preferences_dialog.cpp

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/*
    Copyright (C) 2016 - 2024
    by Charles Dang <exodia339gmail.com>
    Copyright (C) 2011, 2015 by Iris Morelle <shadowm2006@gmail.com>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/
 
    This program 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; either version 2 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY.
 
    See the COPYING file for more details.
*/
 
#define GETTEXT_DOMAIN "wesnoth-lib"
 
#include "gui/dialogs/preferences_dialog.hpp"
 
#include "display.hpp"
#include "events.hpp"
#include "filesystem.hpp"
#include "formatter.hpp"
#include "formula/string_utils.hpp"
#include "game_data.hpp"
#include "gettext.hpp"
#include "gui/core/gui_definition.hpp"
#include "hotkey/hotkey_item.hpp"
#include "lexical_cast.hpp"
#include "resources.hpp"
#include "theme.hpp"
#include "video.hpp"
 
// Sub-dialog includes
#include "gui/dialogs/game_cache_options.hpp"
#include "gui/dialogs/hotkey_bind.hpp"
#include "gui/dialogs/log_settings.hpp"
#include "gui/dialogs/multiplayer/mp_alerts_options.hpp"
#include "gui/dialogs/select_orb_colors.hpp"
#include "gui/dialogs/title_screen.hpp"
 
#include "gui/auxiliary/find_widget.hpp"
#include "gui/dialogs/game_version_dialog.hpp"
#include "gui/dialogs/message.hpp"
#include "gui/dialogs/transient_message.hpp"
#include "gui/widgets/button.hpp"
#include "gui/widgets/menu_button.hpp"
#include "gui/widgets/multimenu_button.hpp"
#include "gui/widgets/grid.hpp"
#include "gui/widgets/image.hpp"
#include "gui/widgets/label.hpp"
#include "gui/widgets/listbox.hpp"
#include "gui/widgets/slider.hpp"
#include "gui/widgets/stacked_widget.hpp"
#include "gui/widgets/status_label_helper.hpp"
#include "gui/widgets/text_box.hpp"
#include "gui/widgets/toggle_button.hpp"
#include "gui/widgets/window.hpp"
 
#include <functional>
#include <numeric>
 
namespace gui2::dialogs
{
namespace
{
template<typename W>
void disable_widget_on_toggle(window& window, widget& w, const std::string& id)
{
    find_widget<W>(&window, id, false).set_active(dynamic_cast<selectable_item&>(w).get_value_bool());
}
 
template<typename W>
void disable_widget_on_toggle_inverted(window& window, widget& w, const std::string& id)
{
    find_widget<W>(&window, id, false).set_active(!dynamic_cast<selectable_item&>(w).get_value_bool());
}
 
// Ensure the specified index is between 0 and one less than the max
// number of pager layers (since get_layer_count returns one-past-end).
int index_in_pager_range(const int first, const stacked_widget& pager)
{
    return std::clamp<int>(first, 0, pager.get_layer_count() - 1);
}
 
// Helper to make it easier to immediately apply sound toggles immediately.
template<bool(*fptr)(bool)>
void sound_toggle_on_change(window& window, const std::string& id_to_toggle, widget& w)
{
    std::invoke(fptr, dynamic_cast<selectable_item&>(w).get_value_bool());
 
    // Toggle the corresponding slider.
    disable_widget_on_toggle<slider>(window, w, id_to_toggle);
}
 
// Helper to make it easier to immediately apply volume (music, etc) setings on change.
template<void(*fptr)(int)>
void volume_setter_on_change(widget& w)
{
    std::invoke(fptr, dynamic_cast<integer_selector&>(w).get_value());
}
 
} // end anon namespace
 
REGISTER_DIALOG(preferences_dialog)
 
preferences_dialog::preferences_dialog(const pref_constants::PREFERENCE_VIEW initial_view)
    : modal_dialog(window_id())
    , resolutions_() // should be populated by set_resolution_list before use
    , themes_() // populated by set_theme_list
    , gui2_themes_() // populated by set_gui2_theme_list
    , last_selected_item_(0)
    , current_gui_theme_(0)
    , accl_speeds_({0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 3, 4, 8, 16})
    , visible_hotkeys_()
    , visible_categories_()
    , initial_index_(pef_view_map[initial_view])
{
    initialize_callbacks();
}
 
// Helper function to refresh resolution list
void preferences_dialog::set_resolution_list(menu_button& res_list)
{
    resolutions_ = video::get_available_resolutions(true);
 
    std::vector<config> options;
    for(const point& res : resolutions_) {
        config option;
        option["label"] = formatter() << res.x << font::unicode_multiplication_sign << res.y;
 
        const int div = std::gcd(res.x, res.y);
        const int x_ratio = res.x / div;
        const int y_ratio = res.y / div;
 
        if(x_ratio <= 10 || y_ratio <= 10) {
            option["details"] = formatter() << "<span color='#777777'>(" << x_ratio << ':' << y_ratio << ")</span>";
        }
 
        options.push_back(std::move(option));
    }
 
    const unsigned current_res = std::distance(resolutions_.begin(), std::find(
        resolutions_.begin(), resolutions_.end(), video::current_resolution()));
 
    res_list.set_values(options, current_res);
}
 
void preferences_dialog::set_theme_list(menu_button& theme_list)
{
    themes_ = theme::get_basic_theme_info();
 
    std::vector<config> options;
    std::size_t current_theme = 0;
    for(std::size_t i = 0; i < themes_.size(); ++i) {
        options.emplace_back("label", themes_[i].name, "tooltip", themes_[i].description);
        if(themes_[i].id == prefs::get().theme()) {
            current_theme = i;
        }
    }
 
    theme_list.set_values(options, current_theme);
}
 
void preferences_dialog::set_gui2_theme_list(menu_button& theme_list)
{
    std::string current_gui_theme_name = prefs::get().gui2_theme();
 
