industry_gui.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "stdafx.h"
#include "error.h"
#include "gui.h"
#include "settings_gui.h"
#include "sound_func.h"
#include "window_func.h"
#include "textbuf_gui.h"
#include "command_func.h"
#include "viewport_func.h"
#include "industry.h"
#include "town.h"
#include "cheat_type.h"
#include "newgrf_industries.h"
#include "newgrf_text.h"
#include "newgrf_debug.h"
#include "network/network.h"
#include "strings_func.h"
#include "company_func.h"
#include "tilehighlight_func.h"
#include "string_func.h"
#include "sortlist_type.h"
#include "widgets/dropdown_func.h"
#include "company_base.h"
#include "core/geometry_func.hpp"
#include "core/random_func.hpp"
#include "core/backup_type.hpp"
#include "genworld.h"
#include "smallmap_gui.h"
#include "widgets/dropdown_type.h"
#include "widgets/industry_widget.h"
#include "clear_map.h"
#include "zoom_func.h"
 
#include "table/strings.h"
 
#include <bitset>
 
#include "safeguards.h"
 
bool _ignore_restrictions;
std::bitset<NUM_INDUSTRYTYPES> _displayed_industries; 
 
enum CargoSuffixType {
  CST_FUND,  
  CST_VIEW,  
  CST_DIR,   
};
 
enum CargoSuffixDisplay {
  CSD_CARGO,             
  CSD_CARGO_AMOUNT,      
  CSD_CARGO_TEXT,        
  CSD_CARGO_AMOUNT_TEXT, 
};
 
struct CargoSuffix {
  CargoSuffixDisplay display; 
  char text[512];             
};
 
static void ShowIndustryCargoesWindow(IndustryType id);
 
static void GetCargoSuffix(uint cargo, CargoSuffixType cst, const Industry *ind, IndustryType ind_type, const IndustrySpec *indspec, CargoSuffix &suffix)
{
  suffix.text[0] = '\0';
  suffix.display = CSD_CARGO_AMOUNT;
 
  if (HasBit(indspec->callback_mask, CBM_IND_CARGO_SUFFIX)) {
    TileIndex t = (cst != CST_FUND) ? ind->location.tile : INVALID_TILE;
    uint16 callback = GetIndustryCallback(CBID_INDUSTRY_CARGO_SUFFIX, 0, (cst << 8) | cargo, const_cast<Industry *>(ind), ind_type, t);
    if (callback == CALLBACK_FAILED) return;
 
    if (indspec->grf_prop.grffile->grf_version < 8) {
      if (GB(callback, 0, 8) == 0xFF) return;
      if (callback < 0x400) {
        StartTextRefStackUsage(indspec->grf_prop.grffile, 6);
        GetString(suffix.text, GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + callback), lastof(suffix.text));
        StopTextRefStackUsage();
        suffix.display = CSD_CARGO_AMOUNT_TEXT;
        return;
      }
      ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_CARGO_SUFFIX, callback);
      return;
 
    } else { // GRF version 8 or higher.
      if (callback == 0x400) return;
      if (callback == 0x401) {
        suffix.display = CSD_CARGO;
        return;
      }
      if (callback < 0x400) {
        StartTextRefStackUsage(indspec->grf_prop.grffile, 6);
        GetString(suffix.text, GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + callback), lastof(suffix.text));
        StopTextRefStackUsage();
        suffix.display = CSD_CARGO_AMOUNT_TEXT;
        return;
      }
      if (callback >= 0x800 && callback < 0xC00) {
        StartTextRefStackUsage(indspec->grf_prop.grffile, 6);
        GetString(suffix.text, GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 - 0x800 + callback), lastof(suffix.text));
        StopTextRefStackUsage();
        suffix.display = CSD_CARGO_TEXT;
        return;
      }
      ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_CARGO_SUFFIX, callback);
      return;
    }
  }
}
 
enum CargoSuffixInOut {
  CARGOSUFFIX_OUT = 0,
  CARGOSUFFIX_IN  = 1,
};
 
template <typename TC, typename TS>
static inline void GetAllCargoSuffixes(CargoSuffixInOut use_input, CargoSuffixType cst, const Industry *ind, IndustryType ind_type, const IndustrySpec *indspec, const TC &cargoes, TS &suffixes)
{
  static_assert(lengthof(cargoes) <= lengthof(suffixes));
 
  if (indspec->behaviour & INDUSTRYBEH_CARGOTYPES_UNLIMITED) {
    /* Reworked behaviour with new many-in-many-out scheme */
    for (uint j = 0; j < lengthof(suffixes); j++) {
      if (cargoes[j] != CT_INVALID) {
        byte local_id = indspec->grf_prop.grffile->cargo_map[cargoes[j]]; // should we check the value for valid?
        uint cargotype = local_id << 16 | use_input;
        GetCargoSuffix(cargotype, cst, ind, ind_type, indspec, suffixes[j]);
      } else {
        suffixes[j].text[0] = '\0';
        suffixes[j].display = CSD_CARGO;
      }
    }
  } else {
    /* Compatible behaviour with old 3-in-2-out scheme */
    for (uint j = 0; j < lengthof(suffixes); j++) {
      suffixes[j].text[0] = '\0';
      suffixes[j].display = CSD_CARGO;
    }
    switch (use_input) {
      case CARGOSUFFIX_OUT:
        if (cargoes[0] != CT_INVALID) GetCargoSuffix(3, cst, ind, ind_type, indspec, suffixes[0]);
        if (cargoes[1] != CT_INVALID) GetCargoSuffix(4, cst, ind, ind_type, indspec, suffixes[1]);
        break;
      case CARGOSUFFIX_IN:
        if (cargoes[0] != CT_INVALID) GetCargoSuffix(0, cst, ind, ind_type, indspec, suffixes[0]);
        if (cargoes[1] != CT_INVALID) GetCargoSuffix(1, cst, ind, ind_type, indspec, suffixes[1]);
        if (cargoes[2] != CT_INVALID) GetCargoSuffix(2, cst, ind, ind_type, indspec, suffixes[2]);
        break;
      default:
        NOT_REACHED();
    }
  }
}
 
std::array<IndustryType, NUM_INDUSTRYTYPES> _sorted_industry_types; 
 
static bool IndustryTypeNameSorter(const IndustryType &a, const IndustryType &b)
{
  static char industry_name[2][64];
 
  const IndustrySpec *indsp1 = GetIndustrySpec(a);
  GetString(industry_name[0], indsp1->name, lastof(industry_name[0]));
 
  const IndustrySpec *indsp2 = GetIndustrySpec(b);
  GetString(industry_name[1], indsp2->name, lastof(industry_name[1]));
 
  int r = strnatcmp(industry_name[0], industry_name[1]); // Sort by name (natural sorting).
 
  /* If the names are equal, sort by industry type. */
  return (r != 0) ? r < 0 : (a < b);
}
 
void SortIndustryTypes()
{
  /* Add each industry type to the list. */
  for (IndustryType i = 0; i < NUM_INDUSTRYTYPES; i++) {
    _sorted_industry_types[i] = i;
  }
 
  /* Sort industry types by name. */
  std::sort(_sorted_industry_types.begin(), _sorted_industry_types.end(), IndustryTypeNameSorter);
}
 
void CcBuildIndustry(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2, uint32 cmd)
{
  if (result.Succeeded()) return;
 
  uint8 indtype = GB(p1, 0, 8);
  if (indtype < NUM_INDUSTRYTYPES) {
    const IndustrySpec *indsp = GetIndustrySpec(indtype);
    if (indsp->enabled) {
      SetDParam(0, indsp->name);
      ShowErrorMessage(STR_ERROR_CAN_T_BUILD_HERE, result.GetErrorMessage(), WL_INFO, TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE);
    }
  }
}
 
static const NWidgetPart _nested_build_industry_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    NWidget(WWT_CAPTION, COLOUR_DARK_GREEN), SetDataTip(STR_FUND_INDUSTRY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_DARK_GREEN),
    NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
  EndContainer(),
  NWidget(NWID_SELECTION, COLOUR_DARK_GREEN, WID_DPI_SCENARIO_EDITOR_PANE),
    NWidget(NWID_VERTICAL),
      NWidget(WWT_TEXTBTN, COLOUR_DARK_GREEN, WID_DPI_CREATE_RANDOM_INDUSTRIES_WIDGET), SetMinimalSize(0, 12), SetFill(1, 0), SetResize(1, 0),
          SetDataTip(STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES, STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES_TOOLTIP),
      NWidget(WWT_TEXTBTN, COLOUR_DARK_GREEN, WID_DPI_REMOVE_ALL_INDUSTRIES_WIDGET), SetMinimalSize(0, 12), SetFill(1, 0), SetResize(1, 0),
          SetDataTip(STR_FUND_INDUSTRY_REMOVE_ALL_INDUSTRIES, STR_FUND_INDUSTRY_REMOVE_ALL_INDUSTRIES_TOOLTIP),
    EndContainer(),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_MATRIX, COLOUR_DARK_GREEN, WID_DPI_MATRIX_WIDGET), SetMatrixDataTip(1, 0, STR_FUND_INDUSTRY_SELECTION_TOOLTIP), SetFill(1, 0), SetResize(1, 1), SetScrollbar(WID_DPI_SCROLLBAR),
    NWidget(NWID_VSCROLLBAR, COLOUR_DARK_GREEN, WID_DPI_SCROLLBAR),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_DPI_INFOPANEL), SetResize(1, 0),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_TEXTBTN, COLOUR_DARK_GREEN, WID_DPI_DISPLAY_WIDGET), SetFill(1, 0), SetResize(1, 0),
        SetDataTip(STR_INDUSTRY_DISPLAY_CHAIN, STR_INDUSTRY_DISPLAY_CHAIN_TOOLTIP),
    NWidget(WWT_TEXTBTN, COLOUR_DARK_GREEN, WID_DPI_FUND_WIDGET), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_JUST_STRING, STR_NULL),
    NWidget(WWT_RESIZEBOX, COLOUR_DARK_GREEN),
  EndContainer(),
};
 
static WindowDesc _build_industry_desc(
  WDP_AUTO, "build_industry", 170, 212,
  WC_BUILD_INDUSTRY, WC_NONE,
  WDF_CONSTRUCTION,
  _nested_build_industry_widgets, lengthof(_nested_build_industry_widgets)
);
 
class BuildIndustryWindow : public Window {
  int selected_index;                         
  IndustryType selected_type;                 
  uint16 count;                               
  IndustryType index[NUM_INDUSTRYTYPES + 1];  
  bool enabled[NUM_INDUSTRYTYPES + 1];        
  Scrollbar *vscroll;
  Dimension legend;                           
 
  static const int MAX_MINWIDTH_LINEHEIGHTS = 20;
 
  void SetupArrays()
  {
    this->count = 0;
 
    for (uint i = 0; i < lengthof(this->index); i++) {
      this->index[i]   = INVALID_INDUSTRYTYPE;
      this->enabled[i] = false;
    }
 
    /* Fill the arrays with industries.
     * The tests performed after the enabled allow to load the industries
     * In the same way they are inserted by grf (if any)
     */
    for (IndustryType ind : _sorted_industry_types) {
      const IndustrySpec *indsp = GetIndustrySpec(ind);
      if (indsp->enabled) {
        /* Rule is that editor mode loads all industries.
         * In game mode, all non raw industries are loaded too
         * and raw ones are loaded only when setting allows it */
        if (_game_mode != GM_EDITOR && indsp->IsRawIndustry() && _settings_game.construction.raw_industry_construction == 0) {
          /* Unselect if the industry is no longer in the list */
          if (this->selected_type == ind) this->selected_index = -1;
          continue;
        }
        this->index[this->count] = ind;
        this->enabled[this->count] = (_game_mode == GM_EDITOR) || GetIndustryProbabilityCallback(ind, IACT_USERCREATION, 1) > 0;
        /* Keep the selection to the correct line */
        if (this->selected_type == ind) this->selected_index = this->count;
        this->count++;
      }
    }
 
    /* first industry type is selected if the current selection is invalid.
     * I'll be damned if there are none available ;) */
    if (this->selected_index == -1) {
      this->selected_index = 0;
      this->selected_type = this->index[0];
    }
 
    this->vscroll->SetCount(this->count);
  }
 
  void SetButtons()
  {
    this->SetWidgetDisabledState(WID_DPI_FUND_WIDGET, this->selected_type != INVALID_INDUSTRYTYPE && !this->enabled[this->selected_index]);
    this->SetWidgetDisabledState(WID_DPI_DISPLAY_WIDGET, this->selected_type == INVALID_INDUSTRYTYPE && this->enabled[this->selected_index]);
  }
 
  std::string MakeCargoListString(const CargoID *cargolist, const CargoSuffix *cargo_suffix, int cargolistlen, StringID prefixstr) const
  {
    std::string cargostring;
    char buf[1024];
    int numcargo = 0;
    int firstcargo = -1;
 
    for (int j = 0; j < cargolistlen; j++) {
      if (cargolist[j] == CT_INVALID) continue;
      numcargo++;
      if (firstcargo < 0) {
        firstcargo = j;
        continue;
      }
      SetDParam(0, CargoSpec::Get(cargolist[j])->name);
      SetDParamStr(1, cargo_suffix[j].text);
      GetString(buf, STR_INDUSTRY_VIEW_CARGO_LIST_EXTENSION, lastof(buf));
      cargostring += buf;
    }
 
    if (numcargo > 0) {
      SetDParam(0, CargoSpec::Get(cargolist[firstcargo])->name);
      SetDParamStr(1, cargo_suffix[firstcargo].text);
      GetString(buf, prefixstr, lastof(buf));
      cargostring = std::string(buf) + cargostring;
    } else {
      SetDParam(0, STR_JUST_NOTHING);
      SetDParamStr(1, "");
      GetString(buf, prefixstr, lastof(buf));
      cargostring = std::string(buf);
    }
 
    return cargostring;
  }
 
public:
  BuildIndustryWindow() : Window(&_build_industry_desc)
  {
    this->selected_index = -1;
    this->selected_type = INVALID_INDUSTRYTYPE;
 
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_DPI_SCROLLBAR);
    this->FinishInitNested(0);
 
    this->SetButtons();
 
    /* Show scenario editor tools in editor. */
    if (_game_mode != GM_EDITOR) {
      auto *se_tools = this->GetWidget<NWidgetStacked>(WID_DPI_SCENARIO_EDITOR_PANE);
      se_tools->SetDisplayedPlane(SZSP_HORIZONTAL);
      this->ReInit();
    }
  }
 
  void OnInit() override
  {
    /* Width of the legend blob -- slightly larger than the smallmap legend blob. */
    this->legend.height = FONT_HEIGHT_SMALL;
    this->legend.width = this->legend.height * 8 / 5;
 
    this->SetupArrays();
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_DPI_MATRIX_WIDGET: {
        Dimension d = GetStringBoundingBox(STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES);
        for (uint16 i = 0; i < this->count; i++) {
          if (this->index[i] == INVALID_INDUSTRYTYPE) continue;
          d = maxdim(d, GetStringBoundingBox(GetIndustrySpec(this->index[i])->name));
        }
        resize->height = std::max<uint>(this->legend.height, FONT_HEIGHT_NORMAL) + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
        d.width += this->legend.width + ScaleFontTrad(7) + padding.width;
        d.height = 5 * resize->height;
        *size = maxdim(*size, d);
        break;
      }
 
      case WID_DPI_INFOPANEL: {
        /* Extra line for cost outside of editor. */
        int height = 2 + (_game_mode == GM_EDITOR ? 0 : 1);
        uint extra_lines_req = 0;
        uint extra_lines_prd = 0;
        uint extra_lines_newgrf = 0;
        uint max_minwidth = FONT_HEIGHT_NORMAL * MAX_MINWIDTH_LINEHEIGHTS;
        Dimension d = {0, 0};
        for (uint16 i = 0; i < this->count; i++) {
          if (this->index[i] == INVALID_INDUSTRYTYPE) continue;
 
          const IndustrySpec *indsp = GetIndustrySpec(this->index[i]);
          CargoSuffix cargo_suffix[lengthof(indsp->accepts_cargo)];
 
