Files @ r23516:763b689dacfc
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Location: cpp/openttd-patchpack/source/src/autoreplace_gui.cpp - annotation

Henry Wilson
Codechange: [core] Implement SmallVector using std::vector

The public and protected interface to SmallVector are unchanged
SmallVector now requires that items be default constructible
This isn't an issue since some contained items were previously created
uninitialized.

Temporary default constructors are added to the following structs
- SmallPair
- SmallStackItem
- GRFPresence

Where vector<bool> is required, transition immediately to std::vector
to avoid returning proxy object references.
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/* $Id$ */

/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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/>.
 */

/** @file autoreplace_gui.cpp GUI for autoreplace handling. */

#include "stdafx.h"
#include "command_func.h"
#include "vehicle_gui.h"
#include "newgrf_engine.h"
#include "rail.h"
#include "strings_func.h"
#include "window_func.h"
#include "autoreplace_func.h"
#include "company_func.h"
#include "engine_base.h"
#include "window_gui.h"
#include "engine_gui.h"
#include "settings_func.h"
#include "core/geometry_func.hpp"
#include "rail_gui.h"
#include "widgets/dropdown_func.h"

#include "widgets/autoreplace_widget.h"

#include "safeguards.h"

void DrawEngineList(VehicleType type, int x, int r, int y, const GUIEngineList *eng_list, uint16 min, uint16 max, EngineID selected_id, bool show_count, GroupID selected_group);

static int CDECL EngineNumberSorter(const EngineID *a, const EngineID *b)
{
	int r = Engine::Get(*a)->list_position - Engine::Get(*b)->list_position;

	return r;
}

/**
 * Rebuild the left autoreplace list if an engine is removed or added
 * @param e Engine to check if it is removed or added
 * @param id_g The group the engine belongs to
 *  Note: this function only works if it is called either
 *   - when a new vehicle is build, but before it's counted in num_engines
 *   - when a vehicle is deleted and after it's subtracted from num_engines
 *   - when not changing the count (used when changing replace orders)
 */
void InvalidateAutoreplaceWindow(EngineID e, GroupID id_g)
{
	if (GetGroupNumEngines(_local_company, id_g, e) == 0 || GetGroupNumEngines(_local_company, ALL_GROUP, e) == 0) {
		/* We don't have any of this engine type.
		 * Either we just sold the last one, we build a new one or we stopped replacing it.
		 * In all cases, we need to update the left list */
		InvalidateWindowData(WC_REPLACE_VEHICLE, Engine::Get(e)->type, 1);
	}
}

/**
 * When an engine is made buildable or is removed from being buildable, add/remove it from the build/autoreplace lists
 * @param type The type of engine
 */
void AddRemoveEngineFromAutoreplaceAndBuildWindows(VehicleType type)
{
	InvalidateWindowData(WC_REPLACE_VEHICLE, type, 0); // Update the autoreplace window
	InvalidateWindowClassesData(WC_BUILD_VEHICLE); // The build windows needs updating as well
}

static const StringID _start_replace_dropdown[] = {
	STR_REPLACE_VEHICLES_NOW,
	STR_REPLACE_VEHICLES_WHEN_OLD,
	INVALID_STRING_ID
};

/**
 * Window for the autoreplacing of vehicles.
 */
class ReplaceVehicleWindow : public Window {
	EngineID sel_engine[2];       ///< Selected engine left and right.
	GUIEngineList engines[2];     ///< Left and right list of engines.
	bool replace_engines;         ///< If \c true, engines are replaced, if \c false, wagons are replaced (only for trains).
	bool reset_sel_engine;        ///< Also reset #sel_engine while updating left and/or right and no valid engine selected.
	GroupID sel_group;            ///< Group selected to replace.
	int details_height;           ///< Minimal needed height of the details panels (found so far).
	byte sort_criteria;           ///< Criteria of sorting vehicles.
	bool descending_sort_order;   ///< Order of sorting vehicles.
	bool show_hidden_engines;     ///< Whether to show the hidden engines.
	RailType sel_railtype;        ///< Type of rail tracks selected. #INVALID_RAILTYPE to show all.
	Scrollbar *vscroll[2];

	/**
	 * Figure out if an engine should be added to a list.
	 * @param e            The EngineID.
	 * @param draw_left    If \c true, the left list is drawn (the engines specific to the railtype you selected).
	 * @param show_engines If \c true, the locomotives are drawn, else the wagons are drawn (never both).
	 * @return \c true if the engine should be in the list (based on this check), else \c false.
	 */
	bool GenerateReplaceRailList(EngineID e, bool draw_left, bool show_engines)
	{
		const RailVehicleInfo *rvi = RailVehInfo(e);

