--- /dev/null
+// Copyright (C) 2007-2011 CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007 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.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+// File : SMESHDS_GroupOnFilter.cxx
+// Module : SMESH
+//
+#include "SMESHDS_GroupOnFilter.hxx"
+
+#include "SMESHDS_Mesh.hxx"
+#include "SMDS_SetIterator.hxx"
+
+using namespace std;
+
+//=============================================================================
+/*!
+ * Creates a group based on thePredicate
+ */
+//=============================================================================
+
+SMESHDS_GroupOnFilter::SMESHDS_GroupOnFilter (const int theID,
+ const SMESHDS_Mesh* theMesh,
+ const SMDSAbs_ElementType theType,
+ const SMESH_PredicatePtr& thePredicate)
+ : SMESHDS_GroupBase(theID,theMesh,theType), myMeshModifTime(0)
+{
+ setChanged();
+ SetPredicate( thePredicate );
+}
+
+//================================================================================
+/*!
+ * \brief Sets a new predicate
+ */
+//================================================================================
+
+void SMESHDS_GroupOnFilter::SetPredicate( const SMESH_PredicatePtr& thePredicate)
+{
+ myPredicate = thePredicate;
+ setChanged();
+ if ( myPredicate )
+ myPredicate->SetMesh( GetMesh() );
+}
+
+//================================================================================
+/*!
+ * \brief Returns nb of elements
+ */
+//================================================================================
+
+int SMESHDS_GroupOnFilter::Extent()
+{
+ update();
+ return myElements.size();
+}
+
+//================================================================================
+/*!
+ * \brief Checks if the element belongs to the group
+ */
+//================================================================================
+
+bool SMESHDS_GroupOnFilter::Contains (const int theID)
+{
+ return myPredicate ? myPredicate->IsSatisfy( theID ) : false;
+}
+
+//================================================================================
+/*!
+ * \brief Checks if the element belongs to the group
+ */
+//================================================================================
+
+bool SMESHDS_GroupOnFilter::Contains (const SMDS_MeshElement* elem)
+{
+ return myPredicate ? myPredicate->IsSatisfy( elem->GetID() ) : false;
+}
+
+//================================================================================
+/*!
+ * \brief Return iterator on all elements
+ */
+//================================================================================
+
+SMDS_ElemIteratorPtr SMESHDS_GroupOnFilter::GetElements() const
+{
+ update();
+ return SMDS_ElemIteratorPtr
+ ( new SMDS_ElementVectorIterator( myElements.begin(), myElements.end() ));
+}
+
+//================================================================================
+/*!
+ * \brief return ID of theIndex-th element
+ * \param theIndex - index countered from 1
+ * \retval int - element ID
+ */
+//================================================================================
+
+int SMESHDS_GroupOnFilter::GetID (const int theIndex)
+{
+ update();
+ if ( theIndex < 1 || theIndex > myElements.size() )
+ return -1;
+ return myElements[ theIndex-1 ]->GetID();
+}
+
+//================================================================================
+/*!
+ * \brief Updates myElements if necessary
+ */
+//================================================================================
+
+void SMESHDS_GroupOnFilter::update() const
+{
+ if ( myMeshModifTime < GetMesh()->GetMTime() )
+ {
+ SMESHDS_GroupOnFilter* me = const_cast<SMESHDS_GroupOnFilter*>( this );
+ me->myElements.clear();
+ if ( myPredicate )
+ {
+ me->myElements.reserve( GetMesh()->GetMeshInfo().NbElements(GetType()));
+ SMDS_ElemIteratorPtr elIt = GetMesh()->elementsIterator(GetType());
+ while ( elIt->more() )
+ {
+ const SMDS_MeshElement* e = elIt->next();
+ if ( myPredicate->IsSatisfy( e->GetID() ))
+ me->myElements.push_back( e );
+ }
+ me->myElements.resize( myElements.size() );
+ }
+ me->setChanged( false );
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Sets myMeshModifTime according to modification state
+ */
+//================================================================================
+
+void SMESHDS_GroupOnFilter::setChanged(bool changed)
+{
+ myMeshModifTime = GetMesh()->GetMTime();
+ if ( changed && myMeshModifTime != 0 )
+ --myMeshModifTime;
+}
--- /dev/null
+// Copyright (C) 2007-2011 CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007 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.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+// File : SMESHDS_GroupOnFilter.hxx
+// Module : SMESH
+//
+#ifndef _SMESHDS_GroupOnFilter_HeaderFile
+#define _SMESHDS_GroupOnFilter_HeaderFile
+
+#include "SMESH_SMESHDS.hxx"
+
+#include "SMESHDS_GroupBase.hxx"
+#include "SMESH_Controls.hxx"
+
+/*!
+ * \brief Groups whose contents is dynamically updated using the filter
+ */
+class SMESHDS_EXPORT SMESHDS_GroupOnFilter: public SMESHDS_GroupBase
+{
+ public:
+
+ SMESHDS_GroupOnFilter (const int theID,
+ const SMESHDS_Mesh* theMesh,
+ const SMDSAbs_ElementType theType,
+ const SMESH_PredicatePtr& thePredicate);
+
+ void SetPredicate( const SMESH_PredicatePtr& thePredicate);
+
+ SMESH_PredicatePtr GetPredicate() const { return myPredicate; }
+
+ virtual int Extent();
+
+ virtual bool Contains (const int theID);
+
+ virtual bool Contains (const SMDS_MeshElement* elem);
+
+ virtual SMDS_ElemIteratorPtr GetElements() const;
+
+ virtual int GetID (const int theIndex);
+
+ private:
+
+ void update() const;
+ void setChanged(bool changed=true);
+
+ SMESH_PredicatePtr myPredicate;
+ std::vector< const SMDS_MeshElement*> myElements;
+ unsigned long myMeshModifTime; // when myElements was filled
+};
+
+#endif
