# linkgraph_gui.cpp

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "window_func.h"
    00014 #include "window_gui.h"
    00015 #include "company_base.h"
    00016 #include "company_gui.h"
    00017 #include "date_func.h"
    00018 #include "viewport_func.h"
    00019 #include "linkgraph_gui.h"
    00020 #include "smallmap_gui.h"
    00021 #include "widgets/link_graph_legend_widget.h"
    00022
    00023 #include "table/strings.h"
    00024
    00029 const uint8 LinkGraphOverlay::LINK_COLOURS[] = {
    00030   0x0f, 0xd1, 0xd0, 0x57,
    00031   0x55, 0x53, 0xbf, 0xbd,
    00032   0xba, 0xb9, 0xb7, 0xb5
    00033 };
    00034
    00039 void LinkGraphOverlay::GetWidgetDpi(DrawPixelInfo *dpi) const
    00040 {
    00041   const NWidgetBase *wi = this->window->GetWidget<NWidgetBase>(this->widget_id);
    00042   dpi->left = dpi->top = 0;
    00043   dpi->width = wi->current_x;
    00044   dpi->height = wi->current_y;
    00045 }
    00046
    00050 void LinkGraphOverlay::RebuildCache()
    00051 {
    00052   this->cached_links.clear();
    00053   this->cached_stations.clear();
    00054
    00055   DrawPixelInfo dpi;
    00056   this->GetWidgetDpi(&dpi);
    00057
    00058   const Station *sta;
    00059   FOR_ALL_STATIONS(sta) {
    00060     /* Show links between stations of selected companies or "neutral" ones like oilrigs. */
    00061     if (sta->owner != INVALID_COMPANY && !HasBit(this->company_mask, sta->owner)) continue;
    00062     if (sta->rect.IsEmpty()) continue;
    00063
    00064     Point pta = this->GetStationMiddle(sta);
    00065
    00066     StationID from = sta->index;
    00067     StationLinkMap &seen_links = this->cached_links[from];
    00068
    00069     uint supply = 0;
    00070     CargoID c;
    00071     FOR_EACH_SET_CARGO_ID(c, this->cargo_mask) {
    00072       if (!CargoSpec::Get(c)->IsValid()) continue;
    00073
    00074       supply += sta->goods[c].supply;
    00075       const LinkStatMap &links = sta->goods[c].link_stats;
    00076       for (LinkStatMap::const_iterator i = links.begin(); i != links.end(); ++i) {
    00077         StationID to = i->first;
    00078         if (seen_links.find(to) != seen_links.end()) continue;
    00079
    00080         if (!Station::IsValidID(to)) continue;
    00081         const Station *stb = Station::Get(to);
    00082         if (stb->owner != INVALID_COMPANY && !HasBit(this->company_mask, stb->owner)) continue;
    00083         if (stb->rect.IsEmpty()) continue;
    00084
    00085         if (!this->IsLinkVisible(pta, this->GetStationMiddle(stb), &dpi)) continue;
    00086
    00087         this->AddLinks(sta, stb);
    00088         this->AddLinks(stb, sta);
    00089         seen_links[to]; // make sure it is created and marked as seen
    00090       }
    00091     }
    00092     if (this->IsPointVisible(pta, &dpi)) {
    00093       this->cached_stations.push_back(std::make_pair(from, supply));
    00094     }
    00095   }
    00096 }
    00097
    00105 inline bool LinkGraphOverlay::IsPointVisible(Point pt, const DrawPixelInfo *dpi, int padding) const
    00106 {
    00107   return pt.x > dpi->left - padding && pt.y > dpi->top - padding &&
    00108       pt.x < dpi->left + dpi->width + padding &&
    00109       pt.y < dpi->top + dpi->height + padding;
    00110 }
    00111
    00120 inline bool LinkGraphOverlay::IsLinkVisible(Point pta, Point ptb, const DrawPixelInfo *dpi, int padding) const
    00121 {
    00122   return !((pta.x < dpi->left - padding && ptb.x < dpi->left - padding) ||
    00123       (pta.y < dpi->top - padding && ptb.y < dpi->top - padding) ||
    00124       (pta.x > dpi->left + dpi->width + padding &&
    00125           ptb.x > dpi->left + dpi->width + padding) ||
    00126       (pta.y > dpi->top + dpi->height + padding &&
    00127           ptb.y > dpi->top + dpi->height + padding));
    00128 }
    00129
