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OCC functionality moving out from the widget
[modules/hydro.git] / src / HYDROCurveCreator / CurveCreator_Widget.cxx
index 441d059ee710fbb37d5281b4993b2c9d96f2d64b..e3bc69f8a29671b7bbd81446ea3d818a4f7cfa39 100644 (file)
@@ -25,8 +25,8 @@
 //#include "CurveCreator_NewPointDlg.h"
 #include "CurveCreator_NewSectionDlg.h"
 #include "CurveCreator_Utils.h"
-
-#include <GEOMUtils.hxx>
+#include "CurveCreator_UtilsICurve.hxx"
+#include "CurveCreator_TableView.h"
 
 #include <SUIT_Session.h>
 #include <SUIT_Desktop.h>
 #include <OCCViewer_ViewWindow.h>
 #include <OCCViewer_ViewManager.h>
 #include <OCCViewer_ViewPort3d.h>
+#include "OCCViewer_Utilities.h"
 
 #include <BRep_Tool.hxx>
 #include <TopoDS.hxx>
+#include <TopoDS_Vertex.hxx>
+#include <TopoDS_Wire.hxx>
+#include <TopoDS_Edge.hxx>
 #include <gp_Lin.hxx>
 #include <gp_Dir.hxx>
+#include <TopExp_Explorer.hxx>
+
+#include <GeomAPI_ProjectPointOnCurve.hxx>
 
 #include <AIS_ListOfInteractive.hxx>
 #include <AIS_ListIteratorOfListOfInteractive.hxx>
@@ -48,6 +55,8 @@
 #include <AIS_Point.hxx>
 #include <AIS_Line.hxx>
 #include <Geom_Point.hxx>
+#include <Geom_BSplineCurve.hxx>
+#include <Geom_Line.hxx>
 #include <StdSelect_BRepOwner.hxx>
 
 #include <QHBoxLayout>
 #include <QTableWidget>
 
 const double LOCAL_SELECTION_TOLERANCE = 0.0001;
-const int POINT_INDEX_COLUMN_WIDTH = 50;
+const int SECTION_NAME_COLUMN_WIDTH = 75;
+const int POINT_INDEX_COLUMN_WIDTH = 40;
+
+const int SCENE_PIXEL_TOLERANCE = 10;
 
 CurveCreator_Widget::CurveCreator_Widget(QWidget* parent,
                                          CurveCreator_ICurve *theCurve,
                                          Qt::WindowFlags fl)
-: QWidget(parent), myNewSectionEditor(NULL), myCurve(theCurve), mySection(0), myDragStarted( false ),
+: QWidget(parent), myNewSectionEditor(NULL), myCurve(theCurve), mySection(0),
+  myDragStarted( false ), myDragInteractionStyle( SUIT_ViewModel::STANDARD ),
   myOCCViewer( 0 )
 {
   myNewSectionEditor = new CurveCreator_NewSectionDlg( this );
@@ -86,15 +99,17 @@ CurveCreator_Widget::CurveCreator_Widget(QWidget* parent,
   connect( mySectionView, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(onContextMenu(QPoint)) );
 
   myLocalPointView = new QTableWidget();
+  myLocalPointView->setItemDelegate( new CurveCreator_TableItemDelegate( myLocalPointView ) );
   myLocalPointView->setVisible( false );
-  myLocalPointView->setColumnCount( 3 );
-  myLocalPointView->setColumnWidth( 0, POINT_INDEX_COLUMN_WIDTH );
+  myLocalPointView->setColumnCount( 4 );
+  myLocalPointView->setColumnWidth( 0, SECTION_NAME_COLUMN_WIDTH );
+  myLocalPointView->setColumnWidth( 1, POINT_INDEX_COLUMN_WIDTH );
   QStringList aLabels;
-  //aLabels << tr( "IDENTIFIER_LABEL" ) << tr( "X_POSITION_LBL" ) << tr( "Y_POSITION_LBL" );
-  aLabels << tr( "id" ) << tr( "X" ) << tr( "Y" );
+  //aLabels << tr( "SECTION_LABEL" ) << tr( "IDENTIFIER_LABEL" ) << tr( "X_POSITION_LBL" ) << tr( "Y_POSITION_LBL" );
+  aLabels << tr( "Section" ) << "Index" << tr( "X" ) << tr( "Y" );
   myLocalPointView->setHorizontalHeaderLabels( aLabels );
   connect( myLocalPointView, SIGNAL( cellChanged( int, int ) ),
-           this, SLOT( onLocalPointChanged( int, int ) ) );
+           this, SLOT( onCellChanged( int, int ) ) );
 
   QToolBar* aTB = new QToolBar(tr("TOOL_BAR_TLT"), aSectionGroup);
 //    QToolButton* anUndoBtn = new QToolButton(aTB);
@@ -173,21 +188,22 @@ CurveCreator_Widget::CurveCreator_Widget(QWidget* parent,
                         QKeySequence(Qt::ControlModifier|Qt::Key_Delete ) );
   connect(anAct, SIGNAL(triggered()), this, SLOT(onRemove()) );
   aTB->addAction(anAct);
-  aTB->addSeparator();
+  // TODO join
+  //aTB->addSeparator();
 
-  anAct = createAction( JOIN_ID, tr("JOIN"), aJoinPixmap, tr("JOIN_TLT"), 
-                        QKeySequence(Qt::ControlModifier|Qt::Key_Plus ) );
-  connect( anAct, SIGNAL(triggered()), this, SLOT(onJoin()) );
-  aTB->addAction(anAct);
-  aTB->addSeparator();
+  //anAct = createAction( JOIN_ID, tr("JOIN"), aJoinPixmap, tr("JOIN_TLT"), 
+  //                      QKeySequence(Qt::ControlModifier|Qt::Key_Plus ) );
+  //connect( anAct, SIGNAL(triggered()), this, SLOT(onJoin()) );
+  //aTB->addAction(anAct);
 
   anAct = createAction( CLEAR_ALL_ID, tr("CLEAR_ALL"), QPixmap(), tr("CLEAR_ALL_TLT"), 
                         QKeySequence(Qt::ControlModifier | Qt::ShiftModifier | Qt::Key_Delete ) );
   connect( anAct, SIGNAL(triggered()), this, SLOT( onClearAll()) );
 
-  anAct = createAction( JOIN_ALL_ID, tr("JOIN_ALL"), QPixmap(), tr("JOIN_ALL_TLT"), 
-                        QKeySequence(Qt::ControlModifier | Qt::ShiftModifier | Qt::Key_Plus ) );
-  connect( anAct, SIGNAL(triggered()), this, SLOT(onJoinAll()) );
+  // TODO join
+  //anAct = createAction( JOIN_ALL_ID, tr("JOIN_ALL"), QPixmap(), tr("JOIN_ALL_TLT"), 
+  //                      QKeySequence(Qt::ControlModifier | Qt::ShiftModifier | Qt::Key_Plus ) );
+  //connect( anAct, SIGNAL(triggered()), this, SLOT(onJoinAll()) );
 
