Method currentCellChanged_

src/openms_gui/source/VISUAL/SpectraIDViewTab.cpp:389–519

  }

  void SpectraIDViewTab::currentCellChanged_(int row, int column, int /*old_row*/, int /*old_column*/)
  {
    // TODO you actually only have to do repainting if the row changes..
    // sometimes Qt calls this function when table empty during refreshing
    if (row < 0 || column < 0)
    {
      return;
    }

    if (row >= table_widget_->rowCount()
        ||  column >= table_widget_->columnCount())
    {
      throw Exception::InvalidValue(__FILE__, __LINE__, OPENMS_PRETTY_FUNCTION, "invalid cell clicked.", String(row) + " " + column);
    }
    
    // deselect whatever is currently shown (if we are in 1D view)
    auto* layer_1d = dynamic_cast<LayerData1DPeak*>(layer_);
    if (layer_1d)
    {
      emit spectrumDeselected(int(layer_1d->getCurrentIndex()));
    }

    int current_spectrum_index = table_widget_->item(row, Clmn::SPEC_INDEX)->data(Qt::DisplayRole).toInt();
    const auto& exp = *layer_->getPeakData();
    const auto& spec2 = exp[current_spectrum_index];

    //
    // Signal for a new spectrum to be shown
    //
    // show precursor spectrum (usually MS1)
    if (column == Clmn::PRECURSOR_MZ)
    {
      const auto prec_it = exp.getPrecursorSpectrum(exp.begin() + current_spectrum_index);

      if (prec_it != exp.end() && !spec2.getPrecursors().empty())
      {
        double precursor_mz = spec2.getPrecursors()[0].getMZ();
        // determine start and stop of isolation window
        double isolation_window_lower_mz = precursor_mz - spec2.getPrecursors()[0].getIsolationWindowLowerOffset();
        double isolation_window_upper_mz = precursor_mz + spec2.getPrecursors()[0].getIsolationWindowUpperOffset();

        emit spectrumSelected(std::distance(exp.begin(), prec_it), -1, -1);// no identification or hit selected (-1)
        // zoom into precursor area
        emit requestVisibleArea1D(isolation_window_lower_mz - 50.0, isolation_window_upper_mz + 50.0);
      }
    }
    else
    {// if spectrum with no PepIDs is selected, there is nothing to show...
      auto item_pepid = table_widget_->item(row, Clmn::ID_NR);
      if (item_pepid == nullptr// null for MS1 spectra
          || (!(item_pepid->data(Qt::DisplayRole).isValid())))
      {
        return;
      }
      int current_identification_index = item_pepid->data(Qt::DisplayRole).toInt();
      int current_peptide_hit_index = table_widget_->item(row, Clmn::PEPHIT_NR)->data(Qt::DisplayRole).toInt();
      emit spectrumSelected(current_spectrum_index, current_identification_index, current_peptide_hit_index);
    }