Method DrawWidget

src/industry_gui.cpp:2949–2986

	}

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

		Rect ir = r.Shrink(WidgetDimensions::scaled.bevel);
		DrawPixelInfo tmp_dpi;
		if (!FillDrawPixelInfo(&tmp_dpi, ir)) return;
		AutoRestoreBackup dpi_backup(_cur_dpi, &tmp_dpi);

		int left_pos = WidgetDimensions::scaled.frametext.left - WidgetDimensions::scaled.bevel.left;
		if (this->ind_cargo >= NUM_INDUSTRYTYPES) left_pos += (CargoesField::industry_width + CargoesField::cargo_field_width) / 2;
		int last_column = (this->ind_cargo < NUM_INDUSTRYTYPES) ? 4 : 2;

		const NWidgetBase *nwp = this->GetWidget<NWidgetBase>(WID_IC_PANEL);
		int vpos = WidgetDimensions::scaled.frametext.top - WidgetDimensions::scaled.bevel.top - this->vscroll->GetPosition() * nwp->resize_y;
		int row_height = CargoesField::small_height;
		for (const auto &field : this->fields) {
			if (vpos + row_height >= 0) {
				int xpos = left_pos;
				int col, dir;
				if (_current_text_dir == TD_RTL) {
					col = last_column;
					dir = -1;
				} else {
					col = 0;
					dir = 1;
				}
				while (col >= 0 && col <= last_column) {
					field.columns[col].Draw(xpos, vpos);
					xpos += (col & 1) ? CargoesField::cargo_field_width : CargoesField::industry_width;
					col += dir;
				}
			}
			vpos += row_height;
			if (vpos >= height) break;
			row_height = CargoesField::normal_height;
		}
	}

	/**
	 * Calculate in which field was clicked, and within the field, at what position.