    00135 void LinkGraphOverlay::AddLinks(const Station *from, const Station *to)
    00136 {
    00137   CargoID c;
    00138   FOR_EACH_SET_CARGO_ID(c, this->cargo_mask) {
    00139     if (!CargoSpec::Get(c)->IsValid()) continue;
    00140     const GoodsEntry &ge = from->goods[c];
    00141     uint sum_flows = ge.GetSumFlowVia(to->index);
    00142     const LinkStatMap &ls_map = ge.link_stats;
    00143     LinkStatMap::const_iterator i = ls_map.find(to->index);
    00144     if (i != ls_map.end()) {
    00145       const LinkStat &link_stat = i->second;
    00146       this->AddStats(link_stat, sum_flows, this->cached_links[from->index][to->index]);
    00147     }
    00148   }
    00149 }
    00150
    00157 /* static */ void LinkGraphOverlay::AddStats(const LinkStat &orig_link, uint new_plan, LinkProperties &cargo)
    00158 {
    00159   uint new_cap = orig_link.Capacity();
    00160   uint new_usg = orig_link.Usage();
    00161
    00162   /* multiply the numbers by 32 in order to avoid comparing to 0 too often. */
    00163   if (cargo.capacity == 0 ||
    00164       max(cargo.usage, cargo.planned) * 32 / (cargo.capacity + 1) < max(new_usg, new_plan) * 32 / (new_cap + 1)) {
    00165     cargo.capacity = new_cap;
    00166     cargo.usage = new_usg;
    00167     cargo.planned = new_plan;
    00168   }
    00169 }
    00170
    00175 void LinkGraphOverlay::Draw(const DrawPixelInfo *dpi) const
    00176 {
    00177   this->DrawLinks(dpi);
    00178   this->DrawStationDots(dpi);
    00179 }
    00180
    00185 void LinkGraphOverlay::DrawLinks(const DrawPixelInfo *dpi) const
    00186 {
    00187   for (LinkMap::const_iterator i(this->cached_links.begin()); i != this->cached_links.end(); ++i) {
    00188     if (!Station::IsValidID(i->first)) continue;
    00189     Point pta = this->GetStationMiddle(Station::Get(i->first));
    00190     for (StationLinkMap::const_iterator j(i->second.begin()); j != i->second.end(); ++j) {
    00191       if (!Station::IsValidID(j->first)) continue;
    00192       Point ptb = this->GetStationMiddle(Station::Get(j->first));
    00193       if (!this->IsLinkVisible(pta, ptb, dpi, this->scale + 2)) continue;
    00194       this->DrawContent(pta, ptb, j->second);
    00195     }
    00196   }
    00197 }
    00198
    00205 void LinkGraphOverlay::DrawContent(Point pta, Point ptb, const LinkProperties &cargo) const
    00206 {
    00207   int offset_y = (pta.x < ptb.x ? 1 : -1) * this->scale;
    00208   int offset_x = (pta.y > ptb.y ? 1 : -1) * this->scale;
    00209
    00210   uint usage_or_plan = min(cargo.capacity * 2 + 1, max(cargo.usage, cargo.planned));
    00211   int colour = LinkGraphOverlay::LINK_COLOURS[usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS) / (cargo.capacity * 2 + 2)];
    00212
    00213   GfxDrawLine(pta.x + offset_x, pta.y, ptb.x + offset_x, ptb.y, colour, scale);
    00214   GfxDrawLine(pta.x, pta.y + offset_y, ptb.x, ptb.y + offset_y, colour, scale);
    00215
    00216   GfxDrawLine(pta.x, pta.y, ptb.x, ptb.y, _colour_gradient[COLOUR_GREY][1], this->scale);
    00217 }
    00218
    00223 void LinkGraphOverlay::DrawStationDots(const DrawPixelInfo *dpi) const
    00224 {
    00225   for (StationSupplyList::const_iterator i(this->cached_stations.begin()); i != this->cached_stations.end(); ++i) {
    00226     const Station *st = Station::GetIfValid(i->first);
    00227     if (st == NULL) continue;
    00228     Point pt = this->GetStationMiddle(st);
    00229     if (!this->IsPointVisible(pt, dpi, 3 * this->scale)) continue;
    00230
    00231     uint r = this->scale * 2 + this->scale * 2 * min(200, i->second) / 200;
    00232
    00233     LinkGraphOverlay::DrawVertex(pt.x, pt.y, r,
    00234         _colour_gradient[Company::Get(st->owner)->colour][5],
    00235         _colour_gradient[COLOUR_GREY][1]);
    00236   }
    00237 }
    00238
