(svn r2764) -Feature: Clone vehicles

-This allows a player to clone an excisting vehicle of his own
  -[fix]: this uncovered an excisting bug in CmdBuildRailVehicle() where depots could build trains of the wrong track type. This is fixed
  -Thanks to Celestar for drawing the sprites and _luca_ for including them in openttd.grf

aircraft_cmd.c

@@ -332,7 +332,7 @@ bool IsAircraftHangarTile(TileIndex tile)
 				(_m[tile].m5 == 32 || _m[tile].m5 == 65 || _m[tile].m5 == 86);
 }
 
-static bool CheckStoppedInHangar(Vehicle *v)
+bool CheckStoppedInHangar(Vehicle *v)
 {
 	if (!(v->vehstatus & VS_STOPPED) || !IsAircraftHangarTile(v->tile)) {
 		_error_message = STR_A01B_AIRCRAFT_MUST_BE_STOPPED;

aircraft_gui.c

@@ -89,6 +89,15 @@ void CcBuildAircraft(bool success, TileIndex tile, uint32 p1, uint32 p2)
 	}
 }
 
+void CcCloneAircraft(bool success, uint tile, uint32 p1, uint32 p2)
+{
+	Vehicle *v;
+
+	if (success) {
+		v = GetVehicle(_new_aircraft_id);
+		ShowAircraftViewWindow(v);
+	}
+}
 
 static void NewAircraftWndProc(Window *w, WindowEvent *e)
 {
@@ -496,11 +505,14 @@ static const Widget _aircraft_view_widgets[] = {
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  50,  67, 0x2B4,    STR_A03B_REFIT_AIRCRAFT_TO_CARRY },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  68,  85, 0x2B2,    STR_A028_SHOW_AIRCRAFT_S_ORDERS },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  86, 103, 0x2B3,    STR_A02B_SHOW_AIRCRAFT_DETAILS },
+{ WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  32,  49, SPR_CLONE_AIRCRAFT,      STR_CLONE_AIRCRAFT_INFO },
 { WWT_PANEL,      RESIZE_LRB,   14, 232, 249, 104, 103, 0x0,      STR_NULL },
 { WWT_RESIZEBOX,  RESIZE_LRTB,  14, 238, 249, 104, 115, 0x0,      STR_NULL },
 { WIDGETS_END }
 };
 
+bool CheckStoppedInHangar(Vehicle *v);
+
 static void AircraftViewWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -587,6 +599,12 @@ static void AircraftViewWndProc(Window *w, WindowEvent *e)
 		case 10: /* show details */
 			ShowAircraftDetailsWindow(v);
 			break;
+		case 11: {
+			/* clone vehicle */
+			Vehicle *v;
+			v = GetVehicle(w->window_number);
+			DoCommandP(v->tile, v->index, _ctrl_pressed ? 1 : 0, CcCloneAircraft, CMD_CLONE_VEHICLE | CMD_MSG(STR_A008_CAN_T_BUILD_AIRCRAFT));
+		} break;
 		}
 	} break;
 
@@ -602,6 +620,19 @@ static void AircraftViewWndProc(Window *w, WindowEvent *e)
 		DeleteWindowById(WC_VEHICLE_REFIT, w->window_number);
 		DeleteWindowById(WC_VEHICLE_DETAILS, w->window_number);
 		break;
+		
+		       case WE_MOUSELOOP:
+               {
+                       Vehicle *v;
+                       uint32 h;
+                       v = GetVehicle(w->window_number);
+                       h = CheckStoppedInHangar(v) ? (1<< 7) : (1 << 11);
+                       if (h != w->hidden_state) {
+                               w->hidden_state = h;
+                               SetWindowDirty(w);
+                       }
+               } break;
+
 	}
 }
 
@@ -636,7 +667,7 @@ static void DrawAircraftDepotWindow(Window *w)
 
 	/* setup disabled buttons */
 	w->disabled_state =
-		IsTileOwner(tile, _local_player) ? 0 : ((1 << 4) | (1 << 7));
+		IsTileOwner(tile, _local_player) ? 0 : ((1<<4) | (1<<7) | (1<<8));
 
 	/* determine amount of items for scroller */
 	num = 0;
@@ -741,6 +772,42 @@ static void AircraftDepotClickAircraft(Window *w, int x, int y)
 	}
 }
 
+/**
+ * Clones an aircraft
+ * @param *v is the original vehicle to clone
+ * @param *w is the window of the hangar where the clone is build
+ */
+static bool HandleCloneVehClick(Vehicle *v, Window *w)
+{
+
+	if (!v){
+		return false;
+	}
+
+	if (v->type != VEH_Aircraft) {
+		// it's not an aircraft, do nothing
+		return false;
+	}
+
+
+    DoCommandP(w->window_number, v->index, _ctrl_pressed ? 1 : 0,CcCloneAircraft,CMD_CLONE_VEHICLE | CMD_MSG(STR_882B_CAN_T_BUILD_RAILROAD_VEHICLE));
+
+	ResetObjectToPlace();
+
+	return true;
+}
+
+static void ClonePlaceObj(uint tile, Window *w)
+{
+	Vehicle *v;
+
+
+	v = CheckMouseOverVehicle();
+	if (v && HandleCloneVehClick(v, w))
+		return;
+}
+
+
 static void AircraftDepotWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -754,14 +821,48 @@ static void AircraftDepotWndProc(Window *w, WindowEvent *e)
 			AircraftDepotClickAircraft(w, e->click.pt.x, e->click.pt.y);
 			break;
 		case 7: /* show build aircraft window */
+			ResetObjectToPlace();
 			ShowBuildAircraftWindow(w->window_number);
 			break;
-		case 8: /* scroll to tile */
+			
+				case 8: /* clone button */
+			InvalidateWidget(w, 8);
+				TOGGLEBIT(w->click_state, 8);
+				
+				if (HASBIT(w->click_state, 8)) {
+					_place_clicked_vehicle = NULL;
+					SetObjectToPlaceWnd(SPR_CURSOR_CLONE, VHM_RECT, w);
+				} else {
+					ResetObjectToPlace();
+				}
+					break;
+		case 9: /* scroll to tile */
+			ResetObjectToPlace();
 			ScrollMainWindowToTile(w->window_number);
 			break;
 		}
 		break;
 
+
+case WE_PLACE_OBJ: {
+		ClonePlaceObj(e->place.tile, w);
+	} break;
+
+	case WE_ABORT_PLACE_OBJ: {
+		CLRBIT(w->click_state, 8);
+		InvalidateWidget(w, 8);
+	} break;
+	
+	// check if a vehicle in a depot was clicked..
+	case WE_MOUSELOOP: {
+		Vehicle *v = _place_clicked_vehicle;
+		// since OTTD checks all open depot windows, we will make sure that it triggers the one with a clicked clone button
+		if (v != NULL && HASBIT(w->click_state, 8)) {
+			_place_clicked_vehicle = NULL;
+			HandleCloneVehClick( v, w);
+		}
+	} break;
+	
 	case WE_DESTROY:
 		DeleteWindowById(WC_BUILD_VEHICLE, w->window_number);
 		break;
@@ -824,8 +925,9 @@ static const Widget _aircraft_depot_widgets[] = {
 
