geom/src/GEOMGUI/GEOM_Displayer.cxx

//  GEOM GEOMGUI : GUI for Geometry component
//
//  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
//  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
//  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
//
//
//
//  File   : GEOM_Displayer.cxx
//  Author : Vadim SANDLER
//  Module : GEOM
//  $Header$

#include "GEOM_Displayer.h"

#include "GeometryGUI.h"

#include "GEOM_TypeFilter.h"
#include "GEOM_EdgeFilter.h"
#include "GEOM_FaceFilter.h"
#include "GEOM_PreviewFilter.h"
#include "GEOM_LogicalFilter.h"
#include "GEOM_OCCFilter.h"

#include "GEOM_Actor.h"
#include "GEOM_AssemblyBuilder.h"
#include "GEOM_AISShape.hxx"
#include "GEOM_AISTrihedron.hxx"
#include "GEOM_VTKTrihedron.hxx"

#include <SUIT_Desktop.h>
#include <SUIT_ViewWindow.h>
#include <SUIT_Session.h>
#include <SUIT_Tools.h>
#include <SUIT_ViewManager.h>

#include <SalomeApp_Study.h>
#include <SalomeApp_Application.h>
#include <LightApp_SelectionMgr.h>
#include <SalomeApp_TypeFilter.h>
#include <SalomeApp_Tools.h>

#include <SALOME_ListIteratorOfListIO.hxx>

#include <SOCC_Prs.h>
#include <SOCC_ViewModel.h>

#include <SVTK_Prs.h>
#include <SVTK_ViewModel.h>

#include <SALOMEDSClient.hxx>
#include <SALOMEDSClient_SObject.hxx>

// OCCT Includes
#include <AIS_Drawer.hxx>
#include <AIS_ListIteratorOfListOfInteractive.hxx>
#include <Prs3d_PointAspect.hxx>
#include <Graphic3d_AspectMarker3d.hxx>
#include <StdSelect_TypeOfEdge.hxx>
#include <StdSelect_TypeOfFace.hxx>
#include <TopoDS_Face.hxx>
#include <BRep_Tool.hxx>
#include <Geom_Plane.hxx>
#include <Geom_Axis2Placement.hxx>
#include <gp_Pln.hxx>
#include <TColStd_MapOfInteger.hxx>
#include <TColStd_MapIteratorOfMapOfInteger.hxx>

// VTK Includes
#include <vtkActorCollection.h>

// STL Includes
#include <cstring>

// CORBA Headers
#include CORBA_CLIENT_HEADER(SALOMEDS_Attributes)

#include "GEOMImpl_Types.hxx"

using namespace std;

//================================================================
// Function : getActiveStudy
// Purpose  : Get active study, returns 0 if no open study frame
//================================================================
static inline SalomeApp_Study* getActiveStudy()
{
  SUIT_Session* session = SUIT_Session::session();
  SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( session->activeApplication() );
  if ( app )
    return ( SalomeApp_Study* )app->activeStudy();
  return 0;
}

//================================================================
// Function : getTopAbsMode
// Purpose  : Get TopAbs_ShapeEnum value corresponding to the
//            one from GEOMImpl_Types.h
//================================================================
static inline int getTopAbsMode( const int implType )
{
  switch ( implType )
  {
    case GEOM_COMPOUND  : return TopAbs_COMPOUND;
    case GEOM_SOLID     : return TopAbs_SOLID;
    case GEOM_SHELL     : return TopAbs_SHELL;
    case GEOM_FACE      : return TopAbs_FACE;
    case GEOM_WIRE      : return TopAbs_WIRE;
    case GEOM_EDGE      : return TopAbs_EDGE;
    case GEOM_POINT     : return TopAbs_VERTEX;
    default             : return -1;
  }
}

