Method checkReferences2D

src/Mod/TechDraw/App/DrawViewDimension.cpp:1660–1699

validate 2D references - only checks if the target exists

//! validate 2D references - only checks if the target exists
bool DrawViewDimension::checkReferences2D() const
{
    const std::vector<App::DocumentObject*>& objects = References2D.getValues();
    if (objects.empty()) {
        return false;
    }

    const std::vector<std::string>& subElements = References2D.getSubValues();
    if (subElements.empty()) {
        // must have at least 1 null string entry to balance DVP
        return false;
    }

    if (subElements.front().empty() && !References3D.getValues().empty()) {
        // this is (probably) a dim with 3d refs
        return true;
    }

    for (auto& sub : subElements) {
        if (sub.empty()) {
            return false;
        }

        int idx = DrawUtil::getIndexFromName(sub);
        if (DrawUtil::getGeomTypeFromName(sub) == "Edge") {
            TechDraw::BaseGeomPtr geom = getViewPart()->getGeomByIndex(idx);
            if (!geom) {
                return false;
            }
        }
        else if (DrawUtil::getGeomTypeFromName(sub) == "Vertex") {
            TechDraw::VertexPtr vert = getViewPart()->getProjVertexByIndex(idx);
            if (!vert) {
                return false;
            }
        }
    }

    return true;
}

//! detect the state where 3d references have been nulled out due to
//! object deletion and the reference will need to be rebuilt.