 {     WWT_MATRIX,     RESIZE_RB,    14,     0,   295,    14,    61, 0x204,										STR_A021_AIRCRAFT_CLICK_ON_AIRCRAFT},
 {  WWT_SCROLLBAR,    RESIZE_LRB,    14,   319,   330,    14,    61, 0x0,											STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   159,    62,    73, STR_A003_NEW_AIRCRAFT,		STR_A022_BUILD_NEW_AIRCRAFT},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   160,   318,    62,    73, STR_00E4_LOCATION,				STR_A024_CENTER_MAIN_VIEW_ON_HANGAR},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   105,    62,    73, STR_A003_NEW_AIRCRAFT,		STR_A022_BUILD_NEW_AIRCRAFT},
+{WWT_NODISTXTBTN,     RESIZE_TB,    14,   106,   212,    62,    73, STR_CLONE_AIRCRAFT,		STR_CLONE_AIRCRAFT_INFO_HANGAR_WINDOW},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   213,   318,    62,    73, STR_00E4_LOCATION,				STR_A024_CENTER_MAIN_VIEW_ON_HANGAR},
 {      WWT_PANEL,    RESIZE_RTB,    14,   319,   318,    62,    73, 0x0,													STR_NULL},
 {  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   319,   330,    62,    73, 0x0,											STR_RESIZE_BUTTON},
 {   WIDGETS_END},

callback_table.c

@@ -10,6 +10,7 @@
 
 /* aircraft_gui.c */
 CommandCallback CcBuildAircraft;
+CommandCallback CcCloneAircraft;
 
 /* airport_gui.c */
 CommandCallback CcBuildAirport;
@@ -41,13 +42,16 @@ CommandCallback CcRoadDepot;
 
 /* roadveh_gui.c */
 CommandCallback CcBuildRoadVeh;
+CommandCallback CcCloneRoadVeh;
 
 /* ship_gui.c */
 CommandCallback CcBuildShip;
+CommandCallback CcCloneShip;
 
 /* train_gui.c */
 CommandCallback CcBuildWagon;
 CommandCallback CcBuildLoco;
+CommandCallback CcCloneTrain;
 
 CommandCallback *_callback_table[] = {
 	/* 0x00 */ NULL,
@@ -70,7 +74,11 @@ CommandCallback *_callback_table[] = {
 	/* 0x11 */ CcPlaySound1D,
 	/* 0x12 */ CcPlaySound1E,
 	/* 0x13 */ CcStation,
-	/* 0x14 */ CcTerraform
+	/* 0x14 */ CcTerraform,
+	/* 0x15 */ CcCloneAircraft,
+	/* 0x16 */ CcCloneRoadVeh,
+	/* 0x17 */ CcCloneShip,
+	/* 0x18 */ CcCloneTrain,
 };
 
 const int _callback_table_count = lengthof(_callback_table);

command.c

@@ -159,6 +159,9 @@ DEF_COMMAND(CmdRemoveSignalTrack);
 
 DEF_COMMAND(CmdReplaceVehicle);
 
+DEF_COMMAND(CmdCloneVehicle);
+
+
 /* The master command table */
 static const Command _command_proc_table[] = {
 	{CmdBuildRailroadTrack,                  0}, /*   0 */
@@ -300,6 +303,7 @@ static const Command _command_proc_table[] = {
 	{CmdGiveMoney,                           0}, /* 113 */
 	{CmdChangePatchSetting,         CMD_SERVER}, /* 114 */
 	{CmdReplaceVehicle,                      0}, /* 115 */
+	{CmdCloneVehicle,						 0}, /* 116 */
 };
 
 /* This function range-checks a cmd, and checks if the cmd is not NULL */

command.h

@@ -136,6 +136,9 @@ enum {
 	CMD_CHANGE_PATCH_SETTING = 114,
 
 	CMD_REPLACE_VEHICLE = 115,
+
+	CMD_CLONE_VEHICLE = 116,
+
 };
 
 enum {

lang/english.txt

@@ -2404,6 +2404,12 @@ STR_881C_NEW_RAIL_VEHICLES                                      :{WHITE}New Rail
 STR_881D_NEW_MONORAIL_VEHICLES                                  :{WHITE}New Monorail Vehicles
 STR_881E_NEW_MAGLEV_VEHICLES                                    :{WHITE}New Maglev Vehicles
 STR_881F_BUILD_VEHICLE                                          :{BLACK}Build Vehicle
+STR_CLONE_ROAD_VEHICLE                                          :{BLACK}Clone Vehicle
+STR_CLONE_ROAD_VEHICLE_INFO 	                                :{BLACK}This will build a copy of the road vehicle. Control-click will share the orders
+STR_CLONE_ROAD_VEHICLE_DEPOT_INFO	                        :{BLACK}This will build a copy of a road vehicle. Click this button and then on a road vehicle inside or outside the depot. Control-click will share the orders
+STR_CLONE_TRAIN                                     		:{BLACK}Clone Train
+STR_CLONE_TRAIN_INFO 	                  			:{BLACK}This will build a copy of the train including all cars. Control-click will share the orders
+STR_CLONE_TRAIN_DEPOT_INFO	                        	:{BLACK}This will build a copy of a train including all cars. Click this button and then on a train inside or outside the depot. Control-click will share the orders
 STR_8820_RENAME                                                 :{BLACK}Rename
 STR_8823_SKIP                                                   :{BLACK}Skip
 STR_8824_DELETE                                                 :{BLACK}Delete
@@ -2560,6 +2566,9 @@ STR_9806_CAN_T_BUILD_SHIPS                                      :{WHITE}Can't bu
 STR_9807_MUST_BUILD_SHIP_DEPOT_FIRST                            :{WHITE}Must build ship depot first
 STR_9808_NEW_SHIPS                                              :{WHITE}New Ships
 STR_9809_BUILD_SHIP                                             :{BLACK}Build Ship
+STR_CLONE_SHIP                                              	:{BLACK}Clone Ship
+STR_CLONE_SHIP_INFO 	                                        :{BLACK}This will build a copy of the ship. Control-click will share the orders
+STR_CLONE_SHIP_DEPOT_INFO	                          	:{BLACK}This will build a copy of a ship. Click this button and then on a ship inside or outside the depot. Control-click will share the orders
 STR_980B_SHIP_MUST_BE_STOPPED_IN                                :{WHITE}Ship must be stopped in depot
 STR_980C_CAN_T_SELL_SHIP                                        :{WHITE}Can't sell ship...
 STR_980D_CAN_T_BUILD_SHIP                                       :{WHITE}Can't build ship...
@@ -2624,6 +2633,9 @@ STR_A000_AIRPORTS                                               :{WHITE}Airports
 STR_A001_CAN_T_BUILD_AIRPORT_HERE                               :{WHITE}Can't build airport here...
 STR_A002_AIRCRAFT_HANGAR                                        :{WHITE}{STATION} Aircraft Hangar
 STR_A003_NEW_AIRCRAFT                                           :{BLACK}New Aircraft
+STR_CLONE_AIRCRAFT                                           	:{BLACK}Clone Aircraft
+STR_CLONE_AIRCRAFT_INFO                                        	:{BLACK}This will build a copy of the aircraft. Control-click will share the orders
+STR_CLONE_AIRCRAFT_INFO_HANGAR_WINDOW                          	:{BLACK}This will build a copy of an aircraft. Click this button and then on an aircraft inside or outside the hangar. Control-click will share the orders
 STR_A004_INFORMATION                                            :{BLACK}Information
 STR_A005_NEW_AIRCRAFT                                           :{WHITE}New Aircraft
 STR_A006_BUILD_AIRCRAFT                                         :{BLACK}Build Aircraft

roadveh_gui.c

@@ -230,6 +230,16 @@ static void ShowRoadVehDetailsWindow(Vehicle *v)
 	w->caption_color = v->owner;
 }
 