		/* Ensure that the wagon/engine selection fits the engine. */
		if ((rvi->railveh_type == RAILVEH_WAGON) == show_engines) return false;

		if (draw_left && this->sel_railtype != INVALID_RAILTYPE) {
			/* Ensure that the railtype is specific to the selected one */
			if (rvi->railtype != this->sel_railtype) return false;
		}
		return true;
	}


	/**
	 * Generate an engines list
	 * @param draw_left true if generating the left list, otherwise false
	 */
	void GenerateReplaceVehList(bool draw_left)
	{
		EngineID selected_engine = INVALID_ENGINE;
		VehicleType type = (VehicleType)this->window_number;
		byte side = draw_left ? 0 : 1;

		GUIEngineList *list = &this->engines[side];
		list->Clear();

		const Engine *e;
		FOR_ALL_ENGINES_OF_TYPE(e, type) {
			if (!draw_left && !this->show_hidden_engines && e->IsHidden(_local_company)) continue;
			EngineID eid = e->index;
			if (type == VEH_TRAIN && !this->GenerateReplaceRailList(eid, draw_left, this->replace_engines)) continue; // special rules for trains

			if (draw_left) {
				const uint num_engines = GetGroupNumEngines(_local_company, this->sel_group, eid);

				/* Skip drawing the engines we don't have any of and haven't set for replacement */
				if (num_engines == 0 && EngineReplacementForCompany(Company::Get(_local_company), eid, this->sel_group) == INVALID_ENGINE) continue;
			} else {
				if (!CheckAutoreplaceValidity(this->sel_engine[0], eid, _local_company)) continue;
			}

			*list->Append() = eid;
			if (eid == this->sel_engine[side]) selected_engine = eid; // The selected engine is still in the list
		}
		this->sel_engine[side] = selected_engine; // update which engine we selected (the same or none, if it's not in the list anymore)
		if (draw_left) {
			EngList_Sort(list, &EngineNumberSorter);
		} else {
			_engine_sort_direction = this->descending_sort_order;
			EngList_Sort(list, _engine_sort_functions[this->window_number][this->sort_criteria]);
		}
	}

	/** Generate the lists */
	void GenerateLists()
	{
		EngineID e = this->sel_engine[0];

		if (this->engines[0].NeedRebuild()) {
			/* We need to rebuild the left engines list */
			this->GenerateReplaceVehList(true);
			this->vscroll[0]->SetCount(this->engines[0].Length());
			if (this->reset_sel_engine && this->sel_engine[0] == INVALID_ENGINE && this->engines[0].Length() != 0) {
				this->sel_engine[0] = this->engines[0][0];
			}
		}

		if (this->engines[1].NeedRebuild() || e != this->sel_engine[0]) {
			/* Either we got a request to rebuild the right engines list, or the left engines list selected a different engine */
			if (this->sel_engine[0] == INVALID_ENGINE) {
				/* Always empty the right engines list when nothing is selected in the left engines list */
				this->engines[1].Clear();
				this->sel_engine[1] = INVALID_ENGINE;
			} else {
				if (this->reset_sel_engine && this->sel_engine[0] != INVALID_ENGINE) {
					/* Select the current replacement for sel_engine[0]. */
					const Company *c = Company::Get(_local_company);
					this->sel_engine[1] = EngineReplacementForCompany(c, this->sel_engine[0], this->sel_group);
				}
				/* Regenerate the list on the right. Note: This resets sel_engine[1] to INVALID_ENGINE, if it is no longer available. */
				this->GenerateReplaceVehList(false);
				this->vscroll[1]->SetCount(this->engines[1].Length());
				if (this->reset_sel_engine && this->sel_engine[1] != INVALID_ENGINE) {
					int position = 0;
					for (EngineID *it = this->engines[1].Begin(); it != this->engines[1].End(); ++it) {
						if (*it == this->sel_engine[1]) break;
						++position;
					}
					this->vscroll[1]->ScrollTowards(position);
				}
			}
		}
		/* Reset the flags about needed updates */
		this->engines[0].RebuildDone();
		this->engines[1].RebuildDone();
		this->reset_sel_engine = false;
	}

