Add: Show house information in house placer.

[openttd-github.git] / src / misc_gui.cpp

/*
 * 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/>.
 */

/** @file misc_gui.cpp GUIs for a number of misc windows. */

#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 <sstream>
#include <iomanip>

#include "safeguards.h"

/** Method to open the OSK. */
enum OskActivation {
        OSKA_DISABLED,           ///< The OSK shall not be activated at all.
        OSKA_DOUBLE_CLICK,       ///< Double click on the edit box opens OSK.
        OSKA_SINGLE_CLICK,       ///< Single click after focus click opens OSK.
        OSKA_IMMEDIATELY,        ///< Focusing click already opens OSK.
};


static constexpr NWidgetPart _nested_land_info_widgets[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_GREY),
                NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_LAND_AREA_INFORMATION_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
                NWidget(WWT_PUSHIMGBTN, COLOUR_GREY, WID_LI_LOCATION), SetAspect(WidgetDimensions::ASPECT_LOCATION), SetDataTip(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, nullptr, 0, 0,
        WC_LAND_INFO, WC_NONE,
        0,
        _nested_land_info_widgets
);

class LandInfoWindow : public Window {
        StringList  landinfo_data;    ///< Info lines to show.
        std::string cargo_acceptance; ///< Centered multi-line string for cargo acceptance.

public:
        TileIndex 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()) {
                        SetDParamStr(0, this->cargo_acceptance);
                        DrawStringMultiLine(ir, STR_JUST_RAW_STRING, TC_FROMSTRING, SA_CENTER);
                }
        }

        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));
                        SetDParamStr(0, cargo_acceptance);
                        size.height += GetStringHeight(STR_JUST_RAW_STRING, size.width - WidgetDimensions::scaled.frametext.Horizontal());
                }
        }

        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);

                /* Because build_date is not set yet in every TileDesc, we make sure it is empty */
                TileDesc td;

                td.build_date = CalendarTime::INVALID_DATE;

                /* Most tiles have only one owner, but
                 *  - drivethrough roadstops can be build on town owned roads (up to 2 owners) and
                 *  - roads can have up to four owners (railroad, road, tram, 3rd-roadtype "highway").
                 */
                td.owner_type[0] = STR_LAND_AREA_INFORMATION_OWNER; // At least one owner is displayed, though it might be "N/A".
                td.owner_type[1] = STR_NULL;       // STR_NULL results in skipping the owner
                td.owner_type[2] = STR_NULL;
                td.owner_type[3] = STR_NULL;
                td.owner[0] = OWNER_NONE;
                td.owner[1] = OWNER_NONE;
                td.owner[2] = OWNER_NONE;
                td.owner[3] = OWNER_NONE;

                td.station_class = STR_NULL;
                td.station_name = STR_NULL;
                td.airport_class = STR_NULL;
                td.airport_name = STR_NULL;
                td.airport_tile_name = STR_NULL;
                td.railtype = STR_NULL;
                td.rail_speed = 0;
                td.roadtype = STR_NULL;
                td.road_speed = 0;
                td.tramtype = STR_NULL;
                td.tram_speed = 0;

                td.grf = nullptr;

                CargoArray acceptance{};
                AddAcceptedCargo(tile, acceptance, nullptr);
                GetTileDesc(tile, &td);

                this->landinfo_data.clear();

                /* Tiletype */
                SetDParam(0, td.dparam);
                this->landinfo_data.push_back(GetString(td.str));

                /* Up to four owners */
                for (uint i = 0; i < 4; i++) {
                        if (td.owner_type[i] == STR_NULL) continue;

                        SetDParam(0, STR_LAND_AREA_INFORMATION_OWNER_N_A);
                        if (td.owner[i] != OWNER_NONE && td.owner[i] != OWNER_WATER) SetDParamsForOwnedBy(td.owner[i], tile);
                        this->landinfo_data.push_back(GetString(td.owner_type[i]));
                }