+void CcCloneRoadVeh(bool success, uint tile, uint32 p1, uint32 p2)
+{
+	Vehicle *v;
+
+	if (!success) return;
+
+	v = GetVehicle(_new_roadveh_id);
+	ShowRoadVehViewWindow(v);
+}
+
 static void RoadVehViewWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -308,6 +318,12 @@ static void RoadVehViewWndProc(Window *w, WindowEvent *e)
 		case 10: /* show details */
 			ShowRoadVehDetailsWindow(v);
 			break;
+		case 11: {
+			/* clone vehicle */
+			Vehicle *v;
+			v = GetVehicle(w->window_number);
+			DoCommandP(v->tile, v->index, _ctrl_pressed ? 1 : 0, CcCloneRoadVeh, CMD_CLONE_VEHICLE | CMD_MSG(STR_9009_CAN_T_BUILD_ROAD_VEHICLE));
+			} break;
 		}
 	} break;
 
@@ -322,6 +338,18 @@ static void RoadVehViewWndProc(Window *w, WindowEvent *e)
 		DeleteWindowById(WC_VEHICLE_ORDERS, w->window_number);
 		DeleteWindowById(WC_VEHICLE_DETAILS, w->window_number);
 		break;
+
+	case WE_MOUSELOOP:
+		{
+			Vehicle *v;
+			uint32 h;
+			v = GetVehicle(w->window_number);
+			h = IsTileDepotType(v->tile, TRANSPORT_ROAD) && (v->vehstatus&VS_STOPPED) ? (1<< 7) : (1 << 11);
+			if (h != w->hidden_state) {
+				w->hidden_state = h;
+				SetWindowDirty(w);
+			}
+		}
 	}
 }
 
@@ -337,6 +365,7 @@ static const Widget _roadveh_view_widgets[] = {
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  50,  67, 0x2CB,    STR_9020_FORCE_VEHICLE_TO_TURN_AROUND },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  68,  85, 0x2B2,    STR_901D_SHOW_VEHICLE_S_ORDERS },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  86, 103, 0x2B3,    STR_9021_SHOW_ROAD_VEHICLE_DETAILS },
+{ WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  32,  49, SPR_CLONE_ROADVEH,      STR_CLONE_ROAD_VEHICLE_INFO },
 { WWT_PANEL,      RESIZE_LRB,   14, 232, 249, 104, 103, 0x0,      STR_NULL },
 { WWT_RESIZEBOX,  RESIZE_LRTB,  14, 238, 249, 104, 115, 0x0,      STR_NULL },
 { WIDGETS_END }
@@ -536,7 +565,7 @@ static void DrawRoadDepotWindow(Window *w)
 
 	/* setup disabled buttons */
 	w->disabled_state =
-		IsTileOwner(tile, _local_player) ? 0 : ((1 << 4) | (1 << 7));
+		IsTileOwner(tile, _local_player) ? 0 : ((1<<4) | (1<<7) | (1<<8));
 
 	/* determine amount of items for scroller */
 	num = 0;
@@ -640,6 +669,41 @@ static void RoadDepotClickVeh(Window *w, int x, int y)
 	}
 }
 
+/**
+ * Clones a road vehicle
+ * @param *v is the original vehicle to clone
+ * @param *w is the window of the depot where the clone is build
+ */
+static bool HandleCloneVehClick(Vehicle *v, Window *w)
+{
+
+	if (!v){
+		return false;
+	}
+
+	if (v->type != VEH_Road) {
+		// it's not a road vehicle, do nothing
+		return false;
+	}
+
+
+    DoCommandP(w->window_number, v->index, _ctrl_pressed ? 1 : 0,CcCloneRoadVeh,CMD_CLONE_VEHICLE | CMD_MSG(STR_882B_CAN_T_BUILD_RAILROAD_VEHICLE));
+
+	ResetObjectToPlace();
+
+	return true;
+}
+
+static void ClonePlaceObj(uint tile, Window *w)
+{
+	Vehicle *v;
+
+
+	v = CheckMouseOverVehicle();
+	if (v && HandleCloneVehClick(v, w))
+		return;
+}
+
 static void RoadDepotWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -654,12 +718,45 @@ static void RoadDepotWndProc(Window *w, WindowEvent *e)
 			break;
 
 		case 7:
+			ResetObjectToPlace();
 			ShowBuildRoadVehWindow(w->window_number);
 			break;
+			
+		case 8: /* clone button */
+			InvalidateWidget(w, 8);
+				TOGGLEBIT(w->click_state, 8);
+				
+				if (HASBIT(w->click_state, 8)) {
+					_place_clicked_vehicle = NULL;
+					SetObjectToPlaceWnd(SPR_CURSOR_CLONE, VHM_RECT, w);
+				} else {
+					ResetObjectToPlace();
+				}
+					break;
+				
+			case 9: /* scroll to tile */
+				ResetObjectToPlace();
+				ScrollMainWindowToTile(w->window_number);
+					break;
+		}
+	} break;
+	
+		case WE_PLACE_OBJ: {
+		ClonePlaceObj(e->place.tile, w);
+	} break;
 
-		case 8: /* scroll to tile */
-			ScrollMainWindowToTile(w->window_number);
-			break;
+	case WE_ABORT_PLACE_OBJ: {
+		CLRBIT(w->click_state, 8);
+		InvalidateWidget(w, 8);
+	} break;
+	
+	// check if a vehicle in a depot was clicked..
+	case WE_MOUSELOOP: {
+		Vehicle *v = _place_clicked_vehicle;
+	// since OTTD checks all open depot windows, we will make sure that it triggers the one with a clicked clone button
+		if (v != NULL && HASBIT(w->click_state, 8)) {
+			_place_clicked_vehicle = NULL;
+			HandleCloneVehClick( v, w);
 		}
 	} break;
 
