C++ SetDParam函数代码示例

void CcGiveMoney(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2)
{
	if (result.Failed() || !_settings_game.economy.give_money) return;

	/* Inform the company of the action of one of its clients (controllers). */
	char msg[64];
	SetDParam(0, p2);
	GetString(msg, STR_COMPANY_NAME, lastof(msg));

	if (!_network_server) {
		NetworkClientSendChat(NETWORK_ACTION_GIVE_MONEY, DESTTYPE_TEAM, p2, msg, p1);
	} else {
		NetworkServerSendChat(NETWORK_ACTION_GIVE_MONEY, DESTTYPE_TEAM, p2, msg, CLIENT_ID_SERVER, p1);
	}
}

	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
	{
		Dimension d;
		switch (widget) {
			/* Left and right should have same sizing. */
			case WID_S_LEFT:
			case WID_S_RIGHT: {
				SetDParamMaxValue(0, MAX_YEAR * DAYS_IN_YEAR);
				d = GetStringBoundingBox(STR_WHITE_DATE_LONG);

				int64 max_money = UINT32_MAX;
				const Company *c;
				FOR_ALL_COMPANIES(c) max_money = max<int64>(c->money, max_money);
				SetDParam(0, 100LL * max_money);
				d = maxdim(d, GetStringBoundingBox(STR_COMPANY_MONEY));
				break;
			}

			case WID_S_MIDDLE:
				d = GetStringBoundingBox(STR_STATUSBAR_AUTOSAVE);
				d = maxdim(d,    GetStringBoundingBox(STR_STATUSBAR_PAUSED));

				if (Company::IsValidID(_local_company)) {
					SetDParam(0, _local_company);
					d = maxdim(d, GetStringBoundingBox(STR_STATUSBAR_COMPANY_NAME));
				}
				break;

			default:
				return;
		}

		d.width += padding.width;
		d.height += padding.height;
		*size = maxdim(d, *size);
	}

/* Draw rail wagon specific details */
static int DrawRailWagonPurchaseInfo(int left, int right, int y, EngineID engine_number, const RailVehicleInfo *rvi)
{
	const Engine *e = Engine::Get(engine_number);

	/* Purchase cost */
	SetDParam(0, e->GetCost());
	DrawString(left, right, y, STR_PURCHASE_INFO_COST);
	y += FONT_HEIGHT_NORMAL;

	/* Wagon weight - (including cargo) */
	uint weight = e->GetDisplayWeight();
	SetDParam(0, weight);
	uint cargo_weight = (e->CanCarryCargo() ? CargoSpec::Get(e->GetDefaultCargoType())->weight * GetTotalCapacityOfArticulatedParts(engine_number) / 16 : 0);
	SetDParam(1, cargo_weight + weight);
	DrawString(left, right, y, STR_PURCHASE_INFO_WEIGHT_CWEIGHT);
	y += FONT_HEIGHT_NORMAL;

	/* Wagon speed limit, displayed if above zero */
	if (_settings_game.vehicle.wagon_speed_limits) {
		uint max_speed = e->GetDisplayMaxSpeed();
		if (max_speed > 0) {
			SetDParam(0, max_speed);
			DrawString(left, right, y, STR_PURCHASE_INFO_SPEED);
			y += FONT_HEIGHT_NORMAL;
		}
	}

	/* Running cost */
	if (rvi->running_cost_class != INVALID_PRICE) {
		SetDParam(0, e->GetRunningCost());
		DrawString(left, right, y, STR_PURCHASE_INFO_RUNNINGCOST);
		y += FONT_HEIGHT_NORMAL;
	}

	return y;
}

	virtual void DrawWidget(const Rect &r, int widget) const
	{
		switch (widget) {
			case MTSW_LIST_LEFT: {
				GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, PC_BLACK);

				int y = r.top + WD_FRAMERECT_TOP;
				for (uint i = 0; i < NUM_SONGS_AVAILABLE; i++) {
					const char *song_name = GetSongName(i);
					if (StrEmpty(song_name)) continue;

					SetDParam(0, GetTrackNumber(i));
					SetDParam(1, 2);
					SetDParamStr(2, song_name);
					DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_PLAYLIST_TRACK_NAME);
					y += FONT_HEIGHT_SMALL;
				}
				break;
			}

			case MTSW_LIST_RIGHT: {
				GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, PC_BLACK);

				int y = r.top + WD_FRAMERECT_TOP;
				for (const byte *p = _playlists[_settings_client.music.playlist]; *p != 0; p++) {
					uint i = *p - 1;
					SetDParam(0, GetTrackNumber(i));
					SetDParam(1, 2);
					SetDParamStr(2, GetSongName(i));
					DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, STR_PLAYLIST_TRACK_NAME);
					y += FONT_HEIGHT_SMALL;
				}
				break;
			}
		}
	}

	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
	{
		if (widget == WID_MH_BACKGROUND) {
			this->line_height = FONT_HEIGHT_NORMAL + 2;
			resize->height = this->line_height;

			/* Months are off-by-one, so it's actually 8. Not using
			 * month 12 because the 1 is usually less wide. */
			SetDParam(0, ConvertYMDToDate(ORIGINAL_MAX_YEAR, 7, 30));
			this->date_width = GetStringBoundingBox(STR_SHORT_DATE).width;

			size->height = 4 * resize->height + this->top_spacing + this->bottom_spacing; // At least 4 lines are visible.
			size->width = max(200u, size->width); // At least 200 pixels wide.
		}
	}

static void ShipArrivesAt(const Vehicle *v, Station *st)
{
	/* Check if station was ever visited before */
	if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
		st->had_vehicle_of_type |= HVOT_SHIP;

		SetDParam(0, st->index);
		AddVehicleNewsItem(
			STR_NEWS_FIRST_SHIP_ARRIVAL,
			(v->owner == _local_company) ? NS_ARRIVAL_COMPANY : NS_ARRIVAL_OTHER,
			v->index,
			st->index
		);
		AI::NewEvent(v->owner, new AIEventStationFirstVehicle(st->index, v->index));
	}
}

	virtual void OnClick(Point pt, int widget, int click_count)
	{
		const NWidgetBase *wid = this->GetWidget<NWidgetBase>(CW_PANEL);
		uint btn = (pt.y - wid->pos_y - WD_FRAMERECT_TOP - this->header_height) / (FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL);
		uint x = pt.x - wid->pos_x;
		bool rtl = _current_text_dir == TD_RTL;
		if (rtl) x = wid->current_x - x;

		if (btn >= lengthof(_cheats_ui)) return;

		const CheatEntry *ce = &_cheats_ui[btn];
		int value = (int32)ReadValue(ce->variable, ce->type);
		int oldvalue = value;

		if (btn == CHT_CHANGE_DATE && x >= 40) {
			/* Click at the date text directly. */
			SetDParam(0, value);
			ShowQueryString(STR_JUST_INT, STR_CHEAT_CHANGE_DATE_QUERY_CAPT, 8, this, CS_NUMERAL, QSF_ACCEPT_UNCHANGED);
			return;
		}

		/* Not clicking a button? */
		if (!IsInsideMM(x, 20, 40)) return;

		*ce->been_used = true;

		switch (ce->type) {
			case SLE_BOOL:
				value ^= 1;
				if (ce->proc != NULL) ce->proc(value, 0);
				break;

			default:
				/* Take whatever the function returns */
				value = ce->proc(value + ((x >= 30) ? 1 : -1), (x >= 30) ? 1 : -1);

				/* The first cheat (money), doesn't return a different value. */
				if (value != oldvalue || btn == CHT_MONEY) this->clicked = btn * 2 + 1 + ((x >= 30) != rtl ? 1 : 0);
				break;
		}

		if (value != oldvalue) WriteValue(ce->variable, ce->type, (int64)value);

		this->flags4 |= WF_TIMEOUT_BEGIN;

