smesh/src/SMESHGUI/SMESHGUI_MeshInfo.cxx

// Copyright (C) 2007-2012  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   : SMESHGUI_MeshInfo.cxx
//  Author : Vadim SANDLER, Open CASCADE S.A.S. (vadim.sandler@opencascade.com)

#include "SMESHGUI_MeshInfo.h"

#include "SMESH_Actor.h"
#include "SMESHGUI.h"
#include "SMESHGUI_IdValidator.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_VTKUtils.h"
#include "SMDSAbs_ElementType.hxx"
#include "SMDS_Mesh.hxx"
#include "SMDS_BallElement.hxx"
#include "SMDS_EdgePosition.hxx"
#include "SMDS_FacePosition.hxx"

#include <LightApp_SelectionMgr.h>
#include <SUIT_OverrideCursor.h>
#include <SUIT_ResourceMgr.h>
#include <SVTK_ViewWindow.h>

#include <SALOMEDSClient_Study.hxx>

#include <QApplication>
#include <QButtonGroup>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QItemDelegate>
#include <QKeyEvent>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QRadioButton>
#include <QTabWidget>
#include <QTextBrowser>
#include <QVBoxLayout>

#include "utilities.h"

#include <SALOMEconfig.h>
#include CORBA_SERVER_HEADER(GEOM_Gen)

const int SPACING      = 6;
const int MARGIN       = 9;
const int MAXITEMS     = 10;
const int GROUPS_ID    = 100;
const int SUBMESHES_ID = 200;

/*!
  \class ExtraWidget
  \internal
*/

class ExtraWidget : public QWidget
{
public:
  ExtraWidget( QWidget*, bool = false );
  ~ExtraWidget();

  void updateControls( int, int, int = MAXITEMS );

public:
  QLabel*      current;
  QPushButton* prev;
  QPushButton* next;
  bool         brief;
};

ExtraWidget::ExtraWidget( QWidget* parent, bool b ) : QWidget( parent ), brief( b )
{
  current = new QLabel( this );
  current->setAlignment( Qt::AlignRight | Qt::AlignVCenter );
  prev = new QPushButton( tr( "<<" ), this );
  next = new QPushButton( tr( ">>" ), this );
  QHBoxLayout* hbl = new QHBoxLayout( this );
  hbl->setContentsMargins( 0, SPACING, 0, 0 );
  hbl->setSpacing( SPACING );
  hbl->addStretch();
  hbl->addWidget( current );
  hbl->addWidget( prev );
  hbl->addWidget( next );
}

ExtraWidget::~ExtraWidget()
{
}

void ExtraWidget::updateControls( int total, int index, int blockSize )
{
  setVisible( total > blockSize );
  QString format = brief ? QString( "%1-%2 / %3" ) : SMESHGUI_MeshInfoDlg::tr( "X_FROM_Y_ITEMS_SHOWN" );
  current->setText( format.arg( index*blockSize+1 ).arg( qMin( index*blockSize+blockSize, total ) ).arg( total ) );
  prev->setEnabled( index > 0 );
  next->setEnabled( (index+1)*blockSize < total );
}

/*!
  \class SMESHGUI_MeshInfo
  \brief Base mesh information widget
  
  Displays the base information about mesh object: mesh, sub-mesh, group or arbitrary ID source.
*/

/*!
  \brief Constructor.
  \param parent parent widget
*/
SMESHGUI_MeshInfo::SMESHGUI_MeshInfo( QWidget* parent )
  : QFrame( parent ), myWidgets( iElementsEnd )
{
  setFrameStyle( StyledPanel | Sunken );

  QGridLayout* l = new QGridLayout( this );
  l->setMargin( MARGIN );
  l->setSpacing( SPACING );

  int index = 0;

  // object
  QLabel* aNameLab     = new QLabel( tr( "NAME_LAB" ), this );
  QLabel* aName        = createField();
  aName->setMinimumWidth( 150 );
  QLabel* aObjLab      = new QLabel( tr( "OBJECT_LAB" ), this );
  QLabel* aObj         = createField();
  aObj->setMinimumWidth( 150 );
  myWidgets[ index++ ] << aNameLab << aName;
  myWidgets[ index++ ] << aObjLab  << aObj;

  // nodes
  QWidget* aNodesLine  = createLine();
  QLabel*  aNodesLab   = new QLabel( tr( "NODES_LAB" ), this );
  QLabel*  aNodes      = createField();
  myWidgets[ index++ ] << aNodesLine;
  myWidgets[ index++ ] << aNodesLab << aNodes;

  // elements
  QWidget* aElemLine   = createLine();
  QLabel*  aElemLab    = new QLabel( tr( "ELEMENTS_LAB" ),  this );
  QLabel*  aElemTotal  = new QLabel( tr( "TOTAL_LAB" ),     this );
  QLabel*  aElemLin    = new QLabel( tr( "LINEAR_LAB" ),    this );
  QLabel*  aElemQuad   = new QLabel( tr( "QUADRATIC_LAB" ), this );
  myWidgets[ index++ ] << aElemLine;
  myWidgets[ index++ ] << aElemLab << aElemTotal << aElemLin << aElemQuad;

  // ... 0D elements
  QWidget* a0DLine     = createLine();
  QLabel*  a0DLab      = new QLabel( tr( "0D_LAB" ), this );
  QLabel*  a0DTotal    = createField();
  myWidgets[ index++ ] << a0DLine;
  myWidgets[ index++ ] << a0DLab << a0DTotal;

  // ... Ball elements
  QWidget* aBallLine     = createLine();
  QLabel*  aBallLab      = new QLabel( tr( "BALL_LAB" ), this );
  QLabel*  aBallTotal    = createField();
  myWidgets[ index++ ] << aBallLine;
  myWidgets[ index++ ] << aBallLab << aBallTotal;

  // ... 1D elements
  QWidget* a1DLine     = createLine();
  QLabel*  a1DLab      = new QLabel( tr( "1D_LAB" ), this );
  QLabel*  a1DTotal    = createField();
  QLabel*  a1DLin      = createField();
  QLabel*  a1DQuad     = createField();
  myWidgets[ index++ ] << a1DLine;
  myWidgets[ index++ ] << a1DLab << a1DTotal << a1DLin << a1DQuad;

  // ... 2D elements
  QWidget* a2DLine     = createLine();
  QLabel*  a2DLab      = new QLabel( tr( "2D_LAB" ), this );
  QLabel*  a2DTotal    = createField();
  QLabel*  a2DLin      = createField();
  QLabel*  a2DQuad     = createField();
  QLabel*  a2DTriLab   = new QLabel( tr( "TRIANGLES_LAB" ), this );
  QLabel*  a2DTriTotal = createField();
  QLabel*  a2DTriLin   = createField();
  QLabel*  a2DTriQuad  = createField();
  QLabel*  a2DQuaLab   = new QLabel( tr( "QUADRANGLES_LAB" ), this );
  QLabel*  a2DQuaTotal = createField();
  QLabel*  a2DQuaLin   = createField();
  QLabel*  a2DQuaQuad  = createField();
  QLabel*  a2DPolLab   = new QLabel( tr( "POLYGONS_LAB" ), this );
  QLabel*  a2DPolTotal = createField();
  myWidgets[ index++ ] << a2DLine;
  myWidgets[ index++ ] << a2DLab    << a2DTotal    << a2DLin    << a2DQuad;
  myWidgets[ index++ ] << a2DTriLab << a2DTriTotal << a2DTriLin << a2DTriQuad;
  myWidgets[ index++ ] << a2DQuaLab << a2DQuaTotal << a2DQuaLin << a2DQuaQuad;
  myWidgets[ index++ ] << a2DPolLab << a2DPolTotal;

  // ... 3D elements
  QWidget* a3DLine     = createLine();
  QLabel*  a3DLab      = new QLabel( tr( "3D_LAB" ), this );
  QLabel*  a3DTotal    = createField();
  QLabel*  a3DLin      = createField();
  QLabel*  a3DQuad     = createField();
  QLabel*  a3DTetLab   = new QLabel( tr( "TETRAHEDRONS_LAB" ), this );
  QLabel*  a3DTetTotal = createField();
  QLabel*  a3DTetLin   = createField();
  QLabel*  a3DTetQuad  = createField();
  QLabel*  a3DHexLab   = new QLabel( tr( "HEXAHEDONRS_LAB" ), this );
  QLabel*  a3DHexTotal = createField();
  QLabel*  a3DHexLin   = createField();
  QLabel*  a3DHexQuad  = createField();
  QLabel*  a3DPyrLab   = new QLabel( tr( "PYRAMIDS_LAB" ), this );
  QLabel*  a3DPyrTotal = createField();
  QLabel*  a3DPyrLin   = createField();
  QLabel*  a3DPyrQuad  = createField();
  QLabel*  a3DPriLab   = new QLabel( tr( "PRISMS_LAB" ), this );
  QLabel*  a3DPriTotal = createField();
  QLabel*  a3DPriLin   = createField();
  QLabel*  a3DPriQuad  = createField();
  QLabel*  a3DHexPriLab   = new QLabel( tr( "HEX_PRISMS_LAB" ), this );
  QLabel*  a3DHexPriTotal = createField();
  QLabel*  a3DPolLab   = new QLabel( tr( "POLYHEDRONS_LAB" ), this );
  QLabel*  a3DPolTotal = createField();
  myWidgets[ index++ ] << a3DLine;
  myWidgets[ index++ ] << a3DLab    << a3DTotal    << a3DLin    << a3DQuad;
  myWidgets[ index++ ] << a3DTetLab << a3DTetTotal << a3DTetLin << a3DTetQuad;
  myWidgets[ index++ ] << a3DHexLab << a3DHexTotal << a3DHexLin << a3DHexQuad;
  myWidgets[ index++ ] << a3DPyrLab << a3DPyrTotal << a3DPyrLin << a3DPyrQuad;
  myWidgets[ index++ ] << a3DPriLab << a3DPriTotal << a3DPriLin << a3DPriQuad;
  myWidgets[ index++ ] << a3DHexPriLab << a3DHexPriTotal;
  myWidgets[ index++ ] << a3DPolLab << a3DPolTotal;

  myLoadBtn = new QPushButton( tr( "BUT_LOAD_MESH" ), this );
  myLoadBtn->setAutoDefault( true );
  connect( myLoadBtn, SIGNAL( clicked() ), this, SLOT( loadMesh() ) );
  
  setFontAttributes( aNameLab,   Bold );
  setFontAttributes( aObjLab,    Bold );
  setFontAttributes( aNodesLab,  Bold );
  setFontAttributes( aElemLab,   Bold );
  setFontAttributes( aElemTotal, Italic );
  setFontAttributes( aElemLin,   Italic );
  setFontAttributes( aElemQuad,  Italic );
  setFontAttributes( a0DLab,     Bold );
  setFontAttributes( aBallLab,     Bold );
  setFontAttributes( a1DLab,     Bold );
  setFontAttributes( a2DLab,     Bold );
  setFontAttributes( a3DLab,     Bold );

