diff -r f77d2230e87c -r d384df40c8e7 src/model.h
--- a/src/model.h	Wed Sep 22 00:25:13 2021 +0300
+++ b/src/model.h	Wed Sep 22 00:25:31 2021 +0300
@@ -37,6 +37,7 @@
 	Model(QObject* parent = nullptr);
 	Model(const Model&) = delete;
 	int size() const;
+	ldraw::id_t at(int index) const;
 	EditContext edit();
 	int rowCount(const QModelIndex&) const override;
 	QVariant data(const QModelIndex& index, int role) const override;
@@ -88,6 +89,8 @@
 		const int index,
 		std::vector<gl::Polygon>& polygons_out,
 		ldraw::GetPolygonsContext* context) const;
+	void editFinished();
+	void objectModified(ldraw::id_t id);
 	bool modified = false;
 	QString path;
 	LDHeader header;
@@ -95,6 +98,7 @@
 	std::map<ldraw::id_t, ldraw::Object*> objectsById;
 	mutable std::vector<gl::Polygon> cachedPolygons;
 	mutable bool needRecache = true;
+	int editCounter = 0;
 };
 
 /**