Add client setting to show train weight ratios in details header.

Off by default.

src/lang/english.txt

@@ -1287,6 +1287,10 @@ STR_CONFIG_SETTING_POPULATION_IN_LABEL                          :Show town popul
 STR_CONFIG_SETTING_POPULATION_IN_LABEL_HELPTEXT                 :Display the population of towns in their label on the map
 STR_CONFIG_SETTING_GRAPH_LINE_THICKNESS                         :Thickness of lines in graphs: {STRING2}
 STR_CONFIG_SETTING_GRAPH_LINE_THICKNESS_HELPTEXT                :Width of the line in the graphs. A thin line is more precisely readable, a thicker line is easier to see and colours are easier to distinguish
+STR_CONFIG_SETTING_SHOW_TRAIN_LENGTH_IN_DETAILS                 :Show train length in details: {STRING2}
+STR_CONFIG_SETTING_SHOW_TRAIN_LENGTH_IN_DETAILS_HELPTEXT        :Show train length in the vehicle details window
+STR_CONFIG_SETTING_SHOW_TRAIN_WEIGHT_RATIOS_IN_DETAILS          :Show train weight ratios in details: {STRING2}
+STR_CONFIG_SETTING_SHOW_TRAIN_WEIGHT_RATIOS_IN_DETAILS_HELPTEXT :Show train weight ratios in the vehicle details window
 STR_CONFIG_SETTING_SHOW_RESTRICTED_SIG_DEF                      :Show restricted electric signals using default graphics: {STRING2}
 STR_CONFIG_SETTING_SHOW_RESTRICTED_SIG_DEF_HELPTEXT             :Show electric signals with routing restriction programs using the default signal graphics with a blue signal post, instead of using any NewGRF signal graphics. This is to make it easier to visually distinguish restricted signals.
 
@@ -3776,6 +3780,8 @@ STR_VEHICLE_INFO_MAX_SPEED_RANGE                                :{BLACK}Max. spe
 STR_VEHICLE_INFO_WEIGHT_POWER_MAX_SPEED                         :{BLACK}Weight: {LTBLUE}{WEIGHT_SHORT} {BLACK}Power: {LTBLUE}{POWER}{BLACK} Max. speed: {LTBLUE}{VELOCITY}
 STR_VEHICLE_INFO_WEIGHT_POWER_MAX_SPEED_MAX_TE                  :{BLACK}Weight: {LTBLUE}{WEIGHT_SHORT} {BLACK}Power: {LTBLUE}{POWER}{BLACK} Max. speed: {LTBLUE}{VELOCITY} {BLACK}Max. T.E.: {LTBLUE}{FORCE}
 
+STR_VEHICLE_INFO_WEIGHT_RATIOS                                  :{BLACK}Power / weight: {LTBLUE}{POWER_WEIGHT_RATIO} {BLACK} Max. T.E / weight: {LTBLUE}{FORCE_WEIGHT_RATIO}
+
 STR_VEHICLE_INFO_PROFIT_THIS_YEAR_LAST_YEAR                     :{BLACK}Profit this year: {LTBLUE}{CURRENCY_LONG} (last year: {CURRENCY_LONG})
 STR_VEHICLE_INFO_RELIABILITY_BREAKDOWNS                         :{BLACK}Reliability: {LTBLUE}{COMMA}%  {BLACK}Breakdowns since last service: {LTBLUE}{COMMA}
 

src/settings_gui.cpp

@@ -1545,6 +1545,7 @@ static SettingsContainer &GetSettingsTree()
 			interface->Add(new SettingEntry("gui.timetable_in_ticks"));
 			interface->Add(new SettingEntry("gui.timetable_arrival_departure"));
 			interface->Add(new SettingEntry("gui.expenses_layout"));
+			interface->Add(new SettingEntry("gui.show_train_weight_ratios_in_details"));
 		}
 
 		SettingsPage *advisors = main->Add(new SettingsPage(STR_CONFIG_SETTING_ADVISORS));

src/settings_type.h

@@ -135,6 +135,7 @@ struct GUISettings {
 	uint32 last_newgrf_count;                ///< the numbers of NewGRFs we found during the last scan
 	byte   missing_strings_threshold;        ///< the number of missing strings before showing the warning
 	uint8  graph_line_thickness;             ///< the thickness of the lines in the various graph guis
+	bool   show_train_weight_ratios_in_details;   ///< show train weight ratios in vehicle details window top widget
 	bool   show_restricted_signal_default;   ///< Show restricted electric signals using the default sprite
 	uint8  osk_activation;                   ///< Mouse gesture to trigger the OSK.
 