//================================================================
// Function : getFilter
// Purpose  : Get filter corresponding to the type of object
//            from GEOMImpl_Types.h
//================================================================
SUIT_SelectionFilter* GEOM_Displayer::getFilter( const int theMode )
{
  SUIT_SelectionFilter* aFilter;

  int aTopAbsMode = getTopAbsMode( theMode );
  if ( aTopAbsMode != -1 )
    aFilter = new GEOM_TypeFilter( getStudy(), aTopAbsMode, true ); //@ aFilter = new GEOM_TypeFilter( ( TopAbs_ShapeEnum )aTopAbsMode );
  else
    switch ( theMode )
      {
      case GEOM_LINE      : aFilter = new GEOM_EdgeFilter( getStudy(), StdSelect_Line ); break;
      case GEOM_CIRCLE    : aFilter = new GEOM_EdgeFilter( getStudy(), StdSelect_Circle ); break;

      case GEOM_PLANE     : aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Plane ); break;
      case GEOM_CYLINDER  : aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Cylinder ); break;
      case GEOM_SPHERE    : aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Sphere ); break;
      case GEOM_TORUS     : aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Torus ); break;
      case GEOM_REVOLUTION: aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Revol ); break;
      case GEOM_CONE      : aFilter = new GEOM_FaceFilter( getStudy(), StdSelect_Cone ); break;

      case GEOM_PREVIEW   : aFilter = new GEOM_PreviewFilter( getStudy() ); break;

      case GEOM_ALLSHAPES : aFilter = new GEOM_SelectionFilter(getStudy(), true ); break;
      case GEOM_ALLGEOM   : aFilter = new SalomeApp_TypeFilter( getStudy(), "GEOM" ); break;

      default             : aFilter = new GEOM_TypeFilter( getStudy(), theMode ); break;
      }

  return aFilter;
}

//================================================================
// Function : getEntry
// Purpose  :
//================================================================
static string getEntry( GEOM::GEOM_Object_ptr object )
{
  SUIT_Session* session = SUIT_Session::session();
  SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( session->activeApplication() );
  if ( app )
  {
    string IOR = app->orb()->object_to_string( object );
    if ( IOR != "" )
    {
      SalomeApp_Study* study = ( SalomeApp_Study* )app->activeStudy();
      _PTR(SObject) SO ( study->studyDS()->FindObjectIOR( IOR ) );
      if ( SO )
	return SO->GetID();
    }
  }
  return "";
}

//================================================================
// Function : getName
// Purpose  :
//================================================================
static string getName( GEOM::GEOM_Object_ptr object )
{
  SUIT_Session* session = SUIT_Session::session();
  SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( session->activeApplication() );
  if ( app )
  {
    string IOR = app->orb()->object_to_string( object );
    if ( IOR != "" )
    {
      SalomeApp_Study* study = ( SalomeApp_Study* )app->activeStudy();
      _PTR(SObject) aSObj ( study->studyDS()->FindObjectIOR( IOR ) );

      _PTR(GenericAttribute) anAttr;

      if ( aSObj && aSObj->FindAttribute( anAttr, "AttributeName") )
      {
        _PTR(AttributeName) aNameAttr( anAttr );
        return aNameAttr->Value();
      }
    }
  }

  return "";
}

//=================================================================
/*!
 *  GEOM_Displayer::GEOM_Displayer
 *  Constructor
 */
//=================================================================
GEOM_Displayer::GEOM_Displayer( SalomeApp_Study* study )
{
  myStudy = study;

  /* Shading Color */
  SUIT_Session* session = SUIT_Session::session();
  SUIT_ResourceMgr* resMgr = session->resourceMgr();

  QColor col = resMgr->colorValue( "Geometry", "shading_color", QColor( 255, 0, 0 ) );
  myShadingColor = SalomeApp_Tools::color( col );

  myDisplayMode = resMgr->integerValue("Geometry", "display_mode", 0);

  myColor = -1;
  // This color is used for shape displaying. If it is equal -1 then
  // default color is used.

  myWidth = -1;
  myType = -1;

  myToActivate = true;
  // This parameter is used for activisation/deactivisation of objects to be displayed

  myViewFrame = 0;
}

//=================================================================
/*!
 *  GEOM_Displayer::~GEOM_Displayer
 *  Destructor
 */
//=================================================================
GEOM_Displayer::~GEOM_Displayer()
{
}

