# 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   if (this->company_mask == 0) return;
    00055
    00056   DrawPixelInfo dpi;
    00057   this->GetWidgetDpi(&dpi);
    00058
    00059   const Station *sta;
    00060   FOR_ALL_STATIONS(sta) {
    00061     /* Show links between stations of selected companies or "neutral" ones like oilrigs. */
    00062     if (sta->owner != OWNER_NONE && !HasBit(this->company_mask, sta->owner)) continue;
    00063     if (sta->rect.IsEmpty()) continue;
    00064
    00065     Point pta = this->GetStationMiddle(sta);
    00066
    00067     StationID from = sta->index;
    00068     StationLinkMap &seen_links = this->cached_links[from];
    00069
    00070     uint supply = 0;
    00071     CargoID c;
    00072     FOR_EACH_SET_CARGO_ID(c, this->cargo_mask) {
    00073       if (!CargoSpec::Get(c)->IsValid()) continue;
    00074       if (!LinkGraph::IsValidID(sta->goods[c].link_graph)) continue;
    00075       const LinkGraph &lg = *LinkGraph::Get(sta->goods[c].link_graph);
    00076
    00077       ConstNode from_node = lg[sta->goods[c].node];
    00078       supply += lg.Monthly(from_node.Supply());
    00079       for (ConstEdgeIterator i = from_node.Begin(); i != from_node.End(); ++i) {
    00080         StationID to = lg[i->first].Station();
    00081         assert(from != to);
    00082         if (!Station::IsValidID(to) || seen_links.find(to) != seen_links.end()) {
    00083           continue;
    00084         }
    00085         const Station *stb = Station::Get(to);
    00086         assert(sta != stb);
    00087         if (stb->owner != OWNER_NONE && !HasBit(this->company_mask, stb->owner)) continue;
    00088         if (stb->rect.IsEmpty()) continue;
    00089
    00090         if (!this->IsLinkVisible(pta, this->GetStationMiddle(stb), &dpi)) continue;
    00091
    00092         this->AddLinks(sta, stb);
    00093         seen_links[to]; // make sure it is created and marked as seen
    00094       }
    00095     }
    00096     if (this->IsPointVisible(pta, &dpi)) {
    00097       this->cached_stations.push_back(std::make_pair(from, supply));
    00098     }
    00099   }
    00100 }
    00101
    00109 inline bool LinkGraphOverlay::IsPointVisible(Point pt, const DrawPixelInfo *dpi, int padding) const
    00110 {
    00111   return pt.x > dpi->left - padding && pt.y > dpi->top - padding &&
    00112       pt.x < dpi->left + dpi->width + padding &&
    00113       pt.y < dpi->top + dpi->height + padding;
    00114 }
    00115
    00124 inline bool LinkGraphOverlay::IsLinkVisible(Point pta, Point ptb, const DrawPixelInfo *dpi, int padding) const
    00125 {
    00126   return !((pta.x < dpi->left - padding && ptb.x < dpi->left - padding) ||
    00127       (pta.y < dpi->top - padding && ptb.y < dpi->top - padding) ||
    00128       (pta.x > dpi->left + dpi->width + padding &&
    00129           ptb.x > dpi->left + dpi->width + padding) ||
    00130       (pta.y > dpi->top + dpi->height + padding &&
    00131           ptb.y > dpi->top + dpi->height + padding));
    00132 }
    00133
    00139 void LinkGraphOverlay::AddLinks(const Station *from, const Station *to)
    00140 {
    00141   CargoID c;
    00142   FOR_EACH_SET_CARGO_ID(c, this->cargo_mask) {
    00143     if (!CargoSpec::Get(c)->IsValid()) continue;
    00144     const GoodsEntry &ge = from->goods[c];
    00145     if (!LinkGraph::IsValidID(ge.link_graph) ||