   QVBoxLayout* aSectLayout = new QVBoxLayout();
   aSectLayout->setMargin( 5 );
@@ -210,6 +226,9 @@ CurveCreator_Widget::CurveCreator_Widget(QWidget* parent,
  */
 void CurveCreator_Widget::setOCCViewer( OCCViewer_Viewer* theViewer )
 {
+  if ( myOCCViewer == theViewer )
+    return;
+
   if ( myOCCViewer ) {
     OCCViewer_ViewManager* aViewManager = dynamic_cast<OCCViewer_ViewManager*>
                                                     ( myOCCViewer->getViewManager() );
@@ -219,13 +238,16 @@ void CurveCreator_Widget::setOCCViewer( OCCViewer_Viewer* theViewer )
            this, SLOT( onMouseRelease( SUIT_ViewWindow*, QMouseEvent* ) ) );
     disconnect( aViewManager, SIGNAL( mouseMove( SUIT_ViewWindow*, QMouseEvent* ) ),
            this, SLOT( onMouseMove( SUIT_ViewWindow*, QMouseEvent* ) ) );
+    disconnect( aViewManager, SIGNAL( lastViewClosed( SUIT_ViewManager* ) ),
+           this, SLOT( onLastViewClosed( SUIT_ViewManager* ) ) );
+    // restore normal mode in the viewer
+    OCCViewer_Utilities::setViewer2DMode( myOCCViewer, OCCViewer_ViewWindow::No2dMode );
+    // all local contexts should be closed if the viewer is not more used
+    setLocalPointContext( false, true );
   }
 
   myOCCViewer = theViewer;
   if ( myOCCViewer ) {
-    //OCCViewer_ViewWindow* aWnd = dynamic_cast<OCCViewer_ViewWindow*>(myOCCViewer->getViewManager()->getActiveView());
-    //if ( aWnd )
-    //  aWnd->installEventFilter( this );
     OCCViewer_ViewManager* aViewManager = dynamic_cast<OCCViewer_ViewManager*>
                                                     ( myOCCViewer->getViewManager() );
     connect( aViewManager, SIGNAL( mousePress( SUIT_ViewWindow*, QMouseEvent* ) ),
@@ -234,6 +256,9 @@ void CurveCreator_Widget::setOCCViewer( OCCViewer_Viewer* theViewer )
            this, SLOT( onMouseRelease( SUIT_ViewWindow*, QMouseEvent* ) ) );
     connect( aViewManager, SIGNAL( mouseMove( SUIT_ViewWindow*, QMouseEvent* ) ),
            this, SLOT( onMouseMove( SUIT_ViewWindow*, QMouseEvent* ) ) );
+    connect( aViewManager, SIGNAL( lastViewClosed( SUIT_ViewManager* ) ),
+           this, SLOT( onLastViewClosed( SUIT_ViewManager* ) ) );
+    OCCViewer_Utilities::setViewer2DMode( myOCCViewer, OCCViewer_ViewWindow::XYPlane );
   }
 }
 
@@ -245,26 +270,68 @@ OCCViewer_Viewer* CurveCreator_Widget::getOCCViewer()
   return myOCCViewer;
 }
 
-/*!
-  \brief Customize event handling
-  \param watched event receiver object
-  \param e event
-  \return \c true if the event processing should be stopped
-*/
-/*bool CurveCreator_Widget::eventFilter( QObject* theWatched, QEvent* theEvent )
+/**
+ * Returns OCC viewer context
+ */
+Handle(AIS_InteractiveContext) CurveCreator_Widget::getAISContext()
+{
+  Handle(AIS_InteractiveContext) aContext;
+  OCCViewer_Viewer* aViewer = getOCCViewer();
+  if ( aViewer )
+    aContext = aViewer->getAISContext();
+
+  return aContext;
+}
+
+/**
+ * Returns OCC viewer view port
+ */
+OCCViewer_ViewPort3d* CurveCreator_Widget::getViewPort()
+{
+  OCCViewer_ViewPort3d* aViewPort = 0;
+  OCCViewer_Viewer* aViewer = getOCCViewer();
+  if ( aViewer )
+    aViewPort = ((OCCViewer_ViewWindow*)aViewer->getViewManager()->getActiveView())->getViewPort();
+    
+  return aViewPort;
+}
+
+/**
+ * Set interaction style in the OCC viewer
+ * \param theStyle a new style
+ * \return the previous style
+ */
+int CurveCreator_Widget::changeInteractionStyle( int theStyle )
 {
   OCCViewer_Viewer* aViewer = getOCCViewer();
   if ( !aViewer )
-    return;
-  Handle(AIS_InteractiveContext) aContext = aViewer->getAISContext();
-  bool isLocalContext = aContext->HasOpenedContext();
-  if ( !isLocalContext )
-    return QWidget::eventFilter( theWatched, theEvent );
+    return -1;
 
-  bool isProcessed = true;
+  int aPrevStyle = aViewer->interactionStyle();
+  aViewer->setInteractionStyle( theStyle );
 
-  return isProcessed;
-}*/
+  return aPrevStyle;
+}
+
+/**
+ * Set interaction style in the OCC viewer
+ * \param theStyle a new style
+ * \return the previous style
+ */
+void CurveCreator_Widget::setObjectsSelected(const AIS_ListOfInteractive& theList)
+{
+  OCCViewer_Viewer* aViewer = getOCCViewer();
+  if ( aViewer )
+    aViewer->setObjectsSelected(theList);
+}
+
+//=======================================================================
+// function: reset
+// purpose: reset the widget viewer, close local context, clear selection
+//=======================================================================
+void CurveCreator_Widget::reset()
+{
+}
 
 //=======================================================================
 // function: getUniqSectionName
@@ -299,7 +366,9 @@ void CurveCreator_Widget::onSelectionChanged()
 {
   QList<ActionId> anEnabledAct;
   if( myCurve ){
-    anEnabledAct << NEW_SECTION_ID;
+    anEnabledAct << NEW_SECTION_ID << MODIFICATION_MODE_ID;
+    if ( removeEnabled() )
+      anEnabledAct << REMOVE_ID;
     QList<int> aSelSections = mySectionView->getSelectedSections();
     QList< QPair< int, int > > aSelPoints = mySectionView->getSelectedPoints();
     CurveCreator_TreeView::SelectionType aSelType = mySectionView->getSelectionType();
@@ -312,8 +381,7 @@ void CurveCreator_Widget::onSelectionChanged()
         anEnabledAct << UP_ID;
       }*/
       if( aSelSections.size() == 1 ){
-        anEnabledAct << ADDITION_MODE_ID << MODIFICATION_MODE_ID << DETECTION_MODE_ID;
-        anEnabledAct << REMOVE_ID;
+        anEnabledAct << ADDITION_MODE_ID << DETECTION_MODE_ID;
       }
       switch ( getActionMode() ) {
         case AdditionMode: {
@@ -331,11 +399,12 @@ void CurveCreator_Widget::onSelectionChanged()
           int aSectCnt = myCurve->getNbSections();
           if( aSectCnt > 0 )
             anEnabledAct << CLEAR_ALL_ID;
-          if( aSectCnt > 1 )
-            anEnabledAct << JOIN_ALL_ID;
-          if( aSelSections.size() > 1 ){
-            anEnabledAct << JOIN_ID;
-          }
+          // TODO
+          //if( aSectCnt > 1 )
+          //  anEnabledAct << JOIN_ALL_ID;
+          //if( aSelSections.size() > 1 ){
+          //  anEnabledAct << JOIN_ID;
+          //}
         }
         break;
         case DetectionMode: {
@@ -374,9 +443,10 @@ void CurveCreator_Widget::onSelectionChanged()
     if( (myCurve->getNbSections() + myCurve->getNbPoints()) > 0 ){
       anEnabledAct << REMOVE_ALL_ID;
     }*/
-    if( myCurve->getNbSections() > 1 ){
-      anEnabledAct << JOIN_ALL_ID;
-    }
+    // TODO
+    //if( myCurve->getNbSections() > 1 ){
+    //  anEnabledAct << JOIN_ALL_ID;
+    //}
   }
   QList<ActionId> anIds = myActionMap.keys();
   for( int i = 0 ; i < anIds.size() ; i++ ){
@@ -389,31 +459,18 @@ void CurveCreator_Widget::onSelectionChanged()
       }
     }
   }
+  updateUndoRedo();
   emit selectionChanged();
 }
 
 void CurveCreator_Widget::onAdditionMode(bool checked)
 {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if( !myCurve || !aViewer )
+  if (!checked)
     return;
 
