linkgraph_gui.cpp

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00001 /* $Id: linkgraph_gui.cpp 25912 2013-10-23 19:42:17Z fonsinchen $ */
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_gui.h"
00014 #include "../window_func.h"
00015 #include "../company_base.h"
00016 #include "../company_gui.h"
00017 #include "../date_func.h"
00018 #include "../viewport_func.h"
00019 #include "../smallmap_gui.h"
00020 #include "../core/geometry_func.hpp"
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     if (sta->rect.IsEmpty()) continue;
00062 
00063     Point pta = this->GetStationMiddle(sta);
00064 
00065     StationID from = sta->index;
00066     StationLinkMap &seen_links = this->cached_links[from];
00067 
00068     uint supply = 0;
00069     CargoID c;
00070     FOR_EACH_SET_CARGO_ID(c, this->cargo_mask) {
00071       if (!CargoSpec::Get(c)->IsValid()) continue;
00072       if (!LinkGraph::IsValidID(sta->goods[c].link_graph)) continue;
00073       const LinkGraph &lg = *LinkGraph::Get(sta->goods[c].link_graph);
00074 
00075       ConstNode from_node = lg[sta->goods[c].node];
00076       supply += lg.Monthly(from_node.Supply());
00077       for (ConstEdgeIterator i = from_node.Begin(); i != from_node.End(); ++i) {
00078         StationID to = lg[i->first].Station();
00079         assert(from != to);
00080         if (!Station::IsValidID(to) || seen_links.find(to) != seen_links.end()) {
00081           continue;
00082         }
00083         const Station *stb = Station::Get(to);
00084         assert(sta != stb);
00085 
00086         /* Show links between stations of selected companies or "neutral" ones like oilrigs. */
00087         if (stb->owner != OWNER_NONE && sta->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), from->owner == OWNER_NONE || to->owner == OWNER_NONE,
00154           this->cached_links[from->index][to->index]);
00155     }
00156   }
00157 }
00158 
00169 /* static */ void LinkGraphOverlay::AddStats(uint new_cap, uint new_usg, uint new_plan, bool new_shared, LinkProperties &cargo)
00170 {
00171   /* multiply the numbers by 32 in order to avoid comparing to 0 too often. */
00172   if (cargo.capacity == 0 ||
00173       max(cargo.usage, cargo.planned) * 32 / (cargo.capacity + 1) < max(new_usg, new_plan) * 32 / (new_cap + 1)) {
00174     cargo.capacity = new_cap;
00175     cargo.usage = new_usg;
00176     cargo.planned = new_plan;
00177   }
00178   if (new_shared) cargo.shared = true;
00179 }
00180 
00185 void LinkGraphOverlay::Draw(const DrawPixelInfo *dpi) const
00186 {
00187   this->DrawLinks(dpi);
00188   this->DrawStationDots(dpi);
00189 }
00190 
00195 void LinkGraphOverlay::DrawLinks(const DrawPixelInfo *dpi) const
00196 {
00197   for (LinkMap::const_iterator i(this->cached_links.begin()); i != this->cached_links.end(); ++i) {
00198     if (!Station::IsValidID(i->first)) continue;
00199     Point pta = this->GetStationMiddle(Station::Get(i->first));
00200     for (StationLinkMap::const_iterator j(i->second.begin()); j != i->second.end(); ++j) {
00201       if (!Station::IsValidID(j->first)) continue;
00202       Point ptb = this->GetStationMiddle(Station::Get(j->first));
00203       if (!this->IsLinkVisible(pta, ptb, dpi, this->scale + 2)) continue;
00204       this->DrawContent(pta, ptb, j->second);
00205     }
00206   }
00207 }
00208 
00215 void LinkGraphOverlay::DrawContent(Point pta, Point ptb, const LinkProperties &cargo) const
00216 {
00217   uint usage_or_plan = min(cargo.capacity * 2 + 1, max(cargo.usage, cargo.planned));