	/**
	 * Handle click on the start replace button.
	 * @param replace_when_old Replace now or only when old?
	 */
	void ReplaceClick_StartReplace(bool replace_when_old)
	{
		EngineID veh_from = this->sel_engine[0];
		EngineID veh_to = this->sel_engine[1];
		DoCommandP(0, (replace_when_old ? 1 : 0) | (this->sel_group << 16), veh_from + (veh_to << 16), CMD_SET_AUTOREPLACE);
	}

public:
	ReplaceVehicleWindow(WindowDesc *desc, VehicleType vehicletype, GroupID id_g) : Window(desc)
	{
		this->sel_railtype = INVALID_RAILTYPE;
		this->replace_engines  = true; // start with locomotives (all other vehicles will not read this bool)
		this->engines[0].ForceRebuild();
		this->engines[1].ForceRebuild();
		this->reset_sel_engine = true;
		this->details_height   = ((vehicletype == VEH_TRAIN) ? 10 : 9) * FONT_HEIGHT_NORMAL + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
		this->sel_engine[0] = INVALID_ENGINE;
		this->sel_engine[1] = INVALID_ENGINE;
		this->show_hidden_engines = _engine_sort_show_hidden_engines[vehicletype];

		this->CreateNestedTree();
		this->vscroll[0] = this->GetScrollbar(WID_RV_LEFT_SCROLLBAR);
		this->vscroll[1] = this->GetScrollbar(WID_RV_RIGHT_SCROLLBAR);

		NWidgetCore *widget = this->GetWidget<NWidgetCore>(WID_RV_SHOW_HIDDEN_ENGINES);
		widget->widget_data = STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN + vehicletype;
		widget->tool_tip    = STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN_TOOLTIP + vehicletype;
		widget->SetLowered(this->show_hidden_engines);
		this->FinishInitNested(vehicletype);

		this->sort_criteria = _engine_sort_last_criteria[vehicletype];
		this->descending_sort_order = _engine_sort_last_order[vehicletype];
		this->owner = _local_company;
		this->sel_group = id_g;
	}

	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
	{
		switch (widget) {
			case WID_RV_SORT_ASCENDING_DESCENDING: {
				Dimension d = GetStringBoundingBox(this->GetWidget<NWidgetCore>(widget)->widget_data);
				d.width += padding.width + Window::SortButtonWidth() * 2; // Doubled since the string is centred and it also looks better.
				d.height += padding.height;
				*size = maxdim(*size, d);
				break;
			}

			case WID_RV_LEFT_MATRIX:
			case WID_RV_RIGHT_MATRIX:
				resize->height = GetEngineListHeight((VehicleType)this->window_number);
				size->height = (this->window_number <= VEH_ROAD ? 8 : 4) * resize->height;
				break;

			case WID_RV_LEFT_DETAILS:
			case WID_RV_RIGHT_DETAILS:
				size->height = this->details_height;
				break;

			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: {
				StringID str = this->GetWidget<NWidgetCore>(widget)->widget_data;
				SetDParam(0, STR_CONFIG_SETTING_ON);
				Dimension d = GetStringBoundingBox(str);
				SetDParam(0, STR_CONFIG_SETTING_OFF);
				d = maxdim(d, GetStringBoundingBox(str));
				d.width += padding.width;
				d.height += padding.height;
				*size = maxdim(*size, d);
				break;
			}

			case WID_RV_TRAIN_ENGINEWAGON_DROPDOWN: {
				Dimension d = GetStringBoundingBox(STR_REPLACE_ENGINES);
				d = maxdim(d, GetStringBoundingBox(STR_REPLACE_WAGONS));
				d.width += padding.width;
				d.height += padding.height;
				*size = maxdim(*size, d);
				break;
			}

			case WID_RV_INFO_TAB: {
				Dimension d = GetStringBoundingBox(STR_REPLACE_NOT_REPLACING);
				d = maxdim(d, GetStringBoundingBox(STR_REPLACE_NOT_REPLACING_VEHICLE_SELECTED));
				d.width += WD_FRAMETEXT_LEFT +  WD_FRAMETEXT_RIGHT;
				d.height += WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM;
				*size = maxdim(*size, d);
				break;
			}

			case WID_RV_TRAIN_RAILTYPE_DROPDOWN: {
				Dimension d = {0, 0};
				for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
					const RailtypeInfo *rti = GetRailTypeInfo(rt);
					/* Skip rail type if it has no label */
					if (rti->label == 0) continue;
					d = maxdim(d, GetStringBoundingBox(rti->strings.replace_text));
				}
				d.width += padding.width;
				d.height += padding.height;
				*size = maxdim(*size, d);
				break;
			}

