misc_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 "debug.h"
#include "landscape.h"
#include "error.h"
#include "gui.h"
#include "gfx_layout.h"
#include "command_func.h"
#include "company_func.h"
#include "town.h"
#include "string_func.h"
#include "company_base.h"
#include "texteff.hpp"
#include "strings_func.h"
#include "window_func.h"
#include "querystring_gui.h"
#include "core/geometry_func.hpp"
#include "newgrf_debug.h"
#include "zoom_func.h"
#include "viewport_func.h"
#include "landscape_cmd.h"
#include "rev.h"
#include "timer/timer.h"
#include "timer/timer_window.h"
#include "pathfinder/water_regions.h"
 
#include "widgets/misc_widget.h"
 
#include "table/strings.h"
 
#include "safeguards.h"
 
enum OskActivation : uint8_t {
  OSKA_DISABLED,           
  OSKA_DOUBLE_CLICK,       
  OSKA_SINGLE_CLICK,       
  OSKA_IMMEDIATELY,        
};
enum OskActivation : uint8_t {…};
 
 
static constexpr NWidgetPart _nested_land_info_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetStringTip(STR_LAND_AREA_INFORMATION_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_LI_LOCATION), SetAspect(WidgetDimensions::ASPECT_LOCATION), SetSpriteTip(SPR_GOTO_LOCATION, STR_LAND_AREA_INFORMATION_LOCATION_TOOLTIP),
    NWidget(WWT_DEBUGBOX, COLOUR_GREY),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY, WID_LI_BACKGROUND), EndContainer(),
};
 
static WindowDesc _land_info_desc(
  WDP_AUTO, {}, 0, 0,
  WC_LAND_INFO, WC_NONE,
  {},
  _nested_land_info_widgets
);
 
class LandInfoWindow : public Window {
  StringList landinfo_data{}; 
  std::string cargo_acceptance{}; 
 
public:
  TileIndex tile = INVALID_TILE;
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_LI_BACKGROUND) return;
 
    Rect ir = r.Shrink(WidgetDimensions::scaled.frametext);
    for (size_t i = 0; i < this->landinfo_data.size(); i++) {
      DrawString(ir, this->landinfo_data[i], i == 0 ? TC_LIGHT_BLUE : TC_FROMSTRING, SA_HOR_CENTER);
      ir.top += GetCharacterHeight(FS_NORMAL) + (i == 0 ? WidgetDimensions::scaled.vsep_wide : WidgetDimensions::scaled.vsep_normal);
    }
 
    if (!this->cargo_acceptance.empty()) {
      DrawStringMultiLine(ir, GetString(STR_JUST_RAW_STRING, this->cargo_acceptance), TC_FROMSTRING, SA_CENTER);
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget != WID_LI_BACKGROUND) return;
 
    size.height = WidgetDimensions::scaled.frametext.Vertical();
    for (size_t i = 0; i < this->landinfo_data.size(); i++) {
      uint width = GetStringBoundingBox(this->landinfo_data[i]).width + WidgetDimensions::scaled.frametext.Horizontal();
      size.width = std::max(size.width, width);
 
      size.height += GetCharacterHeight(FS_NORMAL) + (i == 0 ? WidgetDimensions::scaled.vsep_wide : WidgetDimensions::scaled.vsep_normal);
    }
 
    if (!this->cargo_acceptance.empty()) {
      uint width = GetStringBoundingBox(this->cargo_acceptance).width + WidgetDimensions::scaled.frametext.Horizontal();
      size.width = std::max(size.width, std::min(static_cast<uint>(ScaleGUITrad(300)), width));
      size.height += GetStringHeight(GetString(STR_JUST_RAW_STRING, this->cargo_acceptance), size.width - WidgetDimensions::scaled.frametext.Horizontal());
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  LandInfoWindow(Tile tile) : Window(_land_info_desc), tile(tile)
  {
    this->InitNested();
 
#if defined(_DEBUG)
# define LANDINFOD_LEVEL 0
#else
# define LANDINFOD_LEVEL 1
#endif
    Debug(misc, LANDINFOD_LEVEL, "TILE: {0} (0x{0:x}) ({1},{2})", (TileIndex)tile, TileX(tile), TileY(tile));
    Debug(misc, LANDINFOD_LEVEL, "type   = 0x{:x}", tile.type());
    Debug(misc, LANDINFOD_LEVEL, "height = 0x{:x}", tile.height());
    Debug(misc, LANDINFOD_LEVEL, "m1     = 0x{:x}", tile.m1());
    Debug(misc, LANDINFOD_LEVEL, "m2     = 0x{:x}", tile.m2());
    Debug(misc, LANDINFOD_LEVEL, "m3     = 0x{:x}", tile.m3());
    Debug(misc, LANDINFOD_LEVEL, "m4     = 0x{:x}", tile.m4());
    Debug(misc, LANDINFOD_LEVEL, "m5     = 0x{:x}", tile.m5());
    Debug(misc, LANDINFOD_LEVEL, "m6     = 0x{:x}", tile.m6());
    Debug(misc, LANDINFOD_LEVEL, "m7     = 0x{:x}", tile.m7());
    Debug(misc, LANDINFOD_LEVEL, "m8     = 0x{:x}", tile.m8());
 
    PrintWaterRegionDebugInfo(tile);
#undef LANDINFOD_LEVEL
  }
 
  void OnInit() override
  {
    Town *t = ClosestTownFromTile(tile, _settings_game.economy.dist_local_authority);
 
    TileDesc td{};
    td.owner_type[0] = STR_LAND_AREA_INFORMATION_OWNER; // At least one owner is displayed, though it might be "N/A".
 
