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diff --git a/src/live_effects/parameter/scalararray.h b/src/live_effects/parameter/scalararray.h
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+++ b/src/live_effects/parameter/scalararray.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef INKSCAPE_LIVEPATHEFFECT_PARAMETER_SCALARARRAY_H
+#define INKSCAPE_LIVEPATHEFFECT_PARAMETER_SCALARARRAY_H
+
+/*
+ * Inkscape::LivePathEffectParameters
+ *
+ * Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+
+#include <glib.h>
+#include "live_effects/lpeobject.h"
+#include "live_effects/effect.h"
+#include "live_effects/parameter/array.h"
+#include "live_effects/parameter/parameter.h"
+
+namespace Inkscape {
+
+namespace LivePathEffect {
+
+class ScalarArrayParam : public ArrayParam<double> {
+public:
+    ScalarArrayParam( const Glib::ustring& label,
+                const Glib::ustring& tip,
+                const Glib::ustring& key,
+                Inkscape::UI::Widget::Registry* wr,
+                Effect* effect,
+                double default_value = 0.0,
+                bool visible = true,
+                size_t n = 0);
+
+    ~ScalarArrayParam() override;
+
+    Gtk::Widget *param_newWidget() override;
+    void param_setActive(size_t index) {
+        _active_index = index;
+        param_effect->refresh_widgets = true;
+    }
+    Glib::ustring param_getDefaultSVGValue() const override;
+    void param_set_default() override;
+    void param_update_default(gdouble default_value);
+    void param_update_default(const gchar *default_value) override;
+    void param_make_integer(bool yes = true);
+    void param_set_range(gdouble min, gdouble max);
+    void param_set_digits(unsigned digits);
+    void param_set_increments(double step, double page);
+    void addSlider(bool add_slider_widget) { add_slider = add_slider_widget; };
+    void on_value_changed(Inkscape::UI::Widget::RegisteredScalar *rsu);
+    double param_get_max() { return max; };
+    double param_get_min() { return min; };
+    void param_set_undo(bool set_undo);
+    ParamType paramType() const override { return ParamType::SCALAR_ARRAY; };
+protected:
+    friend class LPETaperStroke;
+private:
+    size_t _active_index = 0;
+    gdouble min;
+    gdouble max;
+    bool integer;
+    unsigned digits;
+    double inc_step;
+    double inc_page;
+    bool add_slider;
+    bool _set_undo;
+    double defvalue;
+    ScalarArrayParam(const ScalarArrayParam &) = delete;
+    ScalarArrayParam &operator=(const ScalarArrayParam &) = delete;
+};
+
+
+} //namespace LivePathEffect
+
+} //namespace Inkscape
+
+#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 :