+ // now allow to deselect in this attribute: extrusion from/to
+ //if(!theObject)
+ // return;
+ ObjectPtr aValue = value();
+ if (!myIsInitialized || aValue != theObject) {
+ REMOVE_BACK_REF(aValue);
+
+ TDF_Label anObjLab;
+ if (theObject.get() && theObject->data()->isValid()) {
+ std::shared_ptr<Model_Data> aData = std::dynamic_pointer_cast<Model_Data>(
+ theObject->data());
+ anObjLab = aData->label().Father(); // object label
+ }
+ // same document, use reference attribute
+ if (anObjLab.IsNull() || owner()->document() == theObject->document()) {
+
+ std::shared_ptr<Model_Document> aDoc =
+ std::dynamic_pointer_cast<Model_Document>(owner()->document());
+ if (anObjLab.IsNull()) {
+ myRef->Set(myRef->Label());
+ } else {
+ myRef->Set(anObjLab); // references to the object label
+ }
+ // remove external link attributes (if any)
+ myRef->Label().ForgetAttribute(TDataStd_Comment::GetID());
+ myRef->Label().ForgetAttribute(TDataStd_AsciiString::GetID());
+ } else { // different document: store the document name (comment) and entry (string): external
+ // if these attributes exist, the link is external: keep reference to access the label
+ TDataStd_Comment::Set(myRef->Label(), theObject->document()->id().c_str());
+ TCollection_AsciiString anEntry;
+ TDF_Tool::Entry(anObjLab, anEntry);
+ TDataStd_AsciiString::Set(myRef->Label(), anEntry);
+ }
+ // do it before the transaction finish to make just created/removed objects know dependencies
+ // and reference from composite feature is removed automatically
+ ADD_BACK_REF(theObject);
+