diff --git a/Polyhedron/demo/Polyhedron/Io_implicit_function_plugin.cpp b/Polyhedron/demo/Polyhedron/Io_implicit_function_plugin.cpp
index 7843cee826f..eed51138917 100644
--- a/Polyhedron/demo/Polyhedron/Io_implicit_function_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Io_implicit_function_plugin.cpp
@@ -54,7 +54,7 @@ public:
   Io_implicit_function_plugin();
   virtual ~Io_implicit_function_plugin() {}
 
-  bool applicable() const { return true; }
+  bool applicable(QAction*) const { return true; }
 
   QString name() const { return "implicit functions"; }
   // QString nameFilters() const { return ""; }
diff --git a/Polyhedron/demo/Polyhedron/MainWindow.cpp b/Polyhedron/demo/Polyhedron/MainWindow.cpp
index 4e9406d2366..9da72a7519a 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow.cpp
@@ -340,14 +340,8 @@ MainWindow::MainWindow(QWidget* parent)
 void MainWindow::filterOperations()
 {
   Q_FOREACH(const PluginNamePair& p, plugins) {
-    if(p.first->applicable()) {
-      Q_FOREACH(QAction* action, p.first->actions()) {
-        action->setVisible(true);
-      }
-    } else {
-      Q_FOREACH(QAction* action, p.first->actions()) {
-        action->setVisible(false);
-      }
+    Q_FOREACH(QAction* action, p.first->actions()) {
+        action->setVisible( p.first->applicable(action) );
     }
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_camera_positions_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_camera_positions_plugin.cpp
index c1a41e8e354..d78b5079c8f 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_camera_positions_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_camera_positions_plugin.cpp
@@ -26,7 +26,7 @@ public:
 
   bool canSave(const Scene_item*) { return false; }
   bool save(const Scene_item*, QFileInfo ) {return false; }
-  bool applicable() const {return false;}
+  bool applicable(QAction*) const {return false;}
 private:
   Camera_positions_list* cpl;
 };
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_convex_hull_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_convex_hull_plugin.cpp
index 07fc6cb5012..c0f91fcd42d 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_convex_hull_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_convex_hull_plugin.cpp
@@ -29,7 +29,7 @@ public:
     return QStringList() << "actionConvexHull";
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return 
       qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex())) ||
       qobject_cast<Scene_polylines_item*>(scene->item(scene->mainSelectionIndex())) ||
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_corefinement_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_corefinement_plugin.cpp
index 7c73d4ec92d..242d113d898 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_corefinement_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_corefinement_plugin.cpp
@@ -28,7 +28,7 @@ class Polyhedron_demo_corefinement_plugin :
 
 public:
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_cut_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_cut_plugin.cpp
index 62dc22469e3..ec98cb56588 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_cut_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_cut_plugin.cpp
@@ -172,7 +172,7 @@ public:
   
   virtual ~Polyhedron_demo_cut_plugin();
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     // returns true if one polyhedron is in the entries
     for (int i=0; i< scene->numberOfEntries(); ++i)
     {
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_edit_polyhedron_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_edit_polyhedron_plugin.cpp
index d27c8efa5ee..9a256f53a9f 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_edit_polyhedron_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_edit_polyhedron_plugin.cpp
@@ -26,7 +26,7 @@ public:
 
   void init(QMainWindow* mainWindow, Scene_interface* scene_interface);
   QList<QAction*> actions() const;
-  bool applicable() const;
+  bool applicable(QAction*) const;
 
 public slots:
   void on_actionDeformation_triggered();
@@ -69,7 +69,7 @@ private:
 QList<QAction*> Polyhedron_demo_edit_polyhedron_plugin::actions() const {
   return QList<QAction*>() << actionDeformation;
 }
-bool Polyhedron_demo_edit_polyhedron_plugin::applicable() const { 
+bool Polyhedron_demo_edit_polyhedron_plugin::applicable(QAction*) const { 
   Q_FOREACH(Scene_interface::Item_id i, scene->selectionIndices())
   {
     if(qobject_cast<Scene_polyhedron_item*>(scene->item(i)) 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_inside_out_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_inside_out_plugin.cpp
index 25469ebef8a..ef86455fa47 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_inside_out_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_inside_out_plugin.cpp
@@ -22,7 +22,7 @@ public:
     return QStringList() << "actionInsideOut";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     const Scene_interface::Item_id index = scene->mainSelectionIndex();
     return qobject_cast<Scene_polyhedron_item*>(scene->item(index)) 
       || qobject_cast<Scene_polygon_soup_item*>(scene->item(index));
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_intersection_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_intersection_plugin.cpp
index 42d952df9bb..79c04e5259b 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_intersection_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_intersection_plugin.cpp
@@ -33,7 +33,7 @@ class Polyhedron_demo_intersection_plugin :
 
