picker_gui.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "stdafx.h"
#include "core/backup_type.hpp"
#include "company_func.h"
#include "dropdown_func.h"
#include "gui.h"
#include "hotkeys.h"
#include "ini_type.h"
#include "newgrf_badge.h"
#include "newgrf_badge_config.h"
#include "newgrf_badge_gui.h"
#include "picker_gui.h"
#include "querystring_gui.h"
#include "settings_type.h"
#include "sortlist_type.h"
#include "sound_func.h"
#include "sound_type.h"
#include "string_func.h"
#include "stringfilter_type.h"
#include "strings_func.h"
#include "widget_type.h"
#include "window_func.h"
#include "window_gui.h"
#include "window_type.h"
#include "zoom_func.h"
 
#include "widgets/picker_widget.h"
 
#include "table/sprites.h"
#include "table/strings.h"
 
#include <charconv>
 
#include "safeguards.h"
 
static std::vector<PickerCallbacks *> &GetPickerCallbacks()
{
  static std::vector<PickerCallbacks *> callbacks;
  return callbacks;
}
 
PickerCallbacks::PickerCallbacks(const std::string &ini_group) : ini_group(ini_group)
{
  GetPickerCallbacks().push_back(this);
}

PickerCallbacks::~PickerCallbacks()
{
  auto &callbacks = GetPickerCallbacks();
  callbacks.erase(std::ranges::find(callbacks, this));
}

static void PickerLoadConfig(const IniFile &ini, PickerCallbacks &callbacks)
{
  callbacks.saved.clear();
  for (const IniGroup &group : ini.groups) {
    /* Read the collection name */
    if (!group.name.starts_with(callbacks.ini_group)) continue;
    auto pos = group.name.find('-');
    if (pos == std::string_view::npos && group.name != callbacks.ini_group) continue;
    std::string collection = (pos == std::string_view::npos) ? "" : group.name.substr(pos + 1);
 
    if (group.items.empty() && pos != std::string_view::npos) {
      callbacks.saved[collection];
      continue;
    }
 
    for (const IniItem &item : group.items) {
      std::array<uint8_t, 4> grfid_buf;
 
      std::string_view str = item.name;
 
      /* Try reading "<grfid>|<localid>" */
      auto grfid_pos = str.find('|');
      if (grfid_pos == std::string_view::npos) continue;
 
      std::string_view grfid_str = str.substr(0, grfid_pos);
      if (!ConvertHexToBytes(grfid_str, grfid_buf)) continue;
 
      str = str.substr(grfid_pos + 1);
      GrfID grfid = grfid_buf[0] | (grfid_buf[1] << 8) | (grfid_buf[2] << 16) | (grfid_buf[3] << 24);
      uint16_t localid;
      auto [ptr, err] = std::from_chars(str.data(), str.data() + str.size(), localid);
 
      if (err == std::errc{} && ptr == str.data() + str.size()) {
        callbacks.saved[collection].emplace(grfid, localid, 0, 0);
      }
    }
  }
}

static void PickerSaveConfig(IniFile &ini, const PickerCallbacks &callbacks)
{
  /* Clean the ini file of any obsolete collections to prevent them coming back after a restart */
  for (const std::string &rm_collection : callbacks.rm_collections) {
    ini.RemoveGroup(callbacks.ini_group + "-" + rm_collection);
  }
 
  for (const auto &collection : callbacks.saved) {
    IniGroup &group = ini.GetOrCreateGroup(collection.first == "" ? callbacks.ini_group : callbacks.ini_group + "-" + collection.first);
    group.Clear();
    for (const PickerItem &item : collection.second) {
      std::string key = fmt::format("{:08X}|{}", std::byteswap(item.grfid), item.local_id);
      group.CreateItem(key);
    }
  }
}

void PickerLoadConfig(const IniFile &ini)
{
  for (auto *cb : GetPickerCallbacks()) PickerLoadConfig(ini, *cb);
}

void PickerSaveConfig(IniFile &ini)
{
  for (const auto *cb : GetPickerCallbacks()) PickerSaveConfig(ini, *cb);
}

static bool ClassIDSorter(int const &a, int const &b)
{
  return a < b;
}

static bool ClassTagNameFilter(int const *item, PickerFilterData &filter)
{
  filter.ResetState();
  filter.AddLine(GetString(filter.callbacks->GetClassName(*item)));
  return filter.GetState();
}

static bool TypeIDSorter(PickerItem const &a, PickerItem const &b)
{
  int r = a.class_index - b.class_index;
  if (r == 0) r = a.index - b.index;
  return r < 0;
}

static bool TypeTagNameFilter(PickerItem const *item, PickerFilterData &filter)
{
  auto badges = filter.callbacks->GetTypeBadges(item->class_index, item->index);
  if (filter.bdf.has_value() && !filter.bdf->Filter(badges)) return false;
  if (filter.btf.has_value() && filter.btf->Filter(badges)) return true;
 
  filter.ResetState();
  filter.AddLine(GetString(filter.callbacks->GetTypeName(item->class_index, item->index)));
  return filter.GetState();
}

PickerWindow *picker_window;

static bool CollectionIDSorter(std::string const &a, std::string const &b)
{
  if (a == GetString(STR_PICKER_DEFAULT_COLLECTION) || b == GetString(STR_PICKER_DEFAULT_COLLECTION)) return a == GetString(STR_PICKER_DEFAULT_COLLECTION);
  if (picker_window->inactive.contains(a) == picker_window->inactive.contains(b)) return StrNaturalCompare(a, b) < 0;
  return picker_window->inactive.contains(a) < picker_window->inactive.contains(b);
}
 
static const std::initializer_list<PickerClassList::SortFunction * const> _class_sorter_funcs = { &ClassIDSorter }; 
static const std::initializer_list<PickerClassList::FilterFunction * const> _class_filter_funcs = { &ClassTagNameFilter }; 
static const std::initializer_list<PickerTypeList::SortFunction * const> _type_sorter_funcs = { TypeIDSorter }; 
static const std::initializer_list<PickerTypeList::FilterFunction * const> _type_filter_funcs = { TypeTagNameFilter }; 
static const std::initializer_list<PickerCollectionList::SortFunction * const> _collection_sorter_funcs = { &CollectionIDSorter }; 
 