          /* Measure the accepted cargoes, if any. */
          GetAllCargoSuffixes(CARGOSUFFIX_IN, CST_FUND, nullptr, this->index[i], indsp, indsp->accepts_cargo, cargo_suffix);
          std::string cargostring = this->MakeCargoListString(indsp->accepts_cargo, cargo_suffix, lengthof(indsp->accepts_cargo), STR_INDUSTRY_VIEW_REQUIRES_N_CARGO);
          Dimension strdim = GetStringBoundingBox(cargostring.c_str());
          if (strdim.width > max_minwidth) {
            extra_lines_req = std::max(extra_lines_req, strdim.width / max_minwidth + 1);
            strdim.width = max_minwidth;
          }
          d = maxdim(d, strdim);
 
          /* Measure the produced cargoes, if any. */
          GetAllCargoSuffixes(CARGOSUFFIX_OUT, CST_FUND, nullptr, this->index[i], indsp, indsp->produced_cargo, cargo_suffix);
          cargostring = this->MakeCargoListString(indsp->produced_cargo, cargo_suffix, lengthof(indsp->produced_cargo), STR_INDUSTRY_VIEW_PRODUCES_N_CARGO);
          strdim = GetStringBoundingBox(cargostring.c_str());
          if (strdim.width > max_minwidth) {
            extra_lines_prd = std::max(extra_lines_prd, strdim.width / max_minwidth + 1);
            strdim.width = max_minwidth;
          }
          d = maxdim(d, strdim);
 
          if (indsp->grf_prop.grffile != nullptr) {
            /* Reserve a few extra lines for text from an industry NewGRF. */
            extra_lines_newgrf = 4;
          }
        }
 
        /* Set it to something more sane :) */
        height += extra_lines_prd + extra_lines_req + extra_lines_newgrf;
        size->height = height * FONT_HEIGHT_NORMAL + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
        size->width  = d.width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        break;
      }
 
      case WID_DPI_FUND_WIDGET: {
        Dimension d = GetStringBoundingBox(STR_FUND_INDUSTRY_BUILD_NEW_INDUSTRY);
        d = maxdim(d, GetStringBoundingBox(STR_FUND_INDUSTRY_PROSPECT_NEW_INDUSTRY));
        d = maxdim(d, GetStringBoundingBox(STR_FUND_INDUSTRY_FUND_NEW_INDUSTRY));
        d.width += padding.width;
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
    }
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_DPI_FUND_WIDGET:
        /* Raw industries might be prospected. Show this fact by changing the string
         * In Editor, you just build, while ingame, or you fund or you prospect */
        if (_game_mode == GM_EDITOR) {
          /* We've chosen many random industries but no industries have been specified */
          SetDParam(0, STR_FUND_INDUSTRY_BUILD_NEW_INDUSTRY);
        } else {
          const IndustrySpec *indsp = GetIndustrySpec(this->index[this->selected_index]);
          SetDParam(0, (_settings_game.construction.raw_industry_construction == 2 && indsp->IsRawIndustry()) ? STR_FUND_INDUSTRY_PROSPECT_NEW_INDUSTRY : STR_FUND_INDUSTRY_FUND_NEW_INDUSTRY);
        }
        break;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_DPI_MATRIX_WIDGET: {
        uint text_left, text_right, icon_left, icon_right;
        if (_current_text_dir == TD_RTL) {
          icon_right = r.right    - WD_MATRIX_RIGHT;
          icon_left  = icon_right - this->legend.width;
          text_right = icon_left  - ScaleFontTrad(7);
          text_left  = r.left     + WD_MATRIX_LEFT;
        } else {
          icon_left  = r.left     + WD_MATRIX_LEFT;
          icon_right = icon_left  + this->legend.width;
          text_left  = icon_right + ScaleFontTrad(7);
          text_right = r.right    - WD_MATRIX_RIGHT;
        }
 
        /* Vertical offset for legend icon. */
        int icon_top    = (this->resize.step_height - this->legend.height + 1) / 2;
        int icon_bottom = icon_top + this->legend.height;
 
        int y = r.top;
        for (uint16 i = 0; i < this->vscroll->GetCapacity() && i + this->vscroll->GetPosition() < this->count; i++) {
          bool selected = this->selected_index == i + this->vscroll->GetPosition();
 
          if (this->index[i + this->vscroll->GetPosition()] == INVALID_INDUSTRYTYPE) {
            DrawString(text_left, text_right, y + WD_MATRIX_TOP, STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES, selected ? TC_WHITE : TC_ORANGE);
            y += this->resize.step_height;
            continue;
          }
          const IndustrySpec *indsp = GetIndustrySpec(this->index[i + this->vscroll->GetPosition()]);
 
          /* Draw the name of the industry in white is selected, otherwise, in orange */
          DrawString(text_left, text_right, y + WD_MATRIX_TOP, indsp->name, selected ? TC_WHITE : TC_ORANGE);
          GfxFillRect(icon_left,     y + icon_top,     icon_right,     y + icon_bottom,     selected ? PC_WHITE : PC_BLACK);
          GfxFillRect(icon_left + 1, y + icon_top + 1, icon_right - 1, y + icon_bottom - 1, indsp->map_colour);
 
          y += this->resize.step_height;
        }
        break;
      }
 
      case WID_DPI_INFOPANEL: {
        int y      = r.top    + WD_FRAMERECT_TOP;
        int bottom = r.bottom - WD_FRAMERECT_BOTTOM;
        int left   = r.left   + WD_FRAMERECT_LEFT;
        int right  = r.right  - WD_FRAMERECT_RIGHT;
 
        if (this->selected_type == INVALID_INDUSTRYTYPE) {
          DrawStringMultiLine(left, right, y,  bottom, STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES_TOOLTIP);
          break;
        }
 
        const IndustrySpec *indsp = GetIndustrySpec(this->selected_type);
 
        if (_game_mode != GM_EDITOR) {
          SetDParam(0, indsp->GetConstructionCost());
          DrawString(left, right, y, STR_FUND_INDUSTRY_INDUSTRY_BUILD_COST);
          y += FONT_HEIGHT_NORMAL;
        }
 
        CargoSuffix cargo_suffix[lengthof(indsp->accepts_cargo)];
 
        /* Draw the accepted cargoes, if any. Otherwise, will print "Nothing". */
        GetAllCargoSuffixes(CARGOSUFFIX_IN, CST_FUND, nullptr, this->selected_type, indsp, indsp->accepts_cargo, cargo_suffix);
        std::string cargostring = this->MakeCargoListString(indsp->accepts_cargo, cargo_suffix, lengthof(indsp->accepts_cargo), STR_INDUSTRY_VIEW_REQUIRES_N_CARGO);
        y = DrawStringMultiLine(left, right, y, bottom, cargostring);
 
        /* Draw the produced cargoes, if any. Otherwise, will print "Nothing". */
        GetAllCargoSuffixes(CARGOSUFFIX_OUT, CST_FUND, nullptr, this->selected_type, indsp, indsp->produced_cargo, cargo_suffix);
        cargostring = this->MakeCargoListString(indsp->produced_cargo, cargo_suffix, lengthof(indsp->produced_cargo), STR_INDUSTRY_VIEW_PRODUCES_N_CARGO);
        y = DrawStringMultiLine(left, right, y, bottom, cargostring);
 
        /* Get the additional purchase info text, if it has not already been queried. */
        if (HasBit(indsp->callback_mask, CBM_IND_FUND_MORE_TEXT)) {
          uint16 callback_res = GetIndustryCallback(CBID_INDUSTRY_FUND_MORE_TEXT, 0, 0, nullptr, this->selected_type, INVALID_TILE);
          if (callback_res != CALLBACK_FAILED && callback_res != 0x400) {
            if (callback_res > 0x400) {
              ErrorUnknownCallbackResult(indsp->grf_prop.grffile->grfid, CBID_INDUSTRY_FUND_MORE_TEXT, callback_res);
            } else {
              StringID str = GetGRFStringID(indsp->grf_prop.grffile->grfid, 0xD000 + callback_res);  // No. here's the new string
              if (str != STR_UNDEFINED) {
                StartTextRefStackUsage(indsp->grf_prop.grffile, 6);
                DrawStringMultiLine(left, right, y, bottom, str, TC_YELLOW);
                StopTextRefStackUsage();
              }
            }
          }
        }
        break;
      }
    }
  }
 
  static void AskManyRandomIndustriesCallback(Window *w, bool confirmed)
  {
    if (!confirmed) return;
 
    if (Town::GetNumItems() == 0) {
      ShowErrorMessage(STR_ERROR_CAN_T_GENERATE_INDUSTRIES, STR_ERROR_MUST_FOUND_TOWN_FIRST, WL_INFO);
    } else {
      extern void GenerateIndustries();
      Backup<bool> old_generating_world(_generating_world, true, FILE_LINE);
      GenerateIndustries();
      old_generating_world.Restore();
    }
  }
 
  static void AskRemoveAllIndustriesCallback(Window *w, bool confirmed)
  {
    if (!confirmed) return;
 
    for (Industry *industry : Industry::Iterate()) delete industry;
 
    /* Clear farmland. */
    for (TileIndex tile = 0; tile < MapSize(); tile++) {
      if (IsTileType(tile, MP_CLEAR) && GetRawClearGround(tile) == CLEAR_FIELDS) {
        MakeClear(tile, CLEAR_GRASS, 3);
      }
    }
 
    MarkWholeScreenDirty();
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_DPI_CREATE_RANDOM_INDUSTRIES_WIDGET: {
        assert(_game_mode == GM_EDITOR);
        this->HandleButtonClick(WID_DPI_CREATE_RANDOM_INDUSTRIES_WIDGET);
        ShowQuery(STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES_CAPTION, STR_FUND_INDUSTRY_MANY_RANDOM_INDUSTRIES_QUERY, nullptr, AskManyRandomIndustriesCallback);
        break;
      }
 
      case WID_DPI_REMOVE_ALL_INDUSTRIES_WIDGET: {
        assert(_game_mode == GM_EDITOR);
        this->HandleButtonClick(WID_DPI_REMOVE_ALL_INDUSTRIES_WIDGET);
        ShowQuery(STR_FUND_INDUSTRY_REMOVE_ALL_INDUSTRIES_CAPTION, STR_FUND_INDUSTRY_REMOVE_ALL_INDUSTRIES_QUERY, nullptr, AskRemoveAllIndustriesCallback);
        break;
      }
 
      case WID_DPI_MATRIX_WIDGET: {
        int y = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_DPI_MATRIX_WIDGET);
        if (y < this->count) { // Is it within the boundaries of available data?
          this->selected_index = y;
          this->selected_type = this->index[y];
          const IndustrySpec *indsp = (this->selected_type == INVALID_INDUSTRYTYPE) ? nullptr : GetIndustrySpec(this->selected_type);
 
          this->SetDirty();
 
          if (_thd.GetCallbackWnd() == this &&
              ((_game_mode != GM_EDITOR && _settings_game.construction.raw_industry_construction == 2 && indsp != nullptr && indsp->IsRawIndustry()) ||
              this->selected_type == INVALID_INDUSTRYTYPE ||
              !this->enabled[this->selected_index])) {
            /* Reset the button state if going to prospecting or "build many industries" */
            this->RaiseButtons();
            ResetObjectToPlace();
          }
 
          this->SetButtons();
          if (this->enabled[this->selected_index] && click_count > 1) this->OnClick(pt, WID_DPI_FUND_WIDGET, 1);
        }
        break;
      }
 
      case WID_DPI_DISPLAY_WIDGET:
        if (this->selected_type != INVALID_INDUSTRYTYPE) ShowIndustryCargoesWindow(this->selected_type);
        break;
 
      case WID_DPI_FUND_WIDGET: {
        if (this->selected_type != INVALID_INDUSTRYTYPE) {
          if (_game_mode != GM_EDITOR && _settings_game.construction.raw_industry_construction == 2 && GetIndustrySpec(this->selected_type)->IsRawIndustry()) {
            DoCommandP(0, this->selected_type, InteractiveRandom(), CMD_BUILD_INDUSTRY | CMD_MSG(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY));
            this->HandleButtonClick(WID_DPI_FUND_WIDGET);
          } else {
            HandlePlacePushButton(this, WID_DPI_FUND_WIDGET, SPR_CURSOR_INDUSTRY, HT_RECT);
          }
        }
        break;
      }
    }
  }
 
  void OnResize() override
  {
    /* Adjust the number of items in the matrix depending of the resize */
    this->vscroll->SetCapacityFromWidget(this, WID_DPI_MATRIX_WIDGET);
  }
 
  void OnPlaceObject(Point pt, TileIndex tile) override
  {
    bool success = true;
    /* We do not need to protect ourselves against "Random Many Industries" in this mode */
    const IndustrySpec *indsp = GetIndustrySpec(this->selected_type);
    uint32 seed = InteractiveRandom();
    uint32 layout_index = InteractiveRandomRange((uint32)indsp->layouts.size());
 
    if (_game_mode == GM_EDITOR) {
      /* Show error if no town exists at all */
      if (Town::GetNumItems() == 0) {
        SetDParam(0, indsp->name);
        ShowErrorMessage(STR_ERROR_CAN_T_BUILD_HERE, STR_ERROR_MUST_FOUND_TOWN_FIRST, WL_INFO, pt.x, pt.y);
        return;
      }
 
      Backup<CompanyID> cur_company(_current_company, OWNER_NONE, FILE_LINE);
      Backup<bool> old_generating_world(_generating_world, true, FILE_LINE);
      _ignore_restrictions = true;
 
      DoCommandP(tile, (layout_index << 8) | this->selected_type, seed,
          CMD_BUILD_INDUSTRY | CMD_MSG(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY), &CcBuildIndustry);
 
      cur_company.Restore();
      old_generating_world.Restore();
      _ignore_restrictions = false;
    } else {
      success = DoCommandP(tile, (layout_index << 8) | this->selected_type, seed, CMD_BUILD_INDUSTRY | CMD_MSG(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY));
    }
 
    /* If an industry has been built, just reset the cursor and the system */
    if (success && !_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
  }
 
  void OnHundredthTick() override
  {
    if (_game_mode == GM_EDITOR) return;
    const IndustrySpec *indsp = GetIndustrySpec(this->selected_type);
 
    if (indsp->enabled) {
      bool call_back_result = GetIndustryProbabilityCallback(this->selected_type, IACT_USERCREATION, 1) > 0;
 