 public:
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_jet_fitting_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_jet_fitting_plugin.cpp
index a985d8a937a..24dbe6bb254 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_jet_fitting_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_jet_fitting_plugin.cpp
@@ -25,7 +25,7 @@ public:
     return QStringList() << "actionEstimateCurvature";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
index 68fb6316288..ec4d38cd559 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
@@ -37,7 +37,7 @@ public:
     Polyhedron_demo_plugin_helper::init(mainWindow, scene_interface);
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     Q_FOREACH(int index, scene->selectionIndices())
     {
       if ( qobject_cast<Scene_polyhedron_item*>(scene->item(index)) )
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_kernel_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_kernel_plugin.cpp
index eacc0d2b8a0..e5bf8357450 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_kernel_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_kernel_plugin.cpp
@@ -37,7 +37,7 @@ public:
     return QStringList() << "actionKernel";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_3_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_3_plugin.cpp
index c37865a9bc1..fb36761e628 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_3_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_3_plugin.cpp
@@ -47,7 +47,7 @@ public:
     return QList<QAction*>() << actionMesh_3;
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 public slots:
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_segmentation_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_segmentation_plugin.cpp
index 9f1ea88fba1..2a03de8c432 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_segmentation_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_segmentation_plugin.cpp
@@ -57,7 +57,7 @@ public:
         return QList<QAction*>() << actionSegmentation;
     }
 
-    bool applicable() const {
+    bool applicable(QAction*) const {
       return 
         qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
     }    
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_simplification_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_simplification_plugin.cpp
index e6881669c49..a5c6e67d293 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_simplification_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_mesh_simplification_plugin.cpp
@@ -26,7 +26,7 @@ public:
     return QStringList() << "actionSimplify";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 public slots:
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_nef_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_nef_plugin.cpp
index c2da2c8f1e4..d67bd490d98 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_nef_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_nef_plugin.cpp
@@ -30,7 +30,7 @@ public:
                          << "actionMinkowskiSum";
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     const int indexA = scene->selectionAindex();
     const int indexB = scene->selectionBindex();
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_normal_estimation_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_normal_estimation_plugin.cpp
index 48ccec330e8..dc5b2502fa6 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_normal_estimation_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_normal_estimation_plugin.cpp
@@ -50,7 +50,7 @@ public:
     return QList<QAction*>() << actionNormalEstimation << actionNormalInversion;
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
 #if CGAL_DISABLE_NORMAL_ESTIMATION_PLUGIN
     return false;
 #else
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
index 7ce9e84c45a..f84cc31aae8 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
@@ -23,10 +23,14 @@ public:
             Scene_interface* scene_interface,
             Messages_interface* m);
 
-  bool applicable() const {
+  bool applicable(QAction* action) const {
     Q_FOREACH(Scene_interface::Item_id index, scene->selectionIndices()) {
       if(qobject_cast<Scene_polygon_soup_item*>(scene->item(index)))
         return true;
+      else
+        if (action==actionShuffle && 
+            qobject_cast<Scene_polyhedron_item*>(scene->item(index)))
+            return true;
     }
     return false;
   }
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_parameterization_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_parameterization_plugin.cpp
index 8a3855285b5..8b3d53e2718 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_parameterization_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_parameterization_plugin.cpp
@@ -37,7 +37,7 @@ public:
                          << "actionDCP";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_pca_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_pca_plugin.cpp
index b7af60450a6..751bf7d6453 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_pca_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_pca_plugin.cpp
@@ -38,7 +38,7 @@ public:
                          << "actionFitLine";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_plugin_interface.h b/Polyhedron/demo/Polyhedron/Polyhedron_demo_plugin_interface.h
index 8f0bd1b553d..1e2628ba97c 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_plugin_interface.h
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_plugin_interface.h
@@ -26,7 +26,7 @@ public:
   //!
   //! @returns \c true, if the plugin is applicable, \c false
   //! otherwise
-  virtual bool applicable() const = 0;
+  virtual bool applicable(QAction*) const = 0;
   virtual QList<QAction*> actions() const = 0;
 };
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_inside_polyhedron_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_inside_polyhedron_plugin.cpp
index e5e32426cdf..3da1a232839 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_inside_polyhedron_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_inside_polyhedron_plugin.cpp
@@ -36,7 +36,7 @@ class Polyhedron_demo_point_inside_polyhedron_plugin :
   Q_INTERFACES(Polyhedron_demo_plugin_interface)
 
 public:
-  bool applicable() const 
+  bool applicable(QAction*) const 
   {
     bool poly_item_exists = false;
     bool point_item_exists = false;
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_average_spacing_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_average_spacing_plugin.cpp
index 1473fd0fa62..1faac876543 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_average_spacing_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_average_spacing_plugin.cpp
@@ -39,7 +39,7 @@ public:
   
   //! Applicable if the currently selected item is a
   //! points_with_normal_item.
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_outliers_removal_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_outliers_removal_plugin.cpp
index e827a4776d1..1a8130fb553 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_outliers_removal_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_outliers_removal_plugin.cpp
@@ -36,7 +36,7 @@ public:
   }
   