@@ -729,8 +826,9 @@ static const Widget _road_depot_widgets[] = {
 
 {     WWT_MATRIX,     RESIZE_RB,    14,     0,   279,    14,    55, 0x305,												STR_9022_VEHICLES_CLICK_ON_VEHICLE},
 {  WWT_SCROLLBAR,    RESIZE_LRB,    14,   303,   314,    14,    55, 0x0,													STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   150,    56,    67, STR_9004_NEW_VEHICLES,				STR_9023_BUILD_NEW_ROAD_VEHICLE},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   151,   302,    56,    67, STR_00E4_LOCATION,						STR_9025_CENTER_MAIN_VIEW_ON_ROAD},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   100,    56,    67, STR_9004_NEW_VEHICLES,				STR_9023_BUILD_NEW_ROAD_VEHICLE},
+{WWT_NODISTXTBTN,     RESIZE_TB,    14,   101,   200,    56,    67, STR_CLONE_ROAD_VEHICLE,		STR_CLONE_ROAD_VEHICLE_DEPOT_INFO},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   201,   302,    56,    67, STR_00E4_LOCATION,						STR_9025_CENTER_MAIN_VIEW_ON_ROAD},
 {      WWT_PANEL,    RESIZE_RTB,    14,   303,   302,    56,    67, 0x0,													STR_NULL},
 {  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   303,   314,    56,    67, 0x0,													STR_RESIZE_BUTTON},
 {   WIDGETS_END},

ship_gui.c

@@ -320,6 +320,15 @@ void CcBuildShip(bool success, TileIndex tile, uint32 p1, uint32 p2)
 	ShowShipViewWindow(v);
 }
 
+void CcCloneShip(bool success, uint tile, uint32 p1, uint32 p2)
+{
+	Vehicle *v;
+	if (!success) return;
+
+	v = GetVehicle(_new_ship_id);
+	ShowShipViewWindow(v);
+}
+
 static void NewShipWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -465,60 +474,60 @@ static void ShowBuildShipWindow(TileIndex tile)
 
 static void ShipViewWndProc(Window *w, WindowEvent *e) {
 	switch(e->event) {
-	case WE_PAINT: {
-		Vehicle *v = GetVehicle(w->window_number);
-		uint32 disabled = 1<<8;
-		StringID str;
+		case WE_PAINT: {
+			Vehicle *v = GetVehicle(w->window_number);
+			uint32 disabled = 1<<8;
+			StringID str;
 
-		// Possible to refit?
-		if (ShipVehInfo(v->engine_type)->refittable &&
+			// Possible to refit?
+			if (ShipVehInfo(v->engine_type)->refittable &&
 				v->vehstatus&VS_STOPPED &&
 				v->u.ship.state == 0x80 &&
 				IsTileDepotType(v->tile, TRANSPORT_WATER))
-			disabled = 0;
-
-		if (v->owner != _local_player)
-			disabled |= 1<<8 | 1<<7;
-		w->disabled_state = disabled;
+				disabled = 0;
 
-		/* draw widgets & caption */
-		SetDParam(0, v->string_id);
-		SetDParam(1, v->unitnumber);
-		DrawWindowWidgets(w);
+			if (v->owner != _local_player)
+				disabled |= 1<<8 | 1<<7;
+			w->disabled_state = disabled;
 
-		if (v->breakdown_ctr == 1) {
-			str = STR_885C_BROKEN_DOWN;
-		} else if (v->vehstatus & VS_STOPPED) {
-			str = STR_8861_STOPPED;
-		} else {
-			switch (v->current_order.type) {
-			case OT_GOTO_STATION: {
-				SetDParam(0, v->current_order.station);
-				SetDParam(1, v->cur_speed * 10 >> 5);
-				str = STR_HEADING_FOR_STATION + _patches.vehicle_speed;
-			} break;
-
-			case OT_GOTO_DEPOT: {
-				Depot *depot = GetDepot(v->current_order.station);
-				SetDParam(0, depot->town_index);
-				SetDParam(1, v->cur_speed * 10 >> 5);
-				str = STR_HEADING_FOR_SHIP_DEPOT + _patches.vehicle_speed;
-			} break;
-
-			case OT_LOADING:
-			case OT_LEAVESTATION:
-				str = STR_882F_LOADING_UNLOADING;
-				break;
+			/* draw widgets & caption */
+			SetDParam(0, v->string_id);
+			SetDParam(1, v->unitnumber);
+			DrawWindowWidgets(w);
 
-			default:
-				if (v->num_orders == 0) {
-					str = STR_NO_ORDERS + _patches.vehicle_speed;
-					SetDParam(0, v->cur_speed * 10 >> 5);
-				} else
-					str = STR_EMPTY;
-				break;
+			if (v->breakdown_ctr == 1) {
+				str = STR_885C_BROKEN_DOWN;
+			} else if (v->vehstatus & VS_STOPPED) {
+				str = STR_8861_STOPPED;
+			} else {
+				switch (v->current_order.type) {
+					case OT_GOTO_STATION: {
+						SetDParam(0, v->current_order.station);
+						SetDParam(1, v->cur_speed * 10 >> 5);
+						str = STR_HEADING_FOR_STATION + _patches.vehicle_speed;
+					} break;
+
+					case OT_GOTO_DEPOT: {
+						Depot *depot = GetDepot(v->current_order.station);
+						SetDParam(0, depot->town_index);
+						SetDParam(1, v->cur_speed * 10 >> 5);
+						str = STR_HEADING_FOR_SHIP_DEPOT + _patches.vehicle_speed;
+					} break;
+
+					case OT_LOADING:
+					case OT_LEAVESTATION:
+						str = STR_882F_LOADING_UNLOADING;
+						break;
+						
+					default:
+						if (v->num_orders == 0) {
+							str = STR_NO_ORDERS + _patches.vehicle_speed;
+							SetDParam(0, v->cur_speed * 10 >> 5);
+						} else
+							str = STR_EMPTY;
+						break;
+				}
 			}
-		}
 
 		/* draw the flag plus orders */
 		DrawSprite(v->vehstatus & VS_STOPPED ? 0xC12 : 0xC13, 2, w->widget[5].top + 1);
@@ -526,43 +535,61 @@ static void ShipViewWndProc(Window *w, WindowEvent *e) {
 		DrawWindowViewport(w);
 	} break;
 
-	case WE_CLICK: {
-		Vehicle *v = GetVehicle(w->window_number);
+		case WE_CLICK: {
+			Vehicle *v = GetVehicle(w->window_number);
 
