SettingFlag::GuiDropdown)) {
        int64_t value64 = value;
        /* Show the correct currency-translated value */
        if (sd->flags.Test(SettingFlag::GuiCurrency)) value64 *= GetCurrency().rate;
 
        CharSetFilter charset_filter = CS_NUMERAL; //default, only numeric input allowed
        if (min_val < 0) charset_filter = CS_NUMERAL_SIGNED; // special case, also allow '-' sign for negative input
 
        this->valuewindow_entry = pe;
        /* Limit string length to 14 so that MAX_INT32 * max currency rate doesn't exceed MAX_INT64. */
        ShowQueryString(GetString(STR_JUST_INT, value64), STR_CONFIG_SETTING_QUERY_CAPTION, 15, this, charset_filter, QueryStringFlag::EnableDefault);
      }
      this->SetDisplayedHelpText(pe);
    }
  }
 
  void OnTimeout() override
  {
    if (this->clicked_entry != nullptr) { // On timeout, release any depressed buttons
      this->clicked_entry->SetButtons({});
      this->clicked_entry = nullptr;
      this->SetDirty();
    }
  }
  void OnTimeout() override {…}
 
  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()) {
      auto llvalue = ParseInteger<int64_t>(*str, 10, true);
      if (!llvalue.has_value()) return;
 
      /* Save the correct currency-translated value */
      if (sd->flags.Test(SettingFlag::GuiCurrency)) llvalue = *llvalue / GetCurrency().rate;
 
      value = ClampTo<int32_t>(*llvalue);
    } else {
      value = sd->GetDefaultValue();
    }
 
    SetSettingValue(this->valuewindow_entry->setting, value);
    this->SetDirty();
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
 
  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 OnMouseLoop() override {…}
 
  void OnDropdownSelect(WidgetID widget, int index, int) 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(GetEncodedString(STR_GAME_OPTIONS_REFRESH_RATE_WARNING), {}, 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;
 
      case WID_GO_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_GO_TYPE_DROPDOWN:
        this->filter.type = (SettingType)index;
        this->InvalidateData();
        break;
 
      case WID_GO_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.Test(SettingFlag::GuiDropdown));
 
        SetSettingValue(sd, index);
        this->SetDirty();
        break;
    }
  }
  void OnDropdownSelect(WidgetID widget, int index, int) override {…}
 
  void OnDropdownClose(Point pt, WidgetID widget, int index, int click_result, bool instant_close) override
  {
    if (widget != WID_GO_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, click_result, 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 OnDropdownClose(Point pt, WidgetID widget, int index, int click_result, bool instant_close) override {…}
 
  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);
 
    /* 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_GO_EXPAND_ALL, all_unfolded);
    this->SetWidgetDisabledState(WID_GO_COLLAPSE_ALL, all_folded);
  }
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override {…}
 
  void OnEditboxChanged(WidgetID wid) override
  {
    if (wid == WID_GO_FILTER) {
      this->filter.string.SetFilterTerm(this->filter_editbox.text.GetText());
      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 OnEditboxChanged(WidgetID wid) override {…}
};
struct GameOptionsWindow : Window {…};
 
static constexpr NWidgetPart _nested_game_options_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, GAME_OPTIONS_BACKGROUND),
    NWidget(WWT_CAPTION, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, GAME_OPTIONS_BACKGROUND),
  EndContainer(),
  NWidget(WWT_PANEL, GAME_OPTIONS_BACKGROUND),
    NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPadding(WidgetDimensions::unscaled.sparse),
      NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_TAB_GENERAL),  SetMinimalTextLines(2, 0), SetStringTip(STR_GAME_OPTIONS_TAB_GENERAL, STR_GAME_OPTIONS_TAB_GENERAL_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_TAB_GRAPHICS), SetMinimalTextLines(2, 0), SetStringTip(STR_GAME_OPTIONS_TAB_GRAPHICS, STR_GAME_OPTIONS_TAB_GRAPHICS_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_TAB_SOUND),    SetMinimalTextLines(2, 0), SetStringTip(STR_GAME_OPTIONS_TAB_SOUND, STR_GAME_OPTIONS_TAB_SOUND_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_TAB_SOCIAL),   SetMinimalTextLines(2, 0), SetStringTip(STR_GAME_OPTIONS_TAB_SOCIAL, STR_GAME_OPTIONS_TAB_SOCIAL_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_TAB_ADVANCED), SetMinimalTextLines(2, 0), SetStringTip(STR_GAME_OPTIONS_TAB_ADVANCED, STR_GAME_OPTIONS_TAB_ADVANCED_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, GAME_OPTIONS_BACKGROUND),
    NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GO_TAB_SELECTION),
      /* General tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse_resize),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_LANGUAGE), SetTextStyle(GAME_OPTIONS_FRAME),
            NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_LANG_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_LANGUAGE_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_AUTOSAVE_FRAME), SetTextStyle(GAME_OPTIONS_FRAME),
            NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_AUTOSAVE_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_AUTOSAVE_DROPDOWN_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_CURRENCY_UNITS_FRAME), SetTextStyle(GAME_OPTIONS_FRAME),
            NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_CURRENCY_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_CURRENCY_UNITS_DROPDOWN_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
 
          NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GO_SURVEY_SEL),
            NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_FRAME), SetTextStyle(GAME_OPTIONS_FRAME), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_SURVEY_PARTICIPATE_BUTTON), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_SURVEY_PARTICIPATE_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_SURVEY_PREVIEW_BUTTON), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_PREVIEW, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_PREVIEW_TOOLTIP),
                NWidget(WWT_TEXTBTN, GAME_OPTIONS_BUTTON, WID_GO_SURVEY_LINK_BUTTON), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_GAME_OPTIONS_PARTICIPATE_SURVEY_LINK, STR_GAME_OPTIONS_PARTICIPATE_SURVEY_LINK_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
        EndContainer(),
        NWidget(NWID_SPACER), SetFill(1, 1), SetResize(1, 1), // Allows this pane to resize
      EndContainer(),
 
      /* Graphics tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse_resize),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_INTERFACE), SetTextStyle(GAME_OPTIONS_FRAME),
            NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_TEXT, INVALID_COLOUR), SetStringTip(STR_GAME_OPTIONS_GUI_SCALE_FRAME), SetTextStyle(GAME_OPTIONS_LABEL),
                NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_GUI_SCALE), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_GAME_OPTIONS_GUI_SCALE_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_GUI_SCALE_AUTO), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_GUI_SCALE_AUTO_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_GUI_SCALE_AUTO_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_GUI_SCALE_BEVEL_BUTTON), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_GUI_SCALE_BEVELS_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_GUI_SCALE_BEVEL_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
#ifdef HAS_TRUETYPE_FONT
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_GUI_FONT_SPRITE), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_GUI_FONT_SPRITE_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_GUI_FONT_SPRITE_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_GUI_FONT_AA), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_GUI_FONT_AA_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_GUI_FONT_AA_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
#endif /* HAS_TRUETYPE_FONT */
            EndContainer(),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_DISPLAY), SetTextStyle(GAME_OPTIONS_FRAME),
            NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
                NWidget(WWT_TEXT, INVALID_COLOUR), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_GAME_OPTIONS_RESOLUTION), SetTextStyle(GAME_OPTIONS_LABEL),
                NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_RESOLUTION_DROPDOWN), SetFill(1, 0), SetToolTip(STR_GAME_OPTIONS_RESOLUTION_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.hsep_normal, 0),
                NWidget(WWT_TEXT, INVALID_COLOUR), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_GAME_OPTIONS_REFRESH_RATE), SetTextStyle(GAME_OPTIONS_LABEL),
                NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_REFRESH_RATE_DROPDOWN), SetFill(1, 0), SetToolTip(STR_GAME_OPTIONS_REFRESH_RATE_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_FULLSCREEN_BUTTON), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_FULLSCREEN_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_FULLSCREEN_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_VIDEO_ACCEL_BUTTON), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_VIDEO_ACCELERATION_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR,WID_GO_VIDEO_ACCEL_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
#ifndef __APPLE__
              NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
                NWidget(WWT_BOOLBTN, GAME_OPTIONS_BACKGROUND, WID_GO_VIDEO_VSYNC_BUTTON), SetAlternateColourTip(GAME_OPTIONS_BUTTON, STR_GAME_OPTIONS_VIDEO_VSYNC_TOOLTIP),
                NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_VIDEO_VSYNC_TEXT), SetFill(1, 0), SetResize(1, 0), SetTextStyle(GAME_OPTIONS_LABEL),
              EndContainer(),
#endif
              NWidget(NWID_HORIZONTAL),
                NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_VIDEO_DRIVER_INFO), SetMinimalTextLines(1, 0), SetFill(1, 0), SetResize(1, 0),
              EndContainer(),
            EndContainer(),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_BASE_GRF), SetTextStyle(GAME_OPTIONS_FRAME), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0), SetFill(1, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
              NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_BASE_GRF_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
              NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_PARAMETERS), SetStringTip(STR_NEWGRF_SETTINGS_SET_PARAMETERS),
              NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_CONTENT_DOWNLOAD), SetStringTip(STR_GAME_OPTIONS_ONLINE_CONTENT, STR_GAME_OPTIONS_ONLINE_CONTENT_TOOLTIP),
            EndContainer(),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_BASE_GRF_DESCRIPTION), SetStringTip(STR_EMPTY, STR_GAME_OPTIONS_BASE_GRF_DESCRIPTION_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
            NWidget(NWID_VERTICAL),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_GRF_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
        EndContainer(),
        NWidget(NWID_SPACER), SetFill(1, 1), SetResize(1, 1), // Allows this pane to resize
      EndContainer(),
 
