Add setting for alternative linkgraph overlay colour schemes

src/lang/english.txt

@@ -1374,6 +1374,13 @@ STR_CONFIG_SETTING_SHOW_DEPOT_SELL_GUI_HELPTEXT                 :Show go to depo
 STR_CONFIG_SETTING_OPEN_VEHICLE_GUI_CLONE_SHARE                 :Open new vehicle window when share-cloning: {STRING2}
 STR_CONFIG_SETTING_OPEN_VEHICLE_GUI_CLONE_SHARE_HELPTEXT        :When enabled, open the newly cloned vehicle's window when cloning a vehicle with shared orders from the depot window.
 
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS                            :Cargo flow overlay colours: {STRING2}
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS_HELPTEXT                   :Set the colour the scheme used for the cargo flow overlay.
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS_GREEN_TO_RED               :Green to red (original)
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS_GREEN_TO_BLUE              :Green to blue
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS_GREY_TO_RED                :Grey to red
+STR_CONFIG_SETTING_LINKGRAPH_COLOURS_GREYSCALE                  :Greyscale
+
 STR_CONFIG_SETTING_ADV_SIG_BRIDGE_TUN_MODES                     :Enable signals on bridges/tunnels advanced modes: {STRING2}
 STR_CONFIG_SETTING_ADV_SIG_BRIDGE_TUN_MODES_HELPTEXT            :Enables use of advanced modes of signal simulation on bridges and tunnels. When disabled, bridges/tunnels which are not already in an advanced mode cannot be changed to an advanced mode, however other players may choose to enable this setting and use an advanced mode.
 

src/linkgraph/linkgraph_gui.cpp

@@ -31,10 +31,27 @@
  * Colours for the various "load" states of links. Ordered from "unused" to
  * "overloaded".
  */
-const uint8 LinkGraphOverlay::LINK_COLOURS[] = {
+const uint8 LinkGraphOverlay::LINK_COLOURS[][12] = {
+{
 	0x0f, 0xd1, 0xd0, 0x57,
 	0x55, 0x53, 0xbf, 0xbd,
 	0xba, 0xb9, 0xb7, 0xb5
+},
+{
+	0x0f, 0xd1, 0xd0, 0x57,
+	0x55, 0x53, 0x96, 0x95,
+	0x94, 0x93, 0x92, 0x91
+},
+{
+	0x0f, 0x0b, 0x09, 0x07,
+	0x05, 0x03, 0xbf, 0xbd,
+	0xba, 0xb9, 0xb7, 0xb5
+},
+{
+	0x0f, 0x0b, 0x0a, 0x09,
+	0x08, 0x07, 0x06, 0x05,
+	0x04, 0x03, 0x02, 0x01
+}
 };
 
 /**
@@ -377,7 +394,7 @@ void LinkGraphOverlay::DrawLinks(const DrawPixelInfo *dpi) const
 void LinkGraphOverlay::DrawContent(Point pta, Point ptb, const LinkProperties &cargo) const
 {
 	uint usage_or_plan = min(cargo.capacity * 2 + 1, max(cargo.usage, cargo.planned));
-	int colour = LinkGraphOverlay::LINK_COLOURS[usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS) / (cargo.capacity * 2 + 2)];
+	int colour = LinkGraphOverlay::LINK_COLOURS[_settings_client.gui.linkgraph_colours][usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS[0]) / (cargo.capacity * 2 + 2)];
 	int dash = cargo.shared ? this->scale * 4 : 0;
 
 	/* Move line a bit 90° against its dominant direction to prevent it from
@@ -486,7 +503,7 @@ NWidgetBase *MakeCompanyButtonRowsLinkGraphGUI(int *biggest_index)
 NWidgetBase *MakeSaturationLegendLinkGraphGUI(int *biggest_index)
 {
 	NWidgetVertical *panel = new NWidgetVertical(NC_EQUALSIZE);
-	for (uint i = 0; i < lengthof(LinkGraphOverlay::LINK_COLOURS); ++i) {
+	for (uint i = 0; i < lengthof(LinkGraphOverlay::LINK_COLOURS[0]); ++i) {
 		NWidgetBackground * wid = new NWidgetBackground(WWT_PANEL, COLOUR_DARK_GREEN, i + WID_LGL_SATURATION_FIRST);
 		wid->SetMinimalSize(50, FONT_HEIGHT_SMALL);
 		wid->SetFill(1, 1);
@@ -560,7 +577,7 @@ static const NWidgetPart _nested_linkgraph_legend_widgets[] = {
 };
 
 assert_compile(WID_LGL_SATURATION_LAST - WID_LGL_SATURATION_FIRST ==
-		lengthof(LinkGraphOverlay::LINK_COLOURS) - 1);
+		lengthof(LinkGraphOverlay::LINK_COLOURS[0]) - 1);
 