    CargoArray acceptance{};
    AddAcceptedCargo(tile, acceptance, nullptr);
    GetTileDesc(tile, td);
 
    this->landinfo_data.clear();
 
    /* Tiletype */
    this->landinfo_data.push_back(GetString(td.str, td.dparam));
 
    /* Up to four owners */
    for (uint i = 0; i < 4; i++) {
      if (td.owner_type[i] == STR_NULL) continue;
 
      if (td.owner[i] == OWNER_NONE || td.owner[i] == OWNER_WATER) {
        this->landinfo_data.push_back(GetString(td.owner_type[i], STR_LAND_AREA_INFORMATION_OWNER_N_A, std::monostate{}));
      } else {
        auto params = GetParamsForOwnedBy(td.owner[i], tile);
        this->landinfo_data.push_back(GetStringWithArgs(td.owner_type[i], params));
      }
    }
 
    /* Cost to clear/revenue when cleared */
    Company *c = Company::GetIfValid(_local_company);
    if (c != nullptr) {
      assert(_current_company == _local_company);
      CommandCost costclear = Command<CMD_LANDSCAPE_CLEAR>::Do(DoCommandFlag::QueryCost, tile);
      if (costclear.Succeeded()) {
        Money cost = costclear.GetCost();
        StringID str;
        if (cost < 0) {
          cost = -cost; // Negate negative cost to a positive revenue
          str = STR_LAND_AREA_INFORMATION_REVENUE_WHEN_CLEARED;
        } else {
          str = STR_LAND_AREA_INFORMATION_COST_TO_CLEAR;
        }
        this->landinfo_data.push_back(GetString(str, cost));
      } else {
        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_COST_TO_CLEAR_N_A));
      }
    } else {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_COST_TO_CLEAR_N_A));
    }
 
    /* Location */
    this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LANDINFO_COORDS, TileX(tile), TileY(tile), GetTileZ(tile)));
 
    /* Tile index */
    this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LANDINFO_INDEX, tile, tile));
 
    /* Local authority */
    if (t == nullptr) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY, STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY_NONE, std::monostate{}));
    } else {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY, STR_TOWN_NAME, t->index));
    }
 
    /* Build date */
    if (td.build_date != CalendarTime::INVALID_DATE) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_BUILD_DATE, td.build_date));
    }
 
    /* Station class */
    if (td.station_class != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_STATION_CLASS, td.station_class));
    }
 
    /* Station type name */
    if (td.station_name != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_STATION_TYPE, td.station_name));
    }
 
    /* Airport class */
    if (td.airport_class != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORT_CLASS, td.airport_class));
    }
 
    /* Airport name */
    if (td.airport_name != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORT_NAME, td.airport_name));
    }
 
    /* Airport tile name */
    if (td.airport_tile_name != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORTTILE_NAME, td.airport_tile_name));
    }
 
    /* Rail type name */
    if (td.railtype != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_RAIL_TYPE, td.railtype));
    }
 
    /* Rail speed limit */
    if (td.rail_speed != 0) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_RAIL_SPEED_LIMIT, PackVelocity(td.rail_speed, VEH_TRAIN)));
    }
 
    /* Road type name */
    if (td.roadtype != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_ROAD_TYPE, td.roadtype));
    }
 
    /* Road speed limit */
    if (td.road_speed != 0) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_ROAD_SPEED_LIMIT, PackVelocity(td.road_speed, VEH_ROAD)));
    }
 
    /* Tram type name */
    if (td.tramtype != STR_NULL) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_TRAM_TYPE, td.tramtype));
    }
 
    /* Tram speed limit */
    if (td.tram_speed != 0) {
      this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_TRAM_SPEED_LIMIT, PackVelocity(td.tram_speed, VEH_ROAD)));
    }
 
    /* Tile protection status */
    if (td.town_can_upgrade.has_value()) {
      this->landinfo_data.push_back(GetString(td.town_can_upgrade.value() ? STR_LAND_AREA_INFORMATION_TOWN_CAN_UPGRADE : STR_LAND_AREA_INFORMATION_TOWN_CANNOT_UPGRADE));
    }
 
    /* NewGRF name */
    if (td.grf.has_value()) {
      this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_NEWGRF_NAME, std::move(*td.grf)));
    }
 
    /* Cargo acceptance is displayed in a extra multiline */
    auto line = BuildCargoAcceptanceString(acceptance, STR_LAND_AREA_INFORMATION_CARGO_ACCEPTED);
    if (line.has_value()) {
      this->cargo_acceptance = std::move(*line);
    } else {
      this->cargo_acceptance.clear();
    }
  }
  void OnInit() override {…}
 
  bool IsNewGRFInspectable() const override
  {
    return ::IsNewGRFInspectable(GetGrfSpecFeature(this->tile), this->tile.base());
  }
  bool IsNewGRFInspectable() const override {…}
 
  void ShowNewGRFInspectWindow() const override
  {
    ::ShowNewGRFInspectWindow(GetGrfSpecFeature(this->tile), this->tile.base());
  }
  void ShowNewGRFInspectWindow() const override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_LI_LOCATION:
        if (_ctrl_pressed) {
          ShowExtraViewportWindow(this->tile);
        } else {
          ScrollMainWindowToTile(this->tile);
        }
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
 