-  Handle(AIS_InteractiveContext) aContext = aViewer->getAISContext();
-  OCCViewer_ViewManager* aViewManager = dynamic_cast<OCCViewer_ViewManager*>
-                                                    (aViewer->getViewManager());
-//  if ( aViewManager->getType() == OCCViewer_Viewer::Type() ) {
-  if( aViewer ) {
-    if (checked) {
-/*      myGuiState = aViewWindow->saveState();
-      aViewer->enableMultiselection(false);
-      aViewer->enableSelection(false);*/
-    } else {
-/*      aViewer->enableMultiselection(true);
-      aViewer->enableSelection(true);
-      aViewWindow->restoreState( myGuiState );*/
-      return;
-    }
-  }
+  Handle(AIS_InteractiveContext) aContext = getAISContext();
+  if( !myCurve || aContext.IsNull() )
+    return;
 
   mySection= -1;
   myPointNum = -1;
@@ -434,7 +491,6 @@ void CurveCreator_Widget::onAdditionMode(bool checked)
 void CurveCreator_Widget::onModificationMode(bool checked)
 {
   myLocalPointView->setVisible( checked );
-  setLocalPointContext( true );
 }
 
 void CurveCreator_Widget::onDetectionMode(bool checked)
@@ -443,23 +499,26 @@ void CurveCreator_Widget::onDetectionMode(bool checked)
 
 void CurveCreator_Widget::onModeChanged(bool checked)
 {
-  setLocalPointContext( false );
+  ActionMode aMode = NoneMode;
   if (checked) {
     QAction* anAction = (QAction*)sender();
     switch(myActionMap.key(anAction)) {
       case ADDITION_MODE_ID:
+        aMode = AdditionMode;
         if (myActionMap[MODIFICATION_MODE_ID]->isChecked())
           myActionMap[MODIFICATION_MODE_ID]->trigger();
         else if (myActionMap[DETECTION_MODE_ID]->isChecked())
           myActionMap[DETECTION_MODE_ID]->trigger();
         break;
       case MODIFICATION_MODE_ID:
+        aMode = ModificationMode;
         if (myActionMap[ADDITION_MODE_ID]->isChecked())
           myActionMap[ADDITION_MODE_ID]->trigger();
         else if (myActionMap[DETECTION_MODE_ID]->isChecked())
           myActionMap[DETECTION_MODE_ID]->trigger();
         break;
       case DETECTION_MODE_ID:
+        aMode = DetectionMode;
         if (myActionMap[ADDITION_MODE_ID]->isChecked())
           myActionMap[ADDITION_MODE_ID]->trigger();
         else if (myActionMap[MODIFICATION_MODE_ID]->isChecked())
@@ -468,15 +527,23 @@ void CurveCreator_Widget::onModeChanged(bool checked)
     }
   }
   onSelectionChanged();
+  setLocalPointContext( aMode == ModificationMode, true );
 }
 
 void CurveCreator_Widget::onAddNewPoint(const CurveCreator::Coordinates& theCoords)
 {
   if( !myCurve )
     return;
-  myCurve->addPoints(theCoords, mySection, myPointNum );
-  mySectionView->pointsAdded( mySection, myPointNum );
-  myPointNum++;
+  //myCurve->addPoints(theCoords, mySection, myPointNum );
+  //mySectionView->pointsAdded( mySection, myPointNum );
+  //myPointNum++;
+  QList<int> aSections = mySectionView->getSelectedSections();
+  if( aSections.size() == 0 ){
+    return;
+  }
+  int aSection = aSections[0];
+  myCurve->addPoints(theCoords, aSection); // add to the end of section
+  mySectionView->pointsAdded( aSection, myCurve->getNbPoints( aSection ) );
   onSelectionChanged();
   updateUndoRedo();
 }
@@ -567,9 +634,14 @@ void CurveCreator_Widget::onModifySection()
   bool isClosed = myNewSectionEditor->isClosed();
   CurveCreator::SectionType aSectType = myNewSectionEditor->getSectionType();
 //  myCurve->startOperation();
-  myCurve->setClosed( isClosed, mySection );
-  myCurve->setSectionName( mySection , aName.toStdString() );
-  myCurve->setSectionType( mySection, aSectType );
+  if( myCurve->getSectionName(mySection) != aName.toStdString() )
+    myCurve->setSectionName( mySection , aName.toStdString() );
+
+  if( myCurve->getSectionType(mySection) != aSectType )
+    myCurve->setSectionType( mySection, aSectType );
+
+  if( myCurve->isClosed(mySection) != isClosed )
+    myCurve->setClosed( mySection, isClosed );
 //  myCurve->finishOperation();
   mySectionView->sectionChanged(mySection);
   updateUndoRedo();
@@ -702,7 +774,7 @@ void CurveCreator_Widget::onCloseSections()
 //  myCurve->startOperation();
   QList<int> aSelSections = mySectionView->getSelectedSections();
   for( int i = 0 ; i < aSelSections.size() ; i++ ){
-    myCurve->setClosed(true, aSelSections[i]);
+    myCurve->setClosed(aSelSections[i], true);
     mySectionView->sectionChanged(aSelSections[i]);
   }
 //  myCurve->finishOperation();
@@ -716,7 +788,7 @@ void CurveCreator_Widget::onUncloseSections()
 //  myCurve->startOperation();
   QList<int> aSelSections = mySectionView->getSelectedSections();
   for( int i = 0 ; i < aSelSections.size() ; i++ ){
-    myCurve->setClosed(false, aSelSections[i]);
+    myCurve->setClosed(aSelSections[i], false);
     mySectionView->sectionChanged(aSelSections[i]);
   }
 //  myCurve->finishOperation();
@@ -727,40 +799,47 @@ void CurveCreator_Widget::onUndo()
 {
     if( !myCurve )
       return;
+
+    CurveCreator_ICurve::SectionToPointList aPoints;
+    startCurveModification( aPoints, false );
     myCurve->undo();
+    finishCurveModification();
     mySectionView->reset();
-    updateUndoRedo();
 }
 
 void CurveCreator_Widget::onRedo()
 {
     if( !myCurve )
       return;
+    CurveCreator_ICurve::SectionToPointList aPoints;
+    startCurveModification( aPoints, false );
     myCurve->redo();
+    finishCurveModification();
     mySectionView->reset();
-    updateUndoRedo();
 }
 
 void CurveCreator_Widget::updateUndoRedo()
 {
-    QAction* anAct = myActionMap[UNDO_ID];
-    if( anAct != 0 ){
-        if( myCurve->getNbUndo() != 0 ){
-            anAct->setEnabled(true);
-        }
-        else{
-            anAct->setDisabled(true);
-        }
+  if( !myCurve )
+    return;
+  QAction* anAct = myActionMap[UNDO_ID];
+  if( anAct != 0 ){
+    if( myCurve->getNbUndo() != 0 ){
+      anAct->setEnabled(true);
     }
-    anAct = myActionMap[REDO_ID];
-    if( anAct != 0 ){
-        if( myCurve->getNbRedo() != 0 ){
-            anAct->setEnabled(true);
-        }
-        else{
-            anAct->setDisabled(true);
-        }
+    else{
+      anAct->setDisabled(true);
+    }
+  }
+  anAct = myActionMap[REDO_ID];
+  if( anAct != 0 ){
+    if( myCurve->getNbRedo() != 0 ){
+      anAct->setEnabled(true);
     }
+    else{
+      anAct->setDisabled(true);
+    }
+  }
 }
 
 void CurveCreator_Widget::onContextMenu( QPoint thePoint )
@@ -812,6 +891,30 @@ QList< QPair< int, int > > CurveCreator_Widget::getSelectedPoints()
   return mySectionView->getSelectedPoints();
 }
 