    00247 /* static */ void LinkGraphOverlay::DrawVertex(int x, int y, int size, int colour, int border_colour)
    00248 {
    00249   size--;
    00250   int w1 = size / 2;
    00251   int w2 = size / 2 + size % 2;
    00252
    00253   GfxFillRect(x - w1, y - w1, x + w2, y + w2, colour);
    00254
    00255   w1++;
    00256   w2++;
    00257   GfxDrawLine(x - w1, y - w1, x + w2, y - w1, border_colour);
    00258   GfxDrawLine(x - w1, y + w2, x + w2, y + w2, border_colour);
    00259   GfxDrawLine(x - w1, y - w1, x - w1, y + w2, border_colour);
    00260   GfxDrawLine(x + w2, y - w1, x + w2, y + w2, border_colour);
    00261 }
    00262
    00268 Point LinkGraphOverlay::GetStationMiddle(const Station *st) const {
    00269   if (this->window->viewport != NULL) {
    00270     return GetViewportStationMiddle(this->window->viewport, st);
    00271   } else {
    00272     /* assume this is a smallmap */
    00273     return static_cast<const SmallMapWindow *>(this->window)->GetStationMiddle(st);
    00274   }
    00275 }
    00276
    00281 void LinkGraphOverlay::SetCargoMask(uint32 cargo_mask)
    00282 {
    00283   this->cargo_mask = cargo_mask;
    00284   this->RebuildCache();
    00285   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
    00286 }
    00287
    00292 void LinkGraphOverlay::SetCompanyMask(uint32 company_mask)
    00293 {
    00294   this->company_mask = company_mask;
    00295   this->RebuildCache();
    00296   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
    00297 }
    00298
    00300 NWidgetBase *MakeCompanyButtonRowsLinkGraphGUI(int *biggest_index)
    00301 {
    00302   return MakeCompanyButtonRows(biggest_index, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST, 3, STR_LINKGRAPH_LEGEND_SELECT_COMPANIES);
    00303 }
    00304
    00305 NWidgetBase *MakeSaturationLegendLinkGraphGUI(int *biggest_index)
    00306 {
    00307   NWidgetVertical *panel = new NWidgetVertical();
    00308   for (uint i = 0; i < lengthof(LinkGraphOverlay::LINK_COLOURS); ++i) {
    00309     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_DARK_GREEN, i + WID_LGL_SATURATION_FIRST);
    00310     wid->SetMinimalSize(50, FONT_HEIGHT_SMALL);
    00311     wid->SetFill(0, 1);
    00312     wid->SetResize(0, 1);
    00313     panel->Add(wid);
    00314   }
    00315   *biggest_index = WID_LGL_SATURATION_LAST;
    00316   return panel;
    00317 }
    00318
    00319 NWidgetBase *MakeCargoesLegendLinkGraphGUI(int *biggest_index)
    00320 {
    00321   static const uint ENTRIES_PER_ROW = CeilDiv(NUM_CARGO, 5);
    00322   NWidgetVertical *panel = new NWidgetVertical();
    00323   NWidgetHorizontal *row = NULL;
    00324   for (uint i = 0; i < NUM_CARGO; ++i) {
    00325     if (i % ENTRIES_PER_ROW == 0) {
    00326       if (row) panel->Add(row);
    00327       row = new NWidgetHorizontal();
    00328     }
    00329     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_GREY, i + WID_LGL_CARGO_FIRST);
    00330     wid->SetMinimalSize(25, FONT_HEIGHT_SMALL);
    00331     wid->SetFill(0, 1);
    00332     wid->SetResize(0, 1);
    00333     row->Add(wid);
    00334   }
    00335   panel->Add(row);
    00336   *biggest_index = WID_LGL_CARGO_LAST;
    00337   return panel;
    00338 }
    00339
    00340
    00341 static const NWidgetPart _nested_linkgraph_legend_widgets[] = {
    00342   NWidget(NWID_HORIZONTAL),
    00343     NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    00344     NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, WID_LGL_CAPTION), SetDataTip(STR_LINKGRAPH_LEGEND_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    00345     NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
    00346     NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
    00347   EndContainer(),
    00348   NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
    00349     NWidget(NWID_HORIZONTAL),
