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83 lines
2.6 KiB
83 lines
2.6 KiB
#include "tools/cabana/chart/sparkline.h"
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#include <QPainter>
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#include "tools/cabana/streams/abstractstream.h"
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void Sparkline::update(const MessageId &msg_id, const cabana::Signal *sig, double last_msg_ts, int range, QSize size) {
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const auto &msgs = can->events(msg_id);
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uint64_t ts = (last_msg_ts + can->routeStartTime()) * 1e9;
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uint64_t first_ts = (ts > range * 1e9) ? ts - range * 1e9 : 0;
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auto first = std::lower_bound(msgs.cbegin(), msgs.cend(), first_ts, [](auto e, uint64_t ts) {
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return e->mono_time < ts;
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});
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auto last = std::upper_bound(first, msgs.cend(), ts, [](uint64_t ts, auto e) {
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return ts < e->mono_time;
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});
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bool update_values = last_ts != last_msg_ts || time_range != range;
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last_ts = last_msg_ts;
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time_range = range;
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if (first != last) {
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if (update_values) {
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values.clear();
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if (values.capacity() < std::distance(first, last)) {
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values.reserve(std::distance(first, last) * 2);
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}
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min_val = std::numeric_limits<double>::max();
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max_val = std::numeric_limits<double>::lowest();
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for (auto it = first; it != last; ++it) {
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const CanEvent *e = *it;
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double value = 0;
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if (sig->getValue(e->dat, e->size, &value)) {
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values.emplace_back((e->mono_time - (*first)->mono_time) / 1e9, value);
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if (min_val > value) min_val = value;
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if (max_val < value) max_val = value;
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}
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}
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if (min_val == max_val) {
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min_val -= 1;
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max_val += 1;
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}
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}
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} else {
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values.clear();
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}
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if (!values.empty()) {
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render(sig->color, size);
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} else {
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pixmap = QPixmap();
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min_val = -1;
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max_val = 1;
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}
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}
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void Sparkline::render(const QColor &color, QSize size) {
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const double xscale = (size.width() - 1) / (double)time_range;
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const double yscale = (size.height() - 3) / (max_val - min_val);
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points.clear();
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points.reserve(values.capacity());
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for (auto &v : values) {
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points.emplace_back(v.x() * xscale, 1 + std::abs(v.y() - max_val) * yscale);
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}
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qreal dpr = qApp->devicePixelRatio();
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size *= dpr;
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if (size != pixmap.size()) {
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pixmap = QPixmap(size);
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}
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pixmap.setDevicePixelRatio(dpr);
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pixmap.fill(Qt::transparent);
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QPainter painter(&pixmap);
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painter.setRenderHint(QPainter::Antialiasing, points.size() < 500);
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painter.setPen(color);
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painter.drawPolyline(points.data(), points.size());
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painter.setPen(QPen(color, 3));
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if ((points.back().x() - points.front().x()) / points.size() > 8) {
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painter.drawPoints(points.data(), points.size());
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} else {
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painter.drawPoint(points.back());
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}
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}
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