Method OnClick

src/order_gui.cpp:1162–1320

	}

	void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
	{
		switch (widget) {
			case WID_O_ORDER_LIST: {
				if (this->goto_type == OPOS_CONDITIONAL) {
					VehicleOrderID order_id = this->GetOrderFromPt(_cursor.pos.y - this->top);
					if (order_id != INVALID_VEH_ORDER_ID) {
						Order order{};
						order.MakeConditional(order_id);

						Command<CMD_INSERT_ORDER>::Post(STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index, this->OrderGetSel(), order);
					}
					ResetObjectToPlace();
					break;
				}

				VehicleOrderID sel = this->GetOrderFromPt(pt.y);

				if (_ctrl_pressed && sel < this->vehicle->GetNumOrders()) {
					TileIndex xy = this->vehicle->GetOrder(sel)->GetLocation(this->vehicle);
					if (xy != INVALID_TILE) ScrollMainWindowToTile(xy);
					return;
				}

				/* This order won't be selected any more, close all child windows and dropdowns */
				this->CloseChildWindows();

				if (sel == INVALID_VEH_ORDER_ID || this->vehicle->owner != _local_company) {
					/* Deselect clicked order */
					this->selected_order = -1;
				} else if (sel == this->selected_order && click_count > 1) {
					if (this->vehicle->type == VEH_TRAIN && sel < this->vehicle->GetNumOrders()) {
						Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER,
								this->vehicle->tile, this->vehicle->index, sel,
								MOF_STOP_LOCATION, (to_underlying(this->vehicle->GetOrder(sel)->GetStopLocation()) + 1) % to_underlying(OrderStopLocation::End));
					}
				} else {
					/* Select clicked order */
					this->selected_order = sel;

					if (this->vehicle->owner == _local_company) {
						/* Activate drag and drop */
						SetObjectToPlaceWnd(SPR_CURSOR_MOUSE, PAL_NONE, HT_DRAG, this);
					}
				}

				this->UpdateButtonState();
				break;
			}

			case WID_O_SKIP:
				this->OrderClick_Skip();
				break;

			case WID_O_DELETE:
				this->OrderClick_Delete();
				break;