    00350       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_SATURATION),
    00351         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00352         SetMinimalSize(50, 100),
    00353         NWidgetFunction(MakeSaturationLegendLinkGraphGUI),
    00354       EndContainer(),
    00355       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_COMPANIES),
    00356         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00357         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
    00358           SetMinimalSize(100, 100),
    00359           NWidgetFunction(MakeCompanyButtonRowsLinkGraphGUI),
    00360           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
    00361           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
    00362         EndContainer(),
    00363       EndContainer(),
    00364       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_CARGOES),
    00365         SetPadding(WD_FRAMERECT_TOP, WD_FRAMERECT_RIGHT, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00366         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
    00367           SetMinimalSize(150, 100),
    00368           NWidgetFunction(MakeCargoesLegendLinkGraphGUI),
    00369           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
    00370           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
    00371         EndContainer(),
    00372       EndContainer(),
    00373     EndContainer(),
    00374   EndContainer()
    00375 };
    00376
    00377 assert_compile(WID_LGL_SATURATION_LAST - WID_LGL_SATURATION_FIRST ==
    00378     lengthof(LinkGraphOverlay::LINK_COLOURS) - 1);
    00379
    00380 static const WindowDesc _linkgraph_legend_desc(
    00381   WDP_MANUAL, 300, 314,
    00382   WC_LINKGRAPH_LEGEND, WC_NONE,
    00383   0,
    00384   _nested_linkgraph_legend_widgets, lengthof(_nested_linkgraph_legend_widgets)
    00385 );
    00386
    00390 void ShowLinkGraphLegend()
    00391 {
    00392   AllocateWindowDescFront<LinkGraphLegendWindow>(&_linkgraph_legend_desc, 0);
    00393 }
    00394
    00395 LinkGraphLegendWindow::LinkGraphLegendWindow(const WindowDesc *desc, int window_number)
    00396 {
    00397   this->InitNested(desc, window_number);
    00398   this->InvalidateData(0);
    00399   this->SetOverlay(FindWindowById(WC_MAIN_WINDOW, 0)->viewport->overlay);
    00400 }
    00401
    00406 void LinkGraphLegendWindow::SetOverlay(LinkGraphOverlay *overlay) {
    00407   this->overlay = overlay;
    00408   uint32 companies = this->overlay->GetCompanyMask();
    00409   for (uint c = 0; c < MAX_COMPANIES; c++) {
    00410     if (!this->IsWidgetDisabled(WID_LGL_COMPANY_FIRST + c)) {
    00411       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, HasBit(companies, c));
    00412     }
    00413   }
    00414   uint32 cargoes = this->overlay->GetCargoMask();
    00415   for (uint c = 0; c < NUM_CARGO; c++) {
    00416     if (!this->IsWidgetDisabled(WID_LGL_CARGO_FIRST + c)) {
    00417       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, HasBit(cargoes, c));
    00418     }
    00419   }
    00420 }
    00421
    00422 void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
    00423 {
    00424   const NWidgetBase *wid = this->GetWidget<NWidgetBase>(widget);
    00425   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
    00426     if (this->IsWidgetDisabled(widget)) return;
    00427     CompanyID cid = (CompanyID)(widget - WID_LGL_COMPANY_FIRST);
    00428     Dimension sprite_size = GetSpriteSize(SPR_COMPANY_ICON);
    00429     DrawCompanyIcon(cid, (r.left + r.right - sprite_size.width) / 2, (r.top + r.bottom - sprite_size.height) / 2);
    00430     return;
    00431   }
    00432   if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
    00433     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, LinkGraphOverlay::LINK_COLOURS[widget - WID_LGL_SATURATION_FIRST]);