      /* Only if result does match the previous state would it require a redraw. */
      if (call_back_result != this->enabled[this->selected_index]) {
        this->enabled[this->selected_index] = call_back_result;
        this->SetButtons();
        this->SetDirty();
      }
    }
  }
 
  void OnTimeout() override
  {
    this->RaiseButtons();
  }
 
  void OnPlaceObjectAbort() override
  {
    this->RaiseButtons();
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!gui_scope) return;
    this->SetupArrays();
 
    const IndustrySpec *indsp = (this->selected_type == INVALID_INDUSTRYTYPE) ? nullptr : GetIndustrySpec(this->selected_type);
    if (indsp == nullptr) this->enabled[this->selected_index] = _settings_game.difficulty.industry_density != ID_FUND_ONLY;
    this->SetButtons();
    this->SetDirty();
  }
};
 
void ShowBuildIndustryWindow()
{
  if (_game_mode != GM_EDITOR && !Company::IsValidID(_local_company)) return;
  if (BringWindowToFrontById(WC_BUILD_INDUSTRY, 0)) return;
  new BuildIndustryWindow();
}
 
static void UpdateIndustryProduction(Industry *i);
 
static inline bool IsProductionAlterable(const Industry *i)
{
  const IndustrySpec *is = GetIndustrySpec(i->type);
  bool has_prod = false;
  for (size_t j = 0; j < lengthof(is->production_rate); j++) {
    if (is->production_rate[j] != 0) {
      has_prod = true;
      break;
    }
  }
  return ((_game_mode == GM_EDITOR || _cheats.setup_prod.value) &&
      (has_prod || is->IsRawIndustry()) &&
      !_networking);
}
 
class IndustryViewWindow : public Window
{
  enum Editability {
    EA_NONE,              
    EA_MULTIPLIER,        
    EA_RATE,              
  };
 
  enum InfoLine {
    IL_NONE,              
    IL_MULTIPLIER,        
    IL_RATE1,             
    IL_RATE2,             
  };
 
  Editability editable;     
  InfoLine editbox_line;    
  InfoLine clicked_line;    
  byte clicked_button;      
  int production_offset_y;  
  int info_height;          
 
public:
  IndustryViewWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
  {
    this->flags |= WF_DISABLE_VP_SCROLL;
    this->editbox_line = IL_NONE;
    this->clicked_line = IL_NONE;
    this->clicked_button = 0;
    this->info_height = WD_FRAMERECT_TOP + 2 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_BOTTOM + 1; // Info panel has at least two lines text.
 
    this->InitNested(window_number);
    NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_IV_VIEWPORT);
    nvp->InitializeViewport(this, Industry::Get(window_number)->location.GetCenterTile(), ZOOM_LVL_INDUSTRY);
 
    this->InvalidateData();
  }
 
  void OnPaint() override
  {
    this->DrawWidgets();
 
    if (this->IsShaded()) return; // Don't draw anything when the window is shaded.
 
    NWidgetBase *nwi = this->GetWidget<NWidgetBase>(WID_IV_INFO);
    uint expected = this->DrawInfo(nwi->pos_x, nwi->pos_x + nwi->current_x - 1, nwi->pos_y) - nwi->pos_y;
    if (expected > nwi->current_y - 1) {
      this->info_height = expected + 1;
      this->ReInit();
      return;
    }
  }
 
  int DrawInfo(uint left, uint right, uint top)
  {
    Industry *i = Industry::Get(this->window_number);
    const IndustrySpec *ind = GetIndustrySpec(i->type);
    int y = top + WD_FRAMERECT_TOP;
    bool first = true;
    bool has_accept = false;
 
    if (i->prod_level == PRODLEVEL_CLOSURE) {
      DrawString(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_VIEW_INDUSTRY_ANNOUNCED_CLOSURE);
      y += 2 * FONT_HEIGHT_NORMAL;
    }
 
    CargoSuffix cargo_suffix[lengthof(i->accepts_cargo)];
    GetAllCargoSuffixes(CARGOSUFFIX_IN, CST_VIEW, i, i->type, ind, i->accepts_cargo, cargo_suffix);
    bool stockpiling = HasBit(ind->callback_mask, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(ind->callback_mask, CBM_IND_PRODUCTION_256_TICKS);
 
    uint left_side = left + WD_FRAMERECT_LEFT * 4; // Indent accepted cargoes.
    for (byte j = 0; j < lengthof(i->accepts_cargo); j++) {
      if (i->accepts_cargo[j] == CT_INVALID) continue;
      has_accept = true;
      if (first) {
        DrawString(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_VIEW_REQUIRES);
        y += FONT_HEIGHT_NORMAL;
        first = false;
      }
      SetDParam(0, CargoSpec::Get(i->accepts_cargo[j])->name);
      SetDParam(1, i->accepts_cargo[j]);
      SetDParam(2, i->incoming_cargo_waiting[j]);
      SetDParamStr(3, "");
      StringID str = STR_NULL;
      switch (cargo_suffix[j].display) {
        case CSD_CARGO_AMOUNT_TEXT:
          SetDParamStr(3, cargo_suffix[j].text);
          FALLTHROUGH;
        case CSD_CARGO_AMOUNT:
          str = stockpiling ? STR_INDUSTRY_VIEW_ACCEPT_CARGO_AMOUNT : STR_INDUSTRY_VIEW_ACCEPT_CARGO;
          break;
 
        case CSD_CARGO_TEXT:
          SetDParamStr(3, cargo_suffix[j].text);
          FALLTHROUGH;
        case CSD_CARGO:
          str = STR_INDUSTRY_VIEW_ACCEPT_CARGO;
          break;
 
        default:
          NOT_REACHED();
      }
      DrawString(left_side, right - WD_FRAMERECT_RIGHT, y, str);
      y += FONT_HEIGHT_NORMAL;
    }
 
    GetAllCargoSuffixes(CARGOSUFFIX_OUT, CST_VIEW, i, i->type, ind, i->produced_cargo, cargo_suffix);
    first = true;
    for (byte j = 0; j < lengthof(i->produced_cargo); j++) {
      if (i->produced_cargo[j] == CT_INVALID) continue;
      if (first) {
        if (has_accept) y += WD_PAR_VSEP_WIDE;
        DrawString(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_VIEW_PRODUCTION_LAST_MONTH_TITLE);
        y += FONT_HEIGHT_NORMAL;
        if (this->editable == EA_RATE) this->production_offset_y = y;
        first = false;
      }
 
      SetDParam(0, i->produced_cargo[j]);
      SetDParam(1, i->last_month_production[j]);
      SetDParamStr(2, cargo_suffix[j].text);
      SetDParam(3, ToPercent8(i->last_month_pct_transported[j]));
      uint x = left + WD_FRAMETEXT_LEFT + (this->editable == EA_RATE ? SETTING_BUTTON_WIDTH + 10 : 0);
      DrawString(x, right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_VIEW_TRANSPORTED);
      /* Let's put out those buttons.. */
      if (this->editable == EA_RATE) {
        DrawArrowButtons(left + WD_FRAMETEXT_LEFT, y, COLOUR_YELLOW, (this->clicked_line == IL_RATE1 + j) ? this->clicked_button : 0,
            i->production_rate[j] > 0, i->production_rate[j] < 255);
      }
      y += FONT_HEIGHT_NORMAL;
    }
 
    /* Display production multiplier if editable */
    if (this->editable == EA_MULTIPLIER) {
      y += WD_PAR_VSEP_WIDE;
      this->production_offset_y = y;
      SetDParam(0, RoundDivSU(i->prod_level * 100, PRODLEVEL_DEFAULT));
      uint x = left + WD_FRAMETEXT_LEFT + SETTING_BUTTON_WIDTH + 10;
      DrawString(x, right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_VIEW_PRODUCTION_LEVEL);
      DrawArrowButtons(left + WD_FRAMETEXT_LEFT, y, COLOUR_YELLOW, (this->clicked_line == IL_MULTIPLIER) ? this->clicked_button : 0,
          i->prod_level > PRODLEVEL_MINIMUM, i->prod_level < PRODLEVEL_MAXIMUM);
      y += FONT_HEIGHT_NORMAL;
    }
 
    /* Get the extra message for the GUI */
    if (HasBit(ind->callback_mask, CBM_IND_WINDOW_MORE_TEXT)) {
      uint16 callback_res = GetIndustryCallback(CBID_INDUSTRY_WINDOW_MORE_TEXT, 0, 0, i, i->type, i->location.tile);
      if (callback_res != CALLBACK_FAILED && callback_res != 0x400) {
        if (callback_res > 0x400) {
          ErrorUnknownCallbackResult(ind->grf_prop.grffile->grfid, CBID_INDUSTRY_WINDOW_MORE_TEXT, callback_res);
        } else {
          StringID message = GetGRFStringID(ind->grf_prop.grffile->grfid, 0xD000 + callback_res);
          if (message != STR_NULL && message != STR_UNDEFINED) {
            y += WD_PAR_VSEP_WIDE;
 
            StartTextRefStackUsage(ind->grf_prop.grffile, 6);
            /* Use all the available space left from where we stand up to the
             * end of the window. We ALSO enlarge the window if needed, so we
             * can 'go' wild with the bottom of the window. */
            y = DrawStringMultiLine(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, UINT16_MAX, message, TC_BLACK);
            StopTextRefStackUsage();
          }
        }
      }
    }
 
    if (!i->text.empty()) {
      SetDParamStr(0, i->text);
      y += WD_PAR_VSEP_WIDE;
      y = DrawStringMultiLine(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
    }
 
    return y + WD_FRAMERECT_BOTTOM;
  }
 
  void SetStringParameters(int widget) const override
  {
    if (widget == WID_IV_CAPTION) SetDParam(0, this->window_number);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_IV_INFO) size->height = this->info_height;
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_IV_INFO: {
        Industry *i = Industry::Get(this->window_number);
        InfoLine line = IL_NONE;
 
        switch (this->editable) {
          case EA_NONE: break;
 
          case EA_MULTIPLIER:
            if (IsInsideBS(pt.y, this->production_offset_y, FONT_HEIGHT_NORMAL)) line = IL_MULTIPLIER;
            break;
 
          case EA_RATE:
            if (pt.y >= this->production_offset_y) {
              int row = (pt.y - this->production_offset_y) / FONT_HEIGHT_NORMAL;
              for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
                if (i->produced_cargo[j] == CT_INVALID) continue;
                row--;
                if (row < 0) {
                  line = (InfoLine)(IL_RATE1 + j);
                  break;
                }
              }
            }
            break;
        }
        if (line == IL_NONE) return;
 
        NWidgetBase *nwi = this->GetWidget<NWidgetBase>(widget);
        int left = nwi->pos_x + WD_FRAMETEXT_LEFT;
        int right = nwi->pos_x + nwi->current_x - 1 - WD_FRAMERECT_RIGHT;
        if (IsInsideMM(pt.x, left, left + SETTING_BUTTON_WIDTH)) {
          /* Clicked buttons, decrease or increase production */
          byte button = (pt.x < left + SETTING_BUTTON_WIDTH / 2) ? 1 : 2;
          switch (this->editable) {
            case EA_MULTIPLIER:
              if (button == 1) {
                if (i->prod_level <= PRODLEVEL_MINIMUM) return;
                i->prod_level = std::max<uint>(i->prod_level / 2, PRODLEVEL_MINIMUM);
              } else {
                if (i->prod_level >= PRODLEVEL_MAXIMUM) return;
                i->prod_level = std::min<uint>(i->prod_level * 2, PRODLEVEL_MAXIMUM);
              }
              break;
 
            case EA_RATE:
              if (button == 1) {
                if (i->production_rate[line - IL_RATE1] <= 0) return;
                i->production_rate[line - IL_RATE1] = std::max(i->production_rate[line - IL_RATE1] / 2, 0);
              } else {
                if (i->production_rate[line - IL_RATE1] >= 255) return;
                /* a zero production industry is unlikely to give anything but zero, so push it a little bit */
                int new_prod = i->production_rate[line - IL_RATE1] == 0 ? 1 : i->production_rate[line - IL_RATE1] * 2;
                i->production_rate[line - IL_RATE1] = std::min<uint>(new_prod, 255);
              }
              break;
 
            default: NOT_REACHED();
          }
 
          UpdateIndustryProduction(i);
          this->SetDirty();
          this->SetTimeout();
          this->clicked_line = line;
          this->clicked_button = button;
        } else if (IsInsideMM(pt.x, left + SETTING_BUTTON_WIDTH + 10, right)) {
          /* clicked the text */
          this->editbox_line = line;
          switch (this->editable) {
            case EA_MULTIPLIER:
              SetDParam(0, RoundDivSU(i->prod_level * 100, PRODLEVEL_DEFAULT));
              ShowQueryString(STR_JUST_INT, STR_CONFIG_GAME_PRODUCTION_LEVEL, 10, this, CS_ALPHANUMERAL, QSF_NONE);
              break;
 
            case EA_RATE:
              SetDParam(0, i->production_rate[line - IL_RATE1] * 8);
              ShowQueryString(STR_JUST_INT, STR_CONFIG_GAME_PRODUCTION, 10, this, CS_ALPHANUMERAL, QSF_NONE);
              break;
 
            default: NOT_REACHED();
          }
        }
        break;
      }
 
      case WID_IV_GOTO: {
        Industry *i = Industry::Get(this->window_number);
        if (_ctrl_pressed) {
          ShowExtraViewportWindow(i->location.GetCenterTile());
        } else {
          ScrollMainWindowToTile(i->location.GetCenterTile());
        }
        break;
      }
 
      case WID_IV_DISPLAY: {
        Industry *i = Industry::Get(this->window_number);
        ShowIndustryCargoesWindow(i->type);
        break;
      }
    }
  }
 
  void OnTimeout() override
  {
    this->clicked_line = IL_NONE;
    this->clicked_button = 0;
    this->SetDirty();
  }
 
  void OnResize() override
  {
    if (this->viewport != nullptr) {
      NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_IV_VIEWPORT);
      nvp->UpdateViewportCoordinates(this);
 
      ScrollWindowToTile(Industry::Get(this->window_number)->location.GetCenterTile(), this, true); // Re-center viewport.
    }
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (StrEmpty(str)) return;
 