      /* Sound/Music tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse_resize),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_VOLUME), SetTextStyle(GAME_OPTIONS_FRAME), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
              NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_TEXT_SFX_VOLUME), SetStringTip(STR_GAME_OPTIONS_SFX_VOLUME), SetTextStyle(GAME_OPTIONS_LABEL),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_BASE_SFX_VOLUME), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_MUSIC_TOOLTIP_DRAG_SLIDERS_TO_SET_MUSIC),
            EndContainer(),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
              NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_TEXT_MUSIC_VOLUME), SetStringTip(STR_GAME_OPTIONS_MUSIC_VOLUME), SetTextStyle(GAME_OPTIONS_LABEL),
              NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_BASE_MUSIC_VOLUME), SetMinimalTextLines(1, 12 + WidgetDimensions::unscaled.vsep_normal, FS_SMALL), SetFill(1, 0), SetResize(1, 0), SetToolTip(STR_MUSIC_TOOLTIP_DRAG_SLIDERS_TO_SET_MUSIC),
            EndContainer(),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_BASE_SFX), SetTextStyle(GAME_OPTIONS_FRAME), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
              NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_BASE_SFX_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
              NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_CONTENT_DOWNLOAD), SetStringTip(STR_GAME_OPTIONS_ONLINE_CONTENT, STR_GAME_OPTIONS_ONLINE_CONTENT_TOOLTIP),
            EndContainer(),
            NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_BASE_SFX_DESCRIPTION), SetMinimalTextLines(1, 0), SetToolTip(STR_GAME_OPTIONS_BASE_SFX_DESCRIPTION_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
            NWidget(NWID_VERTICAL),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_SFX_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
 
          NWidget(WWT_FRAME, GAME_OPTIONS_BACKGROUND), SetStringTip(STR_GAME_OPTIONS_BASE_MUSIC), SetTextStyle(GAME_OPTIONS_FRAME), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
            NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
              NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_DROPDOWN), SetToolTip(STR_GAME_OPTIONS_BASE_MUSIC_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
              NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_CONTENT_DOWNLOAD), SetStringTip(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), SetMinimalTextLines(1, 0), SetToolTip(STR_GAME_OPTIONS_BASE_MUSIC_DESCRIPTION_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
              NWidget(NWID_VERTICAL), SetPIPRatio(0, 0, 1),
                NWidget(WWT_PUSHIMGBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_JUKEBOX), SetToolbarMinimalSize(1), SetSpriteTip(SPR_IMG_MUSIC, STR_TOOLBAR_TOOLTIP_SHOW_SOUND_MUSIC_WINDOW),
              EndContainer(),
            EndContainer(),
            NWidget(NWID_VERTICAL),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_OPEN_URL), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_CONTENT_OPEN_URL, STR_CONTENT_OPEN_URL_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_README, STR_TEXTFILE_VIEW_README_TOOLTIP),
              EndContainer(),
              NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_TEXTFILE_VIEW_CHANGELOG_TOOLTIP),
                NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_BASE_MUSIC_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_TEXTFILE_VIEW_LICENCE, STR_TEXTFILE_VIEW_LICENCE_TOOLTIP),
              EndContainer(),
            EndContainer(),
          EndContainer(),
        EndContainer(),
        NWidget(NWID_SPACER), SetFill(1, 1), SetResize(1, 1), // Allows this pane to resize
      EndContainer(),
 
