Method UpdateWidgetSize

src/graph_gui.cpp:664–700

public:
	void UpdateWidgetSize(WidgetID widget, Dimension &size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension &fill, [[maybe_unused]] Dimension &resize) override
	{
		switch (widget) {
			case WID_GRAPH_RANGE_MATRIX:
				this->UpdateMatrixSize(widget, size, resize, this->ranges);
				break;

			case WID_GRAPH_SCALE_MATRIX:
				this->UpdateMatrixSize(widget, size, resize, this->scales | std::views::transform(&GraphScale::label));
				break;

			case WID_GRAPH_GRAPH: {
				uint x_label_width = 0;

				/* Draw x-axis labels and markings for graphs based on financial quarters and years.  */
				if (this->draw_dates) {
					uint year = GetParamMaxValue(this->year.base(), 4, FS_SMALL);
					for (uint month = 0; month < 12; ++month) {
						x_label_width = std::max(x_label_width, GetStringBoundingBox(GetString(month == 0 ? STR_GRAPH_X_LABEL_MONTH_YEAR : STR_GRAPH_X_LABEL_MONTH, STR_MONTH_ABBREV_JAN + month, year)).width);
					}
				} else {
					/* Draw x-axis labels for graphs not based on quarterly performance (cargo payment rates). */
					uint64_t max_value = GetParamMaxValue((this->num_on_x_axis + 1) * this->x_values_increment, 0, FS_SMALL);
					x_label_width = GetStringBoundingBox(GetString(STR_GRAPH_Y_LABEL_NUMBER, max_value)).width;
				}

				uint y_label_width = GetStringBoundingBox(GetString(STR_GRAPH_Y_LABEL, this->format_str_y_axis, INT64_MAX)).width;

				size.width  = std::max<uint>(size.width,  ScaleGUITrad(5) + y_label_width + this->num_vert_lines * (x_label_width + ScaleGUITrad(5)) + ScaleGUITrad(9));
				size.height = std::max<uint>(size.height, ScaleGUITrad(5) + (1 + MIN_GRAPH_NUM_LINES_Y * 2 + (this->draw_dates ? 3 : 1)) * GetCharacterHeight(FS_SMALL) + ScaleGUITrad(4));
				size.height = std::max<uint>(size.height, size.width / 3);
				break;
			}

			default: break;
		}
	}

	void DrawWidget(const Rect &r, WidgetID widget) const override
	{