From: rnv <rnv@opencascade.com>
Date: Fri, 11 Mar 2011 08:34:40 +0000 (+0000)
Subject: Start implementation of the "21177: EDF 1563 SMESH: Preview of mesh during a modifica... 
X-Git-Tag: StartingPortingMED3~28
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=512a8923018c8a53648b6bc2dd02a29cd8e94eed;p=modules%2Fsmesh.git

Start implementation of the "21177: EDF 1563 SMESH: Preview of mesh during a modification" issue.
---

diff --git a/src/SMESHGUI/Makefile.am b/src/SMESHGUI/Makefile.am
index a7104237c..e1dca0250 100644
--- a/src/SMESHGUI/Makefile.am
+++ b/src/SMESHGUI/Makefile.am
@@ -95,6 +95,7 @@ salomeinclude_HEADERS = \
 	SMESHGUI_MeshOrderOp.h \
 	SMESHGUI_FileValidator.h \
 	SMESHGUI_CopyMeshDlg.h \
+	SMESHGUI_PreviewDlg.h \
 	SMESH_SMESHGUI.hxx
 
 # Libraries targets
@@ -169,7 +170,8 @@ dist_libSMESH_la_SOURCES = \
 	SMESHGUI_MeshOrderDlg.cxx \
 	SMESHGUI_MeshOrderOp.cxx \
 	SMESHGUI_CopyMeshDlg.cxx \
-	SMESHGUI_FileValidator.cxx
+	SMESHGUI_FileValidator.cxx \
+	SMESHGUI_PreviewDlg.cxx
 
 MOC_FILES = \
 	SMESHGUI_moc.cxx \
@@ -227,7 +229,8 @@ MOC_FILES = \
 	SMESHGUI_FindElemByPointDlg_moc.cxx \
 	SMESHGUI_MeshOrderDlg_moc.cxx \
 	SMESHGUI_CopyMeshDlg_moc.cxx \
-	SMESHGUI_MeshOrderOp_moc.cxx
+	SMESHGUI_MeshOrderOp_moc.cxx \
+	SMESHGUI_PreviewDlg_moc.cxx
 
 nodist_libSMESH_la_SOURCES= \
 	$(MOC_FILES)
diff --git a/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.cxx b/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.cxx
index 7b9997de3..eb9a7aa37 100644
--- a/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.cxx
@@ -34,6 +34,7 @@
 #include "SMESHGUI_SpinBox.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -109,8 +110,7 @@ private:
 // purpose  : constructor
 //=================================================================================
 SMESHGUI_ExtrusionAlongPathDlg::SMESHGUI_ExtrusionAlongPathDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+  : SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myFilterDlg( 0 )
 {
@@ -262,6 +262,9 @@ SMESHGUI_ExtrusionAlongPathDlg::SMESHGUI_ExtrusionAlongPathDlg( SMESHGUI* theMod
   MakeGroupsCheck = new QCheckBox(tr("SMESH_MAKE_GROUPS"), GroupArguments);
   MakeGroupsCheck->setChecked(true);
 
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   // layouting
   GroupArgumentsLayout->addWidget(ElementsLab,          0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
@@ -271,7 +274,8 @@ SMESHGUI_ExtrusionAlongPathDlg::SMESHGUI_ExtrusionAlongPathDlg( SMESHGUI* theMod
   GroupArgumentsLayout->addWidget(PathGrp,              2, 0, 1, 4);
   GroupArgumentsLayout->addWidget(BasePointGrp,         3, 0, 1, 4);
   GroupArgumentsLayout->addWidget(AnglesGrp,            4, 0, 1, 4);
-  GroupArgumentsLayout->addWidget(MakeGroupsCheck,      5, 0, 1, 4);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    5, 0, 1, 4);
+  GroupArgumentsLayout->addWidget(MakeGroupsCheck,      6, 0, 1, 4);
 
   /***************************************************************/
   // common buttons group box
@@ -362,6 +366,17 @@ SMESHGUI_ExtrusionAlongPathDlg::SMESHGUI_ExtrusionAlongPathDlg( SMESHGUI* theMod
 
   connect(MeshCheck,      SIGNAL(toggled(bool)), SLOT(onSelectMesh()));
 
+  connect(XSpin,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(YSpin,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(ZSpin,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(AddAngleButton,  SIGNAL(clicked()), this, SLOT(toDisplaySimulation()));
+  connect(RemoveAngleButton, SIGNAL(clicked()), this, SLOT(toDisplaySimulation()));
+  connect(LinearAnglesCheck, SIGNAL(toggled(bool)), SLOT(onSelectMesh()));
+
+
+  //To Connect preview check box
+  connectPreviewControl();
+
   AnglesList->installEventFilter(this);
   ElementsLineEdit->installEventFilter(this);
   StartPointLineEdit->installEventFilter(this);
@@ -410,6 +425,8 @@ void SMESHGUI_ExtrusionAlongPathDlg::Init (bool ResetControls)
     MeshCheck->setChecked(false);
     ConstructorsClicked(0);
     onSelectMesh();
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
   }
   SetEditCurrentArgument(0);
 }
@@ -424,6 +441,8 @@ void SMESHGUI_ExtrusionAlongPathDlg::ConstructorsClicked (int type)
 
   disconnect(mySelectionMgr, 0, this, 0);
 
+  hidePreview();
+
   if (type == 0)
     GroupArguments->setTitle(tr("EXTRUSION_1D"));
   else if (type == 1)
@@ -480,46 +499,12 @@ bool SMESHGUI_ExtrusionAlongPathDlg::ClickOnApply()
   if (!isValid())
     return false;
 
-  SMESH::long_array_var anElementsId = new SMESH::long_array;
-
-  if (!MeshCheck->isChecked()) {
-    // If "Select whole mesh, submesh or group" check box is off ->
-    // use only elements of given type selected by user
-
-    SMDS_Mesh* aMesh;
-    if ( myMeshActor )
-      aMesh = myMeshActor->GetObject()->GetMesh();
-
-    if (aMesh) {
-      QStringList aListElementsId = ElementsLineEdit->text().split(" ", QString::SkipEmptyParts);
-      anElementsId = new SMESH::long_array;
-      anElementsId->length(aListElementsId.count());
-      bool bOk;
-      int j = 0;
-      for (int i = 0; i < aListElementsId.count(); i++) {
-        long ind = aListElementsId[ i ].toLong(&bOk);
-        if  (bOk) {
-          const SMDS_MeshElement* e = aMesh->FindElement(ind);
-          if (e) {
-            bool typeMatch = Elements1dRB->isChecked() && e->GetType() == SMDSAbs_Edge ||
-                             Elements2dRB->isChecked() && e->GetType() == SMDSAbs_Face;
-            if (typeMatch)
-              anElementsId[ j++ ] = ind;
-          }
-        }
-      }
-      anElementsId->length(j);
-    }
-
-    if (anElementsId->length() <= 0) {
-      return false;
-    }
-  }
+  SMESH::long_array_var anElementsId = getSelectedElements();
 
   if (StartPointLineEdit->text().trimmed().isEmpty()) {
     return false;
   }
-
+  
   bool bOk;
   long aNodeStart = StartPointLineEdit->text().toLong(&bOk);
   if (!bOk) {
@@ -527,19 +512,13 @@ bool SMESHGUI_ExtrusionAlongPathDlg::ClickOnApply()
   }
 
   QStringList aParameters;
+  
+  //get angles
+  SMESH::double_array_var anAngles = getAngles();
+  
+  for (int i = 0; i < myAnglesList.count(); i++) 
+    aParameters << AnglesList->item(i)->text();
 
-  // get angles
-  SMESH::double_array_var anAngles = new SMESH::double_array;
-  if (AnglesGrp->isChecked()) {
-    anAngles->length(myAnglesList.count());
-    int j = 0;
-    for (int i = 0; i < myAnglesList.count(); i++) {
-      double angle = myAnglesList[i];
-      anAngles[ j++ ] = angle*PI/180;
-      aParameters << AnglesList->item(i)->text();
-    }
-    anAngles->length(j);
-  }
 
   // get base point
   SMESH::PointStruct aBasePoint;
@@ -973,6 +952,7 @@ void SMESHGUI_ExtrusionAlongPathDlg::SelectionIntoArgument()
     YSpin->SetValue(n->Y());
     ZSpin->SetValue(n->Z());
   }
+  onDisplaySimulation(true);
 }
 
