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]);

				needed_height = max(needed_height, text_end - (int)nwi->pos_y + WD_FRAMERECT_BOTTOM);

			}

		}

		if (!this->IsShaded() && needed_height != this->details_height) { // Details window are not high enough, enlarge them.

			this->details_height = needed_height;

			this->ReInit();

			return;

		}

	}

	{

		switch (widget) {

			case RVW_WIDGET_TRAIN_ENGINEWAGON_TOGGLE:

				this->replace_engines  = !(this->replace_engines);

				this->engines[0].ForceRebuild();

				this->reset_sel_engine = true;

				this->SetDirty();

				break;

			case RVW_WIDGET_TRAIN_RAILTYPE_DROPDOWN: { // Railtype selection dropdown menu

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

				DropDownList *list = new DropDownList();