Method updateData

app/src/UI/Widgets/Painter.cpp:367–405

* @brief Pulls the latest group snapshot, optionally calls onFrame(), repaints cache. */

 * @brief Pulls the latest group snapshot, optionally calls onFrame(), repaints cache.
 */
void Widgets::Painter::updateData()
{
  if (m_previewMode)
    return;

  if (m_index < 0)
    return;

  const auto* dashboard = &UI::Dashboard::instance();
  const auto count      = dashboard->widgetCount(SerialStudio::DashboardPainter);
  if (m_index >= count)
    return;

  const auto& group = dashboard->getGroupWidget(SerialStudio::DashboardPainter, m_index);
  m_bridge->setGroup(&group);
  m_bridge->setFrame(++m_frameSeq, QDateTime::currentMSecsSinceEpoch());

  DataModel::DeviceWriteApi::setJSDefaultSourceId(&m_engine, group.sourceId);

  if (m_compileDirty) {
    if (!compile(m_userCode))
      return;
  }

  if (!m_runtimeOk)
    return;

  if (m_hasOnFrame) {
    QJSValueList noArgs;
    auto r = m_watchdog.call(m_onFrameFn, noArgs);
    if (r.isError()) [[unlikely]] {
      setLastError(QStringLiteral("onFrame: ") + r.property(QStringLiteral("message")).toString());
      setRuntimeOk(false);
      return;
    }
  }

  renderFrame();
}

/**
 * @brief Preview-mode tick: same as updateData() but feeds from m_previewGroup.