                /* Cost to clear/revenue when cleared */
                StringID str = STR_LAND_AREA_INFORMATION_COST_TO_CLEAR_N_A;
                Company *c = Company::GetIfValid(_local_company);
                if (c != nullptr) {
                        assert(_current_company == _local_company);
                        CommandCost costclear = Command<CMD_LANDSCAPE_CLEAR>::Do(DC_QUERY_COST, tile);
                        if (costclear.Succeeded()) {
                                Money cost = costclear.GetCost();
                                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;
                                }
                                SetDParam(0, cost);
                        }
                }
                this->landinfo_data.push_back(GetString(str));

                /* Location */
                SetDParam(0, TileX(tile));
                SetDParam(1, TileY(tile));
                SetDParam(2, GetTileZ(tile));
                this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LANDINFO_COORDS));

                /* Tile index */
                SetDParam(0, tile);
                SetDParam(1, tile);
                this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LANDINFO_INDEX));

                /* Local authority */
                SetDParam(0, STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY_NONE);
                if (t != nullptr) {
                        SetDParam(0, STR_TOWN_NAME);
                        SetDParam(1, t->index);
                }
                this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_LOCAL_AUTHORITY));

                /* Build date */
                if (td.build_date != CalendarTime::INVALID_DATE) {
                        SetDParam(0, td.build_date);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_BUILD_DATE));
                }

                /* Station class */
                if (td.station_class != STR_NULL) {
                        SetDParam(0, td.station_class);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_STATION_CLASS));
                }

                /* Station type name */
                if (td.station_name != STR_NULL) {
                        SetDParam(0, td.station_name);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_STATION_TYPE));
                }

                /* Airport class */
                if (td.airport_class != STR_NULL) {
                        SetDParam(0, td.airport_class);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORT_CLASS));
                }

                /* Airport name */
                if (td.airport_name != STR_NULL) {
                        SetDParam(0, td.airport_name);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORT_NAME));
                }

                /* Airport tile name */
                if (td.airport_tile_name != STR_NULL) {
                        SetDParam(0, td.airport_tile_name);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_AIRPORTTILE_NAME));
                }

                /* Rail type name */
                if (td.railtype != STR_NULL) {
                        SetDParam(0, td.railtype);
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_RAIL_TYPE));
                }

                /* Rail speed limit */
                if (td.rail_speed != 0) {
                        SetDParam(0, PackVelocity(td.rail_speed, VEH_TRAIN));
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_RAIL_SPEED_LIMIT));
                }

                /* Road type name */
                if (td.roadtype != STR_NULL) {
                        SetDParam(0, td.roadtype);
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_ROAD_TYPE));
                }

                /* Road speed limit */
                if (td.road_speed != 0) {
                        SetDParam(0, PackVelocity(td.road_speed, VEH_ROAD));
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_ROAD_SPEED_LIMIT));
                }

                /* Tram type name */
                if (td.tramtype != STR_NULL) {
                        SetDParam(0, td.tramtype);
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_TRAM_TYPE));
                }

                /* Tram speed limit */
                if (td.tram_speed != 0) {
                        SetDParam(0, PackVelocity(td.tram_speed, VEH_ROAD));
                        this->landinfo_data.push_back(GetString(STR_LANG_AREA_INFORMATION_TRAM_SPEED_LIMIT));
                }

                /* NewGRF name */
                if (td.grf != nullptr) {
                        SetDParamStr(0, td.grf);
                        this->landinfo_data.push_back(GetString(STR_LAND_AREA_INFORMATION_NEWGRF_NAME));
                }

                /* 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();
                }
        }

        bool IsNewGRFInspectable() const override
        {
                return ::IsNewGRFInspectable(GetGrfSpecFeature(this->tile), this->tile.base());
        }

        void ShowNewGRFInspectWindow() const override
        {
                ::ShowNewGRFInspectWindow(GetGrfSpecFeature(this->tile), this->tile.base());
        }

        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;
                }
        }

        /**
         * Some data on this window has become invalid.
         * @param data Information about the changed data.
         * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
         */
        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();
        }
};