00218   int colour = LinkGraphOverlay::LINK_COLOURS[usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS) / (cargo.capacity * 2 + 2)];
00219   int dash = cargo.shared ? this->scale * 4 : 0;
00220 
00221   /* Move line a bit 90° against its dominant direction to prevent it from
00222    * being hidden below the grey line. */
00223   if (abs(pta.x - ptb.x) < abs(pta.y - ptb.y)) {
00224     int offset_x = (pta.y > ptb.y ? 1 : -1) * this->scale;
00225     GfxDrawLine(pta.x + offset_x, pta.y, ptb.x + offset_x, ptb.y, colour, this->scale, dash);
00226   } else {
00227     int offset_y = (pta.x < ptb.x ? 1 : -1) * this->scale;
00228     GfxDrawLine(pta.x, pta.y + offset_y, ptb.x, ptb.y + offset_y, colour, this->scale, dash);
00229   }
00230 
00231   GfxDrawLine(pta.x, pta.y, ptb.x, ptb.y, _colour_gradient[COLOUR_GREY][1], this->scale);
00232 }
00233 
00238 void LinkGraphOverlay::DrawStationDots(const DrawPixelInfo *dpi) const
00239 {
00240   for (StationSupplyList::const_iterator i(this->cached_stations.begin()); i != this->cached_stations.end(); ++i) {
00241     const Station *st = Station::GetIfValid(i->first);
00242     if (st == NULL) continue;
00243     Point pt = this->GetStationMiddle(st);
00244     if (!this->IsPointVisible(pt, dpi, 3 * this->scale)) continue;
00245 
00246     uint r = this->scale * 2 + this->scale * 2 * min(200, i->second) / 200;
00247 
00248     LinkGraphOverlay::DrawVertex(pt.x, pt.y, r,
00249         _colour_gradient[st->owner != OWNER_NONE ?
00250             (Colours)Company::Get(st->owner)->colour : COLOUR_GREY][5],
00251         _colour_gradient[COLOUR_GREY][1]);
00252   }
00253 }
00254 
00263 /* static */ void LinkGraphOverlay::DrawVertex(int x, int y, int size, int colour, int border_colour)
00264 {
00265   size--;
00266   int w1 = size / 2;
00267   int w2 = size / 2 + size % 2;
00268 
00269   GfxFillRect(x - w1, y - w1, x + w2, y + w2, colour);
00270 
00271   w1++;
00272   w2++;
00273   GfxDrawLine(x - w1, y - w1, x + w2, y - w1, border_colour);
00274   GfxDrawLine(x - w1, y + w2, x + w2, y + w2, border_colour);
00275   GfxDrawLine(x - w1, y - w1, x - w1, y + w2, border_colour);
00276   GfxDrawLine(x + w2, y - w1, x + w2, y + w2, border_colour);
00277 }
00278 
00284 Point LinkGraphOverlay::GetStationMiddle(const Station *st) const
00285 {
00286   if (this->window->viewport != NULL) {
00287     return GetViewportStationMiddle(this->window->viewport, st);
00288   } else {
00289     /* assume this is a smallmap */
00290     return static_cast<const SmallMapWindow *>(this->window)->GetStationMiddle(st);
00291   }
00292 }
00293 
00298 void LinkGraphOverlay::SetCargoMask(uint32 cargo_mask)
00299 {
00300   this->cargo_mask = cargo_mask;
00301   this->RebuildCache();
00302   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
00303 }
00304 
00309 void LinkGraphOverlay::SetCompanyMask(uint32 company_mask)
00310 {
00311   this->company_mask = company_mask;
00312   this->RebuildCache();
00313   this->window->GetWidget<NWidgetBase>(this->widget_id)->SetDirty(this->window);
00314 }
00315 
00317 NWidgetBase *MakeCompanyButtonRowsLinkGraphGUI(int *biggest_index)
00318 {
00319   return MakeCompanyButtonRows(biggest_index, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST, 3, STR_LINKGRAPH_LEGEND_SELECT_COMPANIES);
00320 }
00321 
00322 NWidgetBase *MakeSaturationLegendLinkGraphGUI(int *biggest_index)
00323 {
00324   NWidgetVertical *panel = new NWidgetVertical(NC_EQUALSIZE);
00325   for (uint i = 0; i < lengthof(LinkGraphOverlay::LINK_COLOURS); ++i) {