    std::vector<config> options;
    bool theme_found = false;
    unsigned i = 0;
    for(auto& gui : guis) {
        gui2_themes_.emplace_back(gui.first);
        options.emplace_back("label", gui.second.description());
        if (current_gui_theme_name == gui.first) {
            current_gui_theme_ = i;
            theme_found = true;
        }
        if (!theme_found) {
            i++;
        }
    }
 
    theme_list.set_values(options);
    theme_list.set_selected(current_gui_theme_);
}
 
widget_data preferences_dialog::get_friends_list_row_data(const preferences::acquaintance& entry)
{
    widget_data data;
    widget_item item;
 
    std::string image = "friend.png";
    std::string descriptor = _("friend");
    std::string notes;
 
    if(entry.get_status() == "ignore") {
        image = "ignore.png";
        descriptor = _("ignored");
    }
 
    if(!entry.get_notes().empty()) {
        notes = " <small>(" + entry.get_notes() + ")</small>";
    }
 
    item["use_markup"] = "true";
 
    item["label"] = "misc/status-" + image;
    data.emplace("friend_icon", item);
 
    item["label"] = entry.get_nick() + notes;
    data.emplace("friend_name", item);
 
    item["label"] = "<small>" + descriptor + "</small>";
    data.emplace("friend_status", item);
 
    return data;
}
 
void preferences_dialog::on_friends_list_select(listbox& list, text_box& textbox)
{
    const int num_friends = prefs::get().get_acquaintances().size();
    const int sel = list.get_selected_row();
 
    if(sel < 0 || sel >= num_friends) {
        return;
    }
 
    std::map<std::string, preferences::acquaintance>::const_iterator who = prefs::get().get_acquaintances().begin();
    std::advance(who, sel);
 
    textbox.set_value(who->second.get_nick() + " " + who->second.get_notes());
}
 
void preferences_dialog::update_friends_list_controls(listbox& list)
{
    const bool list_empty = list.get_item_count() == 0;
 
    if(!list_empty) {
        list.select_row(std::min(static_cast<int>(list.get_item_count()) - 1, list.get_selected_row()));
    }
 
    find_widget<button>(this, "remove", false).set_active(!list_empty);
 
    find_widget<label>(this, "no_friends_notice", false).set_visible(
        list_empty ? widget::visibility::visible : widget::visibility::invisible);
}
 
void preferences_dialog::add_friend_list_entry(const bool is_friend, text_box& textbox)
{
    std::string username = textbox.text();
    if(username.empty()) {
        gui2::show_transient_message("", _("No username specified"));
        return;
    }
 
    std::string reason;
 
    std::size_t pos = username.find_first_of(' ');
    if(pos != std::string::npos) {
        reason = username.substr(pos + 1);
        username = username.substr(0, pos);
    }
 
    auto [entry, added_new] = prefs::get().add_acquaintance(username, (is_friend ? "friend": "ignore"), reason);
 
    if(!entry) {
        gui2::show_transient_message(_("Error"), _("Invalid username"));
        return;
    }
 
    textbox.clear();
 
    listbox& list = find_widget<listbox>(this, "friends_list", false);
 
    //
    // If this is a new entry, just add a new row. If it's not, we find the relevant
    // row, remove it, and add a new row with the updated data. Should probably come
    // up with a more elegant way to do this... the only reason I'm using the remove
    // -and-replace method is to prevent any issues with the widgets' layout sizes.
    //
    if(added_new) {
        list.add_row(get_friends_list_row_data(*entry));
    } else {
        for(unsigned i = 0; i < list.get_item_count(); ++i) {
            grid* row_grid = list.get_row_grid(i);
 
            if(find_widget<label>(row_grid, "friend_name", false).get_label() == entry->get_nick()) {
                list.remove_row(i);
                list.add_row(get_friends_list_row_data(*entry), i);
 
                break;
            }
        }
    }
 
    update_friends_list_controls(list);
}
 
void preferences_dialog::remove_friend_list_entry(listbox& friends_list, text_box& textbox)
{
    const int selected_row = std::max(0, friends_list.get_selected_row());
 
    std::map<std::string, preferences::acquaintance>::const_iterator who = prefs::get().get_acquaintances().begin();
    std::advance(who, selected_row);
 
    const std::string to_remove = !textbox.text().empty() ? textbox.text() : who->second.get_nick();
 
    if(to_remove.empty()) {
        gui2::show_transient_message("", _("No username specified"));
        return;
    }
 
    if(!prefs::get().remove_acquaintance(to_remove)) {
        gui2::show_transient_error_message(_("Not on friends or ignore lists"));
        return;
    }
 
    textbox.clear();
 
    listbox& list = find_widget<listbox>(this, "friends_list", false);
    list.remove_row(selected_row);
 
    update_friends_list_controls(list);
}
 
void preferences_dialog::apply_pixel_scale()
{
    // Update pixel scale preference.
    slider& ps_slider = find_widget<slider>(this, "pixel_scale_slider", false);
    prefs::get().set_pixel_scale(ps_slider.get_value());
 
    // Update auto pixel scale preference.
    toggle_button& auto_ps_toggle =
        find_widget<toggle_button>(this, "auto_pixel_scale", false);
    prefs::get().set_auto_pixel_scale(auto_ps_toggle.get_value_bool());
 
    // Update draw buffers, taking these into account.
    video::update_buffers();
 
    // Update game display, if active
    if(::display* disp = display::get_singleton()) {
        disp->queue_rerender();
    }
 
    // Raise a window resize event so we can react to the change
    events::raise_resize_event();
}
 
template<bool(*toggle_getter)(), bool(*toggle_setter)(bool), int(*vol_getter)(), void(*vol_setter)(int)>
void preferences_dialog::initialize_sound_option_group(const std::string& id_suffix)
{
    const std::string toggle_widget_id = "sound_toggle_" + id_suffix;
    const std::string volume_widget_id = "sound_volume_" + id_suffix;
 