//=================================================================
/*!
 *  GEOM_Displayer::Display
 *  Display interactive object in the current viewer
 */
//=================================================================
void GEOM_Displayer::Display( const Handle(SALOME_InteractiveObject)& theIO,
			     const bool updateViewer,
			     SALOME_View* theViewFrame )
{
  SALOME_View* vf = theViewFrame ? theViewFrame : GetActiveView();
  if ( vf )
  {
    SALOME_Prs* prs = buildPresentation( theIO->getEntry(), vf );

    if ( prs )
    {
      vf->BeforeDisplay( this );
      vf->Display( prs );
      vf->AfterDisplay( this );

      if ( updateViewer )
        vf->Repaint();

      delete prs;  // delete presentation because displayer is its owner
    }
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Display
 *  This overloaded Display() method can be useful for operations
 *  not using dialog boxes.
 */
//=================================================================
void GEOM_Displayer::Display( GEOM::GEOM_Object_ptr theObj, const bool updateViewer )
{
  if ( theObj->_is_nil() )
    return;

  string entry = getEntry( theObj );
  if ( entry != "" ) {
    Display(new SALOME_InteractiveObject(entry.c_str(), "GEOM", getName(theObj).c_str()),
            updateViewer);
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Erase
 *  Erase interactive object in the current viewer
 */
//=================================================================
void GEOM_Displayer::Erase( const Handle(SALOME_InteractiveObject)& theIO,
                            const bool forced,
                            const bool updateViewer,
			    SALOME_View* theViewFrame )
{
  if ( theIO.IsNull() )
    return;

  SALOME_View* vf = theViewFrame ? theViewFrame : GetActiveView();

  if ( vf ) {
    SALOME_Prs* prs = vf->CreatePrs( theIO->getEntry() );
    if ( prs ) {
      vf->Erase( prs, forced );
      if ( updateViewer )
	vf->Repaint();
      delete prs;  // delete presentation because displayer is its owner
    }
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Erase
 *  Erase geometry object in the current viewer
 */
//=================================================================
void GEOM_Displayer::Erase( GEOM::GEOM_Object_ptr theObj,
                            const bool forced,
                            const bool updateViewer )
{
  string entry = getEntry( theObj );
  if ( entry != "" )
  {
    Erase(new SALOME_InteractiveObject(entry.c_str(), "GEOM", getName(theObj).c_str()),
          forced, updateViewer);
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Redisplay
 *  Redisplay (erase and then display again) interactive object
 *  in the current viewer
 */
//=================================================================
void GEOM_Displayer::Redisplay( const Handle(SALOME_InteractiveObject)& theIO,
                                const bool updateViewer )
{
  // Remove the object permanently (<forced> == true)
  SUIT_Session* ses = SUIT_Session::session();
  SUIT_Application* app = ses->activeApplication();
  if ( app )
  {
    SUIT_Desktop* desk = app->desktop();
    QPtrList<SUIT_ViewWindow> wnds = desk->windows();
    SUIT_ViewWindow* wnd;
    for ( wnd = wnds.first(); wnd; wnd = wnds.next() )
    {
      SUIT_ViewManager* vman = wnd->getViewManager();
      if ( vman )
      {
	SUIT_ViewModel* vmodel = vman->getViewModel();
	if ( vmodel )
	{
	  SALOME_View* view = dynamic_cast<SALOME_View*>(vmodel);
	  if ( view )
	  {
	    if ( view->isVisible( theIO ) || view == GetActiveView() )
	    {
	      Erase( theIO, true, false, view );
	      Display( theIO, updateViewer, view );
	    }
	  }
	}
      }
    }
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Display
 *  Calls Display() method for each object in the given list
 */
//=================================================================
void GEOM_Displayer::Display( const SALOME_ListIO& theIOList, const bool updateViewer )
{
  SALOME_ListIteratorOfListIO Iter( theIOList );
  for ( ; Iter.More(); Iter.Next() ) {
    Display( Iter.Value(), false );
  }
  if ( updateViewer )
    UpdateViewer();
}

//=================================================================
/*!
 *  GEOM_Displayer::Erase
 *  Calls Erase() method for each object in the given list
 */
//=================================================================
void GEOM_Displayer::Erase( const SALOME_ListIO& theIOList,
                            const bool forced,
                            const bool updateViewer )
{
  SALOME_ListIteratorOfListIO Iter( theIOList );
  for ( ; Iter.More(); Iter.Next() )
    Erase( Iter.Value(), forced, false );

  if ( updateViewer )
    UpdateViewer();
}

//=================================================================
/*!
 *  GEOM_Displayer::Redisplay
 *  Calls Redisplay() method for each object in the given list
 */
//=================================================================
void GEOM_Displayer::Redisplay( const SALOME_ListIO& theIOList, const bool updateViewer )
{
  SALOME_ListIteratorOfListIO Iter( theIOList );
  for ( ; Iter.More(); Iter.Next() )
    Redisplay( Iter.Value(), false );

  if ( updateViewer )
    UpdateViewer();
}

//=================================================================
/*!
 *  GEOM_Displayer::Update
 *  Update OCC presentaion
 *  [ Reimplemented from SALOME_Displayer ]
 */
//=================================================================
void GEOM_Displayer::Update( SALOME_OCCPrs* prs )
{
  SOCC_Prs* occPrs = dynamic_cast<SOCC_Prs*>( prs );
  if ( !occPrs )
    return;

  if ( myType == GEOM_MARKER && !myShape.IsNull() && myShape.ShapeType() == TopAbs_FACE )
  {
    TopoDS_Face aFace = TopoDS::Face( myShape );
    Handle(Geom_Plane) aPlane = Handle(Geom_Plane)::DownCast( BRep_Tool::Surface( aFace ) );
    if ( !aPlane.IsNull() )
    {
      gp_Ax3 aPos = aPlane->Pln().Position();
      Handle(Geom_Axis2Placement) aPlc = new Geom_Axis2Placement( aPos.Ax2() );

      Handle(GEOM_AISTrihedron) aTrh;

      if ( occPrs->IsNull() )
      {
        aTrh = new GEOM_AISTrihedron( aPlc );

        if ( HasColor() )
          aTrh->SetColor( (Quantity_NameOfColor)GetColor() );

        if ( HasWidth() )
          aTrh->SetWidth( GetWidth() );

        if ( !myIO.IsNull() )
        {
          aTrh->setIO( myIO );
          aTrh->SetOwner( myIO );
        }

        occPrs->AddObject( aTrh );
      }
      else
      {
        AIS_ListOfInteractive aList;
        occPrs->GetObjects( aList );
        AIS_ListIteratorOfListOfInteractive anIter( aList );
        for ( ; anIter.More(); anIter.Next() )
        {
          aTrh = Handle(GEOM_AISTrihedron)::DownCast( anIter.Value() );
          if ( !aTrh.IsNull() )
          {
            aTrh->SetComponent( aPlc );
            aTrh->SetToUpdate();
          }
        }
      }

      occPrs->SetToActivate( ToActivate() );
    }
  }
  else
  {
    // if presentation is empty we try to create new one
    if ( occPrs->IsNull() )
    {
      if ( !myShape.IsNull() )
      {
        Handle(GEOM_AISShape) AISShape = new GEOM_AISShape( myShape, "" );
        // Temporary staff: vertex must be infinite for correct visualization
        AISShape->SetInfiniteState( myShape.Infinite() || myShape.ShapeType() == TopAbs_VERTEX );

