Function restoreNode

pj_plotting/widget/src/PlotDocker.cpp:313–381

}

void restoreNode(
    const LayoutNode& node, DockWidget* widget, RestorePlotPool& pool,
    const PlotDocker::ObjectWidgetFactory& object_factory) {
  if (widget == nullptr) {
    return;
  }

  if (node.type == LayoutNode::Type::kArea) {
    widget->setStateId(node.area_id);
    widget->setName(node.area_name.isEmpty() ? QStringLiteral("...") : node.area_name);

    const QDomElement dock_element = node.plots.isEmpty() ? QDomElement{} : node.plots.front();

    if (isObjectWidgetElement(dock_element)) {
      // Object-widget path: build an empty dock by kind (the XML tag), then ask
      // it to load its own payload. Unknown kind (no factory / null result) →
      // leave the dock as-is rather than mis-parsing a scene element as a plot.
      IDataWidget* obj = object_factory ? object_factory(dock_element.tagName(), nullptr, widget) : nullptr;
      if (obj != nullptr) {
        widget->setObjectWidget(obj);
        obj->xmlLoadState(dock_element);
      }
      return;
    }

    // Plot path
    PlotWidget* plot = widget->plotWidget();
    if (plot == nullptr) {
      plot = pool.takeForArea(node);
      widget->setPlotWidget(plot);
    }
    if (!dock_element.isNull()) {
      plot->xmlLoadState(dock_element);
    } else {
      plot->removeAllCurves();
    }
    return;
  }

  if (node.children.isEmpty()) {
    return;
  }

  QVector<DockWidget*> widgets;
  widgets.push_back(widget);
  DockWidget* split_anchor = widget;
  for (qsizetype index = 1; index < node.children.size(); ++index) {
    const LayoutNode& child = node.children.at(index);
    const bool child_is_object = isObjectWidgetElement(firstLeafElement(child));
    if (child_is_object) {
      // No plot needed — the leaf will install an object widget itself.
      split_anchor =
          node.orientation == Qt::Horizontal ? split_anchor->splitHorizontal() : split_anchor->splitVertical();
    } else {
      PlotWidget* child_plot = pool.takeFirstForNode(child);
      split_anchor = node.orientation == Qt::Horizontal ? split_anchor->splitHorizontal(child_plot)
                                                        : split_anchor->splitVertical(child_plot);
    }