diff --git a/src/build_vehicle_gui.c b/src/build_vehicle_gui.c
deleted file mode 100644
--- a/src/build_vehicle_gui.c
+++ /dev/null
@@ -1,492 +0,0 @@
-/* $Id$ */
-
-#include "stdafx.h"
-#include "openttd.h"
-#include "aircraft.h"
-#include "debug.h"
-#include "functions.h"
-#include "table/sprites.h"
-#include "table/strings.h"
-#include "window.h"
-#include "gui.h"
-#include "vehicle.h"
-#include "gfx.h"
-#include "station.h"
-#include "command.h"
-#include "engine.h"
-#include "player.h"
-#include "depot.h"
-#include "airport.h"
-#include "vehicle_gui.h"
-#include "newgrf_engine.h"
-#include "date.h"
-#include "strings.h"
-
-
-enum BuildVehicleWidgets {
-	BUILD_VEHICLE_WIDGET_CLOSEBOX = 0,
-	BUILD_VEHICLE_WIDGET_CAPTION,
-	BUILD_VEHICLE_WIDGET_SORT_ASSENDING_DESCENDING,
-	BUILD_VEHICLE_WIDGET_SORT_TEXT,
-	BUILD_VEHICLE_WIDGET_SORT_DROPDOWN,
-	BUILD_VEHICLE_WIDGET_LIST,
-	BUILD_VEHICLE_WIDGET_SCROLLBAR,
-	BUILD_VEHICLE_WIDGET_PANEL,
-	BUILD_VEHICLE_WIDGET_BUILD,
-	BUILD_VEHICLE_WIDGET_RENAME,
-	BUILD_VEHICLE_WIDGET_RESIZE,
-};
-
-static const Widget _build_vehicle_widgets[] = {
-	{   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,                STR_018B_CLOSE_WINDOW },
-	{    WWT_CAPTION,   RESIZE_NONE,    14,    11,   239,     0,    13, STR_A005_NEW_AIRCRAFT,   STR_018C_WINDOW_TITLE_DRAG_THIS },
-	{ WWT_PUSHTXTBTN,   RESIZE_NONE,    14,     0,    80,    14,    25, STR_SORT_BY,             STR_SORT_ORDER_TIP},
-	{      WWT_PANEL,   RESIZE_NONE,    14,    81,   227,    14,    25, 0x0,                     STR_SORT_CRITERIA_TIP},
-	{    WWT_TEXTBTN,   RESIZE_NONE,    14,   228,   239,    14,    25, STR_0225,                STR_SORT_CRITERIA_TIP},
-	{     WWT_MATRIX, RESIZE_BOTTOM,    14,     0,   227,    26,   121, 0x401,                   STR_A025_AIRCRAFT_SELECTION_LIST },
-	{  WWT_SCROLLBAR, RESIZE_BOTTOM,    14,   228,   239,    26,   121, 0x0,                     STR_0190_SCROLL_BAR_SCROLLS_LIST },
-	{      WWT_PANEL,     RESIZE_TB,    14,     0,   239,   122,   213, 0x0,                     STR_NULL },
-
-	{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,   114,   214,   225, STR_A006_BUILD_AIRCRAFT, STR_A026_BUILD_THE_HIGHLIGHTED_AIRCRAFT },
-	{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   115,   227,   214,   225, STR_A037_RENAME,         STR_A038_RENAME_AIRCRAFT_TYPE },
-	{  WWT_RESIZEBOX,     RESIZE_TB,    14,   228,   239,   214,   225, 0x0,                     STR_RESIZE_BUTTON },
-	{   WIDGETS_END},
-};
-
-static bool _internal_sort_order; // descending/ascending
-static byte _last_sort_criteria = 0;
-static bool _last_sort_order = false;
-
-static int CDECL EngineNumberSorter(const void *a, const void *b)
-{
-	const EngineID va = *(const EngineID*)a;
-	const EngineID vb = *(const EngineID*)b;
-	int r = va - vb;
-
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL EngineIntroDateSorter(const void *a, const void *b)
-{
-	const int va = GetEngine(*(const EngineID*)a)->intro_date;
-	const int vb = GetEngine(*(const EngineID*)b)->intro_date;