			case WID_RV_START_REPLACE: {
				Dimension d = GetStringBoundingBox(STR_REPLACE_VEHICLES_START);
				for (int i = 0; _start_replace_dropdown[i] != INVALID_STRING_ID; i++) {
					d = maxdim(d, GetStringBoundingBox(_start_replace_dropdown[i]));
				}
				d.width += padding.width;
				d.height += padding.height;
				*size = maxdim(*size, d);
				break;
			}
		}
	}

	void SetStringParameters(int widget) const override
	{
		switch (widget) {
			case WID_RV_CAPTION:
				SetDParam(0, STR_REPLACE_VEHICLE_TRAIN + this->window_number);
				switch (this->sel_group) {
					case ALL_GROUP:
						SetDParam(1, STR_GROUP_ALL_TRAINS + this->window_number);
						break;

					case DEFAULT_GROUP:
						SetDParam(1, STR_GROUP_DEFAULT_TRAINS + this->window_number);
						break;

					default:
						SetDParam(1, STR_GROUP_NAME);
						SetDParam(2, sel_group);
						break;
				}
				break;

			case WID_RV_SORT_DROPDOWN:
				SetDParam(0, _engine_sort_listing[this->window_number][this->sort_criteria]);
				break;

			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: {
				const Company *c = Company::Get(_local_company);
				SetDParam(0, c->settings.renew_keep_length ? STR_CONFIG_SETTING_ON : STR_CONFIG_SETTING_OFF);
				break;
			}

			case WID_RV_TRAIN_ENGINEWAGON_DROPDOWN:
				SetDParam(0, this->replace_engines ? STR_REPLACE_ENGINES : STR_REPLACE_WAGONS);
				break;
		}
	}

	void DrawWidget(const Rect &r, int widget) const override
	{
		switch (widget) {
			case WID_RV_SORT_ASCENDING_DESCENDING:
				this->DrawSortButtonState(WID_RV_SORT_ASCENDING_DESCENDING, this->descending_sort_order ? SBS_DOWN : SBS_UP);
				break;

			case WID_RV_INFO_TAB: {
				const Company *c = Company::Get(_local_company);
				StringID str;
				if (this->sel_engine[0] != INVALID_ENGINE) {
					if (!EngineHasReplacementForCompany(c, this->sel_engine[0], this->sel_group)) {
						str = STR_REPLACE_NOT_REPLACING;
					} else {
						bool when_old = false;
						EngineID e = EngineReplacementForCompany(c, this->sel_engine[0], this->sel_group, &when_old);
						str = when_old ? STR_REPLACE_REPLACING_WHEN_OLD : STR_ENGINE_NAME;
						SetDParam(0, e);
					}
				} else {
					str = STR_REPLACE_NOT_REPLACING_VEHICLE_SELECTED;
				}

				DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMERECT_TOP, str, TC_BLACK, SA_HOR_CENTER);
				break;
			}

			case WID_RV_LEFT_MATRIX:
			case WID_RV_RIGHT_MATRIX: {
				int side = (widget == WID_RV_LEFT_MATRIX) ? 0 : 1;
				EngineID start  = this->vscroll[side]->GetPosition(); // what is the offset for the start (scrolling)
				EngineID end    = min(this->vscroll[side]->GetCapacity() + start, this->engines[side].Length());

				/* Do the actual drawing */
				DrawEngineList((VehicleType)this->window_number, r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, r.top + WD_FRAMERECT_TOP,
						&this->engines[side], start, end, this->sel_engine[side], side == 0, this->sel_group);
				break;
			}
		}
	}

	void OnPaint() override
	{
		if (this->engines[0].NeedRebuild() || this->engines[1].NeedRebuild()) this->GenerateLists();

		Company *c = Company::Get(_local_company);

		/* Disable the "Start Replacing" button if:
		 *    Either engines list is empty
		 * or The selected replacement engine has a replacement (to prevent loops). */
		this->SetWidgetDisabledState(WID_RV_START_REPLACE,
				this->sel_engine[0] == INVALID_ENGINE || this->sel_engine[1] == INVALID_ENGINE || EngineReplacementForCompany(c, this->sel_engine[1], this->sel_group) != INVALID_ENGINE);

