2 files changed, 8 insertions, 1 deletions
diff --git a/src/live_effects/parameter/parameter.cpp b/src/live_effects/parameter/parameter.cpp
index 5454a5408..cc8982860 100644
--- a/src/live_effects/parameter/parameter.cpp
+++ b/src/live_effects/parameter/parameter.cpp
@@ -58,7 +58,8 @@ ScalarParam::ScalarParam( const Glib::ustring& label, const Glib::ustring& tip,
       defvalue(default_value),
       digits(2),
       inc_step(0.1),
-      inc_page(1)
+      inc_page(1),
+      add_slider(false)
 {
 }
 
@@ -134,6 +135,9 @@ ScalarParam::param_newWidget(Gtk::Tooltips * /*tooltips*/)
     rsu->setIncrements(inc_step, inc_page);
     rsu->setRange(min, max);
     rsu->setProgrammatically = false;
+    if (add_slider) {
+        rsu->addSlider();
+    }
 
     rsu->set_undo_parameters(SP_VERB_DIALOG_LIVE_PATH_EFFECT, _("Change scalar parameter"));
 
diff --git a/src/live_effects/parameter/parameter.h b/src/live_effects/parameter/parameter.h
index cee10bc70..fe93e8dca 100644
--- a/src/live_effects/parameter/parameter.h
+++ b/src/live_effects/parameter/parameter.h
@@ -109,6 +109,8 @@ public:
     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; };
+
     virtual Gtk::Widget * param_newWidget(Gtk::Tooltips * tooltips);
 
     inline operator gdouble()
@@ -123,6 +125,7 @@ protected:
     unsigned digits;
     double inc_step;
     double inc_page;
+    bool add_slider;
 
 private:
     ScalarParam(const ScalarParam&);