    Industry *i = Industry::Get(this->window_number);
    uint value = atoi(str);
    switch (this->editbox_line) {
      case IL_NONE: NOT_REACHED();
 
      case IL_MULTIPLIER:
        i->prod_level = ClampU(RoundDivSU(value * PRODLEVEL_DEFAULT, 100), PRODLEVEL_MINIMUM, PRODLEVEL_MAXIMUM);
        break;
 
      default:
        i->production_rate[this->editbox_line - IL_RATE1] = ClampU(RoundDivSU(value, 8), 0, 255);
        break;
    }
    UpdateIndustryProduction(i);
    this->SetDirty();
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!gui_scope) return;
    const Industry *i = Industry::Get(this->window_number);
    if (IsProductionAlterable(i)) {
      const IndustrySpec *ind = GetIndustrySpec(i->type);
      this->editable = ind->UsesOriginalEconomy() ? EA_MULTIPLIER : EA_RATE;
    } else {
      this->editable = EA_NONE;
    }
  }
 
  bool IsNewGRFInspectable() const override
  {
    return ::IsNewGRFInspectable(GSF_INDUSTRIES, this->window_number);
  }
 
  void ShowNewGRFInspectWindow() const override
  {
    ::ShowNewGRFInspectWindow(GSF_INDUSTRIES, this->window_number);
  }
};
 
static void UpdateIndustryProduction(Industry *i)
{
  const IndustrySpec *indspec = GetIndustrySpec(i->type);
  if (indspec->UsesOriginalEconomy()) i->RecomputeProductionMultipliers();
 
  for (byte j = 0; j < lengthof(i->produced_cargo); j++) {
    if (i->produced_cargo[j] != CT_INVALID) {
      i->last_month_production[j] = 8 * i->production_rate[j];
    }
  }
}
 
static const NWidgetPart _nested_industry_view_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_CREAM),
    NWidget(WWT_CAPTION, COLOUR_CREAM, WID_IV_CAPTION), SetDataTip(STR_INDUSTRY_VIEW_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_PUSHIMGBTN, COLOUR_CREAM, WID_IV_GOTO), SetMinimalSize(12, 14), SetDataTip(SPR_GOTO_LOCATION, STR_INDUSTRY_VIEW_LOCATION_TOOLTIP),
    NWidget(WWT_DEBUGBOX, COLOUR_CREAM),
    NWidget(WWT_SHADEBOX, COLOUR_CREAM),
    NWidget(WWT_DEFSIZEBOX, COLOUR_CREAM),
    NWidget(WWT_STICKYBOX, COLOUR_CREAM),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_CREAM),
    NWidget(WWT_INSET, COLOUR_CREAM), SetPadding(2, 2, 2, 2),
      NWidget(NWID_VIEWPORT, INVALID_COLOUR, WID_IV_VIEWPORT), SetMinimalSize(254, 86), SetFill(1, 0), SetResize(1, 1),
    EndContainer(),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_CREAM, WID_IV_INFO), SetMinimalSize(260, 2), SetResize(1, 0),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_PUSHTXTBTN, COLOUR_CREAM, WID_IV_DISPLAY), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_INDUSTRY_DISPLAY_CHAIN, STR_INDUSTRY_DISPLAY_CHAIN_TOOLTIP),
    NWidget(WWT_RESIZEBOX, COLOUR_CREAM),
  EndContainer(),
};
 
static WindowDesc _industry_view_desc(
  WDP_AUTO, "view_industry", 260, 120,
  WC_INDUSTRY_VIEW, WC_NONE,
  0,
  _nested_industry_view_widgets, lengthof(_nested_industry_view_widgets)
);
 
void ShowIndustryViewWindow(int industry)
{
  AllocateWindowDescFront<IndustryViewWindow>(&_industry_view_desc, industry);
}
 
static const NWidgetPart _nested_industry_directory_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_CAPTION, COLOUR_BROWN), SetDataTip(STR_INDUSTRY_DIRECTORY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_HORIZONTAL),
        NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_ID_DROPDOWN_ORDER), SetDataTip(STR_BUTTON_SORT_BY, STR_TOOLTIP_SORT_ORDER),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_ID_DROPDOWN_CRITERIA), SetDataTip(STR_JUST_STRING, STR_TOOLTIP_SORT_CRITERIA),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_ID_FILTER_BY_ACC_CARGO), SetMinimalSize(225, 12), SetFill(0, 1), SetDataTip(STR_INDUSTRY_DIRECTORY_ACCEPTED_CARGO_FILTER, STR_TOOLTIP_FILTER_CRITERIA),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_ID_FILTER_BY_PROD_CARGO), SetMinimalSize(225, 12), SetFill(0, 1), SetDataTip(STR_INDUSTRY_DIRECTORY_PRODUCED_CARGO_FILTER, STR_TOOLTIP_FILTER_CRITERIA),
        NWidget(WWT_PANEL, COLOUR_BROWN), SetResize(1, 0), EndContainer(),
      EndContainer(),
      NWidget(WWT_PANEL, COLOUR_BROWN, WID_ID_INDUSTRY_LIST), SetDataTip(0x0, STR_INDUSTRY_DIRECTORY_LIST_CAPTION), SetResize(1, 1), SetScrollbar(WID_ID_SCROLLBAR), EndContainer(),
    EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, WID_ID_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
    EndContainer(),
  EndContainer(),
};
 
typedef GUIList<const Industry *, const std::pair<CargoID, CargoID> &> GUIIndustryList;
 
enum CargoFilterSpecialType {
  CF_ANY  = CT_NO_REFIT, 
  CF_NONE = CT_INVALID,  
};
 
static bool CDECL CargoFilter(const Industry * const *industry, const std::pair<CargoID, CargoID> &cargoes)
{
  auto accepted_cargo = cargoes.first;
  auto produced_cargo = cargoes.second;
 
  bool accepted_cargo_matches;
 
  switch (accepted_cargo) {
    case CF_ANY:
      accepted_cargo_matches = true;
      break;
 
    case CF_NONE:
      accepted_cargo_matches = std::all_of(std::begin((*industry)->accepts_cargo), std::end((*industry)->accepts_cargo), [](CargoID cargo) {
        return cargo == CT_INVALID;
      });
      break;
 
    default:
      const auto &ac = (*industry)->accepts_cargo;
      accepted_cargo_matches = std::find(std::begin(ac), std::end(ac), accepted_cargo) != std::end(ac);
      break;
  }
 
  bool produced_cargo_matches;
 
  switch (produced_cargo) {
    case CF_ANY:
      produced_cargo_matches = true;
      break;
 
    case CF_NONE:
      produced_cargo_matches = std::all_of(std::begin((*industry)->produced_cargo), std::end((*industry)->produced_cargo), [](CargoID cargo) {
        return cargo == CT_INVALID;
      });
      break;
 
    default:
      const auto &pc = (*industry)->produced_cargo;
      produced_cargo_matches = std::find(std::begin(pc), std::end(pc), produced_cargo) != std::end(pc);
      break;
  }
 
  return accepted_cargo_matches && produced_cargo_matches;
}
 
static GUIIndustryList::FilterFunction * const _filter_funcs[] = { &CargoFilter };
 
 
class IndustryDirectoryWindow : public Window {
protected:
  /* Runtime saved values */
  static Listing last_sorting;
 
  /* Constants for sorting industries */
  static const StringID sorter_names[];
  static GUIIndustryList::SortFunction * const sorter_funcs[];
 
  GUIIndustryList industries;
  Scrollbar *vscroll;
 
  CargoID cargo_filter[NUM_CARGO + 2];        
  StringID cargo_filter_texts[NUM_CARGO + 3]; 
  byte produced_cargo_filter_criteria;        
  byte accepted_cargo_filter_criteria;        
  static CargoID produced_cargo_filter;
 
  enum class SorterType : uint8 {
    IDW_SORT_BY_NAME,                       
    IDW_SORT_BY_TYPE,                       
    IDW_SORT_BY_PRODUCTION,                 
    IDW_SORT_BY_TRANSPORTED,                
  };
 
  void SetProducedCargoFilterIndex(byte index)
  {
    if (this->produced_cargo_filter_criteria != index) {
      this->produced_cargo_filter_criteria = index;
      /* deactivate filter if criteria is 'Show All', activate it otherwise */
      bool is_filtering_necessary = this->cargo_filter[this->produced_cargo_filter_criteria] != CF_ANY || this->cargo_filter[this->accepted_cargo_filter_criteria] != CF_ANY;
 
      this->industries.SetFilterState(is_filtering_necessary);
      this->industries.SetFilterType(0);
      this->industries.ForceRebuild();
    }
  }
 
  void SetAcceptedCargoFilterIndex(byte index)
  {
    if (this->accepted_cargo_filter_criteria != index) {
      this->accepted_cargo_filter_criteria = index;
      /* deactivate filter if criteria is 'Show All', activate it otherwise */
      bool is_filtering_necessary = this->cargo_filter[this->produced_cargo_filter_criteria] != CF_ANY || this->cargo_filter[this->accepted_cargo_filter_criteria] != CF_ANY;
 
      this->industries.SetFilterState(is_filtering_necessary);
      this->industries.SetFilterType(0);
      this->industries.ForceRebuild();
    }
  }
 
  void SetCargoFilterArray()
  {
    byte filter_items = 0;
 
    /* Add item for disabling filtering. */
    this->cargo_filter[filter_items] = CF_ANY;
    this->cargo_filter_texts[filter_items] = STR_INDUSTRY_DIRECTORY_FILTER_ALL_TYPES;
    this->produced_cargo_filter_criteria = filter_items;
    this->accepted_cargo_filter_criteria = filter_items;
    filter_items++;
 
    /* Add item for industries not producing anything, e.g. power plants */
    this->cargo_filter[filter_items] = CF_NONE;
    this->cargo_filter_texts[filter_items] = STR_INDUSTRY_DIRECTORY_FILTER_NONE;
    filter_items++;
 
    /* Collect available cargo types for filtering. */
    for (const CargoSpec *cs : _sorted_standard_cargo_specs) {
      this->cargo_filter[filter_items] = cs->Index();
      this->cargo_filter_texts[filter_items] = cs->name;
      filter_items++;
    }
 
    /* Terminate the filter list. */
    this->cargo_filter_texts[filter_items] = INVALID_STRING_ID;
 
    this->industries.SetFilterFuncs(_filter_funcs);
 
    bool is_filtering_necessary = this->cargo_filter[this->produced_cargo_filter_criteria] != CF_ANY || this->cargo_filter[this->accepted_cargo_filter_criteria] != CF_ANY;
 
    this->industries.SetFilterState(is_filtering_necessary);
  }
 
  void BuildSortIndustriesList()
  {
    if (this->industries.NeedRebuild()) {
      this->industries.clear();
 
      for (const Industry *i : Industry::Iterate()) {
        this->industries.push_back(i);
      }
 
      this->industries.shrink_to_fit();
      this->industries.RebuildDone();
    }
 
    auto filter = std::make_pair(this->cargo_filter[this->accepted_cargo_filter_criteria],
                                 this->cargo_filter[this->produced_cargo_filter_criteria]);
 
    this->industries.Filter(filter);
 
    IndustryDirectoryWindow::produced_cargo_filter = this->cargo_filter[this->produced_cargo_filter_criteria];
    this->industries.Sort();
 
    this->vscroll->SetCount((uint)this->industries.size()); // Update scrollbar as well.
 
    this->SetDirty();
  }
 
  static inline int GetCargoTransportedPercentsIfValid(const Industry *i, uint id)
  {
    assert(id < lengthof(i->produced_cargo));
 
    if (i->produced_cargo[id] == CT_INVALID) return -1;
    return ToPercent8(i->last_month_pct_transported[id]);
  }
 
  static int GetCargoTransportedSortValue(const Industry *i)
  {
    CargoID filter = IndustryDirectoryWindow::produced_cargo_filter;
    if (filter == CF_NONE) return 0;
 
    int percentage = 0, produced_cargo_count = 0;
    for (uint id = 0; id < lengthof(i->produced_cargo); id++) {
      if (filter == CF_ANY) {
        int transported = GetCargoTransportedPercentsIfValid(i, id);
        if (transported != -1) {
          produced_cargo_count++;
          percentage += transported;
        }
        if (produced_cargo_count == 0 && id == lengthof(i->produced_cargo) - 1 && percentage == 0) {
          return transported;
        }
      } else if (filter == i->produced_cargo[id]) {
        return GetCargoTransportedPercentsIfValid(i, id);
      }
    }
 
    if (produced_cargo_count == 0) return percentage;
    return percentage / produced_cargo_count;
  }
 
  static bool IndustryNameSorter(const Industry * const &a, const Industry * const &b)
  {
    int r = strnatcmp(a->GetCachedName(), b->GetCachedName()); // Sort by name (natural sorting).
    if (r == 0) return a->index < b->index;
    return r < 0;
  }
 
  static bool IndustryTypeSorter(const Industry * const &a, const Industry * const &b)
  {
    int it_a = 0;
    while (it_a != NUM_INDUSTRYTYPES && a->type != _sorted_industry_types[it_a]) it_a++;
    int it_b = 0;
    while (it_b != NUM_INDUSTRYTYPES && b->type != _sorted_industry_types[it_b]) it_b++;
    int r = it_a - it_b;
    return (r == 0) ? IndustryNameSorter(a, b) : r < 0;
  }
 
  static bool IndustryProductionSorter(const Industry * const &a, const Industry * const &b)
  {
    CargoID filter = IndustryDirectoryWindow::produced_cargo_filter;
    if (filter == CF_NONE) return IndustryTypeSorter(a, b);
 
    uint prod_a = 0, prod_b = 0;
    for (uint i = 0; i < lengthof(a->produced_cargo); i++) {
      if (filter == CF_ANY) {
        if (a->produced_cargo[i] != CT_INVALID) prod_a += a->last_month_production[i];
        if (b->produced_cargo[i] != CT_INVALID) prod_b += b->last_month_production[i];
      } else {
        if (a->produced_cargo[i] == filter) prod_a += a->last_month_production[i];
        if (b->produced_cargo[i] == filter) prod_b += b->last_month_production[i];
      }
    }
    int r = prod_a - prod_b;
 
    return (r == 0) ? IndustryTypeSorter(a, b) : r < 0;
  }
 
  static bool IndustryTransportedCargoSorter(const Industry * const &a, const Industry * const &b)
  {
    int r = GetCargoTransportedSortValue(a) - GetCargoTransportedSortValue(b);
    return (r == 0) ? IndustryNameSorter(a, b) : r < 0;
  }
 
  StringID GetIndustryString(const Industry *i) const
  {
    const IndustrySpec *indsp = GetIndustrySpec(i->type);
    byte p = 0;
 
    /* Industry name */
    SetDParam(p++, i->index);
 
    static CargoSuffix cargo_suffix[lengthof(i->produced_cargo)];
    GetAllCargoSuffixes(CARGOSUFFIX_OUT, CST_DIR, i, i->type, indsp, i->produced_cargo, cargo_suffix);
 
    /* Get industry productions (CargoID, production, suffix, transported) */
    struct CargoInfo {
      CargoID cargo_id;
      uint16 production;
      const char *suffix;
      uint transported;
    };
    std::vector<CargoInfo> cargos;
 
    for (byte j = 0; j < lengthof(i->produced_cargo); j++) {
      if (i->produced_cargo[j] == CT_INVALID) continue;
      cargos.push_back({ i->produced_cargo[j], i->last_month_production[j], cargo_suffix[j].text, ToPercent8(i->last_month_pct_transported[j]) });
    }
 
    switch (static_cast<IndustryDirectoryWindow::SorterType>(this->industries.SortType())) {
      case IndustryDirectoryWindow::SorterType::IDW_SORT_BY_NAME:
      case IndustryDirectoryWindow::SorterType::IDW_SORT_BY_TYPE:
      case IndustryDirectoryWindow::SorterType::IDW_SORT_BY_PRODUCTION:
        /* Sort by descending production, then descending transported */
        std::sort(cargos.begin(), cargos.end(), [](const CargoInfo &a, const CargoInfo &b) {
          if (a.production != b.production) return a.production > b.production;
          return a.transported > b.transported;
        });
        break;
 
      case IndustryDirectoryWindow::SorterType::IDW_SORT_BY_TRANSPORTED:
        /* Sort by descending transported, then descending production */
        std::sort(cargos.begin(), cargos.end(), [](const CargoInfo &a, const CargoInfo &b) {
          if (a.transported != b.transported) return a.transported > b.transported;
          return a.production > b.production;
        });
        break;
    }
 