/**
 * Show land information window.
 * @param tile The tile to show information about.
 */
void ShowLandInfo(TileIndex tile)
{
        CloseWindowById(WC_LAND_INFO, 0);
        new LandInfoWindow(tile);
}

static constexpr NWidgetPart _nested_about_widgets[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_GREY),
                NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_ABOUT_OPENTTD, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
        EndContainer(),
        NWidget(WWT_PANEL, COLOUR_GREY), SetPIP(4, 2, 4),
                NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_ABOUT_ORIGINAL_COPYRIGHT, STR_NULL),
                NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_ABOUT_VERSION, STR_NULL),
                NWidget(WWT_FRAME, COLOUR_GREY), SetPadding(0, 5, 1, 5),
                        NWidget(WWT_EMPTY, INVALID_COLOUR, WID_A_SCROLLING_TEXT),
                EndContainer(),
                NWidget(WWT_LABEL, COLOUR_GREY, WID_A_WEBSITE), SetDataTip(STR_JUST_RAW_STRING, STR_NULL),
                NWidget(WWT_LABEL, COLOUR_GREY, WID_A_COPYRIGHT), SetDataTip(STR_ABOUT_COPYRIGHT_OPENTTD, STR_NULL),
        EndContainer(),
};

static WindowDesc _about_desc(
        WDP_CENTER, nullptr, 0, 0,
        WC_GAME_OPTIONS, WC_NONE,
        0,
        _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)",
        "",
        "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;                       ///< The top of the scrolling text
        int line_height;                         ///< The height of a single line
        static const int num_visible_lines = 19; ///< The number of lines visible simultaneously

        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;
        }

        void SetStringParameters(WidgetID widget) const override
        {
                if (widget == WID_A_WEBSITE) SetDParamStr(0, "Website: https://www.openttd.org");
                if (widget == WID_A_COPYRIGHT) SetDParamStr(0, _openttd_revision_year);
        }

        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 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;
                }
        }

        /**
         * Scroll the text in the about window slow.
         *
         * The interval of 2100ms is chosen to maintain parity: 2100 / GetCharacterHeight(FS_NORMAL) = 150ms.
         */
        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);
        }};
};

void ShowAboutWindow()
{
        CloseWindowByClass(WC_GAME_OPTIONS);
        new AboutWindow();
}

/**
 * Display estimated costs.
 * @param cost Estimated cost (or income if negative).
 * @param x    X position of the notification window.
 * @param y    Y position of the notification window.
 */
void ShowEstimatedCostOrIncome(Money cost, int x, int y)
{
        StringID msg = STR_MESSAGE_ESTIMATED_COST;

        if (cost < 0) {
                cost = -cost;
                msg = STR_MESSAGE_ESTIMATED_INCOME;
        }
        SetDParam(0, cost);
        ShowErrorMessage(msg, INVALID_STRING_ID, WL_INFO, x, y);
}

/**
 * Display animated income or costs on the map. Does nothing if cost is zero.
 * @param x    World X position of the animation location.
 * @param y    World Y position of the animation location.
 * @param z    World Z position of the animation location.
 * @param cost Estimated cost (or income if negative).
 */
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;
        }
        SetDParam(0, cost);
        AddTextEffect(msg, pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
}

/**
 * Display animated feeder income.
 * @param x        World X position of the animation location.
 * @param y        World Y position of the animation location.
 * @param z        World Z position of the animation location.
 * @param transfer Estimated feeder income.
 * @param income   Real income from goods being delivered to their final destination.
 */
void ShowFeederIncomeAnimation(int x, int y, int z, Money transfer, Money income)
{
        Point pt = RemapCoords(x, y, z);

        SetDParam(0, transfer);
        if (income == 0) {
                AddTextEffect(STR_FEEDER, pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
        } else {
                StringID msg = STR_FEEDER_COST;
                if (income < 0) {
                        income = -income;
                        msg = STR_FEEDER_INCOME;
                }
                SetDParam(1, income);
                AddTextEffect(msg, pt.x, pt.y, Ticks::DAY_TICKS, TE_RISING);
        }
}