    /* ReInit, "debug" sprite might have changed */
    if (data == 1) this->ReInit();
  }
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override {…}
};
class LandInfoWindow : public Window {…};
 
void ShowLandInfo(TileIndex tile)
{
  CloseWindowById(WC_LAND_INFO, 0);
  new LandInfoWindow(tile);
}
void ShowLandInfo(TileIndex tile) {…}
 
static constexpr NWidgetPart _nested_about_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetStringTip(STR_ABOUT_OPENTTD, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY), SetPIP(4, 2, 4),
    NWidget(WWT_LABEL, INVALID_COLOUR), SetStringTip(STR_ABOUT_ORIGINAL_COPYRIGHT),
    NWidget(WWT_LABEL, INVALID_COLOUR), SetStringTip(STR_ABOUT_VERSION),
    NWidget(WWT_FRAME, COLOUR_GREY), SetPadding(0, 5, 1, 5),
      NWidget(WWT_EMPTY, INVALID_COLOUR, WID_A_SCROLLING_TEXT),
    EndContainer(),
    NWidget(WWT_LABEL, INVALID_COLOUR, WID_A_WEBSITE),
    NWidget(WWT_LABEL, INVALID_COLOUR, WID_A_COPYRIGHT),
  EndContainer(),
};
 
static WindowDesc _about_desc(
  WDP_CENTER, {}, 0, 0,
  WC_GAME_OPTIONS, WC_NONE,
  {},
  _nested_about_widgets
);
 
static const std::initializer_list<const std::string_view> _credits = {
  "Original design by Chris Sawyer",
  "Original graphics by Simon Foster",
  "",
  "The OpenTTD team (in alphabetical order):",
  "  Matthijs Kooijman (blathijs) - Pathfinder-guru, Debian port (since 0.3)",
  "  Christoph Elsenhans (frosch) - General coding (since 0.6)",
  "  Lo\u00efc Guilloux (glx) - General / Windows Expert (since 0.4.5)",
  "  Koen Bussemaker (Kuhnovic) - General / Ship pathfinder (since 14)",
  "  Charles Pigott (LordAro) - General / Correctness police (since 1.9)",
  "  Michael Lutz (michi_cc) - Path based signals (since 0.7)",
  "  Niels Martin Hansen (nielsm) - Music system, general coding (since 1.9)",
  "  Owen Rudge (orudge) - Forum host, OS/2 port (since 0.1)",
  "  Peter Nelson (peter1138) - Spiritual descendant from NewGRF gods (since 0.4.5)",
  "  Remko Bijker (Rubidium) - Coder and way more (since 0.4.5)",
  "  Patric Stout (TrueBrain) - NoProgrammer (since 0.3), sys op",
  "  Tyler Trahan (2TallTyler) - General / Time Lord (since 13)",
  "  Richard Wheeler (zephyris) - Precision pixel production (since 15)",
  "",
  "Inactive Developers:",
  "  Grzegorz Duczy\u0144ski (adf88) - General coding (1.7 - 1.8)",
  "  Albert Hofkamp (Alberth) - GUI expert (0.7 - 1.9)",
  "  Jean-Fran\u00e7ois Claeys (Belugas) - GUI, NewGRF and more (0.4.5 - 1.0)",
  "  Bjarni Corfitzen (Bjarni) - MacOSX port, coder and vehicles (0.3 - 0.7)",
  "  Victor Fischer (Celestar) - Programming everywhere you need him to (0.3 - 0.6)",
  "  Ulf Hermann (fonsinchen) - Cargo Distribution (1.3 - 1.6)",
  "  Jaroslav Mazanec (KUDr) - YAPG (Yet Another Pathfinder God) ;) (0.4.5 - 0.6)",
  "  Jonathan Coome (Maedhros) - High priest of the NewGRF Temple (0.5 - 0.6)",
  "  Attila B\u00e1n (MiHaMiX) - Developer WebTranslator 1 and 2 (0.3 - 0.5)",
  "  Ingo von Borstel (planetmaker) - General coding, Support (1.1 - 1.9)",
  "  Zden\u011bk Sojka (SmatZ) - Bug finder and fixer (0.6 - 1.3)",
  "  Jos\u00e9 Soler (Terkhen) - General coding (1.0 - 1.4)",
  "  Christoph Mallon (Tron) - Programmer, code correctness police (0.3 - 0.5)",
  "  Thijs Marinussen (Yexo) - AI Framework, General (0.6 - 1.3)",
  "  Leif Linse (Zuu) - AI/Game Script (1.2 - 1.6)",
  "",
  "Retired Developers:",
  "  Tam\u00e1s Farag\u00f3 (Darkvater) - Ex-Lead coder (0.3 - 0.5)",
  "  Dominik Scherer (dominik81) - Lead programmer, GUI expert (0.3 - 0.3)",
  "  Emil Djupfeld (egladil) - MacOSX (0.4.5 - 0.6)",
  "  Simon Sasburg (HackyKid) - Many bugfixes (0.4 - 0.4.5)",
  "  Ludvig Strigeus (ludde) - Original author of OpenTTD, main coder (0.1 - 0.3)",
  "  Cian Duffy (MYOB) - BeOS port / manual writing (0.1 - 0.3)",
  "  Petr Baudi\u0161 (pasky) - Many patches, NewGRF support (0.3 - 0.3)",
  "  Benedikt Br\u00fcggemeier (skidd13) - Bug fixer and code reworker (0.6 - 0.7)",
  "  Serge Paquet (vurlix) - 2nd contributor after ludde (0.1 - 0.3)",
  "",
  "Special thanks go out to:",
  "  Josef Drexler - For his great work on TTDPatch",
  "  Marcin Grzegorczyk - Track foundations and for describing TTD internals",
  "  Stefan Mei\u00dfner (sign_de) - For his work on the console",
  "  Mike Ragsdale - OpenTTD installer",
  "  Christian Rosentreter (tokai) - MorphOS / AmigaOS port",
  "  Richard Kempton (richK) - additional airports, initial TGP implementation",
  "  Alberto Demichelis - Squirrel scripting language \u00a9 2003-2008",
  "  L. Peter Deutsch - MD5 implementation \u00a9 1999, 2000, 2002",
  "  Michael Blunck - Pre-signals and semaphores \u00a9 2003",
  "  George - Canal/Lock graphics \u00a9 2003-2004",
  "  Andrew Parkhouse (andythenorth) - River graphics",
  "  David Dallaston (Pikka) - Tram tracks",
  "  All Translators - Who made OpenTTD a truly international game",
  "  Bug Reporters - Without whom OpenTTD would still be full of bugs!",
  "",
  "",
  "And last but not least:",
  "  Chris Sawyer - For an amazing game!"
};
 