   //! Applicate for Point_sets with normals.
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_simplification_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_simplification_plugin.cpp
index 38aed1a8f79..81619adce96 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_simplification_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_simplification_plugin.cpp
@@ -34,7 +34,7 @@ public:
     Polyhedron_demo_plugin_helper::init(mainWindow, scene_interface);
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_smoothing_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_smoothing_plugin.cpp
index b88a73e59f2..bb6001e6390 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_smoothing_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_point_set_smoothing_plugin.cpp
@@ -32,7 +32,7 @@ public:
     return QList<QAction*>() << actionJetSmoothing;
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_poisson_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_poisson_plugin.cpp
index 5fcd45ddeda..9f0926a4b32 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_poisson_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_poisson_plugin.cpp
@@ -40,7 +40,7 @@ public:
   }
 
   //! Applicate for Point_sets with normals.
-  bool applicable() const {
+  bool applicable(QAction*) const {
     Scene_points_with_normal_item* item =
       qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
     return item && item->has_normals();
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_slicer_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_slicer_plugin.cpp
index 6697ab9a5e8..4a139ee8ef3 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_slicer_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_slicer_plugin.cpp
@@ -35,7 +35,7 @@ class Polyhedron_demo_polyhedron_slicer_plugin :
   Q_INTERFACES(Polyhedron_demo_plugin_interface)
 
 public:
-  bool applicable() const { return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex())); }
+  bool applicable(QAction*) const { return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex())); }
   void print_message(QString message) { messages->information(message);}
 
   void init(QMainWindow* mainWindow, Scene_interface* scene_interface, Messages_interface* m);
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_stitching_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_stitching_plugin.cpp
index 553520e4528..c6b90c21a39 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_stitching_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_polyhedron_stitching_plugin.cpp
@@ -50,7 +50,7 @@ public:
     Polyhedron_demo_plugin_helper::init(mainWindow, scene_interface);
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     Q_FOREACH(int index, scene->selectionIndices())
     {
       if ( qobject_cast<Scene_polyhedron_item*>(scene->item(index)) )
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_remeshing_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_remeshing_plugin.cpp
index 88b1172f1bb..03e903f8efe 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_remeshing_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_remeshing_plugin.cpp
@@ -39,7 +39,7 @@ public:
     }
   }
 
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_scale_space_reconstruction_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_scale_space_reconstruction_plugin.cpp
index a824fe690f3..34c2ed33518 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_scale_space_reconstruction_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_scale_space_reconstruction_plugin.cpp
@@ -50,7 +50,7 @@ public:
   }
 
   //! Applicate for Point_sets with normals.
-  bool applicable() const {
+  bool applicable(QAction*) const {
     return qobject_cast<Scene_points_with_normal_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_selection_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_selection_plugin.cpp
index 6993b50d879..320871dd063 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_selection_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_selection_plugin.cpp
@@ -24,7 +24,7 @@ class Polyhedron_demo_selection_plugin :
     Q_INTERFACES(Polyhedron_demo_plugin_interface)
 
 public:
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()))
         || qobject_cast<Scene_polyhedron_selection_item*>(scene->item(scene->mainSelectionIndex())); 
   }
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_self_intersection_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_self_intersection_plugin.cpp
index e69beea7897..a9edbb6413f 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_self_intersection_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_self_intersection_plugin.cpp
@@ -30,7 +30,7 @@ public:
     return QStringList() << "actionSelfIntersection";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_subdivision_methods_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_subdivision_methods_plugin.cpp
index b5a3b4eac6c..4bf357255f6 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_subdivision_methods_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_subdivision_methods_plugin.cpp
@@ -23,7 +23,7 @@ public:
                          << "actionSqrt3";
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex()));
   }
 public slots:
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_transform_polyhedron_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_transform_polyhedron_plugin.cpp
index a2585d5080c..408ef6c9859 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_transform_polyhedron_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_transform_polyhedron_plugin.cpp
@@ -30,7 +30,7 @@ public:
     return QList<QAction*>() << actionTransformPolyhedron;
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return qobject_cast<Scene_polyhedron_item*>(scene->item(scene->mainSelectionIndex())) ||
            qobject_cast<Scene_polyhedron_transform_item*>(scene->item(scene->mainSelectionIndex()));
   }
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_triangulate_facets_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_triangulate_facets_plugin.cpp
index 89833af3130..e84e76730f3 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_triangulate_facets_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_triangulate_facets_plugin.cpp
@@ -44,7 +44,7 @@ public:
                              << actionUnTriangulateFacets;
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     Q_FOREACH(Scene_interface::Item_id index, scene->selectionIndices())  {
       Scene_polyhedron_item* item = qobject_cast<Scene_polyhedron_item*>(scene->item(index));
       if(!item) return false;
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_trivial_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_trivial_plugin.cpp
index 03b4c6de85d..8bed5d1ad8e 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_trivial_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_trivial_plugin.cpp
@@ -103,7 +103,7 @@ public:
     return QList<QAction*>() << actionBbox; 
   }
 
-  bool applicable() const { 
+  bool applicable(QAction*) const { 
     return true;
   }
 public slots: