//  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.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
//
//
//
//  File   : SMESHGUI_MergeNodesDlg.cxx
//  Author : Michael ZORIN
//  Module : SMESH
//  $Header: 

#include "SMESHGUI_MergeNodesDlg.h"

#include "SMESHGUI.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_VTKUtils.h"
#include "SMESHGUI_IdValidator.h"
#include "SMESHGUI_SpinBox.h"
#include "SMESH_Actor.h"
#include "SMDS_Mesh.hxx"

#include "GEOMBase.h"

#include "QAD_Application.h"
#include "QAD_Desktop.h"
#include "QAD_MessageBox.h"
#include "utilities.h"

// QT Includes
#include <qapplication.h>
#include <qbuttongroup.h>
#include <qgroupbox.h>
#include <qlabel.h>
#include <qlineedit.h>
#include <qlistbox.h>
#include <qlistview.h>
#include <qpushbutton.h>
#include <qradiobutton.h>
#include <qcheckbox.h>
#include <qlayout.h>
#include <qpixmap.h>
#include <qheader.h>

using namespace std;

//=================================================================================
// class    : SMESHGUI_MergeNodesDlg()
// purpose  : 
//=================================================================================
SMESHGUI_MergeNodesDlg::SMESHGUI_MergeNodesDlg( QWidget* parent, const char* name, SALOME_Selection* Sel,
					      bool modal, WFlags fl )
  : QDialog( parent, name, modal, WStyle_Customize | WStyle_NormalBorder | WStyle_Title | WStyle_SysMenu |
	     Qt::WDestructiveClose)
{
  QPixmap image0(QAD_Desktop::getResourceManager()->loadPixmap( "SMESH",tr("ICON_SMESH_MERGE_NODES")));
  QPixmap image1(QAD_Desktop::getResourceManager()->loadPixmap( "SMESH",tr("ICON_SELECT")));
  
  if ( !name )
    setName( "SMESHGUI_MergeNodesDlg" );
  resize( 303, 185 ); 
  setCaption( tr( "SMESH_MERGE_NODES" ) );
  setSizeGripEnabled( TRUE );
  SMESHGUI_MergeNodesDlgLayout = new QGridLayout( this ); 
  SMESHGUI_MergeNodesDlgLayout->setSpacing( 6 );
  SMESHGUI_MergeNodesDlgLayout->setMargin( 11 );
  
  /***************************************************************/
  GroupConstructors = new QButtonGroup( this, "GroupConstructors" );
  GroupConstructors->setSizePolicy( QSizePolicy( (QSizePolicy::SizeType)5, (QSizePolicy::SizeType)0, 0, 0, GroupConstructors->sizePolicy().hasHeightForWidth() ) );
  GroupConstructors->setTitle( tr( "SMESH_MERGE_NODES"  ) );
  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 );
  QHBoxLayout* RBLayout = new QHBoxLayout( 0, 0, 6, "Layout2");
  RadioButton1= new QRadioButton( GroupConstructors, "RadioButton1" );
  RadioButton1->setText( tr( ""  ) );
  RadioButton1->setPixmap( image0 );
  RBLayout->addWidget( RadioButton1);
  GroupConstructorsLayout->addLayout( RBLayout, 0, 0 );
  SMESHGUI_MergeNodesDlgLayout->addWidget( GroupConstructors, 0, 0 );
  
  /***************************************************************/
  GroupButtons = new QGroupBox( this, "GroupButtons" );
  GroupButtons->setSizePolicy( QSizePolicy( (QSizePolicy::SizeType)7, (QSizePolicy::SizeType)0, 0, 0, GroupButtons->sizePolicy().hasHeightForWidth() ) );
  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 );
  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_MergeNodesDlgLayout->addWidget( GroupButtons, 4, 0 );

  /***************************************************************/
  
  // Controls for mesh defining
  GroupMesh = new QGroupBox( this, "GroupMesh" );
  GroupMesh->setTitle( tr( "SMESH_MESH" ) );
  GroupMesh->setColumnLayout(0, Qt::Vertical );
  GroupMesh->layout()->setSpacing( 0 );
  GroupMesh->layout()->setMargin( 0 );
  GroupMeshLayout = new QGridLayout( GroupMesh->layout() );
  GroupMeshLayout->setAlignment( Qt::AlignTop );
  GroupMeshLayout->setSpacing( 6 );
  GroupMeshLayout->setMargin( 11 );
  
  TextLabelName = new QLabel( GroupMesh, "TextLabelName" );
  TextLabelName->setText( tr( "SMESH_NAME" ) );
  GroupMeshLayout->addWidget( TextLabelName, 0, 0 );

  SelectMeshButton = new QPushButton( GroupMesh, "SelectMeshButton" );
  SelectMeshButton->setPixmap( image1 );
  GroupMeshLayout->addWidget( SelectMeshButton, 0, 1 );

  LineEditMesh = new QLineEdit(GroupMesh, "LineEditMesh");
  LineEditMesh->setReadOnly(true);
  GroupMeshLayout->addWidget( LineEditMesh, 0, 2 );
  
  SMESHGUI_MergeNodesDlgLayout->addWidget( GroupMesh, 1, 0 );
  
  // Controls for coincident nodes detecting
  GroupCoincident = new QGroupBox( this, "GroupCoincident" );
  GroupCoincident->setTitle( tr( "COINCIDENT_NODES" ) );
  GroupCoincident->setColumnLayout(0, Qt::Vertical );
  GroupCoincident->layout()->setSpacing( 0 );
  GroupCoincident->layout()->setMargin( 0 );
  QGridLayout* GroupCoincidentLayout = new QGridLayout( GroupCoincident->layout() );
  GroupCoincidentLayout->setAlignment( Qt::AlignTop );
  GroupCoincidentLayout->setSpacing( 6 );
  GroupCoincidentLayout->setMargin( 11 );

  TextLabelTolerance = new QLabel( GroupCoincident, "TextLabelTolerance" );
  TextLabelTolerance->setText( tr( "SMESH_TOLERANCE" ) );
  GroupCoincidentLayout->addWidget( TextLabelTolerance, 0, 0 );
  
  SpinBoxTolerance = new SMESHGUI_SpinBox( GroupCoincident, "SpinBoxTolerance" );
  GroupCoincidentLayout->addWidget( SpinBoxTolerance, 0, 1 );
  
  QPushButton* DetectButton = new QPushButton( GroupCoincident, "DetectButton" );
  DetectButton->setText( tr("DETECT") );
  GroupCoincidentLayout->addWidget( DetectButton, 0, 2 );
  
  ListCoincident = new QListView( GroupCoincident );
  ListCoincident->setSorting( -1 );
  ListCoincident->addColumn( "Nodes" );
  ListCoincident->header()->hide();
  
  GroupCoincidentLayout->addMultiCellWidget( ListCoincident, 1, 1, 0, 1 );

  SelectAllCB = new QCheckBox(GroupCoincident, "SelectAllCB");
  SelectAllCB->setText(tr("SELECT_ALL"));
  GroupCoincidentLayout->addWidget( SelectAllCB, 2, 0 );
  
  SMESHGUI_MergeNodesDlgLayout->addWidget( GroupCoincident, 2, 0 );

  // Controls for editing group of nodes
  GroupEdit = new QGroupBox( this, "GroupEdit" );
  GroupEdit->setTitle( tr( "EDIT_GROUP_OF_NODES" ) );
  GroupEdit->setColumnLayout(0, Qt::Vertical );
  GroupEdit->layout()->setSpacing( 0 );
  GroupEdit->layout()->setMargin( 0 );
  QGridLayout* GroupEditLayout = new QGridLayout( GroupEdit->layout() );
  GroupEditLayout->setAlignment( Qt::AlignTop );
  GroupEditLayout->setSpacing( 6 );
  GroupEditLayout->setMargin( 11 );
  
  ListEdit = new QListBox( GroupEdit, "ListEdit" );
  ListEdit->setColumnMode(QListBox::FitToHeight);
  ListEdit->setSelectionMode( QListBox::Extended );
  GroupEditLayout->addMultiCellWidget( ListEdit, 0, 2, 0, 0 );
  
  QPushButton* AddButton = new QPushButton( GroupEdit, "AddButton" );
  AddButton->setText( tr("SMESH_BUT_ADD") );
  GroupEditLayout->addWidget( AddButton, 0, 1 );
  
  QPushButton* RemoveButton = new QPushButton( GroupEdit, "RemoveButton" );
  RemoveButton->setText( tr("SMESH_BUT_REMOVE") );
  GroupEditLayout->addWidget( RemoveButton, 1, 1 );
  
  QSpacerItem* spacer = new QSpacerItem( 20, 200, QSizePolicy::Minimum, QSizePolicy::Expanding );
  GroupEditLayout->addItem( spacer, 2, 1 );
  
  SMESHGUI_MergeNodesDlgLayout->addWidget( GroupEdit, 3, 0 );
  
  /* Initialisations */
  SpinBoxTolerance->RangeStepAndValidator( 0.0, 999999.999, 0.1, 3 );
  SpinBoxTolerance->SetValue(1e-05);
  
  RadioButton1->setChecked( TRUE );
  
  mySelection = Sel;  
  
  mySMESHGUI  = SMESHGUI::GetSMESHGUI() ;
  mySMESHGUI->SetActiveDialogBox( (QDialog*)this ) ;
  
  myMeshOrSubMeshFilter = new SMESH_TypeFilter( MESHorSUBMESH );

  /* 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( SelectMeshButton, SIGNAL (clicked() ), this, SLOT( SetEditCurrentArgument() ) );
  connect( DetectButton, SIGNAL ( clicked() ), this, SLOT( onDetect() ) );
  connect( ListCoincident, SIGNAL ( selectionChanged() ), this, SLOT( onSelectNodesGroup() ) );
  connect( ListCoincident, SIGNAL ( pressed( QListViewItem* ) ), this, SLOT( updateControls() ) );
  connect( ListCoincident, SIGNAL ( currentChanged( QListViewItem* ) ), this, SLOT( updateControls() ) );
  connect( SelectAllCB, SIGNAL( toggled(bool) ), this, SLOT(onSelectAll(bool) ) );
  connect( ListEdit, SIGNAL ( selectionChanged() ), this, SLOT( onSelectNodesFromGroup() ) );
  connect( AddButton, SIGNAL ( clicked() ), this, SLOT( onAdd() ) );
  connect( RemoveButton, SIGNAL ( clicked() ), this, SLOT( onRemove() ) );

  connect( mySMESHGUI, SIGNAL ( SignalDeactivateActiveDialog() ), this, SLOT( DeactivateActiveDialog() ) );
  connect( mySelection, SIGNAL( currentSelectionChanged() ), this, SLOT( SelectionIntoArgument() ) );
  /* to close dialog if study change */
  connect( mySMESHGUI, SIGNAL ( SignalCloseAllDialogs() ), this, SLOT( ClickOnCancel() ) );
  
  /* Move widget on the botton right corner of main widget */
  int x, y ;
  mySMESHGUI->DefineDlgPosition( this, x, y ) ;
  this->move( x, y ) ;
  this->show() ; /* displays Dialog */
  
  resize(0,0);
  buttonOk->setEnabled(false);
  buttonApply->setEnabled(false);
}

//=================================================================================
// function : ~SMESHGUI_MergeNodesDlg()
// purpose  : Destroys the object and frees any allocated resources
//=================================================================================
SMESHGUI_MergeNodesDlg::~SMESHGUI_MergeNodesDlg()
{
  // no need to delete child widgets, Qt does it all for us
}


//=================================================================================
// function : ClickOnApply()
// purpose  :
//=================================================================================
bool SMESHGUI_MergeNodesDlg::ClickOnApply()
{
  if (mySMESHGUI->ActiveStudyLocked() || myMesh->_is_nil())
    return false;

  try
    {
      SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditor();

      QApplication::setOverrideCursor(Qt::waitCursor);
      SMESH::array_of_long_array_var aGroupsOfNodes = new SMESH::array_of_long_array;
      aGroupsOfNodes->length(ListCoincident->childCount());
      QListViewItem* item = ListCoincident->firstChild();

      int anArrayNum = 0;
      while (item)
	{
	  QStringList aListIds = QStringList("");
	  if (((QCheckListItem*) item)->isOn())
	    aListIds = QStringList::split( " ", item->text(0), false);
	  
	  SMESH::long_array_var anIds = new SMESH::long_array;
	  anIds->length(aListIds.count());
	  
	  for ( int i = 0; i < aListIds.count(); i++ )
	    anIds[i] = aListIds[i].toInt();
	  
	  aGroupsOfNodes[anArrayNum++] = anIds.inout();
	  
	  item = item->itemBelow();
	}

      aMeshEditor->MergeNodes (aGroupsOfNodes.inout());
      QApplication::restoreOverrideCursor();
    }
  catch( ... )
    {
    }

  mySelection->ClearIObjects();
  SMESH::UpdateView();

  onDetect();
  return true;
}

//=================================================================================
// function : ClickOnOk()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::ClickOnOk()
{
  if( ClickOnApply())
    ClickOnCancel() ;
}

	
//=================================================================================
// function : ClickOnCancel()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::ClickOnCancel()
{
  mySelection->ClearFilters();
  mySelection->ClearIObjects();
  SMESH::SetPointRepresentation(false);
  QAD_Application::getDesktop()->SetSelectionMode( ActorSelection );
  disconnect( mySelection, 0, this, 0 );
  mySMESHGUI->ResetState() ;
  reject() ;
}


//=================================================================================
// function : onEditNodesGroup()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::onEditNodesGroup()
{
  if ( ListCoincident->childCount() < 1 )
    return;

  QString aNewIds = "";
  
  QListBoxItem* anItem;
  for (anItem = ListEdit->firstItem(); anItem != 0; anItem = anItem->next())
    aNewIds+=QString(" %1").arg(anItem->text());
  
  ListCoincident->currentItem()->setText(0, aNewIds);
}


//=================================================================================
// function : updateControls()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::updateControls()
{
  if ( ListCoincident->childCount() < 1 )
    {
      SMESH::SetPointRepresentation(false);
      QAD_Application::getDesktop()->SetSelectionMode( ActorSelection );
      return;
    }
  
  bool hasChecked = false, hasUnchecked = false;
  
  QListViewItem* item = ListCoincident->firstChild();
  
  while (item && (!hasChecked || !hasUnchecked))
    {
      if (((QCheckListItem*) item)->isOn())
	hasChecked = true;
      else
	hasUnchecked = true;
      
      item = item->itemBelow();
    }
  
  if (hasUnchecked)
    SelectAllCB->setChecked(false);
  
  bool enable = !(myMesh->_is_nil()) && hasChecked;
  
  buttonOk->setEnabled(enable);
  buttonApply->setEnabled(enable);
}


//=================================================================================
// function : onDetect()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onDetect()
{
  if(myMesh->_is_nil())
    return;

  try
    {
      SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditor();
      
      QApplication::setOverrideCursor(Qt::waitCursor);
      ListCoincident->clear();
      ListEdit->clear();
      
      SMESH::array_of_long_array_var aNodeGroups;
      aMeshEditor->FindCoincidentNodes(SpinBoxTolerance->GetValue(), aNodeGroups);
      
      for ( int i = 0; i < aNodeGroups->length(); i++ )
	{
	  SMESH::long_array& aGroup = aNodeGroups[i];
	  
	  QString aNodeIds;
	  for ( int j = 0; j < aGroup.length(); j++ )
	    aNodeIds+=QString(" %1").arg(aGroup[j]);
	  
	  new QCheckListItem ( ListCoincident, aNodeIds, QCheckListItem::CheckBox );
	}
      QApplication::restoreOverrideCursor();
    }
  catch( ... )
    {
    }
  
  updateControls();
}


//=================================================================================
// function : onSelectNodesGroup()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onSelectNodesGroup()
{
  if(!myActor)
    return;
  
  myEditCurrentArgument = (QWidget*)ListCoincident;
  
  QListViewItem* aSelectedItem = ListCoincident->selectedItem();
  if (!aSelectedItem)
    return;
  
  QStringList aListId = QStringList::split( " ", aSelectedItem->text(0), false);
  
  ListEdit->clear();
  ListEdit->insertStringList(aListId);
  
  mySelection->ClearIObjects();
  mySelection->AddIObject( myActor->getIO() );
  
  SMESH::SetPointRepresentation(true);
  QAD_Application::getDesktop()->SetSelectionMode( NodeSelection, true );
    
  ListEdit->selectAll(true);
}


//=================================================================================
// function : onSelectAll()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onSelectAll(bool isToggled)
{
  if (isToggled)
    {
      int aNbItems = 0;
      QListViewItem* item = ListCoincident->firstChild();
      while (item)
	{
	  aNbItems++;
	  if (!((QCheckListItem*) item)->isOn())
	    ((QCheckListItem*) item)->setOn(true);
	  item = item->itemBelow();
	}
      
      if (aNbItems)
	{
	  buttonOk->setEnabled(true);
	  buttonApply->setEnabled(true);
	}
    }
}


//=================================================================================
// function : onSelectNodesFromGroup()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onSelectNodesFromGroup()
{
  if (!myActor) 
    return;
  
  mySelection->ClearIObjects();
  
  TColStd_MapOfInteger aIndexes;
  QListBoxItem* anItem;
  for (anItem = ListEdit->firstItem(); anItem != 0; anItem = anItem->next()) {
    if (anItem->isSelected()) {
      int anId = anItem->text().toInt();
      aIndexes.Add(anId);
    }
  }
  mySelection->AddOrRemoveIndex(myActor->getIO(), aIndexes, false, false);
  mySelection->AddIObject(myActor->getIO());
}


//=================================================================================
// function : onAdd()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onAdd()
{
  if (!myActor)
    return;

  QString aListStr = "";
  int aNbNnodes = 0;
  
  aNbNnodes = SMESH::GetNameOfSelectedNodes(mySelection, myActor->getIO(), aListStr);
  if (aNbNnodes < 1)
    return;
  
  QStringList aNodes = QStringList::split(" ", aListStr);
  QListBoxItem* anItem = 0;
  
  for (QStringList::iterator it = aNodes.begin(); it != aNodes.end(); ++it) {
    anItem = ListEdit->findItem(*it, Qt::ExactMatch);
    if (!anItem) {
      anItem = new QListBoxText(*it);
      ListEdit->insertItem(anItem);
    }
    ListEdit->setSelected(anItem, true);
  }
  
  onEditNodesGroup();
}


//=================================================================================
// function : onRemove()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::onRemove()
{
  if (myEditCurrentArgument != (QWidget*)ListCoincident)
    return;
  
  for (int i = ListEdit->count(); i > 0; i--) 
    {
      if (ListEdit->isSelected(i-1))
	ListEdit->removeItem(i-1);
    }
  onEditNodesGroup();
}


//=================================================================================
// function : SetEditCurrentArgument()
// purpose  : 
//=================================================================================
void SMESHGUI_MergeNodesDlg::SetEditCurrentArgument()
{
  QPushButton* send = (QPushButton*)sender();
  
  disconnect( mySelection, 0, this, 0 );
  mySelection->ClearIObjects();
  mySelection->ClearFilters();
  
  if(send == SelectMeshButton) 
    {
      myEditCurrentArgument = (QWidget*)LineEditMesh;
      SMESH::SetPointRepresentation(false);
      QAD_Application::getDesktop()->SetSelectionMode( ActorSelection );
      mySelection->AddFilter(myMeshOrSubMeshFilter) ;
    }
  
  myEditCurrentArgument->setFocus();
  connect( mySelection, SIGNAL( currentSelectionChanged() ), this, SLOT( SelectionIntoArgument() ) );
  SelectionIntoArgument() ;
}


//=================================================================================
// function : SelectionIntoArgument()
// purpose  : Called when selection as changed or other case
//=================================================================================
void SMESHGUI_MergeNodesDlg::SelectionIntoArgument()
{
  if (myEditCurrentArgument == (QWidget*)LineEditMesh)
    {
      QString aString = "";
      LineEditMesh->setText( aString );
      
      ListCoincident->clear();
      ListEdit->clear();

      int nbSel = SMESH::GetNameOfSelectedIObjects(mySelection, aString);
      if(nbSel != 1)
	return;
      
      Handle(SALOME_InteractiveObject) IO = mySelection->firstIObject();
      myMesh = SMESH::IObjectToInterface<SMESH::SMESH_Mesh>(IO) ;
      myActor = SMESH::FindActorByEntry( mySelection->firstIObject()->getEntry() );
      if(myMesh->_is_nil() || !myActor)
	return;
      
      LineEditMesh->setText( aString );
    }
}


//=================================================================================
// function : DeactivateActiveDialog()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::DeactivateActiveDialog()
{
  if ( GroupConstructors->isEnabled() ) {
    GroupConstructors->setEnabled(false) ;
    GroupMesh->setEnabled(false);
    GroupCoincident->setEnabled(false);
    GroupEdit->setEnabled(false);
    GroupButtons->setEnabled(false) ;
    mySMESHGUI->ResetState() ;    
    mySMESHGUI->SetActiveDialogBox(0) ;
  }
}


//=================================================================================
// function : ActivateThisDialog()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::ActivateThisDialog()
{
  /* Emit a signal to deactivate the active dialog */
  mySMESHGUI->EmitSignalDeactivateDialog() ;   
  GroupConstructors->setEnabled(true) ;
  GroupMesh->setEnabled(true);
  GroupCoincident->setEnabled(true);
  GroupEdit->setEnabled(true);
  GroupButtons->setEnabled(true) ;
  
  mySMESHGUI->SetActiveDialogBox( (QDialog*)this ) ;
  
  SelectionIntoArgument();
}


//=================================================================================
// function : enterEvent()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::enterEvent(QEvent* e)
{
  if ( GroupConstructors->isEnabled() )
    return ;  
  ActivateThisDialog() ;
}


//=================================================================================
// function : closeEvent()
// purpose  :
//=================================================================================
void SMESHGUI_MergeNodesDlg::closeEvent( QCloseEvent* e )
{
  /* same than click on cancel button */
  ClickOnCancel() ;
}


//=======================================================================
//function : hideEvent
//purpose  : caused by ESC key
//=======================================================================

void SMESHGUI_MergeNodesDlg::hideEvent ( QHideEvent * e )
{
  if ( !isMinimized() )
    ClickOnCancel();
}