-	const int r = va - vb;
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL EngineNameSorter(const void *a, const void *b)
-{
-	static EngineID last_engine[2] = { INVALID_ENGINE, INVALID_ENGINE };
-	static char     last_name[2][64] = { "\0", "\0" };
-
-	const EngineID va = *(const EngineID*)a;
-	const EngineID vb = *(const EngineID*)b;
-	int r;
-
-	if (va != last_engine[0]) {
-		last_engine[0] = va;
-		GetString(last_name[0], GetCustomEngineName(va), lastof(last_name[0]));
-	}
-
-	if (vb != last_engine[1]) {
-		last_engine[1] = vb;
-		GetString(last_name[1], GetCustomEngineName(vb), lastof(last_name[1]));
-	}
-
-	r = strcmp(last_name[0], last_name[1]); // sort by name
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL EngineReliabilitySorter(const void *a, const void *b)
-{
-	const int va = GetEngine(*(const EngineID*)a)->reliability;
-	const int vb = GetEngine(*(const EngineID*)b)->reliability;
-	const int r = va - vb;
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-/* Aircraft sorting functions */
-
-static int CDECL AircraftEngineCostSorter(const void *a, const void *b)
-{
-	const int va = AircraftVehInfo(*(const EngineID*)a)->base_cost;
-	const int vb = AircraftVehInfo(*(const EngineID*)b)->base_cost;
-	int r = va - vb;
-
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL AircraftEngineSpeedSorter(const void *a, const void *b)
-{
-	const int va = AircraftVehInfo(*(const EngineID*)a)->max_speed;
-	const int vb = AircraftVehInfo(*(const EngineID*)b)->max_speed;
-	const int r = va - vb;
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL AircraftEngineRunningCostSorter(const void *a, const void *b)
-{
-	const int va = AircraftVehInfo(*(const EngineID*)a)->running_cost;
-	const int vb = AircraftVehInfo(*(const EngineID*)b)->running_cost;
-	const int r = va - vb;
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-static int CDECL AircraftEngineCargoSorter(const void *a, const void *b)
-{
-	const int va = AircraftVehInfo(*(const EngineID*)a)->passenger_capacity;
-	const int vb = AircraftVehInfo(*(const EngineID*)b)->passenger_capacity;
-	const int r = va - vb;
-
-	if (r == 0) {
-		/* Use EngineID to sort instead since we want consistent sorting */
-		return EngineNumberSorter(a, b);
-	}
-	return _internal_sort_order ? -r : r;
-}
-
-static EngList_SortTypeFunction * const _aircraft_sorter[] = {
-	&EngineNumberSorter,
-	&AircraftEngineCostSorter,
-	&AircraftEngineSpeedSorter,
-	&EngineIntroDateSorter,
-	&EngineNameSorter,
-	&AircraftEngineRunningCostSorter,
-	&EngineReliabilitySorter,
-	&AircraftEngineCargoSorter,
-};
-
-static const StringID _aircraft_sort_listing[] = {
-	STR_ENGINE_SORT_ENGINE_ID,
-	STR_ENGINE_SORT_COST,
-	STR_SORT_BY_MAX_SPEED,
-	STR_ENGINE_SORT_INTRO_DATE,
-	STR_SORT_BY_DROPDOWN_NAME,
-	STR_ENGINE_SORT_RUNNING_COST,
-	STR_SORT_BY_RELIABILITY,
-	STR_ENGINE_SORT_CARGO_CAPACITY,
-	INVALID_STRING_ID
-};
-
-
-/**
-* Draw the purchase info details of an aircraft at a given location.