  l->addWidget( aNameLab,     0, 0 );
  l->addWidget( aName,        0, 1, 1, 3 );
  l->addWidget( aObjLab,      1, 0 );
  l->addWidget( aObj,         1, 1, 1, 3 );
  l->addWidget( aNodesLine,   2, 0, 1, 4 );
  l->addWidget( aNodesLab,    3, 0 );
  l->addWidget( aNodes,       3, 1 );
  l->addWidget( aElemLine,    4, 0, 1, 4 );
  l->addWidget( aElemLab,     5, 0 );
  l->addWidget( aElemTotal,   5, 1 );
  l->addWidget( aElemLin,     5, 2 );
  l->addWidget( aElemQuad,    5, 3 );
  l->addWidget( a0DLine,      6, 1, 1, 3 );
  l->addWidget( a0DLab,       7, 0 );
  l->addWidget( a0DTotal,     7, 1 );
  l->addWidget( aBallLine,    8, 1, 1, 3 );
  l->addWidget( aBallLab,     9, 0 );
  l->addWidget( aBallTotal,   9, 1 );
  l->addWidget( a1DLine,      10, 1, 1, 3 );
  l->addWidget( a1DLab,       11, 0 );
  l->addWidget( a1DTotal,     11, 1 );
  l->addWidget( a1DLin,       11, 2 );
  l->addWidget( a1DQuad,      11, 3 );
  l->addWidget( a2DLine,     12, 1, 1, 3 );
  l->addWidget( a2DLab,      13, 0 );
  l->addWidget( a2DTotal,    13, 1 );
  l->addWidget( a2DLin,      13, 2 );
  l->addWidget( a2DQuad,     13, 3 );
  l->addWidget( a2DTriLab,   14, 0 );
  l->addWidget( a2DTriTotal, 14, 1 );
  l->addWidget( a2DTriLin,   14, 2 );
  l->addWidget( a2DTriQuad,  14, 3 );
  l->addWidget( a2DQuaLab,   15, 0 );
  l->addWidget( a2DQuaTotal, 15, 1 );
  l->addWidget( a2DQuaLin,   15, 2 );
  l->addWidget( a2DQuaQuad,  15, 3 );
  l->addWidget( a2DPolLab,   16, 0 );
  l->addWidget( a2DPolTotal, 16, 1 );
  l->addWidget( a3DLine,     17, 1, 1, 3 );
  l->addWidget( a3DLab,      18, 0 );
  l->addWidget( a3DTotal,    18, 1 );
  l->addWidget( a3DLin,      18, 2 );
  l->addWidget( a3DQuad,     18, 3 );
  l->addWidget( a3DTetLab,   19, 0 );
  l->addWidget( a3DTetTotal, 19, 1 );
  l->addWidget( a3DTetLin,   19, 2 );
  l->addWidget( a3DTetQuad,  19, 3 );
  l->addWidget( a3DHexLab,   20, 0 );
  l->addWidget( a3DHexTotal, 20, 1 );
  l->addWidget( a3DHexLin,   20, 2 );
  l->addWidget( a3DHexQuad,  20, 3 );
  l->addWidget( a3DPyrLab,   21, 0 );
  l->addWidget( a3DPyrTotal, 21, 1 );
  l->addWidget( a3DPyrLin,   21, 2 );
  l->addWidget( a3DPyrQuad,  21, 3 );
  l->addWidget( a3DPriLab,   22, 0 );
  l->addWidget( a3DPriTotal, 22, 1 );
  l->addWidget( a3DPriLin,   22, 2 );
  l->addWidget( a3DPriQuad,  22, 3 );
  l->addWidget( a3DHexPriLab,   23, 0 );
  l->addWidget( a3DHexPriTotal, 23, 1 );
  l->addWidget( a3DPolLab,   24, 0 );
  l->addWidget( a3DPolTotal, 24, 1 );
  l->addWidget( myLoadBtn,   25, 1, 1, 3 );
  l->setColumnStretch( 0, 0 );
  l->setColumnStretch( 1, 5 );
  l->setColumnStretch( 2, 5 );
  l->setColumnStretch( 3, 5 );
  l->setRowStretch( 23, 5 );

  clear();
}

/*!
  \brief Destructor
*/
SMESHGUI_MeshInfo::~SMESHGUI_MeshInfo()
{
}

/*!
  \brief Show information on the mesh object.
  \param obj object being processed (mesh, sub-mesh, group, ID source)
*/
void SMESHGUI_MeshInfo::showInfo( SMESH::SMESH_IDSource_ptr obj )
{
  clear();
  if ( !CORBA::is_nil( obj ) ) {
    _PTR(SObject) sobj = SMESH::ObjectToSObject( obj );
    if ( sobj ) 
      myWidgets[iName][iSingle]->setProperty( "text", sobj->GetName().c_str() );
    SMESH::SMESH_Mesh_var      aMesh    = SMESH::SMESH_Mesh::_narrow( obj );
    SMESH::SMESH_subMesh_var   aSubMesh = SMESH::SMESH_subMesh::_narrow( obj );
    SMESH::SMESH_GroupBase_var aGroup   = SMESH::SMESH_GroupBase::_narrow( obj );
    if ( !aMesh->_is_nil() ) {
      myWidgets[iObject][iSingle]->setProperty( "text", tr( "OBJECT_MESH" ) );
    }
    else if ( !aSubMesh->_is_nil() ) {
      myWidgets[iObject][iSingle]->setProperty( "text", tr( "OBJECT_SUBMESH" ) );
    }
    else if ( !aGroup->_is_nil() ) {
      QString objType;
      switch( aGroup->GetType() ) {
      case SMESH::NODE:
        objType = tr( "OBJECT_GROUP_NODES" );
        break;
      case SMESH::EDGE:
        objType = tr( "OBJECT_GROUP_EDGES" );
        break;
      case SMESH::FACE:
        objType = tr( "OBJECT_GROUP_FACES" );
        break;
      case SMESH::VOLUME:
        objType = tr( "OBJECT_GROUP_VOLUMES" );
        break;
      case SMESH::ELEM0D:
        objType = tr( "OBJECT_GROUP_0DELEMS" );
        break;
      case SMESH::BALL:
        objType = tr( "OBJECT_GROUP_BALLS" );
        break;
      default:
        objType = tr( "OBJECT_GROUP" );
        break;
      }
      myWidgets[iObject][iSingle]->setProperty( "text", objType );
    }
    SMESH::long_array_var info = obj->GetMeshInfo();
    myWidgets[iNodes][iTotal] ->setProperty( "text", QString::number( info[SMDSEntity_Node] ) );
    myWidgets[i0D][iTotal]    ->setProperty( "text", QString::number( info[SMDSEntity_0D] ) );
    myWidgets[iBalls][iTotal] ->setProperty( "text", QString::number( info[SMDSEntity_Ball] ) );
    long nbEdges = info[SMDSEntity_Edge] + info[SMDSEntity_Quad_Edge];
    myWidgets[i1D][iTotal]    ->setProperty( "text", QString::number( nbEdges ) );
    myWidgets[i1D][iLinear]   ->setProperty( "text", QString::number( info[SMDSEntity_Edge] ) );
    myWidgets[i1D][iQuadratic]->setProperty( "text", QString::number( info[SMDSEntity_Quad_Edge] ) );
    long nbTriangles   = info[SMDSEntity_Triangle]   + info[SMDSEntity_Quad_Triangle];
    long nbQuadrangles = info[SMDSEntity_Quadrangle] + info[SMDSEntity_Quad_Quadrangle] + info[SMDSEntity_BiQuad_Quadrangle];
    long nb2DLinear    = info[SMDSEntity_Triangle] + info[SMDSEntity_Quadrangle] + info[SMDSEntity_Polygon];
    long nb2DQuadratic = info[SMDSEntity_Quad_Triangle] + info[SMDSEntity_Quad_Quadrangle] + info[SMDSEntity_BiQuad_Quadrangle];
    myWidgets[i2D][iTotal]               ->setProperty( "text", QString::number( nb2DLinear + nb2DQuadratic ) );
    myWidgets[i2D][iLinear]              ->setProperty( "text", QString::number( nb2DLinear ) );
    myWidgets[i2D][iQuadratic]           ->setProperty( "text", QString::number( nb2DQuadratic ) );
    myWidgets[i2DTriangles][iTotal]      ->setProperty( "text", QString::number( nbTriangles ) );
    myWidgets[i2DTriangles][iLinear]     ->setProperty( "text", QString::number( info[SMDSEntity_Triangle] ) );
    myWidgets[i2DTriangles][iQuadratic]  ->setProperty( "text", QString::number( info[SMDSEntity_Quad_Triangle] ) );
    myWidgets[i2DQuadrangles][iTotal]    ->setProperty( "text", QString::number( nbQuadrangles ) );
    myWidgets[i2DQuadrangles][iLinear]   ->setProperty( "text", QString::number( info[SMDSEntity_Quadrangle] ) );
    myWidgets[i2DQuadrangles][iQuadratic]->setProperty( "text", QString::number( info[SMDSEntity_Quad_Quadrangle] + info[SMDSEntity_BiQuad_Quadrangle] ));
    myWidgets[i2DPolygons][iTotal]       ->setProperty( "text", QString::number( info[SMDSEntity_Polygon] ) );
    long nbTetrahedrons = info[SMDSEntity_Tetra]   + info[SMDSEntity_Quad_Tetra];
    long nbHexahedrons  = info[SMDSEntity_Hexa]    + info[SMDSEntity_Quad_Hexa] + info[SMDSEntity_TriQuad_Hexa];
    long nbPyramids     = info[SMDSEntity_Pyramid] + info[SMDSEntity_Quad_Pyramid];
    long nbPrisms       = info[SMDSEntity_Penta]   + info[SMDSEntity_Quad_Penta];
    long nb3DLinear     = info[SMDSEntity_Tetra] + info[SMDSEntity_Hexa] + info[SMDSEntity_Pyramid] + info[SMDSEntity_Penta] + info[SMDSEntity_Polyhedra] + info[SMDSEntity_Hexagonal_Prism];
    long nb3DQuadratic  = info[SMDSEntity_Quad_Tetra] + info[SMDSEntity_Quad_Hexa] + info[SMDSEntity_TriQuad_Hexa] + info[SMDSEntity_Quad_Pyramid] + info[SMDSEntity_Quad_Penta];
    myWidgets[i3D][iTotal]                ->setProperty( "text", QString::number( nb3DLinear + nb3DQuadratic ) );
    myWidgets[i3D][iLinear]               ->setProperty( "text", QString::number( nb3DLinear ) );
    myWidgets[i3D][iQuadratic]            ->setProperty( "text", QString::number( nb3DQuadratic ) );
    myWidgets[i3DTetrahedrons][iTotal]    ->setProperty( "text", QString::number( nbTetrahedrons ) );
    myWidgets[i3DTetrahedrons][iLinear]   ->setProperty( "text", QString::number( info[SMDSEntity_Tetra] ) );
    myWidgets[i3DTetrahedrons][iQuadratic]->setProperty( "text", QString::number( info[SMDSEntity_Quad_Tetra] ) );
    myWidgets[i3DHexahedrons][iTotal]     ->setProperty( "text", QString::number( nbHexahedrons ) );
    myWidgets[i3DHexahedrons][iLinear]    ->setProperty( "text", QString::number( info[SMDSEntity_Hexa] ) );
    myWidgets[i3DHexahedrons][iQuadratic] ->setProperty( "text", QString::number( info[SMDSEntity_Quad_Hexa] + info[SMDSEntity_TriQuad_Hexa] ) );
    myWidgets[i3DPyramids][iTotal]        ->setProperty( "text", QString::number( nbPyramids ) );
    myWidgets[i3DPyramids][iLinear]       ->setProperty( "text", QString::number( info[SMDSEntity_Pyramid] ) );
    myWidgets[i3DPyramids][iQuadratic]    ->setProperty( "text", QString::number( info[SMDSEntity_Quad_Pyramid] ) );
    myWidgets[i3DPrisms][iTotal]          ->setProperty( "text", QString::number( nbPrisms ) );
    myWidgets[i3DPrisms][iLinear]         ->setProperty( "text", QString::number( info[SMDSEntity_Penta] ) );
    myWidgets[i3DPrisms][iQuadratic]      ->setProperty( "text", QString::number( info[SMDSEntity_Quad_Penta] ) );
    myWidgets[i3DHexaPrisms][iTotal]      ->setProperty( "text", QString::number( info[SMDSEntity_Hexagonal_Prism] ) );
    myWidgets[i3DPolyhedrons][iTotal]     ->setProperty( "text", QString::number( info[SMDSEntity_Polyhedra] ) );

    // before full loading from study file, type of elements in a sub-mesh can't be defined
    // in some cases
    bool infoOK = obj->IsMeshInfoCorrect();
    myLoadBtn->setVisible( !infoOK );
    if ( !infoOK )
    {
      // two options:
      // 1. Type of 2D or 3D elements is unknown but their nb is OK (for a sub-mesh)
      // 2. No info at all (for a group on geom or filter)
      bool hasAnyInfo = false;
      for ( size_t i = 0; i < info->length() && !hasAnyInfo; ++i )
        hasAnyInfo = info[i];
      if ( hasAnyInfo ) // believe it is a sub-mesh
      {
        if ( nb2DLinear + nb2DQuadratic > 0 )
        {
          myWidgets[i2D][iLinear]              ->setProperty( "text", "?" );
          myWidgets[i2D][iQuadratic]           ->setProperty( "text", "?" );
          myWidgets[i2DTriangles][iTotal]      ->setProperty( "text", "?" );
          myWidgets[i2DTriangles][iLinear]     ->setProperty( "text", "?" );
          myWidgets[i2DTriangles][iQuadratic]  ->setProperty( "text", "?" );
          myWidgets[i2DQuadrangles][iTotal]    ->setProperty( "text", "?" );
          myWidgets[i2DQuadrangles][iLinear]   ->setProperty( "text", "?" );
          myWidgets[i2DQuadrangles][iQuadratic]->setProperty( "text", "?" );
          myWidgets[i2DPolygons][iTotal]       ->setProperty( "text", "?" );
        }
        else if ( nb3DLinear + nb3DQuadratic > 0 )
        {
          myWidgets[i3D][iLinear]               ->setProperty( "text", "?" );
          myWidgets[i3D][iQuadratic]            ->setProperty( "text", "?" );
          myWidgets[i3DTetrahedrons][iTotal]    ->setProperty( "text", "?" );
          myWidgets[i3DTetrahedrons][iLinear]   ->setProperty( "text", "?" );
          myWidgets[i3DTetrahedrons][iQuadratic]->setProperty( "text", "?" );
          myWidgets[i3DHexahedrons][iTotal]     ->setProperty( "text", "?" );
          myWidgets[i3DHexahedrons][iLinear]    ->setProperty( "text", "?" );
          myWidgets[i3DHexahedrons][iQuadratic] ->setProperty( "text", "?" );
          myWidgets[i3DPyramids][iTotal]        ->setProperty( "text", "?" );
          myWidgets[i3DPyramids][iLinear]       ->setProperty( "text", "?" );
          myWidgets[i3DPyramids][iQuadratic]    ->setProperty( "text", "?" );
          myWidgets[i3DPrisms][iTotal]          ->setProperty( "text", "?" );
          myWidgets[i3DPrisms][iLinear]         ->setProperty( "text", "?" );
          myWidgets[i3DPrisms][iQuadratic]      ->setProperty( "text", "?" );
          myWidgets[i3DHexaPrisms][iTotal]      ->setProperty( "text", "?" );
          myWidgets[i3DPolyhedrons][iTotal]     ->setProperty( "text", "?" );
        }
      }
      else
      {
        myWidgets[iNodes][iTotal]             ->setProperty( "text", "?" );
        myWidgets[i0D][iTotal]                ->setProperty( "text", "?" );
        myWidgets[iBalls][iTotal]             ->setProperty( "text", "?" );
        myWidgets[i1D][iTotal]                ->setProperty( "text", "?" );
        myWidgets[i1D][iLinear]               ->setProperty( "text", "?" );
        myWidgets[i1D][iQuadratic]            ->setProperty( "text", "?" );
        myWidgets[i2D][iTotal]                ->setProperty( "text", "?" );
        myWidgets[i2D][iLinear]               ->setProperty( "text", "?" );
        myWidgets[i2D][iQuadratic]            ->setProperty( "text", "?" );
        myWidgets[i2DTriangles][iTotal]       ->setProperty( "text", "?" );
        myWidgets[i2DTriangles][iLinear]      ->setProperty( "text", "?" );
        myWidgets[i2DTriangles][iQuadratic]   ->setProperty( "text", "?" );
        myWidgets[i2DQuadrangles][iTotal]     ->setProperty( "text", "?" );
        myWidgets[i2DQuadrangles][iLinear]    ->setProperty( "text", "?" );
        myWidgets[i2DQuadrangles][iQuadratic] ->setProperty( "text", "?" );
        myWidgets[i2DPolygons][iTotal]        ->setProperty( "text", "?" );
        myWidgets[i3D][iTotal]                ->setProperty( "text", "?" );
        myWidgets[i3D][iLinear]               ->setProperty( "text", "?" );
        myWidgets[i3D][iQuadratic]            ->setProperty( "text", "?" );
        myWidgets[i3DTetrahedrons][iTotal]    ->setProperty( "text", "?" );
        myWidgets[i3DTetrahedrons][iLinear]   ->setProperty( "text", "?" );
        myWidgets[i3DTetrahedrons][iQuadratic]->setProperty( "text", "?" );
        myWidgets[i3DHexahedrons][iTotal]     ->setProperty( "text", "?" );
        myWidgets[i3DHexahedrons][iLinear]    ->setProperty( "text", "?" );
        myWidgets[i3DHexahedrons][iQuadratic] ->setProperty( "text", "?" );
        myWidgets[i3DPyramids][iTotal]        ->setProperty( "text", "?" );
        myWidgets[i3DPyramids][iLinear]       ->setProperty( "text", "?" );
        myWidgets[i3DPyramids][iQuadratic]    ->setProperty( "text", "?" );
        myWidgets[i3DPrisms][iTotal]          ->setProperty( "text", "?" );
        myWidgets[i3DPrisms][iLinear]         ->setProperty( "text", "?" );
        myWidgets[i3DPrisms][iQuadratic]      ->setProperty( "text", "?" );
        myWidgets[i3DHexaPrisms][iTotal]      ->setProperty( "text", "?" );
        myWidgets[i3DPolyhedrons][iTotal]     ->setProperty( "text", "?" );
      }
    }
  }
}

/*!
  \brief Load mesh from a study file
*/
void SMESHGUI_MeshInfo::loadMesh()
{
  SUIT_OverrideCursor wc;

  SALOME_ListIO selected;
  SMESHGUI::selectionMgr()->selectedObjects( selected );

  if ( selected.Extent() == 1 ) {
    Handle(SALOME_InteractiveObject) IO = selected.First();
    SMESH::SMESH_IDSource_var obj = SMESH::IObjectToInterface<SMESH::SMESH_IDSource>( IO );
    if ( !CORBA::is_nil( obj ) ) {
      SMESH::SMESH_Mesh_var mesh = obj->GetMesh();
      if ( !mesh->_is_nil() )
      {
        mesh->Load();
        showInfo( obj );
      }
    }
  }
}

/*!
  \brief Reset the widget to the initial state (nullify all fields).
*/
void SMESHGUI_MeshInfo::clear()
{
  myWidgets[iName][iSingle]             ->setProperty( "text", QString() );
  myWidgets[iObject][iSingle]           ->setProperty( "text", QString() );
  myWidgets[iNodes][iTotal]             ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i0D][iTotal]                ->setProperty( "text", QString::number( 0 ) );
  myWidgets[iBalls][iTotal]             ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i1D][iTotal]                ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i1D][iLinear]               ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i1D][iQuadratic]            ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2D][iTotal]                ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2D][iLinear]               ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2D][iQuadratic]            ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DTriangles][iTotal]       ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DTriangles][iLinear]      ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DTriangles][iQuadratic]   ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DQuadrangles][iTotal]     ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DQuadrangles][iLinear]    ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DQuadrangles][iQuadratic] ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i2DPolygons][iTotal]        ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3D][iTotal]                ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3D][iLinear]               ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3D][iQuadratic]            ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DTetrahedrons][iTotal]    ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DTetrahedrons][iLinear]   ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DTetrahedrons][iQuadratic]->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DHexahedrons][iTotal]     ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DHexahedrons][iLinear]    ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DHexahedrons][iQuadratic] ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPyramids][iTotal]        ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPyramids][iLinear]       ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPyramids][iQuadratic]    ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPrisms][iTotal]          ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPrisms][iLinear]         ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPrisms][iQuadratic]      ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DHexaPrisms][iTotal]      ->setProperty( "text", QString::number( 0 ) );
  myWidgets[i3DPolyhedrons][iTotal]     ->setProperty( "text", QString::number( 0 ) );
}

/*!
  \brief Create info field
  \return new info field
*/
QLabel* SMESHGUI_MeshInfo::createField()
{
  QLabel* lab = new QLabel( this );
  lab->setFrameStyle( StyledPanel | Sunken );
  lab->setAlignment( Qt::AlignCenter );
  lab->setAutoFillBackground( true );
  QPalette pal = lab->palette();
  pal.setColor( QPalette::Window, QApplication::palette().color( QPalette::Active, QPalette::Base ) );
  lab->setPalette( pal );
  lab->setMinimumWidth( 70 );
  return lab;
}

/*!
  \brief Create horizontal rule.
  \return new line object
*/
QWidget* SMESHGUI_MeshInfo::createLine()
{
  QFrame* line = new QFrame( this );
  line->setFrameStyle( HLine | Sunken );
  return line;
}

/*!
  \brief Change widget font attributes (bold, italic, ...).
  \param w widget
  \param attr font attributes (XORed flags)
  \param val value to be set to attributes
*/
void SMESHGUI_MeshInfo::setFontAttributes( QWidget* w, int attr, bool val )
{
  if ( w && attr ) {
    QFont f = w->font();
    if ( attr & Bold   ) f.setBold( val );
    if ( attr & Italic ) f.setItalic( val );
    w->setFont( f );
  }
}

/*!
  \brief Show/hide group(s) of fields.
  \param start beginning of the block
  \param end end of the block
  \param on visibility flag
*/
void SMESHGUI_MeshInfo::setFieldsVisible( int start, int end, bool on )
{
  start = qMax( 0, start );
  end   = qMin( end, (int)iElementsEnd );
  for ( int i = start; i < end; i++ ) {
    wlist wl = myWidgets[i];
    foreach ( QWidget* w, wl ) w->setVisible( on );
  }
}

/*!
  \class SMESHGUI_ElemInfo
  \brief Base class for the mesh element information widget.
*/

/*!
  \brief Constructor
  \param parent parent widget
*/
SMESHGUI_ElemInfo::SMESHGUI_ElemInfo( QWidget* parent )
: QWidget( parent ), myActor( 0 ), myIsElement( -1 )
{
  myFrame = new QWidget( this );
  myExtra = new ExtraWidget( this );
  QVBoxLayout* vbl = new QVBoxLayout( this );
  vbl->setMargin( 0 );
  vbl->setSpacing( 0 );
  vbl->addWidget( myFrame );
  vbl->addWidget( myExtra );
  connect( myExtra->prev, SIGNAL( clicked() ), this, SLOT( showPrevious() ) );
  connect( myExtra->next, SIGNAL( clicked() ), this, SLOT( showNext() ) );
  clear();
}

/*!
  \brief Destructor
*/
SMESHGUI_ElemInfo::~SMESHGUI_ElemInfo()
{
}

/*!
  \brief Set mesh data source (actor)
  \param actor mesh object actor
*/
void SMESHGUI_ElemInfo::setSource( SMESH_Actor* actor )
{
  if ( myActor != actor ) {
    myActor = actor;
    myIsElement = -1;
    clear();
  }
}

/*!
  \brief Show mesh element information
  \param id mesh node / element ID
  \param isElem show mesh element information if \c true or mesh node information if \c false
*/
void SMESHGUI_ElemInfo::showInfo( long id, bool isElem )
{
  QSet<long> ids;
  ids << id;
  showInfo( ids, isElem );
}

/*!
  \brief Show mesh element information
  \param ids mesh nodes / elements identifiers
  \param isElem show mesh element information if \c true or mesh node information if \c false
*/
void SMESHGUI_ElemInfo::showInfo( QSet<long> ids, bool isElem )
{
  QList<long> newIds = ids.toList();
  qSort( newIds );
  if ( myIDs == newIds && myIsElement == isElem ) return;

  myIDs = newIds;
  myIsElement = isElem;
  myIndex = 0;
  updateControls();
  information( myIDs.mid( myIndex*MAXITEMS, MAXITEMS ) );
}

/*!
  \brief Clear mesh element information widget
*/
void SMESHGUI_ElemInfo::clear()
{
  myIDs.clear();
  myIndex = 0;
  clearInternal();
  updateControls();
}

/*!
  \brief Get central area widget
  \return central widget
*/
QWidget* SMESHGUI_ElemInfo::frame() const
{
  return myFrame;
}

/*!
  \brief Get actor
  \return actor being used
*/
SMESH_Actor* SMESHGUI_ElemInfo::actor() const
{
  return myActor;
}

/*!
  \brief Get current info mode.
  \return \c true if mesh element information is shown or \c false if node information is shown
*/
bool SMESHGUI_ElemInfo::isElements() const
{
  return myIsElement;
}

/*!
  \fn void SMESHGUI_ElemInfo::information( const QList<long>& ids )
  \brief Show information on the specified nodes / elements

  This function is to be redefined in sub-classes.

  \param ids nodes / elements identifiers information is to be shown on
*/

/*!
  \brief Internal clean-up (reset widget)
*/
void SMESHGUI_ElemInfo::clearInternal()
{
}

/*!
  \brief Get node connectivity
  \param node mesh node
  \return node connectivity map
*/
SMESHGUI_ElemInfo::Connectivity SMESHGUI_ElemInfo::nodeConnectivity( const SMDS_MeshNode* node )
{
  Connectivity elmap;
  if ( node ) {
    SMDS_ElemIteratorPtr it = node->GetInverseElementIterator();
    while ( it && it->more() ) {
      const SMDS_MeshElement* ne = it->next();
      elmap[ ne->GetType() ] << ne->GetID();
    }
  }
  return elmap;
}

/*!
  \brief Format connectivity data to string representation
  \param connectivity connetivity map
  \param type element type
  \return string representation of the connectivity
*/
QString SMESHGUI_ElemInfo::formatConnectivity( Connectivity connectivity, int type )
{
  QStringList str;
  if ( connectivity.contains( type ) ) {
    QList<int> elements = connectivity[ type ];
    qSort( elements );
    foreach( int id, elements )
      str << QString::number( id );
  }
  return str.join( " " );
}

/*!
  \brief Calculate gravity center of the mesh element
  \param element mesh element
*/
SMESHGUI_ElemInfo::XYZ SMESHGUI_ElemInfo::gravityCenter( const SMDS_MeshElement* element )
{
  XYZ xyz;
  if ( element ) {
    SMDS_ElemIteratorPtr nodeIt = element->nodesIterator();
    while ( nodeIt->more() ) {
      const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
      xyz.add( node->X(), node->Y(), node->Z() );
    }
    xyz.divide( element->NbNodes() );
  }
  return xyz;
}

/*!
  \brief This slot is called from "Show Previous" button click.
  Shows information on the previous group of the items.
*/
void SMESHGUI_ElemInfo::showPrevious()
{
  myIndex = qMax( 0, myIndex-1 );
  updateControls();
  information( myIDs.mid( myIndex*MAXITEMS, MAXITEMS ) );
}

/*!
  \brief This slot is called from "Show Next" button click.
  Shows information on the next group of the items.
*/
void SMESHGUI_ElemInfo::showNext()
{
  myIndex = qMin( myIndex+1, myIDs.count() / MAXITEMS );
  updateControls();
  information( myIDs.mid( myIndex*MAXITEMS, MAXITEMS ) );
}

/*!
  \brief Update widgets state
*/
void SMESHGUI_ElemInfo::updateControls()
{
  myExtra->updateControls( myIDs.count(), myIndex );
}

/*!
  \class SMESHGUI_SimpleElemInfo
  \brief Represents mesh element information in the simple text area.
*/

/*!
  \brief Constructor
  \param parent parent widget
*/
SMESHGUI_SimpleElemInfo::SMESHGUI_SimpleElemInfo( QWidget* parent )
: SMESHGUI_ElemInfo( parent )
{
  myInfo = new QTextBrowser( frame() );
  QVBoxLayout* l = new QVBoxLayout( frame() );
  l->setMargin( 0 );
  l->addWidget( myInfo );
}

/*!
  \brief Show mesh element information
  \param ids mesh nodes / elements identifiers
*/
void SMESHGUI_SimpleElemInfo::information( const QList<long>& ids )
{
  clearInternal();
  
  if ( actor() ) {
    int precision = SMESHGUI::resourceMgr()->integerValue( "SMESH", "length_precision", 6 );
    foreach ( long id, ids ) {
      if ( !isElements() ) {
        //
        // show node info
        //
        const SMDS_MeshNode* node = actor()->GetObject()->GetMesh()->FindNode( id );
        if ( !node ) return;

        // node ID
        myInfo->append( QString( "<b>%1 #%2</b>" ).arg( tr( "NODE" ) ).arg( id ) );
        // separator
        myInfo->append( "" );
        // coordinates
        myInfo->append( QString( "<b>%1:</b> (%2, %3, %4)" ).arg( tr( "COORDINATES" ) ).
                        arg( node->X(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ).
                        arg( node->Y(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ).
                        arg( node->Z(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
        // separator
        myInfo->append( "" );
        // connectivity
        Connectivity connectivity = nodeConnectivity( node );
        if ( !connectivity.isEmpty() ) {
          myInfo->append( QString( "<b>%1:</b>" ).arg( tr( "CONNECTIVITY" ) ) );
          QString con = formatConnectivity( connectivity, SMDSAbs_0DElement );
          if ( !con.isEmpty() )
            myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "0D_ELEMENTS" ) ).arg( con ) );
          con = formatConnectivity( connectivity, SMDSAbs_Edge );
          if ( !con.isEmpty() )
            myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "EDGES" ) ).arg( con ) );
          con = formatConnectivity( connectivity, SMDSAbs_Ball );
          if ( !con.isEmpty() )
            myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "BALL_ELEMENTS" ) ).arg( con ) );
          con = formatConnectivity( connectivity, SMDSAbs_Face );
          if ( !con.isEmpty() )
            myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "FACES" ) ).arg( con ) );
          con = formatConnectivity( connectivity, SMDSAbs_Volume );
          if ( !con.isEmpty() )
            myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "VOLUMES" ) ).arg( con ) );
        }
        else {
          myInfo->append( QString( "<b>%1</b>" ).arg( tr( "FREE_NODE" ) ).arg( id ) );
        }
      }
      else {
        //
        // show element info
        // 
        const SMDS_MeshElement* e = actor()->GetObject()->GetMesh()->FindElement( id );
        if ( !e ) return;
        
        // element ID && type
        QString stype;
        switch( e->GetType() ) {
        case SMDSAbs_0DElement:
          stype = tr( "0D ELEMENT" ); break;
        case SMDSAbs_Ball:
          stype = tr( "BALL" ); break;
        case SMDSAbs_Edge:
          stype = tr( "EDGE" ); break;
        case SMDSAbs_Face:
          stype = tr( "FACE" ); break;
        case SMDSAbs_Volume:
          stype = tr( "VOLUME" ); break;
        default: 
          break;
        }
        if ( stype.isEmpty() ) return;
        myInfo->append( QString( "<b>%1 #%2</b>" ).arg( stype ).arg( id ) );
        // separator
        myInfo->append( "" );
        // geometry type
        QString gtype;
        switch( e->GetEntityType() ) {
        case SMDSEntity_Triangle:
        case SMDSEntity_Quad_Triangle:
          gtype = tr( "TRIANGLE" ); break;
        case SMDSEntity_Quadrangle:
        case SMDSEntity_Quad_Quadrangle:
        case SMDSEntity_BiQuad_Quadrangle:
          gtype = tr( "QUADRANGLE" ); break;
        case SMDSEntity_Polygon:
        case SMDSEntity_Quad_Polygon:
          gtype = tr( "POLYGON" ); break;
        case SMDSEntity_Tetra:
        case SMDSEntity_Quad_Tetra:
          gtype = tr( "TETRAHEDRON" ); break;
        case SMDSEntity_Pyramid:
        case SMDSEntity_Quad_Pyramid:
          gtype = tr( "PYRAMID" ); break;
        case SMDSEntity_Hexa:
        case SMDSEntity_Quad_Hexa:
        case SMDSEntity_TriQuad_Hexa:
          gtype = tr( "HEXAHEDRON" ); break;
        case SMDSEntity_Penta:
        case SMDSEntity_Quad_Penta:
          gtype = tr( "PRISM" ); break;
        case SMDSEntity_Hexagonal_Prism:
          gtype = tr( "HEX_PRISM" ); break;
        case SMDSEntity_Polyhedra:
        case SMDSEntity_Quad_Polyhedra:
          gtype = tr( "POLYHEDRON" ); break;
        default: 
          break;
        }
        if ( !gtype.isEmpty() )
          myInfo->append( QString( "<b>%1:</b> %2" ).arg( tr( "TYPE" ) ).arg( gtype ) );
        // quadratic flag and gravity center (any element except 0D)
        if ( e->GetEntityType() > SMDSEntity_0D && e->GetEntityType() < SMDSEntity_Ball ) {
          // quadratic flag
          myInfo->append( QString( "<b>%1?</b> %2" ).arg( tr( "QUADRATIC" ) ).arg( e->IsQuadratic() ? tr( "YES" ) : tr( "NO" ) ) );
          // separator
          myInfo->append( "" );
          // gravity center
          XYZ gc = gravityCenter( e );
          myInfo->append( QString( "<b>%1:</b> (%2, %3, %4)" ).arg( tr( "GRAVITY_CENTER" ) ).arg( gc.x() ).arg( gc.y() ).arg( gc.z() ) );
        }
        if ( const SMDS_BallElement* ball = dynamic_cast<const SMDS_BallElement*>( e )) {
          // ball diameter
          myInfo->append( QString( "<b>%1:</b> %2" ).arg( tr( "BALL_DIAMETER" ) ).arg( ball->GetDiameter() ));
        }
        // separator
        myInfo->append( "" );
        // connectivity
        SMDS_ElemIteratorPtr nodeIt = e->nodesIterator();
        for ( int idx = 1; nodeIt->more(); idx++ ) {
          const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
          // node number and ID
          myInfo->append( QString( "<b>%1 %2/%3</b> - #%4" ).arg( tr( "NODE" ) ).arg( idx ).arg( e->NbNodes() ).arg( node->GetID() ) );
          // node coordinates
          myInfo->append( QString( "<b>%1:</b> (%2, %3, %4)" ).arg( tr( "COORDINATES" ) ).
                          arg( node->X(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ).
                          arg( node->Y(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ).
                          arg( node->Z(), 0, precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          // node connectivity
          Connectivity connectivity = nodeConnectivity( node );
          if ( !connectivity.isEmpty() ) {
            myInfo->append( QString( "<b>%1:</b>" ).arg( tr( "CONNECTIVITY" ) ) );
            QString con = formatConnectivity( connectivity, SMDSAbs_0DElement );
            if ( !con.isEmpty() )
              myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "0D_ELEMENTS" ) ).arg( con ) );
            con = formatConnectivity( connectivity, SMDSAbs_Edge );
            if ( !con.isEmpty() )
              myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "EDGES" ) ).arg( con ) );
            con = formatConnectivity( connectivity, SMDSAbs_Face );
            if ( !con.isEmpty() )
              myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "FACES" ) ).arg( con ) );
            con = formatConnectivity( connectivity, SMDSAbs_Volume );
            if ( !con.isEmpty() )
              myInfo->append( QString( "- <b>%1:</b> %2" ).arg( tr( "VOLUMES" ) ).arg( con ) );
          }
          else {
            myInfo->append( QString( "<b>%1</b>" ).arg( tr( "FREE_NODE" ) ).arg( id ) );
          }
        }
      }
      // separator
      if ( ids.count() > 1 ) {
        myInfo->append( "" );
        myInfo->append( "------" );
        myInfo->append( "" );
      }
    }
  }
}

/*!
  \brief Internal clean-up (reset widget)
*/
void SMESHGUI_SimpleElemInfo::clearInternal()
{
  myInfo->clear();
}

/*!
  \class SMESHGUI_TreeElemInfo::ItemDelegate
  \brief Item delegate for tree mesh info widget
  \internal
*/
class SMESHGUI_TreeElemInfo::ItemDelegate : public QItemDelegate
{
public:
  ItemDelegate( QObject* );
  QWidget* createEditor( QWidget*, const QStyleOptionViewItem&, const QModelIndex& ) const;
};

/*!
  \brief Constructor
  \internal
*/
SMESHGUI_TreeElemInfo::ItemDelegate::ItemDelegate( QObject* parent ) : QItemDelegate( parent )
{
}

/*!
  \brief Create item editor widget
  \internal
*/
QWidget* SMESHGUI_TreeElemInfo::ItemDelegate::createEditor( QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
  QWidget* w = index.column() == 0 ? 0: QItemDelegate::createEditor( parent, option, index );
  if ( qobject_cast<QLineEdit*>( w ) ) qobject_cast<QLineEdit*>( w )->setReadOnly(  true );
  return w;
}

/*!
  \class SMESHGUI_TreeElemInfo
  \brief Represents mesh element information in the tree-like form.
*/

/*!
  \brief Constructor
  \param parent parent widget
*/
SMESHGUI_TreeElemInfo::SMESHGUI_TreeElemInfo( QWidget* parent )
: SMESHGUI_ElemInfo( parent )
{
  myInfo = new QTreeWidget( frame() );
  myInfo->setColumnCount( 2 );
  myInfo->setHeaderLabels( QStringList() << tr( "PROPERTY" ) << tr( "VALUE" ) );
  myInfo->header()->setStretchLastSection( true );
  myInfo->header()->setResizeMode( 0, QHeaderView::ResizeToContents );
  myInfo->setItemDelegate( new ItemDelegate( myInfo ) );
  QVBoxLayout* l = new QVBoxLayout( frame() );
  l->setMargin( 0 );
  l->addWidget( myInfo );
}

/*!
  \brief Show mesh element information
  \param ids mesh nodes / elements identifiers
*/
void SMESHGUI_TreeElemInfo::information( const QList<long>& ids )
{
  clearInternal();

  if ( actor() ) {
    int precision = SMESHGUI::resourceMgr()->integerValue( "SMESH", "length_precision", 6 );
    foreach ( long id, ids ) {
      if ( !isElements() ) {
        //
        // show node info
        //
        const SMDS_MeshElement* e = actor()->GetObject()->GetMesh()->FindNode( id );
        if ( !e ) return;
        const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( e );
      
        // node ID
        QTreeWidgetItem* nodeItem = createItem( 0, Bold | All );
        nodeItem->setText( 0, tr( "NODE" ) );
        nodeItem->setText( 1, QString( "#%1" ).arg( id ) );
        // coordinates
        QTreeWidgetItem* coordItem = createItem( nodeItem, Bold );
        coordItem->setText( 0, tr( "COORDINATES" ) );
        QTreeWidgetItem* xItem = createItem( coordItem );
        xItem->setText( 0, "X" );
        xItem->setText( 1, QString::number( node->X(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
        QTreeWidgetItem* yItem = createItem( coordItem );
        yItem->setText( 0, "Y" );
        yItem->setText( 1, QString::number( node->Y(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
        QTreeWidgetItem* zItem = createItem( coordItem );
        zItem->setText( 0, "Z" );
        zItem->setText( 1, QString::number( node->Z(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
        // connectivity
        QTreeWidgetItem* conItem = createItem( nodeItem, Bold );
        conItem->setText( 0, tr( "CONNECTIVITY" ) );
        Connectivity connectivity = nodeConnectivity( node );
        if ( !connectivity.isEmpty() ) {
          QString con = formatConnectivity( connectivity, SMDSAbs_0DElement );
          if ( !con.isEmpty() ) {
            QTreeWidgetItem* i = createItem( conItem );
            i->setText( 0, tr( "0D_ELEMENTS" ) );
            i->setText( 1, con );
          }
          con = formatConnectivity( connectivity, SMDSAbs_Ball );
          if ( !con.isEmpty() ) {
            QTreeWidgetItem* i = createItem( conItem );
            i->setText( 0, tr( "BALL_ELEMENTS" ) );
            i->setText( 1, con );
          }
          con = formatConnectivity( connectivity, SMDSAbs_Edge );
          if ( !con.isEmpty() ) {
            QTreeWidgetItem* i = createItem( conItem );
            i->setText( 0, tr( "EDGES" ) );
            i->setText( 1, con );
          }
          con = formatConnectivity( connectivity, SMDSAbs_Face );
          if ( !con.isEmpty() ) {
            QTreeWidgetItem* i = createItem( conItem );
            i->setText( 0, tr( "FACES" ) );
            i->setText( 1, con );
          }
          con = formatConnectivity( connectivity, SMDSAbs_Volume );
          if ( !con.isEmpty() ) {
            QTreeWidgetItem* i = createItem( conItem );
            i->setText( 0, tr( "VOLUMES" ) );
            i->setText( 1, con );
          }
        }
        else {
          conItem->setText( 1, tr( "FREE_NODE" ) );
        }
        // node position
        int shapeID = node->getshapeId();
        if ( shapeID > 0 )
        {
          SMDS_PositionPtr        pos = node->GetPosition();
          SMDS_TypeOfPosition posType = pos->GetTypeOfPosition();
          QString shapeType;
          double u,v;
          switch ( posType ) {
          case SMDS_TOP_EDGE:   shapeType = tr( "EDGE" );
            u = static_cast<SMDS_EdgePosition*>( pos )->GetUParameter();
            break;
          case SMDS_TOP_FACE:   shapeType = tr( "FACE" );
            u = static_cast<SMDS_FacePosition*>( pos )->GetUParameter();
            v = static_cast<SMDS_FacePosition*>( pos )->GetVParameter();
            break;
          case SMDS_TOP_VERTEX: shapeType = tr( "VERTEX" ); break;
          default:              shapeType = tr( "SOLID" );
          }
          QTreeWidgetItem* posItem = createItem( nodeItem, Bold );
          posItem->setText( 0, tr("NODE_POSITION") );
          posItem->setText( 1, (shapeType + " #%1").arg( shapeID ));
          if ( posType == SMDS_TOP_EDGE || posType == SMDS_TOP_FACE ) {
            QTreeWidgetItem* uItem = createItem( posItem );
            uItem->setText( 0, tr("U_POSITION") );
            uItem->setText( 1, QString::number( u, precision > 0 ? 'f' : 'g', qAbs( precision )));
            if ( posType == SMDS_TOP_FACE ) {
              QTreeWidgetItem* vItem = createItem( posItem );
              vItem->setText( 0, tr("V_POSITION") );
              vItem->setText( 1, QString::number( v, precision > 0 ? 'f' : 'g', qAbs( precision )));
            }
          }
        }
      }
      else {
        //
        // show element info
        // 
        const SMDS_MeshElement* e = actor()->GetObject()->GetMesh()->FindElement( id );
        if ( !e ) return;
        
        // element ID && type
        QString stype;
        switch( e->GetType() ) {
        case SMDSAbs_0DElement:
          stype = tr( "0D ELEMENT" ); break;
        case SMDSAbs_Ball:
          stype = tr( "BALL" ); break;
        case SMDSAbs_Edge:
          stype = tr( "EDGE" ); break;
        case SMDSAbs_Face:
          stype = tr( "FACE" ); break;
        case SMDSAbs_Volume:
          stype = tr( "VOLUME" ); break;
        default: 
          break;
        }
        if ( stype.isEmpty() ) return;
        QTreeWidgetItem* elemItem = createItem( 0, Bold | All );
        elemItem->setText( 0, stype );
        elemItem->setText( 1, QString( "#%1" ).arg( id ) );
        // geometry type
        QString gtype;
        switch( e->GetEntityType() ) {
        case SMDSEntity_Triangle:
        case SMDSEntity_Quad_Triangle:
          gtype = tr( "TRIANGLE" ); break;
        case SMDSEntity_Quadrangle:
        case SMDSEntity_Quad_Quadrangle:
        case SMDSEntity_BiQuad_Quadrangle:
          gtype = tr( "QUADRANGLE" ); break;
        case SMDSEntity_Polygon:
        case SMDSEntity_Quad_Polygon:
          gtype = tr( "POLYGON" ); break;
        case SMDSEntity_Tetra:
        case SMDSEntity_Quad_Tetra:
          gtype = tr( "TETRAHEDRON" ); break;
        case SMDSEntity_Pyramid:
        case SMDSEntity_Quad_Pyramid:
          gtype = tr( "PYRAMID" ); break;
        case SMDSEntity_Hexa:
        case SMDSEntity_Quad_Hexa:
        case SMDSEntity_TriQuad_Hexa:
          gtype = tr( "HEXAHEDRON" ); break;
        case SMDSEntity_Penta:
        case SMDSEntity_Quad_Penta:
          gtype = tr( "PRISM" ); break;
        case SMDSEntity_Hexagonal_Prism:
          gtype = tr( "HEX_PRISM" ); break;
        case SMDSEntity_Polyhedra:
        case SMDSEntity_Quad_Polyhedra:
          gtype = tr( "POLYHEDRON" ); break;
        default: 
          break;
        }
        if ( !gtype.isEmpty() ) {
          QTreeWidgetItem* typeItem = createItem( elemItem, Bold );
          typeItem->setText( 0, tr( "TYPE" ) );
          typeItem->setText( 1, gtype );
        }
        // quadratic flag and gravity center (any element except 0D)
        if ( e->GetEntityType() > SMDSEntity_0D && e->GetEntityType() < SMDSEntity_Ball ) {
          // quadratic flag
          QTreeWidgetItem* quadItem = createItem( elemItem, Bold );
          quadItem->setText( 0, tr( "QUADRATIC" ) );
          quadItem->setText( 1, e->IsQuadratic() ? tr( "YES" ) : tr( "NO" ) );
          // gravity center
          XYZ gc = gravityCenter( e );
          QTreeWidgetItem* gcItem = createItem( elemItem, Bold );
          gcItem->setText( 0, tr( "GRAVITY_CENTER" ) );
          QTreeWidgetItem* xItem = createItem( gcItem );
          xItem->setText( 0, "X" );
          xItem->setText( 1, QString::number( gc.x(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          QTreeWidgetItem* yItem = createItem( gcItem );
          yItem->setText( 0, "Y" );
          yItem->setText( 1, QString::number( gc.y(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          QTreeWidgetItem* zItem = createItem( gcItem );
          zItem->setText( 0, "Z" );
          zItem->setText( 1, QString::number( gc.z(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
        }
        if ( const SMDS_BallElement* ball = dynamic_cast<const SMDS_BallElement*>( e )) {
          // ball diameter
          QTreeWidgetItem* diamItem = createItem( elemItem, Bold );
          diamItem->setText( 0, tr( "BALL_DIAMETER" ) );
          diamItem->setText( 1, QString( "%1" ).arg( ball->GetDiameter() ));
        }
        // connectivity
        QTreeWidgetItem* conItem = createItem( elemItem, Bold );
        conItem->setText( 0, tr( "CONNECTIVITY" ) );
        SMDS_ElemIteratorPtr nodeIt = e->nodesIterator();
        for ( int idx = 1; nodeIt->more(); idx++ ) {
          const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
          // node number and ID
          QTreeWidgetItem* nodeItem = createItem( conItem, Bold );
          nodeItem->setText( 0, QString( "%1 %2 / %3" ).arg( tr( "NODE" ) ).arg( idx ).arg( e->NbNodes() ) );
          nodeItem->setText( 1, QString( "#%1" ).arg( node->GetID() ) );
          nodeItem->setExpanded( false );
          // node coordinates
          QTreeWidgetItem* coordItem = createItem( nodeItem );
          coordItem->setText( 0, tr( "COORDINATES" ) );
          QTreeWidgetItem* xItem = createItem( coordItem );
          xItem->setText( 0, "X" );
          xItem->setText( 1, QString::number( node->X(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          QTreeWidgetItem* yItem = createItem( coordItem );
          yItem->setText( 0, "Y" );
          yItem->setText( 1, QString::number( node->Y(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          QTreeWidgetItem* zItem = createItem( coordItem );
          zItem->setText( 0, "Z" );
          zItem->setText( 1, QString::number( node->Z(), precision > 0 ? 'f' : 'g', qAbs( precision ) ) );
          // node connectivity
          QTreeWidgetItem* nconItem = createItem( nodeItem );
          nconItem->setText( 0, tr( "CONNECTIVITY" ) );
          Connectivity connectivity = nodeConnectivity( node );
          if ( !connectivity.isEmpty() ) {
            QString con = formatConnectivity( connectivity, SMDSAbs_0DElement );
            if ( !con.isEmpty() ) {
              QTreeWidgetItem* i = createItem( nconItem );
              i->setText( 0, tr( "0D_ELEMENTS" ) );
              i->setText( 1, con );
            }
            con = formatConnectivity( connectivity, SMDSAbs_Edge );
            if ( !con.isEmpty() ) {
              QTreeWidgetItem* i = createItem( nconItem );
              i->setText( 0, tr( "EDGES" ) );
              i->setText( 1, con );
            }
            con = formatConnectivity( connectivity, SMDSAbs_Ball );
            if ( !con.isEmpty() ) {
              QTreeWidgetItem* i = createItem( nconItem );
              i->setText( 0, tr( "BALL_ELEMENTS" ) );
              i->setText( 1, con );
            }
            con = formatConnectivity( connectivity, SMDSAbs_Face );
            if ( !con.isEmpty() ) {
              QTreeWidgetItem* i = createItem( nconItem );
              i->setText( 0, tr( "FACES" ) );
              i->setText( 1, con );
            }
            con = formatConnectivity( connectivity, SMDSAbs_Volume );
            if ( !con.isEmpty() ) {
              QTreeWidgetItem* i = createItem( nconItem );
              i->setText( 0, tr( "VOLUMES" ) );
              i->setText( 1, con );
            }
          }
        }
      }
    }
  }
}

/*!
  \brief Internal clean-up (reset widget)
*/
void SMESHGUI_TreeElemInfo::clearInternal()
{
  myInfo->clear();
  myInfo->repaint();
}

/*!
  \brief Create new tree item.
  \param parent parent tree widget item
  \param flags item flag
  \return new tree widget item
*/
QTreeWidgetItem* SMESHGUI_TreeElemInfo::createItem( QTreeWidgetItem* parent, int flags )
{
  QTreeWidgetItem* item;
  if ( parent )
    item = new QTreeWidgetItem( parent );
  else
    item = new QTreeWidgetItem( myInfo );

  item->setFlags( item->flags() | Qt::ItemIsEditable );

  QFont f = item->font( 0 );
  f.setBold( true );
  for ( int i = 0; i < myInfo->columnCount(); i++ ) {
    if ( ( flags & Bold ) && ( i == 0 || flags & All ) )
      item->setFont( i, f );
  }

  item->setExpanded( true );
  return item;
}

/*!
  \class GrpComputor
  \brief Mesh information computer
  \internal
  
  The class is created for different computation operation. Currently it is used
  to compute number of underlying nodes for the groups.
*/

/*!
  \brief Contructor
*/
GrpComputor::GrpComputor( SMESH::SMESH_GroupBase_ptr grp, QTreeWidgetItem* item, QObject* parent )
  : QObject( parent ), myItem( item )
{
  myGroup = SMESH::SMESH_GroupBase::_narrow( grp );
}

/*!
  \brief Compute function
*/
void GrpComputor::compute()
{
  if ( !CORBA::is_nil( myGroup ) && myItem ) {
    QTreeWidgetItem* item = myItem;
    myItem = 0;
    int nbNodes = myGroup->GetNumberOfNodes();
    item->treeWidget()->removeItemWidget( item, 1 );
    item->setText( 1, QString::number( nbNodes ));
  }
}

/*!
  \class SMESHGUI_AddInfo
  \brief The wigdet shows additional information on the mesh object.
*/

/*!
  \brief Constructor
  \param parent parent widget
*/
SMESHGUI_AddInfo::SMESHGUI_AddInfo( QWidget* parent )
: QTreeWidget( parent )
{
  setColumnCount( 2 );
  header()->setStretchLastSection( true );
  header()->setResizeMode( 0, QHeaderView::ResizeToContents );
  header()->hide();
}

/*!
  \brief Destructor
*/
SMESHGUI_AddInfo::~SMESHGUI_AddInfo()
{
}

/*!
  \brief Show additional information on the selected object
  \param obj object being processed (mesh, sub-mesh, group, ID source)
*/
void SMESHGUI_AddInfo::showInfo( SMESH::SMESH_IDSource_ptr obj )
{
  setProperty( "group_index", 0 );
  setProperty( "submesh_index",  0 );
  myComputors.clear();
  clear();

  if ( CORBA::is_nil( obj ) ) return;

  _PTR(SObject) sobj = SMESH::ObjectToSObject( obj );
  if ( !sobj ) return;

  // name
  QTreeWidgetItem* nameItem = createItem( 0, Bold | All );
  nameItem->setText( 0, tr( "NAME" ) );
  nameItem->setText( 1, sobj->GetName().c_str() );
  
  SMESH::SMESH_Mesh_var      aMesh    = SMESH::SMESH_Mesh::_narrow( obj );
  SMESH::SMESH_subMesh_var   aSubMesh = SMESH::SMESH_subMesh::_narrow( obj );
  SMESH::SMESH_GroupBase_var aGroup   = SMESH::SMESH_GroupBase::_narrow( obj );
  
  if ( !aMesh->_is_nil() )
    meshInfo( aMesh, nameItem );
  else if ( !aSubMesh->_is_nil() )
    subMeshInfo( aSubMesh, nameItem );
  else if ( !aGroup->_is_nil() )
    groupInfo( aGroup.in(), nameItem );
}

/*!
  \brief Create new tree item.
  \param parent parent tree widget item
  \param flags item flag
  \return new tree widget item
*/
QTreeWidgetItem* SMESHGUI_AddInfo::createItem( QTreeWidgetItem* parent, int flags )
{
  QTreeWidgetItem* item;

  if ( parent )
    item = new QTreeWidgetItem( parent );
  else
    item = new QTreeWidgetItem( this );

  //item->setFlags( item->flags() | Qt::ItemIsEditable );

  QFont f = item->font( 0 );
  f.setBold( true );
  for ( int i = 0; i < columnCount(); i++ ) {
    if ( ( flags & Bold ) && ( i == 0 || flags & All ) )
      item->setFont( i, f );
  }

  item->setExpanded( true );
  return item;
}

/*!
  \brief Show mesh info
  \param mesh mesh object
  \param parent parent tree item
*/
void SMESHGUI_AddInfo::meshInfo( SMESH::SMESH_Mesh_ptr mesh, QTreeWidgetItem* parent )
{
  // type
  GEOM::GEOM_Object_var shape = mesh->GetShapeToMesh();
  SALOME_MED::MedFileInfo* inf = mesh->GetMEDFileInfo();
  QTreeWidgetItem* typeItem = createItem( parent, Bold );
  typeItem->setText( 0, tr( "TYPE" ) );
  if ( !CORBA::is_nil( shape ) ) {
    typeItem->setText( 1, tr( "MESH_ON_GEOMETRY" ) );
    _PTR(SObject) sobj = SMESH::ObjectToSObject( shape );
    if ( sobj ) {
      QTreeWidgetItem* gobjItem = createItem( typeItem );
      gobjItem->setText( 0, tr( "GEOM_OBJECT" ) );
      gobjItem->setText( 1, sobj->GetName().c_str() );
    }
  }
  else if ( strlen( (char*)inf->fileName ) > 0 ) {
    typeItem->setText( 1, tr( "MESH_FROM_FILE" ) );
    QTreeWidgetItem* fileItem = createItem( typeItem );
    fileItem->setText( 0, tr( "FILE_NAME" ) );
    fileItem->setText( 1, (char*)inf->fileName );
  }
  else {
    typeItem->setText( 1, tr( "STANDALONE_MESH" ) );
  }
  
  // groups
  myGroups = mesh->GetGroups();
  showGroups();

  // sub-meshes
  mySubMeshes = mesh->GetSubMeshes();
  showSubMeshes();
}

/*!
  \brief Show sub-mesh info
  \param subMesh sub-mesh object
  \param parent parent tree item
*/
void SMESHGUI_AddInfo::subMeshInfo( SMESH::SMESH_subMesh_ptr subMesh, QTreeWidgetItem* parent )
{
  bool isShort = parent->parent() != 0;

  if ( !isShort ) {
    // parent mesh
    _PTR(SObject) sobj = SMESH::ObjectToSObject( subMesh->GetFather() );
    if ( sobj ) {
      QTreeWidgetItem* nameItem = createItem( parent, Bold );
      nameItem->setText( 0, tr( "PARENT_MESH" ) );
      nameItem->setText( 1, sobj->GetName().c_str() );
    }
  }
  
  // shape
  GEOM::GEOM_Object_var gobj = subMesh->GetSubShape();
  _PTR(SObject) sobj = SMESH::ObjectToSObject( gobj );
  if ( sobj ) {
    QTreeWidgetItem* gobjItem = createItem( parent, Bold );
    gobjItem->setText( 0, tr( "GEOM_OBJECT" ) );
    gobjItem->setText( 1, sobj->GetName().c_str() );
  }
}

/*!
  \brief Show group info
  \param grp mesh group object
  \param parent parent tree item
*/
void SMESHGUI_AddInfo::groupInfo( SMESH::SMESH_GroupBase_ptr grp, QTreeWidgetItem* parent )
{
  bool isShort = parent->parent() != 0;

  SMESH::SMESH_Group_var         aStdGroup  = SMESH::SMESH_Group::_narrow( grp );
  SMESH::SMESH_GroupOnGeom_var   aGeomGroup = SMESH::SMESH_GroupOnGeom::_narrow( grp );
  SMESH::SMESH_GroupOnFilter_var aFltGroup  = SMESH::SMESH_GroupOnFilter::_narrow( grp );

  if ( !isShort ) {
    // parent mesh
    _PTR(SObject) sobj = SMESH::ObjectToSObject( grp->GetMesh() );
    if ( sobj ) {
      QTreeWidgetItem* nameItem = createItem( parent, Bold );
      nameItem->setText( 0, tr( "PARENT_MESH" ) );
      nameItem->setText( 1, sobj->GetName().c_str() );
    }
  }

  // type : group on geometry, standalone group, group on filter
  QTreeWidgetItem* typeItem = createItem( parent, Bold );
  typeItem->setText( 0, tr( "TYPE" ) );
  if ( !CORBA::is_nil( aStdGroup ) ) {
    typeItem->setText( 1, tr( "STANDALONE_GROUP" ) );
  }
  else if ( !CORBA::is_nil( aGeomGroup ) ) {
    typeItem->setText( 1, tr( "GROUP_ON_GEOMETRY" ) );
    GEOM::GEOM_Object_var gobj = aGeomGroup->GetShape();
    _PTR(SObject) sobj = SMESH::ObjectToSObject( gobj );
    if ( sobj ) {
      QTreeWidgetItem* gobjItem = createItem( typeItem );
      gobjItem->setText( 0, tr( "GEOM_OBJECT" ) );
      gobjItem->setText( 1, sobj->GetName().c_str() );
    }
  }
  else if ( !CORBA::is_nil( aFltGroup ) ) {
    typeItem->setText( 1, tr( "GROUP_ON_FILTER" ) );
  }

  if ( !isShort ) {
    // entity type
    QString etype = tr( "UNKNOWN" );
    switch( grp->GetType() ) {
    case SMESH::NODE:
      etype = tr( "NODE" );
      break;
    case SMESH::EDGE:
      etype = tr( "EDGE" );
      break;
    case SMESH::FACE:
      etype = tr( "FACE" );
      break;
    case SMESH::VOLUME:
      etype = tr( "VOLUME" );
      break;
    case SMESH::ELEM0D:
      etype = tr( "0DELEM" );
      break;
    case SMESH::BALL:
      etype = tr( "BALL" );
      break;
    default:
      break;
    }
    QTreeWidgetItem* etypeItem = createItem( parent, Bold );
    etypeItem->setText( 0, tr( "ENTITY_TYPE" ) );
    etypeItem->setText( 1, etype );
  }

  // size
  QTreeWidgetItem* sizeItem = createItem( parent, Bold );
  sizeItem->setText( 0, tr( "SIZE" ) );
  sizeItem->setText( 1, QString::number( grp->Size() ) );

  // color
  SALOMEDS::Color color = grp->GetColor();
  QTreeWidgetItem* colorItem = createItem( parent, Bold );
  colorItem->setText( 0, tr( "COLOR" ) );
  colorItem->setBackground( 1, QBrush( QColor( color.R*255., color.G*255., color.B*255.) ) );

  // nb of underlying nodes
  if ( grp->GetType() != SMESH::NODE) {
    QTreeWidgetItem* nodesItem = createItem( parent, Bold );
    nodesItem->setText( 0, tr( "NB_NODES" ) );
    int nbNodesLimit = SMESHGUI::resourceMgr()->integerValue( "SMESH", "info_groups_nodes_limit", 100000 );
    SMESH::SMESH_Mesh_var mesh = grp->GetMesh();
    bool meshLoaded = mesh->IsLoaded();
    bool toShowNodes = ( grp->IsNodeInfoAvailable() || nbNodesLimit <= 0 || grp->Size() <= nbNodesLimit );
    if ( toShowNodes && meshLoaded ) {
      // already calculated and up-to-date
      nodesItem->setText( 1, QString::number( grp->GetNumberOfNodes() ) );
    }
    else {
      QPushButton* btn = new QPushButton( tr( meshLoaded ? "COMPUTE" : "LOAD"), this );
      setItemWidget( nodesItem, 1, btn );
      GrpComputor* comp = new GrpComputor( grp, nodesItem, this ); 
      connect( btn, SIGNAL( clicked() ), comp, SLOT( compute() ) );
      myComputors.append( comp );
      if ( !meshLoaded )
        connect( btn, SIGNAL( clicked() ), this, SLOT( changeLoadToCompute() ) );
    }
  }
}

void SMESHGUI_AddInfo::showGroups()
{
  myComputors.clear();

  QTreeWidgetItem* parent = topLevelItemCount() > 0 ? topLevelItem( 0 ) : 0; // parent should be first top level item
  if ( !parent ) return;

  int idx = property( "group_index" ).toInt();

  QTreeWidgetItem* itemGroups = 0;
  for ( int i = 0; i < parent->childCount() && !itemGroups; i++ ) {
    if ( parent->child( i )->data( 0, Qt::UserRole ).toInt() == GROUPS_ID ) {
      itemGroups = parent->child( i );
      ExtraWidget* extra = dynamic_cast<ExtraWidget*>( itemWidget( itemGroups, 1 ) );
      if ( extra )
        extra->updateControls( myGroups->length(), idx );
      while ( itemGroups->childCount() ) delete itemGroups->child( 0 ); // clear child items
    }
  }

  QMap<int, QTreeWidgetItem*> grpItems;
  for ( int i = idx*MAXITEMS ; i < qMin( (idx+1)*MAXITEMS, (int)myGroups->length() ); i++ ) {
    SMESH::SMESH_GroupBase_var grp = myGroups[i];
    if ( CORBA::is_nil( grp ) ) continue;
    _PTR(SObject) grpSObj = SMESH::ObjectToSObject( grp );
    if ( !grpSObj ) continue;

    int grpType = grp->GetType();

    if ( !itemGroups ) {
      // create top-level groups container item
      itemGroups = createItem( parent, Bold | All );
      itemGroups->setText( 0, tr( "GROUPS" ) );
      itemGroups->setData( 0, Qt::UserRole, GROUPS_ID );

      // total number of groups > 10, show extra widgets for info browsing
      if ( myGroups->length() > MAXITEMS ) {
        ExtraWidget* extra = new ExtraWidget( this, true );
        connect( extra->prev, SIGNAL( clicked() ), this, SLOT( showPreviousGroups() ) );
        connect( extra->next, SIGNAL( clicked() ), this, SLOT( showNextGroups() ) );
        setItemWidget( itemGroups, 1, extra );
        extra->updateControls( myGroups->length(), idx );
      }
    }

    if ( grpItems.find( grpType ) == grpItems.end() ) {
      grpItems[ grpType ] = createItem( itemGroups, Bold | All );
      grpItems[ grpType ]->setText( 0, tr( QString( "GROUPS_%1" ).arg( grpType ).toLatin1().constData() ) );
      itemGroups->insertChild( grpType-1, grpItems[ grpType ] );
    }
  
    // group name
    QTreeWidgetItem* grpNameItem = createItem( grpItems[ grpType ] );
    grpNameItem->setText( 0, QString( grpSObj->GetName().c_str() ).trimmed() ); // name is trimmed

    // group info
    groupInfo( grp.in(), grpNameItem );
  }
}

void SMESHGUI_AddInfo::showSubMeshes()
{
  QTreeWidgetItem* parent = topLevelItemCount() > 0 ? topLevelItem( 0 ) : 0; // parent should be first top level item
  if ( !parent ) return;

  int idx = property( "submesh_index" ).toInt();

  QTreeWidgetItem* itemSubMeshes = 0;
  for ( int i = 0; i < parent->childCount() && !itemSubMeshes; i++ ) {
    if ( parent->child( i )->data( 0, Qt::UserRole ).toInt() == SUBMESHES_ID ) {
      itemSubMeshes = parent->child( i );
      ExtraWidget* extra = dynamic_cast<ExtraWidget*>( itemWidget( itemSubMeshes, 1 ) );
      if ( extra )
        extra->updateControls( mySubMeshes->length(), idx );
      while ( itemSubMeshes->childCount() ) delete itemSubMeshes->child( 0 ); // clear child items
    }
  }

  QMap<int, QTreeWidgetItem*> smItems;
  for ( int i = idx*MAXITEMS ; i < qMin( (idx+1)*MAXITEMS, (int)mySubMeshes->length() ); i++ ) {
    SMESH::SMESH_subMesh_var sm = mySubMeshes[i];
    if ( CORBA::is_nil( sm ) ) continue;
    _PTR(SObject) smSObj = SMESH::ObjectToSObject( sm );
    if ( !smSObj ) continue;
    
    GEOM::GEOM_Object_var gobj = sm->GetSubShape();
    if ( CORBA::is_nil(gobj ) ) continue;
    
    int smType = gobj->GetShapeType();
    if ( smType == GEOM::COMPSOLID ) smType = GEOM::COMPOUND;

    if ( !itemSubMeshes ) {
      itemSubMeshes = createItem( parent, Bold | All );
      itemSubMeshes->setText( 0, tr( "SUBMESHES" ) );
      itemSubMeshes->setData( 0, Qt::UserRole, SUBMESHES_ID );

      // total number of sub-meshes > 10, show extra widgets for info browsing
      if ( mySubMeshes->length() > MAXITEMS ) {
        ExtraWidget* extra = new ExtraWidget( this, true );
        connect( extra->prev, SIGNAL( clicked() ), this, SLOT( showPreviousSubMeshes() ) );
        connect( extra->next, SIGNAL( clicked() ), this, SLOT( showNextSubMeshes() ) );
        setItemWidget( itemSubMeshes, 1, extra );
        extra->updateControls( mySubMeshes->length(), idx );
      }
    }
         
    if ( smItems.find( smType ) == smItems.end() ) {
      smItems[ smType ] = createItem( itemSubMeshes, Bold | All );
      smItems[ smType ]->setText( 0, tr( QString( "SUBMESHES_%1" ).arg( smType ).toLatin1().constData() ) );
      itemSubMeshes->insertChild( smType, smItems[ smType ] );
    }
    
    // submesh name
    QTreeWidgetItem* smNameItem = createItem( smItems[ smType ] );
    smNameItem->setText( 0, QString( smSObj->GetName().c_str() ).trimmed() ); // name is trimmed
    
    // submesh info
    subMeshInfo( sm.in(), smNameItem );
  }
}

/*!
 * \brief Change button label of "nb underlying node" group from "Load" to "Compute"
 */
void SMESHGUI_AddInfo::changeLoadToCompute()
{
  for ( int i = 0; i < myComputors.count(); ++i )
  {
    if ( QTreeWidgetItem* item = myComputors[i]->getItem() )
    {
      if ( QPushButton* btn = qobject_cast<QPushButton*>( itemWidget ( item, 1 ) ) )
        btn->setText( tr("COMPUTE") );
    }
  }
}

void SMESHGUI_AddInfo::showPreviousGroups()
{
  int idx = property( "group_index" ).toInt();
  setProperty( "group_index", idx-1 );
  showGroups();
}

void SMESHGUI_AddInfo::showNextGroups()
{
  int idx = property( "group_index" ).toInt();
  setProperty( "group_index", idx+1 );
  showGroups();
}

void SMESHGUI_AddInfo::showPreviousSubMeshes()
{
  int idx = property( "submesh_index" ).toInt();
  setProperty( "submesh_index", idx-1 );
  showSubMeshes();
}

void SMESHGUI_AddInfo::showNextSubMeshes()
{
  int idx = property( "submesh_index" ).toInt();
  setProperty( "submesh_index", idx+1 );
  showSubMeshes();
}

/*!
  \class SMESHGUI_MeshInfoDlg
  \brief Mesh information dialog box
*/

/*!
  \brief Constructor
  \param parent parent widget
  \param page specifies the dialog page to be shown at the start-up
*/
SMESHGUI_MeshInfoDlg::SMESHGUI_MeshInfoDlg( QWidget* parent, int page )
: QDialog( parent ), myActor( 0 )
{
  setModal( false );
  setAttribute( Qt::WA_DeleteOnClose, true );
  setWindowTitle( tr( "MESH_INFO" ) );
  setSizeGripEnabled( true );

  myTabWidget = new QTabWidget( this );

  // base info 

  myBaseInfo = new SMESHGUI_MeshInfo( myTabWidget );
  myTabWidget->addTab( myBaseInfo, tr( "BASE_INFO" ) );

  // elem info 
  
  QWidget* w = new QWidget( myTabWidget );

  myMode = new QButtonGroup( this );
  myMode->addButton( new QRadioButton( tr( "NODE_MODE" ), w ), NodeMode );
  myMode->addButton( new QRadioButton( tr( "ELEM_MODE" ), w ), ElemMode );
  myMode->button( NodeMode )->setChecked( true );
  myID = new QLineEdit( w );
  myID->setValidator( new SMESHGUI_IdValidator( this ) );

  int mode = SMESHGUI::resourceMgr()->integerValue( "SMESH", "mesh_elem_info", 1 );
  mode = qMin( 1, qMax( 0, mode ) );
  
  if ( mode == 0 ) 
    myElemInfo = new SMESHGUI_SimpleElemInfo( w );
  else
    myElemInfo = new SMESHGUI_TreeElemInfo( w );

  QGridLayout* elemLayout = new QGridLayout( w );
  elemLayout->setMargin( MARGIN );
  elemLayout->setSpacing( SPACING );
  elemLayout->addWidget( myMode->button( NodeMode ), 0, 0 );
  elemLayout->addWidget( myMode->button( ElemMode ), 0, 1 );
  elemLayout->addWidget( myID, 0, 2 );
  elemLayout->addWidget( myElemInfo, 1, 0, 1, 3 );
  
  myTabWidget->addTab( w, tr( "ELEM_INFO" ) );

  // additional info

  myAddInfo = new SMESHGUI_AddInfo( myTabWidget );
  myTabWidget->addTab( myAddInfo, tr( "ADDITIONAL_INFO" ) );

  // buttons

  QPushButton* okBtn = new QPushButton( tr( "SMESH_BUT_OK" ), this );
  okBtn->setAutoDefault( true );
  okBtn->setDefault( true );
  okBtn->setFocus();
  QPushButton* helpBtn = new QPushButton( tr( "SMESH_BUT_HELP" ), this );
  helpBtn->setAutoDefault( true );

  QHBoxLayout* btnLayout = new QHBoxLayout;
  btnLayout->setSpacing( SPACING );
  btnLayout->setMargin( 0 );

  btnLayout->addWidget( okBtn );
  btnLayout->addStretch( 10 );
  btnLayout->addWidget( helpBtn );

  QVBoxLayout* l = new QVBoxLayout ( this );
  l->setMargin( MARGIN );
  l->setSpacing( SPACING );
  l->addWidget( myTabWidget );
  l->addLayout( btnLayout );

  myTabWidget->setCurrentIndex( qMax( (int)BaseInfo, qMin( (int)ElemInfo, page ) ) );

  connect( okBtn,       SIGNAL( clicked() ),              this, SLOT( reject() ) );
  connect( helpBtn,     SIGNAL( clicked() ),              this, SLOT( help() ) );
  connect( myTabWidget, SIGNAL( currentChanged( int  ) ), this, SLOT( updateSelection() ) );
  connect( myMode,      SIGNAL( buttonClicked( int  ) ),  this, SLOT( modeChanged() ) );
  connect( myID,        SIGNAL( textEdited( QString  ) ), this, SLOT( idChanged() ) );
  connect( SMESHGUI::GetSMESHGUI(),  SIGNAL( SignalDeactivateActiveDialog() ), this, SLOT( deactivate() ) );
  connect( SMESHGUI::GetSMESHGUI(),  SIGNAL( SignalCloseAllDialogs() ),        this, SLOT( reject() ) );

  updateSelection();
}

/*!
  \brief Destructor
*/
SMESHGUI_MeshInfoDlg::~SMESHGUI_MeshInfoDlg()
{
}

/*!
  \brief Show mesh information
  \param IO interactive object
*/
void SMESHGUI_MeshInfoDlg::showInfo( const Handle(SALOME_InteractiveObject)& IO )
{
  SMESH::SMESH_IDSource_var obj = SMESH::IObjectToInterface<SMESH::SMESH_IDSource>( IO );
  if ( !CORBA::is_nil( obj ) ) {
    myBaseInfo->showInfo( obj );
    myAddInfo->showInfo( obj );

    myActor = SMESH::FindActorByEntry( IO->getEntry() );
    SVTK_Selector* selector = SMESH::GetViewWindow()->GetSelector();
    QString ID;
    int nb = 0;
    if ( myActor && selector ) {
      nb = myMode->checkedId() == NodeMode ? 
        SMESH::GetNameOfSelectedElements( selector, IO, ID ) :
        SMESH::GetNameOfSelectedNodes( selector, IO, ID );
    }
    myElemInfo->setSource( myActor ) ;
    if ( nb > 0 ) {
      myID->setText( ID.trimmed() );
      QSet<long> ids;
      QStringList idTxt = ID.split( " ", QString::SkipEmptyParts );
      foreach ( ID, idTxt )
        ids << ID.trimmed().toLong();
      myElemInfo->showInfo( ids, myMode->checkedId() == ElemMode );
    }
    else {
      myID->clear();
      myElemInfo->clear();
    }
  }
}

/*!
  \brief Perform clean-up actions on the dialog box closing.
*/
void SMESHGUI_MeshInfoDlg::reject()
{
  LightApp_SelectionMgr* selMgr = SMESHGUI::selectionMgr();
  selMgr->clearFilters();
  SMESH::SetPointRepresentation( false );
  if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow() )
    aViewWindow->SetSelectionMode( ActorSelection );
  QDialog::reject();
}

/*!
  \brief Process keyboard event
  \param e key press event
*/
void SMESHGUI_MeshInfoDlg::keyPressEvent( QKeyEvent* e )
{
  QDialog::keyPressEvent( e );
  if ( !e->isAccepted() && e->key() == Qt::Key_F1 ) {
    e->accept();
    help();
  }
}

/*!
  \brief Reactivate dialog box, when mouse pointer goes into it.
*/
void SMESHGUI_MeshInfoDlg::enterEvent( QEvent* )
{
  //activate();
}

/*!
  \brief Setup selection mode depending on the current dialog box state.
*/
void SMESHGUI_MeshInfoDlg::updateSelection()
{
  LightApp_SelectionMgr* selMgr = SMESHGUI::selectionMgr();

  disconnect( selMgr, 0, this, 0 );
  selMgr->clearFilters();

  if ( myTabWidget->currentIndex() == BaseInfo || myTabWidget->currentIndex() == AddInfo ) {
    SMESH::SetPointRepresentation( false );
    if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow() )
      aViewWindow->SetSelectionMode( ActorSelection );
  }
  else {
    if ( myMode->checkedId() == NodeMode ) {
      SMESH::SetPointRepresentation( true );
      if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow() )
        aViewWindow->SetSelectionMode( NodeSelection );
    }
    else {
      SMESH::SetPointRepresentation( false );
      if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow() )
        aViewWindow->SetSelectionMode( CellSelection );
    }
  }

  QString oldID = myID->text().trimmed();
  SMESH_Actor* oldActor = myActor;
  myID->clear();
  
  connect( selMgr, SIGNAL( currentSelectionChanged() ), this, SLOT( updateInfo() ) );
  updateInfo();
  
  if ( oldActor == myActor && myActor && !oldID.isEmpty() ) {
    myID->setText( oldID );
    idChanged();
  }
}

/*!
  \brief Show help page
*/
void SMESHGUI_MeshInfoDlg::help()
{
  SMESH::ShowHelpFile( ( myTabWidget->currentIndex() == BaseInfo || myTabWidget->currentIndex() == AddInfo ) ?
                       "mesh_infos_page.html#advanced_mesh_infos_anchor" : 
                       "mesh_infos_page.html#mesh_element_info_anchor" );
}

/*!
  \brief Show mesh information
*/
void SMESHGUI_MeshInfoDlg::updateInfo()
{
  SUIT_OverrideCursor wc;

  SALOME_ListIO selected;
  SMESHGUI::selectionMgr()->selectedObjects( selected );

  if ( selected.Extent() == 1 ) {
    Handle(SALOME_InteractiveObject) IO = selected.First();
    showInfo( IO );
  }
//   else {
//     myBaseInfo->clear();
//     myElemInfo->clear();
//     myAddInfo->clear();
//   }
}

/*!
  \brief Activate dialog box
*/
void SMESHGUI_MeshInfoDlg::activate()
{
  SMESHGUI::GetSMESHGUI()->EmitSignalDeactivateDialog();
  SMESHGUI::GetSMESHGUI()->SetActiveDialogBox( this );
  myTabWidget->setEnabled( true );
  updateSelection();
}

/*!
  \brief Deactivate dialog box
*/
void SMESHGUI_MeshInfoDlg::deactivate()
{
  myTabWidget->setEnabled( false );
  disconnect( SMESHGUI::selectionMgr(), SIGNAL( currentSelectionChanged() ), this, SLOT( updateInfo() ) );
}

/*!
  \brief Called when users switches between node / element modes.
*/
void SMESHGUI_MeshInfoDlg::modeChanged()
{
  myID->clear();
  updateSelection();
}

/*!
  \brief Caled when users prints mesh element ID in the corresponding field.
*/
void SMESHGUI_MeshInfoDlg::idChanged()
{
  SVTK_Selector* selector = SMESH::GetViewWindow()->GetSelector();
  if ( myActor && selector ) {
    Handle(SALOME_InteractiveObject) IO = myActor->getIO();
    TColStd_MapOfInteger ID;
    QSet<long> ids;
    QStringList idTxt = myID->text().split( " ", QString::SkipEmptyParts );
    foreach ( QString tid, idTxt ) {
      long id = tid.trimmed().toLong();
      const SMDS_MeshElement* e = myMode->checkedId() == ElemMode ? 
        myActor->GetObject()->GetMesh()->FindElement( id ) :
        myActor->GetObject()->GetMesh()->FindNode( id );
      if ( e ) {
        ID.Add( id );
        ids << id;
      }
    }
    selector->AddOrRemoveIndex( IO, ID, false );
    if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow() )
      aViewWindow->highlight( IO, true, true );
    myElemInfo->showInfo( ids, myMode->checkedId() == ElemMode );
  }
}