struct AboutWindow : public Window {
  int text_position = 0; 
  int line_height = 0; 
  static const int num_visible_lines = 19; 
 
  AboutWindow() : Window(_about_desc)
  {
    this->InitNested(WN_GAME_OPTIONS_ABOUT);
 
    this->text_position = this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y + this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->current_y;
  }
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    if (widget == WID_A_WEBSITE) return "Website: https://www.openttd.org";
    if (widget == WID_A_COPYRIGHT) return GetString(STR_ABOUT_COPYRIGHT_OPENTTD, _openttd_revision_year);
    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
  {
    if (widget != WID_A_SCROLLING_TEXT) return;
 
    this->line_height = GetCharacterHeight(FS_NORMAL);
 
    Dimension d;
    d.height = this->line_height * num_visible_lines;
 
    d.width = 0;
    for (const auto &str : _credits) {
      d.width = std::max(d.width, GetStringBoundingBox(str).width);
    }
    size = maxdim(size, d);
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_A_SCROLLING_TEXT) return;
 
    int y = this->text_position;
 
    /* Show all scrolling _credits */
    for (const auto &str : _credits) {
      if (y >= r.top + 7 && y < r.bottom - this->line_height) {
        DrawString(r.left, r.right, y, str, TC_BLACK, SA_LEFT | SA_FORCE);
      }
      y += this->line_height;
    }
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  const IntervalTimer<TimerWindow> scroll_interval = {std::chrono::milliseconds(2100) / GetCharacterHeight(FS_NORMAL), [this](uint count) {
    this->text_position -= count;
    /* If the last text has scrolled start a new from the start */
    if (this->text_position < (int)(this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y - std::size(_credits) * this->line_height)) {
      this->text_position = this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->pos_y + this->GetWidget<NWidgetBase>(WID_A_SCROLLING_TEXT)->current_y;
    }
    this->SetWidgetDirty(WID_A_SCROLLING_TEXT);
  }};
  const IntervalTimer<TimerWindow> scroll_interval = {std::chrono::milliseconds(2100) / GetCharacterHeight(FS_NORMAL), [this](uint count) {…};
};
struct AboutWindow : public Window {…};
 
void ShowAboutWindow()
{
  CloseWindowByClass(WC_GAME_OPTIONS);
  new AboutWindow();
}
 
void ShowEstimatedCostOrIncome(Money cost, int x, int y)
{
  StringID msg = STR_MESSAGE_ESTIMATED_COST;
 
  if (cost < 0) {
    cost = -cost;
    msg = STR_MESSAGE_ESTIMATED_INCOME;
  }
  ShowErrorMessage(GetEncodedString(msg, cost), {}, WL_INFO, x, y);
}
void ShowEstimatedCostOrIncome(Money cost, int x, int y) {…}
 
void ShowCostOrIncomeAnimation(int x, int y, int z, Money cost)
{
  if (cost == 0) {
    return;
  }
  Point pt = RemapCoords(x, y, z);
  StringID msg = STR_INCOME_FLOAT_COST;
 
  if (cost < 0) {
    cost = -cost;
    msg = STR_INCOME_FLOAT_INCOME;
  }
  AddTextEffect(GetEncodedString(msg, cost), pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
}
void ShowCostOrIncomeAnimation(int x, int y, int z, Money cost) {…}
 
void ShowFeederIncomeAnimation(int x, int y, int z, Money transfer, Money income)
{
  Point pt = RemapCoords(x, y, z);
 
  if (income == 0) {
    AddTextEffect(GetEncodedString(STR_FEEDER, transfer), pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
  } else {
    StringID msg = STR_FEEDER_COST;
    if (income < 0) {
      income = -income;
      msg = STR_FEEDER_INCOME;
    }
    AddTextEffect(GetEncodedString(msg, transfer, income), pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
  }
}
void ShowFeederIncomeAnimation(int x, int y, int z, Money transfer, Money income) {…}
 
TextEffectID ShowFillingPercent(int x, int y, int z, uint8_t percent, StringID string)
{
  Point pt = RemapCoords(x, y, z);
 
  assert(string != STR_NULL);
 
  return AddTextEffect(GetEncodedString(string, percent), pt.x, pt.y, 0, TE_STATIC);
}
TextEffectID ShowFillingPercent(int x, int y, int z, uint8_t percent, StringID string) {…}
 
void UpdateFillingPercent(TextEffectID te_id, uint8_t percent, StringID string)
{
  assert(string != STR_NULL);
 