+/**
+ * According to the widget state, performs the remove action
+ */
+void CurveCreator_Widget::removeSelected()
+{
+  onRemove();
+}
+
+/**
+ * Checks whether there are some selection to be removed
+ */
+bool CurveCreator_Widget::removeEnabled()
+{
+  bool isEnabled = getActionMode() == ModificationMode;
+  if ( !isEnabled ) {
+    QList<int> aSelSections = mySectionView->getSelectedSections();
+    CurveCreator_TreeView::SelectionType aSelType = mySectionView->getSelectionType();
+    isEnabled = aSelType == CurveCreator_TreeView::ST_SECTIONS &&
+                aSelSections.size() == 1;
+  }
+  return isEnabled;
+}
+
+
 //=================================================================================
 // function : GeometryGUI::onGetCoordsByClick()
 // purpose  : Manage mouse press events in Additon mode
@@ -822,10 +925,9 @@ void CurveCreator_Widget::onGetCoordsByClick( QMouseEvent* pe )
     return;
 
   if ( pe->modifiers() != Qt::ControlModifier ) {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
-    return;
-    Handle(AIS_InteractiveContext) ic = aViewer->getAISContext();
+    Handle(AIS_InteractiveContext) ic = getAISContext();
+    if ( ic.IsNull() )
+      return;
 
     gp_Pnt aPnt;    
 
@@ -845,9 +947,8 @@ void CurveCreator_Widget::onGetCoordsByClick( QMouseEvent* pe )
       aPnt = BRep_Tool::Pnt( TopoDS::Vertex( ic->SelectedShape() ) );
     else*/
     {
-      OCCViewer_ViewPort3d* vp =
-        ((OCCViewer_ViewWindow*)aViewer->getViewManager()->getActiveView())->getViewPort();
-      aPnt = GEOMUtils::ConvertClickToPoint( pe->x(), pe->y(), vp->getView() );
+      OCCViewer_ViewPort3d* vp = getViewPort();
+      aPnt = CurveCreator_Utils::ConvertClickToPoint( pe->x(), pe->y(), vp->getView() );
     }
     // set the coordinates into dialog
     CurveCreator::Coordinates aCoords;
@@ -861,10 +962,11 @@ void CurveCreator_Widget::onGetCoordsByClick( QMouseEvent* pe )
   }
 }
 
-//=================================================================================
-// function : CurveCreator_Widget::onMousePress()
-// purpose  : Manage mouse press events in Modification mode
-//=================================================================================
+/**
+ * Manage mouse press events
+ * \param theWindow an owner of the signal
+ * \param theEvent a mouse event
+ */
 void CurveCreator_Widget::onMousePress( SUIT_ViewWindow*, QMouseEvent* theEvent )
 {
   if ( theEvent->button() != Qt::LeftButton )
@@ -885,123 +987,95 @@ void CurveCreator_Widget::onMousePress( SUIT_ViewWindow*, QMouseEvent* theEvent
   }
 }
 
-//=================================================================================
-// function : HYDROGUI_PolylineOp::onMouseRelease()
-// purpose  : Manage mouse press events in Modification mode
-//=================================================================================
+/**
+ * Manage mouse release events in Modification mode
+ * \param theWindow an owner of the signal
+ * \param theEvent a mouse event
+ */
 void CurveCreator_Widget::onMouseRelease( SUIT_ViewWindow*, QMouseEvent* theEvent )
 {
-  if ( getActionMode() != ModificationMode || !myDragStarted )
+  if ( getActionMode() != ModificationMode )
     return;
 
-  setDragStarted( false );
-  //store initial cursor position for Drag&Drop
-  //QPoint aPos = theEvent->pos();
-  //if (pe->button() == Qt::LeftButton)
-  //  myDragStartPosition = pe->pos();
-
-  QPoint aPos = theEvent->pos();
-  // check whether the segment is clicked an a new point should be added to the segment
-  if ( insertPointToSelectedSegment( aPos.x(), aPos.y() ) ) {
-    setSelectedPonts( 0 );
-    updateUndoRedo();
+  if ( myDragStarted ) {
+    bool isDragged = myDragged;
+    CurveCreator_ICurve::SectionToPointList aDraggedPoints;
+    if ( myDragged )
+      aDraggedPoints = myDragPoints;
+
+    setDragStarted( false );
+    // if the drag of some points has happened, restore the drag selection
+    if ( aDraggedPoints.size() > 0 )
+      setSelectedPonts( aDraggedPoints );
   }
+  else // check whether the segment is clicked an a new point should be added to the segment
+    insertPointToSelectedSegment( theEvent->pos().x(), theEvent->pos().y() );
 
   // updates the input panel table to show the selected point coordinates
   updateLocalPointView();
 }
 
-//=================================================================================
-// function : GeometryGUI::onMouseMove()
-// purpose  : Manage mouse move events in Modification mode
-//=================================================================================
+/**
+ * Manage mouse move events in Modification mode
+ * \param theWindow an owner of the signal
+ * \param theEvent a mouse event
+ */
 void CurveCreator_Widget::onMouseMove( SUIT_ViewWindow*, QMouseEvent* theEvent )
 {
   if ( getActionMode() != ModificationMode || !myDragStarted )
     return;
 
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
-    return;
-
-  //if ( !(pe->buttons() & Qt::LeftButton) )
-  //  return;
   QPoint aPos = theEvent->pos();
   if ( (aPos - myDragStartPosition).manhattanLength() < QApplication::startDragDistance() )
     return;
 
-  //setLocalPointContext( false );
-  OCCViewer_ViewWindow* aWindow =
-           (OCCViewer_ViewWindow*)aViewer->getViewManager()->getActiveView();
-  gp_Pnt aStartPnt = GEOMUtils::ConvertClickToPoint( myDragStartPosition.x(), myDragStartPosition.y(),
-                                                     aWindow->getViewPort()->getView() );
-  gp_Pnt anEndPnt = GEOMUtils::ConvertClickToPoint( aPos.x(), aPos.y(),
-                                                    aWindow->getViewPort()->getView() );
-  double aXDelta = aStartPnt.X() - anEndPnt.X();
-  double anYDelta = aStartPnt.Y() - anEndPnt.Y();
+  moveSelectedPoints( aPos.x(), aPos.y() );
+  myDragStartPosition = aPos;
+}
 
-  int aSectionId = 0;
-  int aPointId;
-  std::deque<float> aChangedPos;
-  for ( int i = 0, aNb = myDragPoints.size(); i < aNb; i++ ) {
-    aPointId = myDragPoints[i];
-    aChangedPos = myCurve->getPoint( aSectionId, aPointId );
-    if ( aChangedPos.size() < 2 )
-      continue;
-    aChangedPos[0] = aChangedPos[0] - aXDelta;
-    aChangedPos[1] = aChangedPos[1] - anYDelta;
-    myCurve->setPoint( aSectionId, aPointId, aChangedPos );
-  }
+/**
+ * Set zero viewer by the last view closed in
+ * \param theManager a viewer manager
+ */
+void CurveCreator_Widget::onLastViewClosed( SUIT_ViewManager* theManager )
+{
+  myOCCViewer = 0;
+}
 
-  //setLocalPointContext( true );
-  setSelectedPonts( aSectionId, myDragPoints );
+void CurveCreator_Widget::onMousePress( QMouseEvent* theEvent )
+{
+  onMousePress( 0, theEvent );
+}
 
-  myDragStartPosition = aPos;
-  /*  
-  QDrag *drag = new QDrag(this);
-  QMimeData *mimeData = new QMimeData;
-  
-  mimeData->setData(mimeType, data);
-  drag->setMimeData(mimeData);
-  
-  Qt::DropAction dropAction = drag->exec(Qt::CopyAction | Qt::MoveAction);
-  */
+void CurveCreator_Widget::onMouseRelease( QMouseEvent* theEvent )
+{
+  onMouseRelease( 0, theEvent );
 }
 
