Method restorePlotTimeRings

app/src/UI/Dashboard.cpp:2438–2466

* @brief Restores saved plot rings into the currently configured widget slots. Splices when * the new ring shape matches the saved one, replays through appendDecimated otherwise. */

 *        the new ring shape matches the saved one, replays through appendDecimated otherwise.
 */
void UI::Dashboard::restorePlotTimeRings(QHash<qint64, DSP::TimeRing>& snapshot)
{
  if (snapshot.isEmpty())
    return;

  const int n = widgetCount(SerialStudio::DashboardPlot);
  for (int i = 0; i < n; ++i) {
    auto ringIt = m_plotTimeRings.find(i);
    if (ringIt == m_plotTimeRings.end())
      continue;

    const auto& d = getDatasetWidget(SerialStudio::DashboardPlot, i);
    auto savedIt  = snapshot.find(ringSnapshotKey(d.sourceId, d.uniqueId));
    if (savedIt == snapshot.end())
      continue;

    auto& live = ringIt.value();
    auto& kept = savedIt.value();
    if (kept.time.raw() == nullptr)
      continue;

    if (live.time.capacity() == kept.time.capacity() && qFuzzyCompare(live.interval, kept.interval))
      live = std::move(kept);
    else
      replayTimeRing(kept, live);

    snapshot.erase(savedIt);
  }
}

/**
 * @brief Restores saved multiplot rings; matches by group uniqueId and per-curve shape.