        // Setup shape properties here ..., e.g. display mode, color, transparency, etc
	AISShape->SetDisplayMode( myDisplayMode );
        AISShape->SetShadingColor( myShadingColor );

        if ( HasColor() )
        {
	  AISShape->SetColor( (Quantity_NameOfColor)GetColor() );
          if ( myShape.ShapeType() == TopAbs_VERTEX )
          {
            Handle(Prs3d_PointAspect) anAspect = AISShape->Attributes()->PointAspect();
            anAspect->SetColor( (Quantity_NameOfColor)GetColor() );
            AISShape->Attributes()->SetPointAspect( anAspect );
          }
        }

        if ( HasWidth() )
          AISShape->SetWidth( GetWidth() );

        if ( !myIO.IsNull() )
        {
          AISShape->setIO( myIO );
          AISShape->SetOwner( myIO );
        }
        else if ( !myName.empty() )
        {
          // Workaround to allow selection of temporary objects
          static int tempId = 0;
          char buf[50];
          sprintf( buf, "TEMP_%d", tempId++ );
          Handle( SALOME_InteractiveObject ) anObj =
            new SALOME_InteractiveObject( buf, "GEOM", myName.c_str() );
          AISShape->setIO( anObj );
          AISShape->SetOwner( anObj );
        }
        // AISShape->SetName(???); ??? necessary to set name ???
        occPrs->AddObject( AISShape );

        // In accordance with ToActivate() value object will be activated/deactivated
        // when it will be displayed
        occPrs->SetToActivate( ToActivate() );
      }
    }
    // if presentation is found -> set again shape for it
    else
    {
      if ( !myShape.IsNull() )
      {
        AIS_ListOfInteractive IOList;
        occPrs->GetObjects( IOList );
        AIS_ListIteratorOfListOfInteractive Iter( IOList );
        for ( ; Iter.More(); Iter.Next() )
        {
          Handle(GEOM_AISShape) AISShape = Handle(GEOM_AISShape)::DownCast( Iter.Value() );
          if ( AISShape.IsNull() )
            continue;
          if ( AISShape->Shape() != myShape )
          {
            AISShape->Set( myShape );
            AISShape->UpdateSelection();
            AISShape->SetToUpdate();
          }
          if ( !myIO.IsNull() )
          {
            AISShape->setIO( myIO );
            AISShape->SetOwner( myIO );
          }
        }
      }
    }
  }
}

//=================================================================
/*!
 *  GEOM_Displayer::Update
 *  Update VTK presentaion
 *  [ Reimplemented from SALOME_Displayer ]
 */
//=================================================================
void GEOM_Displayer::Update( SALOME_VTKPrs* prs )
{
  SVTK_Prs* vtkPrs = dynamic_cast<SVTK_Prs*>( prs );
  if ( !vtkPrs || myShape.IsNull() )
    return;

  vtkActorCollection* theActors = 0;

  if ( myType == GEOM_MARKER && !myShape.IsNull() && myShape.ShapeType() == TopAbs_FACE )
  {
    myToActivate = false;
    GEOM_VTKTrihedron* aTrh = GEOM_VTKTrihedron::New();

    if ( HasColor() )
    {
      Quantity_Color aColor( (Quantity_NameOfColor)GetColor() );
      aTrh->SetColor( aColor.Red(), aColor.Green(), aColor.Blue() );
    }

    Handle(Geom_Plane) aPlane =
      Handle(Geom_Plane)::DownCast( BRep_Tool::Surface( TopoDS::Face( myShape ) ) );
    if ( aPlane.IsNull() )
      return;

    gp_Ax2 anAx2 = aPlane->Pln().Position().Ax2();
    aTrh->SetPlacement( new Geom_Axis2Placement( anAx2 ) );

//    if ( SVTK_Viewer* vf = dynamic_cast<SVTK_Viewer*>( GetActiveView() ) )
//      aTrh->SetSize( 0.5 * vf->GetTrihedronSize() );

    vtkPrs->AddObject( aTrh );

    theActors = vtkActorCollection::New();
    theActors->AddItem( aTrh );
  }
  else
    theActors = GEOM_AssemblyBuilder::BuildActors( myShape, 0, 0, Standard_True );

  theActors->InitTraversal();

  vtkActor* anActor = (vtkActor*)theActors->GetNextActor();

  vtkProperty* aProp = 0;

  if ( HasColor() || HasWidth() )
  {
    aProp = vtkProperty::New();
    aProp->SetRepresentationToWireframe();
  }

  if ( HasColor() )
  {
    Quantity_Color aColor( (Quantity_NameOfColor)GetColor() );
    aProp->SetColor( aColor.Red(), aColor.Green(), aColor.Blue() );
  }

  if ( HasWidth() )
  {
    aProp->SetLineWidth( GetWidth() );
  }

  while ( anActor != NULL )
  {
    SALOME_Actor* GActor = SALOME_Actor::SafeDownCast( anActor );