 
PickerWindow::PickerWindow(WindowDesc &desc, Window *parent, WindowNumber window_number, PickerCallbacks &callbacks) : PickerWindowBase(desc, parent), callbacks(callbacks),
  class_editbox(EDITBOX_MAX_SIZE * MAX_CHAR_LENGTH, EDITBOX_MAX_SIZE),
  type_editbox(EDITBOX_MAX_SIZE * MAX_CHAR_LENGTH, EDITBOX_MAX_SIZE)
{
  this->window_number = window_number;
 
  /* Init of nested tree is deferred.
   * PickerWindow::ConstructWindow must be called by the inheriting window. */
}
 
void PickerWindow::ConstructWindow()
{
  this->CreateNestedTree();
 
  /* Test if pickers should be active.*/
  bool is_active = this->callbacks.IsActive();
 
  this->preview_height = std::max(this->callbacks.preview_height, PREVIEW_HEIGHT);
  picker_window = this;
 
  /* Functionality depends on widgets being present, not window class. */
  this->has_class_picker = is_active && this->GetWidget<NWidgetBase>(WID_PW_CLASS_LIST) != nullptr && this->callbacks.HasClassChoice();
  this->has_type_picker = is_active && this->GetWidget<NWidgetBase>(WID_PW_TYPE_MATRIX) != nullptr;
  this->has_collection_picker = is_active && this->GetWidget<NWidgetBase>(WID_PW_COLEC_LIST) != nullptr;
 
  if (this->has_class_picker) {
    this->GetWidget<NWidgetCore>(WID_PW_CLASS_LIST)->SetToolTip(this->callbacks.GetClassTooltip());
 
    this->querystrings[WID_PW_CLASS_FILTER] = &this->class_editbox;
  } else {
    if (auto *nwid = this->GetWidget<NWidgetStacked>(WID_PW_CLASS_SEL); nwid != nullptr) {
      /* Check the container orientation. MakeNWidgets adds an additional NWID_VERTICAL container so we check the grand-parent. */
      bool is_vertical = (nwid->parent->parent->type == NWID_VERTICAL);
      nwid->SetDisplayedPlane(is_vertical ? SZSP_HORIZONTAL : SZSP_VERTICAL);
    }
  }
 
  this->class_editbox.cancel_button = QueryString::ACTION_CLEAR;
  this->class_string_filter.SetFilterTerm(this->class_editbox.text.GetText());
  this->class_string_filter.callbacks = &this->callbacks;
 
  this->classes.SetListing(this->callbacks.class_last_sorting);
  this->classes.SetFiltering(this->callbacks.class_last_filtering);
  this->classes.SetSortFuncs(_class_sorter_funcs);
  this->classes.SetFilterFuncs(_class_filter_funcs);
 
  /* Update saved type information. */
  if (this->callbacks.sel_collection == "") SetWidgetsDisabledState(true, WID_PW_COLEC_RENAME, WID_PW_COLEC_DELETE);
  this->callbacks.saved = this->callbacks.UpdateSavedItems(this->callbacks.saved);
  this->inactive = this->callbacks.InitializeInactiveCollections(this->callbacks.saved);
  this->collections.ForceRebuild();
 
  /* Clear used type information. */
  this->callbacks.used.clear();
 
  if (this->has_type_picker) {
    /* Populate used type information. */
    this->callbacks.FillUsedItems(this->callbacks.used);
 
    SetWidgetDisabledState(WID_PW_MODE_ALL, !this->callbacks.HasClassChoice());
 
    this->GetWidget<NWidgetCore>(WID_PW_TYPE_ITEM)->SetToolTip(this->callbacks.GetTypeTooltip());
 
    auto *matrix = this->GetWidget<NWidgetMatrix>(WID_PW_TYPE_MATRIX);
    matrix->SetScrollbar(this->GetScrollbar(WID_PW_TYPE_SCROLL));
 
    this->querystrings[WID_PW_TYPE_FILTER] = &this->type_editbox;
  } else {
    if (auto *nwid = this->GetWidget<NWidgetStacked>(WID_PW_TYPE_SEL); nwid != nullptr) {
      /* Check the container orientation. MakeNWidgets adds an additional NWID_VERTICAL container so we check the grand-parent. */
      bool is_vertical = (nwid->parent->parent->type == NWID_VERTICAL);
      nwid->SetDisplayedPlane(is_vertical ? SZSP_HORIZONTAL : SZSP_VERTICAL);
    }
  }
 
  this->type_editbox.cancel_button = QueryString::ACTION_CLEAR;
  this->type_string_filter.SetFilterTerm(this->type_editbox.text.GetText());
  this->type_string_filter.callbacks = &this->callbacks;
 
  this->types.SetListing(this->callbacks.type_last_sorting);
  this->types.SetFiltering(this->callbacks.type_last_filtering);
  this->types.SetSortFuncs(_type_sorter_funcs);
  this->types.SetFilterFuncs(_type_filter_funcs);
 
  if (this->has_collection_picker) {
    this->GetWidget<NWidgetCore>(WID_PW_COLEC_LIST)->SetToolTip(this->callbacks.GetCollectionTooltip());
  }
 
  this->collections.SetListing(this->callbacks.collection_last_sorting);
  this->collections.SetSortFuncs(_collection_sorter_funcs);
 
  this->FinishInitNested(this->window_number);
 
  this->InvalidateData(PICKER_INVALIDATION_ALL);
}
 
void PickerWindow::OnInit()
{
  this->badge_classes = GUIBadgeClasses(this->callbacks.GetFeature());
  this->badge_filters = AddBadgeDropdownFilters(this, WID_PW_BADGE_FILTER, WID_PW_BADGE_FILTER, Colours::DarkGreen, this->callbacks.GetFeature());
 
  this->widget_lookup.clear();
  this->nested_root->FillWidgetLookup(this->widget_lookup);
}
 
void PickerWindow::Close(int data)
{
  this->callbacks.Close(data);
  this->PickerWindowBase::Close(data);
}
 
void PickerWindow::UpdateWidgetSize(WidgetID widget, Dimension &size, const Dimension &padding, Dimension &fill, Dimension &resize)
{
  switch (widget) {
    /* Class picker */
    case WID_PW_CLASS_LIST:
      fill.height = resize.height = GetCharacterHeight(FontSize::Normal) + padding.height;
      size.height = 5 * resize.height;
      break;
 