00326     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_DARK_GREEN, i + WID_LGL_SATURATION_FIRST);
00327     wid->SetMinimalSize(50, FONT_HEIGHT_SMALL);
00328     wid->SetFill(1, 1);
00329     wid->SetResize(0, 0);
00330     panel->Add(wid);
00331   }
00332   *biggest_index = WID_LGL_SATURATION_LAST;
00333   return panel;
00334 }
00335 
00336 NWidgetBase *MakeCargoesLegendLinkGraphGUI(int *biggest_index)
00337 {
00338   static const uint ENTRIES_PER_ROW = CeilDiv(NUM_CARGO, 5);
00339   NWidgetVertical *panel = new NWidgetVertical(NC_EQUALSIZE);
00340   NWidgetHorizontal *row = NULL;
00341   for (uint i = 0; i < NUM_CARGO; ++i) {
00342     if (i % ENTRIES_PER_ROW == 0) {
00343       if (row) panel->Add(row);
00344       row = new NWidgetHorizontal(NC_EQUALSIZE);
00345     }
00346     NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_GREY, i + WID_LGL_CARGO_FIRST);
00347     wid->SetMinimalSize(25, FONT_HEIGHT_SMALL);
00348     wid->SetFill(1, 1);
00349     wid->SetResize(0, 0);
00350     row->Add(wid);
00351   }
00352   /* Fill up last row */
00353   for (uint i = 0; i < 4 - (NUM_CARGO - 1) % 5; ++i) {
00354     NWidgetSpacer *spc = new NWidgetSpacer(25, FONT_HEIGHT_SMALL);
00355     spc->SetFill(1, 1);
00356     spc->SetResize(0, 0);
00357     row->Add(spc);
00358   }
00359   panel->Add(row);
00360   *biggest_index = WID_LGL_CARGO_LAST;
00361   return panel;
00362 }
00363 
00364 
00365 static const NWidgetPart _nested_linkgraph_legend_widgets[] = {
00366   NWidget(NWID_HORIZONTAL),
00367     NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN),
00368     NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, WID_LGL_CAPTION), SetDataTip(STR_LINKGRAPH_LEGEND_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
00369     NWidget(WWT_SHADEBOX, COLOUR_DARK_GREEN),
00370     NWidget(WWT_STICKYBOX, COLOUR_DARK_GREEN),
00371   EndContainer(),
00372   NWidget(WWT_PANEL, COLOUR_DARK_GREEN),
00373     NWidget(NWID_HORIZONTAL),
00374       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_SATURATION),
00375         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
00376         NWidgetFunction(MakeSaturationLegendLinkGraphGUI),
00377       EndContainer(),
00378       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_COMPANIES),
00379         SetPadding(WD_FRAMERECT_TOP, 0, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
00380         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
00381           NWidgetFunction(MakeCompanyButtonRowsLinkGraphGUI),
00382           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
00383           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_COMPANIES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
00384         EndContainer(),
00385       EndContainer(),
00386       NWidget(WWT_PANEL, COLOUR_DARK_GREEN, WID_LGL_CARGOES),
00387         SetPadding(WD_FRAMERECT_TOP, WD_FRAMERECT_RIGHT, WD_FRAMERECT_BOTTOM, WD_CAPTIONTEXT_LEFT),
00388         NWidget(NWID_VERTICAL, NC_EQUALSIZE),
00389           NWidgetFunction(MakeCargoesLegendLinkGraphGUI),
00390           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_ALL), SetDataTip(STR_LINKGRAPH_LEGEND_ALL, STR_NULL),
00391           NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_LGL_CARGOES_NONE), SetDataTip(STR_LINKGRAPH_LEGEND_NONE, STR_NULL),
00392         EndContainer(),
00393       EndContainer(),
00394     EndContainer(),
00395   EndContainer()
00396 };
00397 
