Method getTreeRootObjects

src/Gui/Document.cpp:3173–3200

}

std::vector<App::DocumentObject*> Document::getTreeRootObjects() const
{
    std::vector<App::DocumentObject*> docObjects = d->_pcDocument->getObjects();
    std::unordered_map<App::DocumentObject*, bool> rootMap;
    for (auto it : docObjects) {
        rootMap[it] = true;
    }

    for (auto obj : docObjects) {
        ViewProvider* vp = Application::Instance->getViewProvider(obj);
        if (!vp) {
            continue;
        }

        std::vector<App::DocumentObject*> children = vp->claimChildren();
        for (auto child : children) {
            rootMap[child] = false;
        }
    }

    std::vector<App::DocumentObject*> rootObjs;
    for (const auto& it : rootMap) {
        if (it.second) {
            rootObjs.push_back(it.first);
        }
    }
    return rootObjs;
}