Method applyToSelected

pj_plotting/widget/src/FilterEditorPanel.cpp:738–871

}

void FilterEditorPanel::applyToSelected() {
  const QList<QListWidgetItem*> selected = ui_->series_list->selectedItems();
  if (selected.isEmpty()) {
    ui_->status_label->setText(tr("Select at least one source curve"));
    return;
  }

  auto& service = session_->dataProcessorService();

  // Record the visible source's config into per-source memory FIRST, so a pasted /
  // edited filter on the source you are looking at (even an existing output) is
  // included — this is the single authority Apply reads, same as the preview.
  saveActiveSourceFilter();

  const std::string visible_id = currentFilterId();
  QList<QPair<QString, QString>> replacements;
  QStringList failures;

  // Removal: the active source is an existing filter OUTPUT set to "No Transform" ->
  // remove its filter and revert the plotted curve to its original input. (Collected,
  // not returned, so OTHER configured sources in the same Apply still run.)
  if (!active_source_key_.isEmpty() && visible_id == "none") {
    for (const CurveDescriptor& descriptor : sources_) {
      if (descriptor.name != active_source_key_) {
        continue;
      }
      if (const auto* recipe = service.filterConfig(descriptor.topic_id)) {
        const QString output_key = curveKey(recipe->dataset_id, recipe->output_topic_id, 0);
        const QString input_key = curveKey(recipe->dataset_id, recipe->input_topic_id, recipe->input_column_index);
        if (const auto removed = service.removeFilter(recipe->node_id); removed.has_value()) {
          // Drop the now-orphaned output topic (removeNode leaves the series in the
          // store); the trash blacklist keeps it off the next rebuild.
          catalog_->removeCurves({output_key});
          replacements.push_back({output_key, input_key});  // host swaps output -> input
        } else {
          failures << tr("remove %1: %2").arg(readableName(descriptor), QString::fromStdString(removed.error()));
        }
      }
      break;
    }
  }

  // Plain multi-selection convenience: a selected source with no remembered
  // transform of its own inherits the currently-visible one, so ctrl-selecting N
  // curves and picking a single filter applies it to all N.
  if (visible_id != "none") {
    const QString visible_params = QString::fromStdString(param_form_->values().dump());
    for (const QListWidgetItem* item : selected) {
      const QString key = sources_[static_cast<std::size_t>(item->data(Qt::UserRole).toInt())].name;
      if (!source_filters_.contains(key)) {
        source_filters_[key] = {QString::fromStdString(visible_id), visible_params};
      }
    }
  }

  if (source_filters_.isEmpty() && replacements.isEmpty() && failures.isEmpty()) {
    ui_->status_label->setText(tr("Pick a filter to apply"));
    return;