-		switch(e->click.widget) {
-		case 5: /* start stop */
-			DoCommandP(v->tile, v->index, 0, NULL, CMD_START_STOP_SHIP | CMD_MSG(STR_9818_CAN_T_STOP_START_SHIP));
-			break;
-		case 6: /* center main view */
-			ScrollMainWindowTo(v->x_pos, v->y_pos);
-			break;
-		case 7: /* goto hangar */
-			DoCommandP(v->tile, v->index, 0, NULL, CMD_SEND_SHIP_TO_DEPOT | CMD_MSG(STR_9819_CAN_T_SEND_SHIP_TO_DEPOT));
-			break;
-		case 8: /* refit */
-			ShowShipRefitWindow(v);
-			break;
-		case 9: /* show orders */
-			ShowOrdersWindow(v);
-			break;
-		case 10: /* show details */
-			ShowShipDetailsWindow(v);
+			switch(e->click.widget) {
+				case 5: /* start stop */
+					DoCommandP(v->tile, v->index, 0, NULL, CMD_START_STOP_SHIP | CMD_MSG(STR_9818_CAN_T_STOP_START_SHIP));
+					break;
+				case 6: /* center main view */
+					ScrollMainWindowTo(v->x_pos, v->y_pos);
+					break;
+				case 7: /* goto hangar */
+					DoCommandP(v->tile, v->index, 0, NULL, CMD_SEND_SHIP_TO_DEPOT | CMD_MSG(STR_9819_CAN_T_SEND_SHIP_TO_DEPOT));
+					break;
+				case 8: /* refit */
+					ShowShipRefitWindow(v);
+					break;
+				case 9: /* show orders */
+					ShowOrdersWindow(v);
+					break;
+				case 10: /* show details */
+					ShowShipDetailsWindow(v);
+					break;
+				case 11: {
+					/* clone vehicle */
+					Vehicle *v;
+					v = GetVehicle(w->window_number);
+					DoCommandP(v->tile, v->index, _ctrl_pressed ? 1 : 0, CcCloneShip, CMD_CLONE_VEHICLE | CMD_MSG(STR_980D_CAN_T_BUILD_SHIP));
+				} break;
+			}
+		} break;
+
+		case WE_RESIZE:
+			w->viewport->width  += e->sizing.diff.x;
+			w->viewport->height += e->sizing.diff.y;
+			w->viewport->virtual_width  += e->sizing.diff.x;
+			w->viewport->virtual_height += e->sizing.diff.y;
 			break;
-		}
-	} break;
 
-	case WE_RESIZE:
-		w->viewport->width  += e->sizing.diff.x;
-		w->viewport->height += e->sizing.diff.y;
-		w->viewport->virtual_width  += e->sizing.diff.x;
-		w->viewport->virtual_height += e->sizing.diff.y;
-		break;
+		case WE_DESTROY:
+			DeleteWindowById(WC_VEHICLE_ORDERS, w->window_number);
+			DeleteWindowById(WC_VEHICLE_REFIT, w->window_number);
+			DeleteWindowById(WC_VEHICLE_DETAILS, w->window_number);
+			break;
 
-	case WE_DESTROY:
-		DeleteWindowById(WC_VEHICLE_ORDERS, w->window_number);
-		DeleteWindowById(WC_VEHICLE_REFIT, w->window_number);
-		DeleteWindowById(WC_VEHICLE_DETAILS, w->window_number);
-		break;
+		case WE_MOUSELOOP:
+		{
+			Vehicle *v;
+			uint32 h;
+			v = GetVehicle(w->window_number);
+			h = IsTileDepotType(v->tile, TRANSPORT_WATER) && v->vehstatus & VS_HIDDEN ? (1<< 7) : (1 << 11);
+			if (h != w->hidden_state) {
+				w->hidden_state = h;
+				SetWindowDirty(w);
+			}
+		}
 	}
 }
 
@@ -578,6 +605,7 @@ static const Widget _ship_view_widgets[] = {
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  50,  67, 0x2B4,    STR_983A_REFIT_CARGO_SHIP_TO_CARRY},
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  68,  85, 0x2B2,    STR_9828_SHOW_SHIP_S_ORDERS},
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  86, 103, 0x2B3,    STR_982B_SHOW_SHIP_DETAILS},
+{ WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  32,  49, SPR_CLONE_SHIP,      STR_CLONE_SHIP_INFO},
 { WWT_PANEL,      RESIZE_LRB,   14, 232, 249, 104, 103, 0x0,      STR_NULL },
 { WWT_RESIZEBOX,  RESIZE_LRTB,  14, 238, 249, 104, 115, 0x0,      STR_NULL },
 { WIDGETS_END }
@@ -720,6 +748,41 @@ static void ShipDepotClick(Window *w, int x, int y)
 	}
 }
 
+/**
+ * Clones a ship
+ * @param *v is the original vehicle to clone
+ * @param *w is the window of the depot where the clone is build
+ */
+static bool HandleCloneVehClick(Vehicle *v, Window *w)
+{
+
+	if (!v){
+		return false;
+	}
+
+	if (v->type != VEH_Ship) {
+		// it's not a ship, do nothing
+		return false;
+	}
+
+
+    DoCommandP(w->window_number, v->index, _ctrl_pressed ? 1 : 0,CcCloneShip,CMD_CLONE_VEHICLE | CMD_MSG(STR_882B_CAN_T_BUILD_RAILROAD_VEHICLE));
+
+	ResetObjectToPlace();
+
+	return true;
+}
+
+static void ClonePlaceObj(uint tile, Window *w)
+{
+	Vehicle *v;
+
+
+	v = CheckMouseOverVehicle();
+	if (v && HandleCloneVehClick(v, w))
+		return;
+}
+
 static void ShipDepotWndProc(Window *w, WindowEvent *e) {
 	switch(e->event) {
 	case WE_PAINT:
@@ -733,14 +796,49 @@ static void ShipDepotWndProc(Window *w, WindowEvent *e) {
 			break;
 
 		case 7:
+			ResetObjectToPlace();
 			ShowBuildShipWindow(w->window_number);
 			break;
+			
+			case 8: /* clone button */
+			InvalidateWidget(w, 8);
+				TOGGLEBIT(w->click_state, 8);
+				
+				if (HASBIT(w->click_state, 8)) {
+					_place_clicked_vehicle = NULL;
+					SetObjectToPlaceWnd(SPR_CURSOR_CLONE, VHM_RECT, w);
+				} else {
+					ResetObjectToPlace();
+				}
+					break;
 
-		case 8: /* scroll to tile */
+		case 9: /* scroll to tile */
+			ResetObjectToPlace();
 			ScrollMainWindowToTile(w->window_number);
 			break;
 		}
 		break;
+		
+	case WE_PLACE_OBJ: {
+		//ClonePlaceObj(e->place.tile, w);
+		ClonePlaceObj(w->window_number, w);
+	} break;
+
+	case WE_ABORT_PLACE_OBJ: {
+		CLRBIT(w->click_state, 8);
+		InvalidateWidget(w, 8);
+	} break;
+	
+	// check if a vehicle in a depot was clicked..
+	case WE_MOUSELOOP: {
+		Vehicle *v = _place_clicked_vehicle;
+
+	// since OTTD checks all open depot windows, we will make sure that it triggers the one with a clicked clone button
+		if (v != NULL && HASBIT(w->click_state, 8)) {
+			_place_clicked_vehicle = NULL;
+			HandleCloneVehClick(v, w);
+		}
+	} break;
 
 	case WE_DESTROY:
 		DeleteWindowById(WC_BUILD_VEHICLE, w->window_number);
@@ -804,8 +902,9 @@ static const Widget _ship_depot_widgets[] = {
 