    /* Type picker */
    case WID_PW_TYPE_MATRIX:
      /* At least two items wide. */
      size.width += resize.width;
      fill.width = resize.width;
      fill.height = 1;
 
      /* Resizing in X direction only at blob size, but at pixel level in Y. */
      resize.height = 1;
      break;
 
    /* Type picker */
    case WID_PW_TYPE_ITEM:
      size.width  = ScaleGUITrad(PREVIEW_WIDTH) + WidgetDimensions::scaled.fullbevel.Horizontal();
      size.height = ScaleGUITrad(this->preview_height) + WidgetDimensions::scaled.fullbevel.Vertical();
      break;
 
    case WID_PW_CONFIGURE_BADGES:
      /* Hide the configuration button if no configurable badges are present. */
      if (this->badge_classes.GetClasses().empty()) size = {0, 0};
      break;
  }
}
 
std::string PickerWindow::GetWidgetString(WidgetID widget, StringID stringid) const
{
  switch (widget) {
    case WID_PW_COLEC_LIST:
      return this->callbacks.sel_collection == "" ? GetString(STR_PICKER_DEFAULT_COLLECTION) : this->callbacks.sel_collection;
 
    default:
      if (IsInsideMM(widget, this->badge_filters.first, this->badge_filters.second)) {
        return this->GetWidget<NWidgetBadgeFilter>(widget)->GetStringParameter(this->badge_filter_choices);
      }
      break;
  }
  return this->Window::GetWidgetString(widget, stringid);
}
 
DropDownList PickerWindow::BuildCollectionDropDownList()
{
  DropDownList list;
  int i = 0;
  for (const auto &collection : collections) {
    list.push_back(MakeDropDownListStringItem(GetString(collection == "" ? STR_PICKER_DEFAULT_COLLECTION : STR_JUST_RAW_STRING, collection), i, false, this->inactive.contains(collection)));
    i++;
  }
  return list;
}
 
void PickerWindow::DrawWidget(const Rect &r, WidgetID widget) const
{
  switch (widget) {
    /* Class picker */
    case WID_PW_CLASS_LIST: {
      Rect ir = r.Shrink(WidgetDimensions::scaled.matrix);
      const int selected = this->callbacks.GetSelectedClass();
      const auto vscroll = this->GetScrollbar(WID_PW_CLASS_SCROLL);
      const int y_step = this->GetWidget<NWidgetResizeBase>(widget)->resize_y;
      auto [first, last] = vscroll->GetVisibleRangeIterators(this->classes);
      for (auto it = first; it != last; ++it) {
        DrawString(ir, this->callbacks.GetClassName(*it), *it == selected ? TextColour::White : TextColour::Black);
        ir.top += y_step;
      }
      break;
    }
 
    /* Type picker */
    case WID_PW_TYPE_ITEM: {
      assert(this->GetWidget<NWidgetBase>(widget)->GetParentWidget<NWidgetMatrix>()->GetCurrentElement() < static_cast<int>(this->types.size()));
      const auto &item = this->types[this->GetWidget<NWidgetBase>(widget)->GetParentWidget<NWidgetMatrix>()->GetCurrentElement()];
 
      DrawPixelInfo tmp_dpi;
      Rect ir = r.Shrink(WidgetDimensions::scaled.bevel);
      if (FillDrawPixelInfo(&tmp_dpi, ir)) {
        AutoRestoreBackup dpi_backup(_cur_dpi, &tmp_dpi);
        int x = (ir.Width()  - ScaleSpriteTrad(PREVIEW_WIDTH)) / 2 + ScaleSpriteTrad(PREVIEW_LEFT);
        int y = (ir.Height() + ScaleSpriteTrad(this->preview_height)) / 2 - ScaleSpriteTrad(PREVIEW_BOTTOM);
 
        this->callbacks.DrawType(x, y, item.class_index, item.index);
 
        int by = ir.Height() - ScaleGUITrad(12);
 
        GrfSpecFeature feature = this->callbacks.GetFeature();
        /* Houses have recolours but not related to the company colour and other items depend on gamemode. */
        PaletteID palette = _game_mode != GameMode::Normal || feature == GrfSpecFeature::Houses ? PAL_NONE : GetCompanyPalette(_local_company);
        DrawBadgeColumn({0, by, ir.Width() - 1, ir.Height() - 1}, 0, this->badge_classes, this->callbacks.GetTypeBadges(item.class_index, item.index), feature, std::nullopt, palette);
 
        if (this->callbacks.saved.contains(this->callbacks.sel_collection)) {
          if (this->callbacks.saved.at(this->callbacks.sel_collection).contains(item)) {
            DrawSprite(SPR_BLOT, PALETTE_TO_YELLOW, 0, 0);
          }
        }
        if (this->callbacks.used.contains(item)) {
          DrawSprite(SPR_BLOT, PALETTE_TO_GREEN, ir.Width() - GetSpriteSize(SPR_BLOT).width, 0);
        }
      }
 
      if (!this->callbacks.IsTypeAvailable(item.class_index, item.index)) {
        GfxFillRect(ir, GetColourGradient(Colours::Grey, Shade::Darker), FillRectMode::Checker);
      }
      break;
    }
 
    case WID_PW_TYPE_NAME: {
      StringID str = this->callbacks.GetTypeName(this->callbacks.GetSelectedClass(), this->callbacks.GetSelectedType());
      if (str != INVALID_STRING_ID) DrawString(r, str, TextColour::Gold, {AlignmentH::Centre, AlignmentV::Middle});
      break;
    }
  }
}
 
void PickerWindow::OnResize()
{
  if (this->has_class_picker) {
    this->GetScrollbar(WID_PW_CLASS_SCROLL)->SetCapacityFromWidget(this, WID_PW_CLASS_LIST);
  }
}
 