 //=================================================================================
@@ -1286,3 +1266,155 @@ void SMESHGUI_ExtrusionAlongPathDlg::updateLinearAngles()
     LinearAnglesCheck->setChecked( false );
   LinearAnglesCheck->setEnabled( enableLinear );
 }
+
+//=================================================================================
+// function : isValuesValid()
+// purpose  : Return true in case if values entered into dialog are valid
+//=================================================================================
+bool SMESHGUI_ExtrusionAlongPathDlg::isValuesValid() {
+  
+  if ( MeshCheck->isChecked() && myIDSource->_is_nil() ||
+       myMesh->_is_nil() ||
+       myPath->_is_nil() )
+    return false;
+  
+  if(!MeshCheck->isChecked()) {
+    QStringList aListElementsId = ElementsLineEdit->text().split(" ", QString::SkipEmptyParts);
+    if(aListElementsId.count() <= 0)
+      return false;
+  }
+
+  bool bOk;
+  StartPointLineEdit->text().toLong(&bOk);
+  if (!bOk) {
+    return false;
+  }
+
+  return true;
+}
+
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_ExtrusionAlongPathDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {
+    if(isValid() && isValuesValid()) {
+      
+      //Get selected elements:
+      SMESH::long_array_var anElementsId = getSelectedElements();
+
+      // get angles
+      SMESH::double_array_var anAngles = getAngles();
+      
+      // get base point
+      SMESH::PointStruct aBasePoint;
+      if (BasePointGrp->isChecked()) {
+	aBasePoint.x = XSpin->GetValue();
+	aBasePoint.y = YSpin->GetValue();
+	aBasePoint.z = ZSpin->GetValue();
+      }
+      bool bOk;
+      long aNodeStart = StartPointLineEdit->text().toLong(&bOk);
+      if (bOk) {
+	
+	try {
+	  SUIT_OverrideCursor wc;
+	  
+	  SMESH::SMESH_MeshEditor::Extrusion_Error retVal;
+	  SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+	  bool NeedGroups = false;
+	  SMESH::ElementType ElemType = SMESH::FACE;
+	  if( GetConstructorId() == 0 )
+	    ElemType = SMESH::EDGE;
+	  if( !MeshCheck->isChecked() ) {
+	    aMeshEditor->ExtrusionAlongPathX(anElementsId, myPath, aNodeStart, AnglesGrp->isChecked(),
+					     anAngles, LinearAnglesCheck->isChecked(),
+					     BasePointGrp->isChecked(), aBasePoint,
+					     NeedGroups, ElemType, retVal);
+	  }
+	  else {
+	    SMESH::ListOfGroups_var groups = 
+	      aMeshEditor->ExtrusionAlongPathObjX(myIDSource, myPath, aNodeStart, AnglesGrp->isChecked(),
+						  anAngles, LinearAnglesCheck->isChecked(),
+						  BasePointGrp->isChecked(), aBasePoint,
+						  NeedGroups, ElemType, retVal);
+	  }
+	  
+	  wc.suspend();
+	  if( retVal == SMESH::SMESH_MeshEditor::EXTR_OK ) {
+	    SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+	    mySimulation->SetData(aMeshPreviewStruct._retn());
+	  } else {
+	    hidePreview();
+	  }
+	  
+	} catch (...) {
+	  hidePreview();
+	}
+      } else {
+	hidePreview();
+      }
+      
+    } else {
+      hidePreview();
+    }
+  } else {
+    hidePreview();
+  }
+}
+
+
+//=================================================================================
+// function : getSelectedElements
+// purpose  : return list of the selected elements
+//=================================================================================
+SMESH::long_array_var SMESHGUI_ExtrusionAlongPathDlg::getSelectedElements() {
+
+  // If "Select whole mesh, submesh or group" check box is off ->
+  // use only elements of given type selected by user
+  SMESH::long_array_var anElementsId = new SMESH::long_array;
+  if (!MeshCheck->isChecked()) {
+    
+    SMDS_Mesh* aMesh;
+    if ( myMeshActor )
+      aMesh = myMeshActor->GetObject()->GetMesh();
+    
+    if (aMesh) {
+      QStringList aListElementsId = ElementsLineEdit->text().split(" ", QString::SkipEmptyParts);
+      anElementsId = new SMESH::long_array;
+      anElementsId->length(aListElementsId.count());
+      bool bOk;
+      int j = 0;
+      for (int i = 0; i < aListElementsId.count(); i++) {
+	long ind = aListElementsId[ i ].toLong(&bOk);
+	if  (bOk) {
+	  const SMDS_MeshElement* e = aMesh->FindElement(ind);
+	  if (e) {
+	    bool typeMatch = Elements1dRB->isChecked() && e->GetType() == SMDSAbs_Edge ||
+	      Elements2dRB->isChecked() && e->GetType() == SMDSAbs_Face;
+	    if (typeMatch)
+		  anElementsId[ j++ ] = ind;
+	  }
+	}
+      }
+      anElementsId->length(j);
+    }
+  }
+  return anElementsId;
+}
+
+SMESH::double_array_var SMESHGUI_ExtrusionAlongPathDlg::getAngles() {
+  SMESH::double_array_var anAngles = new SMESH::double_array;
+  if (AnglesGrp->isChecked()) {
+    anAngles->length(myAnglesList.count());
+    int j = 0;
+    for (int i = 0; i < myAnglesList.count(); i++) {
+      double angle = myAnglesList[i];
+      anAngles[ j++ ] = angle*PI/180;
+    }
+    anAngles->length(j);
+  }
+  return anAngles;
+}
diff --git a/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.h b/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.h
index 1049011cb..e39b58a30 100644
--- a/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.h
+++ b/src/SMESHGUI/SMESHGUI_ExtrusionAlongPathDlg.h
@@ -29,9 +29,7 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
-
-// Qt includes
-#include <QDialog>
+#include "SMESHGUI_PreviewDlg.h"
 
 // IDL includes
 #include <SALOMEconfig.h>
@@ -60,7 +58,7 @@ class SUIT_SelectionFilter;
 // class    : SMESHGUI_ExtrusionAlongPathDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_ExtrusionAlongPathDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_ExtrusionAlongPathDlg : public SMESHGUI_PreviewDlg
 {
   Q_OBJECT
 
@@ -81,10 +79,13 @@ private:
   void                      SetEditCurrentArgument( QToolButton* );
 
   bool                      isValid();
+  bool                      isValuesValid();
+  
+  SMESH::long_array_var     getSelectedElements();
+  SMESH::double_array_var   getAngles();
 
   void                      updateLinearAngles();
   
-  SMESHGUI*                 mySMESHGUI;            /* Current SMESHGUI object */
   SMESHGUI_IdValidator*     myIdValidator;
   LightApp_SelectionMgr*    mySelectionMgr;        /* User shape selection */
   SVTK_Selector*            mySelector;
@@ -147,6 +148,7 @@ private:
    
 protected slots:
   void                      reject();
+  virtual void              onDisplaySimulation( bool );
 
 private slots:
   void                      ConstructorsClicked( int );
diff --git a/src/SMESHGUI/SMESHGUI_ExtrusionDlg.cxx b/src/SMESHGUI/SMESHGUI_ExtrusionDlg.cxx
index b402a0dfe..0a8256bbe 100644
--- a/src/SMESHGUI/SMESHGUI_ExtrusionDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_ExtrusionDlg.cxx
@@ -34,6 +34,7 @@
 #include "SMESHGUI_SpinBox.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -88,8 +89,7 @@
 // purpose  : constructor
 //=================================================================================
 SMESHGUI_ExtrusionDlg::SMESHGUI_ExtrusionDlg (SMESHGUI* theModule)
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+  : SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myFilterDlg( 0 ),
     mySelectedObject(SMESH::SMESH_IDSource::_nil())
@@ -215,6 +215,9 @@ SMESHGUI_ExtrusionDlg::SMESHGUI_ExtrusionDlg (SMESHGUI* theModule)
   // CheckBox for groups generation
   MakeGroupsCheck = new QCheckBox(tr("SMESH_MAKE_GROUPS"), GroupArguments);
 
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   GroupArgumentsLayout->addWidget(TextLabelElements,    0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
   GroupArgumentsLayout->addWidget(LineEditElements,     0, 2, 1, 5);
@@ -241,7 +244,8 @@ SMESHGUI_ExtrusionDlg::SMESHGUI_ExtrusionDlg (SMESHGUI* theModule)
   GroupArgumentsLayout->addWidget(SpinBox_VDist,         5, 3);
   GroupArgumentsLayout->addWidget(TextLabelNbSteps,     6, 0, 1, 3);
   GroupArgumentsLayout->addWidget(SpinBox_NbSteps,      6, 3);
-  GroupArgumentsLayout->addWidget(MakeGroupsCheck,      7, 0, 1, 8);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    7, 0, 1, 8);
+  GroupArgumentsLayout->addWidget(MakeGroupsCheck,      8, 0, 1, 8);
   GroupArgumentsLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::Expanding), 8, 0);
 
 
@@ -313,6 +317,18 @@ SMESHGUI_ExtrusionDlg::SMESHGUI_ExtrusionDlg (SMESHGUI* theModule)
   connect(LineEditElements,     SIGNAL(textChanged(const QString&)), SLOT(onTextChange(const QString&)));
   connect(CheckBoxMesh,         SIGNAL(toggled(bool)),               SLOT(onSelectMesh(bool)));
 
+  connect(SpinBox_Dx,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Dy,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Dz,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Vx,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Vy,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Vz,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_VDist,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_NbSteps,  SIGNAL(valueChanged(int)), this, SLOT(toDisplaySimulation()));
+
+  //To Connect preview check box
+  connectPreviewControl();
+
   /***************************************************************/
   
   ConstructorsClicked(0);
@@ -359,6 +375,8 @@ void SMESHGUI_ExtrusionDlg::Init (bool ResetControls)
 
     CheckBoxMesh->setChecked(false);
     onSelectMesh(false);
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
   }
 
   CheckIsEnable();
@@ -369,8 +387,19 @@ void SMESHGUI_ExtrusionDlg::Init (bool ResetControls)
 // purpose  : Check whether the Ok and Apply buttons should be enabled or not
 //=================================================================================
 void SMESHGUI_ExtrusionDlg::CheckIsEnable()
-{
-  double aX, aY, aZ, aModule;
+{  
+  bool anIsEnable = myNbOkElements > 0 && isValuesValid();
+
+  buttonOk->setEnabled(anIsEnable);
+  buttonApply->setEnabled(anIsEnable);
+}
+
+//=================================================================================
+// function : isValuesValid()
+// purpose  : Return true in case if values entered into dialog are valid
+//=================================================================================
+bool SMESHGUI_ExtrusionDlg::isValuesValid() {
+  double aX, aY, aZ, aModule = 0;
   if ( RadioButton3->isChecked() ) {
     aX = SpinBox_Dx->GetValue();
     aY = SpinBox_Dy->GetValue();
@@ -382,11 +411,7 @@ void SMESHGUI_ExtrusionDlg::CheckIsEnable()
     aZ = SpinBox_Vz->GetValue();
     aModule = sqrt(aX*aX + aY*aY + aZ*aZ);
   }
-  
-  bool anIsEnable = myNbOkElements > 0 && aModule > 1.0E-38;
-
-  buttonOk->setEnabled(anIsEnable);
-  buttonApply->setEnabled(anIsEnable);
+  return aModule > 1.0E-38;
 }
 
 //=================================================================================
@@ -397,6 +422,8 @@ void SMESHGUI_ExtrusionDlg::ConstructorsClicked (int constructorId)
 {
   disconnect(mySelectionMgr, 0, this, 0);
 
+  hidePreview();
+
   switch (constructorId) {
   case 0:
     {
@@ -478,6 +505,7 @@ void SMESHGUI_ExtrusionDlg::ClickOnRadio()
     SpinBox_VDist->show();
     SelectVectorButton->show();
   }
+  onDisplaySimulation(true);
   // AdjustSize
   qApp->processEvents();
   updateGeometry();
@@ -499,29 +527,14 @@ bool SMESHGUI_ExtrusionDlg::ClickOnApply()
   if (myNbOkElements) {
 