 {     WWT_MATRIX,     RESIZE_RB,    14,     0,   269,    14,    61, 0x203,									STR_981F_SHIPS_CLICK_ON_SHIP_FOR},
 {  WWT_SCROLLBAR,    RESIZE_LRB,    14,   293,   304,    14,    61, 0x0,										STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   146,    62,    73, STR_9804_NEW_SHIPS,			STR_9820_BUILD_NEW_SHIP},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   147,   292,    62,    73, STR_00E4_LOCATION,			STR_9822_CENTER_MAIN_VIEW_ON_SHIP},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,    96,    62,    73, STR_9804_NEW_SHIPS,			STR_9820_BUILD_NEW_SHIP},
+{WWT_NODISTXTBTN,     RESIZE_TB,    14,    97,   194,    62,    73, STR_CLONE_SHIP,		STR_CLONE_SHIP_DEPOT_INFO},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   195,   292,    62,    73, STR_00E4_LOCATION,			STR_9822_CENTER_MAIN_VIEW_ON_SHIP},
 {      WWT_PANEL,    RESIZE_RTB,    14,   293,   292,    62,    73, 0x0,													STR_NULL},
 {  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   293,   304,    62,    73, 0x0,										STR_RESIZE_BUTTON},
 {   WIDGETS_END},

spritecache.c

@@ -732,7 +732,7 @@ static const char * const _cached_filenames[4] = {
 	"cached_sprites.xx3",
 };
 
-#define OPENTTD_SPRITES_COUNT 98
+#define OPENTTD_SPRITES_COUNT 100
 static const SpriteID _openttd_grf_indexes[] = {
 	SPR_OPENTTD_BASE + 0, SPR_OPENTTD_BASE + 7, // icons etc
 	134, 134,  // euro symbol medium size

table/sprites.h

@@ -64,6 +64,11 @@ enum Sprites {
 	SPR_ARROW_LEFT    = SPR_OPENTTD_BASE + 97,
 	SPR_ARROW_RIGHT   = SPR_OPENTTD_BASE + 98,
 
+	/* Clone vehicles stuff */
+	SPR_CLONE_AIRCRAFT = SPR_OPENTTD_BASE + 99,
+	SPR_CLONE_ROADVEH = SPR_OPENTTD_BASE + 99,
+	SPR_CLONE_TRAIN = SPR_OPENTTD_BASE + 99,
+	SPR_CLONE_SHIP = SPR_OPENTTD_BASE + 99,
 
 	/* Network GUI sprites */
 	SPR_SQUARE = SPR_OPENTTD_BASE + 23,     // colored square (used for newgrf compatibility)
@@ -942,6 +947,8 @@ typedef enum CursorSprites {
 	SPR_CURSOR_BUS_STATION    = 2725,
 	SPR_CURSOR_TRUCK_STATION  = 2726,
 	SPR_CURSOR_ROAD_TUNNEL    = 2433,
+
+	SPR_CURSOR_CLONE = SPR_OPENTTD_BASE + 100,
 } CursorSprite;
 
 /// Animation macro in table/animcursors.h (_animcursors[])

train_cmd.c

@@ -568,7 +568,7 @@ void AddRearEngineToMultiheadedTrain(Vehicle *v, Vehicle *u, bool building)
 /** Build a railroad vehicle.
  * @param x,y tile coordinates (depot) where rail-vehicle is built
  * @param p1 engine type id
- * @param p2 unused
+ * @param p2 build only one engine, even if it is a dualheaded engine. It also prevents any free cars from being added to the train
  */
 int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 {
@@ -594,10 +594,19 @@ int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 	SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES);
 
 	rvi = RailVehInfo(p1);
+	e = GetEngine(p1);
+
+	/* Check if depot and new engine uses the same kind of tracks */
+	if (!IsCompatibleRail(e->railtype, GetRailType(tile))) return CMD_ERROR;
 
 	if (rvi->flags & RVI_WAGON) return CmdBuildRailWagon(p1, tile, flags);
 
 	value = EstimateTrainCost(rvi);
+		
+	//make sure we only pay for half a dualheaded engine if we only requested half of it
+	if (rvi->flags&RVI_MULTIHEAD && HASBIT(p2,0))
+		value /= 2;
+	
 
 	if (!(flags & DC_QUERY_COST)) {
 		v = AllocateVehicle();
@@ -633,7 +642,6 @@ int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 			v->dest_tile = 0;
 
 			v->engine_type = (byte)p1;
-			e = GetEngine(p1);
 
 			v->reliability = e->reliability;
 			v->reliability_spd_dec = e->reliability_spd_dec;
@@ -651,12 +659,16 @@ int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 
 			VehiclePositionChanged(v);
 
-			if (rvi->flags&RVI_MULTIHEAD && (u = AllocateVehicle()) != NULL)
-				AddRearEngineToMultiheadedTrain(v, u, true);
+			if (rvi->flags&RVI_MULTIHEAD && (u = AllocateVehicle()) != NULL && !HASBIT(p2,0)) {
+					AddRearEngineToMultiheadedTrain(v, u, true);
+			}
 
 			TrainConsistChanged(v);
 			UpdateTrainAcceleration(v);
-			NormalizeTrainVehInDepot(v);
+
+			if (!HASBIT(p2,0)) {	// do not move the cars if HASBIT(p2,0) is set
+				NormalizeTrainVehInDepot(v);
+			}
 
 			InvalidateWindow(WC_VEHICLE_DEPOT, tile);
 			RebuildVehicleLists();
@@ -1472,10 +1484,7 @@ int32 CmdForceTrainProceed(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 /** Refits a train to the specified cargo type.
  * @param x,y unused
  * @param p1 vehicle ID of the train to refit
- * @param p2 various bitstuffed elements
- * - p2 = (bit 0-7) - the new cargo type to refit to (p2 & 0xFF)
- * - p2 = (bit 8)   - skip check for stopped in depot, used by autoreplace (p2 & 0x100)
- * @todo p2 bit8 check <b>NEEDS TO GO</b>
+ * @param p2 the new cargo type to refit to (p2 & 0xFF)
  */
 int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 {
@@ -1483,14 +1492,13 @@ int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 	int32 cost;
 	uint num;
 	CargoID new_cid = p2 & 0xFF; //gets the cargo number
-	bool SkipStoppedInDepotCheck = !!HASBIT(p2, 8); // XXX - needs to go, yes?
 
 	if (!IsVehicleIndex(p1)) return CMD_ERROR;
 
 	v = GetVehicle(p1);
 
 	if (v->type != VEH_Train || !CheckOwnership(v->owner)) return CMD_ERROR;
-	if (!SkipStoppedInDepotCheck && CheckTrainStoppedInDepot(v) < 0) return_cmd_error(STR_TRAIN_MUST_BE_STOPPED);
+	if (CheckTrainStoppedInDepot(v) < 0) return_cmd_error(STR_TRAIN_MUST_BE_STOPPED);
 