    // Set up the toggle. We utilize field_bool's callback-on-changed mechanism instead
    // of manually registering the callback. Since we want the effects to apply immediately,
    // the callback the setter callback is duplicated in the on-change callback. The field
    // class could possibly use some reworking to make this less redundant, but for now it
    // works well enough.
    register_bool(toggle_widget_id, true, toggle_getter, std::bind(toggle_setter, std::placeholders::_1),
        std::bind(sound_toggle_on_change<toggle_setter>, std::ref(*this), volume_widget_id, std::placeholders::_1), true);
 
    // Set up the volume slider. integer_field doesn't have a callback-on-changed mechanism.
    // To add one would either mean adding it to the base field class or make it a proper
    // class of is own.
    register_integer(volume_widget_id, true, vol_getter, vol_setter);
 
    // Callback to actually immediately apply the volume effect.
    connect_signal_notify_modified(find_widget<slider>(this, volume_widget_id, false),
        std::bind(volume_setter_on_change<vol_setter>, std::placeholders::_1));
}
 
/* SOUND FX wrappers for template */
static bool sound(){return prefs::get().sound();}
static bool set_sound(bool v){return prefs::get().set_sound(v);}
static int sound_volume(){return prefs::get().sound_volume();}
static void set_sound_volume(int v){prefs::get().set_sound_volume(v);}
 
/* MUSIC wrappers for template */
static bool music_on(){return prefs::get().music_on();}
static bool set_music(bool v){return prefs::get().set_music(v);}
static int music_volume(){return prefs::get().music_volume();}
static void set_music_volume(int v){prefs::get().set_music_volume(v);}
 
/* TURN BELL wrappers for template */
static bool turn_bell(){return prefs::get().turn_bell();}
static bool set_turn_bell(bool v){return prefs::get().set_turn_bell(v);}
static int bell_volume(){return prefs::get().bell_volume();}
static void set_bell_volume(int v){prefs::get().set_bell_volume(v);}
 
/* UI FX wrappers for template */
static bool ui_sound_on(){return prefs::get().ui_sound_on();}
static bool set_ui_sound(bool v){return prefs::get().set_ui_sound(v);}
static int ui_volume(){return prefs::get().ui_volume();}
static void set_ui_volume(int v){prefs::get().set_ui_volume(v);}
 
/**
 * Sets up states and callbacks for each of the widgets
 */
void preferences_dialog::initialize_callbacks()
{
    //
    // GENERAL PANEL
    //
 
    /* SCROLL SPEED */
    register_integer("scroll_speed", true,
        []() {return prefs::get().scroll_speed();},
        [](int v) {prefs::get().set_scroll_speed(v);});
 
    /* ACCELERATED SPEED */
    register_bool("turbo_toggle", true,
        []() {return prefs::get().turbo();},
        [](bool v) {prefs::get().set_turbo(v);});
 
    const auto accl_load = [this]()->int {
        return std::distance(accl_speeds_.begin(), std::find(accl_speeds_.begin(), accl_speeds_.end(), prefs::get().turbo_speed()));
    };
 
    const auto accl_save = [this](int i) {
        prefs::get().set_turbo_speed(accl_speeds_[i]);
    };
 
    register_integer("turbo_slider", true,
        accl_load, accl_save);
 
    // Set the value label transform function.
    find_widget<slider>(this, "turbo_slider", false).set_value_labels(
        [this](int pos, int /*max*/)->t_string { return lexical_cast<std::string>(accl_speeds_[pos]); }
    );
 
    /* SKIP AI MOVES */
    register_bool("skip_ai_moves", true,
        []() {return prefs::get().skip_ai_moves();},
        [](bool v) {prefs::get().set_skip_ai_moves(v);});
 
    /* DISABLE AUTO MOVES */
    register_bool("disable_auto_moves", true,
        []() {return prefs::get().disable_auto_moves();},
        [](bool v) {prefs::get().set_disable_auto_moves(v);});
 
    /* TURN DIALOG */
    register_bool("show_turn_dialog", true,
        []() {return prefs::get().turn_dialog();},
        [](bool v) {prefs::get().set_turn_dialog(v);});
 
    /* ENABLE PLANNING MODE */
    register_bool("whiteboard_on_start", true,
        []() {return prefs::get().enable_planning_mode_on_start();},
        [](bool v) {prefs::get().set_enable_planning_mode_on_start(v);});
 
    /* HIDE ALLY PLANS */
    register_bool("whiteboard_hide_allies", true,
        []() {return prefs::get().hide_whiteboard();},
        [](bool v) {prefs::get().set_hide_whiteboard(v);});
 
    /* INTERRUPT ON SIGHTING */
    register_bool("interrupt_move_when_ally_sighted", true,
        []() {return prefs::get().ally_sighted_interrupts();},
        [](bool v) {prefs::get().set_ally_sighted_interrupts(v);});
 
    /* SAVE REPLAYS */
    register_bool("save_replays", true,
        []() {return prefs::get().save_replays();},
        [](bool v) {prefs::get().set_save_replays(v);});
 
    /* DELETE AUTOSAVES */
    register_bool("delete_saves", true,
        []() {return prefs::get().delete_saves();},
        [](bool v) {prefs::get().set_delete_saves(v);});
 
    /* MAX AUTO SAVES */
    register_integer("max_saves_slider", true,
        []() {return prefs::get().auto_save_max();},
        [](int v) {prefs::get().set_auto_save_max(v);});
 
    /* CACHE MANAGE */
    connect_signal_mouse_left_click(find_widget<button>(this, "cachemg", false),
            std::bind(&gui2::dialogs::game_cache_options::display<>));
 
    //
    // DISPLAY PANEL
    //
 
    /* FULLSCREEN TOGGLE */
    toggle_button& toggle_fullscreen =
            find_widget<toggle_button>(this, "fullscreen", false);
 
    toggle_fullscreen.set_value(prefs::get().fullscreen());
 