- * @param x,y location where to draw the info
- * @param engine_number the engine of which to draw the info of
- */
-void DrawAircraftPurchaseInfo(int x, int y, uint w, EngineID engine_number)
-{
-	const AircraftVehicleInfo *avi = AircraftVehInfo(engine_number);
-	const Engine *e = GetEngine(engine_number);
-	CargoID cargo;
-	YearMonthDay ymd;
-	ConvertDateToYMD(e->intro_date, &ymd);
-
-	/* Purchase cost - Max speed */
-	SetDParam(0, avi->base_cost * (_price.aircraft_base>>3)>>5);
-	SetDParam(1, avi->max_speed * 128 / 10);
-	DrawString(x, y, STR_PURCHASE_INFO_COST_SPEED, 0);
-	y += 10;
-
-	/* Cargo capacity */
-	cargo = FindFirstRefittableCargo(engine_number);
-	if (cargo == CT_INVALID || cargo == CT_PASSENGERS) {
-		SetDParam(0, avi->passenger_capacity);
-		SetDParam(1, avi->mail_capacity);
-		DrawString(x, y, STR_PURCHASE_INFO_AIRCRAFT_CAPACITY, 0);
-	} else {
-		/* Note, if the default capacity is selected by the refit capacity
-		* callback, then the capacity shown is likely to be incorrect. */
-		SetDParam(0, cargo);
-		SetDParam(1, AircraftDefaultCargoCapacity(cargo, engine_number));
-		SetDParam(2, STR_9842_REFITTABLE);
-		DrawString(x, y, STR_PURCHASE_INFO_CAPACITY, 0);
-	}
-	y += 10;
-
-	/* Running cost */
-	SetDParam(0, avi->running_cost * _price.aircraft_running >> 8);
-	DrawString(x, y, STR_PURCHASE_INFO_RUNNINGCOST, 0);
-	y += 10;
-
-	/* Design date - Life length */
-	SetDParam(0, ymd.year);
-	SetDParam(1, e->lifelength);
-	DrawString(x, y, STR_PURCHASE_INFO_DESIGNED_LIFE, 0);
-	y += 10;
-
-	/* Reliability */
-	SetDParam(0, e->reliability * 100 >> 16);
-	DrawString(x, y, STR_PURCHASE_INFO_RELIABILITY, 0);
-	y += 10;
-
-	/* Additional text from NewGRF */
-	y += ShowAdditionalText(x, y, w, engine_number);
-	y += ShowRefitOptionsList(x, y, w, engine_number);
-}
-
-void DrawAircraftImage(const Vehicle *v, int x, int y, VehicleID selection)
-{
-	PalSpriteID pal = (v->vehstatus & VS_CRASHED) ? PALETTE_CRASH : GetVehiclePalette(v);
-	DrawSprite(GetAircraftImage(v, DIR_W) | pal, x + 25, y + 10);
-	if (v->subtype == 0) {
-		SpriteID rotor_sprite = GetCustomRotorSprite(v, true);
-		if (rotor_sprite == 0) rotor_sprite = SPR_ROTOR_STOPPED;
-		DrawSprite(rotor_sprite, x + 25, y + 5);
-	}
-	if (v->index == selection) {
-		DrawFrameRect(x - 1, y - 1, x + 58, y + 21, 0xF, FR_BORDERONLY);
-	}
-}
-
-void CcBuildAircraft(bool success, TileIndex tile, uint32 p1, uint32 p2)
-{
-	if (success) {
-		const Vehicle *v = GetVehicle(_new_vehicle_id);
-
-		if (v->tile == _backup_orders_tile) {
-			_backup_orders_tile = 0;
-			RestoreVehicleOrders(v, _backup_orders_data);
-		}
-		ShowAircraftViewWindow(v);
-	}
-}
-
-static void GenerateBuildAircraftList(Window *w)
-{
-	EngineID eid, sel_id;
-	buildvehicle_d *bv = &WP(w, buildvehicle_d);
-
-	EngList_RemoveAll(&bv->eng_list);
-
-	/* Make list of all available planes.
