Method saveLayoutToPath

pj_app/src/MainWindow.cpp:3038–3090

}

void MainWindow::saveLayoutToPath(const QString& path, bool include_data_source) {
  QDomDocument doc = xmlSaveState();
  // Record the binding intent so load knows whether to reload the original
  // file (source-bound) or adopt the currently-loaded dataset (generic). The
  // data-source element below is only embedded for source-bound layouts.
  doc.documentElement().setAttribute(
      QStringLiteral("binding"), include_data_source ? QStringLiteral("source") : QStringLiteral("generic"));
  if (include_data_source) {
    const QDir layout_dir(QFileInfo(path).absoluteDir());
    QDomElement ds = appendDataSourceElement(doc, layout_dir);
    if (!ds.isNull()) {
      doc.documentElement().appendChild(ds);
    }
  }
  // Always save right-panel state — pure UI chrome, no privacy cost,
  // not gated by Save Data Source.
  doc.documentElement().appendChild(saveRightPanelState(doc));
  // Always save the remaining widget state — pure UI chrome, not gated
  // by Save Data Source.
  doc.documentElement().appendChild(ui_->leftPanel->saveSourcesState(doc));
  doc.documentElement().appendChild(ui_->curveListPanel->saveListState(doc));
  doc.documentElement().appendChild(saveChromeState(doc));
  // NOTE: <data_processors> is already emitted by xmlSaveState() (it is part of THE
  // snapshot now, shared with undo/redo); do not append it again here or the layout
  // would carry two copies.
  // Timeline view chrome (zoom/scroll/name-column/snap). Pure UI, not gated by
  // Save Data Source; the per-source offsets/order ride <fileInfo> separately.
  doc.documentElement().appendChild(saveSourceTimelineViewState(doc));
  // QSaveFile gives us write-temp + rename atomicity: a partial write
  // (disk full, signal, broken NFS) leaves the user's prior layout
  // untouched. commit() does the rename; cancelWriting() abandons the
  // tempfile. A QFile::Truncate path would have destroyed prior state
  // before completing the write.
  QSaveFile file(path);
  if (!file.open(QIODevice::WriteOnly)) {
    MessageBox::warning(this, tr("Save Layout"), tr("Cannot open '%1' for writing.").arg(path));
    return;
  }
  const QByteArray bytes = doc.toByteArray(2);
  if (file.write(bytes) != bytes.size()) {
    const QString err = file.errorString();
    file.cancelWriting();
    MessageBox::warning(this, tr("Save Layout"), tr("Failed to write layout to '%1': %2").arg(path, err));
    return;
  }
  if (!file.commit()) {
    MessageBox::warning(
        this, tr("Save Layout"), tr("Failed to finalize layout '%1': %2").arg(path, file.errorString()));
    return;
  }
  recordRecentLayout(path);
  emitDiagnostic(DiagnosticLevel::kInfo, "Layout", "saved", tr("Saved layout: %1").arg(QFileInfo(path).fileName()));
}

QDomElement MainWindow::saveDataProcessors(QDomDocument& doc) const {
  QDomElement element = doc.createElement(QStringLiteral("data_processors"));