    /* If the produced cargo filter is active then move the filtered cargo to the beginning of the list,
     * because this is the one the player interested in, and that way it is not hidden in the 'n' more cargos */
    const CargoID cid = this->cargo_filter[this->produced_cargo_filter_criteria];
    if (cid != CF_ANY && cid != CF_NONE) {
      auto filtered_ci = std::find_if(cargos.begin(), cargos.end(), [cid](const CargoInfo &ci) -> bool {
        return ci.cargo_id == cid;
      });
      if (filtered_ci != cargos.end()) {
        std::rotate(cargos.begin(), filtered_ci, filtered_ci + 1);
      }
    }
 
    /* Display first 3 cargos */
    for (size_t j = 0; j < std::min<size_t>(3, cargos.size()); j++) {
      CargoInfo ci = cargos[j];
      SetDParam(p++, STR_INDUSTRY_DIRECTORY_ITEM_INFO);
      SetDParam(p++, ci.cargo_id);
      SetDParam(p++, ci.production);
      SetDParamStr(p++, ci.suffix);
      SetDParam(p++, ci.transported);
    }
 
    /* Undisplayed cargos if any */
    SetDParam(p++, cargos.size() - 3);
 
    /* Drawing the right string */
    switch (cargos.size()) {
      case 0: return STR_INDUSTRY_DIRECTORY_ITEM_NOPROD;
      case 1: return STR_INDUSTRY_DIRECTORY_ITEM_PROD1;
      case 2: return STR_INDUSTRY_DIRECTORY_ITEM_PROD2;
      case 3: return STR_INDUSTRY_DIRECTORY_ITEM_PROD3;
      default: return STR_INDUSTRY_DIRECTORY_ITEM_PRODMORE;
    }
  }
 
public:
  IndustryDirectoryWindow(WindowDesc *desc, WindowNumber number) : Window(desc)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_ID_SCROLLBAR);
 
    this->industries.SetListing(this->last_sorting);
    this->industries.SetSortFuncs(IndustryDirectoryWindow::sorter_funcs);
    this->industries.ForceRebuild();
    this->BuildSortIndustriesList();
 
    this->FinishInitNested(0);
  }
 
  ~IndustryDirectoryWindow()
  {
    this->last_sorting = this->industries.GetListing();
  }
 
  void OnInit() override
  {
    this->SetCargoFilterArray();
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_ID_DROPDOWN_CRITERIA:
        SetDParam(0, IndustryDirectoryWindow::sorter_names[this->industries.SortType()]);
        break;
 
      case WID_ID_FILTER_BY_ACC_CARGO:
        SetDParam(0, this->cargo_filter_texts[this->accepted_cargo_filter_criteria]);
        break;
 
      case WID_ID_FILTER_BY_PROD_CARGO:
        SetDParam(0, this->cargo_filter_texts[this->produced_cargo_filter_criteria]);
        break;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_ID_DROPDOWN_ORDER:
        this->DrawSortButtonState(widget, this->industries.IsDescSortOrder() ? SBS_DOWN : SBS_UP);
        break;
 
      case WID_ID_INDUSTRY_LIST: {
        int n = 0;
        int y = r.top + WD_FRAMERECT_TOP;
        if (this->industries.size() == 0) {
          DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_INDUSTRY_DIRECTORY_NONE);
          break;
        }
        TextColour tc;
        const CargoID acf_cid = this->cargo_filter[this->accepted_cargo_filter_criteria];
        for (uint i = this->vscroll->GetPosition(); i < this->industries.size(); i++) {
          tc = TC_FROMSTRING;
          if (acf_cid != CF_ANY && acf_cid != CF_NONE) {
            Industry *ind = const_cast<Industry *>(this->industries[i]);
            if (IndustryTemporarilyRefusesCargo(ind, acf_cid)) {
              tc = TC_GREY | TC_FORCED;
            }
          }
          DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, this->GetIndustryString(this->industries[i]), tc);
 
          y += this->resize.step_height;
          if (++n == this->vscroll->GetCapacity()) break; // max number of industries in 1 window
        }
        break;
      }
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_ID_DROPDOWN_ORDER: {
        Dimension d = GetStringBoundingBox(this->GetWidget<NWidgetCore>(widget)->widget_data);
        d.width += padding.width + Window::SortButtonWidth() * 2; // Doubled since the string is centred and it also looks better.
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
 
      case WID_ID_DROPDOWN_CRITERIA: {
        Dimension d = {0, 0};
        for (uint i = 0; IndustryDirectoryWindow::sorter_names[i] != INVALID_STRING_ID; i++) {
          d = maxdim(d, GetStringBoundingBox(IndustryDirectoryWindow::sorter_names[i]));
        }
        d.width += padding.width;
        d.height += padding.height;
        *size = maxdim(*size, d);
        break;
      }
 
      case WID_ID_INDUSTRY_LIST: {
        Dimension d = GetStringBoundingBox(STR_INDUSTRY_DIRECTORY_NONE);
        for (uint i = 0; i < this->industries.size(); i++) {
          d = maxdim(d, GetStringBoundingBox(this->GetIndustryString(this->industries[i])));
        }
        resize->height = d.height;
        d.height *= 5;
        d.width += padding.width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
        d.height += padding.height + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
        *size = maxdim(*size, d);
        break;
      }
    }
  }
 
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_ID_DROPDOWN_ORDER:
        this->industries.ToggleSortOrder();
        this->SetDirty();
        break;
 
      case WID_ID_DROPDOWN_CRITERIA:
        ShowDropDownMenu(this, IndustryDirectoryWindow::sorter_names, this->industries.SortType(), WID_ID_DROPDOWN_CRITERIA, 0, 0);
        break;
 
      case WID_ID_FILTER_BY_ACC_CARGO: // Cargo filter dropdown
        ShowDropDownMenu(this, this->cargo_filter_texts, this->accepted_cargo_filter_criteria, WID_ID_FILTER_BY_ACC_CARGO, 0, 0);
        break;
 
      case WID_ID_FILTER_BY_PROD_CARGO: // Cargo filter dropdown
        ShowDropDownMenu(this, this->cargo_filter_texts, this->produced_cargo_filter_criteria, WID_ID_FILTER_BY_PROD_CARGO, 0, 0);
        break;
 
      case WID_ID_INDUSTRY_LIST: {
        uint p = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_ID_INDUSTRY_LIST, WD_FRAMERECT_TOP);
        if (p < this->industries.size()) {
          if (_ctrl_pressed) {
            ShowExtraViewportWindow(this->industries[p]->location.tile);
          } else {
            ScrollMainWindowToTile(this->industries[p]->location.tile);
          }
        }
        break;
      }
    }
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    switch (widget) {
      case WID_ID_DROPDOWN_CRITERIA: {
        if (this->industries.SortType() != index) {
          this->industries.SetSortType(index);
          this->BuildSortIndustriesList();
        }
        break;
      }
 
      case WID_ID_FILTER_BY_ACC_CARGO: {
        this->SetAcceptedCargoFilterIndex(index);
        this->BuildSortIndustriesList();
        break;
      }
 
      case WID_ID_FILTER_BY_PROD_CARGO: {
        this->SetProducedCargoFilterIndex(index);
        this->BuildSortIndustriesList();
        break;
      }
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_ID_INDUSTRY_LIST);
  }
 
  void OnPaint() override
  {
    if (this->industries.NeedRebuild()) this->BuildSortIndustriesList();
    this->DrawWidgets();
  }
 
  void OnHundredthTick() override
  {
    this->industries.ForceResort();
    this->BuildSortIndustriesList();
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    switch (data) {
      case IDIWD_FORCE_REBUILD:
        /* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
        this->industries.ForceRebuild();
        break;
 
      case IDIWD_PRODUCTION_CHANGE:
        if (this->industries.SortType() == 2) this->industries.ForceResort();
        break;
 
      default:
        this->industries.ForceResort();
        break;
    }
  }
};
 
Listing IndustryDirectoryWindow::last_sorting = {false, 0};
 
/* Available station sorting functions. */
GUIIndustryList::SortFunction * const IndustryDirectoryWindow::sorter_funcs[] = {
  &IndustryNameSorter,
  &IndustryTypeSorter,
  &IndustryProductionSorter,
  &IndustryTransportedCargoSorter
};
 
/* Names of the sorting functions */
const StringID IndustryDirectoryWindow::sorter_names[] = {
  STR_SORT_BY_NAME,
  STR_SORT_BY_TYPE,
  STR_SORT_BY_PRODUCTION,
  STR_SORT_BY_TRANSPORTED,
  INVALID_STRING_ID
};
 
CargoID IndustryDirectoryWindow::produced_cargo_filter = CF_ANY;
 
 
static WindowDesc _industry_directory_desc(
  WDP_AUTO, "list_industries", 428, 190,
  WC_INDUSTRY_DIRECTORY, WC_NONE,
  0,
  _nested_industry_directory_widgets, lengthof(_nested_industry_directory_widgets)
);
 
void ShowIndustryDirectory()
{
  AllocateWindowDescFront<IndustryDirectoryWindow>(&_industry_directory_desc, 0);
}
 
static const NWidgetPart _nested_industry_cargoes_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_CAPTION, COLOUR_BROWN, WID_IC_CAPTION), SetDataTip(STR_INDUSTRY_CARGOES_INDUSTRY_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_BROWN),
    NWidget(WWT_DEFSIZEBOX, COLOUR_BROWN),
    NWidget(WWT_STICKYBOX, COLOUR_BROWN),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_VERTICAL),
      NWidget(WWT_PANEL, COLOUR_BROWN, WID_IC_PANEL), SetResize(1, 10), SetMinimalSize(200, 90), SetScrollbar(WID_IC_SCROLLBAR), EndContainer(),
      NWidget(NWID_HORIZONTAL),
        NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_IC_NOTIFY),
          SetDataTip(STR_INDUSTRY_CARGOES_NOTIFY_SMALLMAP, STR_INDUSTRY_CARGOES_NOTIFY_SMALLMAP_TOOLTIP),
        NWidget(WWT_PANEL, COLOUR_BROWN), SetFill(1, 0), SetResize(0, 0), EndContainer(),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_IC_IND_DROPDOWN), SetFill(0, 0), SetResize(0, 0),
            SetDataTip(STR_INDUSTRY_CARGOES_SELECT_INDUSTRY, STR_INDUSTRY_CARGOES_SELECT_INDUSTRY_TOOLTIP),
        NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_IC_CARGO_DROPDOWN), SetFill(0, 0), SetResize(0, 0),
            SetDataTip(STR_INDUSTRY_CARGOES_SELECT_CARGO, STR_INDUSTRY_CARGOES_SELECT_CARGO_TOOLTIP),
      EndContainer(),
    EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, WID_IC_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _industry_cargoes_desc(
  WDP_AUTO, "industry_cargoes", 300, 210,
  WC_INDUSTRY_CARGOES, WC_NONE,
  0,
  _nested_industry_cargoes_widgets, lengthof(_nested_industry_cargoes_widgets)
);
 
enum CargoesFieldType {
  CFT_EMPTY,       
  CFT_SMALL_EMPTY, 
  CFT_INDUSTRY,    
  CFT_CARGO,       
  CFT_CARGO_LABEL, 
  CFT_HEADER,      
};
 
static const uint MAX_CARGOES = 16; 
 
struct CargoesField {
  static const int VERT_INTER_INDUSTRY_SPACE;
  static const int BLOB_DISTANCE;
 
  static Dimension legend;
  static Dimension cargo_border;
  static Dimension cargo_line;
  static Dimension cargo_space;
  static Dimension cargo_stub;
 
  static const int INDUSTRY_LINE_COLOUR;
  static const int CARGO_LINE_COLOUR;
 
  static int small_height, normal_height;
  static int cargo_field_width;
  static int industry_width;
  static uint max_cargoes;
 
  CargoesFieldType type; 
  union {
    struct {
      IndustryType ind_type;                 
      CargoID other_produced[MAX_CARGOES];   
      CargoID other_accepted[MAX_CARGOES];   
    } industry; 
    struct {
      CargoID vertical_cargoes[MAX_CARGOES]; 
      byte num_cargoes;                      
      CargoID supp_cargoes[MAX_CARGOES];     
      byte top_end;                          
      CargoID cust_cargoes[MAX_CARGOES];     
      byte bottom_end;                       
    } cargo; 
    struct {
      CargoID cargoes[MAX_CARGOES];          
      bool left_align;                       
    } cargo_label;   
    StringID header; 
  } u; // Data for each type.
 
  void MakeEmpty(CargoesFieldType type)
  {
    this->type = type;
  }
 
  void MakeIndustry(IndustryType ind_type)
  {
    this->type = CFT_INDUSTRY;
    this->u.industry.ind_type = ind_type;
    MemSetT(this->u.industry.other_accepted, INVALID_CARGO, MAX_CARGOES);
    MemSetT(this->u.industry.other_produced, INVALID_CARGO, MAX_CARGOES);
  }
 
  int ConnectCargo(CargoID cargo, bool producer)
  {
    assert(this->type == CFT_CARGO);
    if (cargo == INVALID_CARGO) return -1;
 