    GActor->setIO( myIO );

    if ( aProp )
    {
      GActor->SetProperty( aProp );
      GActor->SetPreviewProperty( aProp );

      GEOM_Actor* aGeomGActor = GEOM_Actor::SafeDownCast( anActor );
      if ( aGeomGActor != 0 )
      {
        aGeomGActor->SetShadingProperty( aProp );
        aGeomGActor->SetWireframeProperty( aProp );
      }
    }

    if ( myToActivate )
      GActor->PickableOn();
    else
      GActor->PickableOff();

    vtkPrs->AddObject( GActor );

    anActor = (vtkActor*)theActors->GetNextActor();
  }

  if ( aProp )
    aProp->Delete();

  theActors->Delete();
}

//=================================================================
/*!
 *  GEOM_Displayer::BuildPrs
 *  Build presentation accordint to the current viewer type
 */
//=================================================================
SALOME_Prs* GEOM_Displayer::BuildPrs( GEOM::GEOM_Object_ptr theObj )
{
  if ( theObj->_is_nil() )
    return 0;

  myViewFrame = GetActiveView();
  if ( myViewFrame == 0 )
    return 0;

  SALOME_Prs* aPrs = myViewFrame->CreatePrs();
  if ( aPrs == 0 )
    return 0;

  internalReset();
  setShape( GEOM_Client().GetShape( GeometryGUI::GetGeomGen(), theObj ) );
  myType = theObj->GetType();

  // Update presentation
  UpdatePrs( aPrs );

  return aPrs;
}

//=================================================================
/*!
 *  GEOM_Displayer::BuildPrs
 *  Build presentation accordint to the current viewer type
 */
//=================================================================
SALOME_Prs* GEOM_Displayer::BuildPrs( const TopoDS_Shape& theShape )
{
  myViewFrame = GetActiveView();
  if ( theShape.IsNull() || myViewFrame == 0 )
    return 0;

  SALOME_Prs* aPrs = myViewFrame->CreatePrs();
  if ( aPrs == 0 )
    return 0;

  internalReset();
  setShape( theShape );
  myType = -1;

  UpdatePrs( aPrs );

  return aPrs;
}

//=================================================================
/*!
 *  GEOM_Displayer::buildPresentation
 *  Builds/finds object's presentation for the current viewer
 *  Calls corresponding Update() method by means of double dispatch
 *  [ internal ]
 */
//=================================================================
SALOME_Prs* GEOM_Displayer::buildPresentation( const QString& entry,
					       SALOME_View* theViewFrame )
{
  SALOME_Prs* prs = 0;
  internalReset();

  myViewFrame = theViewFrame ? theViewFrame : GetActiveView();

  if ( myViewFrame )
  {
    prs = LightApp_Displayer::buildPresentation( entry, theViewFrame );
    if ( prs )
    {
      Handle( SALOME_InteractiveObject ) theIO = new SALOME_InteractiveObject();
      theIO->setEntry( entry.latin1() );
      if ( !theIO.IsNull() )
      {
	// set interactive object
	setIO( theIO );
	//  Find SOBject (because shape should be published previously)
	SUIT_Session* session = SUIT_Session::session();
	SUIT_Application* app = session->activeApplication();
	if ( app )
	{
	  SalomeApp_Study* study = dynamic_cast<SalomeApp_Study*>( app->activeStudy() );
	  if ( study )
	  {
	    _PTR(SObject) SO ( study->studyDS()->FindObjectID( theIO->getEntry() ) );
	    if ( SO )
	    {
	      // get CORBA reference to data object
	      CORBA::Object_var object = GeometryGUI::ClientSObjectToObject(SO);
	      if ( !CORBA::is_nil( object ) )
	      {
		// downcast to GEOM object
		GEOM::GEOM_Object_var GeomObject = GEOM::GEOM_Object::_narrow( object );
		if ( !GeomObject->_is_nil() )
		{
		  // finally set shape
		  setShape( GEOM_Client().GetShape( GeometryGUI::GetGeomGen(), GeomObject ) );
		  myType = GeomObject->GetType();
		}
	      }
	    }
	  }
	}
      }
      UpdatePrs( prs );  // Update presentation by using of the double dispatch
    }
  }
  return prs;
}

