Method UpdateStatistics

src/graph_gui.cpp:852–904

* Update the statistics. * @param initialize Initialize the data structure. */

	 * @param initialize Initialize the data structure.
	 */
	void UpdateStatistics(bool initialize) override
	{
		CompanyMask excluded_companies = _legend_excluded_companies;

		/* Exclude the companies which aren't valid */
		for (CompanyID c = CompanyID::Begin(); c < MAX_COMPANIES; ++c) {
			if (!Company::IsValidID(c)) excluded_companies.Set(c);
		}

		uint8_t nums = 0;
		for (const Company *c : Company::Iterate()) {
			nums = std::min(this->num_vert_lines, std::max(nums, c->num_valid_stat_ent));
		}

		int mo = (TimerGameEconomy::month / this->month_increment - nums) * this->month_increment;
		auto yr = TimerGameEconomy::year;
		while (mo < 0) {
			yr--;
			mo += 12;
		}

		if (!initialize && this->excluded_data == excluded_companies.base() && this->num_on_x_axis == nums &&
				this->year == yr && this->month == mo) {
			/* There's no reason to get new stats */
			return;
		}

		this->excluded_data = excluded_companies.base();
		this->num_on_x_axis = nums;
		this->year = yr;
		this->month = mo;

		this->data.clear();
		for (CompanyID k = CompanyID::Begin(); k < MAX_COMPANIES; ++k) {
			const Company *c = Company::GetIfValid(k);
			if (c == nullptr) continue;

			DataSet &dataset = this->data.emplace_back();
			dataset.colour = GetColourGradient(c->colour, SHADE_LIGHTER);
			dataset.exclude_bit = k.base();

			for (int j = this->num_on_x_axis, i = 0; --j >= 0;) {
				if (j >= c->num_valid_stat_ent) {
					dataset.values[i] = INVALID_DATAPOINT;
				} else {
					/* Ensure we never assign INVALID_DATAPOINT, as that has another meaning.
					 * Instead, use the value just under it. Hopefully nobody will notice. */
					dataset.values[i] = std::min(GetGraphData(c, j), INVALID_DATAPOINT - 1);
				}
				i++;
			}
		}
	}

	virtual OverflowSafeInt64 GetGraphData(const Company *, int) = 0;
};