Method OnPlaceObject

src/dock_gui.cpp:195–246

	}

	void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
	{
		switch (this->last_clicked_widget) {
			case WID_DT_CANAL: // Build canal button
				VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_CREATE_WATER);
				break;

			case WID_DT_LOCK: // Build lock button
				Command<CMD_BUILD_LOCK>::Post(STR_ERROR_CAN_T_BUILD_LOCKS, CcBuildDocks, tile);
				break;

			case WID_DT_DEMOLISH: // Demolish aka dynamite button
				PlaceProc_DemolishArea(tile);
				break;

			case WID_DT_DEPOT: // Build depot button
				Command<CMD_BUILD_SHIP_DEPOT>::Post(STR_ERROR_CAN_T_BUILD_SHIP_DEPOT, CcBuildDocks, tile, _ship_depot_direction);
				break;

			case WID_DT_STATION: { // Build station button
				/* Determine the watery part of the dock. */
				DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile));
				TileIndex tile_to = (dir != INVALID_DIAGDIR ? TileAddByDiagDir(tile, ReverseDiagDir(dir)) : tile);

				bool adjacent = _ctrl_pressed;
				auto proc = [=](bool test, StationID to_join) -> bool {
					if (test) {
						return Command<CMD_BUILD_DOCK>::Do(CommandFlagsToDCFlags(GetCommandFlags<CMD_BUILD_DOCK>()), tile, StationID::Invalid(), adjacent).Succeeded();
					} else {
						return Command<CMD_BUILD_DOCK>::Post(STR_ERROR_CAN_T_BUILD_DOCK_HERE, CcBuildDocks, tile, to_join, adjacent);
					}
				};

				ShowSelectStationIfNeeded(TileArea(tile, tile_to), proc);
				break;
			}

			case WID_DT_BUOY: // Build buoy button
				Command<CMD_BUILD_BUOY>::Post(STR_ERROR_CAN_T_POSITION_BUOY_HERE, CcBuildDocks, tile);
				break;

			case WID_DT_RIVER: // Build river button (in scenario editor)
				VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_CREATE_RIVER);
				break;

			case WID_DT_BUILD_AQUEDUCT: // Build aqueduct button
				Command<CMD_BUILD_BRIDGE>::Post(STR_ERROR_CAN_T_BUILD_AQUEDUCT_HERE, CcBuildBridge, tile, GetOtherAqueductEnd(tile), TRANSPORT_WATER, 0, 0);
				break;

			default: NOT_REACHED();
		}
	}

	void OnPlaceDrag(ViewportPlaceMethod select_method, [[maybe_unused]] ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt) override
	{