}

	}

	return i;

}

static inline bool RoadVehiclesAreBuilt()

{

	const Vehicle* v;

	FOR_ALL_VEHICLES(v) {

		if (v->type == VEH_ROAD) return true;

	}

	return false;

}

enum GameOptionsWidgets {

	GAMEOPT_CURRENCY_TXT    =  4,

	GAMEOPT_CURRENCY_BTN,

	GAMEOPT_DISTANCE_TXT    =  7,

	GAMEOPT_DISTANCE_BTN,

	GAMEOPT_ROADSIDE_TXT    = 10,

	GAMEOPT_ROADSIDE_BTN,

	GAMEOPT_TOWNNAME_TXT    = 13,

	GAMEOPT_TOWNNAME_BTN,

	GAMEOPT_AUTOSAVE_TXT    = 16,

	GAMEOPT_AUTOSAVE_BTN,

	GAMEOPT_VEHICLENAME_TXT = 19,

	GAMEOPT_VEHICLENAME_BTN,

	GAMEOPT_VEHICLENAME_SAVE,

	GAMEOPT_LANG_TXT        = 23,

	GAMEOPT_LANG_BTN,

	GAMEOPT_RESOLUTION_TXT  = 26,

	GAMEOPT_RESOLUTION_BTN,

	GAMEOPT_FULLSCREEN,

	GAMEOPT_SCREENSHOT_TXT  = 30,

	GAMEOPT_SCREENSHOT_BTN,

};

static void ShowCustCurrency();

static void GameOptionsWndProc(Window *w, WindowEvent *e)

{

	switch (e->event) {

		case WE_PAINT: {

			int i;

			StringID str = STR_02BE_DEFAULT;

			SetDParam(0, str);

			SetDParam(1, _currency_specs[_opt_ptr->currency].name);

			SetDParam(2, STR_UNITS_IMPERIAL + _opt_ptr->units);

			SetDParam(3, STR_02E9_DRIVE_ON_LEFT + _opt_ptr->road_side);

			SetDParam(4, TownName(_opt_ptr->town_name));

			SetDParam(5, _autosave_dropdown[_opt_ptr->autosave]);

			SetDParam(6, SPECSTR_LANGUAGE_START + _dynlang.curr);

			i = GetCurRes();

			SetDParam(7, i == _num_resolutions ? STR_RES_OTHER : SPECSTR_RESOLUTION_START + i);

			SetDParam(8, SPECSTR_SCREENSHOT_START + _cur_screenshot_format);

			w->SetWidgetLoweredState(GAMEOPT_FULLSCREEN, _fullscreen);

			DrawWindowWidgets(w);

			DrawString(20, 175, STR_OPTIONS_FULLSCREEN, TC_FROMSTRING); // fullscreen

		} break;

		case WE_CLICK:

			switch (e->we.click.widget) {

				case GAMEOPT_CURRENCY_TXT: case GAMEOPT_CURRENCY_BTN: /* Setup currencies dropdown */

					ShowDropDownMenu(w, BuildCurrencyDropdown(), _opt_ptr->currency, GAMEOPT_CURRENCY_BTN, _game_mode == GM_MENU ? 0 : ~GetMaskOfAllowedCurrencies(), 0);

					break;

				case GAMEOPT_DISTANCE_TXT: case GAMEOPT_DISTANCE_BTN: /* Setup distance unit dropdown */

					ShowDropDownMenu(w, _units_dropdown, _opt_ptr->units, GAMEOPT_DISTANCE_BTN, 0, 0);

					break;

				case GAMEOPT_ROADSIDE_TXT: case GAMEOPT_ROADSIDE_BTN: { /* Setup road-side dropdown */

					int i = 0;

					/* You can only change the drive side if you are in the menu or ingame with

					 * no vehicles present. In a networking game only the server can change it */

					if ((_game_mode != GM_MENU && RoadVehiclesAreBuilt()) || (_networking && !_network_server))

						i = (-1) ^ (1 << _opt_ptr->road_side); // disable the other value

					ShowDropDownMenu(w, _driveside_dropdown, _opt_ptr->road_side, GAMEOPT_ROADSIDE_BTN, i, 0);

				} break;

				case GAMEOPT_TOWNNAME_TXT: case GAMEOPT_TOWNNAME_BTN: { /* Setup townname dropdown */

					uint sel = 0;

					for (uint i = 0; _town_names[i] != INVALID_STRING_ID; i++) {

						if (_town_names[i] == TownName(_opt_ptr->town_name)) {

							sel = i;

							break;

						}

					}

					ShowDropDownMenu(w, _town_names, sel, GAMEOPT_TOWNNAME_BTN, (_game_mode == GM_MENU) ? 0 : (-1) ^ (1 << sel), 0);

				} break;