void PickerWindow::DeletePickerCollectionCallback(Window *win, bool confirmed)
{
  if (confirmed) {
    PickerWindow *w = (PickerWindow*)win;
    w->callbacks.saved.erase(w->callbacks.saved.find(w->callbacks.edit_collection));
    w->inactive.erase(w->callbacks.edit_collection);
    w->callbacks.rm_collections.emplace(w->callbacks.edit_collection);
    w->callbacks.sel_collection = "";
    w->callbacks.edit_collection.clear();
    picker_window = w;
    w->SetWidgetsDisabledState(true, WID_PW_COLEC_RENAME, WID_PW_COLEC_DELETE);
    w->InvalidateData({PickerInvalidation::Collection, PickerInvalidation::Position});
  }
}
 
void PickerWindow::OnClick(Point pt, WidgetID widget, int)
{
  switch (widget) {
    /* Class Picker */
    case WID_PW_CLASS_LIST: {
      const auto vscroll = this->GetWidget<NWidgetScrollbar>(WID_PW_CLASS_SCROLL);
      auto it = vscroll->GetScrolledItemFromWidget(this->classes, pt.y, this, WID_PW_CLASS_LIST);
      if (it == this->classes.end()) return;
 
      if (_ctrl_pressed) {
        /* If no collections yet exist, create the default collection. */
        if (this->callbacks.saved.find(this->callbacks.sel_collection) == this->callbacks.saved.end()) {
          for (int i = 0; i < this->callbacks.GetTypeCount(*it); i++) {
            this->callbacks.saved[""].emplace(this->callbacks.GetPickerItem(*it, i));
          }
          this->InvalidateData({PickerInvalidation::Collection, PickerInvalidation::Class});
          this->SetDirty();
          break;
        }
 
        /* If the first item is not already saved to the selected collection, add the whole class to the collection. Otherwise remove the class. */
        auto &collection = this->callbacks.saved.at(this->callbacks.sel_collection);
        auto first = collection.find(this->callbacks.GetPickerItem(*it, 0));
        if (first == std::end(collection)) {
          for (int i = 0; i < this->callbacks.GetTypeCount(*it); i++) {
            collection.emplace(this->callbacks.GetPickerItem(*it, i));
          }
        } else {
          for (int i = 0; i < this->callbacks.GetTypeCount(*it); i++) {
            collection.erase(this->callbacks.GetPickerItem(*it, i));
          }
        }
        this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Class});
        break;
      }
 
      if (this->callbacks.GetSelectedClass() != *it || this->callbacks.mode.Test(PickerFilterMode::All)) {
        this->callbacks.mode.Reset(PickerFilterMode::All); // Disable showing all.
        this->callbacks.SetSelectedClass(*it);
        this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Position, PickerInvalidation::Validate});
      }
      SndClickBeep();
      CloseWindowById(WindowClass::JoinStation, 0);
      break;
    }
 
    case WID_PW_MODE_ALL:
    case WID_PW_MODE_USED:
    case WID_PW_MODE_SAVED:
      this->callbacks.mode.Flip(static_cast<PickerFilterMode>(widget - WID_PW_MODE_ALL));
      if (!this->IsWidgetDisabled(WID_PW_MODE_ALL) && this->callbacks.mode.Test(static_cast<PickerFilterMode>(widget - WID_PW_MODE_ALL))) {
        /* Enabling used or saved filters automatically enables all. */
        this->callbacks.mode.Set(PickerFilterMode::All);
      }
      this->InvalidateData({PickerInvalidation::Class, PickerInvalidation::Type, PickerInvalidation::Position});
      SndClickBeep();
      break;
 
    case WID_PW_SHRINK:
      this->callbacks.preview_height = this->preview_height = _ctrl_pressed ? PREVIEW_HEIGHT : std::max(PREVIEW_HEIGHT, this->preview_height - STEP_PREVIEW_HEIGHT);
      this->InvalidateData({});
      this->ReInit();
      break;
 
    case WID_PW_EXPAND:
      this->callbacks.preview_height = this->preview_height = _ctrl_pressed ? MAX_PREVIEW_HEIGHT : std::min(MAX_PREVIEW_HEIGHT, this->preview_height + STEP_PREVIEW_HEIGHT);
      this->InvalidateData({});
      this->ReInit();
      break;
 
    /* Type Picker */
    case WID_PW_TYPE_ITEM: {
      int sel = this->GetWidget<NWidgetBase>(widget)->GetParentWidget<NWidgetMatrix>()->GetCurrentElement();
      assert(sel < (int)this->types.size());
      const auto &item = this->types[sel];
 
      if (_ctrl_pressed) {
        if (this->callbacks.saved.find(this->callbacks.sel_collection) == this->callbacks.saved.end()) {
          this->callbacks.saved[""].emplace(item);
          this->InvalidateData({PickerInvalidation::Collection, PickerInvalidation::Class});
          this->SetDirty();
          break;
        }
 
        auto it = this->callbacks.saved.at(this->callbacks.sel_collection).find(item);
        if (it == std::end(this->callbacks.saved.at(this->callbacks.sel_collection))) {
          this->callbacks.saved.at(this->callbacks.sel_collection).emplace(item);
        } else {
          this->callbacks.saved.at(this->callbacks.sel_collection).erase(it);
        }
        this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Class});
        break;
      }
 
      if (this->callbacks.IsTypeAvailable(item.class_index, item.index)) {
        this->callbacks.SetSelectedClass(item.class_index);
        this->callbacks.SetSelectedType(item.index);
        this->InvalidateData(PickerInvalidation::Position);
      }
      SndClickBeep();
      CloseWindowById(WindowClass::JoinStation, 0);
      break;
    }
 
    case WID_PW_COLEC_LIST: {
      ShowDropDownList(this, this->BuildCollectionDropDownList(), -1, widget, 0, DropDownOption::Filterable);
      CloseWindowById(WindowClass::JoinStation, 0);
      break;
    }
 