src/table/settings.ini

@@ -3133,6 +3133,15 @@ strhelp  = STR_CONFIG_SETTING_GRAPH_LINE_THICKNESS_HELPTEXT
 strval   = STR_JUST_COMMA
 proc     = RedrawScreen
 
+[SDTC_BOOL]
+var      = gui.show_train_weight_ratios_in_details
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_SHOW_TRAIN_WEIGHT_RATIOS_IN_DETAILS
+strhelp  = STR_CONFIG_SETTING_SHOW_TRAIN_WEIGHT_RATIOS_IN_DETAILS_HELPTEXT
+proc     = RedrawScreen
+cat      = SC_EXPERT
+
 [SDTC_BOOL]
 var      = gui.show_restricted_signal_default
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC

src/vehicle_gui.cpp

@@ -1859,6 +1859,7 @@ static StringID _service_interval_dropdown[] = {
 struct VehicleDetailsWindow : Window {
 	TrainDetailsWindowTabs tab; ///< For train vehicles: which tab is displayed.
 	Scrollbar *vscroll;
+	bool vehicle_weight_ratio_line_shown;
 
 	/** Initialize a newly created vehicle details window */
 	VehicleDetailsWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
@@ -1920,12 +1921,21 @@ struct VehicleDetailsWindow : Window {
 		return desired_height;
 	}
 
+	bool ShouldShowWeightRatioLine(const Vehicle *v) const
+	{
+		return (v->type == VEH_TRAIN && _settings_client.gui.show_train_weight_ratios_in_details);
+	}
+
 	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
 	{
 		switch (widget) {
 			case WID_VD_TOP_DETAILS: {
+				const Vehicle *v = Vehicle::Get(this->window_number);
 				Dimension dim = { 0, 0 };
-				size->height = WD_FRAMERECT_TOP + 4 * FONT_HEIGHT_NORMAL + WD_FRAMERECT_BOTTOM;
+				this->vehicle_weight_ratio_line_shown = ShouldShowWeightRatioLine(v);
+				int lines = 4;
+				if (this->vehicle_weight_ratio_line_shown) lines++;
+				size->height = WD_FRAMERECT_TOP + lines * FONT_HEIGHT_NORMAL + WD_FRAMERECT_BOTTOM;
 
 				for (uint i = 0; i < 4; i++) SetDParamMaxValue(i, INT16_MAX);
 				static const StringID info_strings[] = {
@@ -1938,6 +1948,11 @@ struct VehicleDetailsWindow : Window {
 				for (uint i = 0; i < lengthof(info_strings); i++) {
 					dim = maxdim(dim, GetStringBoundingBox(info_strings[i]));
 				}
+				if (this->vehicle_weight_ratio_line_shown) {
+					SetDParamMaxValue(0, 1 << 16);
+					SetDParamMaxValue(1, 1 << 16);
+					dim = maxdim(dim, GetStringBoundingBox(STR_VEHICLE_INFO_WEIGHT_RATIOS));
+				}
 				SetDParam(0, STR_VEHICLE_INFO_AGE);
 				dim = maxdim(dim, GetStringBoundingBox(STR_VEHICLE_INFO_AGE_RUNNING_COST_YR));
 				size->width = dim.width + WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT;
@@ -2072,6 +2087,14 @@ struct VehicleDetailsWindow : Window {
 				DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, string);
 				y += FONT_HEIGHT_NORMAL;
 
+				bool should_show_weight_ratio = this->ShouldShowWeightRatioLine(v);
+				if (should_show_weight_ratio) {
+					SetDParam(0, (100 * Train::From(v)->gcache.cached_power) / max<uint>(1, Train::From(v)->gcache.cached_weight));
+					SetDParam(1, (Train::From(v)->gcache.cached_max_te / 10) / max<uint>(1, Train::From(v)->gcache.cached_weight));
+					DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_VEHICLE_INFO_WEIGHT_RATIOS);
+					y += FONT_HEIGHT_NORMAL;
+				}
+
 				/* Draw profit */
 				SetDParam(0, v->GetDisplayProfitThisYear());
 				SetDParam(1, v->GetDisplayProfitLastYear());
@@ -2082,6 +2105,10 @@ struct VehicleDetailsWindow : Window {
 				SetDParam(0, ToPercent16(v->reliability));
 				SetDParam(1, v->breakdowns_since_last_service);
 				DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_VEHICLE_INFO_RELIABILITY_BREAKDOWNS);
+
+				if (this->vehicle_weight_ratio_line_shown != should_show_weight_ratio) {
+					const_cast<VehicleDetailsWindow *>(this)->ReInit();
+				}
 				break;
 			}