      /* Social tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse_resize),
        NWidgetFunction(MakeNWidgetSocialPlugins),
        NWidget(NWID_SPACER), SetFill(1, 1), SetResize(1, 1), // Allows this pane to resize
      EndContainer(),
 
      /* Advanced settings tab */
      NWidget(NWID_VERTICAL), SetPadding(WidgetDimensions::unscaled.sparse_resize), SetPIP(0, WidgetDimensions::unscaled.vsep_sparse, 0),
        NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_RESTRICT_CATEGORY), SetStringTip(STR_CONFIG_SETTING_RESTRICT_CATEGORY), SetTextStyle(GAME_OPTIONS_LABEL),
            NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_RESTRICT_DROPDOWN), SetToolTip(STR_CONFIG_SETTING_RESTRICT_DROPDOWN_HELPTEXT), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR, WID_GO_RESTRICT_TYPE), SetStringTip(STR_CONFIG_SETTING_RESTRICT_TYPE), SetTextStyle(GAME_OPTIONS_LABEL),
            NWidget(WWT_DROPDOWN, GAME_OPTIONS_BUTTON, WID_GO_TYPE_DROPDOWN), SetToolTip(STR_CONFIG_SETTING_TYPE_DROPDOWN_HELPTEXT), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
          NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
            NWidget(WWT_TEXT, INVALID_COLOUR), SetFill(0, 1), SetStringTip(STR_CONFIG_SETTING_FILTER_TITLE), SetTextStyle(GAME_OPTIONS_LABEL),
            NWidget(WWT_EDITBOX, GAME_OPTIONS_BACKGROUND, WID_GO_FILTER), SetStringTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP), SetFill(1, 0), SetResize(1, 0),
          EndContainer(),
        EndContainer(),
 
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_PANEL, GAME_OPTIONS_BACKGROUND, WID_GO_OPTIONSPANEL), SetFill(1, 1), SetResize(1, 1), SetScrollbar(WID_GO_SCROLLBAR),
          EndContainer(),
          NWidget(NWID_VSCROLLBAR, GAME_OPTIONS_BACKGROUND, WID_GO_SCROLLBAR),
        EndContainer(),
 
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
          NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_EXPAND_ALL), SetStringTip(STR_CONFIG_SETTING_EXPAND_ALL), SetFill(1, 0), SetResize(1, 0),
          NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_COLLAPSE_ALL), SetStringTip(STR_CONFIG_SETTING_COLLAPSE_ALL), SetFill(1, 0), SetResize(1, 0),
          NWidget(WWT_PUSHTXTBTN, GAME_OPTIONS_BUTTON, WID_GO_RESET_ALL), SetStringTip(STR_CONFIG_SETTING_RESET_ALL), SetFill(1, 0), SetResize(1, 0),
        EndContainer(),
 
        NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_SETTING_PROPERTIES), SetFill(1, 0), SetResize(1, 0),
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_EMPTY, INVALID_COLOUR, WID_GO_HELP_TEXT), SetFill(1, 0), SetResize(1, 0), SetScrollbar(WID_GO_HELP_TEXT_SCROLL),
          NWidget(NWID_VSCROLLBAR, GAME_OPTIONS_BACKGROUND, WID_GO_HELP_TEXT_SCROLL),
        EndContainer(),
      EndContainer(),
    EndContainer(),
 
    NWidget(NWID_HORIZONTAL),
      NWidget(NWID_SPACER), SetFill(1, 0), SetResize(1, 0),
      NWidget(WWT_RESIZEBOX, GAME_OPTIONS_BACKGROUND), SetResizeWidgetTypeTip(RWV_HIDE_BEVEL, STR_TOOLTIP_RESIZE),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _game_options_desc(
  WDP_CENTER, "game_options", 0, 0,
  WC_GAME_OPTIONS, WC_NONE,
  {},
  _nested_game_options_widgets
);
 
void ShowGameOptions()
{
  CloseWindowByClass(WC_GAME_OPTIONS);
  new GameOptionsWindow(_game_options_desc);
}
void ShowGameOptions() {…}
 
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) ? FrameFlag::Lowered : FrameFlags{});
  DrawFrameRect(rr, button_colour, (state == 2) ? FrameFlag::Lowered : FrameFlags{});
  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 DrawArrowButtons(int x, int y, Colours button_colour, uint8_t state, bool clickable_left, bool clickable_right) {…}
 
void DrawUpDownButtons(int x, int y, Colours button_colour, uint8_t state, bool clickable_up, bool clickable_down)
{
  int colour = GetColourGradient(button_colour, SHADE_DARKER);
 