    case WID_PW_COLEC_ADD:
      this->callbacks.rename_collection = false;
      ShowQueryString({}, STR_PICKER_COLLECTION_ADD_TOOLTIP, MAX_LENGTH_GROUP_NAME_CHARS, this, CS_ALPHANUMERAL, QueryStringFlag::LengthIsInChars);
      break;
 
    case WID_PW_COLEC_RENAME:
      if (this->callbacks.saved.contains(this->callbacks.sel_collection)) {
        CloseChildWindows(WindowClass::ConfirmPopupQuery);
        this->callbacks.edit_collection = this->callbacks.sel_collection;
        this->callbacks.rename_collection = true;
        ShowQueryString(this->callbacks.sel_collection, STR_PICKER_COLLECTION_RENAME_QUERY, MAX_LENGTH_GROUP_NAME_CHARS, this, CS_ALPHANUMERAL, QueryStringFlag::LengthIsInChars);
      }
      break;
 
    case WID_PW_COLEC_DELETE:
      if (this->callbacks.saved.contains(this->callbacks.sel_collection)) {
        CloseChildWindows(WindowClass::QueryString);
        this->callbacks.edit_collection = this->callbacks.sel_collection;
 
        this->inactive.contains(this->callbacks.sel_collection) ?
            ShowQuery(GetEncodedString(STR_PICKER_COLLECTION_DELETE_QUERY), GetEncodedString(STR_PICKER_COLLECTION_DELETE_QUERY_DISABLED_TEXT), this, DeletePickerCollectionCallback) :
            ShowQuery(GetEncodedString(STR_PICKER_COLLECTION_DELETE_QUERY), GetEncodedString(STR_PICKER_COLLECTION_DELETE_QUERY_TEXT), this, DeletePickerCollectionCallback);
      }
      break;
 
    case WID_PW_CONFIGURE_BADGES:
      if (this->badge_classes.GetClasses().empty()) break;
      ShowDropDownList(this, BuildBadgeClassConfigurationList(this->badge_classes, 1, {}, Colours::DarkGreen), -1, widget, 0, DropDownOption::Persist);
      break;
 
    default:
      if (IsInsideMM(widget, this->badge_filters.first, this->badge_filters.second)) {
        /* Houses have recolours but not related to the company colour and other items depend on gamemode. */
        PaletteID palette = _game_mode != GameMode::Normal || this->callbacks.GetFeature() == GrfSpecFeature::Houses ? PAL_NONE : GetCompanyPalette(_local_company);
        ShowDropDownList(this, this->GetWidget<NWidgetBadgeFilter>(widget)->GetDropDownList(palette), -1, widget, 0, DropDownOption::Filterable);
      }
      break;
  }
}
 
void PickerWindow::OnQueryTextFinished(std::optional<std::string> str)
{
  if (!str.has_value()) return;
 
  if (!this->callbacks.saved.contains(*str)) {
    if (this->callbacks.saved.contains(this->callbacks.edit_collection) && this->callbacks.rename_collection) {
      auto rename_collection = this->callbacks.saved.extract(this->callbacks.edit_collection);
      rename_collection.key() = *str;
      this->callbacks.saved.insert(std::move(rename_collection));
 
      if (this->inactive.contains(this->callbacks.edit_collection)) {
        this->inactive.erase(this->callbacks.edit_collection);
        this->inactive.emplace(*str);
      }
 
      this->callbacks.rm_collections.emplace(this->callbacks.edit_collection);
      this->callbacks.edit_collection.clear();
 
    } else {
      this->callbacks.saved.insert({*str, {}});
    }
  }
 
  this->callbacks.sel_collection = *str;
  picker_window = this;
  SetWidgetsDisabledState(this->callbacks.sel_collection == "" ? true : false, WID_PW_COLEC_RENAME, WID_PW_COLEC_DELETE);
  if (!IsWidgetLowered(WID_PW_MODE_SAVED)) {
    this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Class});
  }
  this->InvalidateData({PickerInvalidation::Collection, PickerInvalidation::Position});
}
 
void PickerWindow::OnDropdownSelect(WidgetID widget, int index, int click_result)
{
  switch (widget) {
    case WID_PW_COLEC_LIST: {
      auto it = this->collections.begin() + index;
      if (this->callbacks.sel_collection != *it) {
        this->callbacks.sel_collection = *it;
        if (this->IsWidgetLowered(WID_PW_MODE_SAVED)) this->InvalidateData({PickerInvalidation::Class, PickerInvalidation::Type, PickerInvalidation::Validate});
        this->InvalidateData(PickerInvalidation::Position);
      }
      SetWidgetsDisabledState(this->callbacks.sel_collection == "" ? true : false, WID_PW_COLEC_RENAME, WID_PW_COLEC_DELETE);
 
      SndClickBeep();
      break;
    }
 
    case WID_PW_CONFIGURE_BADGES: {
      bool reopen = HandleBadgeConfigurationDropDownClick(this->callbacks.GetFeature(), 1, index, click_result, this->badge_filter_choices);
 
      this->ReInit();
 
      if (reopen) {
        ReplaceDropDownList(this, BuildBadgeClassConfigurationList(this->badge_classes, 1, {}, Colours::DarkGreen), -1);
      } else {
        this->CloseChildWindows(WindowClass::DropdownMenu);
      }
 
      /* We need to refresh if a filter is removed. */
      this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Filter, PickerInvalidation::Position});
      break;
    }
 
    default:
      if (IsInsideMM(widget, this->badge_filters.first, this->badge_filters.second)) {
        if (index < 0) {
          ResetBadgeFilter(this->badge_filter_choices, this->GetWidget<NWidgetBadgeFilter>(widget)->GetBadgeClassID());
        } else {
          SetBadgeFilter(this->badge_filter_choices, BadgeID(index));
        }
        this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Filter, PickerInvalidation::Position});
      }
      break;
  }
}
 
void PickerWindow::OnInvalidateData(int data, bool gui_scope)
{
  if (!gui_scope) return;
 