    /* Find the vertical cargo column carrying the cargo. */
    int column = -1;
    for (int i = 0; i < this->u.cargo.num_cargoes; i++) {
      if (cargo == this->u.cargo.vertical_cargoes[i]) {
        column = i;
        break;
      }
    }
    if (column < 0) return -1;
 
    if (producer) {
      assert(this->u.cargo.supp_cargoes[column] == INVALID_CARGO);
      this->u.cargo.supp_cargoes[column]  = column;
    } else {
      assert(this->u.cargo.cust_cargoes[column] == INVALID_CARGO);
      this->u.cargo.cust_cargoes[column] = column;
    }
    return column;
  }
 
  bool HasConnection()
  {
    assert(this->type == CFT_CARGO);
 
    for (uint i = 0; i < MAX_CARGOES; i++) {
      if (this->u.cargo.supp_cargoes[i] != INVALID_CARGO) return true;
      if (this->u.cargo.cust_cargoes[i] != INVALID_CARGO) return true;
    }
    return false;
  }
 
  void MakeCargo(const CargoID *cargoes, uint length, int count = -1, bool top_end = false, bool bottom_end = false)
  {
    this->type = CFT_CARGO;
    uint i;
    uint num = 0;
    for (i = 0; i < MAX_CARGOES && i < length; i++) {
      if (cargoes[i] != INVALID_CARGO) {
        this->u.cargo.vertical_cargoes[num] = cargoes[i];
        num++;
      }
    }
    this->u.cargo.num_cargoes = (count < 0) ? num : count;
    for (; num < MAX_CARGOES; num++) this->u.cargo.vertical_cargoes[num] = INVALID_CARGO;
    this->u.cargo.top_end = top_end;
    this->u.cargo.bottom_end = bottom_end;
    MemSetT(this->u.cargo.supp_cargoes, INVALID_CARGO, MAX_CARGOES);
    MemSetT(this->u.cargo.cust_cargoes, INVALID_CARGO, MAX_CARGOES);
  }
 
  void MakeCargoLabel(const CargoID *cargoes, uint length, bool left_align)
  {
    this->type = CFT_CARGO_LABEL;
    uint i;
    for (i = 0; i < MAX_CARGOES && i < length; i++) this->u.cargo_label.cargoes[i] = cargoes[i];
    for (; i < MAX_CARGOES; i++) this->u.cargo_label.cargoes[i] = INVALID_CARGO;
    this->u.cargo_label.left_align = left_align;
  }
 
  void MakeHeader(StringID textid)
  {
    this->type = CFT_HEADER;
    this->u.header = textid;
  }
 
  int GetCargoBase(int xpos) const
  {
    assert(this->type == CFT_CARGO);
    int n = this->u.cargo.num_cargoes;
 
    return xpos + cargo_field_width / 2 - (CargoesField::cargo_line.width * n + CargoesField::cargo_space.width * (n - 1)) / 2;
  }
 
  void Draw(int xpos, int ypos) const
  {
    switch (this->type) {
      case CFT_EMPTY:
      case CFT_SMALL_EMPTY:
        break;
 
      case CFT_HEADER:
        ypos += (small_height - FONT_HEIGHT_NORMAL) / 2;
        DrawString(xpos, xpos + industry_width, ypos, this->u.header, TC_WHITE, SA_HOR_CENTER);
        break;
 
      case CFT_INDUSTRY: {
        int ypos1 = ypos + VERT_INTER_INDUSTRY_SPACE / 2;
        int ypos2 = ypos + normal_height - 1 - VERT_INTER_INDUSTRY_SPACE / 2;
        int xpos2 = xpos + industry_width - 1;
        GfxDrawLine(xpos,  ypos1, xpos2, ypos1, INDUSTRY_LINE_COLOUR);
        GfxDrawLine(xpos,  ypos1, xpos,  ypos2, INDUSTRY_LINE_COLOUR);
        GfxDrawLine(xpos,  ypos2, xpos2, ypos2, INDUSTRY_LINE_COLOUR);
        GfxDrawLine(xpos2, ypos1, xpos2, ypos2, INDUSTRY_LINE_COLOUR);
        ypos += (normal_height - FONT_HEIGHT_NORMAL) / 2;
        if (this->u.industry.ind_type < NUM_INDUSTRYTYPES) {
          const IndustrySpec *indsp = GetIndustrySpec(this->u.industry.ind_type);
          DrawString(xpos, xpos2, ypos, indsp->name, TC_WHITE, SA_HOR_CENTER);
 
          /* Draw the industry legend. */
          int blob_left, blob_right;
          if (_current_text_dir == TD_RTL) {
            blob_right = xpos2 - BLOB_DISTANCE;
            blob_left  = blob_right - CargoesField::legend.width;
          } else {
            blob_left  = xpos + BLOB_DISTANCE;
            blob_right = blob_left + CargoesField::legend.width;
          }
          GfxFillRect(blob_left,     ypos2 - BLOB_DISTANCE - CargoesField::legend.height,     blob_right,     ypos2 - BLOB_DISTANCE,     PC_BLACK); // Border
          GfxFillRect(blob_left + 1, ypos2 - BLOB_DISTANCE - CargoesField::legend.height + 1, blob_right - 1, ypos2 - BLOB_DISTANCE - 1, indsp->map_colour);
        } else {
          DrawString(xpos, xpos2, ypos, STR_INDUSTRY_CARGOES_HOUSES, TC_FROMSTRING, SA_HOR_CENTER);
        }
 
        /* Draw the other_produced/other_accepted cargoes. */
        const CargoID *other_right, *other_left;
        if (_current_text_dir == TD_RTL) {
          other_right = this->u.industry.other_accepted;
          other_left  = this->u.industry.other_produced;
        } else {
          other_right = this->u.industry.other_produced;
          other_left  = this->u.industry.other_accepted;
        }
        ypos1 += CargoesField::cargo_border.height + (FONT_HEIGHT_NORMAL - CargoesField::cargo_line.height) / 2;
        for (uint i = 0; i < CargoesField::max_cargoes; i++) {
          if (other_right[i] != INVALID_CARGO) {
            const CargoSpec *csp = CargoSpec::Get(other_right[i]);
            int xp = xpos + industry_width + CargoesField::cargo_stub.width;
            DrawHorConnection(xpos + industry_width, xp - 1, ypos1, csp);
            GfxDrawLine(xp, ypos1, xp, ypos1 + CargoesField::cargo_line.height - 1, CARGO_LINE_COLOUR);
          }
          if (other_left[i] != INVALID_CARGO) {
            const CargoSpec *csp = CargoSpec::Get(other_left[i]);
            int xp = xpos - CargoesField::cargo_stub.width;
            DrawHorConnection(xp + 1, xpos - 1, ypos1, csp);
            GfxDrawLine(xp, ypos1, xp, ypos1 + CargoesField::cargo_line.height - 1, CARGO_LINE_COLOUR);
          }
          ypos1 += FONT_HEIGHT_NORMAL + CargoesField::cargo_space.height;
        }
        break;
      }
 
      case CFT_CARGO: {
        int cargo_base = this->GetCargoBase(xpos);
        int top = ypos + (this->u.cargo.top_end ? VERT_INTER_INDUSTRY_SPACE / 2 + 1 : 0);
        int bot = ypos - (this->u.cargo.bottom_end ? VERT_INTER_INDUSTRY_SPACE / 2 + 1 : 0) + normal_height - 1;
        int colpos = cargo_base;
        for (int i = 0; i < this->u.cargo.num_cargoes; i++) {
          if (this->u.cargo.top_end) GfxDrawLine(colpos, top - 1, colpos + CargoesField::cargo_line.width - 1, top - 1, CARGO_LINE_COLOUR);
          if (this->u.cargo.bottom_end) GfxDrawLine(colpos, bot + 1, colpos + CargoesField::cargo_line.width - 1, bot + 1, CARGO_LINE_COLOUR);
          GfxDrawLine(colpos, top, colpos, bot, CARGO_LINE_COLOUR);
          colpos++;
          const CargoSpec *csp = CargoSpec::Get(this->u.cargo.vertical_cargoes[i]);
          GfxFillRect(colpos, top, colpos + CargoesField::cargo_line.width - 2, bot, csp->legend_colour, FILLRECT_OPAQUE);
          colpos += CargoesField::cargo_line.width - 2;
          GfxDrawLine(colpos, top, colpos, bot, CARGO_LINE_COLOUR);
          colpos += 1 + CargoesField::cargo_space.width;
        }
 
        const CargoID *hor_left, *hor_right;
        if (_current_text_dir == TD_RTL) {
          hor_left  = this->u.cargo.cust_cargoes;
          hor_right = this->u.cargo.supp_cargoes;
        } else {
          hor_left  = this->u.cargo.supp_cargoes;
          hor_right = this->u.cargo.cust_cargoes;
        }
        ypos += CargoesField::cargo_border.height + VERT_INTER_INDUSTRY_SPACE / 2 + (FONT_HEIGHT_NORMAL - CargoesField::cargo_line.height) / 2;
        for (uint i = 0; i < MAX_CARGOES; i++) {
          if (hor_left[i] != INVALID_CARGO) {
            int col = hor_left[i];
            int dx = 0;
            const CargoSpec *csp = CargoSpec::Get(this->u.cargo.vertical_cargoes[col]);
            for (; col > 0; col--) {
              int lf = cargo_base + col * CargoesField::cargo_line.width + (col - 1) * CargoesField::cargo_space.width;
              DrawHorConnection(lf, lf + CargoesField::cargo_space.width - dx, ypos, csp);
              dx = 1;
            }
            DrawHorConnection(xpos, cargo_base - dx, ypos, csp);
          }
          if (hor_right[i] != INVALID_CARGO) {
            int col = hor_right[i];
            int dx = 0;
            const CargoSpec *csp = CargoSpec::Get(this->u.cargo.vertical_cargoes[col]);
            for (; col < this->u.cargo.num_cargoes - 1; col++) {
              int lf = cargo_base + (col + 1) * CargoesField::cargo_line.width + col * CargoesField::cargo_space.width;
              DrawHorConnection(lf + dx - 1, lf + CargoesField::cargo_space.width - 1, ypos, csp);
              dx = 1;
            }
            DrawHorConnection(cargo_base + col * CargoesField::cargo_space.width + (col + 1) * CargoesField::cargo_line.width - 1 + dx, xpos + CargoesField::cargo_field_width - 1, ypos, csp);
          }
          ypos += FONT_HEIGHT_NORMAL + CargoesField::cargo_space.height;
        }
        break;
      }
 
      case CFT_CARGO_LABEL:
        ypos += CargoesField::cargo_border.height + VERT_INTER_INDUSTRY_SPACE / 2;
        for (uint i = 0; i < MAX_CARGOES; i++) {
          if (this->u.cargo_label.cargoes[i] != INVALID_CARGO) {
            const CargoSpec *csp = CargoSpec::Get(this->u.cargo_label.cargoes[i]);
            DrawString(xpos + WD_FRAMERECT_LEFT, xpos + industry_width - 1 - WD_FRAMERECT_RIGHT, ypos, csp->name, TC_WHITE,
                (this->u.cargo_label.left_align) ? SA_LEFT : SA_RIGHT);
          }
          ypos += FONT_HEIGHT_NORMAL + CargoesField::cargo_space.height;
        }
        break;
 
      default:
        NOT_REACHED();
    }
  }
 
  CargoID CargoClickedAt(const CargoesField *left, const CargoesField *right, Point pt) const
  {
    assert(this->type == CFT_CARGO);
 
    /* Vertical matching. */
    int cpos = this->GetCargoBase(0);
    uint col;
    for (col = 0; col < this->u.cargo.num_cargoes; col++) {
      if (pt.x < cpos) break;
      if (pt.x < cpos + (int)CargoesField::cargo_line.width) return this->u.cargo.vertical_cargoes[col];
      cpos += CargoesField::cargo_line.width + CargoesField::cargo_space.width;
    }
    /* col = 0 -> left of first col, 1 -> left of 2nd col, ... this->u.cargo.num_cargoes right of last-col. */
 
    int vpos = VERT_INTER_INDUSTRY_SPACE / 2 + CargoesField::cargo_border.width;
    uint row;
    for (row = 0; row < MAX_CARGOES; row++) {
      if (pt.y < vpos) return INVALID_CARGO;
      if (pt.y < vpos + FONT_HEIGHT_NORMAL) break;
      vpos += FONT_HEIGHT_NORMAL + CargoesField::cargo_space.width;
    }
    if (row == MAX_CARGOES) return INVALID_CARGO;
 
    /* row = 0 -> at first horizontal row, row = 1 -> second horizontal row, 2 = 3rd horizontal row. */
    if (col == 0) {
      if (this->u.cargo.supp_cargoes[row] != INVALID_CARGO) return this->u.cargo.vertical_cargoes[this->u.cargo.supp_cargoes[row]];
      if (left != nullptr) {
        if (left->type == CFT_INDUSTRY) return left->u.industry.other_produced[row];
        if (left->type == CFT_CARGO_LABEL && !left->u.cargo_label.left_align) return left->u.cargo_label.cargoes[row];
      }
      return INVALID_CARGO;
    }
    if (col == this->u.cargo.num_cargoes) {
      if (this->u.cargo.cust_cargoes[row] != INVALID_CARGO) return this->u.cargo.vertical_cargoes[this->u.cargo.cust_cargoes[row]];
      if (right != nullptr) {
        if (right->type == CFT_INDUSTRY) return right->u.industry.other_accepted[row];
        if (right->type == CFT_CARGO_LABEL && right->u.cargo_label.left_align) return right->u.cargo_label.cargoes[row];
      }
      return INVALID_CARGO;
    }
    if (row >= col) {
      /* Clicked somewhere in-between vertical cargo connection.
       * Since the horizontal connection is made in the same order as the vertical list, the above condition
       * ensures we are left-below the main diagonal, thus at the supplying side.
       */
      return (this->u.cargo.supp_cargoes[row] != INVALID_CARGO) ? this->u.cargo.vertical_cargoes[this->u.cargo.supp_cargoes[row]] : INVALID_CARGO;
    } else {
      /* Clicked at a customer connection. */
      return (this->u.cargo.cust_cargoes[row] != INVALID_CARGO) ? this->u.cargo.vertical_cargoes[this->u.cargo.cust_cargoes[row]] : INVALID_CARGO;
    }
  }
 
  CargoID CargoLabelClickedAt(Point pt) const
  {
    assert(this->type == CFT_CARGO_LABEL);
 
    int vpos = VERT_INTER_INDUSTRY_SPACE / 2 + CargoesField::cargo_border.height;
    uint row;
    for (row = 0; row < MAX_CARGOES; row++) {
      if (pt.y < vpos) return INVALID_CARGO;
      if (pt.y < vpos + FONT_HEIGHT_NORMAL) break;
      vpos += FONT_HEIGHT_NORMAL + CargoesField::cargo_space.height;
    }
    if (row == MAX_CARGOES) return INVALID_CARGO;
    return this->u.cargo_label.cargoes[row];
  }
 
private:
  static void DrawHorConnection(int left, int right, int top, const CargoSpec *csp)
  {
    GfxDrawLine(left, top, right, top, CARGO_LINE_COLOUR);
    GfxFillRect(left, top + 1, right, top + CargoesField::cargo_line.height - 2, csp->legend_colour, FILLRECT_OPAQUE);
    GfxDrawLine(left, top + CargoesField::cargo_line.height - 1, right, top + CargoesField::cargo_line.height - 1, CARGO_LINE_COLOUR);
  }
};
 
static_assert(MAX_CARGOES >= cpp_lengthof(IndustrySpec, produced_cargo));
static_assert(MAX_CARGOES >= cpp_lengthof(IndustrySpec, accepts_cargo));
 
Dimension CargoesField::legend;       
Dimension CargoesField::cargo_border; 
Dimension CargoesField::cargo_line;   
Dimension CargoesField::cargo_space;  
Dimension CargoesField::cargo_stub;   
 
int CargoesField::small_height;      
int CargoesField::normal_height;     
int CargoesField::industry_width;    
int CargoesField::cargo_field_width; 
uint CargoesField::max_cargoes;      
const int CargoesField::VERT_INTER_INDUSTRY_SPACE = 6; 
 
const int CargoesField::BLOB_DISTANCE =  5; 
 
const int CargoesField::INDUSTRY_LINE_COLOUR = PC_YELLOW; 
const int CargoesField::CARGO_LINE_COLOUR    = PC_YELLOW; 
 
struct CargoesRow {
  CargoesField columns[5]; 
 
  void ConnectIndustryProduced(int column)
  {
    CargoesField *ind_fld   = this->columns + column;
    CargoesField *cargo_fld = this->columns + column + 1;
    assert(ind_fld->type == CFT_INDUSTRY && cargo_fld->type == CFT_CARGO);
 
    MemSetT(ind_fld->u.industry.other_produced, INVALID_CARGO, MAX_CARGOES);
 
    if (ind_fld->u.industry.ind_type < NUM_INDUSTRYTYPES) {
      CargoID others[MAX_CARGOES]; // Produced cargoes not carried in the cargo column.
      int other_count = 0;
 
      const IndustrySpec *indsp = GetIndustrySpec(ind_fld->u.industry.ind_type);
      assert(CargoesField::max_cargoes <= lengthof(indsp->produced_cargo));
      for (uint i = 0; i < CargoesField::max_cargoes; i++) {
        int col = cargo_fld->ConnectCargo(indsp->produced_cargo[i], true);
        if (col < 0) others[other_count++] = indsp->produced_cargo[i];
      }
 