 static WindowDesc _linkgraph_legend_desc(
 	WDP_AUTO, "toolbar_linkgraph", 0, 0,
@@ -642,7 +659,8 @@ void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
 		DrawCompanyIcon(cid, (r.left + r.right + 1 - sprite_size.width) / 2, (r.top + r.bottom + 1 - sprite_size.height) / 2);
 	}
 	if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
-		GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, LinkGraphOverlay::LINK_COLOURS[widget - WID_LGL_SATURATION_FIRST]);
+		uint8 colour = LinkGraphOverlay::LINK_COLOURS[_settings_client.gui.linkgraph_colours][widget - WID_LGL_SATURATION_FIRST];
+		GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, colour);
 		StringID str = STR_NULL;
 		if (widget == WID_LGL_SATURATION_FIRST) {
 			str = STR_LINKGRAPH_LEGEND_UNUSED;
@@ -651,7 +669,9 @@ void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
 		} else if (widget == (WID_LGL_SATURATION_LAST + WID_LGL_SATURATION_FIRST) / 2) {
 			str = STR_LINKGRAPH_LEGEND_SATURATED;
 		}
-		if (str != STR_NULL) DrawString(r.left, r.right, (r.top + r.bottom + 1 - FONT_HEIGHT_SMALL) / 2, str, TC_FROMSTRING, SA_HOR_CENTER);
+		if (str != STR_NULL) {
+			DrawString(r.left, r.right, (r.top + r.bottom + 1 - FONT_HEIGHT_SMALL) / 2, str, GetContrastColour(colour) | TC_FORCED, SA_HOR_CENTER);
+		}
 	}
 	if (IsInsideMM(widget, WID_LGL_CARGO_FIRST, WID_LGL_CARGO_LAST + 1)) {
 		if (this->IsWidgetDisabled(widget)) return;

src/linkgraph/linkgraph_gui.h

@@ -53,7 +53,7 @@ public:
 	typedef std::vector<StationSupplyInfo> StationSupplyList;
 	typedef std::vector<LinkInfo> LinkList;
 
-	static const uint8 LINK_COLOURS[];
+	static const uint8 LINK_COLOURS[][12];
 
 	/**
 	 * Create a link graph overlay for the specified window.

src/settings.cpp

@@ -1296,6 +1296,12 @@ static bool ViewportMapShowTunnelModeChanged(int32 p1)
 	return RedrawScreen(p1);
 }
 
+static bool UpdateLinkgraphColours(int32 p1)
+{
+	BuildLinkStatsLegend();
+	return RedrawScreen(p1);
+}
+
 /** Checks if any settings are set to incorrect values, and sets them to correct values in that case. */
 static void ValidateSettings()
 {

src/settings_gui.cpp

@@ -1579,6 +1579,7 @@ static SettingsContainer &GetSettingsTree()
 			graphics->Add(new SettingEntry("gui.zoom_min"));
 			graphics->Add(new SettingEntry("gui.zoom_max"));
 			graphics->Add(new SettingEntry("gui.smallmap_land_colour"));
+			graphics->Add(new SettingEntry("gui.linkgraph_colours"));
 			graphics->Add(new SettingEntry("gui.graph_line_thickness"));
 			graphics->Add(new SettingEntry("gui.show_vehicle_route_steps"));
 			graphics->Add(new SettingEntry("gui.show_vehicle_route"));

src/settings_type.h

@@ -201,6 +201,7 @@ struct GUISettings : public TimeSettings {
 	bool   adv_sig_bridge_tun_modes;         ///< Enable advanced modes for signals on bridges/tunnels.
 	bool   show_depot_sell_gui;              ///< Show go to depot and sell in UI
 	bool   open_vehicle_gui_clone_share;     ///< Open vehicle GUI when share-cloning vehicle from depot GUI
+	uint8  linkgraph_colours;                ///< linkgraph overlay colours
 
 	uint16 console_backlog_timeout;          ///< the minimum amount of time items should be in the console backlog before they will be removed in ~3 seconds granularity.
 	uint16 console_backlog_length;           ///< the minimum amount of items in the console backlog before items will be removed.

src/smallmap_gui.cpp

@@ -214,7 +214,7 @@ void BuildLinkStatsLegend()
 
 	for (; i < _smallmap_cargo_count + lengthof(_linkstat_colours_in_legenda); ++i) {
 		_legend_linkstats[i].legend = STR_EMPTY;
-		_legend_linkstats[i].colour = LinkGraphOverlay::LINK_COLOURS[_linkstat_colours_in_legenda[i - _smallmap_cargo_count]];
+		_legend_linkstats[i].colour = LinkGraphOverlay::LINK_COLOURS[_settings_client.gui.linkgraph_colours][_linkstat_colours_in_legenda[i - _smallmap_cargo_count]];
 		_legend_linkstats[i].show_on_map = true;
 	}
 

src/table/settings.ini

@@ -52,6 +52,7 @@ static bool SimulatedWormholeSignalsChanged(int32 p1);
 static bool EnableSingleVehSharedOrderGuiChanged(int32 p1);
 static bool CheckYapfRailSignalPenalties(int32 p1);
 static bool ViewportMapShowTunnelModeChanged(int32 p1);
+static bool UpdateLinkgraphColours(int32 p1);
 
 static bool UpdateClientName(int32 p1);
 static bool UpdateServerPassword(int32 p1);
@@ -4952,6 +4953,20 @@ strhelp  = STR_CONFIG_SETTING_SHOW_NEWGRF_NAME_HELPTEXT
 proc     = RedrawScreen
 cat      = SC_ADVANCED
 
+[SDTC_VAR]
+var      = gui.linkgraph_colours
+type     = SLE_UINT8
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+guiflags = SGF_MULTISTRING
+def      = 0
+min      = 0
+max      = 3
+str      = STR_CONFIG_SETTING_LINKGRAPH_COLOURS
+strhelp  = STR_CONFIG_SETTING_LINKGRAPH_COLOURS_HELPTEXT
+strval   = STR_CONFIG_SETTING_LINKGRAPH_COLOURS_GREEN_TO_RED
+proc     = UpdateLinkgraphColours
+cat      = SC_BASIC
+
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
 ifdef    = DEDICATED