  UpdateTextEffect(te_id, GetEncodedString(string, percent));
}
void UpdateFillingPercent(TextEffectID te_id, uint8_t percent, StringID string) {…}
 
void HideFillingPercent(TextEffectID *te_id)
{
  if (*te_id == INVALID_TE_ID) return;
 
  RemoveTextEffect(*te_id);
  *te_id = INVALID_TE_ID;
}
void HideFillingPercent(TextEffectID *te_id) {…}
 
static constexpr NWidgetPart _nested_tooltips_widgets[] = {
  NWidget(WWT_EMPTY, INVALID_COLOUR, WID_TT_BACKGROUND),
};
 
static WindowDesc _tool_tips_desc(
  WDP_MANUAL, {}, 0, 0, // Coordinates and sizes are not used,
  WC_TOOLTIPS, WC_NONE,
  {WindowDefaultFlag::NoFocus, WindowDefaultFlag::NoClose},
  _nested_tooltips_widgets
);
 
struct TooltipsWindow : public Window
{
  EncodedString text{}; 
  TooltipCloseCondition close_cond{}; 
 
  TooltipsWindow(Window *parent, EncodedString &&text, TooltipCloseCondition close_tooltip) : Window(_tool_tips_desc), text(std::move(text))
  {
    this->parent = parent;
    this->close_cond = close_tooltip;
 
    this->InitNested();
 
    this->flags.Reset(WindowFlag::WhiteBorder);
  }
 
  Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
  {
    /* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
     * Add a fixed distance 2 so the tooltip floats free from both bars.
     */
    int scr_top = GetMainViewTop() + 2;
    int scr_bot = GetMainViewBottom() - 2;
 
    Point pt;
 
    /* Correctly position the tooltip position, watch out for window and cursor size
     * Clamp value to below main toolbar and above statusbar. If tooltip would
     * go below window, flip it so it is shown above the cursor */
    pt.y = SoftClamp(_cursor.pos.y + _cursor.total_size.y + _cursor.total_offs.y + 5, scr_top, scr_bot);
    if (pt.y + sm_height > scr_bot) pt.y = std::min(_cursor.pos.y + _cursor.total_offs.y - 5, scr_bot) - sm_height;
    pt.x = sm_width >= _screen.width ? 0 : SoftClamp(_cursor.pos.x - (sm_width >> 1), 0, _screen.width - sm_width);
 
    return pt;
  }
  Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override {…}
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget != WID_TT_BACKGROUND) return;
 
    auto str = this->text.GetDecodedString();
    size.width  = std::min<uint>(GetStringBoundingBox(str).width, ScaleGUITrad(194));
    size.height = GetStringHeight(str, size.width);
 
    /* Increase slightly to have some space around the box. */
    size.width  += WidgetDimensions::scaled.framerect.Horizontal()  + WidgetDimensions::scaled.fullbevel.Horizontal();
    size.height += WidgetDimensions::scaled.framerect.Vertical()    + WidgetDimensions::scaled.fullbevel.Vertical();
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_TT_BACKGROUND) return;
    GfxFillRect(r, PC_BLACK);
    GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), PC_LIGHT_YELLOW);
 
    DrawStringMultiLine(r.Shrink(WidgetDimensions::scaled.framerect).Shrink(WidgetDimensions::scaled.fullbevel), this->text.GetDecodedString(), TC_BLACK, SA_CENTER);
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void OnMouseLoop() override
  {
    /* Always close tooltips when the cursor is not in our window. */
    if (!_cursor.in_window) {
      this->Close();
      return;
    }
 
    /* We can show tooltips while dragging tools. These are shown as long as
     * we are dragging the tool. Normal tooltips work with hover or rmb. */
    switch (this->close_cond) {
      case TCC_RIGHT_CLICK: if (!_right_button_down) this->Close(); break;
      case TCC_HOVER: if (!_mouse_hovering) this->Close(); break;
      case TCC_NONE: break;
 
      case TCC_EXIT_VIEWPORT: {
        Window *w = FindWindowFromPt(_cursor.pos.x, _cursor.pos.y);
        if (w == nullptr || IsPtInWindowViewport(w, _cursor.pos.x, _cursor.pos.y) == nullptr) this->Close();
        break;
      }
    }
  }
  void OnMouseLoop() override {…}
};
struct TooltipsWindow : public Window {…};
 
void GuiShowTooltips(Window *parent, EncodedString &&text, TooltipCloseCondition close_tooltip)
{
  CloseWindowById(WC_TOOLTIPS, 0);
 
  if (text.empty() || !_cursor.in_window) return;
 
  new TooltipsWindow(parent, std::move(text), close_tooltip);
}
void GuiShowTooltips(Window *parent, EncodedString &&text, TooltipCloseCondition close_tooltip) {…}
 
void QueryString::HandleEditBox(Window *w, WidgetID wid)
{
  if (w->IsWidgetGloballyFocused(wid) && this->text.HandleCaret()) {
    w->SetWidgetDirty(wid);
 
    /* For the OSK also invalidate the parent window */
    if (w->window_class == WC_OSK) w->InvalidateData();
  }
}
 
static int GetCaretWidth()
{
  return GetCharacterWidth(FS_NORMAL, '_');
}
 
static Rect ScrollEditBoxTextRect(Rect r, const Textbuf &tb)
{
  const int linewidth = tb.pixels + GetCaretWidth();
  const int boxwidth = r.Width();
  if (linewidth <= boxwidth) return r;
 