    // We bind a special callback function, so setup_single_toggle() is not used
    connect_signal_mouse_left_click(toggle_fullscreen, std::bind(
            &preferences_dialog::fullscreen_toggle_callback, this));
 
    /* SET RESOLUTION */
    menu_button& res_list = find_widget<menu_button>(this, "resolution_set", false);
 
    res_list.set_use_markup(true);
    res_list.set_active(!prefs::get().fullscreen());
 
    set_resolution_list(res_list);
 
    connect_signal_notify_modified(res_list,
        std::bind(&preferences_dialog::handle_res_select, this));
 
    connect_signal<event::SDL_VIDEO_RESIZE>(std::bind(&preferences_dialog::set_resolution_list, this, std::ref(res_list)));
 
    /* PIXEL SCALE */
    register_integer("pixel_scale_slider", true,
        []() {return prefs::get().pixel_scale();},
        [](int v) {prefs::get().set_pixel_scale(v);});
 
    slider& ps_slider =
        find_widget<slider>(this, "pixel_scale_slider", false);
    connect_signal_mouse_left_release(ps_slider,
        std::bind(&preferences_dialog::apply_pixel_scale, this));
 
    /* AUTOMATIC PIXEL SCALE */
    register_bool("auto_pixel_scale", true,
        []() {return prefs::get().auto_pixel_scale();},
        [](bool v) {prefs::get().set_auto_pixel_scale(v);},
        [&](widget& w) { disable_widget_on_toggle_inverted<slider>(*this, w, "pixel_scale_slider"); }, true);
 
    toggle_button& auto_ps_toggle =
        find_widget<toggle_button>(this, "auto_pixel_scale", false);
    connect_signal_mouse_left_click(auto_ps_toggle,
        std::bind(&preferences_dialog::apply_pixel_scale, this));
 
    /* SHOW FLOATING LABELS */
    register_bool("show_floating_labels", true,
        []() {return prefs::get().floating_labels();},
        [](bool v) {prefs::get().set_floating_labels(v);});
 
    /* SHOW TEAM COLORS */
    register_bool("show_ellipses", true,
        []() {return prefs::get().show_side_colors();},
        [](bool v) {prefs::get().set_show_side_colors(v);});
 
    /* SHOW GRID */
    register_bool("show_grid", true,
        []() {return prefs::get().grid();},
        [](bool v) {prefs::get().set_grid(v);});
 
    /* ANIMATE MAP */
    register_bool("animate_terrains", true,
        []() {return prefs::get().animate_map();},
        [](bool v) {prefs::get().set_animate_map(v);},
        [&](widget& w) { disable_widget_on_toggle<toggle_button>(*this, w, "animate_water"); }, true);
 
    /* ANIMATE WATER */
    register_bool("animate_water", true,
        []() {return prefs::get().animate_water();},
        [](bool v) {prefs::get().set_animate_water(v);});
 
    /* SHOW UNIT STANDING ANIMS */
    register_bool("animate_units_standing", true,
        []() {return prefs::get().show_standing_animations();},
        [](bool v) {prefs::get().set_show_standing_animations(v);});
 
    /* SHOW UNIT IDLE ANIMS */
    register_bool("animate_units_idle", true,
        []() {return prefs::get().idle_anim();},
        [](bool v) {prefs::get().set_idle_anim(v);},
        [&](widget& w) { disable_widget_on_toggle<slider>(*this, w, "idle_anim_frequency"); }, true);
 
    register_integer("idle_anim_frequency", true,
        []() {return prefs::get().idle_anim_rate();},
        [](int v) {prefs::get().set_idle_anim_rate(v);});
 
    /* FONT SCALING */
    //register_integer("scaling_slider", true,
    //  font_scaling, set_font_scaling);
 
    /* FPS LIMITER */
    register_bool("fps_limiter", true,
        []() { return prefs::get().draw_delay() != 0; }, [](bool v) { prefs::get().set_draw_delay(v ? -1 : 0); });
 
    /* VSYNC */
    register_bool("vsync", true,
        []() {return prefs::get().vsync();},
        [](bool v) {prefs::get().set_vsync(v);});
 
    /* SELECT THEME */
    menu_button& theme_list = find_widget<menu_button>(this, "choose_theme", false);
    set_theme_list(theme_list);
    connect_signal_notify_modified(theme_list,
        std::bind(&preferences_dialog::handle_theme_select, this));
 
    /* SELECT GUI2 THEME */
    menu_button& gui2_theme_list = find_widget<menu_button>(this, "choose_gui2_theme", false);
    set_gui2_theme_list(gui2_theme_list);
    connect_signal_mouse_left_click(find_widget<button>(this, "apply", false),
        std::bind(&preferences_dialog::handle_gui2_theme_select, this));
 
    //
    // SOUND PANEL
    //
 
    /* SOUND FX */
    initialize_sound_option_group<sound, set_sound, sound_volume, set_sound_volume>("sfx");
 
    /* MUSIC */
    initialize_sound_option_group<music_on, set_music, music_volume, set_music_volume>("music");
 
    register_bool("sound_toggle_stop_music_in_background", true,
        []() {return prefs::get().stop_music_in_background();},
        [](bool v) {prefs::get().set_stop_music_in_background(v);});
 
    /* TURN BELL */
    initialize_sound_option_group<turn_bell, set_turn_bell, bell_volume, set_bell_volume>("bell");
 
    /* UI FX */
    initialize_sound_option_group<ui_sound_on, set_ui_sound, ui_volume, set_ui_volume>("uisfx");
 
    //
    // MULTIPLAYER PANEL
    //
 
    /* CHAT LINES */
    register_integer("chat_lines", true,
        []() {return prefs::get().chat_lines();},
        [](int v) {prefs::get().set_chat_lines(v);});
 
    /* CHAT TIMESTAMPPING */
    register_bool("chat_timestamps", true,
        []() {return prefs::get().chat_timestamp();},
        [](bool v) {prefs::get().set_chat_timestamp(v);});
 
    /* SAVE PASSWORD */
    register_bool("remember_password", true,
        []() {return prefs::get().remember_password();},
        [](bool v) {prefs::get().set_remember_password(v);});
 
    /* WHISPERS FROM FRIENDS ONLY */
    register_bool("lobby_whisper_friends_only", true,
        []() {return prefs::get().lobby_whisper_friends_only();},
        [](bool v) {prefs::get().set_lobby_whisper_friends_only(v);});
 
    /* LOBBY JOIN NOTIFICATIONS */
    lobby_joins_group.add_member(find_widget<toggle_button>(this, "lobby_joins_none", false, true), pref_constants::lobby_joins::show_none);
    lobby_joins_group.add_member(find_widget<toggle_button>(this, "lobby_joins_friends", false, true), pref_constants::lobby_joins::show_friends);
    lobby_joins_group.add_member(find_widget<toggle_button>(this, "lobby_joins_all", false, true), pref_constants::lobby_joins::show_all);
 
    lobby_joins_group.set_member_states(prefs::get().get_lobby_joins());
 
    lobby_joins_group.set_callback_on_value_change([&](widget&, const pref_constants::lobby_joins val) {
        prefs::get().set_lobby_joins(val);
    });
 
    /* FRIENDS LIST */
    listbox& friends_list = find_widget<listbox>(this, "friends_list", false);
 
    friends_list.clear();
 
    for(const auto& entry : prefs::get().get_acquaintances()) {
        friends_list.add_row(get_friends_list_row_data(entry.second));
    }
 
    update_friends_list_controls(friends_list);
 
    text_box& textbox = find_widget<text_box>(this, "friend_name_box", false);
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "add_friend", false), std::bind(
            &preferences_dialog::add_friend_list_entry,
            this, true,
            std::ref(textbox)));
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "add_ignored", false), std::bind(
            &preferences_dialog::add_friend_list_entry,
            this, false,
            std::ref(textbox)));
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "remove", false), std::bind(
            &preferences_dialog::remove_friend_list_entry,
            this,
            std::ref(friends_list),
            std::ref(textbox)));
 
    connect_signal_notify_modified(friends_list, std::bind(
            &preferences_dialog::on_friends_list_select,
            this,
            std::ref(friends_list),
            std::ref(textbox)));
 
    /* ALERTS */
    connect_signal_mouse_left_click(
            find_widget<button>(this, "mp_alerts", false),
            std::bind(&gui2::dialogs::mp_alerts_options::display<>));
 
    /* SET WESNOTHD PATH */
    connect_signal_mouse_left_click(
            find_widget<button>(this, "mp_wesnothd", false), std::bind([]() {return prefs::get().show_wesnothd_server_search();}));
 
 
    //
    // ADVANCED PANEL
    //
 
    listbox& advanced = find_widget<listbox>(this, "advanced_prefs", false);
 
    widget_data row_data;
 
    for(const auto& option : prefs::get().get_advanced_preferences()) {
        const std::string pref_name = option.field;
 
        row_data["pref_name"]["label"] = option.name;
        grid* main_grid = &advanced.add_row(row_data);
 
        grid& details_grid = find_widget<grid>(main_grid, "prefs_setter_grid", false);
        details_grid.set_visible(widget::visibility::invisible);
 
        // The toggle widget for toggle-type options (hidden for other types)
        toggle_button& toggle_box = find_widget<toggle_button>(main_grid, "value_toggle", false);
        toggle_box.set_visible(widget::visibility::hidden);
 
        if(!option.description.empty()) {
            find_widget<styled_widget>(main_grid, "description", false).set_label(option.description);
        }
 
        switch(option.type) {
            case preferences::option::avd_type::TOGGLE: {
 
                toggle_box.set_visible(widget::visibility::visible);
                toggle_box.set_value(preferences_dialog_friend::get(pref_name, option.cfg["default"].to_bool()));
 
                // A lambda alone would be more verbose because it'd need to specify all the parameters.
                connect_signal_mouse_left_click(toggle_box, std::bind(
                    [&, pref_name]() { preferences_dialog_friend::set(pref_name, toggle_box.get_value_bool()); }
                ));
 
                gui2::bind_status_label<toggle_button>(
                    main_grid, "value_toggle", default_status_value_getter<toggle_button>, "value");
 
                break;
            }
 
            case preferences::option::avd_type::SLIDER: {
                auto setter_widget = build_single_widget_instance<slider>(config {"definition", "minimal"});
                setter_widget->set_id("setter");
                // Maximum must be set first or this will assert
                setter_widget->set_value_range(option.cfg["min"].to_int(), option.cfg["max"].to_int());
                setter_widget->set_step_size(option.cfg["step"].to_int(1));
 
                details_grid.swap_child("setter", std::move(setter_widget), true);
 
                slider& slide = find_widget<slider>(&details_grid, "setter", false);
 
                slide.set_value(preferences_dialog_friend::get(pref_name, option.cfg["default"].to_int()));
 
                // A lambda alone would be more verbose because it'd need to specify all the parameters.
                connect_signal_notify_modified(slide, std::bind(
                    [&, pref_name]() { preferences_dialog_friend::set(pref_name, slide.get_value()); }
                ));
 
                gui2::bind_status_label<slider>(main_grid, "setter", default_status_value_getter<slider>, "value");
 
                break;
            }
 
            case preferences::option::avd_type::COMBO: {
                std::vector<config> menu_data;
                std::vector<std::string> option_ids;
 
                for(const config& choice : option.cfg.child_range("option")) {
                    config menu_item;
                    menu_item["label"] = choice["name"];
                    if(choice.has_attribute("description")) {
                        menu_item["details"] = std::string("<span color='#777'>") + choice["description"] + "</span>";
                    }
                    menu_data.push_back(menu_item);
                    option_ids.push_back(choice["id"]);
                }
 