    00146         ge.link_graph != to->goods[c].link_graph) {
    00147       continue;
    00148     }
    00149     const LinkGraph &lg = *LinkGraph::Get(ge.link_graph);
    00150     ConstEdge edge = lg[ge.node][to->goods[c].node];
    00151     if (edge.Capacity() > 0) {
    00152       this->AddStats(lg.Monthly(edge.Capacity()), lg.Monthly(edge.Usage()),
    00153           ge.GetSumFlowVia(to->index), this->cached_links[from->index][to->index]);
    00154     }
    00155   }
    00156 }
    00157
    00164 /* static */ void LinkGraphOverlay::AddStats(uint new_cap, uint new_usg, uint new_plan, LinkProperties &cargo)
    00165 {
    00166   /* multiply the numbers by 32 in order to avoid comparing to 0 too often. */
    00167   if (cargo.capacity == 0 ||
    00168       max(cargo.usage, cargo.planned) * 32 / (cargo.capacity + 1) < max(new_usg, new_plan) * 32 / (new_cap + 1)) {
    00169     cargo.capacity = new_cap;
    00170     cargo.usage = new_usg;
    00171     cargo.planned = new_plan;
    00172   }
    00173 }
    00174
    00179 void LinkGraphOverlay::Draw(const DrawPixelInfo *dpi) const
    00180 {
    00181   this->DrawLinks(dpi);
    00182   this->DrawStationDots(dpi);
    00183 }
    00184
    00189 void LinkGraphOverlay::DrawLinks(const DrawPixelInfo *dpi) const
    00190 {
    00191   for (LinkMap::const_iterator i(this->cached_links.begin()); i != this->cached_links.end(); ++i) {
    00192     if (!Station::IsValidID(i->first)) continue;
    00193     Point pta = this->GetStationMiddle(Station::Get(i->first));
    00194     for (StationLinkMap::const_iterator j(i->second.begin()); j != i->second.end(); ++j) {
    00195       if (!Station::IsValidID(j->first)) continue;
    00196       Point ptb = this->GetStationMiddle(Station::Get(j->first));
    00197       if (!this->IsLinkVisible(pta, ptb, dpi, this->scale + 2)) continue;
    00198       this->DrawContent(pta, ptb, j->second);
    00199     }
    00200   }
    00201 }
    00202
    00209 void LinkGraphOverlay::DrawContent(Point pta, Point ptb, const LinkProperties &cargo) const
    00210 {
    00211   int offset_y = (pta.x < ptb.x ? 1 : -1) * this->scale;
    00212   int offset_x = (pta.y > ptb.y ? 1 : -1) * this->scale;
    00213
    00214   uint usage_or_plan = min(cargo.capacity * 2 + 1, max(cargo.usage, cargo.planned));
    00215   int colour = LinkGraphOverlay::LINK_COLOURS[usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS) / (cargo.capacity * 2 + 2)];
    00216
    00217   GfxDrawLine(pta.x + offset_x, pta.y, ptb.x + offset_x, ptb.y, colour, scale);
    00218   GfxDrawLine(pta.x, pta.y + offset_y, ptb.x, ptb.y + offset_y, colour, scale);
    00219
    00220   GfxDrawLine(pta.x, pta.y, ptb.x, ptb.y, _colour_gradient[COLOUR_GREY][1], this->scale);
    00221 }
    00222
    00227 void LinkGraphOverlay::DrawStationDots(const DrawPixelInfo *dpi) const
    00228 {
    00229   for (StationSupplyList::const_iterator i(this->cached_stations.begin()); i != this->cached_stations.end(); ++i) {
    00230     const Station *st = Station::GetIfValid(i->first);
    00231     if (st == NULL) continue;
    00232     Point pt = this->GetStationMiddle(st);
    00233     if (!this->IsPointVisible(pt, dpi, 3 * this->scale)) continue;
    00234
    00235     uint r = this->scale * 2 + this->scale * 2 * min(200, i->second) / 200;
    00236
    00237     LinkGraphOverlay::DrawVertex(pt.x, pt.y, r,
    00238         _colour_gradient[st->owner != OWNER_NONE ?