  /* Extend to cover whole string. This is left-aligned, adjusted by caret position. */
  r = r.WithWidth(linewidth, false);
 
  /* Slide so that the caret is at the centre unless limited by bounds of the line, i.e. near either end. */
  return r.Translate(-std::clamp(tb.caretxoffs - (boxwidth / 2), 0, linewidth - boxwidth), 0);
}
static Rect ScrollEditBoxTextRect(Rect r, const Textbuf &tb) {…}
 
void QueryString::DrawEditBox(const Window *w, WidgetID wid) const
{
  const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
 
  assert((wi->type & WWT_MASK) == WWT_EDITBOX);
 
  bool rtl = _current_text_dir == TD_RTL;
  Dimension sprite_size = GetScaledSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
  int clearbtn_width = sprite_size.width + WidgetDimensions::scaled.imgbtn.Horizontal();
 
  Rect r = wi->GetCurrentRect();
  Rect cr = r.WithWidth(clearbtn_width, !rtl);
  Rect fr = r.Indent(clearbtn_width, !rtl);
 
  DrawFrameRect(cr, wi->colour, wi->IsLowered() ? FrameFlag::Lowered : FrameFlags{});
  DrawSpriteIgnorePadding(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT, PAL_NONE, cr, SA_CENTER);
  if (this->text.GetText().empty()) GfxFillRect(cr.Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(wi->colour, SHADE_DARKER), FILLRECT_CHECKER);
 
  DrawFrameRect(fr, wi->colour, {FrameFlag::Lowered, FrameFlag::Darkened});
  GfxFillRect(fr.Shrink(WidgetDimensions::scaled.bevel), PC_BLACK);
 
  fr = fr.Shrink(WidgetDimensions::scaled.framerect);
  /* Limit the drawing of the string inside the widget boundaries */
  DrawPixelInfo dpi;
  if (!FillDrawPixelInfo(&dpi, fr)) return;
  /* Keep coordinates relative to the window. */
  dpi.left += fr.left;
  dpi.top += fr.top;
 
  AutoRestoreBackup dpi_backup(_cur_dpi, &dpi);
 
  /* We will take the current widget length as maximum width, with a small
   * space reserved at the end for the caret to show */
  const Textbuf *tb = &this->text;
  fr = ScrollEditBoxTextRect(fr, *tb);
 
  /* If we have a marked area, draw a background highlight. */
  if (tb->marklength != 0) GfxFillRect(fr.left + tb->markxoffs, fr.top, fr.left + tb->markxoffs + tb->marklength - 1, fr.bottom, PC_GREY);
 
  DrawString(fr.left, fr.right, CentreBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), tb->GetText(), TC_YELLOW);
  bool focussed = w->IsWidgetGloballyFocused(wid) || IsOSKOpenedFor(w, wid);
  if (focussed && tb->caret) {
    int caret_width = GetCaretWidth();
    if (rtl) {
      DrawString(fr.right - tb->pixels + tb->caretxoffs - caret_width, fr.right - tb->pixels + tb->caretxoffs, CentreBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
    } else {
      DrawString(fr.left + tb->caretxoffs, fr.left + tb->caretxoffs + caret_width, CentreBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
    }
  }
}
 
Point QueryString::GetCaretPosition(const Window *w, WidgetID wid) const
{
  const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
 
  assert((wi->type & WWT_MASK) == WWT_EDITBOX);
 
  bool rtl = _current_text_dir == TD_RTL;
  Dimension sprite_size = GetScaledSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
  int clearbtn_width = sprite_size.width + WidgetDimensions::scaled.imgbtn.Horizontal();
 
  Rect r = wi->GetCurrentRect().Indent(clearbtn_width, !rtl).Shrink(WidgetDimensions::scaled.framerect);
 
  /* Clamp caret position to be inside out current width. */
  const Textbuf *tb = &this->text;
  r = ScrollEditBoxTextRect(r, *tb);
 
  Point pt = {r.left + tb->caretxoffs, r.top};
  return pt;
}
Point QueryString::GetCaretPosition(const Window *w, WidgetID wid) const {…}
 
Rect QueryString::GetBoundingRect(const Window *w, WidgetID wid, size_t from, size_t to) const
{
  const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
 
  assert((wi->type & WWT_MASK) == WWT_EDITBOX);
 
  bool rtl = _current_text_dir == TD_RTL;
  Dimension sprite_size = GetScaledSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
  int clearbtn_width = sprite_size.width + WidgetDimensions::scaled.imgbtn.Horizontal();
 
  Rect r = wi->GetCurrentRect().Indent(clearbtn_width, !rtl).Shrink(WidgetDimensions::scaled.framerect);
 
  /* Clamp caret position to be inside our current width. */
  const Textbuf *tb = &this->text;
  r = ScrollEditBoxTextRect(r, *tb);
 
  /* Get location of first and last character. */
  const auto p1 = GetCharPosInString(tb->GetText(), from, FS_NORMAL);
  const auto p2 = from != to ? GetCharPosInString(tb->GetText(), to, FS_NORMAL) : p1;
 
  return { Clamp(r.left + p1.left, r.left, r.right), r.top, Clamp(r.left + p2.right, r.left, r.right), r.bottom };
}
Rect QueryString::GetBoundingRect(const Window *w, WidgetID wid, size_t from, size_t to) const {…}
 
ptrdiff_t QueryString::GetCharAtPosition(const Window *w, WidgetID wid, const Point &pt) const
{
  const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
 
  assert((wi->type & WWT_MASK) == WWT_EDITBOX);
 
  bool rtl = _current_text_dir == TD_RTL;
  Dimension sprite_size = GetScaledSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
  int clearbtn_width = sprite_size.width + WidgetDimensions::scaled.imgbtn.Horizontal();
 