//=================================================================
/*!
 *  GEOM_Displayer::internalReset
 *  Resets internal data
 *  [internal]
 */
//=================================================================
void GEOM_Displayer::internalReset()
{
  myIO.Nullify();
  myShape.Nullify();
}

//=================================================================
/*!
 *  GEOM_Displayer::LocalSelection
 *  Activate selection of CAD shapes with activisation of selection
 *  of their sub-shapes (with opened local context for OCC viewer)
 */
//=================================================================
void GEOM_Displayer::LocalSelection( const Handle(SALOME_InteractiveObject)& theIO, const int theMode )
{
  SUIT_Session* session = SUIT_Session::session();
  SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( session->activeApplication() );
  if ( !app )
    return;

  LightApp_SelectionMgr* sm = app->selectionMgr();

  // remove all filters from selection
  sm->clearFilters();

  SALOME_View* vf = GetActiveView();
  if ( vf )
    {
      SALOME_Prs* prs = vf->CreatePrs( theIO.IsNull() ? 0 : theIO->getEntry() );
      vf->LocalSelection( prs, theMode );
      delete prs;  // delete presentation because displayer is its owner
    }
}

//=================================================================
/*!
 *  GEOM_Displayer::globalSelection
 *  Activate selection of CAD shapes without activisation of selection
 *  of their sub-shapes (without opened local context for OCC viewer)
 */
//=================================================================
void GEOM_Displayer::GlobalSelection( const int theMode, const bool update )
{
  TColStd_MapOfInteger aModes;
  aModes.Add( theMode );
  GlobalSelection( aModes, update );
}

//=================================================================
/*!
 *  GEOM_Displayer::globalSelection
 *  Activate selection of CAD shapes without activisation of selection
 *  of their sub-shapes (without opened local context for OCC viewer)
 */
//=================================================================
void GEOM_Displayer::GlobalSelection( const TColStd_MapOfInteger& theModes,
				      const bool update )
{
  SUIT_Session* session = SUIT_Session::session();
  SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( session->activeApplication() );
  if ( !app )
    return;

  SALOME_View* vf = GetActiveView();
  if ( vf == 0 )
    return;

  // Close local context
  vf->GlobalSelection( update );

  // Set selection filters in accordance with current mode
  LightApp_SelectionMgr* sm = app->selectionMgr();
  if ( !sm )
    return;

  // Remove from selection temporary objects if necessary
  if ( !theModes.Contains( GEOM_PREVIEW ) )
    clearTemporary( sm );

  //@ aSel->ClearIndex();

  sm->clearFilters();

  // Remove filters from AIS_InteractiveContext
  Handle(AIS_InteractiveContext) ic;
  SOCC_Viewer* viewer = dynamic_cast<SOCC_Viewer*>( vf );
  if ( viewer )
    {
      ic = viewer->getAISContext();
      if ( !ic.IsNull() )
	ic->RemoveFilters();
    }

  if ( theModes.Contains( GEOM_ALLOBJECTS ) )
    return;

  SUIT_SelectionFilter* aFilter;
  if ( theModes.Extent() == 1 )
    {
      int aMode = TColStd_MapIteratorOfMapOfInteger( theModes ).Key();
      aFilter = getFilter( aMode );
    }
  else if ( theModes.Extent() > 1 )
    {
      TColStd_MapOfInteger aTopAbsModes;
      TColStd_MapIteratorOfMapOfInteger anIter( theModes );
      QPtrList<SUIT_SelectionFilter> aListOfFilters;
      for ( ; anIter.More(); anIter.Next() )
	{
	  SUIT_SelectionFilter* aFilter = getFilter( anIter.Key() );
	  if ( aFilter )
	    aListOfFilters.append( aFilter );
	}

      aFilter = new GEOM_LogicalFilter( aListOfFilters, GEOM_LogicalFilter::LO_OR );
    }
  else
    return;

  if ( aFilter )
    {
      sm->installFilter( aFilter );
      if ( !ic.IsNull() )
	{
	  Handle(GEOM_OCCFilter) anOCCFilter = new GEOM_OCCFilter( sm );
	  ic->AddFilter( anOCCFilter );
	}
    }
}