    00239             (Colours)Company::Get(st->owner)->colour : COLOUR_GREY][5],
    00240         _colour_gradient[COLOUR_GREY][1]);
    00241   }
    00242 }
    00243
    00252 /* static */ void LinkGraphOverlay::DrawVertex(int x, int y, int size, int colour, int border_colour)
    00253 {
    00254   size--;
    00255   int w1 = size / 2;
    00256   int w2 = size / 2 + size % 2;
    00257
    00258   GfxFillRect(x - w1, y - w1, x + w2, y + w2, colour);
    00259
    00260   w1++;
    00261   w2++;
    00262   GfxDrawLine(x - w1, y - w1, x + w2, y - w1, border_colour);
    00263   GfxDrawLine(x - w1, y + w2, x + w2, y + w2, border_colour);
    00264   GfxDrawLine(x - w1, y - w1, x - w1, y + w2, border_colour);
    00265   GfxDrawLine(x + w2, y - w1, x + w2, y + w2, border_colour);
    00266 }
    00267
    00273 Point LinkGraphOverlay::GetStationMiddle(const Station *st) const {
    00274   if (this->window->viewport != NULL) {
    00275     return GetViewportStationMiddle(this->window->viewport, st);
    00276   } else {
    00277     /* assume this is a smallmap */
    00278     return static_cast<const SmallMapWindow *>(this->window)->GetStationMiddle(st);
    00279   }
    00280 }
    00281
    00286 void LinkGraphOverlay::SetCargoMask(uint32 cargo_mask)
    00287 {
    00288   this->cargo_mask = cargo_mask;
    00289   this->RebuildCache();
    00290   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
    00291 }
    00292
    00297 void LinkGraphOverlay::SetCompanyMask(uint32 company_mask)
    00298 {
    00299   this->company_mask = company_mask;
    00300   this->RebuildCache();
    00301   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
    00302 }
    00303
    00305 NWidgetBase *MakeCompanyButtonRowsLinkGraphGUI(int *biggest_index)
    00306 {
    00307   return MakeCompanyButtonRows(biggest_index, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST, 3, STR_LINKGRAPH_LEGEND_SELECT_COMPANIES);
    00308 }
    00309
    00310 NWidgetBase *MakeSaturationLegendLinkGraphGUI(int *biggest_index)
    00311 {
    00312   NWidgetVertical *panel = new NWidgetVertical();
    00313   for (uint i = 0; i < lengthof(LinkGraphOverlay::LINK_COLOURS); ++i) {
    00314     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_DARK_GREEN, i + WID_LGL_SATURATION_FIRST);
    00315     wid->SetMinimalSize(50, FONT_HEIGHT_SMALL);
    00316     wid->SetFill(0, 1);
    00317     wid->SetResize(0, 1);
    00318     panel->Add(wid);
    00319   }
    00320   *biggest_index = WID_LGL_SATURATION_LAST;
    00321   return panel;
    00322 }
    00323
    00324 NWidgetBase *MakeCargoesLegendLinkGraphGUI(int *biggest_index)
    00325 {
    00326   static const uint ENTRIES_PER_ROW = CeilDiv(NUM_CARGO, 5);
    00327   NWidgetVertical *panel = new NWidgetVertical();
    00328   NWidgetHorizontal *row = NULL;
    00329   for (uint i = 0; i < NUM_CARGO; ++i) {
    00330     if (i % ENTRIES_PER_ROW == 0) {
    00331       if (row) panel->Add(row);
    00332       row = new NWidgetHorizontal();
    00333     }
    00334     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_GREY, i + WID_LGL_CARGO_FIRST);
    00335     wid->SetMinimalSize(25, FONT_HEIGHT_SMALL);
    00336     wid->SetFill(0, 1);
    00337     wid->SetResize(0, 1);
    00338     row->Add(wid);
    00339   }
    00340   panel->Add(row);
    00341   *biggest_index = WID_LGL_CARGO_LAST;
    00342   return panel;
    00343 }
    00344
    00345
    00346 static const NWidgetPart _nested_linkgraph_legend_widgets[] = {
    00347   NWidget(NWID_HORIZONTAL),
    00348     NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
    00349     NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, WID_LGL_CAPTION), SetDataTip(STR_LINKGRAPH_LEGEND_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    00350     NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
    00351     NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
    00352   EndContainer(),
