155 lines
3.5 KiB
C++
155 lines
3.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "data/data_statistics.h"
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namespace Data {
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namespace {
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} // namespace
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void StatisticalChart::measure() {
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if (x.empty()) {
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return;
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}
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const auto n = x.size();
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const auto start = x.front();
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const auto end = x.back();
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xPercentage.clear();
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xPercentage.resize(n);
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if (n == 1) {
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xPercentage[0] = 1;
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} else {
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for (auto i = 0; i < n; i++) {
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xPercentage[i] = (x[i] - start) / float64(end - start);
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}
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}
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for (auto i = 0; i < lines.size(); i++) {
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if (lines[i].maxValue > maxValue) {
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maxValue = lines[i].maxValue;
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}
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if (lines[i].minValue < minValue) {
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minValue = lines[i].minValue;
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}
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lines[i].segmentTree = Statistic::SegmentTree(lines[i].y);
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}
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daysLookup.clear();
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const auto dateCount = int((end - start) / timeStep) + 10;
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daysLookup.reserve(dateCount);
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constexpr auto kOneDay = 3600 * 24 * 1000;
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const auto formatter = u"MMM d"_q;
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for (auto i = 0; i < dateCount; i++) {
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const auto r = (start + (i * timeStep)) / 1000;
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const auto dateTime = QDateTime::fromSecsSinceEpoch(r);
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if (timeStep == 1) {
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daysLookup.push_back(
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QString(((i < 10) ? u"0%1:00"_q : u"%1:00"_q).arg(i)));
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} else if (timeStep < kOneDay) {
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daysLookup.push_back(u"%1:%2"_q
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.arg(dateTime.time().hour(), 2, 10, QChar('0'))
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.arg(dateTime.time().minute(), 2, 10, QChar('0')));
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} else {
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const auto date = dateTime.date();
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daysLookup.push_back(QLocale().toString(date, formatter));
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}
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}
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oneDayPercentage = timeStep / float64(end - start);
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}
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QString StatisticalChart::getDayString(int i) const {
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return daysLookup[int((x[i] - x[0]) / timeStep)];
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}
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int StatisticalChart::findStartIndex(float v) const {
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if (v == 0) {
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return 0;
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}
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const auto n = int(xPercentage.size());
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if (n < 2) {
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return 0;
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}
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auto left = 0;
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auto right = n - 1;
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while (left <= right) {
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const auto middle = (right + left) >> 1;
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if (v < xPercentage[middle]
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&& (middle == 0 || v > xPercentage[middle - 1])) {
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return middle;
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}
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if (v == xPercentage[middle]) {
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return middle;
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}
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if (v < xPercentage[middle]) {
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right = middle - 1;
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} else if (v > xPercentage[middle]) {
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left = middle + 1;
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}
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}
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return left;
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}
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int StatisticalChart::findEndIndex(int left, float v) const {
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const auto n = int(xPercentage.size());
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if (v == 1.) {
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return n - 1;
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}
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auto right = n - 1;
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while (left <= right) {
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const auto middle = (right + left) >> 1;
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if (v > xPercentage[middle]
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&& (middle == n - 1 || v < xPercentage[middle + 1])) {
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return middle;
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}
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if (v == xPercentage[middle]) {
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return middle;
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}
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if (v < xPercentage[middle]) {
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right = middle - 1;
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} else if (v > xPercentage[middle]) {
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left = middle + 1;
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}
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}
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return right;
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}
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int StatisticalChart::findIndex(int left, int right, float v) const {
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const auto n = int(xPercentage.size());
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if (v <= xPercentage[left]) {
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return left;
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}
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if (v >= xPercentage[right]) {
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return right;
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}
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while (left <= right) {
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const auto middle = (right + left) >> 1;
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if (v > xPercentage[middle]
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&& (middle == n - 1 || v < xPercentage[middle + 1])) {
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return middle;
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}
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if (v == xPercentage[middle]) {
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return middle;
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}
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if (v < xPercentage[middle]) {
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right = middle - 1;
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} else if (v > xPercentage[middle]) {
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left = middle + 1;
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}
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}
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return right;
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}
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} // namespace Data
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