Method restoreMultiplotTimeRings

app/src/UI/Dashboard.cpp:2471–2504

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

 * @brief Restores saved multiplot rings; matches by group uniqueId and per-curve shape.
 */
void UI::Dashboard::restoreMultiplotTimeRings(QHash<qint64, std::vector<DSP::TimeRing>>& snapshot)
{
  if (snapshot.isEmpty())
    return;

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

    const auto& g = getGroupWidget(SerialStudio::DashboardMultiPlot, i);
    auto savedIt  = snapshot.find(ringSnapshotKey(g.sourceId, g.uniqueId));
    if (savedIt == snapshot.end())
      continue;

    auto& live = ringIt.value();
    auto& kept = savedIt.value();

    const std::size_t count = std::min(live.size(), kept.size());
    for (std::size_t j = 0; j < count; ++j) {
      if (kept[j].time.raw() == nullptr)
        continue;

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

    snapshot.erase(savedIt);
  }
}

/**
 * @brief Re-applies saved sweep trigger settings onto freshly configured plot engines.