Index: extobj.h
===================================================================
--- extobj.h	(nonexistent)
+++ extobj.h	(revision 10859)
@@ -0,0 +1,45 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  cschem - modular/flexible schematics editor - libcschem (core library)
+ *  Copyright (C) 2024 Tibor 'Igor2' Palinkas
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.*
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/sch-rnd
+ *    contact lead developer: http://www.repo.hu/projects/sch-rnd/contact.html
+ *    mailing list: http://www.repo.hu/projects/sch-rnd/contact.html
+ */
+
+#include <libcschem/concrete.h>
+
+typedef struct csch_extobj_impl_s {
+	const char *name;   /* also the hash key */
+
+	void (*attr_edit_pre)(csch_cgrp_t *grp, const char *key);
+	void (*attr_edit_post)(csch_cgrp_t *grp, const char *key);
+	void (*update)(csch_cgrp_t *grp);
+	void (*gui_edit)(csch_cgrp_t *grp);
+} csch_extobj_impl_t;
+
+void csch_extobj_impl_reg(const csch_extobj_impl_t *impl);
+void csch_extobj_impl_unreg(const csch_extobj_impl_t *impl);
+
+
+
+/* internal, do not call */
+void csch_extobj_init(void);
+void csch_extobj_uninit(void);