00398 assert_compile(WID_LGL_SATURATION_LAST - WID_LGL_SATURATION_FIRST ==
00399     lengthof(LinkGraphOverlay::LINK_COLOURS) - 1);
00400 
00401 static WindowDesc _linkgraph_legend_desc(
00402   WDP_AUTO, "toolbar_linkgraph", 0, 0,
00403   WC_LINKGRAPH_LEGEND, WC_NONE,
00404   0,
00405   _nested_linkgraph_legend_widgets, lengthof(_nested_linkgraph_legend_widgets)
00406 );
00407 
00411 void ShowLinkGraphLegend()
00412 {
00413   AllocateWindowDescFront<LinkGraphLegendWindow>(&_linkgraph_legend_desc, 0);
00414 }
00415 
00416 LinkGraphLegendWindow::LinkGraphLegendWindow(WindowDesc *desc, int window_number) : Window(desc)
00417 {
00418   this->InitNested(window_number);
00419   this->InvalidateData(0);
00420   this->SetOverlay(FindWindowById(WC_MAIN_WINDOW, 0)->viewport->overlay);
00421 }
00422 
00427 void LinkGraphLegendWindow::SetOverlay(LinkGraphOverlay *overlay) {
00428   this->overlay = overlay;
00429   uint32 companies = this->overlay->GetCompanyMask();
00430   for (uint c = 0; c < MAX_COMPANIES; c++) {
00431     if (!this->IsWidgetDisabled(WID_LGL_COMPANY_FIRST + c)) {
00432       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, HasBit(companies, c));
00433     }
00434   }
00435   uint32 cargoes = this->overlay->GetCargoMask();
00436   for (uint c = 0; c < NUM_CARGO; c++) {
00437     if (!this->IsWidgetDisabled(WID_LGL_CARGO_FIRST + c)) {
00438       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, HasBit(cargoes, c));
00439     }
00440   }
00441 }
00442 
00443 void LinkGraphLegendWindow::UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
00444 {
00445   if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
00446     StringID str = STR_NULL;
00447     if (widget == WID_LGL_SATURATION_FIRST) {
00448       str = STR_LINKGRAPH_LEGEND_UNUSED;
00449     } else if (widget == WID_LGL_SATURATION_LAST) {
00450       str = STR_LINKGRAPH_LEGEND_OVERLOADED;
00451     } else if (widget == (WID_LGL_SATURATION_LAST + WID_LGL_SATURATION_FIRST) / 2) {
00452       str = STR_LINKGRAPH_LEGEND_SATURATED;
00453     }
00454     if (str != STR_NULL) {
00455       Dimension dim = GetStringBoundingBox(str);
00456       dim.width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
00457       dim.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
00458       *size = maxdim(*size, dim);
00459     }
00460   }
00461   if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
00462     CargoSpec *cargo = CargoSpec::Get(widget - WID_LGL_CARGO_FIRST);
00463     if (cargo->IsValid()) {
00464       Dimension dim = GetStringBoundingBox(cargo->abbrev);
00465       dim.width += WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
00466       dim.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
00467       *size = maxdim(*size, dim);
00468     }
00469   }
00470 }
00471 
00472 void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
00473 {
00474   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
00475     if (this->IsWidgetDisabled(widget)) return;
00476     CompanyID cid = (CompanyID)(widget - WID_LGL_COMPANY_FIRST);
00477     Dimension sprite_size = GetSpriteSize(SPR_COMPANY_ICON);
00478     DrawCompanyIcon(cid, (r.left + r.right + 1 - sprite_size.width) / 2, (r.top + r.bottom + 1 - sprite_size.height) / 2);
00479   }
00480   if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
00481     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, LinkGraphOverlay::LINK_COLOURS[widget - WID_LGL_SATURATION_FIRST]);
00482     StringID str = STR_NULL;
00483     if (widget == WID_LGL_SATURATION_FIRST) {
00484       str = STR_LINKGRAPH_LEGEND_UNUSED;
00485     } else if (widget == WID_LGL_SATURATION_LAST) {
00486       str = STR_LINKGRAPH_LEGEND_OVERLOADED;
00487     } else if (widget == (WID_LGL_SATURATION_LAST + WID_LGL_SATURATION_FIRST) / 2) {
00488       str = STR_LINKGRAPH_LEGEND_SATURATED;
00489     }
00490     if (str != STR_NULL) DrawString(r.left, r.right, (r.top + r.bottom + 1 - FONT_HEIGHT_SMALL) / 2, str, TC_FROMSTRING, SA_HOR_CENTER);
00491   }
00492   if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
00493     if (this->IsWidgetDisabled(widget)) return;
00494     CargoSpec *cargo = CargoSpec::Get(widget - WID_LGL_CARGO_FIRST);
00495     GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, cargo->legend_colour);
00496     DrawString(r.left, r.right, (r.top + r.bottom + 1 - FONT_HEIGHT_SMALL) / 2, cargo->abbrev, TC_BLACK, SA_HOR_CENTER);
00497   }
00498 }
00499 
00503 void LinkGraphLegendWindow::UpdateOverlayCompanies()
00504 {
00505   uint32 mask = 0;
00506   for (uint c = 0; c < MAX_COMPANIES; c++) {
00507     if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
00508     if (!this->IsWidgetLowered(c + WID_LGL_COMPANY_FIRST)) continue;
00509     SetBit(mask, c);
00510   }
00511   this->overlay->SetCompanyMask(mask);
00512 }
00513 
00517 void LinkGraphLegendWindow::UpdateOverlayCargoes()
00518 {
00519   uint32 mask = 0;
00520   for (uint c = 0; c < NUM_CARGO; c++) {
00521     if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
00522     if (!this->IsWidgetLowered(c + WID_LGL_CARGO_FIRST)) continue;
00523     SetBit(mask, c);
00524   }
00525   this->overlay->SetCargoMask(mask);
00526 }
00527 
00528 void LinkGraphLegendWindow::OnClick(Point pt, int widget, int click_count)
00529 {
00530   /* Check which button is clicked */
00531   if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
00532     if (!this->IsWidgetDisabled(widget)) {
00533       this->ToggleWidgetLoweredState(widget);
00534       this->UpdateOverlayCompanies();
00535     }
00536   } else if (widget == WID_LGL_COMPANIES_ALL || widget == WID_LGL_COMPANIES_NONE) {
00537     for (uint c = 0; c < MAX_COMPANIES; c++) {
00538       if (this->IsWidgetDisabled(c + WID_LGL_COMPANY_FIRST)) continue;
00539       this->SetWidgetLoweredState(WID_LGL_COMPANY_FIRST + c, widget == WID_LGL_COMPANIES_ALL);
00540     }
00541     this->UpdateOverlayCompanies();
00542     this->SetDirty();
00543   } else if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
00544     if (!this->IsWidgetDisabled(widget)) {
00545       this->ToggleWidgetLoweredState(widget);
00546       this->UpdateOverlayCargoes();
00547     }
00548   } else if (widget == WID_LGL_CARGOES_ALL || widget == WID_LGL_CARGOES_NONE) {
00549     for (uint c = 0; c < NUM_CARGO; c++) {
00550       if (this->IsWidgetDisabled(c + WID_LGL_CARGO_FIRST)) continue;
00551       this->SetWidgetLoweredState(WID_LGL_CARGO_FIRST + c, widget == WID_LGL_CARGOES_ALL);
00552     }
00553     this->UpdateOverlayCargoes();
00554   }
00555   this->SetDirty();
00556 }
00557 
00563 void LinkGraphLegendWindow::OnInvalidateData(int data, bool gui_scope)
00564 {
00565   /* Disable the companies who are not active */
00566   for (CompanyID i = COMPANY_FIRST; i < MAX_COMPANIES; i++) {
00567     this->SetWidgetDisabledState(i + WID_LGL_COMPANY_FIRST, !Company::IsValidID(i));
00568   }
00569   for (CargoID i = 0; i < NUM_CARGO; i++) {
00570     this->SetWidgetDisabledState(i + WID_LGL_CARGO_FIRST, !CargoSpec::Get(i)->IsValid());
00571   }
00572 }