                // Attempt to find an initial selection
                int selected = std::distance(option_ids.begin(), std::find(option_ids.begin(), option_ids.end(),
                    preferences_dialog_friend::get(pref_name, option.cfg["default"].str())
                ));
 
                // If the saved option value was invalid, reset selection to 0.
                if(selected < 0 || selected >= static_cast<int>(option_ids.size())) {
                    selected = 0;
                }
 
                auto setter_widget = build_single_widget_instance<menu_button>();
                setter_widget->set_id("setter");
 
                details_grid.swap_child("setter", std::move(setter_widget), true);
 
                menu_button& menu = find_widget<menu_button>(&details_grid, "setter", false);
 
                menu.set_use_markup(true);
                menu.set_values(menu_data, selected);
 
                // A lambda alone would be more verbose because it'd need to specify all the parameters.
                connect_signal_notify_modified(menu,
                    std::bind([=](widget& w) { preferences_dialog_friend::set(pref_name, option_ids[dynamic_cast<menu_button&>(w).get_value()]); }, std::placeholders::_1));
 
                gui2::bind_status_label<menu_button>(main_grid, "setter", default_status_value_getter<menu_button>, "value");
 
                break;
            }
 
            case preferences::option::avd_type::SPECIAL: {
                //main_grid->remove_child("setter");
 
                auto value_widget = build_single_widget_instance<image>();
                value_widget->set_label("icons/arrows/arrows_blank_right_25.png~CROP(3,3,18,18)");
 
                main_grid->swap_child("value", std::move(value_widget), true);
 
                break;
            }
        }
    }
 
    connect_signal_notify_modified(advanced, std::bind(
        &preferences_dialog::on_advanced_prefs_list_select,
        this,
        std::ref(advanced)));
 
    on_advanced_prefs_list_select(advanced);
 
    //
    // HOTKEYS PANEL
    //
 
    multimenu_button& hotkey_menu = find_widget<multimenu_button>(this, "hotkey_category_menu", false);
    connect_signal_notify_modified(hotkey_menu,
        std::bind(&preferences_dialog::hotkey_filter_callback, this));
 
    listbox& hotkey_list = setup_hotkey_list();
 
    text_box& filter = find_widget<text_box>(this, "filter", false);
    filter.set_text_changed_callback(std::bind(&preferences_dialog::hotkey_filter_callback, this));
 
    // Action column
    hotkey_list.register_translatable_sorting_option(0, [this](const int i) { return visible_hotkeys_[i]->description.str(); });
 
    // Hotkey column
    hotkey_list.register_sorting_option(1, [this](const int i) { return hotkey::get_names(visible_hotkeys_[i]->id); });
 
    // Scope columns
    hotkey_list.register_sorting_option(2, [this](const int i) { return !visible_hotkeys_[i]->scope[hotkey::SCOPE_GAME]; });
    hotkey_list.register_sorting_option(3, [this](const int i) { return !visible_hotkeys_[i]->scope[hotkey::SCOPE_EDITOR]; });
    hotkey_list.register_sorting_option(4, [this](const int i) { return !visible_hotkeys_[i]->scope[hotkey::SCOPE_MAIN_MENU]; });
 
    hotkey_list.set_active_sorting_option({0, sort_order::type::ascending}, true);
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "btn_add_hotkey", false), std::bind(
            &preferences_dialog::add_hotkey_callback,
            this,
            std::ref(hotkey_list)));
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "btn_clear_hotkey", false), std::bind(
            &preferences_dialog::remove_hotkey_callback,
            this,
            std::ref(hotkey_list)));
 
    connect_signal_mouse_left_click(
        find_widget<button>(this, "btn_reset_hotkeys", false), std::bind(
            &preferences_dialog::default_hotkey_callback,
            this));
}
 
listbox& preferences_dialog::setup_hotkey_list()
{
    widget_data row_data;
 
    t_string& row_icon   = row_data["img_icon"]["label"];
    t_string& row_action = row_data["lbl_desc"]["label"];
    t_string& row_hotkey = row_data["lbl_hotkey"]["label"];
 
    t_string& row_is_g   = row_data["lbl_is_game"]["label"];
    t_string& row_is_e   = row_data["lbl_is_editor"]["label"];
    t_string& row_is_m   = row_data["lbl_is_mainmenu"]["label"];
 
    listbox& hotkey_list = find_widget<listbox>(this, "list_hotkeys", false);
 
    hotkey_list.clear();
    visible_hotkeys_.clear();
    visible_categories_.clear();
 
    //
    // Main hotkeys list
    //
 
    // These translated initials should match those used in data/gui/window/preferences/02_hotkeys.cfg
    const std::string gh = "<span color='#0f0'>" + _("game_hotkeys^G") + "</span>";
    const std::string eh = "<span color='#0f0'>" + _("editor_hotkeys^E") + "</span>";
    const std::string mh = "<span color='#0f0'>" + _("mainmenu_hotkeys^M") + "</span>";
 
    for(const auto& [id, hotkey_item] : hotkey::get_hotkey_commands()) {
        if(hotkey_item.hidden) {
            continue;
        }
 
        visible_hotkeys_.push_back(&hotkey_item);
        visible_categories_.insert(hotkey_item.category);
 
        if(filesystem::file_exists(game_config::path + "/images/icons/action/" + hotkey_item.id + "_25.png")) {
            row_icon = "icons/action/" + hotkey_item.id + "_25.png~CROP(3,3,18,18)";
        } else {
            row_icon = "";
        }
 
        row_action = hotkey_item.description;
        row_hotkey = hotkey::get_names(hotkey_item.id);
 
        row_is_g = hotkey_item.scope[hotkey::SCOPE_GAME]      ? gh : "";
        row_is_e = hotkey_item.scope[hotkey::SCOPE_EDITOR]    ? eh : "";
        row_is_m = hotkey_item.scope[hotkey::SCOPE_MAIN_MENU] ? mh : "";
 