		/* Disable the "Stop Replacing" button if:
		 *   The left engines list (existing vehicle) is empty
		 *   or The selected vehicle has no replacement set up */
		this->SetWidgetDisabledState(WID_RV_STOP_REPLACE, this->sel_engine[0] == INVALID_ENGINE || !EngineHasReplacementForCompany(c, this->sel_engine[0], this->sel_group));

		if (this->window_number == VEH_TRAIN) {
			/* Show the selected railtype in the pulldown menu */
			this->GetWidget<NWidgetCore>(WID_RV_TRAIN_RAILTYPE_DROPDOWN)->widget_data = sel_railtype == INVALID_RAILTYPE ? STR_REPLACE_ALL_RAILTYPE : GetRailTypeInfo(sel_railtype)->strings.replace_text;
		}

		this->DrawWidgets();

		if (!this->IsShaded()) {
			int needed_height = this->details_height;
			/* Draw details panels. */
			for (int side = 0; side < 2; side++) {
				if (this->sel_engine[side] != INVALID_ENGINE) {
					/* Use default engine details without refitting */
					const Engine *e = Engine::Get(this->sel_engine[side]);
					TestedEngineDetails ted;
					ted.cost = 0;
					ted.cargo = e->GetDefaultCargoType();
					ted.capacity = e->GetDisplayDefaultCapacity(&ted.mail_capacity);

					NWidgetBase *nwi = this->GetWidget<NWidgetBase>(side == 0 ? WID_RV_LEFT_DETAILS : WID_RV_RIGHT_DETAILS);
					int text_end = DrawVehiclePurchaseInfo(nwi->pos_x + WD_FRAMETEXT_LEFT, nwi->pos_x + nwi->current_x - WD_FRAMETEXT_RIGHT,
							nwi->pos_y + WD_FRAMERECT_TOP, this->sel_engine[side], ted);
					needed_height = max(needed_height, text_end - (int)nwi->pos_y + WD_FRAMERECT_BOTTOM);
				}
			}
			if (needed_height != this->details_height) { // Details window are not high enough, enlarge them.
				this->details_height = needed_height;
				this->ReInit();
				return;
			}
		}
	}

	void OnClick(Point pt, int widget, int click_count) override
	{
		switch (widget) {
			case WID_RV_SORT_ASCENDING_DESCENDING:
				this->descending_sort_order ^= true;
				_engine_sort_last_order[this->window_number] = this->descending_sort_order;
				this->engines[1].ForceRebuild();
				this->SetDirty();
				break;

			case WID_RV_SHOW_HIDDEN_ENGINES:
				this->show_hidden_engines ^= true;
				_engine_sort_show_hidden_engines[this->window_number] = this->show_hidden_engines;
				this->engines[1].ForceRebuild();
				this->SetWidgetLoweredState(widget, this->show_hidden_engines);
				this->SetDirty();
				break;

			case WID_RV_SORT_DROPDOWN:
				DisplayVehicleSortDropDown(this, static_cast<VehicleType>(this->window_number), this->sort_criteria, WID_RV_SORT_DROPDOWN);
				break;

			case WID_RV_TRAIN_ENGINEWAGON_DROPDOWN: {
				DropDownList *list = new DropDownList();
				*list->Append() = new DropDownListStringItem(STR_REPLACE_ENGINES, 1, false);
				*list->Append() = new DropDownListStringItem(STR_REPLACE_WAGONS, 0, false);
				ShowDropDownList(this, list, this->replace_engines ? 1 : 0, WID_RV_TRAIN_ENGINEWAGON_DROPDOWN);
				break;
			}

			case WID_RV_TRAIN_RAILTYPE_DROPDOWN: // Railtype selection dropdown menu
				ShowDropDownList(this, GetRailTypeDropDownList(true, true), sel_railtype, WID_RV_TRAIN_RAILTYPE_DROPDOWN);
				break;

			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: // toggle renew_keep_length
				DoCommandP(0, GetCompanySettingIndex("company.renew_keep_length"), Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, CMD_CHANGE_COMPANY_SETTING);
				break;

			case WID_RV_START_REPLACE: { // Start replacing
				if (this->GetWidget<NWidgetLeaf>(widget)->ButtonHit(pt)) {
					this->HandleButtonClick(WID_RV_START_REPLACE);
					ReplaceClick_StartReplace(false);
				} else {
					bool replacment_when_old = EngineHasReplacementWhenOldForCompany(Company::Get(_local_company), this->sel_engine[0], this->sel_group);
					ShowDropDownMenu(this, _start_replace_dropdown, replacment_when_old ? 1 : 0, WID_RV_START_REPLACE, !this->replace_engines ? 1 << 1 : 0, 0);
				}
				break;
			}

			case WID_RV_STOP_REPLACE: { // Stop replacing
				EngineID veh_from = this->sel_engine[0];
				DoCommandP(0, this->sel_group << 16, veh_from + (INVALID_ENGINE << 16), CMD_SET_AUTOREPLACE);
				break;
			}

			case WID_RV_LEFT_MATRIX:
			case WID_RV_RIGHT_MATRIX: {
				byte click_side;
				if (widget == WID_RV_LEFT_MATRIX) {
					click_side = 0;
				} else {
					click_side = 1;
				}
				uint i = this->vscroll[click_side]->GetScrolledRowFromWidget(pt.y, this, widget);
				size_t engine_count = this->engines[click_side].Length();