-void CurveCreator_Widget::onLocalPointChanged( int theRow, int theColumn )
+void CurveCreator_Widget::onMouseMove( QMouseEvent* theEvent )
 {
-  QList<int> aSelSections = mySectionView->getSelectedSections();
-  if ( aSelSections.size() < 0 )
-    return;
+  onMouseMove( 0, theEvent );
+}
 
-  int aSection = aSelSections[0];
+void CurveCreator_Widget::onCellChanged( int theRow, int theColumn )
+{
+  int aCurrSect = getSectionId( theRow );
+  int aPntIndex = getPointId( theRow );
 
-  QList<int> aSelPoints;
-  getSelectedPonts( aSection, aSelPoints );
-  setLocalPointContext( false );
+  if ( aPntIndex < 0 )
+    return;
 
-  int aPntIndex = -1;
-  int aCurrSect=-1;
+  CurveCreator_ICurve::SectionToPointList aSelPoints;
+  startCurveModification( aSelPoints );
+
+  double aX  = myLocalPointView->item( theRow, 2 )->data( Qt::UserRole ).toDouble();
+  double anY = myLocalPointView->item( theRow, 3 )->data( Qt::UserRole ).toDouble();
   std::deque<float> aChangedPos;
-  float aPrevX, aPrevY, aX, anY;
-  //for( int i = 0 ; i < aSelSections.size() ; i++ ){
-    aCurrSect = aSection;//aSelSections[i];
-
-    aPrevX = myLocalPointView->item( theRow, 1 )->data( Qt::UserRole ).toDouble();
-    aPrevY = myLocalPointView->item( theRow, 2 )->data( Qt::UserRole ).toDouble();
-
-    aPntIndex = findLocalPointIndex( aCurrSect, aPrevX, aPrevY );
-    if ( aPntIndex >= 0 ) {
-      aX  = myLocalPointView->item( theRow, 1 )->text().toDouble();
-      anY = myLocalPointView->item( theRow, 2 )->text().toDouble();
-      aChangedPos.clear();
-      aChangedPos.push_back( aX );
-      aChangedPos.push_back( anY );
-      myCurve->setPoint( aCurrSect, aPntIndex, aChangedPos );
-    }
-  //}
-  setLocalPointContext( true );
-  setSelectedPonts( aSection, aSelPoints );
+  aChangedPos.push_back( aX );
+  aChangedPos.push_back( anY );
+  myCurve->setPoint( aCurrSect, aPntIndex, aChangedPos );
+
+  finishCurveModification( aSelPoints );
 }
 
 /**
@@ -1039,185 +1113,213 @@ void CurveCreator_Widget::removeSection()
  */
 void CurveCreator_Widget::removePoint()
 {
-  int aSectionId = 0;
-  QList<int> aPoints;
-  qSort( aPoints );
-  getSelectedPonts( aSectionId, aPoints );
+  CurveCreator_ICurve::SectionToPointList aPoints;
+  getSelectedPonts( aPoints );
+  if ( aPoints.size() == 0 )
+    return;
 
-  int aCurrSect=-1;
-  int aRemoveCnt = 0;
+  CurveCreator_ICurve::SectionToPointList aSelPoints;
+  startCurveModification( aSelPoints, false );
 
-  for( int i = aPoints.size()-1; i >= 0; i-- ){
-    int aPntIndx = aPoints[i];
-    myCurve->removePoint( aSectionId, aPntIndx );
-    mySectionView->pointsRemoved( aSectionId, aPntIndx );
-  }
+  myCurve->removeSeveralPoints( aPoints );
+  finishCurveModification( CurveCreator_ICurve::SectionToPointList() );
 }
 
-bool CurveCreator_Widget::insertPointToSelectedSegment( const int theX,
+void CurveCreator_Widget::insertPointToSelectedSegment( const int theX,
                                                         const int theY )
 {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
-    return false;
+  Handle(AIS_InteractiveContext) aContext = getAISContext();
 
-  int aPoint1 = -1, aPoint2 = -1;
+  OCCViewer_ViewPort3d* aViewPort = getViewPort();
+  Handle(V3d_View) aView;
+  if ( aViewPort )
+    aView = aViewPort->getView();
 
+  if ( aContext.IsNull() || aView.IsNull() )
+    return;
   gp_Pnt aPoint;
-  bool isFoundPoint = false;
-  Handle(AIS_InteractiveContext) aContext = aViewer->getAISContext();
-  for ( aContext->InitSelected(); aContext->MoreSelected() && !isFoundPoint;
-        aContext->NextSelected() ) {
-    TopoDS_Shape aTShape = aContext->SelectedShape();
-    if ( !aTShape.IsNull() && aTShape.ShapeType() == TopAbs_VERTEX )
-      continue;
-    else {
-      Handle(SelectMgr_EntityOwner) anOwner = aContext->SelectedOwner();
-      if ( anOwner.IsNull() )
-        continue;
-      const TopLoc_Location& aLocation = anOwner->Location();
-      Handle(AIS_InteractiveObject) anAIS = Handle(AIS_InteractiveObject)::DownCast( anOwner->Selectable() );
-      isFoundPoint = pointOnObject( anAIS, theX, theY, aPoint, aPoint1, aPoint2 );
+  gp_Pnt aPoint1, aPoint2;
+  bool isFoundPoint = CurveCreator_Utils::getNeighbourPoints( aContext, aView, theX, theY,
+                                                              aPoint, aPoint1, aPoint2 );
+  if ( !isFoundPoint )
+    return;
+
+  // insert the point to the model curve
+  CurveCreator_ICurve::SectionToPointList aSelPoints;
+  startCurveModification( aSelPoints );
+
+  CurveCreator::Coordinates aCoords;
+  aCoords.push_back( aPoint.X() );
+  aCoords.push_back( aPoint.Y() );
+
+  CurveCreator_ICurve::SectionToPointList aPoints1, aPoints2;
+  findSectionsToPoints( aPoint1.X(), aPoint1.Y(), aPoints1 );
+  findSectionsToPoints( aPoint2.X(), aPoint2.Y(), aPoints2 );
+  CurveCreator_ICurve::SectionToPointList::const_iterator anIt = aPoints1.begin(),
+                                                          aLast = aPoints1.end();
+  int aSectionId = -1;
+  // there can be a case when a new point is added into two sections
+  int aPoint1Id = -1, aPoint2Id = -1;
+  for ( ; anIt != aLast && aSectionId < 0; anIt++ ) {
+    int aSectionCur = anIt->first;
+    CurveCreator_ICurve::SectionToPointList::const_iterator anIt2 = aPoints2.begin(),
+                                                            aLast2 = aPoints2.end();
+    for ( ; anIt2 != aLast2 && aSectionId < 0; anIt2++ ) {
+      if ( anIt2->first == aSectionCur ) {
+        aSectionId = aSectionCur;
+        aPoint1Id = anIt->second;
+        aPoint2Id = anIt2->second;
+      }
     }
   }
-  // insert the point to the model curve
-  bool isDone = false;
-  if ( isFoundPoint && aPoint1 >= 0 && aPoint2 >= 0 ) {
-    int aSection = 0;
-    CurveCreator::Coordinates aCoords;
-    aCoords.push_back( aPoint.X() );
-    aCoords.push_back( aPoint.Y() );
 
-    int anInsertPos = aPoint1 < aPoint2 ? aPoint1 + 1 : aPoint2 + 1;
-    myCurve->addPoints( aCoords, aSection, anInsertPos );
-    mySectionView->pointsAdded( aSection, myCurve->getNbPoints( aSection ) );
+  int anInsertPos = -1;
+  int aLastPoint = myCurve->getNbPoints( aSectionId )-1; 
+  if ( ( aPoint1Id == aLastPoint && aPoint2Id == 0 ) ||
+       ( aPoint2Id == aLastPoint && aPoint1Id == 0 ) )
+    anInsertPos = -1; // if the section happens between first and last points
+  else
+    anInsertPos = aPoint1Id < aPoint2Id ? aPoint1Id + 1 : aPoint2Id + 1;
+
+  myCurve->addPoints( aCoords, aSectionId, anInsertPos );
+  mySectionView->pointsAdded( aSectionId, myCurve->getNbPoints( aSectionId ) );
+
+  finishCurveModification( aSelPoints );
 
-    isDone = true;
+  setSelectedPonts();
+}
+
+void CurveCreator_Widget::moveSelectedPoints( const int theXPosition,
+                                              const int theYPosition )
+{
+  OCCViewer_ViewPort3d* aViewPort = getViewPort();
+  if ( !aViewPort )
+    return;
+
+  CurveCreator_ICurve::SectionToPointList aPoints;
+  startCurveModification( aPoints, false );
+
+  gp_Pnt aStartPnt = CurveCreator_Utils::ConvertClickToPoint( myDragStartPosition.x(),
+                                                              myDragStartPosition.y(),
+                                                              aViewPort->getView() );
+  gp_Pnt anEndPnt = CurveCreator_Utils::ConvertClickToPoint( theXPosition, theYPosition,
+                                                             aViewPort->getView() );
+  double aXDelta = aStartPnt.X() - anEndPnt.X();
+  double anYDelta = aStartPnt.Y() - anEndPnt.Y();
+
+  CurveCreator_ICurve::SectionToPointCoordsList aCoordList;
+  std::deque<float> aChangedPos;
+  CurveCreator_ICurve::SectionToPointList::const_iterator anIt = myDragPoints.begin(),
+                                                          aLast = myDragPoints.end();
+  for ( ; anIt != aLast; anIt++ ) {
+    int aSectionId = anIt->first;
+    int aPointId = anIt->second;
+    aChangedPos = myCurve->getPoint( aSectionId, aPointId );
+    if ( aChangedPos.size() < 2 )
+      continue;
+    aChangedPos[0] = aChangedPos[0] - aXDelta;
+    aChangedPos[1] = aChangedPos[1] - anYDelta;
+    
+    aCoordList.push_back(
+      std::make_pair(std::make_pair( aSectionId, aPointId ), 
+                     aChangedPos ));
   }
-  return isDone;
+  myCurve->setSeveralPoints( aCoordList );
+
+  myDragged = true;
+  finishCurveModification( myDragPoints );
 }
 
 void CurveCreator_Widget::updateLocalPointView()
 {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
+  if ( myDragStarted )
+    return;
+  Handle(AIS_InteractiveContext) aContext = getAISContext();
+  if ( aContext.IsNull() )
     return;
-  Handle(AIS_InteractiveContext) aContext = aViewer->getAISContext();
+
+  std::list<float> aSelectedList = CurveCreator_Utils::getSelectedPoints( aContext );
+
+  std::list<float>::const_iterator anIt = aSelectedList.begin(), aLast = aSelectedList.end();
 
   bool isBlocked = myLocalPointView->blockSignals(true);
-  gp_Pnt aPnt;
   myLocalPointView->setRowCount( 0 );
-  for ( aContext->InitSelected(); aContext->MoreSelected(); aContext->NextSelected() ) {
-    TopoDS_Vertex aVertex;
-    TopoDS_Shape aShape = aContext->SelectedShape();
-    if ( !aShape.IsNull() && aShape.ShapeType() == TopAbs_VERTEX )
-      aVertex = TopoDS::Vertex( aContext->SelectedShape() );
-    else {
-      Handle(SelectMgr_EntityOwner) anOwner = aContext->SelectedOwner();
-      if ( !anOwner.IsNull() ) {
-        Handle(AIS_InteractiveObject) anAIS = Handle(AIS_InteractiveObject)::DownCast( anOwner->Selectable() );
-        if ( !anAIS.IsNull() ) {
-          Handle(AIS_Point) aPoint = Handle(AIS_Point)::DownCast( anAIS);
-          if ( !aPoint.IsNull() )
-            aVertex = TopoDS::Vertex( aPoint->Vertex() );
-        }
-        if ( aVertex.IsNull() ) {
-          // the following happens if there are no points in the current curve, there is only a shape
-          /*Handle(StdSelect_BRepOwner) aBrepOwner = Handle(StdSelect_BRepOwner)::DownCast(anOwner);
-          if ( aBrepOwner.IsNull() )
-            continue;
-          if ( aBrepOwner->HasShape() ) {
-            const TopoDS_Shape& aShape = aBrepOwner->Shape();
-            if ( !aShape.IsNull() && aShape.ShapeType() == TopAbs_VERTEX )
-            {
-              aVertex = TopoDS::Vertex( aShape );
-            }
-          }*/
-        }
-      }
-      if ( aVertex.IsNull() )
-        continue;
-      aPnt = BRep_Tool::Pnt( aVertex );
-      addLocalPointToTable( aPnt.X(), aPnt.Y() );
-    }
+  for ( ; anIt != aLast; anIt++ )
+  {
+    float aX = *anIt;
+    anIt++;
+    float anY = *anIt;
+    anIt++;
+    float aZ = *anIt;
+    addLocalPointToTable( aX, anY );
   }
   myLocalPointView->blockSignals(isBlocked);
 }
 
-void CurveCreator_Widget::setLocalPointContext( const bool theOpen )
+/**
+ * 
+ */
+void CurveCreator_Widget::setLocalPointContext( const bool theOpen, const bool isUpdateTable )
 {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
-    return;
-  Handle(AIS_InteractiveContext) ic = aViewer->getAISContext();
-
-  if ( theOpen ) {
-    // Open local context if there is no one
-    bool allObjects = true;
-    if ( !ic->HasOpenedContext() ) {
-      ic->ClearCurrents( false );
-      ic->OpenLocalContext( allObjects, true, true );
-    }
-    AIS_ListOfInteractive aList;
-    ic->DisplayedObjects( aList );
-    int aLSize = 0;
-    for ( AIS_ListIteratorOfListOfInteractive it( aList ); it.More(); it.Next() )
-      aLSize++;
-
-    int theMode = TopAbs_VERTEX;
-    for ( AIS_ListIteratorOfListOfInteractive it( aList ); it.More(); it.Next() )
-    {
-      Handle(AIS_InteractiveObject) anAIS = it.Value();
-      if ( !anAIS.IsNull() )
-      {
-        if ( anAIS->IsKind( STANDARD_TYPE( AIS_Shape ) ) )
-        {
-          ic->Load( anAIS, -1, false );
-          ic->Activate( anAIS, AIS_Shape::SelectionMode( (TopAbs_ShapeEnum)theMode ) );
-        }
-        else if ( anAIS->DynamicType() != STANDARD_TYPE(AIS_Trihedron) )
-        {
-          ic->Load( anAIS, -1, false );
-          ic->Activate( anAIS, theMode );
-        }
-      }
-      continue;
-    }
-  }
-  else {
-    ic->CloseAllContexts();
-  }
+  CurveCreator_Utils::setLocalPointContext( getAISContext(), theOpen );
+  if ( !theOpen && isUpdateTable )
+    updateLocalPointView();
 }
 
