subsidy_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 "industry.h"
#include "town.h"
#include "window_gui.h"
#include "strings_func.h"
#include "timer/timer_game_calendar.h"
#include "viewport_func.h"
#include "gui.h"
#include "subsidy_func.h"
#include "subsidy_base.h"
#include "core/geometry_func.hpp"
 
#include "widgets/subsidy_widget.h"
 
#include "table/strings.h"
 
#include "safeguards.h"
 
struct SubsidyListWindow : Window {
  Scrollbar *vscroll;
  Dimension cargo_icon_size;
 
  SubsidyListWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_SUL_SCROLLBAR);
    this->FinishInitNested(window_number);
    this->OnInvalidateData(0);
  }
 
  void OnInit() override
  {
    this->cargo_icon_size = GetLargestCargoIconSize();
  }
 
  void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
  {
    if (widget != WID_SUL_PANEL) return;
 
    int y = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_SUL_PANEL, WidgetDimensions::scaled.framerect.top);
    int num = 0;
    for (const Subsidy *s : Subsidy::Iterate()) {
      if (!s->IsAwarded()) {
        y--;
        if (y == 0) {
          this->HandleClick(s);
          return;
        }
        num++;
      }
    }
 
    if (num == 0) {
      y--; // "None"
      if (y < 0) return;
    }
 
    y -= 2; // "Services already subsidised:"
    if (y < 0) return;
 
    for (const Subsidy *s : Subsidy::Iterate()) {
      if (s->IsAwarded()) {
        y--;
        if (y == 0) {
          this->HandleClick(s);
          return;
        }
      }
    }
  }
 
  void HandleClick(const Subsidy *s)
  {
    /* determine src coordinate for subsidy and try to scroll to it */
    TileIndex xy;
    switch (s->src_type) {
      case SourceType::Industry: xy = Industry::Get(s->src)->location.tile; break;
      case SourceType::Town:     xy =     Town::Get(s->src)->xy; break;
      default: NOT_REACHED();
    }
 
    if (_ctrl_pressed || !ScrollMainWindowToTile(xy)) {
      if (_ctrl_pressed) ShowExtraViewportWindow(xy);
 
      /* otherwise determine dst coordinate for subsidy and scroll to it */
      switch (s->dst_type) {
        case SourceType::Industry: xy = Industry::Get(s->dst)->location.tile; break;
        case SourceType::Town:     xy =     Town::Get(s->dst)->xy; break;
        default: NOT_REACHED();
      }
 
      if (_ctrl_pressed) {
        ShowExtraViewportWindow(xy);
      } else {
        ScrollMainWindowToTile(xy);
      }
    }
  }
 
  uint CountLines()
  {
    /* Count number of (non) awarded subsidies */
    uint num_awarded = 0;
    uint num_not_awarded = 0;
    for (const Subsidy *s : Subsidy::Iterate()) {
      if (!s->IsAwarded()) {
        num_not_awarded++;
      } else {
        num_awarded++;
      }
    }
 
    /* Count the 'none' lines */
    if (num_awarded     == 0) num_awarded = 1;
    if (num_not_awarded == 0) num_not_awarded = 1;
 
    /* Offered, accepted and an empty line before the accepted ones. */
    return 3 + num_awarded + num_not_awarded;
  }
 
  void UpdateWidgetSize(WidgetID widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
  {
    if (widget != WID_SUL_PANEL) return;
    Dimension d = maxdim(GetStringBoundingBox(STR_SUBSIDIES_OFFERED_TITLE), GetStringBoundingBox(STR_SUBSIDIES_SUBSIDISED_TITLE));
 
    resize->height = GetCharacterHeight(FS_NORMAL);
 
    d.height *= 5;
    d.width += WidgetDimensions::scaled.framerect.Horizontal();
    d.height += WidgetDimensions::scaled.framerect.Vertical();
    *size = maxdim(*size, d);
  }
 
  void DrawCargoIcon(const Rect &r, int y_offset, CargoID cid) const
  {
    bool rtl = _current_text_dir == TD_RTL;
    SpriteID icon = CargoSpec::Get(cid)->GetCargoIcon();
    Dimension d = GetSpriteSize(icon);
    Rect ir = r.WithWidth(this->cargo_icon_size.width, rtl).WithHeight(GetCharacterHeight(FS_NORMAL));
    DrawSprite(icon, PAL_NONE, CenterBounds(ir.left, ir.right, d.width), CenterBounds(ir.top, ir.bottom, this->cargo_icon_size.height) + y_offset);
  }
 
  void DrawWidget(const Rect &r, WidgetID widget) const override
  {
    if (widget != WID_SUL_PANEL) return;
 