  PickerInvalidations pi(data);
 
  if (pi.Test(PickerInvalidation::Filter)) {
    if (this->badge_filter_choices.empty()) {
      this->type_string_filter.bdf.reset();
    } else {
      this->type_string_filter.bdf.emplace(this->badge_filter_choices);
    }
    this->types.SetFilterState(!type_string_filter.IsEmpty() || type_string_filter.bdf.has_value());
  }
 
  if (pi.Test(PickerInvalidation::Class)) this->classes.ForceRebuild();
  if (pi.Test(PickerInvalidation::Type)) this->types.ForceRebuild();
  if (pi.Test(PickerInvalidation::Collection)) this->collections.ForceRebuild();
 
  this->BuildPickerClassList();
  if (pi.Test(PickerInvalidation::Validate)) this->EnsureSelectedClassIsValid();
  if (pi.Test(PickerInvalidation::Position)) this->EnsureSelectedClassIsVisible();
 
  this->BuildPickerTypeList();
  if (pi.Test(PickerInvalidation::Validate)) this->EnsureSelectedTypeIsValid();
  if (pi.Test(PickerInvalidation::Position)) this->EnsureSelectedTypeIsVisible();
 
  this->BuildPickerCollectionList();
 
  if (this->has_type_picker) {
    SetWidgetLoweredState(WID_PW_MODE_ALL, this->callbacks.mode.Test(PickerFilterMode::All));
    SetWidgetLoweredState(WID_PW_MODE_USED, this->callbacks.mode.Test(PickerFilterMode::Used));
    SetWidgetLoweredState(WID_PW_MODE_SAVED, this->callbacks.mode.Test(PickerFilterMode::Saved));
  }
 
  SetWidgetDisabledState(WID_PW_SHRINK, this->preview_height == PREVIEW_HEIGHT);
  SetWidgetDisabledState(WID_PW_EXPAND, this->preview_height == MAX_PREVIEW_HEIGHT);
}
 
EventState PickerWindow::OnHotkey(int hotkey)
{
  switch (hotkey) {
    case PCWHK_FOCUS_FILTER_BOX:
      /* Cycle between the two edit boxes. */
      if (this->has_type_picker && (this->nested_focus == nullptr || this->nested_focus->GetIndex() != WID_PW_TYPE_FILTER)) {
        this->SetFocusedWidget(WID_PW_TYPE_FILTER);
      } else if (this->has_class_picker && (this->nested_focus == nullptr || this->nested_focus->GetIndex() != WID_PW_CLASS_FILTER)) {
        this->SetFocusedWidget(WID_PW_CLASS_FILTER);
      }
      SetFocusedWindow(this);
      return EventState::Handled;
 
    default:
      return EventState::NotHandled;
  }
}
 
void PickerWindow::OnEditboxChanged(WidgetID wid)
{
  switch (wid) {
    case WID_PW_CLASS_FILTER:
      this->class_string_filter.SetFilterTerm(this->class_editbox.text.GetText());
      this->classes.SetFilterState(!class_string_filter.IsEmpty());
      this->InvalidateData(PickerInvalidation::Class);
      break;
 
    case WID_PW_TYPE_FILTER:
      this->type_string_filter.SetFilterTerm(this->type_editbox.text.GetText());
      if (!type_string_filter.IsEmpty()) {
        this->type_string_filter.btf.emplace(this->type_string_filter, this->callbacks.GetFeature());
      } else {
        this->type_string_filter.btf.reset();
      }
      this->InvalidateData({PickerInvalidation::Type, PickerInvalidation::Filter, PickerInvalidation::Position});
      break;
 
    default:
      break;
  }
}

void PickerWindow::BuildPickerClassList()
{
  if (!this->classes.NeedRebuild()) return;
 
  int count = this->callbacks.GetClassCount();
 
  this->classes.clear();
  this->classes.reserve(count);
 
  bool filter_used = this->callbacks.mode.Test(PickerFilterMode::Used);
  bool filter_saved = this->callbacks.mode.Test(PickerFilterMode::Saved);
  for (int i = 0; i < count; i++) {
    if (this->callbacks.GetClassName(i) == INVALID_STRING_ID) continue;
    if (filter_used && std::none_of(std::begin(this->callbacks.used), std::end(this->callbacks.used), [i](const PickerItem &item) { return item.class_index == i; })) continue;
    if (filter_saved && this->callbacks.saved.find(this->callbacks.sel_collection) == this->callbacks.saved.end()) continue;
    if (filter_saved && std::none_of(std::begin(this->callbacks.saved.at(this->callbacks.sel_collection)), std::end(this->callbacks.saved.at(this->callbacks.sel_collection)), [i](const PickerItem &item) { return item.class_index == i; })) continue;
    this->classes.emplace_back(i);
  }
 
  this->classes.Filter(this->class_string_filter);
  this->classes.RebuildDone();
  this->classes.Sort();
 
  if (!this->has_class_picker) return;
  this->GetScrollbar(WID_PW_CLASS_SCROLL)->SetCount(this->classes.size());
}
 
void PickerWindow::EnsureSelectedClassIsValid()
{
  int class_index = this->callbacks.GetSelectedClass();
  if (std::binary_search(std::begin(this->classes), std::end(this->classes), class_index)) return;
 
  if (!this->classes.empty()) {
    class_index = this->classes.front();
  } else {
    /* Classes can be empty if filters are enabled, find the first usable class. */
    int count = this->callbacks.GetClassCount();
    for (int i = 0; i < count; i++) {
      if (this->callbacks.GetClassName(i) == INVALID_STRING_ID) continue;
      class_index = i;
      break;
    }
  }
 
  this->callbacks.SetSelectedClass(class_index);
  this->types.ForceRebuild();
}
 
void PickerWindow::EnsureSelectedClassIsVisible()
{
  if (!this->has_class_picker) return;
  if (this->classes.empty()) return;
 
  auto it = std::ranges::find(this->classes, this->callbacks.GetSelectedClass());
  if (it == std::end(this->classes)) return;
 
  int pos = static_cast<int>(std::distance(std::begin(this->classes), it));
  this->GetScrollbar(WID_PW_CLASS_SCROLL)->ScrollTowards(pos);
}
 
void PickerWindow::RefreshUsedTypeList()
{
  if (!this->has_type_picker) return;
 
  this->callbacks.used.clear();
  this->callbacks.FillUsedItems(this->callbacks.used);
  this->InvalidateData(PickerInvalidation::Type);
}