 void CurveCreator_Widget::addLocalPointToTable( const double theX, const double theY )
 {
+  CurveCreator_ICurve::SectionToPointList aPoints;
+  findSectionsToPoints( theX, theY, aPoints );
+
+  CurveCreator_ICurve::SectionToPointList aSkipList;
+  // table could not contain two equal value rows
   int aRowId = myLocalPointView->rowCount();
   double aCurrentX, aCurrentY;
+  int aSectionId, aPointId;
+  CurveCreator_ICurve::SectionToPoint aPoint;
   for ( int i = 0; i < aRowId; i++ ) {
-    aCurrentX = myLocalPointView->item( i, 1 )->data( Qt::UserRole ).toDouble();
-    aCurrentY = myLocalPointView->item( i, 2 )->data( Qt::UserRole ).toDouble();
+    aCurrentX = myLocalPointView->item( i, 2 )->data( Qt::UserRole ).toDouble();
+    aCurrentY = myLocalPointView->item( i, 3 )->data( Qt::UserRole ).toDouble();
     if ( fabs( aCurrentX - theX ) < LOCAL_SELECTION_TOLERANCE &&
-         fabs( aCurrentY - theY ) < LOCAL_SELECTION_TOLERANCE )
-      return;
+         fabs( aCurrentY - theY ) < LOCAL_SELECTION_TOLERANCE ) {
+           aPoint = std::make_pair<int, int>( getSectionId( i ), getPointId( i ) );
+      if ( !contains( aSkipList, aPoint ) )
+        aSkipList.push_back( aPoint );
+    }
   }
+  if ( aSkipList.size() == aPoints.size() )
+    return;
+
   QTableWidgetItem* anItem;
+  CurveCreator_ICurve::SectionToPointList::const_iterator anIt = aPoints.begin(),
+                                                          aLast = aPoints.end();
+  for ( ; anIt != aLast; anIt++ ) {
+    aPoint = *anIt;
+    if ( contains( aSkipList, aPoint ) )
+      continue;
 
-  myLocalPointView->setRowCount( aRowId+1 );
+    myLocalPointView->setRowCount( aRowId+1 );
+    aSectionId = aPoint.first;
+    aPointId = aPoint.second;
 
-  int aPointSection = 0;
-  int aPointIndex = findLocalPointIndex( aPointSection, theX, theY );
+    anItem = new QTableWidgetItem( myCurve->getSectionName( aSectionId ).c_str() );
+    anItem->setFlags( anItem->flags() & ~Qt::ItemIsEnabled );
+    anItem->setData( Qt::UserRole, aSectionId );
+    myLocalPointView->setItem( aRowId, 0, anItem );
 
-  anItem = new QTableWidgetItem( QString::number( aPointIndex + 1 ) );
-  anItem->setFlags( anItem->flags() & ~Qt::ItemIsEnabled );
-  myLocalPointView->setItem( aRowId, 0, anItem );
+    anItem = new QTableWidgetItem( QString::number( aPointId + 1 ) );
+    anItem->setFlags( anItem->flags() & ~Qt::ItemIsEnabled );
+    anItem->setData( Qt::UserRole, aPointId );
+    myLocalPointView->setItem( aRowId, 1, anItem );
 
-  anItem = new QTableWidgetItem( QString::number( theX ) );
-  anItem->setData( Qt::UserRole, theX );
-  myLocalPointView->setItem( aRowId, 1, anItem );
+    anItem = new QTableWidgetItem( QString::number( theX ) );
+    anItem->setData( Qt::UserRole, theX );
+    myLocalPointView->setItem( aRowId, 2, anItem );
 
-  anItem = new QTableWidgetItem( QString::number( theY ) );
-  anItem->setData( Qt::UserRole, theY );
-  myLocalPointView->setItem( aRowId, 2, anItem );
+    anItem = new QTableWidgetItem( QString::number( theY ) );
+    anItem->setData( Qt::UserRole, theY );
+    myLocalPointView->setItem( aRowId, 3, anItem );
+  }
 }
 
 /**
@@ -1227,67 +1329,127 @@ void CurveCreator_Widget::addLocalPointToTable( const double theX, const double
  */
 void CurveCreator_Widget::setDragStarted( const bool theState, const QPoint& thePoint )
 {
-  myDragStarted = theState;
-  if ( myDragStarted ) {
+  if ( theState ) {
+    getSelectedPonts( myDragPoints );
+    myDragStarted = myDragPoints.size();
     myDragStartPosition = thePoint;
-    getSelectedPonts( 0, myDragPoints );
+    if ( myDragStarted ) {
+      // change a viewer interaction style in order to avoid a select rectangle build
+      myDragInteractionStyle = changeInteractionStyle( SUIT_ViewModel::KEY_FREE );
+    }
   }
+  else {
+    if ( myDragStarted )
+      changeInteractionStyle( myDragInteractionStyle );
+    myDragStarted = false;
+    myDragPoints.clear();
+  }
+  myDragged = false;
 }
 
-void CurveCreator_Widget::getSelectedPonts( int theSectionId, QList<int>& thePoints )
+void CurveCreator_Widget::getSelectedPonts( CurveCreator_ICurve::SectionToPointList& thePoints )
 {
   thePoints.clear();
-
-  float aPrevX, aPrevY;
-  int aPntIndex;
-  for ( int i = 0, aNb = myLocalPointView->rowCount(); i < aNb; i++ ) {
-    aPrevX = myLocalPointView->item( i, 1 )->data( Qt::UserRole ).toDouble();
-    aPrevY = myLocalPointView->item( i, 2 )->data( Qt::UserRole ).toDouble();
-
-    aPntIndex = findLocalPointIndex( theSectionId, aPrevX, aPrevY );
-    if ( aPntIndex >= 0 )
-      thePoints.append( aPntIndex );
-  }
+  for ( int i = 0, aNb = myLocalPointView->rowCount(); i < aNb; i++ )
+    thePoints.push_back( std::make_pair( getSectionId( i ), getPointId( i ) ) );
 }
 
-void CurveCreator_Widget::setSelectedPonts( const int theSectionId, const QList<int>& thePoints )
+void CurveCreator_Widget::setSelectedPonts( const CurveCreator_ICurve::SectionToPointList& thePoints )
 {
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( !aViewer )
+  if ( myDragStarted )
+    return;
+  Handle(AIS_InteractiveContext) ic = getAISContext();
+  if ( ic.IsNull() || !ic->HasOpenedContext() )
     return;
 
   AIS_ListOfInteractive aListToSelect;
 
-  Handle(AIS_InteractiveContext) ic = aViewer->getAISContext();
-  if ( !ic->HasOpenedContext() )
-    return;
-
   AIS_ListOfInteractive aDisplayedList;
   ic->DisplayedObjects( aDisplayedList );
-  for ( AIS_ListIteratorOfListOfInteractive it( aDisplayedList ); it.More(); it.Next() )
-  {
-    Handle(AIS_InteractiveObject) anAIS = it.Value();
-    if ( anAIS.IsNull() )
-      continue;
-    Handle(AIS_Point) aPoint = Handle(AIS_Point)::DownCast( anAIS );
-    if ( aPoint.IsNull() )
-      continue;
 
-    TopoDS_Vertex aVertex = TopoDS::Vertex( aPoint->Vertex() );
+  CurveCreator_ICurve::SectionToPointList::const_iterator anIt = thePoints.begin(),
+                                                          aLast = thePoints.end();
+  CurveCreator_ICurve::SectionToPoint aSToPoint;
+  for( ; anIt != aLast; anIt++ ) {
+    aSToPoint = *anIt;
 
-    if ( aVertex.IsNull() )
-      continue;
+    for ( AIS_ListIteratorOfListOfInteractive it( aDisplayedList ); it.More(); it.Next() )
+    {
+      Handle(AIS_InteractiveObject) anAIS = it.Value();
+      if ( anAIS.IsNull() )
+        continue;
+      Handle(AIS_Point) anAISPoint = Handle(AIS_Point)::DownCast( anAIS );
+      if ( anAISPoint.IsNull() )
+        continue;
+
+      TopoDS_Vertex aVertex = TopoDS::Vertex( anAISPoint->Vertex() );
+
+      if ( aVertex.IsNull() )
+        continue;
+
+      gp_Pnt aPnt = BRep_Tool::Pnt( aVertex );
 