/**
 * Display vehicle loading indicators.
 * @param x       World X position of the animation location.
 * @param y       World Y position of the animation location.
 * @param z       World Z position of the animation location.
 * @param percent Estimated feeder income.
 * @param string  String which is drawn on the map.
 * @return        TextEffectID to be used for future updates of the loading indicators.
 */
TextEffectID ShowFillingPercent(int x, int y, int z, uint8_t percent, StringID string)
{
        Point pt = RemapCoords(x, y, z);

        assert(string != STR_NULL);

        SetDParam(0, percent);
        return AddTextEffect(string, pt.x, pt.y, 0, TE_STATIC);
}

/**
 * Update vehicle loading indicators.
 * @param te_id   TextEffectID to be updated.
 * @param string  String which is printed.
 */
void UpdateFillingPercent(TextEffectID te_id, uint8_t percent, StringID string)
{
        assert(string != STR_NULL);

        SetDParam(0, percent);
        UpdateTextEffect(te_id, string);
}

/**
 * Hide vehicle loading indicators.
 * @param *te_id TextEffectID which is supposed to be hidden.
 */
void HideFillingPercent(TextEffectID *te_id)
{
        if (*te_id == INVALID_TE_ID) return;

        RemoveTextEffect(*te_id);
        *te_id = INVALID_TE_ID;
}

static constexpr NWidgetPart _nested_tooltips_widgets[] = {
        NWidget(WWT_EMPTY, INVALID_COLOUR, WID_TT_BACKGROUND),
};

static WindowDesc _tool_tips_desc(
        WDP_MANUAL, nullptr, 0, 0, // Coordinates and sizes are not used,
        WC_TOOLTIPS, WC_NONE,
        WDF_NO_FOCUS | WDF_NO_CLOSE,
        _nested_tooltips_widgets
);

/** Window for displaying a tooltip. */
struct TooltipsWindow : public Window
{
        StringID string_id;               ///< String to display as tooltip.
        std::vector<StringParameterData> params; ///< The string parameters.
        TooltipCloseCondition close_cond; ///< Condition for closing the window.

        TooltipsWindow(Window *parent, StringID str, uint paramcount, TooltipCloseCondition close_tooltip) : Window(_tool_tips_desc)
        {
                this->parent = parent;
                this->string_id = str;
                CopyOutDParam(this->params, paramcount);
                this->close_cond = close_tooltip;

                this->InitNested();

                CLRBITS(this->flags, WF_WHITE_BORDER);
        }

        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;
        }

        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;
                CopyInDParam(this->params);

                size.width  = std::min<uint>(GetStringBoundingBox(this->string_id).width, ScaleGUITrad(194));
                size.height = GetStringHeight(this->string_id, 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 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);

                CopyInDParam(this->params);
                DrawStringMultiLine(r.Shrink(WidgetDimensions::scaled.framerect).Shrink(WidgetDimensions::scaled.fullbevel), this->string_id, TC_BLACK, SA_CENTER);
        }

        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;
                        }
                }
        }
};

/**
 * Shows a tooltip
 * @param parent The window this tooltip is related to.
 * @param str String to be displayed
 * @param close_tooltip the condition under which the tooltip closes
 * @param paramcount number of params to deal with
 */
void GuiShowTooltips(Window *parent, StringID str, TooltipCloseCondition close_tooltip, uint paramcount)
{
        CloseWindowById(WC_TOOLTIPS, 0);

        if (str == STR_NULL || !_cursor.in_window) return;

        new TooltipsWindow(parent, str, paramcount, 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, '_');
}

/**
 * Reposition edit text box rect based on textbuf length can caret position.
 * @param r Initial rect of edit text box.
 * @param tb The Textbuf being processed.
 * @return Updated rect.
 */
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);
}