void PickerWindow::BuildPickerTypeList()
{
  if (!this->types.NeedRebuild()) return;
 
  this->types.clear();
 
  bool show_all = this->callbacks.mode.Test(PickerFilterMode::All);
  bool filter_used = this->callbacks.mode.Test(PickerFilterMode::Used);
  bool filter_saved = this->callbacks.mode.Test(PickerFilterMode::Saved);
  int cls_id = this->callbacks.GetSelectedClass();
 
  if (filter_used) {
    /* Showing used items. May also be filtered by saved items. */
    this->types.reserve(this->callbacks.used.size());
    for (const PickerItem &item : this->callbacks.used) {
      if (!show_all && item.class_index != cls_id) continue;
      if (this->callbacks.GetTypeName(item.class_index, item.index) == INVALID_STRING_ID) continue;
      this->types.emplace_back(item);
    }
  } else if (filter_saved && this->callbacks.saved.contains(this->callbacks.sel_collection)) {
    /* Showing only saved items. */
    this->types.reserve(std::size(this->callbacks.saved.at(this->callbacks.sel_collection)));
    for (const PickerItem &item : this->callbacks.saved.at(this->callbacks.sel_collection)) {
      /* The used list may contain items that aren't currently loaded, skip these. */
      if (item.class_index == -1) continue;
      if (!show_all && item.class_index != cls_id) continue;
      if (this->callbacks.GetTypeName(item.class_index, item.index) == INVALID_STRING_ID) continue;
      this->types.emplace_back(item);
    }
  } else if (show_all) {
    /* Reserve enough space for everything. */
    int total = 0;
    for (int class_index : this->classes) total += this->callbacks.GetTypeCount(class_index);
    this->types.reserve(total);
    /* Add types in all classes. */
    for (int class_index : this->classes) {
      int count = this->callbacks.GetTypeCount(class_index);
      for (int i = 0; i < count; i++) {
        if (this->callbacks.GetTypeName(class_index, i) == INVALID_STRING_ID) continue;
        this->types.emplace_back(this->callbacks.GetPickerItem(class_index, i));
      }
    }
  } else {
    /* Add types in only the selected class. */
    if (cls_id >= 0 && cls_id < this->callbacks.GetClassCount()) {
      int count = this->callbacks.GetTypeCount(cls_id);
      this->types.reserve(count);
      for (int i = 0; i < count; i++) {
        if (this->callbacks.GetTypeName(cls_id, i) == INVALID_STRING_ID) continue;
        this->types.emplace_back(this->callbacks.GetPickerItem(cls_id, i));
      }
    }
  }
 
  this->types.Filter(this->type_string_filter);
  this->types.RebuildDone();
  this->types.Sort();
 
  if (!this->has_type_picker) return;
  this->GetWidget<NWidgetMatrix>(WID_PW_TYPE_MATRIX)->SetCount(static_cast<int>(this->types.size()));
}
 
void PickerWindow::EnsureSelectedTypeIsValid()
{
  int class_index = this->callbacks.GetSelectedClass();
  int index = this->callbacks.GetSelectedType();
  if (std::any_of(std::begin(this->types), std::end(this->types), [class_index, index](const auto &item) { return item.class_index == class_index && item.index == index; })) return;
 
  if (!this->types.empty()) {
    class_index = this->types.front().class_index;
    index = this->types.front().index;
  } else {
    /* Types can be empty if filters are enabled, find the first usable type. */
    int count = this->callbacks.GetTypeCount(class_index);
    for (int i = 0; i < count; i++) {
      if (this->callbacks.GetTypeName(class_index, i) == INVALID_STRING_ID) continue;
      index = i;
      break;
    }
  }
  this->callbacks.SetSelectedClass(class_index);
  this->callbacks.SetSelectedType(index);
}
 
void PickerWindow::EnsureSelectedTypeIsVisible()
{
  if (!this->has_type_picker) return;
  if (this->types.empty()) {
    this->GetWidget<NWidgetMatrix>(WID_PW_TYPE_MATRIX)->SetClicked(-1);
    return;
  }
 
  int class_index = this->callbacks.GetSelectedClass();
  int index = this->callbacks.GetSelectedType();
 
  auto it = std::ranges::find_if(this->types, [class_index, index](const auto &item) { return item.class_index == class_index && item.index == index; });
  int pos = -1;
  if (it != std::end(this->types)) {
    pos = static_cast<int>(std::distance(std::begin(this->types), it));
  }
 
  this->GetWidget<NWidgetMatrix>(WID_PW_TYPE_MATRIX)->SetClicked(pos);
}

void PickerWindow::BuildPickerCollectionList()
{
  if (!this->collections.NeedRebuild()) return;
 
  int count = std::max(static_cast<int>(this->callbacks.saved.size()), 1);
 
  this->collections.clear();
  this->collections.reserve(count);
 
  if (this->callbacks.saved.find("") == this->callbacks.saved.end()) {
    this->collections.emplace_back("");
  }
 
  for (auto it = this->callbacks.saved.begin(); it != this->callbacks.saved.end(); it++) {
    this->collections.emplace_back(it->first);
  }
 
  this->collections.RebuildDone();
  this->collections.Sort();
 