        hotkey_list.add_row(row_data);
    }
 
    //
    // Filter options
    //
 
    std::vector<config> filter_ops;
    for(const hotkey::HOTKEY_CATEGORY& cat : visible_categories_) {
        filter_ops.emplace_back("label", hotkey::get_translatable_category_name(cat), "checkbox", false);
    }
 
    find_widget<multimenu_button>(this, "hotkey_category_menu", false).set_values(filter_ops);
 
    return hotkey_list;
}
 
void preferences_dialog::add_hotkey_callback(listbox& hotkeys)
{
    int row_number = hotkeys.get_selected_row();
    if(row_number < 0) {
        gui2::show_transient_message("", _("No hotkey selected"));
        return;
    }
 
    const hotkey::hotkey_command& hotkey_item = *visible_hotkeys_[row_number];
 
    gui2::dialogs::hotkey_bind bind_dlg(hotkey_item.id);
    bind_dlg.show();
 
    hotkey::hotkey_ptr newhk = bind_dlg.get_new_binding();
    hotkey::hotkey_ptr oldhk;
 
    // only if not cancelled.
    if(newhk.get() == nullptr) {
        return;
    }
 
    for(const hotkey::hotkey_ptr& hk : hotkey::get_hotkeys()) {
        if(!hk->is_disabled() && newhk->bindings_equal(hk)) {
            oldhk = hk;
        }
    }
 
    if(oldhk && oldhk->get_command() == hotkey_item.id) {
        return;
    }
 
    if(oldhk && oldhk->get_command() != "null") {
        const std::string text = VGETTEXT("“<b>$hotkey_sequence|</b>” is in use by “<b>$old_hotkey_action|</b>”.\nDo you wish to reassign it to “<b>$new_hotkey_action|</b>”?", {
            {"hotkey_sequence",   oldhk->get_name()},
            {"old_hotkey_action", hotkey::get_hotkey_command(oldhk->get_command()).description},
            {"new_hotkey_action", hotkey::get_hotkey_command(newhk->get_command()).description}
        });
 
        const int res = gui2::show_message(_("Reassign Hotkey"), text, gui2::dialogs::message::yes_no_buttons, true);
        if(res != gui2::retval::OK) {
            return;
        }
    }
 
    hotkey::add_hotkey(newhk);
 
    // We need to recalculate all hotkey names in because we might have removed a hotkey from another command.
    for(std::size_t i = 0; i < hotkeys.get_item_count(); ++i) {
        const hotkey::hotkey_command& hotkey_item_row = *visible_hotkeys_[i];
        find_widget<label>(hotkeys.get_row_grid(i), "lbl_hotkey", false).set_label(hotkey::get_names(hotkey_item_row.id));
    }
}
 
void preferences_dialog::default_hotkey_callback()
{
    gui2::show_transient_message(_("Hotkeys Reset"), _("All hotkeys have been reset to their default values."));
 
    prefs::get().clear_hotkeys();
 
    // Set up the list again and reselect the default sorting option.
    listbox& hotkey_list = setup_hotkey_list();
    hotkey_list.set_active_sorting_option({0, sort_order::type::ascending}, true);
}
 
void preferences_dialog::remove_hotkey_callback(listbox& hotkeys)
{
    int row_number = hotkeys.get_selected_row();
    if(row_number < 0) {
        gui2::show_transient_message("", _("No hotkey selected"));
        return;
    }
 
    const hotkey::hotkey_command& hotkey_item = *visible_hotkeys_[row_number];
    hotkey::clear_hotkeys(hotkey_item.id);
    find_widget<label>(hotkeys.get_row_grid(row_number), "lbl_hotkey", false).set_label(hotkey::get_names(hotkey_item.id));
}
 
void preferences_dialog::hotkey_filter_callback()
{
    const multimenu_button& hotkey_menu = find_widget<const multimenu_button>(this, "hotkey_category_menu", false);
    const text_box& name_filter = find_widget<const text_box>(this, "filter", false);
 
    boost::dynamic_bitset<> toggle_states = hotkey_menu.get_toggle_states();
    boost::dynamic_bitset<> res(visible_hotkeys_.size());
 
    std::string text = name_filter.get_value();
 
    // Nothing selected. It means that *all* categories are shown.
    if(toggle_states.none()) {
        toggle_states = ~toggle_states;
    }
 
    for(std::size_t h = 0; h < visible_hotkeys_.size(); ++h) {
        // Default to true if there is no filter text
        bool found = true;
 
        if(!text.empty()) {
            const std::string description = visible_hotkeys_[h]->description.str();
 
            for(const auto& word : utils::split(text, ' ')) {
                found = translation::ci_search(description, word);
 
                // No match, we're excluding this hotkey
                if(!found) {
                    break;
                }
            }
        }
 
        unsigned cat_index = 0;
 
        // Filter categories
        for(const hotkey::HOTKEY_CATEGORY& cat : visible_categories_) {
            if(visible_hotkeys_[h]->category == cat) {
                break;
            } else {
                ++cat_index;
            }
        }
 
        if(cat_index < toggle_states.size() && found) {
            res[h] = toggle_states[cat_index];
        } else {
            res[h] = false;
        }
    }
 
    find_widget<listbox>(this, "list_hotkeys", false).set_row_shown(res);
}
 
void preferences_dialog::on_advanced_prefs_list_select(listbox& list)
{
    const int selected_row = list.get_selected_row();
    const auto& pref = prefs::get().get_advanced_preferences()[selected_row];
 
    if(pref.type == preferences::option::avd_type::SPECIAL) {
        if(pref.field == "logging") {
            gui2::dialogs::log_settings::display();
        } else if(pref.field == "orb_color") {
            gui2::dialogs::select_orb_colors::display();
        } else {
            WRN_GUI_L << "Invalid or unimplemented custom advanced prefs option: " << pref.field;
        }
 