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() ? FR_LOWERED : FR_NONE);
        DrawSpriteIgnorePadding(rtl ? SPR_IMG_DELETE_RIGHT : SPR_IMG_DELETE_LEFT, PAL_NONE, cr, SA_CENTER);
        if (this->text.bytes == 1) GfxFillRect(cr.Shrink(WidgetDimensions::scaled.bevel), GetColourGradient(wi->colour, SHADE_DARKER), FILLRECT_CHECKER);

        DrawFrameRect(fr, wi->colour, FR_LOWERED | FR_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, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), tb->buf, 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, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
                } else {
                        DrawString(fr.left + tb->caretxoffs, fr.left + tb->caretxoffs + caret_width, CenterBounds(fr.top, fr.bottom, GetCharacterHeight(FS_NORMAL)), "_", TC_WHITE);
                }
        }
}

/**
 * Get the current caret position.
 * @param w Window the edit box is in.
 * @param wid Widget index.
 * @return Top-left location of the caret, relative to the window.
 */
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;
}

/**
 * Get the bounding rectangle for a range of the query string.
 * @param w Window the edit box is in.
 * @param wid Widget index.
 * @param from Start of the string range.
 * @param to End of the string range.
 * @return Rectangle encompassing the string range, relative to the window.
 */
Rect QueryString::GetBoundingRect(const Window *w, WidgetID wid, const char *from, const char *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->buf, from, FS_NORMAL);
        const auto p2 = from != to ? GetCharPosInString(tb->buf, 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 };
}

/**
 * Get the character that is rendered at a position.
 * @param w Window the edit box is in.
 * @param wid Widget index.
 * @param pt Position to test.
 * @return Index of the character position or -1 if no character is at the position.
 */
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->buf, pt.x - r.left);
}

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.bytes > 1) {
                        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);
        }
}

/** Class for the string query window. */
struct QueryStringWindow : public Window
{
        QueryString editbox;    ///< Editbox.
        QueryStringFlags flags; ///< Flags controlling behaviour of the window.

        QueryStringWindow(StringID 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 & QSF_ACCEPT_UNCHANGED) == 0) this->editbox.orig = this->editbox.text.buf;

                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 & QSF_ENABLE_DEFAULT) == 0) {
                        /* We don't want this widget to show! */
                        fill.width = 0;
                        resize.width = 0;
                        size.width = 0;
                }
        }

        void SetStringParameters(WidgetID widget) const override
        {
                if (widget == WID_QS_CAPTION) SetDParam(0, this->editbox.caption);
        }

        void OnOk()
        {
                if (!this->editbox.orig.has_value() || this->editbox.text.buf != this->editbox.orig) {
                        assert(this->parent != nullptr);

                        this->parent->OnQueryTextFinished(this->editbox.text.buf);
                        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 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();
        }
};

static constexpr NWidgetPart _nested_query_string_widgets[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_GREY),
                NWidget(WWT_CAPTION, COLOUR_GREY, WID_QS_CAPTION), SetDataTip(STR_JUST_STRING, STR_NULL), 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, NC_EQUALSIZE),
                NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_DEFAULT), SetMinimalSize(87, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_DEFAULT, STR_NULL),
                NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_CANCEL), SetMinimalSize(86, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_CANCEL, STR_NULL),
                NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_QS_OK), SetMinimalSize(87, 12), SetFill(1, 1), SetDataTip(STR_BUTTON_OK, STR_NULL),
        EndContainer(),
};

static WindowDesc _query_string_desc(
        WDP_CENTER, nullptr, 0, 0,
        WC_QUERY_STRING, WC_NONE,
        0,
        _nested_query_string_widgets
);

/**
 * Show a query popup window with a textbox in it.
 * @param str StringID for the text shown in the textbox
 * @param caption StringID of text shown in caption of querywindow
 * @param maxsize maximum size in bytes or characters (including terminating '\0') depending on flags
 * @param parent pointer to a Window that will handle the events (ok/cancel) of this window.
 * @param afilter filters out unwanted character input
 * @param flags various flags, @see QueryStringFlags
 */
void ShowQueryString(StringID str, StringID caption, uint maxsize, Window *parent, CharSetFilter afilter, QueryStringFlags flags)
{
        assert(parent != nullptr);