		this->SetDirty();
	}

	virtual void DrawWidget(const Rect &r, int widget) const
	{
		switch (widget) {
			case AIL_WIDGET_LIST: {
				/* Draw a list of all available AIs. */
				int y = this->GetWidget<NWidgetBase>(AIL_WIDGET_LIST)->pos_y;
				/* First AI in the list is hardcoded to random */
				if (this->vscroll->IsVisible(0)) {
					DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_LEFT, y + WD_MATRIX_TOP, STR_AI_CONFIG_RANDOM_AI, this->selected == -1 ? TC_WHITE : TC_BLACK);
					y += this->line_height;
				}
				AIInfoList::const_iterator it = this->ai_info_list->begin();
				for (int i = 1; it != this->ai_info_list->end(); i++, it++) {
					if (this->vscroll->IsVisible(i)) {
						DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_RIGHT, y + WD_MATRIX_TOP, (*it).second->GetName(), (this->selected == i - 1) ? TC_WHITE : TC_BLACK);
						y += this->line_height;
					}
				}
				break;
			}
			case AIL_WIDGET_INFO_BG: {
				AIInfo *selected_info = NULL;
				AIInfoList::const_iterator it = this->ai_info_list->begin();
				for (int i = 1; selected_info == NULL && it != this->ai_info_list->end(); i++, it++) {
					if (this->selected == i - 1) selected_info = (*it).second;
				}
				/* Some info about the currently selected AI. */
				if (selected_info != NULL) {
					int y = r.top + WD_FRAMERECT_TOP;
					SetDParamStr(0, selected_info->GetAuthor());
					DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_AUTHOR);
					y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
					SetDParam(0, selected_info->GetVersion());
					DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_VERSION);
					y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
					if (selected_info->GetURL() != NULL) {
						SetDParamStr(0, selected_info->GetURL());
						DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_URL);
						y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
					}
					SetDParamStr(0, selected_info->GetDescription());
					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, r.bottom - WD_FRAMERECT_BOTTOM, STR_JUST_RAW_STRING, TC_BLACK);
				}
				break;
			}
		}
	}

/* Draw ship specific details */
static int DrawShipPurchaseInfo(int left, int right, int y, EngineID engine_number, bool refittable)
{
	const Engine *e = Engine::Get(engine_number);

	/* Purchase cost - Max speed */
	uint raw_speed = e->GetDisplayMaxSpeed();
	uint ocean_speed = e->u.ship.ApplyWaterClassSpeedFrac(raw_speed, true);
	uint canal_speed = e->u.ship.ApplyWaterClassSpeedFrac(raw_speed, false);

	SetDParam(0, e->GetCost());
	if (ocean_speed == canal_speed) {
		SetDParam(1, ocean_speed);
		DrawString(left, right, y, STR_PURCHASE_INFO_COST_SPEED);
		y += FONT_HEIGHT_NORMAL;
	} else {
		DrawString(left, right, y, STR_PURCHASE_INFO_COST);
		y += FONT_HEIGHT_NORMAL;

		SetDParam(0, ocean_speed);
		DrawString(left, right, y, STR_PURCHASE_INFO_SPEED_OCEAN);
		y += FONT_HEIGHT_NORMAL;

		SetDParam(0, canal_speed);
		DrawString(left, right, y, STR_PURCHASE_INFO_SPEED_CANAL);
		y += FONT_HEIGHT_NORMAL;
	}

	/* Cargo type + capacity */
	SetDParam(0, e->GetDefaultCargoType());
	SetDParam(1, e->GetDisplayDefaultCapacity());
	SetDParam(2, refittable ? STR_PURCHASE_INFO_REFITTABLE : STR_EMPTY);
	DrawString(left, right, y, STR_PURCHASE_INFO_CAPACITY);
	y += FONT_HEIGHT_NORMAL;

	/* Running cost */
	SetDParam(0, e->GetRunningCost());
	DrawString(left, right, y, STR_PURCHASE_INFO_RUNNINGCOST);
	y += FONT_HEIGHT_NORMAL;

	return y;
}

static StringID GetAircraftEngineInfoString(const Engine *e)
{
	CargoID cargo = e->GetDefaultCargoType();
	uint16 mail_capacity;
	uint capacity = e->GetDisplayDefaultCapacity(&mail_capacity);
	uint16 range = e->GetRange();

	uint i = 0;
	SetDParam(i++, e->GetCost());
	SetDParam(i++, e->GetDisplayMaxSpeed());
	if (range > 0) SetDParam(i++, range);
	SetDParam(i++, cargo);
	SetDParam(i++, capacity);