-    gp_Pnt aPnt = BRep_Tool::Pnt( aVertex );
-    int aPointIndex = findLocalPointIndex( theSectionId, aPnt.X(), aPnt.Y() );
-    if ( thePoints.contains( aPointIndex ) )
-      aListToSelect.Append( anAIS );
+      CurveCreator_ICurve::SectionToPointList aPoints;
+      findSectionsToPoints( aPnt.X(), aPnt.Y(), aPoints );
+
+      CurveCreator_ICurve::SectionToPointList::const_iterator anIt = aPoints.begin(),
+                                                              aLast = aPoints.end();
+      CurveCreator_ICurve::SectionToPoint aPoint;
+      for ( ; anIt != aLast; anIt++ ) {
+        aPoint = *anIt;
+        if ( aPoint.first == aSToPoint.first && aPoint.second == aSToPoint.second )
+          aListToSelect.Append( anAIS );
+      }
+    }
+  }
+  if ( thePoints.size() > 0 && aListToSelect.First() == aListToSelect.Last() ) {
+    /*TopExp_Explorer aExpF(myShape,TopAbs_FACE);
+    for (; aExpF.More(); aExpF.Next())
+    {
+        const TopoDS_Face& aFace = TopoDS::Face(aExpF.Current());
+    }*/
   }
 
-  aViewer->setObjectsSelected( aListToSelect );
+
+  ic->ClearSelected( Standard_False );
+  setObjectsSelected( aListToSelect );
   updateLocalPointView();
 }
 
+/**
+ * Get viewer information before perform the curve modification.
+ * Take a list of selected cuve points an close local context.
+ * The context should be closed because the curve presentation is
+ * redisplayed and if it is not closed, when we close the local context
+ * later, the presentation shown in the local context is disappeared.
+ * \param thePoints an output list of curve selected points
+ * \param theFillPoints a flag whether the selection list should be filled
+ */
+void CurveCreator_Widget::startCurveModification(
+                           CurveCreator_ICurve::SectionToPointList& thePoints,
+                           const bool theFillPoints )
+{
+  if ( theFillPoints ) {
+    thePoints.clear();
+    getSelectedPonts( thePoints );
+  }
+  setLocalPointContext( false );
+}
+
+/**
+ * Restore the viewer state after the curve modification is done.
+ * Open local context and select given points inside it.
+ * \param thePoints a list of curve selected points
+ */
+void CurveCreator_Widget::finishCurveModification(
+                           const CurveCreator_ICurve::SectionToPointList& thePoints )
+{
+  if ( getActionMode() == ModificationMode )
+    setLocalPointContext( true );
+  setSelectedPonts( thePoints );
+  updateUndoRedo();
+}
+
 /**
  * Returns a point index in the model curve by the point coordinates in the viewer
  * \param theX the X coordinate of the point
@@ -1295,78 +1457,46 @@ void CurveCreator_Widget::setSelectedPonts( const int theSectionId, const QList<
  */
 int CurveCreator_Widget::findLocalPointIndex( int theSectionId, float theX, float theY )
 {
-  int aPntIndex = -1;
+  return CurveCreator_UtilsICurve::findLocalPointIndex( myCurve, theSectionId, theX, theY );
+}
 
-  CurveCreator::Coordinates aCoords;
-  for ( int i = 0, aNb = myCurve->getNbPoints( theSectionId ); i < aNb && aPntIndex < 0; i++ ) {
-    aCoords = myCurve->getPoint( theSectionId, i );
-    if ( aCoords.size() < 2 )
-      continue;
-    if ( fabs( aCoords[0] - theX ) < LOCAL_SELECTION_TOLERANCE &&
-         fabs( aCoords[1] - theY ) < LOCAL_SELECTION_TOLERANCE )
-      aPntIndex = i;
-  }
+void CurveCreator_Widget::findSectionsToPoints( const double theX, const double theY,
+                                 CurveCreator_ICurve::SectionToPointList& thePoints )
+{
+  return CurveCreator_UtilsICurve::findSectionsToPoints( myCurve, theX, theY, thePoints );
+}
 
-  return aPntIndex;
+void CurveCreator_Widget::convert( const CurveCreator_ICurve::SectionToPointList& thePoints,
+                                   QMap<int, QList<int> >& theConvPoints )
+{
+  return CurveCreator_UtilsICurve::convert( thePoints, theConvPoints );
 }
 
 /**
- * Checks whether the point belongs to the OCC object
- * \param theObject a line or shape with a bspline inside
- * \param theX the X coordinate in the view.
- * \param theY the Y coordinate in the view.
- * \param thePoint the output point to be append to the model curve
- * \param thePoint1 the output point to bound the line where a new point should be inserted
- * \param thePoint2 the output point to bound the line where a new point should be inserted
+ * Returns a section index from the table
+ * \param theRowId a table row
  */
-bool CurveCreator_Widget::pointOnObject( Handle(AIS_InteractiveObject) theObject,
-                                         const int theX, const int theY,
-                                         gp_Pnt& thePoint,
-                                         int& thePoint1, int& thePoint2 )
+int CurveCreator_Widget::getSectionId( const int theRowId ) const
 {
-  bool isFound = false;
+  return myLocalPointView->item( theRowId, 0 )->data( Qt::UserRole ).toInt();
+}
 
-  OCCViewer_Viewer* aViewer = getOCCViewer();
-  if ( theObject.IsNull() || !aViewer )
-    return isFound;
-
-  OCCViewer_ViewWindow* aWindow =
-           (OCCViewer_ViewWindow*)aViewer->getViewManager()->getActiveView();
-  thePoint = GEOMUtils::ConvertClickToPoint( theX, theY,
-                                             aWindow->getViewPort()->getView() );
-
-  Handle(AIS_Line) aLine = Handle(AIS_Line)::DownCast( theObject );
-  if ( !aLine.IsNull() ) {
-    Handle(Geom_Point) aPStart;
-    Handle(Geom_Point) aPEnd;
-    aLine->Points( aPStart, aPEnd );
-
-    Standard_Real aStartX = aPStart->X(),
-                  aStartY = aPStart->Y(),
-                  aStartZ = aPStart->Z();
-    Standard_Real anEndX = aPEnd->X(),
-                  anEndY = aPEnd->Y(),
-                  anEndZ = aPEnd->Z();
-    // TODO: check whether the point belong to the selected line
-    gp_Lin aLin( gp_Pnt( aPStart->X(), aPStart->Y(), aPStart->Z() ),
-                gp_Dir( gp_Vec( gp_Pnt( aPStart->X(), aPStart->Y(), aPStart->Z() ),
-                                gp_Pnt( aPEnd->X(), aPEnd->Y(), aPEnd->Z() ) ) ) );
-    double aDistance = aLin.Distance( thePoint );
-
-
-    if ( aLin.Contains( thePoint, LOCAL_SELECTION_TOLERANCE ) ) {
-      // find the neighbour points
-      thePoint1 = findLocalPointIndex( 0, aPStart->X(), aPStart->Y() );
-      thePoint2 = findLocalPointIndex( 0, aPEnd->X(),   aPEnd->Y() );
-
-      isFound = thePoint1 >= 0 && thePoint2 >= 0;
-    }
-  }
-  else {
-    Handle(AIS_Shape) aShape = Handle(AIS_Shape)::DownCast( theObject );
-    if ( !aShape.IsNull() ) {
-      // find the neighbour points
-    }
-  }
-  return isFound;
+/**
+ * Returns a point index from the table
+ * \param theRowId a table row
+ */
+int CurveCreator_Widget::getPointId( const int theRowId ) const
+{
+  return myLocalPointView->item( theRowId, 1 )->data( Qt::UserRole ).toInt();
+}
+
+/**
+ * Returns whethe the container has the value
+ * \param theList a container of values
+ * \param theValue a value
+ */
+bool CurveCreator_Widget::contains( const CurveCreator_ICurve::SectionToPointList& theList,
+                                    const CurveCreator_ICurve::SectionToPoint& theValue ) const
+{
+  return CurveCreator_UtilsICurve::contains( theList, theValue );
 }