  if (!this->has_class_picker) return;
}

std::unique_ptr<NWidgetBase> MakePickerClassWidgets()
{
  static constexpr std::initializer_list<NWidgetPart> picker_class_widgets = {
    NWidget(NWID_SELECTION, Colours::Invalid, WID_PW_CLASS_SEL),
      NWidget(NWID_VERTICAL),
        NWidget(WWT_PANEL, Colours::DarkGreen),
          NWidget(WWT_EDITBOX, Colours::DarkGreen, WID_PW_CLASS_FILTER), SetMinimalSize(144, 0), SetPadding(2), SetFill(1, 0), SetStringTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
        EndContainer(),
        /* Collection view */
        NWidget(NWID_VERTICAL),
          NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
            NWidget(WWT_PUSHTXTBTN, Colours::DarkGreen, WID_PW_COLEC_ADD), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_COLLECTION_ADD, STR_PICKER_COLLECTION_ADD_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, Colours::DarkGreen, WID_PW_COLEC_RENAME), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_COLLECTION_RENAME, STR_PICKER_COLLECTION_RENAME_TOOLTIP),
            NWidget(WWT_PUSHTXTBTN, Colours::DarkGreen, WID_PW_COLEC_DELETE), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_COLLECTION_DELETE, STR_PICKER_COLLECTION_DELETE_TOOLTIP),
          EndContainer(),
          NWidget(WWT_DROPDOWN, Colours::DarkGreen, WID_PW_COLEC_LIST), SetMinimalSize(144, 12), SetFill(0, 1), SetResize(1, 0), SetToolTip(STR_PICKER_SELECT_COLLECTION_TOOLTIP),
        EndContainer(),
        /* Class view */
        NWidget(NWID_VERTICAL),
          NWidget(NWID_HORIZONTAL),
            NWidget(WWT_PANEL, Colours::DarkGreen),
              NWidget(WWT_MATRIX, Colours::Grey, WID_PW_CLASS_LIST), SetFill(1, 1), SetResize(1, 1), SetPadding(WidgetDimensions::unscaled.picker),
                  SetMatrixDataTip(1, 0), SetScrollbar(WID_PW_CLASS_SCROLL),
            EndContainer(),
            NWidget(NWID_VSCROLLBAR, Colours::DarkGreen, WID_PW_CLASS_SCROLL),
          EndContainer(),
        EndContainer(),
      EndContainer(),
    EndContainer(),
  };
 
  return MakeNWidgets(picker_class_widgets, nullptr);
}

std::unique_ptr<NWidgetBase> MakePickerTypeWidgets()
{
  static constexpr std::initializer_list<NWidgetPart> picker_type_widgets = {
    NWidget(NWID_SELECTION, Colours::Invalid, WID_PW_TYPE_SEL),
      NWidget(NWID_VERTICAL),
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_PANEL, Colours::DarkGreen),
            NWidget(WWT_EDITBOX, Colours::DarkGreen, WID_PW_TYPE_FILTER), SetPadding(2), SetResize(1, 0), SetFill(1, 0), SetStringTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
          EndContainer(),
          NWidget(WWT_IMGBTN, Colours::DarkGreen, WID_PW_CONFIGURE_BADGES), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetResize(0, 0), SetFill(0, 1), SetSpriteTip(SPR_EXTRA_MENU, STR_BADGE_CONFIG_MENU_TOOLTIP),
        EndContainer(),
        NWidget(NWID_VERTICAL, NWidContainerFlag{}, WID_PW_BADGE_FILTER),
      EndContainer(),
        NWidget(NWID_HORIZONTAL, NWidContainerFlag::EqualSize),
          NWidget(WWT_TEXTBTN, Colours::DarkGreen, WID_PW_MODE_ALL), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_MODE_ALL, STR_PICKER_MODE_ALL_TOOLTIP),
          NWidget(WWT_TEXTBTN, Colours::DarkGreen, WID_PW_MODE_USED), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_MODE_USED, STR_PICKER_MODE_USED_TOOLTIP),
          NWidget(WWT_TEXTBTN, Colours::DarkGreen, WID_PW_MODE_SAVED), SetFill(1, 0), SetResize(1, 0), SetStringTip(STR_PICKER_MODE_SAVED, STR_PICKER_MODE_SAVED_TOOLTIP),
          NWidget(WWT_PUSHTXTBTN, Colours::DarkGreen, WID_PW_SHRINK), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetStringTip(STR_PICKER_PREVIEW_SHRINK, STR_PICKER_PREVIEW_SHRINK_TOOLTIP),
          NWidget(WWT_PUSHTXTBTN, Colours::DarkGreen, WID_PW_EXPAND), SetAspect(WidgetDimensions::ASPECT_UP_DOWN_BUTTON), SetStringTip(STR_PICKER_PREVIEW_EXPAND, STR_PICKER_PREVIEW_EXPAND_TOOLTIP),
        EndContainer(),
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_PANEL, Colours::DarkGreen), SetScrollbar(WID_PW_TYPE_SCROLL),
            NWidget(NWID_MATRIX, Colours::DarkGreen, WID_PW_TYPE_MATRIX), SetPIP(0, 2, 0), SetPadding(WidgetDimensions::unscaled.picker),
              NWidget(WWT_PANEL, Colours::Grey, WID_PW_TYPE_ITEM), SetScrollbar(WID_PW_TYPE_SCROLL),
              EndContainer(),
            EndContainer(),
          EndContainer(),
          NWidget(NWID_VSCROLLBAR, Colours::DarkGreen, WID_PW_TYPE_SCROLL),
        EndContainer(),
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_PANEL, Colours::DarkGreen),
            NWidget(WWT_EMPTY, Colours::Invalid, WID_PW_TYPE_NAME), SetPadding(WidgetDimensions::unscaled.framerect), SetResize(1, 0), SetFill(1, 0), SetMinimalTextLines(1, 0),
          EndContainer(),
          NWidget(WWT_RESIZEBOX, Colours::DarkGreen, WID_PW_TYPE_RESIZE),
        EndContainer(),
      EndContainer(),
    EndContainer(),
  };
 
  return MakeNWidgets(picker_type_widgets, nullptr);
}
 
void InvalidateAllPickerWindows()
{
  InvalidateWindowClassesData(WindowClass::BuildBusStation, PickerWindow::PICKER_INVALIDATION_ALL);
  InvalidateWindowClassesData(WindowClass::BuildTruckStation, PickerWindow::PICKER_INVALIDATION_ALL);
  InvalidateWindowClassesData(WindowClass::JoinStation, PickerWindow::PICKER_INVALIDATION_ALL);
  InvalidateWindowClassesData(WindowClass::BuildWaypoint, PickerWindow::PICKER_INVALIDATION_ALL);
  InvalidateWindowClassesData(WindowClass::BuildObject, PickerWindow::PICKER_INVALIDATION_ALL);
  InvalidateWindowClassesData(WindowClass::BuildHouse, PickerWindow::PICKER_INVALIDATION_ALL);
}