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diff --git a/src/ui/widget/registered-enums.h b/src/ui/widget/registered-enums.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_REGISTERED_ENUMS_H
+#define INKSCAPE_UI_WIDGET_REGISTERED_ENUMS_H
+
+#include "ui/widget/combo-enums.h"
+#include "ui/widget/registered-widget.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+/**
+ * Simplified management of enumerations in the UI as combobox.
+ */
+template<typename E> class RegisteredEnum : public RegisteredWidget< LabelledComboBoxEnum<E> >
+{
+public:
+ ~RegisteredEnum() override {
+ _changed_connection.disconnect();
+ }
+
+ RegisteredEnum ( const Glib::ustring& label,
+ const Glib::ustring& tip,
+ const Glib::ustring& key,
+ const Util::EnumDataConverter<E>& c,
+ Registry& wr,
+ Inkscape::XML::Node* repr_in = nullptr,
+ SPDocument *doc_in = nullptr,
+ bool sorted = true )
+ : RegisteredWidget< LabelledComboBoxEnum<E> >(label, tip, c, (const Glib::ustring &)"", (const Glib::ustring &)"", true, sorted)
+ {
+ RegisteredWidget< LabelledComboBoxEnum<E> >::init_parent(key, wr, repr_in, doc_in);
+ _changed_connection = combobox()->signal_changed().connect (sigc::mem_fun (*this, &RegisteredEnum::on_changed));
+ }
+
+ void set_active_by_id (E id) {
+ combobox()->set_active_by_id(id);
+ };
+
+ void set_active_by_key (const Glib::ustring& key) {
+ combobox()->set_active_by_key(key);
+ }
+
+ inline const Util::EnumData<E>* get_active_data() {
+ combobox()->get_active_data();
+ }
+
+ ComboBoxEnum<E> * combobox() {
+ return LabelledComboBoxEnum<E>::getCombobox();
+ }
+
+ sigc::connection _changed_connection;
+
+protected:
+ void on_changed() {
+ if (combobox()->setProgrammatically) {
+ combobox()->setProgrammatically = false;
+ return;
+ }
+
+ if (RegisteredWidget< LabelledComboBoxEnum<E> >::_wr->isUpdating())
+ return;
+
+ RegisteredWidget< LabelledComboBoxEnum<E> >::_wr->setUpdating (true);
+
+ const Util::EnumData<E>* data = combobox()->get_active_data();
+ if (data) {
+ RegisteredWidget< LabelledComboBoxEnum<E> >::write_to_xml(data->key.c_str());
+ }
+
+ RegisteredWidget< LabelledComboBoxEnum<E> >::_wr->setUpdating (false);
+ }
+};
+
+}
+}
+}
+
+#endif
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :