Method updateEntries

src/openms_gui/source/VISUAL/SpectraTreeTab.cpp:299–593

  }

  void SpectraTreeTab::updateEntries(LayerDataBase* layer)
  {
    if (layer == nullptr)
    {
      clear();
      return;
    }
    layer_ = layer;

    if (!spectra_treewidget_->isVisible() || spectra_treewidget_->signalsBlocked())
    {
      return;
    }
    
    spectra_treewidget_->blockSignals(true);
    RAIICleanup clean([&](){
      spectra_treewidget_->blockSignals(false); 
    });

    QTreeWidgetItem* toplevel_item = nullptr;
    QTreeWidgetItem* selected_item = nullptr;
    QList<QTreeWidgetItem*> toplevel_items;
    bool more_than_one_spectrum = true;

    // Branch if the current layer is a spectrum
    if (auto* lp = dynamic_cast<LayerDataPeak*>(layer))
    {
      Size spec_index = std::numeric_limits<Size>::max();
      if (auto* layer_peak1d = dynamic_cast<LayerData1DPeak*>(lp))
      {
        spec_index = layer_peak1d->getCurrentIndex();
      }
      const auto& cl = *lp;
      spectra_treewidget_->clear();

      std::vector<QTreeWidgetItem *> parent_stack;
      parent_stack.push_back(nullptr);
      bool fail = false;
      last_peakmap_ = &(*cl.getPeakData());
      spectra_treewidget_->setHeaders(ClmnPeak::HEADER_NAMES);

      for (Size i = 0; i < cl.getPeakData()->size(); ++i)
      {
        const MSSpectrum& current_spec = (*cl.getPeakData())[i];

        if (i > 0)
        {
          const MSSpectrum& prev_spec = (*cl.getPeakData())[i-1];
          // current MS level = previous MS level + 1 (e.g. current: MS2, previous: MS1)
          if (current_spec.getMSLevel() == prev_spec.getMSLevel() + 1)
          {
            toplevel_item = new QTreeWidgetItem(parent_stack.back());
            parent_stack.resize(parent_stack.size() + 1);
          }
          // current MS level = previous MS level (e.g. MS2,MS2 or MS1,MS1)
          else if (current_spec.getMSLevel() == prev_spec.getMSLevel())
          {
            if (parent_stack.size() == 1)