  Rect r = wi->GetCurrentRect().Indent(clearbtn_width, !rtl).Shrink(WidgetDimensions::scaled.framerect);
 
  if (!IsInsideMM(pt.y, r.top, r.bottom)) return -1;
 
  /* Clamp caret position to be inside our current width. */
  const Textbuf *tb = &this->text;
  r = ScrollEditBoxTextRect(r, *tb);
 
  return ::GetCharAtPosition(tb->GetText(), pt.x - r.left);
}
ptrdiff_t QueryString::GetCharAtPosition(const Window *w, WidgetID wid, const Point &pt) const {…}
 
void QueryString::ClickEditBox(Window *w, Point pt, WidgetID wid, int click_count, bool focus_changed)
{
  const NWidgetLeaf *wi = w->GetWidget<NWidgetLeaf>(wid);
 
  assert((wi->type & WWT_MASK) == WWT_EDITBOX);
 
  bool rtl = _current_text_dir == TD_RTL;
  Dimension sprite_size = GetScaledSpriteSize(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT);
  int clearbtn_width = sprite_size.width + WidgetDimensions::scaled.imgbtn.Horizontal();
 
  Rect cr = wi->GetCurrentRect().WithWidth(clearbtn_width, !rtl);
 
  if (IsInsideMM(pt.x, cr.left, cr.right)) {
    if (!this->text.GetText().empty()) {
      this->text.DeleteAll();
      w->HandleButtonClick(wid);
      w->OnEditboxChanged(wid);
    }
    return;
  }
 
  if (w->window_class != WC_OSK && _settings_client.gui.osk_activation != OSKA_DISABLED &&
    (!focus_changed || _settings_client.gui.osk_activation == OSKA_IMMEDIATELY) &&
    (click_count == 2 || _settings_client.gui.osk_activation != OSKA_DOUBLE_CLICK)) {
    /* Open the OSK window */
    ShowOnScreenKeyboard(w, wid);
  }
}
 
struct QueryStringWindow : public Window
{
  QueryString editbox; 
  QueryStringFlags flags{}; 
 
  QueryStringWindow(std::string_view str, StringID caption, uint max_bytes, uint max_chars, WindowDesc &desc, Window *parent, CharSetFilter afilter, QueryStringFlags flags) :
      Window(desc), editbox(max_bytes, max_chars)
  {
    this->editbox.text.Assign(str);
 
    if (!flags.Test(QueryStringFlag::AcceptUnchanged)) this->editbox.orig = this->editbox.text.GetText();
 
    this->querystrings[WID_QS_TEXT] = &this->editbox;
    this->editbox.caption = caption;
    this->editbox.cancel_button = WID_QS_CANCEL;
    this->editbox.ok_button = WID_QS_OK;
    this->editbox.text.afilter = afilter;
    this->flags = flags;
 
    this->InitNested(WN_QUERY_STRING);
 
    this->parent = parent;
 
    this->SetFocusedWidget(WID_QS_TEXT);
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
  {
    if (widget == WID_QS_DEFAULT && !this->flags.Test(QueryStringFlag::EnableDefault)) {
      /* We don't want this widget to show! */
      fill.width = 0;
      resize.width = 0;
      size.width = 0;
    }
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    if (widget == WID_QS_CAPTION) return GetString(this->editbox.caption);
 
    return this->Window::GetWidgetString(widget, stringid);
  }
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override {…}
 
  void OnOk()
  {
    if (!this->editbox.orig.has_value() || this->editbox.text.GetText() != this->editbox.orig) {
      assert(this->parent != nullptr);
 
      this->parent->OnQueryTextFinished(std::string{this->editbox.text.GetText()});
      this->editbox.handled = true;
    }
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_QS_DEFAULT:
        this->editbox.text.DeleteAll();
        [[fallthrough]];
 
      case WID_QS_OK:
        this->OnOk();
        [[fallthrough]];
 
      case WID_QS_CANCEL:
        this->Close();
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  void Close([[maybe_unused]] int data = 0) override
  {
    if (!this->editbox.handled && this->parent != nullptr) {
      Window *parent = this->parent;
      this->parent = nullptr; // so parent doesn't try to close us again
      parent->OnQueryTextFinished(std::nullopt);
    }
    this->Window::Close();
  }
  void Close([[maybe_unused]] int data = 0) override {…}
};
struct QueryStringWindow : public Window {…};
 
static constexpr NWidgetPart _nested_query_string_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY, WID_QS_CAPTION), SetTextStyle(TC_WHITE),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY),
    NWidget(WWT_EDITBOX, COLOUR_GREY, WID_QS_TEXT), SetMinimalSize(256, 0), SetFill(1, 0), SetPadding(2, 2, 2, 2),
  EndContainer(),
  NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_DEFAULT), SetMinimalSize(87, 12), SetFill(1, 1), SetStringTip(STR_BUTTON_DEFAULT),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_CANCEL), SetMinimalSize(86, 12), SetFill(1, 1), SetStringTip(STR_BUTTON_CANCEL),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_OK), SetMinimalSize(87, 12), SetFill(1, 1), SetStringTip(STR_BUTTON_OK),
  EndContainer(),
};
 
static WindowDesc _query_string_desc(
  WDP_CENTER, {}, 0, 0,
  WC_QUERY_STRING, WC_NONE,
  {},
  _nested_query_string_widgets
);
 
void ShowQueryString(std::string_view str, StringID caption, uint maxsize, Window *parent, CharSetFilter afilter, QueryStringFlags flags)
{
  assert(parent != nullptr);
 