  Rect r = {x, y, x + SETTING_BUTTON_WIDTH - 1, y + SETTING_BUTTON_HEIGHT - 1};
  Rect ur = r.WithWidth(SETTING_BUTTON_WIDTH / 2, (_current_text_dir == TD_RTL));
  Rect dr = r.WithWidth(SETTING_BUTTON_WIDTH / 2, (_current_text_dir != TD_RTL));
 
  DrawFrameRect(ur, button_colour, (state == 1) ? FrameFlag::Lowered : FrameFlags{});
  DrawFrameRect(dr, button_colour, (state == 2) ? FrameFlag::Lowered : FrameFlags{});
  DrawSpriteIgnorePadding(SPR_ARROW_UP, PAL_NONE, ur, SA_CENTER);
  DrawSpriteIgnorePadding(SPR_ARROW_DOWN, PAL_NONE, dr, SA_CENTER);
 
  /* Grey out the buttons that aren't clickable */
  if (!clickable_up) GfxFillRect(ur.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
  if (!clickable_down) GfxFillRect(dr.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
}
void DrawUpDownButtons(int x, int y, Colours button_colour, uint8_t state, bool clickable_up, bool clickable_down) {…}
 
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 ? FrameFlag::Lowered : FrameFlags{});
  DrawSpriteIgnorePadding(SPR_ARROW_DOWN, PAL_NONE, r, SA_CENTER);
 
  if (!clickable) {
    GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), colour, FILLRECT_CHECKER);
  }
}
void DrawDropDownButton(int x, int y, Colours button_colour, bool state, bool clickable) {…}
 
void DrawBoolButton(int x, int y, Colours button_colour, Colours background, bool state, bool clickable)
{
  Rect r = {x, y, x + SETTING_BUTTON_WIDTH - 1, y + SETTING_BUTTON_HEIGHT - 1};
  DrawFrameRect(r, state ? COLOUR_GREEN : background, state ? FrameFlags{FrameFlag::Lowered} : FrameFlags{FrameFlag::Lowered, FrameFlag::BorderOnly});
  if (!clickable) {
    GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(state ? COLOUR_GREEN : background, SHADE_DARKER), FILLRECT_CHECKER);
  }
 
  Rect button_rect = r.WithWidth(SETTING_BUTTON_WIDTH / 3, state ^ (_current_text_dir == TD_RTL));
  DrawFrameRect(button_rect, button_colour, {});
  if (!clickable) {
    GfxFillRect(button_rect.Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(button_colour, SHADE_DARKER), FILLRECT_CHECKER);
  }
}
void DrawBoolButton(int x, int y, Colours button_colour, Colours background, bool state, bool clickable) {…}
 
struct CustomCurrencyWindow : Window {
  WidgetID 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);
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    switch (widget) {
      case WID_CC_RATE:      return GetString(STR_CURRENCY_EXCHANGE_RATE, 1, 1);
      case WID_CC_SEPARATOR: return GetString(STR_CURRENCY_SEPARATOR, GetCustomCurrency().separator);
      case WID_CC_PREFIX:    return GetString(STR_CURRENCY_PREFIX, GetCustomCurrency().prefix);
      case WID_CC_SUFFIX:    return GetString(STR_CURRENCY_SUFFIX, GetCustomCurrency().suffix);
      case WID_CC_YEAR:
        return GetString((GetCustomCurrency().to_euro != CF_NOEURO) ? STR_CURRENCY_SWITCH_TO_EURO : STR_CURRENCY_SWITCH_TO_EURO_NEVER, GetCustomCurrency().to_euro);
 
      case WID_CC_PREVIEW:
        return GetString(STR_CURRENCY_PREVIEW, 10000);
 
      default:
        return this->Window::GetWidgetString(widget, stringid);
    }
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
 