        CloseWindowByClass(WC_QUERY_STRING);
        new QueryStringWindow(str, caption, ((flags & QSF_LEN_IN_CHARS) ? MAX_CHAR_LENGTH : 1) * maxsize, maxsize, _query_string_desc, parent, afilter, flags);
}

/**
 * Window used for asking the user a YES/NO question.
 */
struct QueryWindow : public Window {
        QueryCallbackProc *proc; ///< callback function executed on closing of popup. Window* points to parent, bool is true if 'yes' clicked, false otherwise
        std::vector<StringParameterData> params; ///< local copy of #_global_string_params
        StringID message;        ///< message shown for query window

        QueryWindow(WindowDesc &desc, StringID caption, StringID message, Window *parent, QueryCallbackProc *callback) : Window(desc)
        {
                /* Create a backup of the variadic arguments to strings because it will be
                 * overridden pretty often. We will copy these back for drawing */
                CopyOutDParam(this->params, 10);
                this->message = message;
                this->proc    = callback;
                this->parent  = parent;

                this->CreateNestedTree();
                this->GetWidget<NWidgetCore>(WID_Q_CAPTION)->SetDataTip(caption, STR_NULL);
                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 FindWindowPlacementAndResize([[maybe_unused]] int def_width, [[maybe_unused]] int def_height) 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 SetStringParameters(WidgetID widget) const override
        {
                switch (widget) {
                        case WID_Q_CAPTION:
                        case WID_Q_TEXT:
                                CopyInDParam(this->params);
                                break;
                }
        }

        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, size);
        }

        void DrawWidget(const Rect &r, WidgetID widget) const override
        {
                if (widget != WID_Q_TEXT) return;

                DrawStringMultiLine(r, this->message, TC_FROMSTRING, SA_CENTER);
        }

        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;
                }
        }

        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;
        }
};

static constexpr NWidgetPart _nested_query_widgets[] = {
        NWidget(NWID_HORIZONTAL),
                NWidget(WWT_CLOSEBOX, COLOUR_RED),
                NWidget(WWT_CAPTION, COLOUR_RED, WID_Q_CAPTION), // The caption's string is set in the constructor
        EndContainer(),
        NWidget(WWT_PANEL, COLOUR_RED),
                NWidget(NWID_VERTICAL), SetPIP(0, WidgetDimensions::unscaled.vsep_wide, 0), SetPadding(WidgetDimensions::unscaled.modalpopup),
                        NWidget(WWT_TEXT, COLOUR_RED, WID_Q_TEXT), SetMinimalSize(200, 12),
                        NWidget(NWID_HORIZONTAL, NC_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), SetDataTip(STR_QUIT_NO, STR_NULL),
                                NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_Q_YES), SetMinimalSize(71, 12), SetFill(1, 1), SetDataTip(STR_QUIT_YES, STR_NULL),
                        EndContainer(),
                EndContainer(),
        EndContainer(),
};

static WindowDesc _query_desc(
        WDP_CENTER, nullptr, 0, 0,
        WC_CONFIRM_POPUP_QUERY, WC_NONE,
        WDF_MODAL,
        _nested_query_widgets
);

/**
 * Show a confirmation window with standard 'yes' and 'no' buttons
 * The window is aligned to the centre of its parent.
 * @param caption string shown as window caption
 * @param message string that will be shown for the window
 * @param parent pointer to parent window, if this pointer is nullptr the parent becomes
 * the main window WC_MAIN_WINDOW
 * @param callback callback function pointer to set in the window descriptor
 * @param focus whether the window should be focussed (by default false)
 */
void ShowQuery(StringID caption, StringID 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);
                if (qw->parent != parent || qw->proc != callback) continue;

                qw->Close();
                break;
        }

        QueryWindow *q = new QueryWindow(_query_desc, caption, message, parent, callback);
        if (focus) SetFocusedWindow(q);
}