        // Add more options here as needed
    }
 
    const bool has_description = !pref.description.empty();
 
    if(has_description || (pref.type != preferences::option::avd_type::SPECIAL && pref.type != preferences::option::avd_type::TOGGLE)) {
        find_widget<widget>(list.get_row_grid(selected_row), "prefs_setter_grid", false)
            .set_visible(widget::visibility::visible);
    }
 
    if(last_selected_item_ != selected_row) {
        find_widget<widget>(list.get_row_grid(last_selected_item_), "prefs_setter_grid", false)
            .set_visible(widget::visibility::invisible);
 
        last_selected_item_ = selected_row;
    }
}
 
void preferences_dialog::initialize_tabs(listbox& selector)
{
    //
    // MULTIPLAYER TABS
    //
    connect_signal_notify_modified(selector,
        std::bind(&preferences_dialog::on_tab_select, this));
}
 
void preferences_dialog::pre_show(window& window)
{
    set_always_save_fields(true);
 
    connect_signal_mouse_left_click(find_widget<button>(&window, "about", false), std::bind(&game_version::display<>));
 
    //
    // Status labels
    // These need to be set here in pre_show, once the fields are initialized. For some reason, this
    // is not the case for those in Advanced
    //
 
    gui2::bind_status_label<slider>(&window, "max_saves_slider");
    gui2::bind_status_label<slider>(&window, "turbo_slider");
    gui2::bind_status_label<slider>(&window, "pixel_scale_slider");
 
    //gui2::bind_status_label<slider>(&window, "scaling_slider",   [](slider& s)->std::string {
    //  return s.get_value_label() + "%";
    //});
 
    listbox& selector = find_widget<listbox>(&window, "selector", false);
    stacked_widget& pager = find_widget<stacked_widget>(&window, "pager", false);
 
    pager.set_find_in_all_layers(true);
 
    connect_signal_notify_modified(selector,
        std::bind(&preferences_dialog::on_page_select, this));
 
    window.keyboard_capture(&selector);
 
    VALIDATE(selector.get_item_count() == pager.get_layer_count(),
        "The preferences pager and its selector listbox do not have the same number of items.");
 
    const int main_index = index_in_pager_range(initial_index_.first, pager);
 
    // Loops through each pager layer and checks if it has both a tab bar
    // and stack. If so, it initializes the options for the former and
    // selects the specified layer of the latter.
    for(unsigned int i = 0; i < pager.get_layer_count(); ++i) {
        listbox* tab_selector = find_widget<listbox>(
            pager.get_layer_grid(i), "tab_selector", false, false);
 
        stacked_widget* tab_pager = find_widget<stacked_widget>(
            pager.get_layer_grid(i), "tab_pager", false, false);
 
        if(tab_pager && tab_selector) {
            const int ii = static_cast<int>(i);
            const int tab_index = index_in_pager_range(initial_index_.second, *tab_pager);
            const int to_select = (ii == main_index ? tab_index : 0);
 
            // Initialize tabs for this page
            initialize_tabs(*tab_selector);
 
            tab_selector->select_row(to_select);
            tab_pager->select_layer(to_select);
        }
    }
 
    // Finally, select the initial main page
    selector.select_row(main_index);
    pager.select_layer(main_index);
}
 
void preferences_dialog::set_visible_page(unsigned int page, const std::string& pager_id)
{
    find_widget<stacked_widget>(this, pager_id, false).select_layer(page);
}
 
// Special fullsceen callback
void preferences_dialog::fullscreen_toggle_callback()
{
    const bool ison = find_widget<toggle_button>(this, "fullscreen", false).get_value_bool();
    video::set_fullscreen(ison);
 
    menu_button& res_list = find_widget<menu_button>(this, "resolution_set", false);
 
    set_resolution_list(res_list);
    res_list.set_active(!ison);
}
 
void preferences_dialog::handle_res_select()
{
    menu_button& res_list = find_widget<menu_button>(this, "resolution_set", false);
 
    if(video::set_resolution(resolutions_[res_list.get_value()])) {
        set_resolution_list(res_list);
    }
}
 
void preferences_dialog::handle_theme_select()
{
    menu_button& theme_list = find_widget<menu_button>(this, "choose_theme", false);
 
    const auto selection = theme_list.get_value();
    const auto& theme = themes_.at(selection);
    auto* display = display::get_singleton();
 
    prefs::get().set_theme(theme.id);
    if(display && resources::gamedata && resources::gamedata->get_theme().empty()) {
        display->set_theme(theme.id);
    }
 
}
 
void preferences_dialog::handle_gui2_theme_select()
{
    menu_button& gui2_theme_list = find_widget<menu_button>(this, "choose_gui2_theme", false);
    unsigned selected_theme = gui2_theme_list.get_value();
    if (selected_theme != current_gui_theme_) {
        current_gui_theme_ = selected_theme;
        prefs::get().set_gui2_theme(gui2_themes_.at(selected_theme));
        set_retval(gui2::dialogs::title_screen::RELOAD_UI);
    }
}
 
void preferences_dialog::on_page_select()
{
    const int selected_row =
        std::max(0, find_widget<listbox>(this, "selector", false).get_selected_row());
    set_visible_page(static_cast<unsigned int>(selected_row), "pager");
}
 
void preferences_dialog::on_tab_select()
{
    const int selected_row =
        std::max(0, find_widget<listbox>(this, "tab_selector", false).get_selected_row());
    set_visible_page(static_cast<unsigned int>(selected_row), "tab_pager");
}
 
void preferences_dialog::post_show(window& /*window*/)
{
    prefs::get().save_hotkeys();
 
    // Save new prefs to disk. This also happens on app close, but doing
    // it here too ensures nothing is lost in case of, say, a crash.
    prefs::get().write_preferences();
}
 
} // namespace dialogs