    00353   NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
    00354     NWidget(NWID_HORIZONTAL),
    00355       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_SATURATION),
    00356         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00357         SetMinimalSize(50, 100),
    00358         NWidgetFunction(MakeSaturationLegendLinkGraphGUI),
    00359       EndContainer(),
    00360       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_COMPANIES),
    00361         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00362         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
    00363           SetMinimalSize(100, 100),
    00364           NWidgetFunction(MakeCompanyButtonRowsLinkGraphGUI),
    00365           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
    00366           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
    00367         EndContainer(),
    00368       EndContainer(),
    00369       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_CARGOES),
    00370         SetPadding(WD_FRAMERECT_TOP, WD_FRAMERECT_RIGHT, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
    00371         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
    00372           SetMinimalSize(150, 100),
    00373           NWidgetFunction(MakeCargoesLegendLinkGraphGUI),
    00374           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
    00375           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
    00376         EndContainer(),
    00377       EndContainer(),
    00378     EndContainer(),
    00379   EndContainer()
    00380 };
    00381
    00382 assert_compile(WID_LGL_SATURATION_LAST - WID_LGL_SATURATION_FIRST ==
    00383     lengthof(LinkGraphOverlay::LINK_COLOURS) - 1);
    00384
    00385 static const WindowDesc _linkgraph_legend_desc(
    00386   WDP_MANUAL, 300, 314,
    00387   WC_LINKGRAPH_LEGEND, WC_NONE,
    00388   0,
    00389   _nested_linkgraph_legend_widgets, lengthof(_nested_linkgraph_legend_widgets)
    00390 );
    00391
    00395 void ShowLinkGraphLegend()
    00396 {
    00397   AllocateWindowDescFront<LinkGraphLegendWindow>(&_linkgraph_legend_desc, 0);
    00398 }
    00399
    00400 LinkGraphLegendWindow::LinkGraphLegendWindow(const WindowDesc *desc, int window_number)
    00401 {
    00402   this->InitNested(desc, window_number);
    00403   this->InvalidateData(0);
    00404   this->SetOverlay(FindWindowById(WC_MAIN_WINDOW, 0)->viewport->overlay);
    00405 }
    00406
    00411 void LinkGraphLegendWindow::SetOverlay(LinkGraphOverlay *overlay) {
    00412   this->overlay = overlay;
    00413   uint32 companies = this->overlay->GetCompanyMask();
    00414   for (uint c = 0; c < MAX_COMPANIES; c++) {
    00415     if (!this->IsWidgetDisabled(WID_LGL_COMPANY_FIRST + c)) {
    00416       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, HasBit(companies, c));
    00417     }
    00418   }
    00419   uint32 cargoes = this->overlay->GetCargoMask();
    00420   for (uint c = 0; c < NUM_CARGO; c++) {
    00421     if (!this->IsWidgetDisabled(WID_LGL_CARGO_FIRST + c)) {
    00422       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, HasBit(cargoes, c));
    00423     }
    00424   }
    00425 }
    00426
    00427 void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
    00428 {
    00429   const NWidgetBase *wid = this->GetWidget<NWidgetBase>(widget);
    00430   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
    00431     if (this->IsWidgetDisabled(widget)) return;
    00432     CompanyID cid = (CompanyID)(widget - WID_LGL_COMPANY_FIRST);
    00433     Dimension sprite_size = GetSpriteSize(SPR_COMPANY_ICON);
    00434     DrawCompanyIcon(cid, (r.left + r.right - sprite_size.width) / 2, (r.top + r.bottom - sprite_size.height) / 2);
    00435     return;
    00436   }
    00437   if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
