//  SMESH SMESHGUI : GUI for SMESH 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.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
//
//
//  File   : SMESHGUI_SmoothingDlg.cxx
//  Author : Michael ZORIN
//  Module : SMESH
//  $Header:

#include "SMESHGUI_SmoothingDlg.h"

#include "SMESHGUI.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_VTKUtils.h"
#include "SMESHGUI_MeshUtils.h"
#include "SMESHGUI_SpinBox.h"
#include "SMESHGUI_IdValidator.h"

#include "SMESH_Actor.h"
#include "SMESH_TypeFilter.hxx"
#include "SMESH_NumberFilter.hxx"
#include "SMESH_LogicalFilter.hxx"

#include "SMDS_Mesh.hxx"

#include "SUIT_ResourceMgr.h"
#include "SUIT_OverrideCursor.h"
#include "SUIT_Desktop.h"
#include "SUIT_Session.h"
#include "SUIT_MessageBox.h"

#include "LightApp_Application.h"

#include "SVTK_ViewModel.h"
#include "SVTK_Selector.h"
#include "SVTK_ViewWindow.h"
#include "SVTK_Selection.h"
#include "SALOME_ListIO.hxx"

#include "utilities.h"

// OCCT Includes
#include <TColStd_MapOfInteger.hxx>
#include <TColStd_IndexedMapOfInteger.hxx>

// QT Includes
#include <qapplication.h>
#include <qbuttongroup.h>
#include <qgroupbox.h>
#include <qlabel.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qradiobutton.h>
#include <qcombobox.h>
#include <qcheckbox.h>
#include <qspinbox.h>
#include <qlayout.h>
#include <qvalidator.h>
#include <qpixmap.h>

// IDL Headers
#include "SALOMEconfig.h"
#include CORBA_SERVER_HEADER(SMESH_Group)

using namespace std;

//=================================================================================
// function : SMESHGUI_SmoothingDlg()
// purpose  : constructor
//=================================================================================
SMESHGUI_SmoothingDlg::SMESHGUI_SmoothingDlg( SMESHGUI* theModule, const char* name,
					      bool modal, WFlags fl)
     : QDialog( SMESH::GetDesktop( theModule ), name, modal, WStyle_Customize | WStyle_NormalBorder |
                WStyle_Title | WStyle_SysMenu | Qt::WDestructiveClose),
     mySMESHGUI( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) )
{
  QPixmap image0 (SMESH::GetResourceMgr( mySMESHGUI )->loadPixmap("SMESH", tr("ICON_DLG_SMOOTHING")));
  QPixmap image1 (SMESH::GetResourceMgr( mySMESHGUI )->loadPixmap("SMESH", tr("ICON_SELECT")));

  if (!name)
    setName("SMESHGUI_SmoothingDlg");
  resize(303, 185);
  setCaption(tr("SMESH_SMOOTHING"));
  setSizeGripEnabled(TRUE);
  SMESHGUI_SmoothingDlgLayout = new QGridLayout(this);
  SMESHGUI_SmoothingDlgLayout->setSpacing(6);
  SMESHGUI_SmoothingDlgLayout->setMargin(11);

  /***************************************************************/
  GroupConstructors = new QButtonGroup(this, "GroupConstructors");
  GroupConstructors->setTitle(tr("SMESH_SMOOTHING" ));
  GroupConstructors->setExclusive(TRUE);
  GroupConstructors->setColumnLayout(0, Qt::Vertical);
  GroupConstructors->layout()->setSpacing(0);
  GroupConstructors->layout()->setMargin(0);
  GroupConstructorsLayout = new QGridLayout(GroupConstructors->layout());
  GroupConstructorsLayout->setAlignment(Qt::AlignTop);
  GroupConstructorsLayout->setSpacing(6);
  GroupConstructorsLayout->setMargin(11);
  Constructor1 = new QRadioButton(GroupConstructors, "Constructor1");
  Constructor1->setText(tr("" ));
  Constructor1->setPixmap(image0);
  Constructor1->setChecked(TRUE);
  Constructor1->setSizePolicy(QSizePolicy((QSizePolicy::SizeType)1,
                                          (QSizePolicy::SizeType)0,
                                          Constructor1->sizePolicy().hasHeightForWidth()));
  Constructor1->setMinimumSize(QSize(50, 0));
  GroupConstructorsLayout->addWidget(Constructor1, 0, 0);
  QSpacerItem* spacer = new QSpacerItem(20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
  GroupConstructorsLayout->addItem(spacer, 0, 1);
  SMESHGUI_SmoothingDlgLayout->addWidget(GroupConstructors, 0, 0);

  /***************************************************************/
  GroupButtons = new QGroupBox(this, "GroupButtons");
  GroupButtons->setGeometry(QRect(10, 10, 281, 48));
  GroupButtons->setTitle(tr(""));
  GroupButtons->setColumnLayout(0, Qt::Vertical);
  GroupButtons->layout()->setSpacing(0);
  GroupButtons->layout()->setMargin(0);
  GroupButtonsLayout = new QGridLayout(GroupButtons->layout());
  GroupButtonsLayout->setAlignment(Qt::AlignTop);
  GroupButtonsLayout->setSpacing(6);
  GroupButtonsLayout->setMargin(11);
  buttonHelp = new QPushButton(GroupButtons, "buttonHelp");
  buttonHelp->setText(tr("SMESH_BUT_HELP" ));
  buttonHelp->setAutoDefault(TRUE);
  GroupButtonsLayout->addWidget(buttonHelp, 0, 4);
  buttonCancel = new QPushButton(GroupButtons, "buttonCancel");
  buttonCancel->setText(tr("SMESH_BUT_CLOSE" ));
  buttonCancel->setAutoDefault(TRUE);
  GroupButtonsLayout->addWidget(buttonCancel, 0, 3);
  buttonApply = new QPushButton(GroupButtons, "buttonApply");
  buttonApply->setText(tr("SMESH_BUT_APPLY" ));
  buttonApply->setAutoDefault(TRUE);
  GroupButtonsLayout->addWidget(buttonApply, 0, 1);
  QSpacerItem* spacer_9 = new QSpacerItem(20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
  GroupButtonsLayout->addItem(spacer_9, 0, 2);
  buttonOk = new QPushButton(GroupButtons, "buttonOk");
  buttonOk->setText(tr("SMESH_BUT_OK" ));
  buttonOk->setAutoDefault(TRUE);
  buttonOk->setDefault(TRUE);
  GroupButtonsLayout->addWidget(buttonOk, 0, 0);
  SMESHGUI_SmoothingDlgLayout->addWidget(GroupButtons, 2, 0);

  /***************************************************************/
  GroupArguments = new QGroupBox(this, "GroupArguments");
  GroupArguments->setTitle(tr("SMESH_ARGUMENTS"));
  GroupArguments->setColumnLayout(0, Qt::Vertical);
  GroupArguments->layout()->setSpacing(0);
  GroupArguments->layout()->setMargin(0);
  GroupArgumentsLayout = new QGridLayout(GroupArguments->layout());
  GroupArgumentsLayout->setAlignment(Qt::AlignTop);
  GroupArgumentsLayout->setSpacing(6);
  GroupArgumentsLayout->setMargin(11);

  // Controls for elements selection
  TextLabelElements  = new QLabel(GroupArguments, "TextLabelElements");
  TextLabelElements->setText(tr("SMESH_ID_ELEMENTS" ));
  GroupArgumentsLayout->addWidget(TextLabelElements, 0, 0);

  SelectElementsButton  = new QPushButton(GroupArguments, "SelectElementsButton");
  SelectElementsButton->setText(tr("" ));
  SelectElementsButton->setPixmap(image1);
  SelectElementsButton->setToggleButton(FALSE);
  GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);

  LineEditElements  = new QLineEdit(GroupArguments, "LineEditElements");
  LineEditElements->setValidator(new SMESHGUI_IdValidator(this, "validator"));
  GroupArgumentsLayout->addWidget(LineEditElements, 0, 2);

  // Control for the whole mesh selection
  CheckBoxMesh = new QCheckBox(GroupArguments, "CheckBoxMesh");
  CheckBoxMesh->setText(tr("SMESH_SELECT_WHOLE_MESH"));
  GroupArgumentsLayout->addMultiCellWidget(CheckBoxMesh, 1, 1, 0, 2);

  // Controls for nodes selection
  TextLabelNodes = new QLabel(GroupArguments, "TextLabelNodes");
  TextLabelNodes->setText(tr("FIXED_NODES_IDS"));
  GroupArgumentsLayout->addWidget(TextLabelNodes, 2, 0);

  SelectNodesButton  = new QPushButton(GroupArguments, "SelectNodesButton");
  SelectNodesButton->setText(tr("" ));
  SelectNodesButton->setPixmap(image1);
  SelectNodesButton->setToggleButton(FALSE);
  GroupArgumentsLayout->addWidget(SelectNodesButton, 2, 1);

  LineEditNodes  = new QLineEdit(GroupArguments, "LineEditNodes");
  LineEditNodes->setValidator(new SMESHGUI_IdValidator(this, "validator"));
  GroupArgumentsLayout->addWidget(LineEditNodes, 2, 2);

  // Controls for method selection
  TextLabelMethod = new QLabel(GroupArguments, "TextLabelMethod");
  TextLabelMethod->setText(tr("METHOD" ));
  GroupArgumentsLayout->addMultiCellWidget(TextLabelMethod, 3, 3, 0, 1);

  ComboBoxMethod = new QComboBox(GroupArguments, "ComboBoxMethod");
  GroupArgumentsLayout->addWidget(ComboBoxMethod, 3, 2);

  // Controls for iteration limit defining
  TextLabelLimit = new QLabel(GroupArguments, "TextLabelLimit");
  TextLabelLimit->setText(tr("ITERATION_LIMIT" ));
  GroupArgumentsLayout->addMultiCellWidget(TextLabelLimit, 4, 4, 0, 1);

  SpinBox_IterationLimit = new QSpinBox(GroupArguments, "SpinBox_IterationLimit");
  GroupArgumentsLayout->addWidget(SpinBox_IterationLimit, 4, 2);

  // Controls for max. aspect ratio defining
  TextLabelAspectRatio = new QLabel(GroupArguments, "TextLabelAspectRatio");
  TextLabelAspectRatio->setText(tr("MAX_ASPECT_RATIO"));
  GroupArgumentsLayout->addMultiCellWidget(TextLabelAspectRatio, 5, 5, 0, 1);

  SpinBox_AspectRatio = new SMESHGUI_SpinBox(GroupArguments, "SpinBox_AspectRatio");
  GroupArgumentsLayout->addWidget(SpinBox_AspectRatio, 5, 2);

  // Check box "Is Parametric"
  CheckBoxParametric = new QCheckBox( GroupArguments, "CheckBoxParametric" );
  CheckBoxParametric->setText( tr( "IS_PARAMETRIC" ) );
  GroupArgumentsLayout->addMultiCellWidget( CheckBoxParametric, 6, 6, 0, 2 );


  SMESHGUI_SmoothingDlgLayout->addWidget(GroupArguments, 1, 0);

  /* Initialisations */
  ComboBoxMethod->insertItem(tr("LAPLACIAN"));
  ComboBoxMethod->insertItem(tr("CENTROIDAL"));

  ComboBoxMethod->setCurrentItem(0);

  CheckBoxParametric->setChecked( TRUE );
  
  QIntValidator* anIntValidator = new QIntValidator(SpinBox_IterationLimit);
  SpinBox_IterationLimit->setValidator(anIntValidator);
  SpinBox_IterationLimit->setRange(1, 999999);
  SpinBox_IterationLimit->setValue(20);
  SpinBox_AspectRatio->RangeStepAndValidator(0.0, +999999.999, 0.1, 3);
  SpinBox_AspectRatio->SetValue(1.1);

  GroupArguments->show();
  myConstructorId = 0;
  Constructor1->setChecked(TRUE);
  
  mySelector = (SMESH::GetViewWindow( mySMESHGUI ))->GetSelector();

  mySMESHGUI->SetActiveDialogBox(this);

  // Costruction of the logical filter for the elements: mesh/sub-mesh/group
  SMESH_TypeFilter* aMeshOrSubMeshFilter = new SMESH_TypeFilter (MESHorSUBMESH);
  SMESH_TypeFilter* aSmeshGroupFilter    = new SMESH_TypeFilter (GROUP);

  QPtrList<SUIT_SelectionFilter> aListOfFilters;
  if (aMeshOrSubMeshFilter) aListOfFilters.append(aMeshOrSubMeshFilter);
  if (aSmeshGroupFilter)    aListOfFilters.append(aSmeshGroupFilter);

  myMeshOrSubMeshOrGroupFilter =
    new SMESH_LogicalFilter (aListOfFilters, SMESH_LogicalFilter::LO_OR);

  myHelpFileName = "/files/smoothing.htm";

  Init();

  /***************************************************************/
  // signals and slots connections
  connect(buttonOk, SIGNAL(clicked()),     this, SLOT(ClickOnOk()));
  connect(buttonCancel, SIGNAL(clicked()), this, SLOT(ClickOnCancel()));
  connect(buttonApply, SIGNAL(clicked()),  this, SLOT(ClickOnApply()));
  connect(buttonHelp, SIGNAL(clicked()), this, SLOT(ClickOnHelp()));
  connect(GroupConstructors, SIGNAL(clicked(int)), SLOT(ConstructorsClicked(int)));

  connect(SelectElementsButton, SIGNAL (clicked()), this, SLOT(SetEditCurrentArgument()));
  connect(SelectNodesButton, SIGNAL (clicked()), this, SLOT(SetEditCurrentArgument()));
  connect(mySMESHGUI, SIGNAL (SignalDeactivateActiveDialog()), this, SLOT(DeactivateActiveDialog()));
  connect(mySelectionMgr, SIGNAL(currentSelectionChanged()), this, SLOT(SelectionIntoArgument()));
  /* to close dialog if study change */
  connect(mySMESHGUI, SIGNAL (SignalCloseAllDialogs()), this, SLOT(ClickOnCancel()));
  connect(LineEditElements, SIGNAL(textChanged(const QString&)),
           SLOT(onTextChange(const QString&)));
  connect(LineEditNodes, SIGNAL(textChanged(const QString&)),
           SLOT(onTextChange(const QString&)));
  connect(CheckBoxMesh, SIGNAL(toggled(bool)),
           SLOT(onSelectMesh(bool)));

  /***************************************************************/
  
  this->show(); // displays Dialog
}

//=================================================================================
// function : ~SMESHGUI_SmoothingDlg()
// purpose  : destructor
//=================================================================================
SMESHGUI_SmoothingDlg::~SMESHGUI_SmoothingDlg()
{
  // no need to delete child widgets, Qt does it all for us
}

//=================================================================================
// function : Init()
// purpose  : initialization
//=================================================================================
void SMESHGUI_SmoothingDlg::Init()
{
  myBusy = false;

//   ComboBoxMethod->setCurrentItem(0);

//   SpinBox_IterationLimit->setValue(20);
//   SpinBox_AspectRatio->SetValue(1.1);

  myEditCurrentArgument = LineEditElements;
  LineEditElements->setFocus();
  LineEditElements->clear();
  LineEditNodes->clear();
  myElementsId = "";
  myNbOkElements = 0;
  myNbOkNodes = 0;
  myActor     = 0;
  myMesh = SMESH::SMESH_Mesh::_nil();

  CheckBoxMesh->setChecked(false);
  onSelectMesh(false);
}

//=================================================================================
// function : ConstructorsClicked()
// purpose  : Radio button management
//=================================================================================
void SMESHGUI_SmoothingDlg::ConstructorsClicked (int constructorId)
{
}

//=================================================================================
// function : ClickOnApply()
// purpose  : Called when user presses <Apply> button
//=================================================================================
void SMESHGUI_SmoothingDlg::ClickOnApply()
{
  if (mySMESHGUI->isActiveStudyLocked())
    return;

  if (myNbOkElements &&
      (myNbOkNodes || LineEditNodes->text().stripWhiteSpace().isEmpty())) {
    QStringList aListElementsId = QStringList::split(" ", myElementsId, false);
    QStringList aListNodesId    = QStringList::split(" ", LineEditNodes->text(), false);

    SMESH::long_array_var anElementsId = new SMESH::long_array;
    SMESH::long_array_var aNodesId = new SMESH::long_array;

    anElementsId->length(aListElementsId.count());
    for (int i = 0; i < aListElementsId.count(); i++)
      anElementsId[i] = aListElementsId[i].toInt();

    if (myNbOkNodes) {
      aNodesId->length(aListNodesId.count());
      for (int i = 0; i < aListNodesId.count(); i++)
        aNodesId[i] = aListNodesId[i].toInt();
    } else {
      aNodesId->length(0);
    }

    long anIterationLimit = (long)SpinBox_IterationLimit->value();
    double aMaxAspectRatio = SpinBox_AspectRatio->GetValue();

    SMESH::SMESH_MeshEditor::Smooth_Method aMethod = SMESH::SMESH_MeshEditor::LAPLACIAN_SMOOTH;
    if (ComboBoxMethod->currentItem() > 0)
      aMethod =  SMESH::SMESH_MeshEditor::CENTROIDAL_SMOOTH;

    bool aResult = false;
    try {
      SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditor();
      QApplication::setOverrideCursor(Qt::waitCursor);
      if ( CheckBoxParametric->isChecked() )
	aResult = aMeshEditor->SmoothParametric(anElementsId.inout(), aNodesId.inout(),
						anIterationLimit, aMaxAspectRatio, aMethod);
      else
	aResult = aMeshEditor->Smooth(anElementsId.inout(), aNodesId.inout(),
				      anIterationLimit, aMaxAspectRatio, aMethod);
      QApplication::restoreOverrideCursor();
    } catch (...) {
    }

    if (aResult) {
      Handle(SALOME_InteractiveObject) anIO = myActor->getIO();

      SALOME_ListIO aList;
      aList.Append(anIO);
      mySelectionMgr->setSelectedObjects(aList, false);
      SMESH::UpdateView();
      Init();
    }
  }
}

//=================================================================================
// function : ClickOnOk()
// purpose  : Called when user presses <OK> button
//=================================================================================
void SMESHGUI_SmoothingDlg::ClickOnOk()
{
  ClickOnApply();
  ClickOnCancel();
}

//=================================================================================
// function : ClickOnCancel()
// purpose  : Called when dialog box is closed
//=================================================================================
void SMESHGUI_SmoothingDlg::ClickOnCancel()
{
  disconnect(mySelectionMgr, 0, this, 0);
  mySelectionMgr->clearFilters();
  //mySelectionMgr->clearSelected();
  SMESH::SetPickable(); // ???
  SMESH::SetPointRepresentation(false);
  if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
    aViewWindow->SetSelectionMode(ActorSelection);
  mySMESHGUI->ResetState();
  reject();
}

//=================================================================================
// function : ClickOnHelp()
// purpose  :
//=================================================================================
void SMESHGUI_SmoothingDlg::ClickOnHelp()
{
  LightApp_Application* app = (LightApp_Application*)(SUIT_Session::session()->activeApplication());
  if (app) 
    app->onHelpContextModule(mySMESHGUI ? app->moduleName(mySMESHGUI->moduleName()) : QString(""), myHelpFileName);
  else {
    SUIT_MessageBox::warn1(0, QObject::tr("WRN_WARNING"),
			   QObject::tr("EXTERNAL_BROWSER_CANNOT_SHOW_PAGE").
			   arg(app->resourceMgr()->stringValue("ExternalBrowser", "application")).arg(myHelpFileName),
			   QObject::tr("BUT_OK"));
  }
}

//=======================================================================
// function : onTextChange()
// purpose  :
//=======================================================================
void SMESHGUI_SmoothingDlg::onTextChange (const QString& theNewText)
{
  QLineEdit* send = (QLineEdit*)sender();

  // return if busy
  if (myBusy) return;

  // set busy flag
  myBusy = true;

  if (send == LineEditElements)
    myNbOkElements = 0;
  else if (send == LineEditNodes)
    myNbOkNodes = 0;

  buttonOk->setEnabled(false);
  buttonApply->setEnabled(false);

  // hilight entered elements/nodes
  SMDS_Mesh* aMesh = 0;
  if (myActor)
    aMesh = myActor->GetObject()->GetMesh();

  if (aMesh) {
    
    QStringList aListId = QStringList::split(" ", theNewText, false);

    if (send == LineEditElements) {
      const Handle(SALOME_InteractiveObject)& anIO = myActor->getIO();
      TColStd_MapOfInteger newIndices;
      for (int i = 0; i < aListId.count(); i++) {
	const SMDS_MeshElement * e = aMesh->FindElement(aListId[ i ].toInt());
	if (e)
	  newIndices.Add(e->GetID());
	myNbOkElements++;
      }
      mySelector->AddOrRemoveIndex(anIO, newIndices, false);
      if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
	aViewWindow->highlight( anIO, true, true );
      myElementsId = theNewText;

    } else if (send == LineEditNodes) {
      TColStd_MapOfInteger newIndices;
      
      for (int i = 0; i < aListId.count(); i++) {
	const SMDS_MeshNode * n = aMesh->FindNode(aListId[ i ].toInt());
	if (n)
	  newIndices.Add(n->GetID());
	myNbOkNodes++;
      }
      mySelector->AddOrRemoveIndex(myActor->getIO(), newIndices, false);
      if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
	aViewWindow->highlight( myActor->getIO(), true, true );
    }
  }

  if (myNbOkElements && (myNbOkNodes || LineEditNodes->text().stripWhiteSpace().isEmpty())) {
    buttonOk->setEnabled(true);
    buttonApply->setEnabled(true);
  }

  myBusy = false;
}

//=================================================================================
// function : SelectionIntoArgument()
// purpose  : Called when selection as changed or other case
//=================================================================================
void SMESHGUI_SmoothingDlg::SelectionIntoArgument()
{
  if (myBusy) return;

  // clear
  myActor = 0;
  QString aString = "";

  myBusy = true;
  if (myEditCurrentArgument == (QWidget*)LineEditElements) {
    LineEditElements->setText(aString);
    myNbOkElements = 0;
    buttonOk->setEnabled(false);
    buttonApply->setEnabled(false);
  }
  myBusy = false;

  if (!GroupButtons->isEnabled()) // inactive
    return;

  // get selected mesh
  SALOME_ListIO aList;
  mySelectionMgr->selectedObjects(aList,SVTK_Viewer::Type());
  int nbSel = aList.Extent();
  if (nbSel != 1)
    return;

  Handle(SALOME_InteractiveObject) IO = aList.First();
  myMesh = SMESH::GetMeshByIO(IO);
  if (myMesh->_is_nil())
    return;

  myActor = SMESH::FindActorByObject(myMesh);
  if (!myActor)
    return;

  int aNbUnits = 0;

  if (myEditCurrentArgument == LineEditElements) {
    myElementsId = "";

    if (CheckBoxMesh->isChecked()) {
      SMESH::GetNameOfSelectedIObjects(mySelectionMgr, aString);

      if (!SMESH::IObjectToInterface<SMESH::SMESH_Mesh>(IO)->_is_nil()) { //MESH
        // get IDs from mesh
        SMDS_Mesh* aSMDSMesh = myActor->GetObject()->GetMesh();
        if (!aSMDSMesh)
          return;

        for (int i = aSMDSMesh->MinElementID(); i <= aSMDSMesh->MaxElementID(); i++ ) {
          const SMDS_MeshElement * e = aSMDSMesh->FindElement(i);
          if (e) {
            myElementsId += QString(" %1").arg(i);
            aNbUnits++;
          }
        }
      } else if (!SMESH::IObjectToInterface<SMESH::SMESH_subMesh>(IO)->_is_nil()) { //SUBMESH
        // get submesh
        SMESH::SMESH_subMesh_var aSubMesh = SMESH::IObjectToInterface<SMESH::SMESH_subMesh>(IO);

        // get IDs from submesh
        SMESH::long_array_var anElementsIds = new SMESH::long_array;
        anElementsIds = aSubMesh->GetElementsId();
        for (int i = 0; i < anElementsIds->length(); i++) {
          myElementsId += QString(" %1").arg(anElementsIds[i]);
        }
        aNbUnits = anElementsIds->length();
      } else { // GROUP
        // get smesh group
        SMESH::SMESH_GroupBase_var aGroup =
          SMESH::IObjectToInterface<SMESH::SMESH_GroupBase>(IO);
        if (aGroup->_is_nil())
          return;

        // get IDs from smesh group
        SMESH::long_array_var anElementsIds = new SMESH::long_array;
        anElementsIds = aGroup->GetListOfID();
        for (int i = 0; i < anElementsIds->length(); i++) {
          myElementsId += QString(" %1").arg(anElementsIds[i]);
        }
        aNbUnits = anElementsIds->length();
      }
    } else {
      aNbUnits = SMESH::GetNameOfSelectedElements(mySelector, myActor->getIO(), aString);
      myElementsId = aString;
    }
  } else if (myEditCurrentArgument == LineEditNodes && !myMesh->_is_nil() && myActor) {
    myNbOkNodes = 0;
    aNbUnits = SMESH::GetNameOfSelectedNodes(mySelector, myActor->getIO(), aString);
  } else {
  }

  if (aNbUnits < 1)
    return;

  myBusy = true;
  myEditCurrentArgument->setText(aString);
  myBusy = false;

  // OK
  if (myEditCurrentArgument == LineEditElements)
    myNbOkElements = true;
  else if (myEditCurrentArgument == LineEditNodes)
    myNbOkNodes = true;

  if (myNbOkElements) {
    buttonOk->setEnabled(true);
    buttonApply->setEnabled(true);
  }
}

//=================================================================================
// function : SetEditCurrentArgument()
// purpose  :
//=================================================================================
void SMESHGUI_SmoothingDlg::SetEditCurrentArgument()
{
  QPushButton* send = (QPushButton*)sender();

  switch (myConstructorId) {
  case 0: /* default constructor */
    {
      disconnect(mySelectionMgr, 0, this, 0);
      mySelectionMgr->clearSelected();
      mySelectionMgr->clearFilters();

      if (send == SelectElementsButton) {
        myEditCurrentArgument = LineEditElements;
        SMESH::SetPointRepresentation(false);
        if (CheckBoxMesh->isChecked()) {
          mySelectionMgr->setSelectionModes(ActorSelection);
          mySelectionMgr->installFilter(myMeshOrSubMeshOrGroupFilter);
        } else {
	  if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
	    aViewWindow->SetSelectionMode(CellSelection);
	}
      }	else if (send == SelectNodesButton) {
        myEditCurrentArgument = LineEditNodes;
        SMESH::SetPointRepresentation(true);
	if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
	  aViewWindow->SetSelectionMode(NodeSelection);
      }

      myEditCurrentArgument->setFocus();
      connect(mySelectionMgr, SIGNAL(currentSelectionChanged()), this, SLOT(SelectionIntoArgument()));
      SelectionIntoArgument();
      break;
    }
  }
}

//=================================================================================
// function : DeactivateActiveDialog()
// purpose  : Deactivates this dialog
//=================================================================================
void SMESHGUI_SmoothingDlg::DeactivateActiveDialog()
{
  if (GroupConstructors->isEnabled()) {
    GroupConstructors->setEnabled(false);
    GroupArguments->setEnabled(false);
    GroupButtons->setEnabled(false);
    mySMESHGUI->ResetState();
    mySMESHGUI->SetActiveDialogBox(0);
  }
}

//=================================================================================
// function : ActivateThisDialog()
// purpose  : Activates this dialog
//=================================================================================
void SMESHGUI_SmoothingDlg::ActivateThisDialog()
{
  // Emit a signal to deactivate the active dialog
  mySMESHGUI->EmitSignalDeactivateDialog();
  GroupConstructors->setEnabled(true);
  GroupArguments->setEnabled(true);
  GroupButtons->setEnabled(true);

  mySMESHGUI->SetActiveDialogBox(this);
  if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
    aViewWindow->SetSelectionMode(CellSelection);
  SelectionIntoArgument();
}

//=================================================================================
// function : enterEvent()
// purpose  : Mouse enter event
//=================================================================================
void SMESHGUI_SmoothingDlg::enterEvent (QEvent*)
{
  if (!GroupConstructors->isEnabled())
    ActivateThisDialog();
}

//=================================================================================
// function : closeEvent()
// purpose  :
//=================================================================================
void SMESHGUI_SmoothingDlg::closeEvent (QCloseEvent*)
{
  /* same than click on cancel button */
  this->ClickOnCancel();
}

//=======================================================================
// function : hideEvent()
// purpose  : caused by ESC key
//=======================================================================
void SMESHGUI_SmoothingDlg::hideEvent (QHideEvent*)
{
  if (!isMinimized())
    ClickOnCancel();
}

//=======================================================================
// function : onSelectMesh()
// purpose  :
//=======================================================================
void SMESHGUI_SmoothingDlg::onSelectMesh (bool toSelectMesh)
{
  if (toSelectMesh)
    TextLabelElements->setText(tr("SMESH_NAME"));
  else
    TextLabelElements->setText(tr("SMESH_ID_ELEMENTS"));

  if (myEditCurrentArgument != LineEditElements) {
    LineEditElements->clear();
    return;
  }

  mySelectionMgr->clearFilters();
  SMESH::SetPointRepresentation(false);

  if (toSelectMesh) {
    mySelectionMgr->setSelectionModes(ActorSelection);
    mySelectionMgr->installFilter(myMeshOrSubMeshOrGroupFilter);
    LineEditElements->setReadOnly(true);
  } else {
    if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
      aViewWindow->SetSelectionMode(CellSelection);
    LineEditElements->setReadOnly(false);
    onTextChange(LineEditElements->text());
  }

  SelectionIntoArgument();
}