				EngineID e = engine_count > i ? this->engines[click_side][i] : INVALID_ENGINE;
				if (e == this->sel_engine[click_side]) break; // we clicked the one we already selected
				this->sel_engine[click_side] = e;
				if (click_side == 0) {
					this->engines[1].ForceRebuild();
					this->reset_sel_engine = true;
				}
				this->SetDirty();
				break;
			}
		}
	}

	void OnDropdownSelect(int widget, int index) override
	{
		switch (widget) {
			case WID_RV_SORT_DROPDOWN:
				if (this->sort_criteria != index) {
					this->sort_criteria = index;
					_engine_sort_last_criteria[this->window_number] = this->sort_criteria;
					this->engines[1].ForceRebuild();
					this->SetDirty();
				}
				break;

			case WID_RV_TRAIN_RAILTYPE_DROPDOWN: {
				RailType temp = (RailType)index;
				if (temp == sel_railtype) return; // we didn't select a new one. No need to change anything
				sel_railtype = temp;
				/* Reset scrollbar positions */
				this->vscroll[0]->SetPosition(0);
				this->vscroll[1]->SetPosition(0);
				/* Rebuild the lists */
				this->engines[0].ForceRebuild();
				this->engines[1].ForceRebuild();
				this->reset_sel_engine = true;
				this->SetDirty();
				break;
			}

			case WID_RV_TRAIN_ENGINEWAGON_DROPDOWN: {
				this->replace_engines = index != 0;
				this->engines[0].ForceRebuild();
				this->reset_sel_engine = true;
				this->SetDirty();
				break;
			}

			case WID_RV_START_REPLACE:
				this->ReplaceClick_StartReplace(index != 0);
				break;
		}
	}

	void OnResize() override
	{
		this->vscroll[0]->SetCapacityFromWidget(this, WID_RV_LEFT_MATRIX);
		this->vscroll[1]->SetCapacityFromWidget(this, WID_RV_RIGHT_MATRIX);
	}

	/**
	 * Some data on this window has become invalid.
	 * @param data Information about the changed data.
	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
	 */
	void OnInvalidateData(int data = 0, bool gui_scope = true) override
	{
		if (data != 0) {
			/* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
			this->engines[0].ForceRebuild();
		} else {
			this->engines[1].ForceRebuild();
		}
	}
};