 	/* Check cargo */
 	if (new_cid > NUM_CARGO) return CMD_ERROR;
@@ -1537,10 +1545,7 @@ int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 					cost += (_price.build_railvehicle >> 8);
 				num += amount;
 				if (flags & DC_EXEC) {
-					//autorefitted train cars wants to keep the cargo
-					//it will be checked if the cargo is valid in CmdReplaceVehicle
-					if (!(SkipStoppedInDepotCheck))
-						v->cargo_count = 0;
+					v->cargo_count = 0;
 					v->cargo_type = new_cid;
 					v->cargo_cap = amount;
 					InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
@@ -1548,8 +1553,7 @@ int32 CmdRefitRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 				}
 			}
 		}
-	// SkipStoppedInDepotCheck is called by CmdReplace and it should only apply to the single car it is called for
-	} while ( (v=v->next) != NULL || SkipStoppedInDepotCheck );
+	} while ( (v=v->next) != NULL );
 
 	_returned_refit_amount = num;
 

train_gui.c

@@ -154,6 +154,17 @@ void CcBuildLoco(bool success, TileIndex tile, uint32 p1, uint32 p2)
 	ShowTrainViewWindow(v);
 }
 
+void CcCloneTrain(bool success, uint tile, uint32 p1, uint32 p2)
+{
+	Vehicle *v;
+
+	if (!success)
+		return;
+
+	v = GetVehicle(_new_train_id);
+	ShowTrainViewWindow(v);
+}
+
 static void engine_drawing_loop(int *x, int *y, int *pos, int *sel,
 	int *selected_id, byte railtype, byte show_max, bool is_engine)
 {
@@ -366,7 +377,7 @@ static void DrawTrainDepotWindow(Window *w)
 
 	/* setup disabled buttons */
 	w->disabled_state =
-		IsTileOwner(tile, _local_player) ? 0 : ((1 << 4) | (1 << 5) | (1 << 8));
+		IsTileOwner(tile, _local_player) ? 0 : ((1 << 4) | (1 << 5) | (1 << 8) | (1<<9));
 
 	/* determine amount of items for scroller */
 	num = 0;
@@ -580,6 +591,47 @@ static void TrainDepotClickTrain(Window *w, int x, int y)
 	}
 }
 
+/**
+ * Clones a train
+ * @param *v is the original vehicle to clone
+ * @param *w is the window of the depot where the clone is build
+ */
+static bool HandleCloneVehClick(Vehicle *v, Window *w)
+{
+
+	if (!v){
+		return false;
+	}
+
+	// for train vehicles: subtype 0 for locs and not zero for others
+	if (v->type == VEH_Train && v->subtype != 0) {
+		v = GetFirstVehicleInChain(v);
+		if (v->subtype != 0) // This happens when clicking on a train in depot with no loc attached
+			return false;
+	}else{
+		if (v->type != VEH_Train) {
+			// it's not a train, Do Nothing
+			return false;
+		}
+	}
+
+    DoCommandP(w->window_number, v->index, _ctrl_pressed ? 1 : 0, CcCloneTrain, CMD_CLONE_VEHICLE | CMD_MSG(STR_882B_CAN_T_BUILD_RAILROAD_VEHICLE));
+
+	ResetObjectToPlace();
+
+	return true;
+}
+
+static void ClonePlaceObj(uint tile, Window *w)
+{
+	Vehicle *v;
+
+
+	v = CheckMouseOverVehicle();
+	if (v && HandleCloneVehClick(v, w))
+		return;
+}
+
 static void TrainDepotWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {
@@ -590,17 +642,51 @@ static void TrainDepotWndProc(Window *w, WindowEvent *e)
 	case WE_CLICK: {
 		switch(e->click.widget) {
 		case 8:
+			ResetObjectToPlace();
 			ShowBuildTrainWindow(w->window_number);
 			break;
-		case 9:
+		case 10:
+			ResetObjectToPlace();
 			ScrollMainWindowToTile(w->window_number);
 			break;
 		case 6:
 			TrainDepotClickTrain(w, e->click.pt.x, e->click.pt.y);
 			break;
+		case 9: /* clone button */
+			InvalidateWidget(w, 9);
+			TOGGLEBIT(w->click_state, 9);
+
+			if (HASBIT(w->click_state, 9)) {
+				_place_clicked_vehicle = NULL;
+				SetObjectToPlaceWnd(SPR_CURSOR_CLONE, VHM_RECT, w);
+			} else {
+				ResetObjectToPlace();
+			}
+			break;
+
+ 		}
+ 	} break;
+ 
+	case WE_PLACE_OBJ: {
+		ClonePlaceObj(e->place.tile, w);
+	} break;
+
+	case WE_ABORT_PLACE_OBJ: {
+		CLRBIT(w->click_state, 9);
+		InvalidateWidget(w, 9);
+	} break;
+	
+	// check if a vehicle in a depot was clicked..
+	case WE_MOUSELOOP: {
+		Vehicle *v = _place_clicked_vehicle;
+	// since OTTD checks all open depot windows, we will make sure that it triggers the one with a clicked clone button
+		if (v != NULL && HASBIT(w->click_state, 9)) {
+			_place_clicked_vehicle = NULL;
+			HandleCloneVehClick( v, w);
 		}
 	} break;
 
+
 	case WE_DESTROY:
 		DeleteWindowById(WC_BUILD_VEHICLE, w->window_number);
 		break;
@@ -680,10 +766,14 @@ static const Widget _train_depot_widgets[] = {
 
 {     WWT_MATRIX,     RESIZE_RB,    14,     0,   325,    14,    97, 0x601,									STR_883F_TRAINS_CLICK_ON_TRAIN_FOR},
 {  WWT_SCROLLBAR,    RESIZE_LRB,    14,   349,   360,    14,   109, 0x0,										STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   167,   110,   121, STR_8815_NEW_VEHICLES,	STR_8840_BUILD_NEW_TRAIN_VEHICLE},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   168,   348,   110,   121, STR_00E4_LOCATION,			STR_8842_CENTER_MAIN_VIEW_ON_TRAIN},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   116,   110,   121, STR_8815_NEW_VEHICLES,	STR_8840_BUILD_NEW_TRAIN_VEHICLE},
+{WWT_NODISTXTBTN,     RESIZE_TB,    14,   117,   232,   110,   121, STR_CLONE_TRAIN,		STR_CLONE_TRAIN_DEPOT_INFO},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   233,   348,   110,   121, STR_00E4_LOCATION,			STR_8842_CENTER_MAIN_VIEW_ON_TRAIN},
+
+
 { WWT_HSCROLLBAR,    RESIZE_RTB,    14,     0,   325,    98,   109, 0x0,										STR_HSCROLL_BAR_SCROLLS_LIST},
 {      WWT_PANEL,    RESIZE_RTB,    14,   349,   348,   110,   121, 0x0,										STR_NULL},
+
 {  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   349,   360,   110,   121, 0x0,										STR_RESIZE_BUTTON},
 {   WIDGETS_END},
 };
@@ -803,6 +893,7 @@ static Widget _train_view_widgets[] = {
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  86, 103, 0x2B2,    STR_8847_SHOW_TRAIN_S_ORDERS },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249, 104, 121, 0x2B3,    STR_884C_SHOW_TRAIN_DETAILS },
 { WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  68,  85, 0x2B4,    STR_RAIL_REFIT_VEHICLE_TO_CARRY },
+{ WWT_PUSHIMGBTN, RESIZE_LR,    14, 232, 249,  32,  49, SPR_CLONE_TRAIN,      STR_CLONE_TRAIN_INFO },
 { WWT_PANEL,      RESIZE_LRB,   14, 232, 249, 122, 121, 0x0,      STR_NULL },
 { WWT_RESIZEBOX,  RESIZE_LRTB,  14, 238, 249, 122, 133, 0x0,      STR_NULL },
 { WIDGETS_END }
@@ -833,7 +924,7 @@ static void TrainViewWndProc(Window *w, WindowEvent *e)
 
