Method DrawWidget

src/depot_gui.cpp:396–452

	}

	void DrawWidget(const Rect &r, WidgetID widget) const override
	{
		if (widget != WID_D_MATRIX) return;

		bool rtl = _current_text_dir == TD_RTL;

		/* Set the row and number of boxes in each row based on the number of boxes drawn in the matrix */
		const NWidgetCore *wid = this->GetWidget<NWidgetCore>(WID_D_MATRIX);

		/* Set up rect for each cell */
		Rect ir = r.WithHeight(this->resize.step_height);
		if (this->num_columns != 1) ir = ir.WithWidth(this->resize.step_width, rtl);
		ir = ir.Shrink(WidgetDimensions::scaled.framerect, RectPadding::zero);

		/* Draw vertical separators at whole tiles.
		 * This only works in two cases:
		 *  - All vehicles use VEHICLEINFO_FULL_VEHICLE_WIDTH as reference width.
		 *  - All vehicles are 8/8. This cannot be checked for NewGRF, so instead we check for "all vehicles are original vehicles".
		 */
		if (this->type == VEH_TRAIN && _consistent_train_width != 0) {
			int w = ScaleSpriteTrad(2 * _consistent_train_width);
			PixelColour col = GetColourGradient(wid->colour, SHADE_NORMAL);
			Rect image = ir.Indent(this->header_width, rtl).Indent(this->count_width, !rtl);
			int first_line = w + (-this->hscroll->GetPosition()) % w;
			if (rtl) {
				for (int x = image.right - first_line; x >= image.left; x -= w) {
					GfxDrawLine(x, r.top, x, r.bottom, col, ScaleGUITrad(1), ScaleGUITrad(3));
				}
			} else {
				for (int x = image.left + first_line; x <= image.right; x += w) {
					GfxDrawLine(x, r.top, x, r.bottom, col, ScaleGUITrad(1), ScaleGUITrad(3));
				}
			}
		}

		uint16_t rows_in_display = wid->current_y / wid->resize_y;

		uint num = this->vscroll->GetPosition() * this->num_columns;
		uint maxval = static_cast<uint>(std::min<size_t>(this->vehicle_list.size(), num + (rows_in_display * this->num_columns)));
		for (; num < maxval; ir = ir.Translate(0, this->resize.step_height)) { // Draw the rows
			Rect cell = ir; /* Keep track of horizontal cells */
			for (uint i = 0; i < this->num_columns && num < maxval; i++, num++) {
				/* Draw all vehicles in the current row */
				const Vehicle *v = this->vehicle_list[num];
				this->DrawVehicleInDepot(v, cell);
				cell = cell.Translate(rtl ? -(int)this->resize.step_width : (int)this->resize.step_width, 0);
			}
		}

		maxval = static_cast<uint>(std::min<size_t>(this->vehicle_list.size() + this->wagon_list.size(), (this->vscroll->GetPosition() * this->num_columns) + (rows_in_display * this->num_columns)));

		/* Draw the train wagons without an engine in front. */
		for (; num < maxval; num++, ir = ir.Translate(0, this->resize.step_height)) {
			const Vehicle *v = this->wagon_list[num - this->vehicle_list.size()];
			this->DrawVehicleInDepot(v, ir);
		}
	}