-	 * Also check to see if the previously selected plane is still available,
-	 * and if not, reset selection to INVALID_ENGINE. This could be the case
-	 * when planes become obsolete and are removed */
-	sel_id = INVALID_ENGINE;
-	for (eid = AIRCRAFT_ENGINES_INDEX; eid < AIRCRAFT_ENGINES_INDEX + NUM_AIRCRAFT_ENGINES; eid++) {
-		if (IsEngineBuildable(eid, VEH_Aircraft, _local_player)) {
-			const AircraftVehicleInfo *avi = AircraftVehInfo(eid);
-			switch (bv->filter.acc_planes) {
-				case HELICOPTERS_ONLY:
-					if (avi->subtype != 0) continue; // if not helicopter
-					break;
-
-				case AIRCRAFT_ONLY:
-					if (avi->subtype == 0) continue; // if helicopter
-					break;
-
-				case ALL: break;
-			}
-			EngList_Add(&bv->eng_list, eid);
-
-			if (eid == bv->sel_engine) sel_id = eid;
-		}
-	}
-
-	bv->sel_engine = sel_id;
-}
-
-static void GenerateBuildList(Window *w)
-{
-	buildvehicle_d *bv = &WP(w, buildvehicle_d);
-
-	switch (bv->vehicle_type) {
-		case VEH_Aircraft:
-			GenerateBuildAircraftList(w);
-			_internal_sort_order = bv->descending_sort_order;
-			EngList_Sort(&bv->eng_list, _aircraft_sorter[bv->sort_criteria]);
-			break;
-
-		default: NOT_REACHED();
-	}
-}
-
-static void DrawBuildAircraftWindow(Window *w)
-{
-	const buildvehicle_d *bv = &WP(w, buildvehicle_d);
-
-	SetWindowWidgetDisabledState(w, BUILD_VEHICLE_WIDGET_BUILD, w->window_number == 0);
-
-	SetVScrollCount(w, EngList_Count(&bv->eng_list));
-	DrawWindowWidgets(w);
-
-	{
-		int x = 2;
-		int y = 27;
-		EngineID selected_id = bv->sel_engine;
-		EngineID eid = w->vscroll.pos;
-		uint16 max = min(w->vscroll.pos + w->vscroll.cap, EngList_Count(&bv->eng_list));
-
-		for (; eid < max; eid++) {
-			const EngineID engine = bv->eng_list[eid];
-
-			DrawString(x + 62, y + 7, GetCustomEngineName(engine), engine == selected_id ? 0xC : 0x10);
-			DrawAircraftEngine(x + 29, y + 10, engine, GetEnginePalette(engine, _local_player));
-			y += 24;
-		}
-
-		if (selected_id != INVALID_ENGINE) {
-			const Widget *wi = &w->widget[BUILD_VEHICLE_WIDGET_PANEL];
-			DrawAircraftPurchaseInfo(x, wi->top + 1, wi->right - wi->left - 2, selected_id);
-		}
-	}
-	DrawString(85, 15, _aircraft_sort_listing[bv->sort_criteria], 0x10);
-	DoDrawString(bv->descending_sort_order ? DOWNARROW : UPARROW, 69, 15, 0x10);
-}
-
-static void BuildAircraftClickEvent(Window *w, WindowEvent *e)
-{
-	buildvehicle_d *bv = &WP(w, buildvehicle_d);
-
-	switch (e->we.click.widget) {
-		case BUILD_VEHICLE_WIDGET_SORT_ASSENDING_DESCENDING:
-			bv->descending_sort_order ^= true;
-			_last_sort_order = bv->descending_sort_order;
-			GenerateBuildList(w);
-			SetWindowDirty(w);
-			break;
-
-		case BUILD_VEHICLE_WIDGET_LIST: {
-			uint i = (e->we.click.pt.y - 26) / 24 + w->vscroll.pos;
-			uint num_items = EngList_Count(&bv->eng_list);
-			bv->sel_engine = (i < num_items) ? bv->eng_list[i] : INVALID_ENGINE;
-			SetWindowDirty(w);
-			break;
-		}
-
-		case BUILD_VEHICLE_WIDGET_SORT_TEXT: case BUILD_VEHICLE_WIDGET_SORT_DROPDOWN:/* Select sorting criteria dropdown menu */