      /* Allocate other cargoes in the empty holes of the horizontal cargo connections. */
      for (uint i = 0; i < CargoesField::max_cargoes && other_count > 0; i++) {
        if (cargo_fld->u.cargo.supp_cargoes[i] == INVALID_CARGO) ind_fld->u.industry.other_produced[i] = others[--other_count];
      }
    } else {
      /* Houses only display what is demanded. */
      for (uint i = 0; i < cargo_fld->u.cargo.num_cargoes; i++) {
        CargoID cid = cargo_fld->u.cargo.vertical_cargoes[i];
        if (cid == CT_PASSENGERS || cid == CT_MAIL) cargo_fld->ConnectCargo(cid, true);
      }
    }
  }
 
  void MakeCargoLabel(int column, bool accepting)
  {
    CargoID cargoes[MAX_CARGOES];
    MemSetT(cargoes, INVALID_CARGO, lengthof(cargoes));
 
    CargoesField *label_fld = this->columns + column;
    CargoesField *cargo_fld = this->columns + (accepting ? column - 1 : column + 1);
 
    assert(cargo_fld->type == CFT_CARGO && label_fld->type == CFT_EMPTY);
    for (uint i = 0; i < cargo_fld->u.cargo.num_cargoes; i++) {
      int col = cargo_fld->ConnectCargo(cargo_fld->u.cargo.vertical_cargoes[i], !accepting);
      if (col >= 0) cargoes[col] = cargo_fld->u.cargo.vertical_cargoes[i];
    }
    label_fld->MakeCargoLabel(cargoes, lengthof(cargoes), accepting);
  }
 
 
  void ConnectIndustryAccepted(int column)
  {
    CargoesField *ind_fld   = this->columns + column;
    CargoesField *cargo_fld = this->columns + column - 1;
    assert(ind_fld->type == CFT_INDUSTRY && cargo_fld->type == CFT_CARGO);
 
    MemSetT(ind_fld->u.industry.other_accepted, INVALID_CARGO, MAX_CARGOES);
 
    if (ind_fld->u.industry.ind_type < NUM_INDUSTRYTYPES) {
      CargoID others[MAX_CARGOES]; // Accepted cargoes not carried in the cargo column.
      int other_count = 0;
 
      const IndustrySpec *indsp = GetIndustrySpec(ind_fld->u.industry.ind_type);
      assert(CargoesField::max_cargoes <= lengthof(indsp->accepts_cargo));
      for (uint i = 0; i < CargoesField::max_cargoes; i++) {
        int col = cargo_fld->ConnectCargo(indsp->accepts_cargo[i], false);
        if (col < 0) others[other_count++] = indsp->accepts_cargo[i];
      }
 
      /* Allocate other cargoes in the empty holes of the horizontal cargo connections. */
      for (uint i = 0; i < CargoesField::max_cargoes && other_count > 0; i++) {
        if (cargo_fld->u.cargo.cust_cargoes[i] == INVALID_CARGO) ind_fld->u.industry.other_accepted[i] = others[--other_count];
      }
    } else {
      /* Houses only display what is demanded. */
      for (uint i = 0; i < cargo_fld->u.cargo.num_cargoes; i++) {
        for (uint h = 0; h < NUM_HOUSES; h++) {
          HouseSpec *hs = HouseSpec::Get(h);
          if (!hs->enabled) continue;
 
          for (uint j = 0; j < lengthof(hs->accepts_cargo); j++) {
            if (hs->cargo_acceptance[j] > 0 && cargo_fld->u.cargo.vertical_cargoes[i] == hs->accepts_cargo[j]) {
              cargo_fld->ConnectCargo(cargo_fld->u.cargo.vertical_cargoes[i], false);
              goto next_cargo;
            }
          }
        }
next_cargo: ;
      }
    }
  }
};
 
 
struct IndustryCargoesWindow : public Window {
  static const int HOR_TEXT_PADDING, VERT_TEXT_PADDING;
 
  typedef std::vector<CargoesRow> Fields;
 
  Fields fields;  
  uint ind_cargo; 
  Dimension cargo_textsize; 
  Dimension ind_textsize;   
  Scrollbar *vscroll;
 
  IndustryCargoesWindow(int id) : Window(&_industry_cargoes_desc)
  {
    this->OnInit();
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_IC_SCROLLBAR);
    this->FinishInitNested(0);
    this->OnInvalidateData(id);
  }
 
  void OnInit() override
  {
    /* Initialize static CargoesField size variables. */
    Dimension d = GetStringBoundingBox(STR_INDUSTRY_CARGOES_PRODUCERS);
    d = maxdim(d, GetStringBoundingBox(STR_INDUSTRY_CARGOES_CUSTOMERS));
    d.width  += WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT;
    d.height += WD_FRAMETEXT_TOP + WD_FRAMETEXT_BOTTOM;
    CargoesField::small_height = d.height;
 
    /* Size of the legend blob -- slightly larger than the smallmap legend blob. */
    CargoesField::legend.height = FONT_HEIGHT_SMALL;
    CargoesField::legend.width = CargoesField::legend.height * 8 / 5;
 
    /* Size of cargo lines. */
    CargoesField::cargo_line.width = FONT_HEIGHT_NORMAL;
    CargoesField::cargo_line.height = CargoesField::cargo_line.width;
 
    /* Size of border between cargo lines and industry boxes. */
    CargoesField::cargo_border.width = CargoesField::cargo_line.width * 3 / 2;
    CargoesField::cargo_border.height = CargoesField::cargo_line.width / 2;
 
    /* Size of space between cargo lines. */
    CargoesField::cargo_space.width = CargoesField::cargo_line.width / 2;
    CargoesField::cargo_space.height = CargoesField::cargo_line.height / 2;
 
    /* Size of cargo stub (unconnected cargo line.) */
    CargoesField::cargo_stub.width = CargoesField::cargo_line.width / 2;
    CargoesField::cargo_stub.height = CargoesField::cargo_line.height; /* Unused */
 
    /* Decide about the size of the box holding the text of an industry type. */
    this->ind_textsize.width = 0;
    this->ind_textsize.height = 0;
    CargoesField::max_cargoes = 0;
    for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
      const IndustrySpec *indsp = GetIndustrySpec(it);
      if (!indsp->enabled) continue;
      this->ind_textsize = maxdim(this->ind_textsize, GetStringBoundingBox(indsp->name));
      CargoesField::max_cargoes = std::max<uint>(CargoesField::max_cargoes, std::count_if(indsp->accepts_cargo, endof(indsp->accepts_cargo), IsCargoIDValid));
      CargoesField::max_cargoes = std::max<uint>(CargoesField::max_cargoes, std::count_if(indsp->produced_cargo, endof(indsp->produced_cargo), IsCargoIDValid));
    }
    d.width = std::max(d.width, this->ind_textsize.width);
    d.height = this->ind_textsize.height;
    this->ind_textsize = maxdim(this->ind_textsize, GetStringBoundingBox(STR_INDUSTRY_CARGOES_SELECT_INDUSTRY));
 
    /* Compute max size of the cargo texts. */
    this->cargo_textsize.width = 0;
    this->cargo_textsize.height = 0;
    for (uint i = 0; i < NUM_CARGO; i++) {
      const CargoSpec *csp = CargoSpec::Get(i);
      if (!csp->IsValid()) continue;
      this->cargo_textsize = maxdim(this->cargo_textsize, GetStringBoundingBox(csp->name));
    }
    d = maxdim(d, this->cargo_textsize); // Box must also be wide enough to hold any cargo label.
    this->cargo_textsize = maxdim(this->cargo_textsize, GetStringBoundingBox(STR_INDUSTRY_CARGOES_SELECT_CARGO));
 
    d.width  += 2 * HOR_TEXT_PADDING;
    /* Ensure the height is enough for the industry type text, for the horizontal connections, and for the cargo labels. */
    uint min_ind_height = CargoesField::cargo_border.height * 2 + CargoesField::max_cargoes * FONT_HEIGHT_NORMAL + (CargoesField::max_cargoes - 1) * CargoesField::cargo_space.height;
    d.height = std::max(d.height + 2 * VERT_TEXT_PADDING, min_ind_height);
 
    CargoesField::industry_width = d.width;
    CargoesField::normal_height = d.height + CargoesField::VERT_INTER_INDUSTRY_SPACE;
 
    /* Width of a #CFT_CARGO field. */
    CargoesField::cargo_field_width = CargoesField::cargo_border.width * 2 + CargoesField::cargo_line.width * CargoesField::max_cargoes + CargoesField::cargo_space.width * (CargoesField::max_cargoes - 1);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_IC_PANEL:
        resize->height = CargoesField::normal_height;
        size->width = WD_FRAMETEXT_LEFT + CargoesField::industry_width * 3 + CargoesField::cargo_field_width * 2 + WD_FRAMETEXT_RIGHT;
        size->height = WD_FRAMETEXT_TOP + CargoesField::small_height + 2 * resize->height + WD_FRAMETEXT_BOTTOM;
        break;
 
      case WID_IC_IND_DROPDOWN:
        size->width = std::max(size->width, this->ind_textsize.width + padding.width);
        break;
 
      case WID_IC_CARGO_DROPDOWN:
        size->width = std::max(size->width, this->cargo_textsize.width + padding.width);
        break;
    }
  }
 
 
  CargoesFieldType type; 
  void SetStringParameters  (int widget) const override
  {
    if (widget != WID_IC_CAPTION) return;
 
    if (this->ind_cargo < NUM_INDUSTRYTYPES) {
      const IndustrySpec *indsp = GetIndustrySpec(this->ind_cargo);
      SetDParam(0, indsp->name);
    } else {
      const CargoSpec *csp = CargoSpec::Get(this->ind_cargo - NUM_INDUSTRYTYPES);
      SetDParam(0, csp->name);
    }
  }
 
  static bool HasCommonValidCargo(const CargoID *cargoes1, uint length1, const CargoID *cargoes2, uint length2)
  {
    while (length1 > 0) {
      if (*cargoes1 != INVALID_CARGO) {
        for (uint i = 0; i < length2; i++) if (*cargoes1 == cargoes2[i]) return true;
      }
      cargoes1++;
      length1--;
    }
    return false;
  }
 
  static bool HousesCanSupply(const CargoID *cargoes, uint length)
  {
    for (uint i = 0; i < length; i++) {
      if (cargoes[i] == INVALID_CARGO) continue;
      if (cargoes[i] == CT_PASSENGERS || cargoes[i] == CT_MAIL) return true;
    }
    return false;
  }
 
  static bool HousesCanAccept(const CargoID *cargoes, uint length)
  {
    HouseZones climate_mask;
    switch (_settings_game.game_creation.landscape) {
      case LT_TEMPERATE: climate_mask = HZ_TEMP; break;
      case LT_ARCTIC:    climate_mask = HZ_SUBARTC_ABOVE | HZ_SUBARTC_BELOW; break;
      case LT_TROPIC:    climate_mask = HZ_SUBTROPIC; break;
      case LT_TOYLAND:   climate_mask = HZ_TOYLND; break;
      default: NOT_REACHED();
    }
    for (uint i = 0; i < length; i++) {
      if (cargoes[i] == INVALID_CARGO) continue;
 
      for (uint h = 0; h < NUM_HOUSES; h++) {
        HouseSpec *hs = HouseSpec::Get(h);
        if (!hs->enabled || !(hs->building_availability & climate_mask)) continue;
 
        for (uint j = 0; j < lengthof(hs->accepts_cargo); j++) {
          if (hs->cargo_acceptance[j] > 0 && cargoes[i] == hs->accepts_cargo[j]) return true;
        }
      }
    }
    return false;
  }
 
  static int CountMatchingAcceptingIndustries(const CargoID *cargoes, uint length)
  {
    int count = 0;
    for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
      const IndustrySpec *indsp = GetIndustrySpec(it);
      if (!indsp->enabled) continue;
 
      if (HasCommonValidCargo(cargoes, length, indsp->accepts_cargo, lengthof(indsp->accepts_cargo))) count++;
    }
    return count;
  }
 
  static int CountMatchingProducingIndustries(const CargoID *cargoes, uint length)
  {
    int count = 0;
    for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
      const IndustrySpec *indsp = GetIndustrySpec(it);
      if (!indsp->enabled) continue;
 
      if (HasCommonValidCargo(cargoes, length, indsp->produced_cargo, lengthof(indsp->produced_cargo))) count++;
    }
    return count;
  }
 
  void ShortenCargoColumn(int column, int top, int bottom)
  {
    while (top < bottom && !this->fields[top].columns[column].HasConnection()) {
      this->fields[top].columns[column].MakeEmpty(CFT_EMPTY);
      top++;
    }
    this->fields[top].columns[column].u.cargo.top_end = true;
 
    while (bottom > top && !this->fields[bottom].columns[column].HasConnection()) {
      this->fields[bottom].columns[column].MakeEmpty(CFT_EMPTY);
      bottom--;
    }
    this->fields[bottom].columns[column].u.cargo.bottom_end = true;
  }
 
  void PlaceIndustry(int row, int col, IndustryType it)
  {
    assert(this->fields[row].columns[col].type == CFT_EMPTY);
    this->fields[row].columns[col].MakeIndustry(it);
    if (col == 0) {
      this->fields[row].ConnectIndustryProduced(col);
    } else {
      this->fields[row].ConnectIndustryAccepted(col);
    }
  }
 
  void NotifySmallmap()
  {
    if (!this->IsWidgetLowered(WID_IC_NOTIFY)) return;
 
    /* Only notify the smallmap window if it exists. In particular, do not
     * bring it to the front to prevent messing up any nice layout of the user. */
    InvalidateWindowClassesData(WC_SMALLMAP, 0);
  }
 
  void ComputeIndustryDisplay(IndustryType displayed_it)
  {
    this->GetWidget<NWidgetCore>(WID_IC_CAPTION)->widget_data = STR_INDUSTRY_CARGOES_INDUSTRY_CAPTION;
    this->ind_cargo = displayed_it;
    _displayed_industries.reset();
    _displayed_industries.set(displayed_it);
 
    this->fields.clear();
    CargoesRow &row = this->fields.emplace_back();
    row.columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
    row.columns[1].MakeEmpty(CFT_SMALL_EMPTY);
    row.columns[2].MakeEmpty(CFT_SMALL_EMPTY);
    row.columns[3].MakeEmpty(CFT_SMALL_EMPTY);
    row.columns[4].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
 
    const IndustrySpec *central_sp = GetIndustrySpec(displayed_it);
    bool houses_supply = HousesCanSupply(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo));
    bool houses_accept = HousesCanAccept(central_sp->produced_cargo, lengthof(central_sp->produced_cargo));
    /* Make a field consisting of two cargo columns. */
    int num_supp = CountMatchingProducingIndustries(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo)) + houses_supply;
    int num_cust = CountMatchingAcceptingIndustries(central_sp->produced_cargo, lengthof(central_sp->produced_cargo)) + houses_accept;
    int num_indrows = std::max(3, std::max(num_supp, num_cust)); // One is needed for the 'it' industry, and 2 for the cargo labels.
    for (int i = 0; i < num_indrows; i++) {
      CargoesRow &row = this->fields.emplace_back();
      row.columns[0].MakeEmpty(CFT_EMPTY);
      row.columns[1].MakeCargo(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo));
      row.columns[2].MakeEmpty(CFT_EMPTY);
      row.columns[3].MakeCargo(central_sp->produced_cargo, lengthof(central_sp->produced_cargo));
      row.columns[4].MakeEmpty(CFT_EMPTY);
    }
    /* Add central industry. */
    int central_row = 1 + num_indrows / 2;
    this->fields[central_row].columns[2].MakeIndustry(displayed_it);
    this->fields[central_row].ConnectIndustryProduced(2);
    this->fields[central_row].ConnectIndustryAccepted(2);
 