  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:
        size = GetStringBoundingBox(GetString(STR_CURRENCY_EXCHANGE_RATE, 1, INT32_MAX));
        break;
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    int line = 0;
    int len = 0;
    std::string str;
    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:
        str = GetString(STR_JUST_INT, GetCustomCurrency().rate);
        len = 5;
        line = WID_CC_RATE;
        afilter = CS_NUMERAL;
        break;
 
      case WID_CC_SEPARATOR_EDIT:
      case WID_CC_SEPARATOR:
        str = GetCustomCurrency().separator;
        len = 7;
        line = WID_CC_SEPARATOR;
        break;
 
      case WID_CC_PREFIX_EDIT:
      case WID_CC_PREFIX:
        str = GetCustomCurrency().prefix;
        len = 15;
        line = WID_CC_PREFIX;
        break;
 
      case WID_CC_SUFFIX_EDIT:
      case WID_CC_SUFFIX:
        str = GetCustomCurrency().suffix;
        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:
        str = GetString(STR_JUST_INT, GetCustomCurrency().to_euro);
        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, {});
    }
 
    this->SetTimeout();
    this->SetDirty();
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OnQueryTextFinished(std::optional<std::string> str) override
  {
    if (!str.has_value()) return;
 
    switch (this->query_widget) {
      case WID_CC_RATE: {
        auto val = ParseInteger(*str, 10, true);
        if (!val.has_value()) return;
        GetCustomCurrency().rate = Clamp(*val, 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 year = CF_NOEURO;
        if (!str->empty()) {
          auto val = ParseInteger(*str, 10, true);
          if (!val.has_value()) return;
          year = Clamp(static_cast<TimerGameCalendar::Year>(*val), MIN_EURO_YEAR, CalendarTime::MAX_YEAR);
        }
        GetCustomCurrency().to_euro = year;
        break;
      }
    }
    MarkWholeScreenDirty();
    SetButtonState();
  }
  void OnQueryTextFinished(std::optional<std::string> str) override {…}
 
  void OnTimeout() override
  {
    this->SetDirty();
  }
  void OnTimeout() override {…}
};
struct CustomCurrencyWindow : Window {…};
 
static constexpr NWidgetPart _nested_cust_currency_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetStringTip(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, NWidContainerFlag::EqualSize), SetPIP(0, WidgetDimensions::unscaled.vsep_normal, 0),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_RATE_DOWN), SetArrowWidgetTypeTip(AWV_DECREASE, STR_CURRENCY_DECREASE_EXCHANGE_RATE_TOOLTIP),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_RATE_UP), SetArrowWidgetTypeTip(AWV_INCREASE, STR_CURRENCY_INCREASE_EXCHANGE_RATE_TOOLTIP),
          EndContainer(),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CC_RATE), SetToolTip(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), SetToolTip(STR_CURRENCY_SET_CUSTOM_CURRENCY_SEPARATOR_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CC_SEPARATOR), SetToolTip(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), SetToolTip(STR_CURRENCY_SET_CUSTOM_CURRENCY_PREFIX_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CC_PREFIX), SetToolTip(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), SetToolTip(STR_CURRENCY_SET_CUSTOM_CURRENCY_SUFFIX_TOOLTIP), SetFill(0, 1),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CC_SUFFIX), SetToolTip(STR_CURRENCY_SET_CUSTOM_CURRENCY_SUFFIX_TOOLTIP), SetFill(1, 0),
        EndContainer(),
        NWidget(NWID_HORIZONTAL), SetPIP(0, WidgetDimensions::unscaled.hsep_wide, 0),
          NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_YEAR_DOWN), SetArrowWidgetTypeTip(AWV_DECREASE, STR_CURRENCY_DECREASE_CUSTOM_CURRENCY_TO_EURO_TOOLTIP),
            NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_CC_YEAR_UP), SetArrowWidgetTypeTip(AWV_INCREASE, STR_CURRENCY_INCREASE_CUSTOM_CURRENCY_TO_EURO_TOOLTIP),
          EndContainer(),
          NWidget(WWT_TEXT, INVALID_COLOUR, WID_CC_YEAR), SetToolTip(STR_CURRENCY_SET_CUSTOM_CURRENCY_TO_EURO_TOOLTIP), SetFill(1, 0),
        EndContainer(),
      EndContainer(),
      NWidget(WWT_LABEL, INVALID_COLOUR, WID_CC_PREVIEW),
          SetToolTip(STR_CURRENCY_CUSTOM_CURRENCY_PREVIEW_TOOLTIP),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _cust_currency_desc(
  WDP_CENTER, {}, 0, 0,
  WC_CUSTOM_CURRENCY, WC_NONE,
  {},
  _nested_cust_currency_widgets
);
 
static void ShowCustCurrency()
{
  CloseWindowById(WC_CUSTOM_CURRENCY, 0);
  new CustomCurrencyWindow(_cust_currency_desc);
}
static void ShowCustCurrency() {…}