  CloseWindowByClass(WC_QUERY_STRING);
  new QueryStringWindow(str, caption, (flags.Test(QueryStringFlag::LengthIsInChars) ? MAX_CHAR_LENGTH : 1) * maxsize, maxsize, _query_string_desc, parent, afilter, flags);
}
void ShowQueryString(std::string_view str, StringID caption, uint maxsize, Window *parent, CharSetFilter afilter, QueryStringFlags flags) {…}
 
struct QueryWindow : public Window {
  QueryCallbackProc *proc = nullptr; 
  EncodedString caption{}; 
  EncodedString message{}; 
 
  QueryWindow(WindowDesc &desc, EncodedString &&caption, EncodedString &&message, Window *parent, QueryCallbackProc *callback)
    : Window(desc), proc(callback), caption(std::move(caption)), message(std::move(message))
  {
    this->parent = parent;
 
    this->CreateNestedTree();
    this->FinishInitNested(WN_CONFIRM_POPUP_QUERY);
  }
 
  void Close([[maybe_unused]] int data = 0) override
  {
    if (this->proc != nullptr) this->proc(this->parent, false);
    this->Window::Close();
  }
  void Close([[maybe_unused]] int data = 0) override {…}
 
  void FindWindowPlacementAndResize(int, int, bool) override
  {
    /* Position query window over the calling window, ensuring it's within screen bounds. */
    this->left = SoftClamp(parent->left + (parent->width / 2) - (this->width / 2), 0, _screen.width - this->width);
    this->top = SoftClamp(parent->top + (parent->height / 2) - (this->height / 2), 0, _screen.height - this->height);
    this->SetDirty();
  }
  void FindWindowPlacementAndResize(int, int, bool) override {…}
 
  std::string GetWidgetString(WidgetID widget, StringID stringid) const override
  {
    switch (widget) {
      case WID_Q_CAPTION:
        return this->caption.GetDecodedString();
 
      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
  {
    if (widget != WID_Q_TEXT) return;
 
    size = GetStringMultiLineBoundingBox(this->message.GetDecodedString(), size);
  }
  void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override {…}
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_Q_TEXT) return;
 
    DrawStringMultiLine(r, this->message.GetDecodedString(), TC_FROMSTRING, SA_CENTER);
  }
  void DrawWidget(const Rect &r, WidgetID widget) const override {…}
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    switch (widget) {
      case WID_Q_YES: {
        /* in the Generate New World window, clicking 'Yes' causes
         * CloseNonVitalWindows() to be called - we shouldn't be in a window then */
        QueryCallbackProc *proc = this->proc;
        Window *parent = this->parent;
        /* Prevent the destructor calling the callback function */
        this->proc = nullptr;
        this->Close();
        if (proc != nullptr) {
          proc(parent, true);
          proc = nullptr;
        }
        break;
      }
      case WID_Q_NO:
        this->Close();
        break;
    }
  }
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override {…}
 
  EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
  {
    /* ESC closes the window, Enter confirms the action */
    switch (keycode) {
      case WKC_RETURN:
      case WKC_NUM_ENTER:
        if (this->proc != nullptr) {
          this->proc(this->parent, true);
          this->proc = nullptr;
        }
        [[fallthrough]];
 
      case WKC_ESC:
        this->Close();
        return ES_HANDLED;
    }
    return ES_NOT_HANDLED;
  }
  EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override {…}
};
struct QueryWindow : public Window {…};
 
static constexpr NWidgetPart _nested_query_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_RED),
    NWidget(WWT_CAPTION, COLOUR_RED, WID_Q_CAPTION),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_RED),
    NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.modalpopup),
      NWidget(WWT_TEXT, INVALID_COLOUR, WID_Q_TEXT), SetMinimalSize(200, 12),
      NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize), SetPIP(WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.hsep_indent, WidgetDimensions::unscaled.hsep_indent),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_Q_NO), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_QUIT_NO),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_Q_YES), SetMinimalSize(71, 12), SetFill(1, 1), SetStringTip(STR_QUIT_YES),
      EndContainer(),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _query_desc(
  WDP_CENTER, {}, 0, 0,
  WC_CONFIRM_POPUP_QUERY, WC_NONE,
  WindowDefaultFlag::Modal,
  _nested_query_widgets
);
 
void ShowQuery(EncodedString &&caption, EncodedString &&message, Window *parent, QueryCallbackProc *callback, bool focus)
{
  if (parent == nullptr) parent = GetMainWindow();
 
  for (Window *w : Window::Iterate()) {
    if (w->window_class != WC_CONFIRM_POPUP_QUERY) continue;
 
    QueryWindow *qw = dynamic_cast<QueryWindow *>(w);
    assert(qw != nullptr);
    if (qw->parent != parent || qw->proc != callback) continue;
 
    qw->Close();
    break;
  }
 
  QueryWindow *q = new QueryWindow(_query_desc, std::move(caption), std::move(message), parent, callback);
  if (focus) SetFocusedWindow(q);
}
void ShowQuery(EncodedString &&caption, EncodedString &&message, Window *parent, QueryCallbackProc *callback, bool focus) {…}