static const NWidgetPart _nested_replace_rail_vehicle_widgets[] = {
	NWidget(NWID_HORIZONTAL),
		NWidget(WWT_CLOSEBOX, COLOUR_GREY),
		NWidget(WWT_CAPTION, COLOUR_GREY, WID_RV_CAPTION), SetDataTip(STR_REPLACE_VEHICLES_WHITE, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
		NWidget(WWT_SHADEBOX, COLOUR_GREY),
		NWidget(WWT_DEFSIZEBOX, COLOUR_GREY),
		NWidget(WWT_STICKYBOX, COLOUR_GREY),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_PANEL, COLOUR_GREY),
			NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_REPLACE_VEHICLE_VEHICLES_IN_USE, STR_REPLACE_VEHICLE_VEHICLES_IN_USE_TOOLTIP), SetFill(1, 1), SetMinimalSize(0, 12), SetResize(1, 0),
		EndContainer(),
		NWidget(WWT_PANEL, COLOUR_GREY),
			NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_REPLACE_VEHICLE_AVAILABLE_VEHICLES, STR_REPLACE_VEHICLE_AVAILABLE_VEHICLES_TOOLTIP), SetFill(1, 1), SetMinimalSize(0, 12), SetResize(1, 0),
		EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(NWID_VERTICAL),
			NWidget(NWID_HORIZONTAL),
				NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_RV_TRAIN_RAILTYPE_DROPDOWN), SetMinimalSize(136, 12), SetDataTip(0x0, STR_REPLACE_HELP_RAILTYPE), SetFill(1, 0), SetResize(1, 0),
				NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_RV_TRAIN_ENGINEWAGON_DROPDOWN), SetDataTip(STR_BLACK_STRING, STR_REPLACE_ENGINE_WAGON_SELECT_HELP),
			EndContainer(),
			NWidget(WWT_PANEL, COLOUR_GREY), SetResize(1, 0), EndContainer(),
		EndContainer(),
		NWidget(NWID_VERTICAL),
			NWidget(NWID_HORIZONTAL),
				NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_RV_SORT_ASCENDING_DESCENDING), SetDataTip(STR_BUTTON_SORT_BY, STR_TOOLTIP_SORT_ORDER), SetFill(1, 1),
				NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_RV_SORT_DROPDOWN), SetResize(1, 0), SetFill(1, 1), SetDataTip(STR_JUST_STRING, STR_TOOLTIP_SORT_CRITERIA),
			EndContainer(),
			NWidget(NWID_HORIZONTAL),
				NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_RV_SHOW_HIDDEN_ENGINES), SetDataTip(STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN, STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN_TOOLTIP),
				NWidget(WWT_PANEL, COLOUR_GREY), SetResize(1, 0), SetFill(1, 1), EndContainer(),
			EndContainer(),
		EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_MATRIX, COLOUR_GREY, WID_RV_LEFT_MATRIX), SetMinimalSize(216, 0), SetFill(1, 1), SetMatrixDataTip(1, 0, STR_REPLACE_HELP_LEFT_ARRAY), SetResize(1, 1), SetScrollbar(WID_RV_LEFT_SCROLLBAR),
		NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_RV_LEFT_SCROLLBAR),
		NWidget(WWT_MATRIX, COLOUR_GREY, WID_RV_RIGHT_MATRIX), SetMinimalSize(216, 0), SetFill(1, 1), SetMatrixDataTip(1, 0, STR_REPLACE_HELP_RIGHT_ARRAY), SetResize(1, 1), SetScrollbar(WID_RV_RIGHT_SCROLLBAR),
		NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_RV_RIGHT_SCROLLBAR),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_LEFT_DETAILS), SetMinimalSize(240, 122), SetResize(1, 0), EndContainer(),
		NWidget(NWID_VERTICAL),
			NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_RIGHT_DETAILS), SetMinimalSize(240, 122), SetResize(1, 0), EndContainer(),
			NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_RV_TRAIN_WAGONREMOVE_TOGGLE), SetMinimalSize(138, 12), SetDataTip(STR_REPLACE_REMOVE_WAGON, STR_REPLACE_REMOVE_WAGON_HELP), SetFill(1, 0), SetResize(1, 0),
		EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL),
		NWidget(NWID_PUSHBUTTON_DROPDOWN, COLOUR_GREY, WID_RV_START_REPLACE), SetMinimalSize(139, 12), SetDataTip(STR_REPLACE_VEHICLES_START, STR_REPLACE_HELP_START_BUTTON),
		NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_INFO_TAB), SetMinimalSize(167, 12), SetDataTip(0x0, STR_REPLACE_HELP_REPLACE_INFO_TAB), SetResize(1, 0),
		EndContainer(),
		NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_RV_STOP_REPLACE), SetMinimalSize(150, 12), SetDataTip(STR_REPLACE_VEHICLES_STOP, STR_REPLACE_HELP_STOP_BUTTON),
		NWidget(WWT_RESIZEBOX, COLOUR_GREY),
	EndContainer(),
};

static WindowDesc _replace_rail_vehicle_desc(
	WDP_AUTO, "replace_vehicle_train", 500, 140,
	WC_REPLACE_VEHICLE, WC_NONE,
	WDF_CONSTRUCTION,
	_nested_replace_rail_vehicle_widgets, lengthof(_nested_replace_rail_vehicle_widgets)
);