 		/* draw widgets & caption */
 		SetDParam(0, v->string_id);
-		SetDParam(1, v->unitnumber);
+		SetDParam(1, v->unitnumber); 
 		DrawWindowWidgets(w);
 
 		if (v->u.rail.crash_anim_pos != 0) {
@@ -920,6 +1011,9 @@ static void TrainViewWndProc(Window *w, WindowEvent *e)
 		case 12:
 			ShowRailVehicleRefitWindow(v);
 			break;
+		case 13:
+			DoCommandP(v->tile, v->index, _ctrl_pressed ? 1 : 0, NULL, CMD_CLONE_VEHICLE | CMD_MSG(STR_882B_CAN_T_BUILD_RAILROAD_VEHICLE));
+			break;
 		}
 	} break;
 
@@ -942,7 +1036,7 @@ static void TrainViewWndProc(Window *w, WindowEvent *e)
 
 		v = GetVehicle(w->window_number);
 		assert(v->type == VEH_Train);
-		h = CheckTrainStoppedInDepot(v) >= 0 ? (1 << 9) : (1 << 12);
+		h = CheckTrainStoppedInDepot(v) >= 0 ? (1 << 9)| (1 << 7) : (1 << 12) | (1 << 13);
 		if (h != w->hidden_state) {
 			w->hidden_state = h;
 			SetWindowDirty(w);

vehicle.c

@@ -21,6 +21,7 @@
 #include "vehicle_gui.h"
 #include "depot.h"
 #include "station.h"
+#include "gui.h"
 #include "rail.h"
 
 #define INVALID_COORD (-0x8000)
@@ -1669,6 +1670,122 @@ void MaybeReplaceVehicle(Vehicle *v)
 	_current_player = OWNER_NONE;
 }
 
+int32 CmdCloneOrder(int x, int y, uint32 flags, uint32 veh1_veh2, uint32 mode);
+int32 CmdMoveRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+int32 CmdBuildRoadVeh(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+int32 CmdBuildShip(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+int32 CmdBuildAircraft(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+ 
+
+typedef int32 VehBuildProc(int x, int y, uint32 flags, uint32 p1, uint32 p2);
+
+static VehBuildProc * const _veh_build_proc_table[] = {
+	CmdBuildRailVehicle,
+	CmdBuildRoadVeh,
+	CmdBuildShip,
+	CmdBuildAircraft,
+};
+
+static VehicleID * _new_vehicle_id_proc_table[] = {
+	&_new_train_id,
+	&_new_roadveh_id,
+	&_new_ship_id,
+	&_new_aircraft_id,	
+};
+
+/** Clone a vehicle. If it is a train, it will clone all the cars too
+  * @param x,y unused
+  * @param p1 the original vehicle's index
+  * @param p2 1 = shared orders, else copied orders
+  */
+int32 CmdCloneVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2)
+{
+	Vehicle *vfront, *v;
+	Vehicle *wfront, *w1, *w2;
+	int cost, total_cost;
+	VehBuildProc *proc;
+	VehicleID *new_id;
+	uint refit_command = 0;
+	byte needs_refitting = 255;
+
+	if (!IsVehicleIndex(p1))
+		return CMD_ERROR;
+	v = GetVehicle(p1);
+	wfront = v; 
+	w1 = v;
+	vfront = v;
+
+	if (!CheckOwnership(v->owner))
+		return CMD_ERROR;
+
+	if (v->type == VEH_Train && v->subtype != TS_Front_Engine) return CMD_ERROR;
+
+	//no need to check if it is a depot since the build command do that
+	switch (v->type) {
+		case VEH_Train:		refit_command = CMD_REFIT_RAIL_VEHICLE; break;
+		case VEH_Road:		break;
+		case VEH_Ship:		refit_command = CMD_REFIT_SHIP; break;
+		case VEH_Aircraft:	refit_command = CMD_REFIT_AIRCRAFT; break;
+		default: return CMD_ERROR;
+	}
+
+	proc = _veh_build_proc_table[v->type - VEH_Train];
+	new_id = _new_vehicle_id_proc_table[v->type - VEH_Train];
+	total_cost = proc(x, y, flags, v->engine_type, 1);
+	if (total_cost == CMD_ERROR)
+		return CMD_ERROR;
+
+	if (flags & DC_EXEC) {
+		wfront = GetVehicle(*new_id);
+		w1 = wfront;
+		CmdCloneOrder(x, y, flags, (v->index << 16) | w1->index, p2 & 1 ? CO_SHARE : CO_COPY);
+
+		if (wfront->cargo_type != v->cargo_type) {
+			//a refit is needed
+			needs_refitting = v->cargo_type;
+		}
+	}
+	if (v->type == VEH_Train) {
+		// now we handle the cars
+		v = v->next;
+		while (v != NULL) {
+			cost = proc(x, y, flags, v->engine_type, 1);
+			if (cost == CMD_ERROR)
+				return CMD_ERROR;
+			total_cost += cost;
+
+			if (flags & DC_EXEC) {
+				// add this unit to the end of the train
+				w2 = GetVehicle(RailVehInfo(v->engine_type)->flags & RVI_WAGON ? _new_wagon_id : _new_train_id);
+				CmdMoveRailVehicle(x, y, flags, (w1->index << 16) | w2->index, 0);
+				w1 = w2;
+			}
+			v = v->next;
+		}
+
+		if (flags & DC_EXEC) {
+			_new_train_id = wfront->index;
+			v = vfront;
+			w1 = wfront;
+			while (w1 != NULL && v != NULL) {
+				w1->spritenum = v->spritenum; // makes sure that multiheaded engines are facing the correct way
+				if (w1->cargo_type != v->cargo_type)	// checks if a refit is needed
+					needs_refitting = v->cargo_type;
+				w1 = w1->next;
+				v = v->next;
+			}
+			
+		}
+	}
+	if (flags && DC_EXEC && needs_refitting != 255 && v->type != VEH_Road) {	// right now we do not refit road vehicles
+		if (DoCommandByTile(wfront->tile, wfront->index, needs_refitting, 0, refit_command) != CMD_ERROR)
+			DoCommandByTile(wfront->tile, wfront->index, needs_refitting, DC_EXEC, refit_command);
+	}
+	return total_cost;
+}
+
+
 /** Give a custom name to your vehicle
  * @param x,y unused
  * @param p1 vehicle ID to name