//=================================================================
/*!
 *  GEOM_Displayer::LocalSelection
 *  Activate selection of CAD shapes with activisation of selection
 *  of their sub-shapes (with opened local context for OCC viewer)
 */
//=================================================================
void GEOM_Displayer::LocalSelection( const SALOME_ListIO& theIOList, const int theMode )
{
  SALOME_ListIteratorOfListIO Iter( theIOList );
  for ( ; Iter.More(); Iter.Next() )
    LocalSelection( Iter.Value(), theMode );
}

//=================================================================
/*!
 *  GEOM_Displayer::BeforeDisplay
 *  Called before displaying of pars. Close local context
 *  [ Reimplemented from SALOME_Displayer ]
 */
//=================================================================
void GEOM_Displayer::BeforeDisplay( SALOME_View* v, const SALOME_OCCViewType& )
{
  SOCC_Viewer* vf = dynamic_cast<SOCC_Viewer*>( v );
  if ( vf )
  {
    Handle(AIS_InteractiveContext) ic = vf->getAISContext();
    if ( !ic.IsNull() )
    {
      if ( ic->HasOpenedContext() )
      ic->CloseAllContexts();
    }
  }
}

void GEOM_Displayer::AfterDisplay( SALOME_View*, const SALOME_OCCViewType& )
{
}


//=================================================================
/*!
 *  GEOM_Displayer::SetColor
 *  Set color for shape displaying. If it is equal -1 then default color is used.
 *  Available values are from Quantity_NameOfColor enumeration
 */
//=================================================================
void GEOM_Displayer::SetColor( const int color )
{
  myColor = color;
}

int GEOM_Displayer::GetColor() const
{
  return myColor;
}

bool GEOM_Displayer::HasColor() const
{
  return myColor != -1;
}

void GEOM_Displayer::UnsetColor()
{
  myColor = -1;
}

//=================================================================
/*!
 *  GEOM_Displayer::SetWidth
 *  Set width of shape displaying. If it is equal -1 then default width is used.
 */
//=================================================================
void GEOM_Displayer::SetWidth( const double width )
{
  myWidth = width;
}

double GEOM_Displayer::GetWidth() const
{
  return myWidth;
}

bool GEOM_Displayer::HasWidth() const
{
  return myWidth != -1;
}

void GEOM_Displayer::UnsetWidth()
{
  myWidth = -1;
}

//=================================================================
/*!
 *  GEOM_Displayer::SetToActivate
 *  This method is used for activisation/deactivisation of objects to be displayed
 */
//=================================================================
void GEOM_Displayer::SetToActivate( const bool toActivate )
{
  myToActivate = toActivate;
}
bool GEOM_Displayer::ToActivate() const
{
  return myToActivate;
}

//=================================================================
/*!
 *  GEOM_Displayer::clearTemporary
 *  Removes from selection temporary objects
 */
//=================================================================
void GEOM_Displayer::clearTemporary( LightApp_SelectionMgr* theSelMgr )
{
  SALOME_ListIO selected, toSelect;
  theSelMgr->selectedObjects( selected );

  for (  SALOME_ListIteratorOfListIO it( selected ) ; it.More(); it.Next() ) {
    Handle(SALOME_InteractiveObject) io = it.Value();
    if ( !io.IsNull() && io->hasEntry() && strncmp( io->getEntry(), "TEMP_", 5 ) != 0 )
      toSelect.Append( it.Value() );
  }

  theSelMgr->setSelectedObjects( toSelect, true );
}