    00434     if (widget == WID_LGL_SATURATION_FIRST) {
    00435       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_UNUSED, TC_FROMSTRING, SA_HOR_CENTER);
    00436     } else if (widget == WID_LGL_SATURATION_LAST) {
    00437       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_OVERLOADED, TC_FROMSTRING, SA_HOR_CENTER);
    00438     } else if (widget == (WID_LGL_SATURATION_LAST + WID_LGL_SATURATION_FIRST) / 2) {
    00439       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_SATURATED, TC_FROMSTRING, SA_HOR_CENTER);
    00440     }
    00441   }
    00442   if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
    00443     if (this->IsWidgetDisabled(widget)) return;
    00444     CargoSpec *cargo = CargoSpec::Get(widget - WID_LGL_CARGO_FIRST);
    00445     GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, cargo->legend_colour);
    00446     DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y + 2, cargo->abbrev, TC_BLACK, SA_HOR_CENTER);
    00447   }
    00448 }
    00449
    00453 void LinkGraphLegendWindow::UpdateOverlayCompanies()
    00454 {
    00455   uint32 mask = 0;
    00456   for (uint c = 0; c < MAX_COMPANIES; c++) {
    00457     if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
    00458     if (!this->IsWidgetLowered(c + WID_LGL_COMPANY_FIRST)) continue;
    00459     SetBit(mask, c);
    00460   }
    00461   this->overlay->SetCompanyMask(mask);
    00462 }
    00463
    00467 void LinkGraphLegendWindow::UpdateOverlayCargoes()
    00468 {
    00469   uint32 mask = 0;
    00470   for (uint c = 0; c < NUM_CARGO; c++) {
    00471     if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
    00472     if (!this->IsWidgetLowered(c + WID_LGL_CARGO_FIRST)) continue;
    00473     SetBit(mask, c);
    00474   }
    00475   this->overlay->SetCargoMask(mask);
    00476 }
    00477
    00478 void LinkGraphLegendWindow::OnClick(Point pt, int widget, int click_count)
    00479 {
    00480   /* Check which button is clicked */
    00481   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
    00482     if (!this->IsWidgetDisabled(widget)) {
    00483       this->ToggleWidgetLoweredState(widget);
    00484       this->UpdateOverlayCompanies();
    00485     }
    00486   } else if (widget == WID_LGL_COMPANIES_ALL || widget == WID_LGL_COMPANIES_NONE) {
    00487     for (uint c = 0; c < MAX_COMPANIES; c++) {
    00488       if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
    00489       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, widget == WID_LGL_COMPANIES_ALL);
    00490     }
    00491     this->UpdateOverlayCompanies();
    00492     this->SetDirty();
    00493   } else if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
    00494     if (!this->IsWidgetDisabled(widget)) {
    00495       this->ToggleWidgetLoweredState(widget);
    00496       this->UpdateOverlayCargoes();
    00497     }
    00498   } else if (widget == WID_LGL_CARGOES_ALL || widget == WID_LGL_CARGOES_NONE) {
    00499     for (uint c = 0; c < NUM_CARGO; c++) {
    00500       if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
    00501       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, widget == WID_LGL_CARGOES_ALL);
    00502     }
    00503     this->UpdateOverlayCargoes();
    00504   }
    00505   this->SetDirty();
    00506 }
    00507
    00513 void LinkGraphLegendWindow::OnInvalidateData(int data, bool gui_scope)
    00514 {
    00515   /* Disable the companies who are not active */
    00516   for (CompanyID i = COMPANY_FIRST; i < MAX_COMPANIES; i++) {
    00517     this->SetWidgetDisabledState(i + WID_LGL_COMPANY_FIRST, !Company::IsValidID(i));
    00518   }
    00519   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00520     this->SetWidgetDisabledState(i + WID_LGL_CARGO_FIRST, !CargoSpec::Get(i)->IsValid());
    00521   }
    00522 }