static const NWidgetPart _nested_replace_vehicle_widgets[] = {
	NWidget(NWID_HORIZONTAL),
		NWidget(WWT_CLOSEBOX, COLOUR_GREY),
		NWidget(WWT_CAPTION, COLOUR_GREY, WID_RV_CAPTION), SetMinimalSize(433, 14), SetDataTip(STR_REPLACE_VEHICLES_WHITE, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
		NWidget(WWT_SHADEBOX, COLOUR_GREY),
		NWidget(WWT_DEFSIZEBOX, COLOUR_GREY),
		NWidget(WWT_STICKYBOX, COLOUR_GREY),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_PANEL, COLOUR_GREY),
			NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_REPLACE_VEHICLE_VEHICLES_IN_USE, STR_REPLACE_VEHICLE_VEHICLES_IN_USE_TOOLTIP), SetFill(1, 1), SetMinimalSize(0, 12), SetResize(1, 0),
		EndContainer(),
		NWidget(WWT_PANEL, COLOUR_GREY),
			NWidget(WWT_LABEL, COLOUR_GREY), SetDataTip(STR_REPLACE_VEHICLE_AVAILABLE_VEHICLES, STR_REPLACE_VEHICLE_AVAILABLE_VEHICLES_TOOLTIP), SetFill(1, 1), SetMinimalSize(0, 12), SetResize(1, 0),
		EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_PANEL, COLOUR_GREY), SetResize(1, 0), EndContainer(),
		NWidget(NWID_VERTICAL),
			NWidget(NWID_HORIZONTAL),
				NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_RV_SORT_ASCENDING_DESCENDING), SetDataTip(STR_BUTTON_SORT_BY, STR_TOOLTIP_SORT_ORDER),
				NWidget(WWT_DROPDOWN, COLOUR_GREY, WID_RV_SORT_DROPDOWN), SetResize(1, 0), SetFill(1, 1), SetDataTip(STR_JUST_STRING, STR_TOOLTIP_SORT_CRITERIA),
			EndContainer(),
			NWidget(NWID_HORIZONTAL),
				NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_RV_SHOW_HIDDEN_ENGINES), SetDataTip(STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN, STR_SHOW_HIDDEN_ENGINES_VEHICLE_TRAIN_TOOLTIP),
				NWidget(WWT_PANEL, COLOUR_GREY), SetResize(1, 0), SetFill(1, 1), EndContainer(),
			EndContainer(),
		EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_MATRIX, COLOUR_GREY, WID_RV_LEFT_MATRIX), SetMinimalSize(216, 0), SetFill(1, 1), SetMatrixDataTip(1, 0, STR_REPLACE_HELP_LEFT_ARRAY), SetResize(1, 1), SetScrollbar(WID_RV_LEFT_SCROLLBAR),
		NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_RV_LEFT_SCROLLBAR),
		NWidget(WWT_MATRIX, COLOUR_GREY, WID_RV_RIGHT_MATRIX), SetMinimalSize(216, 0), SetFill(1, 1), SetMatrixDataTip(1, 0, STR_REPLACE_HELP_RIGHT_ARRAY), SetResize(1, 1), SetScrollbar(WID_RV_RIGHT_SCROLLBAR),
		NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_RV_RIGHT_SCROLLBAR),
	EndContainer(),
	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
		NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_LEFT_DETAILS), SetMinimalSize(228, 92), SetResize(1, 0), EndContainer(),
		NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_RIGHT_DETAILS), SetMinimalSize(228, 92), SetResize(1, 0), EndContainer(),
	EndContainer(),
	NWidget(NWID_HORIZONTAL),
		NWidget(NWID_PUSHBUTTON_DROPDOWN, COLOUR_GREY, WID_RV_START_REPLACE), SetMinimalSize(139, 12), SetDataTip(STR_REPLACE_VEHICLES_START, STR_REPLACE_HELP_START_BUTTON),
		NWidget(WWT_PANEL, COLOUR_GREY, WID_RV_INFO_TAB), SetMinimalSize(167, 12), SetDataTip(0x0, STR_REPLACE_HELP_REPLACE_INFO_TAB), SetResize(1, 0), EndContainer(),
		NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_RV_STOP_REPLACE), SetMinimalSize(138, 12), SetDataTip(STR_REPLACE_VEHICLES_STOP, STR_REPLACE_HELP_STOP_BUTTON),
		NWidget(WWT_RESIZEBOX, COLOUR_GREY),
	EndContainer(),
};

static WindowDesc _replace_vehicle_desc(
	WDP_AUTO, "replace_vehicle", 456, 118,
	WC_REPLACE_VEHICLE, WC_NONE,
	WDF_CONSTRUCTION,
	_nested_replace_vehicle_widgets, lengthof(_nested_replace_vehicle_widgets)
);

/**
 * Show the autoreplace configuration window for a particular group.
 * @param id_g The group to replace the vehicles for.
 * @param vehicletype The type of vehicles in the group.
 */
void ShowReplaceGroupVehicleWindow(GroupID id_g, VehicleType vehicletype)
{
	DeleteWindowById(WC_REPLACE_VEHICLE, vehicletype);
	new ReplaceVehicleWindow(vehicletype == VEH_TRAIN ? &_replace_rail_vehicle_desc : &_replace_vehicle_desc, vehicletype, id_g);
}