	if (mail_capacity > 0) {
		SetDParam(i++, CT_MAIL);
		SetDParam(i++, mail_capacity);
		SetDParam(i++, e->GetRunningCost());
		return range > 0 ? STR_ENGINE_PREVIEW_COST_MAX_SPEED_RANGE_CAPACITY_CAPACITY_RUNCOST : STR_ENGINE_PREVIEW_COST_MAX_SPEED_CAPACITY_CAPACITY_RUNCOST;
	} else {
		SetDParam(i++, e->GetRunningCost());
		return range > 0 ? STR_ENGINE_PREVIEW_COST_MAX_SPEED_RANGE_CAPACITY_RUNCOST : STR_ENGINE_PREVIEW_COST_MAX_SPEED_CAPACITY_RUNCOST;
	}
}

void ServerNetworkUDPSocketHandler::Receive_CLIENT_DETAIL_INFO(Packet *p, NetworkAddress *client_addr)
{
	/* Just a fail-safe.. should never happen */
	if (!_network_udp_server) return;

	Packet packet(PACKET_UDP_SERVER_DETAIL_INFO);

	/* Send the amount of active companies */
	packet.Send_uint8 (NETWORK_COMPANY_INFO_VERSION);
	packet.Send_uint8 ((uint8)Company::GetNumItems());

	/* Fetch the latest version of the stats */
	NetworkCompanyStats company_stats[MAX_COMPANIES];
	NetworkPopulateCompanyStats(company_stats);

	/* The minimum company information "blob" size. */
	static const uint MIN_CI_SIZE = 54;
	uint max_cname_length = NETWORK_COMPANY_NAME_LENGTH;

	if (Company::GetNumItems() * (MIN_CI_SIZE + NETWORK_COMPANY_NAME_LENGTH) >= (uint)SEND_MTU - packet.size) {
		/* Assume we can at least put the company information in the packets. */
		assert(Company::GetNumItems() * MIN_CI_SIZE < (uint)SEND_MTU - packet.size);

		/* At this moment the company names might not fit in the
		 * packet. Check whether that is really the case. */

		for (;;) {
			int free = SEND_MTU - packet.size;
			Company *company;
			FOR_ALL_COMPANIES(company) {
				char company_name[NETWORK_COMPANY_NAME_LENGTH];
				SetDParam(0, company->index);
				GetString(company_name, STR_COMPANY_NAME, company_name + max_cname_length - 1);
				free -= MIN_CI_SIZE;
				free -= (int)strlen(company_name);
			}
			if (free >= 0) break;

			/* Try again, with slightly shorter strings. */
			assert(max_cname_length > 0);
			max_cname_length--;
		}
	}

	void UpdateSignEditWindow(const Sign *si)
	{
		char *last_of = &this->edit_str_buf[this->edit_str_size - 1]; // points to terminating '\0'

		/* Display an empty string when the sign hasnt been edited yet */
		if (si->name != NULL) {
			SetDParam(0, si->index);
			GetString(this->edit_str_buf, STR_SIGN_NAME, last_of);
		} else {
			GetString(this->edit_str_buf, STR_EMPTY, last_of);
		}
		*last_of = '\0';

		this->cur_sign = si->index;
		InitializeTextBuffer(&this->text, this->edit_str_buf, this->edit_str_size, this->max_chars);

		this->SetWidgetDirty(WID_QES_TEXT);
		this->SetFocusedWidget(WID_QES_TEXT);
	}

static StringID GetAircraftEngineInfoString(const Engine *e)
{
	CargoID cargo = e->GetDefaultCargoType();
	uint16 mail_capacity;
	uint capacity = e->GetDisplayDefaultCapacity(&mail_capacity);

	SetDParam(0, e->GetCost());
	SetDParam(1, e->GetDisplayMaxSpeed());
	SetDParam(2, cargo);
	SetDParam(3, capacity);

	if (mail_capacity > 0) {
		SetDParam(4, CT_MAIL);
		SetDParam(5, mail_capacity);
		SetDParam(6, e->GetRunningCost());
		return STR_ENGINE_PREVIEW_COST_MAX_SPEED_CAPACITY_CAPACITY_RUNCOST;
	} else {
		SetDParam(4, e->GetRunningCost());
		return STR_ENGINE_PREVIEW_COST_MAX_SPEED_CAPACITY_RUNCOST;
	}
}

