Selection_items keep displaying their polyhedron_items ids and zoomToId doesn't override the sceneCenterPoint anymore.

Polyhedron/demo/Polyhedron/Scene.cpp

@@ -1174,7 +1174,7 @@ void Scene::printVertexIds(CGAL::Three::Viewer_interface* viewer)
   Scene_item *it = item(mainSelectionIndex());
   if(it)
   {
-    Scene_print_item_interface* item= dynamic_cast<Scene_print_item_interface*>(it);
+    Scene_print_item_interface* item= qobject_cast<Scene_print_item_interface*>(it);
     if(item)
       item->printVertexIds(viewer);
   }
@@ -1186,7 +1186,7 @@ void Scene::printEdgeIds(CGAL::Three::Viewer_interface* viewer)
   if(it)
   {
     //Only call printEdgeIds if the item is a Scene_print_item_interface
-    Scene_print_item_interface* item= dynamic_cast<Scene_print_item_interface*>(it);
+    Scene_print_item_interface* item= qobject_cast<Scene_print_item_interface*>(it);
     if(item)
       item->printEdgeIds(viewer);
   }
@@ -1198,7 +1198,7 @@ void Scene::printFaceIds(CGAL::Three::Viewer_interface* viewer)
   if(it)
   {
     //Only call printFaceIds if the item is a Scene_print_item_interface
-    Scene_print_item_interface* item= dynamic_cast<Scene_print_item_interface*>(it);
+    Scene_print_item_interface* item= qobject_cast<Scene_print_item_interface*>(it);
     if(item)
       item->printFaceIds(viewer);
   }
@@ -1210,7 +1210,7 @@ void Scene::printAllIds(CGAL::Three::Viewer_interface* viewer)
   if(it)
   {
     //Only call printFaceIds if the item is a Scene_print_item_interface
-    Scene_print_item_interface* item= dynamic_cast<Scene_print_item_interface*>(it);
+    Scene_print_item_interface* item= qobject_cast<Scene_print_item_interface*>(it);
     if(item)
       item->printAllIds(viewer);
   }
@@ -1219,7 +1219,7 @@ void Scene::updatePrimitiveIds(CGAL::Three::Viewer_interface* viewer, CGAL::Thre
 {
   if(it)
   {
-    Scene_print_item_interface* item= dynamic_cast<Scene_print_item_interface*>(it);
+    Scene_print_item_interface* item= qobject_cast<Scene_print_item_interface*>(it);
     if(item)
     {
       //As this function works as a toggle, the first call hides the ids and the second one shows them again,

Polyhedron/demo/Polyhedron/Scene_polyhedron_item.cpp

@@ -2421,9 +2421,15 @@ void Scene_polyhedron_item::zoomToId()
             viewer->camera()->position().z - viewer->camera()->sceneCenter().z)
           .norm() * normal ;
 
-      viewer->camera()->setSceneCenter(qglviewer::Vec(p.x(),
+#if QGLVIEWER_VERSION >= 0x020502
+      viewer->camera()->setPivotPoint(qglviewer::Vec(p.x(),
                                                              p.y(),
                                                       p.z()));
+#else
+      viewer->camera()->setRevolveAroundPoint(qglviewer::Vec(p.x(),
+                                                             p.y(),
+                                                      p.z()));
+#endif
 
       viewer->moveCameraToCoordinates(QString("%1 %2 %3 %4 %5 %6 %7").arg(new_pos.x())
                                       .arg(new_pos.y())
@@ -2435,3 +2441,7 @@ void Scene_polyhedron_item::zoomToId()
     }
   }
 }
+bool Scene_polyhedron_item::shouldDisplayIds(CGAL::Three::Scene_item *current_item) const
+{
+  return this == current_item;
+}

Polyhedron/demo/Polyhedron/Scene_polyhedron_item.h

@@ -137,6 +137,7 @@ public:
     bool printEdgeIds(CGAL::Three::Viewer_interface*)const Q_DECL_OVERRIDE;
     bool printFaceIds(CGAL::Three::Viewer_interface*)const Q_DECL_OVERRIDE;
     void printAllIds(CGAL::Three::Viewer_interface*) Q_DECL_OVERRIDE;
+    bool shouldDisplayIds(CGAL::Three::Scene_item *current_item) const Q_DECL_OVERRIDE;
     bool testDisplayId(double x, double y, double z, CGAL::Three::Viewer_interface*)const Q_DECL_OVERRIDE;
 
 

Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.cpp

@@ -2207,3 +2207,52 @@ void Scene_polyhedron_selection_item::selection_changed(bool b)
     viewer->setNoBinding();
   }
 }
+
+void Scene_polyhedron_selection_item::printPrimitiveId(QPoint p, CGAL::Three::Viewer_interface* viewer)
+{
+#ifndef USE_SURFACE_MESH
+  d->item->polyhedron_item()->printPrimitiveId(p, viewer);
+#endif
+}
+bool Scene_polyhedron_selection_item::printVertexIds(CGAL::Three::Viewer_interface* viewer) const
+{
+#ifndef USE_SURFACE_MESH
+  return d->item->polyhedron_item()->printVertexIds(viewer);
+#endif
+  return false;
+}
+bool Scene_polyhedron_selection_item::printEdgeIds(CGAL::Three::Viewer_interface* viewer) const
+{
+#ifndef USE_SURFACE_MESH
+  d->item->polyhedron_item()->printEdgeIds(viewer);
+#endif
+  return false;
+}
+bool Scene_polyhedron_selection_item::printFaceIds(CGAL::Three::Viewer_interface* viewer) const
+{
+#ifndef USE_SURFACE_MESH
+  return d->item->polyhedron_item()->printFaceIds(viewer);
+#endif
+  return false;
+}
+void Scene_polyhedron_selection_item::printAllIds(CGAL::Three::Viewer_interface* viewer)
+{
+#ifndef USE_SURFACE_MESH
+  d->item->polyhedron_item()->printAllIds(viewer);
+#endif
+}
+bool Scene_polyhedron_selection_item::testDisplayId(double x, double y, double z, CGAL::Three::Viewer_interface* viewer)const
+{
+#ifndef USE_SURFACE_MESH
+  return d->item->polyhedron_item()->testDisplayId(x, y, z, viewer);
+#endif
+  return false;
+}
+
+bool Scene_polyhedron_selection_item::shouldDisplayIds(CGAL::Three::Scene_item *current_item) const
+{
+#ifndef USE_SURFACE_MESH
+  return d->item->polyhedron_item() == current_item;
+#endif
+  return false;
+}

Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h

@@ -17,6 +17,8 @@
 #include <CGAL/Polygon_mesh_processing/orient_polygon_soup.h>
 #include <CGAL/Polygon_mesh_processing/polygon_soup_to_polygon_mesh.h>
 #include <CGAL/Polygon_mesh_processing/connected_components.h>
+#include <CGAL/Three/Scene_print_item_interface.h>
+
 #include "Polyhedron_demo_detect_sharp_edges.h"
 
 // Laurent Rineau, 2016/04/07: that header should not be included here, but
@@ -201,9 +203,12 @@ struct Selection_traits<typename SelectionItem::fg_edge_descriptor, SelectionIte
 //////////////////////////////////////////////////////////////////////////
 struct Scene_polyhedron_selection_item_priv;
 class SCENE_POLYHEDRON_SELECTION_ITEM_EXPORT Scene_polyhedron_selection_item 
-  : public Scene_polyhedron_item_decorator
+  : public Scene_polyhedron_item_decorator,
+    public CGAL::Three::Scene_print_item_interface
 {
   Q_OBJECT
+  Q_INTERFACES(CGAL::Three::Scene_print_item_interface)
+  Q_PLUGIN_METADATA(IID "com.geometryfactory.PolyhedronDemo.PrintInterface/1.0")
 
 friend class Polyhedron_demo_selection_plugin;
 
@@ -220,6 +225,14 @@ public:
   ~Scene_polyhedron_selection_item();
   void inverse_selection();
   void setPathSelection(bool b);
+  //For ID printing
+  void printPrimitiveId(QPoint, CGAL::Three::Viewer_interface*);
+  bool printVertexIds(CGAL::Three::Viewer_interface*) const;
+  bool printEdgeIds(CGAL::Three::Viewer_interface*) const;
+  bool printFaceIds(CGAL::Three::Viewer_interface*) const;
+  void printAllIds(CGAL::Three::Viewer_interface*);
+  bool testDisplayId(double, double, double, CGAL::Three::Viewer_interface*)const;
+  bool shouldDisplayIds(CGAL::Three::Scene_item *current_item) const;
 
 protected: 
   void init(Scene_face_graph_item* poly_item, QMainWindow* mw);

Polyhedron/demo/Polyhedron/TextRenderer.cpp

@@ -1,5 +1,7 @@
 #include <CGAL/Three/TextRenderer.h>
 #include <CGAL/Three/Scene_item.h>
+#include <CGAL/Three/Scene_print_item_interface.h>
+#include "Scene_polyhedron_selection_item.h"
 void TextRenderer::draw(CGAL::Three::Viewer_interface *viewer)
 {
     QPainter *painter = viewer->getPainter();
@@ -9,7 +11,12 @@ void TextRenderer::draw(CGAL::Three::Viewer_interface *viewer)
     qglviewer::Camera* camera = viewer->camera();
     //Display the items textItems
     Q_FOREACH(TextListItem* list, textItems)
-      if(list->item() == scene->item(scene->mainSelectionIndex()))
+    {
+      CGAL::Three::Scene_print_item_interface* item =
+      qobject_cast<CGAL::Three::Scene_print_item_interface*>(scene->item(scene->mainSelectionIndex()));
+      if( item &&
+          item->shouldDisplayIds(list->item())
+         )
         Q_FOREACH(TextItem* item, list->textList())
         {
           qglviewer::Vec src(item->position().x(), item->position().y(),item->position().z());
@@ -31,6 +38,7 @@ void TextRenderer::draw(CGAL::Three::Viewer_interface *viewer)
             painter->drawText(rect, item->text());
           }
         }
+    }
 
     //Display the local TextItems
     Q_FOREACH(TextItem* item, local_textItems)

Three/include/CGAL/Three/Scene_print_item_interface.h

@@ -27,6 +27,7 @@ namespace CGAL
 {
 namespace Three {
   class Viewer_interface;
+  class Scene_item;
 
 
 //! An item that wants to print its primitive IDs must derive from this interface.
@@ -56,6 +57,14 @@ public:
   //! \returns true if the Id should be displayed
   //! \returns false if the Id should not be displayed (if it is hidden for example)
   virtual bool testDisplayId(double, double, double, CGAL::Three::Viewer_interface*)const = 0;
+
+  //! \brief Tests if this item should display its ids.
+  //!
+  //! The default behavior is to only display ids of the currently selected item (\see mainSelectionIndex()).
+  //! This function allows to override this behavior.
+  //! @param tets_item the currently tested TextListItem.
+  //! \return true if this item should display its ids when `test_item` is tested.
+  virtual bool shouldDisplayIds(CGAL::Three::Scene_item* test_item)const = 0;
 };
 }
 }