     SMESH::DirStruct aVector;
+    getExtrusionVector(aVector);
+    
     QStringList aParameters;
-
     if ( RadioButton3->isChecked() ) {
-      aVector.PS.x = SpinBox_Dx->GetValue();
-      aVector.PS.y = SpinBox_Dy->GetValue();
-      aVector.PS.z = SpinBox_Dz->GetValue();
-
       aParameters << SpinBox_Dx->text();
       aParameters << SpinBox_Dy->text();
       aParameters << SpinBox_Dz->text();
     } else if ( RadioButton4->isChecked() ) {
-      gp_XYZ aNormale(SpinBox_Vx->GetValue(),
-                      SpinBox_Vy->GetValue(),
-                      SpinBox_Vz->GetValue());
-    
-     
-      aNormale /= aNormale.Modulus();
-      long aVDist = (long)SpinBox_VDist->value();
-
-      aVector.PS.x = aNormale.X()*aVDist;
-      aVector.PS.y = aNormale.Y()*aVDist;
-      aVector.PS.z = aNormale.Z()*aVDist;
-
       aParameters << SpinBox_Vx->text();
       aParameters << SpinBox_Vy->text();
       aParameters << SpinBox_Vz->text();
@@ -676,6 +689,8 @@ void SMESHGUI_ExtrusionDlg::onTextChange (const QString& theNewText)
 
   CheckIsEnable();
 
+  onDisplaySimulation(true);
+
   myBusy = false;
 }
 
@@ -786,6 +801,8 @@ void SMESHGUI_ExtrusionDlg::SelectionIntoArgument()
     
   }
   
+  onDisplaySimulation(true);
+  
   // OK
   CheckIsEnable();
 }
@@ -1036,3 +1053,66 @@ bool SMESHGUI_ExtrusionDlg::isValid()
   }
   return true;
 }
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_ExtrusionDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {
+    if (myNbOkElements && isValid() && isValuesValid()) {
+      //Get input vector
+      SMESH::DirStruct aVector;
+      getExtrusionVector(aVector);
+
+      //Get Number of the steps 
+      long aNbSteps = (long)SpinBox_NbSteps->value();
+      
+      try {
+	SUIT_OverrideCursor aWaitCursor;
+	SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+        if( CheckBoxMesh->isChecked() ) {
+          if( GetConstructorId() == 0 )
+            aMeshEditor->ExtrusionSweepObject1D(mySelectedObject, aVector, aNbSteps);
+          else
+            aMeshEditor->ExtrusionSweepObject2D(mySelectedObject, aVector, aNbSteps);
+        }
+        else
+          aMeshEditor->ExtrusionSweep(myElementsId.inout(), aVector, aNbSteps);
+	
+        SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+        mySimulation->SetData(aMeshPreviewStruct._retn());
+      } catch (...) {
+	hidePreview();
+      }
+    } else {
+      hidePreview();
+    }
+  } else {
+    hidePreview();
+  }
+}
+
+//=================================================================================
+// function : getExtrusionVector()
+// purpose  : get direction of the extrusion
+//=================================================================================
+void SMESHGUI_ExtrusionDlg::getExtrusionVector(SMESH::DirStruct& aVector) {
+  if ( RadioButton3->isChecked() ) {
+    aVector.PS.x = SpinBox_Dx->GetValue();
+    aVector.PS.y = SpinBox_Dy->GetValue();
+    aVector.PS.z = SpinBox_Dz->GetValue();	
+  } else if ( RadioButton4->isChecked() ) {
+    gp_XYZ aNormale(SpinBox_Vx->GetValue(),
+		    SpinBox_Vy->GetValue(),
+		    SpinBox_Vz->GetValue());
+    
+    
+    aNormale /= aNormale.Modulus();
+    long aVDist = (long)SpinBox_VDist->value();
+    
+    aVector.PS.x = aNormale.X()*aVDist;
+    aVector.PS.y = aNormale.Y()*aVDist;
+    aVector.PS.z = aNormale.Z()*aVDist;
+  }
+}
diff --git a/src/SMESHGUI/SMESHGUI_ExtrusionDlg.h b/src/SMESHGUI/SMESHGUI_ExtrusionDlg.h
index 543fe2827..2795b87d0 100644
--- a/src/SMESHGUI/SMESHGUI_ExtrusionDlg.h
+++ b/src/SMESHGUI/SMESHGUI_ExtrusionDlg.h
@@ -29,13 +29,11 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
+#include "SMESHGUI_PreviewDlg.h"
 
 // SALOME GUI includes
 #include <SALOME_InteractiveObject.hxx>
 
-// Qt includes
-#include <QDialog>
-
 // IDL includes
 #include <SALOMEconfig.h>
 #include CORBA_SERVER_HEADER(SMESH_Mesh)
@@ -62,7 +60,7 @@ class SalomeApp_IntSpinBox;
 // class    : SMESHGUI_ExtrusionDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_ExtrusionDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_ExtrusionDlg : public SMESHGUI_PreviewDlg
 {
   Q_OBJECT
 
@@ -78,10 +76,11 @@ private:
   void                             closeEvent( QCloseEvent* );
   void                             keyPressEvent( QKeyEvent* );
   int                              GetConstructorId();
-
+  void                             getExtrusionVector(SMESH::DirStruct& aVector);
+  
   bool                             isValid();
+  bool                             isValuesValid();
   
-  SMESHGUI*                        mySMESHGUI;            /* Current SMESHGUI object */
   SMESHGUI_IdValidator*            myIdValidator;
   LightApp_SelectionMgr*           mySelectionMgr;        /* User shape selection */
   QWidget*                         myEditCurrentArgument; /* Current  argument editor */
@@ -143,6 +142,9 @@ private:
 
   QPushButton*                     myFilterBtn;
   SMESHGUI_FilterDlg*              myFilterDlg;
+
+protected slots:
+  virtual void              onDisplaySimulation( bool );
    
 private slots:
   void                            ConstructorsClicked( int );
diff --git a/src/SMESHGUI/SMESHGUI_PreviewDlg.cxx b/src/SMESHGUI/SMESHGUI_PreviewDlg.cxx
new file mode 100644
index 000000000..5dc2818e1
--- /dev/null
+++ b/src/SMESHGUI/SMESHGUI_PreviewDlg.cxx
@@ -0,0 +1,103 @@
+//  Copyright (C) 2007-2010  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
+//
+
+// SMESH SMESHGUI : GUI for SMESH component
+// File   : SMESHGUI_PreviewDlg.cxx
+// Author : Roman NIKOLAEV, Open CASCADE S.A.S.
+// SMESH includes
+//
+
+//SMESH includes
+#include "SMESHGUI.h"
+#include "SMESHGUI_PreviewDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
+#include "SMESHGUI_VTKUtils.h"
+#include "SMESHGUI_Utils.h"
+
+//GUI includes
+#include <SUIT_Desktop.h>
+
+//QT includes
+#include <QCheckBox>
+
+
+//=================================================================================
+// class    : SMESHGUI_SMESHGUI_PreviewDlg()
+// purpose  :
+//=================================================================================
+SMESHGUI_PreviewDlg::SMESHGUI_PreviewDlg(SMESHGUI* theModule) :
+  mySMESHGUI(theModule),
+  QDialog(SMESH::GetDesktop( theModule )) {
+  mySimulation = new SMESHGUI_MeshEditPreview(SMESH::GetViewWindow( mySMESHGUI ));
+}
+
+//=================================================================================
+// function : ~SMESHGUI_PreviewDlg()
+// purpose  : Destroys the object and frees any allocated resources
+//=================================================================================
+SMESHGUI_PreviewDlg::~SMESHGUI_PreviewDlg()
+{
+  delete mySimulation;
+}
+
+//=================================================================================
+// function : showPreview
+// purpose  : Show preview in the viewer
+//=================================================================================
+void SMESHGUI_PreviewDlg::showPreview(){
+  if(mySimulation)
+    mySimulation->SetVisibility(true);
+}
+
+//=================================================================================
+// function : hidePreview
+// purpose  : Hide preview in the viewer
+//=================================================================================
+void SMESHGUI_PreviewDlg::hidePreview(){
+  if(mySimulation)
+    mySimulation->SetVisibility(false);
+}
+
+//=================================================================================
+// function : connectPreviewControl
+// purpose  : Connect the preview check box
+//=================================================================================
+void SMESHGUI_PreviewDlg::connectPreviewControl(){
+  connect(myPreviewCheckBox, SIGNAL(toggled(bool)), this, SLOT(onDisplaySimulation(bool)));
+}
+
+
+//=================================================================================
+// function : toDisplaySimulation
+// purpose  : 
+//=================================================================================
+void SMESHGUI_PreviewDlg::toDisplaySimulation() {
+  onDisplaySimulation(true);
+}
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : 
+//=================================================================================
+void SMESHGUI_PreviewDlg::onDisplaySimulation(bool toDisplayPreview) {
+  //Empty implementation here
+}
diff --git a/src/SMESHGUI/SMESHGUI_PreviewDlg.h b/src/SMESHGUI/SMESHGUI_PreviewDlg.h
new file mode 100644
index 000000000..517170c75
--- /dev/null
+++ b/src/SMESHGUI/SMESHGUI_PreviewDlg.h
@@ -0,0 +1,63 @@
+//  Copyright (C) 2007-2010  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
+//
+
+// SMESH SMESHGUI : GUI for SMESH component
+// File   : SMESHGUI_RotationDlg.h
+// Author : Roman NIKOLAEV, Open CASCADE S.A.S.
+//
+#ifndef SMESHGUI_PREVIEWDLG_H
+#define SMESHGUI_PREVIEWDLG_H
+
+// SMESH includes
+#include "SMESH_SMESHGUI.hxx"
+
+// Qt includes
+#include <QDialog>
+
+class SMESHGUI;
+class SMESHGUI_MeshEditPreview;
+class QCheckBox;
+
+class SMESHGUI_EXPORT SMESHGUI_PreviewDlg : public QDialog {
+  Q_OBJECT
+public:
+  SMESHGUI_PreviewDlg( SMESHGUI* );
+  ~SMESHGUI_PreviewDlg();
+
+  void showPreview();
+  void hidePreview();
+
+protected:
+  void connectPreviewControl();
+
+protected slots:
+ void                      toDisplaySimulation();
+ virtual void              onDisplaySimulation( bool );
+
+  
+protected:
+  SMESHGUI*                 mySMESHGUI;              /* Current SMESHGUI object */  
+  SMESHGUI_MeshEditPreview* mySimulation;
+  QCheckBox*                myPreviewCheckBox;
+};
+
+#endif
diff --git a/src/SMESHGUI/SMESHGUI_RevolutionDlg.cxx b/src/SMESHGUI/SMESHGUI_RevolutionDlg.cxx
index d292d2996..f2f5661b9 100644
--- a/src/SMESHGUI/SMESHGUI_RevolutionDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_RevolutionDlg.cxx
@@ -89,8 +89,7 @@
 // purpose  :
 //=================================================================================
 SMESHGUI_RevolutionDlg::SMESHGUI_RevolutionDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+  : SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myVectorDefinition(NONE_SELECT),
     myFilterDlg( 0 ),
@@ -232,7 +231,7 @@ SMESHGUI_RevolutionDlg::SMESHGUI_RevolutionDlg( SMESHGUI* theModule )
   SpinBox_Tolerance = new SMESHGUI_SpinBox(GroupArguments);
 
   // Control for mesh preview
-  CheckBoxPreview = new QCheckBox(tr("PREVIEW"), GroupArguments);
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
 
   // CheckBox for groups generation
   MakeGroupsCheck = new QCheckBox(tr("SMESH_MAKE_GROUPS"), GroupArguments);
@@ -247,7 +246,7 @@ SMESHGUI_RevolutionDlg::SMESHGUI_RevolutionDlg( SMESHGUI* theModule )
   GroupArgumentsLayout->addWidget(GroupAngleBox,        3, 0, 1, 4);
   GroupArgumentsLayout->addWidget(TextLabelTolerance,   4, 0, 1, 2);
   GroupArgumentsLayout->addWidget(SpinBox_Tolerance,    4, 2, 1, 2);
-  GroupArgumentsLayout->addWidget(CheckBoxPreview,      5, 0, 1, 4);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    5, 0, 1, 4);
   GroupArgumentsLayout->addWidget(MakeGroupsCheck,      6, 0, 1, 4);
 
   /***************************************************************/
@@ -352,7 +351,9 @@ SMESHGUI_RevolutionDlg::SMESHGUI_RevolutionDlg( SMESHGUI* theModule )
   connect(SpinBox_Angle,     SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
   connect(SpinBox_NbSteps,   SIGNAL(valueChanged(int)),    this, SLOT(toDisplaySimulation()));
   connect(SpinBox_Tolerance, SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
-  connect(CheckBoxPreview,   SIGNAL(toggled(bool)),        this, SLOT(onDisplaySimulation(bool)));
+
+  //To Connect preview check box
+  connectPreviewControl();
 
   connect(SpinBox_Angle, SIGNAL(textChanged(const QString&)), this, SLOT(onAngleTextChange(const QString&)));
 
@@ -405,7 +406,7 @@ void SMESHGUI_RevolutionDlg::Init (bool ResetControls)
 
     CheckBoxMesh->setChecked(false);
     onSelectMesh(false);
-    CheckBoxPreview->setChecked(false);
+    myPreviewCheckBox->setChecked(false);
     onDisplaySimulation(false);
   }
 }
@@ -707,7 +708,7 @@ void SMESHGUI_RevolutionDlg::SelectionIntoArgument()
   const SALOME_ListIO& aList = mySelector->StoredIObjects();
 
   int nbSel = aList.Extent();
-  if (nbSel != 1)
+  if (nbSel != 1) 
     return;
 
   Handle(SALOME_InteractiveObject) IO = aList.First();
@@ -1033,22 +1034,13 @@ void SMESHGUI_RevolutionDlg::keyPressEvent( QKeyEvent* e )
   }
 }
 
-//=================================================================================
-// function : toDisplaySimulation()
-// purpose  :
-//=================================================================================
-void SMESHGUI_RevolutionDlg::toDisplaySimulation()
-{
-  onDisplaySimulation(true);
-}
-
 //=================================================================================
 // function : onDisplaySimulation()
-// purpose  :
+// purpose  : Show/Hide preview
 //=================================================================================
 void SMESHGUI_RevolutionDlg::onDisplaySimulation(bool toDisplayPreview)
 {
-  if (CheckBoxPreview->isChecked() && toDisplayPreview)
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview)
   {
     //display preview
     if (myNbOkElements && IsAxisOk())
diff --git a/src/SMESHGUI/SMESHGUI_RevolutionDlg.h b/src/SMESHGUI/SMESHGUI_RevolutionDlg.h
index 44eae2fd3..7b7768fa9 100644
--- a/src/SMESHGUI/SMESHGUI_RevolutionDlg.h
+++ b/src/SMESHGUI/SMESHGUI_RevolutionDlg.h
@@ -29,12 +29,12 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
+#include "SMESHGUI_PreviewDlg.h"
 
 // SALOME GUI includes
 #include <SALOME_InteractiveObject.hxx>
 
 // Qt includes
-#include <QDialog>
 #include <QMap>
 
 // IDL includes
@@ -66,7 +66,7 @@ class QAction;
 // class    : SMESHGUI_RevolutionDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_RevolutionDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_RevolutionDlg : public SMESHGUI_PreviewDlg
 { 
   Q_OBJECT
 
@@ -88,7 +88,6 @@ private:
   
   bool                      isValid();
   
-  SMESHGUI*                 mySMESHGUI;              /* Current SMESHGUI object */
   SMESHGUI_IdValidator*     myIdValidator;
   LightApp_SelectionMgr*    mySelectionMgr;          /* User shape selection */
   int                       myNbOkElements;          /* to check when elements are defined */
@@ -126,7 +125,6 @@ private:
   QButtonGroup*             GroupAngle;
   QRadioButton*             RadioButton3;
   QRadioButton*             RadioButton4;
-  QCheckBox*                CheckBoxPreview;
   
   QLabel*                   TextLabelPoint;
   QPushButton*              SelectPointButton;
@@ -162,6 +160,9 @@ private:
   
   QPushButton*              myFilterBtn;
   SMESHGUI_FilterDlg*       myFilterDlg;
+
+protected slots:
+  virtual void              onDisplaySimulation( bool );
    
 private slots:
   void                      ConstructorsClicked( int );
@@ -177,8 +178,6 @@ private slots:
   void                      onAngleTextChange( const QString& );
   void                      onSelectMesh( bool );
   void                      onVectorChanged();
-  void                      toDisplaySimulation();
-  void                      onDisplaySimulation( bool );
   void                      onSelectVectorMenu( QAction* );
   void                      onSelectVectorButton();
   void                      setFilters();
diff --git a/src/SMESHGUI/SMESHGUI_RotationDlg.cxx b/src/SMESHGUI/SMESHGUI_RotationDlg.cxx
index 46d8ba53c..d13cabbf1 100644
--- a/src/SMESHGUI/SMESHGUI_RotationDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_RotationDlg.cxx
@@ -33,6 +33,7 @@
 #include "SMESHGUI_MeshUtils.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -91,9 +92,8 @@ enum { MOVE_ELEMS_BUTTON = 0, COPY_ELEMS_BUTTON, MAKE_MESH_BUTTON }; //!< action
 // class    : SMESHGUI_RotationDlg()
 // purpose  :
 //=================================================================================
-SMESHGUI_RotationDlg::SMESHGUI_RotationDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+SMESHGUI_RotationDlg::SMESHGUI_RotationDlg( SMESHGUI* theModule ) :
+    SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myFilterDlg(0),
     mySelectedObject(SMESH::SMESH_IDSource::_nil())
@@ -217,6 +217,10 @@ SMESHGUI_RotationDlg::SMESHGUI_RotationDlg( SMESHGUI* theModule )
   // Name of a mesh to create
   LineEditNewMesh = new QLineEdit(GroupArguments);
 
+
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   GroupArgumentsLayout->addWidget(TextLabelElements,    0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
   GroupArgumentsLayout->addWidget(LineEditElements,     0, 2, 1, 1);
@@ -228,6 +232,8 @@ SMESHGUI_RotationDlg::SMESHGUI_RotationDlg( SMESHGUI* theModule )
   GroupArgumentsLayout->addWidget(ActionBox,            4, 0, 3, 3);
   GroupArgumentsLayout->addWidget(MakeGroupsCheck,      5, 3);
   GroupArgumentsLayout->addWidget(LineEditNewMesh,      6, 3);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    7, 0);
+
 
   /***************************************************************/
   GroupButtons = new QGroupBox(this);
@@ -312,6 +318,17 @@ SMESHGUI_RotationDlg::SMESHGUI_RotationDlg( SMESHGUI* theModule )
   connect(CheckBoxMesh,     SIGNAL(toggled(bool)),                  SLOT(onSelectMesh(bool)));
   connect(ActionGroup,      SIGNAL(buttonClicked(int)),             SLOT(onActionClicked(int)));
 
+  connect(SpinBox_X,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Y,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Z,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DX,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DY,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DZ,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Angle,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  //To Connect preview check box
+  connectPreviewControl();
+
   onActionClicked(MOVE_ELEMS_BUTTON);
 }
 
@@ -359,6 +376,9 @@ void SMESHGUI_RotationDlg::Init (bool ResetControls)
 
     ActionGroup->button( MOVE_ELEMS_BUTTON )->setChecked(true);
     CheckBoxMesh->setChecked(false);
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
+
 //     MakeGroupsCheck->setChecked(false);
 //     MakeGroupsCheck->setEnabled(false);
 //    onSelectMesh(false);
@@ -737,6 +757,7 @@ void SMESHGUI_RotationDlg::SelectionIntoArgument()
     buttonOk->setEnabled(true);
     buttonApply->setEnabled(true);
   }
+  onDisplaySimulation(true);
 }
 
 //=================================================================================
@@ -883,6 +904,7 @@ void SMESHGUI_RotationDlg::onSelectMesh (bool toSelectMesh)
     LineEditElements->setReadOnly(false);
     LineEditElements->setValidator(myIdValidator);
     onTextChange(LineEditElements->text());
+    hidePreview();
   }
 
   SelectionIntoArgument();
@@ -1033,3 +1055,51 @@ bool SMESHGUI_RotationDlg::isValid()
   }
   return true;
 }
+
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_RotationDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {
+    if(myNbOkElements && isValid() && IsAxisOk()) {
+      QStringList aListElementsId = myElementsId.split(" ", QString::SkipEmptyParts);
+      SMESH::long_array_var anElementsId = new SMESH::long_array;
+      
+      anElementsId->length(aListElementsId.count());
+      for (int i = 0; i < aListElementsId.count(); i++)
+	anElementsId[i] = aListElementsId[i].toInt();
+      
+      SMESH::AxisStruct anAxis;
+      
+      anAxis.x =  SpinBox_X->GetValue();
+      anAxis.y =  SpinBox_Y->GetValue();
+      anAxis.z =  SpinBox_Z->GetValue();;
+      anAxis.vx = SpinBox_DX->GetValue();
+      anAxis.vy = SpinBox_DY->GetValue();
+      anAxis.vz = SpinBox_DZ->GetValue();
+      double anAngle = (SpinBox_Angle->GetValue())*PI/180;
+      
+      try {
+	SUIT_OverrideCursor aWaitCursor;
+	bool copy = ActionGroup->checkedId() == COPY_ELEMS_BUTTON;
+	SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+	if(CheckBoxMesh->isChecked())
+	  aMeshEditor->RotateObject(mySelectedObject, anAxis, anAngle, copy);
+	else
+	  aMeshEditor->Rotate(anElementsId, anAxis, anAngle, copy);
+
+        SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+        mySimulation->SetData(aMeshPreviewStruct._retn());	
+      } catch (...) {
+	hidePreview();
+      }
+    }
+    else {
+      hidePreview();
+    }
+  } else {
+    hidePreview();
+  }
+}
diff --git a/src/SMESHGUI/SMESHGUI_RotationDlg.h b/src/SMESHGUI/SMESHGUI_RotationDlg.h
index ae74f7cda..c8431c932 100644
--- a/src/SMESHGUI/SMESHGUI_RotationDlg.h
+++ b/src/SMESHGUI/SMESHGUI_RotationDlg.h
@@ -29,9 +29,8 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
+#include "SMESHGUI_PreviewDlg.h"
 
-// Qt includes
-#include <QDialog>
 
 // IDL includes
 #include <SALOMEconfig.h>
@@ -57,7 +56,7 @@ class SMESH_LogicalFilter;
 // class    : SMESHGUI_RotationDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_RotationDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_RotationDlg : public SMESHGUI_PreviewDlg
 { 
   Q_OBJECT
 
@@ -76,7 +75,6 @@ private:
   
   bool                   isValid();
 
-  SMESHGUI*              mySMESHGUI;              /* Current SMESHGUI object */
   SMESHGUI_IdValidator*  myIdValidator;
   LightApp_SelectionMgr* mySelectionMgr;          /* User shape selection */
   int                    myNbOkElements;          /* to check when elements are defined */
@@ -135,6 +133,9 @@ private:
   QPushButton*           myFilterBtn;
   SMESHGUI_FilterDlg*    myFilterDlg;
 
+protected slots:
+  virtual void              onDisplaySimulation( bool );
+ 
 private slots:
   void                   ClickOnOk();
   void                   ClickOnCancel();
diff --git a/src/SMESHGUI/SMESHGUI_ScaleDlg.cxx b/src/SMESHGUI/SMESHGUI_ScaleDlg.cxx
index f7b636e7d..7a8dcb442 100644
--- a/src/SMESHGUI/SMESHGUI_ScaleDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_ScaleDlg.cxx
@@ -30,6 +30,7 @@
 #include "SMESHGUI_MeshUtils.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -106,9 +107,8 @@ private:
 // class    : SMESHGUI_ScaleDlg()
 // purpose  :
 //=================================================================================
-SMESHGUI_ScaleDlg::SMESHGUI_ScaleDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+SMESHGUI_ScaleDlg::SMESHGUI_ScaleDlg( SMESHGUI* theModule ) : 
+    SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myFilterDlg(0),
     mySelectedObject(SMESH::SMESH_IDSource::_nil())
@@ -211,6 +211,9 @@ SMESHGUI_ScaleDlg::SMESHGUI_ScaleDlg( SMESHGUI* theModule )
   // Name of a mesh to create
   LineEditNewMesh = new QLineEdit(GroupArguments);
 
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   // layout
   GroupArgumentsLayout->addWidget(TextLabelElements,    0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
@@ -234,6 +237,7 @@ SMESHGUI_ScaleDlg::SMESHGUI_ScaleDlg( SMESHGUI* theModule )
   GroupArgumentsLayout->addWidget(ActionBox,            7, 0, 3, 4);
   GroupArgumentsLayout->addWidget(MakeGroupsCheck,      7, 5, 1, 4);
   GroupArgumentsLayout->addWidget(LineEditNewMesh,      8, 5, 1, 4);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    10, 0);
 
   /***************************************************************/
   GroupButtons = new QGroupBox(this);
@@ -314,6 +318,17 @@ SMESHGUI_ScaleDlg::SMESHGUI_ScaleDlg( SMESHGUI* theModule )
   connect(CheckBoxMesh,     SIGNAL(toggled(bool)),                  SLOT(onSelectMesh(bool)));
   connect(ActionGroup,      SIGNAL(buttonClicked(int)),             SLOT(onActionClicked(int)));
 
+  connect(SpinBox1_1,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox1_2,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox1_3,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  connect(SpinBox_FX,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_FY,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_FZ,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  //To Connect preview check box
+  connectPreviewControl();
+
   ConstructorsClicked(0);
   SelectionIntoArgument();
   onActionClicked(MOVE_ELEMS_BUTTON);
@@ -358,6 +373,8 @@ void SMESHGUI_ScaleDlg::Init (bool ResetControls)
     SpinBox_FX->SetValue(1.0);
     SpinBox_FY->SetValue(1.0);
     SpinBox_FZ->SetValue(1.0);
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
 
     ActionGroup->button( MOVE_ELEMS_BUTTON )->setChecked(true);
     CheckBoxMesh->setChecked(false);
@@ -436,20 +453,8 @@ bool SMESHGUI_ScaleDlg::ClickOnApply()
       anElementsId[i] = aListElementsId[i].toInt();
 
     SMESH::PointStruct aPoint;
-    aPoint.x = SpinBox1_1->GetValue();
-    aPoint.y = SpinBox1_2->GetValue();
-    aPoint.z = SpinBox1_3->GetValue();
     SMESH::double_array_var aScaleFact = new SMESH::double_array;
-    aScaleFact->length(3);
-    aScaleFact[0] = SpinBox_FX->GetValue();
-    if (GetConstructorId() == 0) {
-      aScaleFact[1] = SpinBox_FX->GetValue();
-      aScaleFact[2] = SpinBox_FX->GetValue();
-    }
-    else {
-      aScaleFact[1] = SpinBox_FY->GetValue();
-      aScaleFact[2] = SpinBox_FZ->GetValue();
-    }
+    getScale(aPoint, aScaleFact);
 
     QStringList aParameters;
     aParameters << SpinBox1_1->text();
@@ -785,6 +790,8 @@ void SMESHGUI_ScaleDlg::SelectionIntoArgument()
     buttonOk->setEnabled(true);
     buttonApply->setEnabled(true);
   }
+  
+  onDisplaySimulation(true);
 }
 
 //=================================================================================
@@ -921,6 +928,7 @@ void SMESHGUI_ScaleDlg::onSelectMesh (bool toSelectMesh)
     LineEditElements->setReadOnly(false);
     LineEditElements->setValidator(myIdValidator);
     onTextChange(LineEditElements->text());
+    hidePreview();
   }
 
   SelectionIntoArgument();
@@ -1054,3 +1062,68 @@ bool SMESHGUI_ScaleDlg::isValid()
   }
   return true;
 }
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_ScaleDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {    
+    if ( myNbOkElements && isValid() ) {
+      QStringList aListElementsId = myElementsId.split(" ", QString::SkipEmptyParts);
+
+      SMESH::long_array_var anElementsId = new SMESH::long_array;
+      
+      anElementsId->length(aListElementsId.count());
+      for (int i = 0; i < aListElementsId.count(); i++)
+	anElementsId[i] = aListElementsId[i].toInt();
+      
+      SMESH::PointStruct aPoint;
+      SMESH::double_array_var aScaleFact = new SMESH::double_array;
+      getScale(aPoint, aScaleFact);
+      
+      try {
+	bool copy = ActionGroup->checkedId() == COPY_ELEMS_BUTTON;
+	SUIT_OverrideCursor aWaitCursor;
+	SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+	SMESH::SMESH_IDSource_var obj;
+	if ( CheckBoxMesh->isChecked() )
+	  obj = mySelectedObject;
+	else
+	  obj = aMeshEditor->MakeIDSource(anElementsId, SMESH::ALL);
+	aMeshEditor->Scale(obj, aPoint, aScaleFact, copy);
+
+        SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+        mySimulation->SetData(aMeshPreviewStruct._retn());	
+
+      } catch (...) {
+	hidePreview();
+      }
+    } else {
+      hidePreview();
+    } 
+  } else {
+    hidePreview();
+  }
+}
+
+//=================================================================================
+// function : getScale
+// purpose  : get scale parameters
+//=================================================================================
+void SMESHGUI_ScaleDlg::getScale( SMESH::PointStruct& thePoint ,  SMESH::double_array_var& theScaleFact) {
+  thePoint.x = SpinBox1_1->GetValue();
+  thePoint.y = SpinBox1_2->GetValue();
+  thePoint.z = SpinBox1_3->GetValue();
+  
+  theScaleFact->length(3);
+  theScaleFact[0] = SpinBox_FX->GetValue();
+  if (GetConstructorId() == 0) {
+    theScaleFact[1] = SpinBox_FX->GetValue();
+    theScaleFact[2] = SpinBox_FX->GetValue();
+  }
+  else {
+    theScaleFact[1] = SpinBox_FY->GetValue();
+    theScaleFact[2] = SpinBox_FZ->GetValue();
+  } 
+}
diff --git a/src/SMESHGUI/SMESHGUI_ScaleDlg.h b/src/SMESHGUI/SMESHGUI_ScaleDlg.h
index f7287d50a..be405ffa8 100644
--- a/src/SMESHGUI/SMESHGUI_ScaleDlg.h
+++ b/src/SMESHGUI/SMESHGUI_ScaleDlg.h
@@ -26,9 +26,7 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
-
-// Qt includes
-#include <QDialog>
+#include "SMESHGUI_PreviewDlg.h"
 
 // IDL includes
 #include <SALOMEconfig.h>
@@ -54,7 +52,7 @@ class SMESH_LogicalFilter;
 // class    : SMESHGUI_ScaleDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_ScaleDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_ScaleDlg : public SMESHGUI_PreviewDlg
 { 
   Q_OBJECT
 
@@ -72,8 +70,9 @@ private:
   void                   setNewMeshName();
 
   bool                   isValid();
+  void                   getScale( SMESH::PointStruct& thePoint,
+				   SMESH::double_array_var& theScaleFact);
 
-  SMESHGUI*              mySMESHGUI;              /* Current SMESHGUI object */
   SMESHGUI_IdValidator*  myIdValidator;
   LightApp_SelectionMgr* mySelectionMgr;          /* User shape selection */
   QString                myElementsId;
@@ -127,6 +126,10 @@ private:
 
   QPushButton*           myFilterBtn;
   SMESHGUI_FilterDlg*    myFilterDlg;
+
+
+protected slots:
+  virtual void              onDisplaySimulation( bool );
    
 private slots:
   void                   ConstructorsClicked( int );
diff --git a/src/SMESHGUI/SMESHGUI_SymmetryDlg.cxx b/src/SMESHGUI/SMESHGUI_SymmetryDlg.cxx
index e0abb8cc1..9d73fc6c4 100644
--- a/src/SMESHGUI/SMESHGUI_SymmetryDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_SymmetryDlg.cxx
@@ -33,6 +33,7 @@
 #include "SMESHGUI_MeshUtils.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -93,8 +94,7 @@ enum { MOVE_ELEMS_BUTTON = 0, COPY_ELEMS_BUTTON, MAKE_MESH_BUTTON }; //!< action
 //=================================================================================
 
 SMESHGUI_SymmetryDlg::SMESHGUI_SymmetryDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
+  : SMESHGUI_PreviewDlg( theModule ),
     mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
     myFilterDlg(0),
     mySelectedObject(SMESH::SMESH_IDSource::_nil())
@@ -225,6 +225,10 @@ SMESHGUI_SymmetryDlg::SMESHGUI_SymmetryDlg( SMESHGUI* theModule )
   // Name of a mesh to create
   LineEditNewMesh = new QLineEdit(GroupArguments);
 
+
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   // layout
   GroupArgumentsLayout->addWidget(TextLabelElements,    0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
@@ -235,6 +239,7 @@ SMESHGUI_SymmetryDlg::SMESHGUI_SymmetryDlg( SMESHGUI* theModule )
   GroupArgumentsLayout->addWidget(ActionBox,            3, 0, 3, 3);
   GroupArgumentsLayout->addWidget(MakeGroupsCheck,      4, 3);
   GroupArgumentsLayout->addWidget(LineEditNewMesh,      5, 3);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    6, 0);
 
   /***************************************************************/
   GroupButtons = new QGroupBox(this);
@@ -317,6 +322,16 @@ SMESHGUI_SymmetryDlg::SMESHGUI_SymmetryDlg( SMESHGUI* theModule )
   connect(CheckBoxMesh,     SIGNAL(toggled(bool)),                 SLOT(onSelectMesh(bool)));
   connect(ActionGroup,      SIGNAL(buttonClicked(int)),            SLOT(onActionClicked(int)));
 
+  connect(SpinBox_X,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Y,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_Z,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DX,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DY,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox_DZ,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  //To Connect preview check box
+  connectPreviewControl();
+
   ConstructorsClicked(0);
   SelectionIntoArgument();
   onActionClicked(MOVE_ELEMS_BUTTON);
@@ -363,6 +378,9 @@ void SMESHGUI_SymmetryDlg::Init (bool ResetControls)
 
     ActionGroup->button( MOVE_ELEMS_BUTTON )->setChecked(true);
     CheckBoxMesh->setChecked(false);
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
+
 //     MakeGroupsCheck->setChecked(false);
 //     MakeGroupsCheck->setEnabled(false);
     onSelectMesh(false);
@@ -434,6 +452,8 @@ void SMESHGUI_SymmetryDlg::ConstructorsClicked (int constructorId)
 
   connect(mySelectionMgr, SIGNAL(currentSelectionChanged()), this, SLOT(SelectionIntoArgument()));
 
+  onDisplaySimulation(true);
+
   QApplication::instance()->processEvents();
   updateGeometry();
   resize(100,100);
@@ -461,17 +481,8 @@ bool SMESHGUI_SymmetryDlg::ClickOnApply()
       anElementsId[i] = aListElementsId[i].toInt();
 
     SMESH::AxisStruct aMirror;
-
-    aMirror.x =  SpinBox_X->GetValue();
-    aMirror.y =  SpinBox_Y->GetValue();
-    aMirror.z =  SpinBox_Z->GetValue();
-    if (GetConstructorId() == 0) {
-      aMirror.vx = aMirror.vy = aMirror.vz = 0;
-    } else {
-      aMirror.vx = SpinBox_DX->GetValue();
-      aMirror.vy = SpinBox_DY->GetValue();
-      aMirror.vz = SpinBox_DZ->GetValue();
-    }
+    SMESH::SMESH_MeshEditor::MirrorType aMirrorType;
+    getMirror(aMirror,aMirrorType);
 
     QStringList aParameters;
     aParameters << SpinBox_X->text();
@@ -481,15 +492,6 @@ bool SMESHGUI_SymmetryDlg::ClickOnApply()
     aParameters << ( GetConstructorId() == 0 ? QString::number(0) : SpinBox_DY->text() );
     aParameters << ( GetConstructorId() == 0 ? QString::number(0) : SpinBox_DZ->text() );
 
-    SMESH::SMESH_MeshEditor::MirrorType aMirrorType;
-
-    if (GetConstructorId() == 0)
-      aMirrorType = SMESH::SMESH_MeshEditor::POINT;
-    if (GetConstructorId() == 1)
-      aMirrorType = SMESH::SMESH_MeshEditor::AXIS;
-    if (GetConstructorId() == 2)
-      aMirrorType = SMESH::SMESH_MeshEditor::PLANE;
-
     int actionButton = ActionGroup->checkedId();
     bool makeGroups = ( MakeGroupsCheck->isEnabled() && MakeGroupsCheck->isChecked() );
 
@@ -825,6 +827,7 @@ void SMESHGUI_SymmetryDlg::SelectionIntoArgument()
     buttonOk->setEnabled(true);
     buttonApply->setEnabled(true);
   }
+  onDisplaySimulation(true);
 }
 
 //=================================================================================
@@ -965,6 +968,7 @@ void SMESHGUI_SymmetryDlg::onSelectMesh (bool toSelectMesh)
     LineEditElements->setReadOnly(false);
     LineEditElements->setValidator(myIdValidator);
     onTextChange(LineEditElements->text());
+    hidePreview();
   }
 
   SelectionIntoArgument();
@@ -1129,3 +1133,67 @@ bool SMESHGUI_SymmetryDlg::isValid()
   }
   return true;
 }
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_SymmetryDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {
+    if ( myNbOkElements && isValid() && IsMirrorOk() ) {
+      QStringList aListElementsId = myElementsId.split(" ", QString::SkipEmptyParts);      
+      SMESH::long_array_var anElementsId = new SMESH::long_array;
+
+      anElementsId->length(aListElementsId.count());
+      for (int i = 0; i < aListElementsId.count(); i++)
+	anElementsId[i] = aListElementsId[i].toInt();
+
+      SMESH::AxisStruct aMirror;
+      SMESH::SMESH_MeshEditor::MirrorType aMirrorType;
+      
+      getMirror(aMirror,aMirrorType);
+
+      try {
+	bool copy = ActionGroup->checkedId() == COPY_ELEMS_BUTTON;
+	SUIT_OverrideCursor aWaitCursor;
+	SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+        if(CheckBoxMesh->isChecked())
+          aMeshEditor->MirrorObject(mySelectedObject, aMirror, aMirrorType, copy );
+        else
+          aMeshEditor->Mirror(anElementsId, aMirror, aMirrorType, copy );
+	
+        SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+        mySimulation->SetData(aMeshPreviewStruct._retn());
+      } catch (...) {
+	hidePreview();
+      }
+    } else {
+      hidePreview();
+    } 
+  } else {
+    hidePreview();
+  }
+}
+
+//=================================================================================
+// function : getMirror
+// purpose  : return mirror parameters
+//=================================================================================
+void SMESHGUI_SymmetryDlg::getMirror(SMESH::AxisStruct& theMirror, SMESH::SMESH_MeshEditor::MirrorType& theMirrorType) {
+  theMirror.x =  SpinBox_X->GetValue();
+  theMirror.y =  SpinBox_Y->GetValue();
+  theMirror.z =  SpinBox_Z->GetValue();
+  if (GetConstructorId() == 0) {
+    theMirror.vx = theMirror.vy = theMirror.vz = 0;
+  } else {
+    theMirror.vx = SpinBox_DX->GetValue();
+    theMirror.vy = SpinBox_DY->GetValue();
+    theMirror.vz = SpinBox_DZ->GetValue();
+  }
+  if (GetConstructorId() == 0)
+    theMirrorType = SMESH::SMESH_MeshEditor::POINT;
+  if (GetConstructorId() == 1)
+    theMirrorType = SMESH::SMESH_MeshEditor::AXIS;
+  if (GetConstructorId() == 2)
+    theMirrorType = SMESH::SMESH_MeshEditor::PLANE;
+}
diff --git a/src/SMESHGUI/SMESHGUI_SymmetryDlg.h b/src/SMESHGUI/SMESHGUI_SymmetryDlg.h
index 0d1655074..3e737c69b 100644
--- a/src/SMESHGUI/SMESHGUI_SymmetryDlg.h
+++ b/src/SMESHGUI/SMESHGUI_SymmetryDlg.h
@@ -29,13 +29,12 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
-
-// Qt includes
-#include <QDialog>
+#include "SMESHGUI_PreviewDlg.h"
 
 // IDL includes
 #include <SALOMEconfig.h>
 #include CORBA_SERVER_HEADER(SMESH_Mesh)
+#include CORBA_SERVER_HEADER(SMESH_MeshEditor)
 
 class QButtonGroup;
 class QGroupBox;
@@ -57,7 +56,7 @@ class SMESH_LogicalFilter;
 // class    : SMESHGUI_SymmetryDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_SymmetryDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_SymmetryDlg : public SMESHGUI_PreviewDlg
 { 
   Q_OBJECT
 
@@ -75,9 +74,10 @@ private:
   bool                   IsMirrorOk();
   void                   setNewMeshName();
 
+  void                   getMirror(SMESH::AxisStruct& theMirror, SMESH::SMESH_MeshEditor::MirrorType& aMirrorType);
+
   bool                   isValid();
 
-  SMESHGUI*              mySMESHGUI;              /* Current SMESHGUI object */
   SMESHGUI_IdValidator*  myIdValidator;
   LightApp_SelectionMgr* mySelectionMgr;          /* User shape selection */
   int                    myNbOkElements;          /* to check when elements are defined */
@@ -136,6 +136,9 @@ private:
    
   QPushButton*           myFilterBtn;
   SMESHGUI_FilterDlg*    myFilterDlg;
+
+protected slots:
+  virtual void           onDisplaySimulation( bool );
    
 private slots:
   void                   ConstructorsClicked( int );
diff --git a/src/SMESHGUI/SMESHGUI_TranslationDlg.cxx b/src/SMESHGUI/SMESHGUI_TranslationDlg.cxx
index 601550ecb..4ceb446a9 100644
--- a/src/SMESHGUI/SMESHGUI_TranslationDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_TranslationDlg.cxx
@@ -33,6 +33,7 @@
 #include "SMESHGUI_MeshUtils.h"
 #include "SMESHGUI_IdValidator.h"
 #include "SMESHGUI_FilterDlg.h"
+#include "SMESHGUI_MeshEditPreview.h"
 
 #include <SMESH_Actor.h>
 #include <SMESH_TypeFilter.hxx>
@@ -109,12 +110,11 @@ private:
 // class    : SMESHGUI_TranslationDlg()
 // purpose  :
 //=================================================================================
-SMESHGUI_TranslationDlg::SMESHGUI_TranslationDlg( SMESHGUI* theModule )
-  : QDialog( SMESH::GetDesktop( theModule ) ),
-    mySMESHGUI( theModule ),
-    mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
-    myFilterDlg(0),
-    mySelectedObject(SMESH::SMESH_IDSource::_nil())
+SMESHGUI_TranslationDlg::SMESHGUI_TranslationDlg( SMESHGUI* theModule ) : 
+  SMESHGUI_PreviewDlg( theModule ),
+  mySelectionMgr( SMESH::GetSelectionMgr( theModule ) ),
+  myFilterDlg(0),
+  mySelectedObject(SMESH::SMESH_IDSource::_nil())
 {
   QPixmap image0 (SMESH::GetResourceMgr( mySMESHGUI )->loadPixmap("SMESH", tr("ICON_SMESH_TRANSLATION_POINTS")));
   QPixmap image1 (SMESH::GetResourceMgr( mySMESHGUI )->loadPixmap("SMESH", tr("ICON_SMESH_TRANSLATION_VECTOR")));
@@ -215,6 +215,9 @@ SMESHGUI_TranslationDlg::SMESHGUI_TranslationDlg( SMESHGUI* theModule )
   // Name of a mesh to create
   LineEditNewMesh = new QLineEdit(GroupArguments);
 
+  //Preview check box
+  myPreviewCheckBox = new QCheckBox(tr("PREVIEW"), GroupArguments);
+
   // layout
   GroupArgumentsLayout->addWidget(TextLabelElements,    0, 0);
   GroupArgumentsLayout->addWidget(SelectElementsButton, 0, 1);
@@ -240,6 +243,7 @@ SMESHGUI_TranslationDlg::SMESHGUI_TranslationDlg( SMESHGUI* theModule )
   GroupArgumentsLayout->addWidget(ActionBox,            4, 0, 3, 4);
   GroupArgumentsLayout->addWidget(MakeGroupsCheck,      5, 5, 1, 4);
   GroupArgumentsLayout->addWidget(LineEditNewMesh,      6, 5, 1, 4);
+  GroupArgumentsLayout->addWidget(myPreviewCheckBox,    7, 0);
 
   /***************************************************************/
   GroupButtons = new QGroupBox(this);
@@ -318,6 +322,19 @@ SMESHGUI_TranslationDlg::SMESHGUI_TranslationDlg( SMESHGUI* theModule )
   connect(CheckBoxMesh,     SIGNAL(toggled(bool)),                  SLOT(onSelectMesh(bool)));
   connect(ActionGroup,      SIGNAL(buttonClicked(int)),             SLOT(onActionClicked(int)));
 
+  connect(SpinBox1_1,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox1_2,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox1_3,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  connect(SpinBox2_1,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox2_2,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox2_3,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+  connect(SpinBox2_3,  SIGNAL(valueChanged(double)), this, SLOT(toDisplaySimulation()));
+
+  
+  //To Connect preview check box
+  connectPreviewControl();
+
   ConstructorsClicked(0);
   SelectionIntoArgument();
   onActionClicked(MOVE_ELEMS_BUTTON);
@@ -367,6 +384,8 @@ void SMESHGUI_TranslationDlg::Init (bool ResetControls)
     CheckBoxMesh->setChecked(false);
 //     MakeGroupsCheck->setChecked(false);
 //     MakeGroupsCheck->setEnabled(false);
+    myPreviewCheckBox->setChecked(false);
+    onDisplaySimulation(false);
     onSelectMesh(false);
   }
 }
@@ -433,6 +452,8 @@ void SMESHGUI_TranslationDlg::ConstructorsClicked (int constructorId)
 
   connect(mySelectionMgr, SIGNAL(currentSelectionChanged()), this, SLOT(SelectionIntoArgument()));
 
+  onDisplaySimulation(true);
+
   QApplication::instance()->processEvents();
   updateGeometry();
   resize(100,100);
@@ -805,6 +826,7 @@ void SMESHGUI_TranslationDlg::SelectionIntoArgument()
     buttonOk->setEnabled(true);
     buttonApply->setEnabled(true);
   }
+  onDisplaySimulation(true);
 }
 
 //=================================================================================
@@ -818,7 +840,7 @@ void SMESHGUI_TranslationDlg::SetEditCurrentArgument()
   disconnect(mySelectionMgr, 0, this, 0);
   mySelectionMgr->clearSelected();
   mySelectionMgr->clearFilters();
-
+  
   if (send == SelectElementsButton) {
     myEditCurrentArgument = (QWidget*)LineEditElements;
     SMESH::SetPointRepresentation(false);
@@ -947,6 +969,7 @@ void SMESHGUI_TranslationDlg::onSelectMesh (bool toSelectMesh)
     LineEditElements->setReadOnly(false);
     LineEditElements->setValidator(myIdValidator);
     onTextChange(LineEditElements->text());
+    hidePreview();
   }
 
   SelectionIntoArgument();
@@ -1080,3 +1103,53 @@ bool SMESHGUI_TranslationDlg::isValid()
   }
   return true;
 }
+
+//=================================================================================
+// function : onDisplaySimulation
+// purpose  : Show/Hide preview
+//=================================================================================
+void SMESHGUI_TranslationDlg::onDisplaySimulation( bool toDisplayPreview ) {
+  if (myPreviewCheckBox->isChecked() && toDisplayPreview) {
+    
+    if (isValid() && myNbOkElements) {
+      QStringList aListElementsId = myElementsId.split(" ", QString::SkipEmptyParts);
+      
+      SMESH::long_array_var anElementsId = new SMESH::long_array;
+
+      anElementsId->length(aListElementsId.count());
+      for (int i = 0; i < aListElementsId.count(); i++)
+	anElementsId[i] = aListElementsId[i].toInt();
+
+      SMESH::DirStruct aVector;
+      if (GetConstructorId() == 0) {
+	aVector.PS.x = SpinBox2_1->GetValue() - SpinBox1_1->GetValue();
+	aVector.PS.y = SpinBox2_2->GetValue() - SpinBox1_2->GetValue();
+	aVector.PS.z = SpinBox2_3->GetValue() - SpinBox1_3->GetValue();
+      } else if (GetConstructorId() == 1) {
+	aVector.PS.x = SpinBox1_1->GetValue();
+	aVector.PS.y = SpinBox1_2->GetValue();
+	aVector.PS.z = SpinBox1_3->GetValue();
+      }
+
+      try {
+	bool copy = ActionGroup->checkedId() == COPY_ELEMS_BUTTON;
+	SUIT_OverrideCursor aWaitCursor;
+	SMESH::SMESH_MeshEditor_var aMeshEditor = myMesh->GetMeshEditPreviewer();
+	if(CheckBoxMesh->isChecked())
+	  aMeshEditor->TranslateObject(mySelectedObject, aVector, copy);
+	else
+	  aMeshEditor->Translate(anElementsId, aVector, copy);
+	
+        SMESH::MeshPreviewStruct_var aMeshPreviewStruct = aMeshEditor->GetPreviewData();
+        mySimulation->SetData(aMeshPreviewStruct._retn());	
+      } catch (...) {
+	
+      }
+    }
+    else {
+      hidePreview();
+    }
+  } else {
+    hidePreview();
+  }
+}
diff --git a/src/SMESHGUI/SMESHGUI_TranslationDlg.h b/src/SMESHGUI/SMESHGUI_TranslationDlg.h
index 477bf900a..60274c9eb 100644
--- a/src/SMESHGUI/SMESHGUI_TranslationDlg.h
+++ b/src/SMESHGUI/SMESHGUI_TranslationDlg.h
@@ -29,9 +29,7 @@
 
 // SMESH includes
 #include "SMESH_SMESHGUI.hxx"
-
-// Qt includes
-#include <QDialog>
+#include "SMESHGUI_PreviewDlg.h"
 
 // IDL includes
 #include <SALOMEconfig.h>
@@ -57,7 +55,7 @@ class SMESH_LogicalFilter;
 // class    : SMESHGUI_TranslationDlg
 // purpose  :
 //=================================================================================
-class SMESHGUI_EXPORT SMESHGUI_TranslationDlg : public QDialog
+class SMESHGUI_EXPORT SMESHGUI_TranslationDlg : public SMESHGUI_PreviewDlg
 { 
   Q_OBJECT
 
@@ -76,7 +74,6 @@ private:
 
   bool                   isValid();
 
-  SMESHGUI*              mySMESHGUI;              /* Current SMESHGUI object */
   SMESHGUI_IdValidator*  myIdValidator;
   LightApp_SelectionMgr* mySelectionMgr;          /* User shape selection */
   QString                myElementsId;
@@ -133,6 +130,9 @@ private:
 
   QPushButton*           myFilterBtn;
   SMESHGUI_FilterDlg*    myFilterDlg;
+
+protected slots:
+  virtual void              onDisplaySimulation( bool );
    
 private slots:
   void                   ConstructorsClicked( int );
diff --git a/src/SMESH_I/SMESH_MeshEditor_i.cxx b/src/SMESH_I/SMESH_MeshEditor_i.cxx
index 9723c64dd..4ce4b901e 100644
--- a/src/SMESH_I/SMESH_MeshEditor_i.cxx
+++ b/src/SMESH_I/SMESH_MeshEditor_i.cxx
@@ -1808,16 +1808,30 @@ SMESH_MeshEditor_i::extrusionSweep(const SMESH::long_array & theIDsOfElements,
 #ifdef NO_CAS_CATCH
     OCC_CATCH_SIGNALS;
 #endif
-    TIDSortedElemSet elements;
+    TIDSortedElemSet elements, copyElements;
     arrayToSet(theIDsOfElements, GetMeshDS(), elements, theElementType);
 
     const SMESH::PointStruct * P = &theStepVector.PS;
     gp_Vec stepVec( P->x, P->y, P->z );
 
+    TIDSortedElemSet* workElements = & elements;
+    TPreviewMesh      tmpMesh( SMDSAbs_Face );
+    SMESH_Mesh*       mesh = 0;
+    
+    if ( myPreviewMode ) {
+      SMDSAbs_ElementType select = SMDSAbs_All, avoid = SMDSAbs_Volume;
+      tmpMesh.Copy( elements, copyElements, select, avoid );
+      mesh = &tmpMesh;
+      workElements = & copyElements;
+    }
+    else {
+	mesh = myMesh;
+    }
+
     TElemOfElemListMap aHystory;
-    ::SMESH_MeshEditor anEditor( myMesh );
+    ::SMESH_MeshEditor anEditor( mesh );
     ::SMESH_MeshEditor::PGroupIDs groupIds =
-        anEditor.ExtrusionSweep (elements, stepVec, theNbOfSteps, aHystory, theMakeGroups);
+        anEditor.ExtrusionSweep (*workElements, stepVec, theNbOfSteps, aHystory, theMakeGroups);
 
     myMesh->GetMeshDS()->Modified();
     storeResult(anEditor);
@@ -2214,10 +2228,26 @@ SMESH_MeshEditor_i::extrusionAlongPathX(const SMESH::long_array &  IDsOfElements
     return EmptyGr;
   }
 
-  TIDSortedElemSet elements;
+  TIDSortedElemSet elements, copyElements;
   arrayToSet(IDsOfElements, GetMeshDS(), elements, ElementType);
 
-  ::SMESH_MeshEditor anEditor( myMesh );
+  TIDSortedElemSet* workElements = &elements;
+  TPreviewMesh      tmpMesh( SMDSAbs_Face );
+  SMESH_Mesh*       mesh = 0;
+
+  if ( myPreviewMode )
+  {
+    SMDSAbs_ElementType select = SMDSAbs_All, avoid = SMDSAbs_Volume;
+    tmpMesh.Copy( elements, copyElements, select, avoid );
+    mesh = &tmpMesh;
+    workElements = & copyElements;
+  }
+  else
+  {
+    mesh = myMesh;
+  }
+
+  ::SMESH_MeshEditor anEditor( mesh );
   ::SMESH_MeshEditor::Extrusion_Error error;
 
   SMESH_Mesh_i* aMeshImp = SMESH::DownCast<SMESH_Mesh_i*>( Path );
@@ -2229,7 +2259,7 @@ SMESH_MeshEditor_i::extrusionAlongPathX(const SMESH::long_array &  IDsOfElements
       Error = SMESH::SMESH_MeshEditor::EXTR_BAD_STARTING_NODE;
       return EmptyGr;
     }
-    error = anEditor.ExtrusionAlongTrack( elements, &(aMeshImp->GetImpl()), aNodeStart,
+    error = anEditor.ExtrusionAlongTrack( *workElements, &(aMeshImp->GetImpl()), aNodeStart,
                                           HasAngles, angles, LinearVariation,
                                           HasRefPoint, refPnt, MakeGroups );
     myMesh->GetMeshDS()->Modified();
@@ -2248,7 +2278,7 @@ SMESH_MeshEditor_i::extrusionAlongPathX(const SMESH::long_array &  IDsOfElements
       }
       SMESH_subMesh* aSubMesh =
         aMeshImp->GetImpl().GetSubMeshContaining(aSubMeshImp->GetId());
-      error = anEditor.ExtrusionAlongTrack( elements, aSubMesh, aNodeStart,
+      error = anEditor.ExtrusionAlongTrack( *workElements, aSubMesh, aNodeStart,
                                             HasAngles, angles, LinearVariation,
                                             HasRefPoint, refPnt, MakeGroups );
       myMesh->GetMeshDS()->Modified();
@@ -2881,11 +2911,28 @@ SMESH_MeshEditor_i::mirror(TIDSortedElemSet &                  theElements,
     aTrsf.SetMirror( gp_Ax2( P, V ));
   }
 
-  ::SMESH_MeshEditor anEditor( myMesh );
+  TIDSortedElemSet copyElements;
+  TPreviewMesh      tmpMesh;
+  TIDSortedElemSet* workElements = 0;
+  SMESH_Mesh*       mesh = 0;
+
+  if ( myPreviewMode )
+  {
+    tmpMesh.Copy( theElements, copyElements);
+    mesh = &tmpMesh;
+    workElements = & copyElements;
+  }
+  else
+  {
+    mesh = myMesh;
+    workElements = & theElements;
+  }
+
+  ::SMESH_MeshEditor anEditor( mesh );
   ::SMESH_MeshEditor::PGroupIDs groupIds =
-      anEditor.Transform (theElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
+      anEditor.Transform (*workElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
 
-  if(theCopy)
+  if(theCopy || myPreviewMode)
     storeResult(anEditor);
   else
     {
@@ -2940,7 +2987,10 @@ void SMESH_MeshEditor_i::MirrorObject(SMESH::SMESH_IDSource_ptr           theObj
                   << theCopy   << " )";
   }
   TIDSortedElemSet elements;
-  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, /*emptyIfIsMesh=*/1))
+
+  bool emptyIfIsMesh = myPreviewMode ? false : true;
+
+  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, emptyIfIsMesh))
     mirror(elements, theAxis, theMirrorType, theCopy, false);
 }
 
@@ -3112,11 +3162,28 @@ SMESH_MeshEditor_i::translate(TIDSortedElemSet        & theElements,
   const SMESH::PointStruct * P = &theVector.PS;
   aTrsf.SetTranslation( gp_Vec( P->x, P->y, P->z ));
 
-  ::SMESH_MeshEditor anEditor( myMesh );
+  TIDSortedElemSet copyElements;
+  TPreviewMesh      tmpMesh;
+  TIDSortedElemSet* workElements = 0;
+  SMESH_Mesh*       mesh = 0;
+
+  if ( myPreviewMode )
+  {
+    tmpMesh.Copy( theElements, copyElements);
+    mesh = &tmpMesh;
+    workElements = & copyElements;
+  }
+  else
+  {
+    mesh = myMesh;
+    workElements = & theElements;
+  }
+
+  ::SMESH_MeshEditor anEditor( mesh );
   ::SMESH_MeshEditor::PGroupIDs groupIds =
-      anEditor.Transform (theElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
+      anEditor.Transform (*workElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
 
-  if(theCopy)
+  if(theCopy || myPreviewMode)
     storeResult(anEditor);
   else
     {
@@ -3165,7 +3232,10 @@ void SMESH_MeshEditor_i::TranslateObject(SMESH::SMESH_IDSource_ptr theObject,
                   << theCopy << " )";
   }
   TIDSortedElemSet elements;
-  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, /*emptyIfIsMesh=*/1))
+
+  bool emptyIfIsMesh = myPreviewMode ? false : true;
+  
+  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, emptyIfIsMesh))
     translate(elements, theVector, theCopy, false);
 }
 
@@ -3330,11 +3400,27 @@ SMESH_MeshEditor_i::rotate(TIDSortedElemSet &        theElements,
   gp_Trsf aTrsf;
   aTrsf.SetRotation( gp_Ax1( P, V ), theAngle);
 
-  ::SMESH_MeshEditor anEditor( myMesh );
+  TIDSortedElemSet copyElements;
+  TPreviewMesh      tmpMesh;
+  TIDSortedElemSet* workElements = 0;
+  SMESH_Mesh*       mesh = 0;
+
+  if ( myPreviewMode ) {
+    tmpMesh.Copy( theElements, copyElements );
+    mesh = &tmpMesh;
+    workElements = &copyElements;
+  }
+  else
+  {
+    mesh = myMesh;
+    workElements=&theElements;
+  }
+
+  ::SMESH_MeshEditor anEditor( mesh );
   ::SMESH_MeshEditor::PGroupIDs groupIds =
-      anEditor.Transform (theElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
+      anEditor.Transform (*workElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
 
-  if(theCopy)
+  if(theCopy || myPreviewMode)
     storeResult(anEditor);
   else
     {
@@ -3388,7 +3474,8 @@ void SMESH_MeshEditor_i::RotateObject(SMESH::SMESH_IDSource_ptr theObject,
                   << theCopy << " )";
   }
   TIDSortedElemSet elements;
-  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, /*emptyIfIsMesh=*/1))
+  bool emptyIfIsMesh = myPreviewMode ? false : true;
+  if (idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, emptyIfIsMesh))
     rotate(elements,theAxis,theAngle,theCopy,false);
 }
 
@@ -3563,7 +3650,8 @@ SMESH_MeshEditor_i::scale(SMESH::SMESH_IDSource_ptr  theObject,
     THROW_SALOME_CORBA_EXCEPTION("Invalid nb of scale factors : 2", SALOME::BAD_PARAM);
 
   TIDSortedElemSet elements;
-  if ( !idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, /*emptyIfIsMesh=*/true))
+  bool emptyIfIsMesh = myPreviewMode ? false : true;
+  if ( !idSourceToSet(theObject, GetMeshDS(), elements, SMDSAbs_All, emptyIfIsMesh))
     return 0;
 
   vector<double> S(3);
@@ -3576,11 +3664,28 @@ SMESH_MeshEditor_i::scale(SMESH::SMESH_IDSource_ptr  theObject,
                    0,    S[1], 0,    thePoint.y * (1-S[1]),
                    0,    0,    S[2], thePoint.z * (1-S[2]),   tol, tol);
 
-  ::SMESH_MeshEditor anEditor( myMesh );
+  TIDSortedElemSet copyElements;
+  TPreviewMesh      tmpMesh;
+  TIDSortedElemSet* workElements = 0;
+  SMESH_Mesh*       mesh = 0;
+  
+  if ( myPreviewMode )
+  {
+    tmpMesh.Copy( elements, copyElements);
+    mesh = &tmpMesh;
+    workElements = & copyElements;
+  }
+  else
+  {
+    mesh = myMesh;
+    workElements = & elements;
+  }
+
+  ::SMESH_MeshEditor anEditor( mesh );
   ::SMESH_MeshEditor::PGroupIDs groupIds =
-      anEditor.Transform (elements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
+      anEditor.Transform (*workElements, aTrsf, theCopy, theMakeGroups, theTargetMesh);
 
-  if(theCopy)
+  if(theCopy || myPreviewMode )
     storeResult(anEditor);
   else
     {