	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
	{
		if (widget != CW_PANEL) return;

		uint width = 0;
		for (int i = 0; i != lengthof(_cheats_ui); i++) {
			const CheatEntry *ce = &_cheats_ui[i];
			switch (ce->type) {
				case SLE_BOOL:
					SetDParam(0, STR_CONFIG_SETTING_ON);
					width = max(width, GetStringBoundingBox(ce->str).width);
					SetDParam(0, STR_CONFIG_SETTING_OFF);
					width = max(width, GetStringBoundingBox(ce->str).width);
					break;

				default:
					switch (ce->str) {
						/* Display date for change date cheat */
						case STR_CHEAT_CHANGE_DATE:
							SetDParam(0, ConvertYMDToDate(MAX_YEAR, 11, 31));
							width = max(width, GetStringBoundingBox(ce->str).width);
							break;

						/* Draw coloured flag for change company cheat */
						case STR_CHEAT_CHANGE_COMPANY:
							SetDParam(0, 15);
							width = max(width, GetStringBoundingBox(ce->str).width + 10 + 10);
							break;

						/* Set correct string for switch climate cheat */
						case STR_CHEAT_SWITCH_CLIMATE:
							for (StringID i = STR_CHEAT_SWITCH_CLIMATE_TEMPERATE_LANDSCAPE; i <= STR_CHEAT_SWITCH_CLIMATE_TOYLAND_LANDSCAPE; i++) {
								SetDParam(0, i);
								width = max(width, GetStringBoundingBox(ce->str).width);
							}
							break;

						default:
							SetDParam(0, INT64_MAX);
							width = max(width, GetStringBoundingBox(ce->str).width);
							break;
					}
					break;
			}
		}

		size->width = width + 50 /* stuff on the left */ + 10 /* extra spacing on right */;
		this->header_height = GetStringHeight(STR_CHEATS_WARNING, size->width - WD_FRAMERECT_LEFT - WD_FRAMERECT_RIGHT) + WD_PAR_VSEP_WIDE;
		size->height = this->header_height + WD_FRAMERECT_TOP + WD_PAR_VSEP_NORMAL + WD_FRAMERECT_BOTTOM + (FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL) * lengthof(_cheats_ui);
	}

/* Draw locomotive specific details */
static int DrawRailEnginePurchaseInfo(int left, int right, int y, EngineID engine_number, const RailVehicleInfo *rvi)
{
	const Engine *e = Engine::Get(engine_number);

	/* Purchase Cost - Engine weight */
	SetDParam(0, e->GetCost());
	SetDParam(1, e->GetDisplayWeight());
	DrawString(left, right, y, STR_PURCHASE_INFO_COST_WEIGHT);
	y += FONT_HEIGHT_NORMAL;

	/* Max speed - Engine power */
	SetDParam(0, e->GetDisplayMaxSpeed());
	SetDParam(1, e->GetPower());
	DrawString(left, right, y, STR_PURCHASE_INFO_SPEED_POWER);
	y += FONT_HEIGHT_NORMAL;

	/* Max tractive effort - not applicable if old acceleration or maglev */
	if (_settings_game.vehicle.train_acceleration_model != AM_ORIGINAL && GetRailTypeInfo(rvi->railtype)->acceleration_type != 2) {
		SetDParam(0, e->GetDisplayMaxTractiveEffort());
		DrawString(left, right, y, STR_PURCHASE_INFO_MAX_TE);
		y += FONT_HEIGHT_NORMAL;
	}

	/* Running cost */
	if (rvi->running_cost_class != INVALID_PRICE) {
		SetDParam(0, e->GetRunningCost());
		DrawString(left, right, y, STR_PURCHASE_INFO_RUNNINGCOST);
		y += FONT_HEIGHT_NORMAL;
	}

	/* Powered wagons power - Powered wagons extra weight */
	if (rvi->pow_wag_power != 0) {
		SetDParam(0, rvi->pow_wag_power);
		SetDParam(1, rvi->pow_wag_weight);
		DrawString(left, right, y, STR_PURCHASE_INFO_PWAGPOWER_PWAGWEIGHT);
		y += FONT_HEIGHT_NORMAL;
	}

	return y;
}