    TimerGameEconomy::YearMonthDay ymd = TimerGameEconomy::ConvertDateToYMD(TimerGameEconomy::date);
 
    Rect tr = r.Shrink(WidgetDimensions::scaled.framerect);
    Rect sr = tr.Indent(this->cargo_icon_size.width + WidgetDimensions::scaled.hsep_normal, _current_text_dir == TD_RTL);
 
    int pos = -this->vscroll->GetPosition();
    const int cap = this->vscroll->GetCapacity();
 
    /* Section for drawing the offered subsidies */
    if (IsInsideMM(pos, 0, cap)) DrawString(tr.left, tr.right, tr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_OFFERED_TITLE);
    pos++;
 
    uint num = 0;
    for (const Subsidy *s : Subsidy::Iterate()) {
      if (!s->IsAwarded()) {
        if (IsInsideMM(pos, 0, cap)) {
          /* Displays the two offered towns */
          SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::Gui);
          /* If using wallclock units, show minutes remaining. Otherwise show the date when the subsidy ends. */
          if (TimerGameEconomy::UsingWallclockUnits()) {
            SetDParam(7, STR_SUBSIDIES_OFFERED_EXPIRY_TIME);
            SetDParam(8, s->remaining + 1); // We get the rest of the current economy month for free, since the expiration is checked on each new month.
          } else {
            SetDParam(7, STR_SUBSIDIES_OFFERED_EXPIRY_DATE);
            SetDParam(8, TimerGameEconomy::date - ymd.day + s->remaining * 32);
          }
 
          DrawCargoIcon(tr, pos * GetCharacterHeight(FS_NORMAL), s->cargo_type);
          DrawString(sr.left, sr.right, sr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_OFFERED_FROM_TO);
        }
        pos++;
        num++;
      }
    }
 
    if (num == 0) {
      if (IsInsideMM(pos, 0, cap)) DrawString(tr.left, tr.right, tr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_NONE);
      pos++;
    }
 
    /* Section for drawing the already granted subsidies */
    pos++;
    if (IsInsideMM(pos, 0, cap)) DrawString(tr.left, tr.right, tr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_SUBSIDISED_TITLE);
    pos++;
    num = 0;
 
    for (const Subsidy *s : Subsidy::Iterate()) {
      if (s->IsAwarded()) {
        if (IsInsideMM(pos, 0, cap)) {
          SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::Gui);
          SetDParam(7, s->awarded);
          /* If using wallclock units, show minutes remaining. Otherwise show the date when the subsidy ends. */
          if (TimerGameEconomy::UsingWallclockUnits()) {
            SetDParam(8, STR_SUBSIDIES_SUBSIDISED_EXPIRY_TIME);
            SetDParam(9, s->remaining);
          }
          else {
            SetDParam(8, STR_SUBSIDIES_SUBSIDISED_EXPIRY_DATE);
            SetDParam(9, TimerGameEconomy::date - ymd.day + s->remaining * 32);
          }
 
          /* Displays the two connected stations */
          DrawCargoIcon(tr, pos * GetCharacterHeight(FS_NORMAL), s->cargo_type);
          DrawString(sr.left, sr.right, sr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_SUBSIDISED_FROM_TO);
        }
        pos++;
        num++;
      }
    }
 
    if (num == 0) {
      if (IsInsideMM(pos, 0, cap)) DrawString(tr.left, tr.right, tr.top + pos * GetCharacterHeight(FS_NORMAL), STR_SUBSIDIES_NONE);
      pos++;
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_SUL_PANEL);
  }
 
  void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
  {
    if (!gui_scope) return;
    this->vscroll->SetCount(this->CountLines());
  }
};
 
static constexpr NWidgetPart _nested_subsidies_list_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_BROWN),
    NWidget(WWT_CAPTION, COLOUR_BROWN), SetDataTip(STR_SUBSIDIES_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(WWT_PANEL, COLOUR_BROWN, WID_SUL_PANEL), SetDataTip(0x0, STR_SUBSIDIES_TOOLTIP_CLICK_ON_SERVICE_TO_CENTER), SetResize(1, 1), SetScrollbar(WID_SUL_SCROLLBAR), EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, COLOUR_BROWN, WID_SUL_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, COLOUR_BROWN),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _subsidies_list_desc(__FILE__, __LINE__,
  WDP_AUTO, "list_subsidies", 500, 127,
  WC_SUBSIDIES_LIST, WC_NONE,
  0,
  std::begin(_nested_subsidies_list_widgets), std::end(_nested_subsidies_list_widgets)
);
 
 
void ShowSubsidiesList()
{
  AllocateWindowDescFront<SubsidyListWindow>(&_subsidies_list_desc, 0);
}