    /* Add cargo labels. */
    this->fields[central_row - 1].MakeCargoLabel(2, true);
    this->fields[central_row + 1].MakeCargoLabel(2, false);
 
    /* Add suppliers and customers of the 'it' industry. */
    int supp_count = 0;
    int cust_count = 0;
    for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
      const IndustrySpec *indsp = GetIndustrySpec(it);
      if (!indsp->enabled) continue;
 
      if (HasCommonValidCargo(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo), indsp->produced_cargo, lengthof(indsp->produced_cargo))) {
        this->PlaceIndustry(1 + supp_count * num_indrows / num_supp, 0, it);
        _displayed_industries.set(it);
        supp_count++;
      }
      if (HasCommonValidCargo(central_sp->produced_cargo, lengthof(central_sp->produced_cargo), indsp->accepts_cargo, lengthof(indsp->accepts_cargo))) {
        this->PlaceIndustry(1 + cust_count * num_indrows / num_cust, 4, it);
        _displayed_industries.set(it);
        cust_count++;
      }
    }
    if (houses_supply) {
      this->PlaceIndustry(1 + supp_count * num_indrows / num_supp, 0, NUM_INDUSTRYTYPES);
      supp_count++;
    }
    if (houses_accept) {
      this->PlaceIndustry(1 + cust_count * num_indrows / num_cust, 4, NUM_INDUSTRYTYPES);
      cust_count++;
    }
 
    this->ShortenCargoColumn(1, 1, num_indrows);
    this->ShortenCargoColumn(3, 1, num_indrows);
    this->vscroll->SetCount(num_indrows);
    this->SetDirty();
    this->NotifySmallmap();
  }
 
  void ComputeCargoDisplay(CargoID cid)
  {
    this->GetWidget<NWidgetCore>(WID_IC_CAPTION)->widget_data = STR_INDUSTRY_CARGOES_CARGO_CAPTION;
    this->ind_cargo = cid + NUM_INDUSTRYTYPES;
    _displayed_industries.reset();
 
    this->fields.clear();
    CargoesRow &row = this->fields.emplace_back();
    row.columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
    row.columns[1].MakeEmpty(CFT_SMALL_EMPTY);
    row.columns[2].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
    row.columns[3].MakeEmpty(CFT_SMALL_EMPTY);
    row.columns[4].MakeEmpty(CFT_SMALL_EMPTY);
 
    bool houses_supply = HousesCanSupply(&cid, 1);
    bool houses_accept = HousesCanAccept(&cid, 1);
    int num_supp = CountMatchingProducingIndustries(&cid, 1) + houses_supply + 1; // Ensure room for the cargo label.
    int num_cust = CountMatchingAcceptingIndustries(&cid, 1) + houses_accept;
    int num_indrows = std::max(num_supp, num_cust);
    for (int i = 0; i < num_indrows; i++) {
      CargoesRow &row = this->fields.emplace_back();
      row.columns[0].MakeEmpty(CFT_EMPTY);
      row.columns[1].MakeCargo(&cid, 1);
      row.columns[2].MakeEmpty(CFT_EMPTY);
      row.columns[3].MakeEmpty(CFT_EMPTY);
      row.columns[4].MakeEmpty(CFT_EMPTY);
    }
 
    this->fields[num_indrows].MakeCargoLabel(0, false); // Add cargo labels at the left bottom.
 
    /* Add suppliers and customers of the cargo. */
    int supp_count = 0;
    int cust_count = 0;
    for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
      const IndustrySpec *indsp = GetIndustrySpec(it);
      if (!indsp->enabled) continue;
 
      if (HasCommonValidCargo(&cid, 1, indsp->produced_cargo, lengthof(indsp->produced_cargo))) {
        this->PlaceIndustry(1 + supp_count * num_indrows / num_supp, 0, it);
        _displayed_industries.set(it);
        supp_count++;
      }
      if (HasCommonValidCargo(&cid, 1, indsp->accepts_cargo, lengthof(indsp->accepts_cargo))) {
        this->PlaceIndustry(1 + cust_count * num_indrows / num_cust, 2, it);
        _displayed_industries.set(it);
        cust_count++;
      }
    }
    if (houses_supply) {
      this->PlaceIndustry(1 + supp_count * num_indrows / num_supp, 0, NUM_INDUSTRYTYPES);
      supp_count++;
    }
    if (houses_accept) {
      this->PlaceIndustry(1 + cust_count * num_indrows / num_cust, 2, NUM_INDUSTRYTYPES);
      cust_count++;
    }
 
    this->ShortenCargoColumn(1, 1, num_indrows);
    this->vscroll->SetCount(num_indrows);
    this->SetDirty();
    this->NotifySmallmap();
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!gui_scope) return;
    if (data == NUM_INDUSTRYTYPES) {
      if (this->IsWidgetLowered(WID_IC_NOTIFY)) {
        this->RaiseWidget(WID_IC_NOTIFY);
        this->SetWidgetDirty(WID_IC_NOTIFY);
      }
      return;
    }
 
    assert(data >= 0 && data < NUM_INDUSTRYTYPES);
    this->ComputeIndustryDisplay(data);
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget != WID_IC_PANEL) return;
 
    DrawPixelInfo tmp_dpi, *old_dpi;
    int width = r.right - r.left + 1;
    int height = r.bottom - r.top + 1 - WD_FRAMERECT_TOP - WD_FRAMERECT_BOTTOM;
    if (!FillDrawPixelInfo(&tmp_dpi, r.left + WD_FRAMERECT_LEFT, r.top + WD_FRAMERECT_TOP, width, height)) return;
    old_dpi = _cur_dpi;
    _cur_dpi = &tmp_dpi;
 
    int left_pos = WD_FRAMERECT_LEFT;
    if (this->ind_cargo >= NUM_INDUSTRYTYPES) left_pos += (CargoesField::industry_width + CargoesField::cargo_field_width) / 2;
    int last_column = (this->ind_cargo < NUM_INDUSTRYTYPES) ? 4 : 2;
 
    const NWidgetBase *nwp = this->GetWidget<NWidgetBase>(WID_IC_PANEL);
    int vpos = -this->vscroll->GetPosition() * nwp->resize_y;
    for (uint i = 0; i < this->fields.size(); i++) {
      int row_height = (i == 0) ? CargoesField::small_height : CargoesField::normal_height;
      if (vpos + row_height >= 0) {
        int xpos = left_pos;
        int col, dir;
        if (_current_text_dir == TD_RTL) {
          col = last_column;
          dir = -1;
        } else {
          col = 0;
          dir = 1;
        }
        while (col >= 0 && col <= last_column) {
          this->fields[i].columns[col].Draw(xpos, vpos);
          xpos += (col & 1) ? CargoesField::cargo_field_width : CargoesField::industry_width;
          col += dir;
        }
      }
      vpos += row_height;
      if (vpos >= height) break;
    }
 
    _cur_dpi = old_dpi;
  }
 
  bool CalculatePositionInWidget(Point pt, Point *fieldxy, Point *xy)
  {
    const NWidgetBase *nw = this->GetWidget<NWidgetBase>(WID_IC_PANEL);
    pt.x -= nw->pos_x;
    pt.y -= nw->pos_y;
 
    int vpos = WD_FRAMERECT_TOP + CargoesField::small_height - this->vscroll->GetPosition() * nw->resize_y;
    if (pt.y < vpos) return false;
 
    int row = (pt.y - vpos) / CargoesField::normal_height; // row is relative to row 1.
    if (row + 1 >= (int)this->fields.size()) return false;
    vpos = pt.y - vpos - row * CargoesField::normal_height; // Position in the row + 1 field
    row++; // rebase row to match index of this->fields.
 
    int xpos = 2 * WD_FRAMERECT_LEFT + ((this->ind_cargo < NUM_INDUSTRYTYPES) ? 0 :  (CargoesField::industry_width + CargoesField::cargo_field_width) / 2);
    if (pt.x < xpos) return false;
    int column;
    for (column = 0; column <= 5; column++) {
      int width = (column & 1) ? CargoesField::cargo_field_width : CargoesField::industry_width;
      if (pt.x < xpos + width) break;
      xpos += width;
    }
    int num_columns = (this->ind_cargo < NUM_INDUSTRYTYPES) ? 4 : 2;
    if (column > num_columns) return false;
    xpos = pt.x - xpos;
 
    /* Return both positions, compensating for RTL languages (which works due to the equal symmetry in both displays). */
    fieldxy->y = row;
    xy->y = vpos;
    if (_current_text_dir == TD_RTL) {
      fieldxy->x = num_columns - column;
      xy->x = ((column & 1) ? CargoesField::cargo_field_width : CargoesField::industry_width) - xpos;
    } else {
      fieldxy->x = column;
      xy->x = xpos;
    }
    return true;
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_IC_PANEL: {
        Point fieldxy, xy;
        if (!CalculatePositionInWidget(pt, &fieldxy, &xy)) return;
 
        const CargoesField *fld = this->fields[fieldxy.y].columns + fieldxy.x;
        switch (fld->type) {
          case CFT_INDUSTRY:
            if (fld->u.industry.ind_type < NUM_INDUSTRYTYPES) this->ComputeIndustryDisplay(fld->u.industry.ind_type);
            break;
 
          case CFT_CARGO: {
            CargoesField *lft = (fieldxy.x > 0) ? this->fields[fieldxy.y].columns + fieldxy.x - 1 : nullptr;
            CargoesField *rgt = (fieldxy.x < 4) ? this->fields[fieldxy.y].columns + fieldxy.x + 1 : nullptr;
            CargoID cid = fld->CargoClickedAt(lft, rgt, xy);
            if (cid != INVALID_CARGO) this->ComputeCargoDisplay(cid);
            break;
          }
 
          case CFT_CARGO_LABEL: {
            CargoID cid = fld->CargoLabelClickedAt(xy);
            if (cid != INVALID_CARGO) this->ComputeCargoDisplay(cid);
            break;
          }
 
          default:
            break;
        }
        break;
      }
 
      case WID_IC_NOTIFY:
        this->ToggleWidgetLoweredState(WID_IC_NOTIFY);
        this->SetWidgetDirty(WID_IC_NOTIFY);
        if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
 
        if (this->IsWidgetLowered(WID_IC_NOTIFY)) {
          if (FindWindowByClass(WC_SMALLMAP) == nullptr) ShowSmallMap();
          this->NotifySmallmap();
        }
        break;
 
      case WID_IC_CARGO_DROPDOWN: {
        DropDownList lst;
        for (const CargoSpec *cs : _sorted_standard_cargo_specs) {
          lst.emplace_back(new DropDownListStringItem(cs->name, cs->Index(), false));
        }
        if (!lst.empty()) {
          int selected = (this->ind_cargo >= NUM_INDUSTRYTYPES) ? (int)(this->ind_cargo - NUM_INDUSTRYTYPES) : -1;
          ShowDropDownList(this, std::move(lst), selected, WID_IC_CARGO_DROPDOWN, 0, true);
        }
        break;
      }
 
      case WID_IC_IND_DROPDOWN: {
        DropDownList lst;
        for (IndustryType ind : _sorted_industry_types) {
          const IndustrySpec *indsp = GetIndustrySpec(ind);
          if (!indsp->enabled) continue;
          lst.emplace_back(new DropDownListStringItem(indsp->name, ind, false));
        }
        if (!lst.empty()) {
          int selected = (this->ind_cargo < NUM_INDUSTRYTYPES) ? (int)this->ind_cargo : -1;
          ShowDropDownList(this, std::move(lst), selected, WID_IC_IND_DROPDOWN, 0, true);
        }
        break;
      }
    }
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    if (index < 0) return;
 
    switch (widget) {
      case WID_IC_CARGO_DROPDOWN:
        this->ComputeCargoDisplay(index);
        break;
 
      case WID_IC_IND_DROPDOWN:
        this->ComputeIndustryDisplay(index);
        break;
    }
  }
 
  bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
  {
    if (widget != WID_IC_PANEL) return false;
 
    Point fieldxy, xy;
    if (!CalculatePositionInWidget(pt, &fieldxy, &xy)) return false;
 
    const CargoesField *fld = this->fields[fieldxy.y].columns + fieldxy.x;
    CargoID cid = INVALID_CARGO;
    switch (fld->type) {
      case CFT_CARGO: {
        CargoesField *lft = (fieldxy.x > 0) ? this->fields[fieldxy.y].columns + fieldxy.x - 1 : nullptr;
        CargoesField *rgt = (fieldxy.x < 4) ? this->fields[fieldxy.y].columns + fieldxy.x + 1 : nullptr;
        cid = fld->CargoClickedAt(lft, rgt, xy);
        break;
      }
 
      case CFT_CARGO_LABEL: {
        cid = fld->CargoLabelClickedAt(xy);
        break;
      }
 
      case CFT_INDUSTRY:
        if (fld->u.industry.ind_type < NUM_INDUSTRYTYPES && (this->ind_cargo >= NUM_INDUSTRYTYPES || fieldxy.x != 2)) {
          GuiShowTooltips(this, STR_INDUSTRY_CARGOES_INDUSTRY_TOOLTIP, 0, nullptr, close_cond);
        }
        return true;
 
      default:
        break;
    }
    if (cid != INVALID_CARGO && (this->ind_cargo < NUM_INDUSTRYTYPES || cid != this->ind_cargo - NUM_INDUSTRYTYPES)) {
      const CargoSpec *csp = CargoSpec::Get(cid);
      uint64 params[5];
      params[0] = csp->name;
      GuiShowTooltips(this, STR_INDUSTRY_CARGOES_CARGO_TOOLTIP, 1, params, close_cond);
      return true;
    }
 
    return false;
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_IC_PANEL, WD_FRAMERECT_TOP + CargoesField::small_height);
  }
};
 
const int IndustryCargoesWindow::HOR_TEXT_PADDING  = 5; 
const int IndustryCargoesWindow::VERT_TEXT_PADDING = 5; 
 
static void ShowIndustryCargoesWindow(IndustryType id)
{
  if (id >= NUM_INDUSTRYTYPES) {
    for (IndustryType ind : _sorted_industry_types) {
      const IndustrySpec *indsp = GetIndustrySpec(ind);
      if (indsp->enabled) {
        id = ind;
        break;
      }
    }
    if (id >= NUM_INDUSTRYTYPES) return;
  }
 
  Window *w = BringWindowToFrontById(WC_INDUSTRY_CARGOES, 0);
  if (w != nullptr) {
    w->InvalidateData(id);
    return;
  }
  new IndustryCargoesWindow(id);
}
 
void ShowIndustryCargoesWindow()
{
  ShowIndustryCargoesWindow(NUM_INDUSTRYTYPES);
}