    00438     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, LinkGraphOverlay::LINK_COLOURS[widget - WID_LGL_SATURATION_FIRST]);
    00439     if (widget == WID_LGL_SATURATION_FIRST) {
    00440       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_UNUSED, TC_FROMSTRING, SA_HOR_CENTER);
    00441     } else if (widget == WID_LGL_SATURATION_LAST) {
    00442       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_OVERLOADED, TC_FROMSTRING, SA_HOR_CENTER);
    00443     } else if (widget == (WID_LGL_SATURATION_LAST + WID_LGL_SATURATION_FIRST) / 2) {
    00444       DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y, STR_LINKGRAPH_LEGEND_SATURATED, TC_FROMSTRING, SA_HOR_CENTER);
    00445     }
    00446   }
    00447   if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
    00448     if (this->IsWidgetDisabled(widget)) return;
    00449     CargoSpec *cargo = CargoSpec::Get(widget - WID_LGL_CARGO_FIRST);
    00450     GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, cargo->legend_colour);
    00451     DrawString(wid->pos_x, wid->current_x + wid->pos_x, wid->pos_y + 2, cargo->abbrev, TC_BLACK, SA_HOR_CENTER);
    00452   }
    00453 }
    00454
    00458 void LinkGraphLegendWindow::UpdateOverlayCompanies()
    00459 {
    00460   uint32 mask = 0;
    00461   for (uint c = 0; c < MAX_COMPANIES; c++) {
    00462     if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
    00463     if (!this->IsWidgetLowered(c + WID_LGL_COMPANY_FIRST)) continue;
    00464     SetBit(mask, c);
    00465   }
    00466   this->overlay->SetCompanyMask(mask);
    00467 }
    00468
    00472 void LinkGraphLegendWindow::UpdateOverlayCargoes()
    00473 {
    00474   uint32 mask = 0;
    00475   for (uint c = 0; c < NUM_CARGO; c++) {
    00476     if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
    00477     if (!this->IsWidgetLowered(c + WID_LGL_CARGO_FIRST)) continue;
    00478     SetBit(mask, c);
    00479   }
    00480   this->overlay->SetCargoMask(mask);
    00481 }
    00482
    00483 void LinkGraphLegendWindow::OnClick(Point pt, int widget, int click_count)
    00484 {
    00485   /* Check which button is clicked */
    00486   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
    00487     if (!this->IsWidgetDisabled(widget)) {
    00488       this->ToggleWidgetLoweredState(widget);
    00489       this->UpdateOverlayCompanies();
    00490     }
    00491   } else if (widget == WID_LGL_COMPANIES_ALL || widget == WID_LGL_COMPANIES_NONE) {
    00492     for (uint c = 0; c < MAX_COMPANIES; c++) {
    00493       if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
    00494       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, widget == WID_LGL_COMPANIES_ALL);
    00495     }
    00496     this->UpdateOverlayCompanies();
    00497     this->SetDirty();
    00498   } else if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
    00499     if (!this->IsWidgetDisabled(widget)) {
    00500       this->ToggleWidgetLoweredState(widget);
    00501       this->UpdateOverlayCargoes();
    00502     }
    00503   } else if (widget == WID_LGL_CARGOES_ALL || widget == WID_LGL_CARGOES_NONE) {
    00504     for (uint c = 0; c < NUM_CARGO; c++) {
    00505       if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
    00506       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, widget == WID_LGL_CARGOES_ALL);
    00507     }
    00508     this->UpdateOverlayCargoes();
    00509   }
    00510   this->SetDirty();
    00511 }
    00512
    00518 void LinkGraphLegendWindow::OnInvalidateData(int data, bool gui_scope)
    00519 {
    00520   /* Disable the companies who are not active */
    00521   for (CompanyID i = COMPANY_FIRST; i < MAX_COMPANIES; i++) {
    00522     this->SetWidgetDisabledState(i + WID_LGL_COMPANY_FIRST, !Company::IsValidID(i));
    00523   }
    00524   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00525     this->SetWidgetDisabledState(i + WID_LGL_CARGO_FIRST, !CargoSpec::Get(i)->IsValid());
    00526   }
    00527 }