-			ShowDropDownMenu(w, _aircraft_sort_listing, bv->sort_criteria, BUILD_VEHICLE_WIDGET_SORT_DROPDOWN, 0, 0);
-			return;
-
-		case BUILD_VEHICLE_WIDGET_BUILD: {
-			EngineID sel_eng = bv->sel_engine;
-			if (sel_eng != INVALID_ENGINE) {
-				DoCommandP(w->window_number, sel_eng, 0, CcBuildAircraft, CMD_BUILD_AIRCRAFT | CMD_MSG(STR_A008_CAN_T_BUILD_AIRCRAFT));
-			}
-			break;
-		}
-
-		case BUILD_VEHICLE_WIDGET_RENAME: {
-			EngineID sel_eng = bv->sel_engine;
-			if (sel_eng != INVALID_ENGINE) {
-				bv->rename_engine = sel_eng;
-				ShowQueryString(GetCustomEngineName(sel_eng), STR_A039_RENAME_AIRCRAFT_TYPE, 31, 160, w, CS_ALPHANUMERAL);
-			}
-			break;
-		}
-	}
-}
-
-static void NewAircraftWndProc(Window *w, WindowEvent *e)
-{
-	buildvehicle_d *bv = &WP(w, buildvehicle_d);
-
-	switch (e->event) {
-		case WE_INVALIDATE_DATA:
-			GenerateBuildList(w);
-			break;
-
-		case WE_DESTROY:
-			EngList_Destroy(&bv->eng_list);
-			break;
-
-		case WE_PAINT:
-			DrawBuildAircraftWindow(w);
-			break;
-
-		case WE_CLICK:
-			BuildAircraftClickEvent(w, e);
-			break;
-
-		case WE_ON_EDIT_TEXT: {
-			if (e->we.edittext.str[0] != '\0') {
-				_cmd_text = e->we.edittext.str;
-				DoCommandP(0, bv->rename_engine, 0, NULL, CMD_RENAME_ENGINE | CMD_MSG(STR_A03A_CAN_T_RENAME_AIRCRAFT_TYPE));
-			}
-			break;
-		}
-
-		case WE_DROPDOWN_SELECT: /* we have selected a dropdown item in the list */
-			if (bv->sort_criteria != e->we.dropdown.index) {
-				bv->sort_criteria = _last_sort_criteria = e->we.dropdown.index;
-				GenerateBuildList(w);
-			}
-			SetWindowDirty(w);
-			break;
-
-		case WE_RESIZE:
-			w->vscroll.cap += e->we.sizing.diff.y / 24;
-			w->widget[BUILD_VEHICLE_WIDGET_LIST].data = (w->vscroll.cap << 8) + 1;
-			break;
-	}
-}
-
-static const WindowDesc _build_vehicle_desc = {
-	WDP_AUTO, WDP_AUTO, 240, 226,
-	WC_BUILD_VEHICLE,0,
-	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_RESIZABLE,
-	_build_vehicle_widgets,
-	NewAircraftWndProc
-};
-
-void ShowBuildVehicleWindow(TileIndex tile, byte type)
-{
-	buildvehicle_d *bv;
-	Window *w;
-
-	DeleteWindowById(WC_BUILD_VEHICLE, tile);
-	w = AllocateWindowDescFront(&_build_vehicle_desc, tile);
-	if (w == NULL) return;
-
-	w->caption_color = (tile != 0) ? GetTileOwner(tile) : _local_player;
-	w->resize.step_height = GetVehicleListHeight(type);
-	w->vscroll.cap = 4;
-	w->widget[BUILD_VEHICLE_WIDGET_LIST].data = (w->vscroll.cap << 8) + 1;
-
-	bv = &WP(w, buildvehicle_d);
-	EngList_Create(&bv->eng_list);
-	bv->sel_engine            = INVALID_ENGINE;
-	bv->sort_criteria         = _last_sort_criteria;
-	bv->descending_sort_order = _last_sort_order;
-
-	bv->vehicle_type = type;
-
-	switch (type) {
-		case VEH_Aircraft: {
-			byte acc_planes = (tile == 0) ? ALL : GetAirport(GetStationByTile(tile)->airport_type)->acc_planes;
-			bv->filter.acc_planes = acc_planes;
-			break;
-		}
-		default: NOT_REACHED();
-	}
-
-	GenerateBuildList(w);
-	/* Select the first plane in the list as default when opening the window */
-	if (EngList_Count(&bv->eng_list) > 0) bv->sel_engine = bv->eng_list[0];
-}