src/SMESHGUI/SMESHGUI_VTKUtils.cxx

   1 //  Copyright (C) 2007-2010  CEA/DEN, EDF R&D, OPEN CASCADE
   2 //
   3 //  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   4 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   5 //
   6 //  This library is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU Lesser General Public
   8 //  License as published by the Free Software Foundation; either
   9 //  version 2.1 of the License.
  10 //
  11 //  This library is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 //  Lesser General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU Lesser General Public
  17 //  License along with this library; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 //
  20 //  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  21 //
  22
  23 // SMESH SMESHGUI : GUI for SMESH component
  24 // File   : SMESHGUI_VTKUtils.cxx
  25 // Author : Open CASCADE S.A.S.
  26 // SMESH includes
  27 //
  28 #include "SMESHGUI_VTKUtils.h"
  29
  30 #include "SMESHGUI.h"
  31 #include "SMESHGUI_Utils.h"
  32 #include "SMESHGUI_Filter.h"
  33
  34 #include <SMESH_Actor.h>
  35 #include <SMESH_ActorUtils.h>
  36 #include <SMESH_ObjectDef.h>
  37 #include <SMDS_Mesh.hxx>
  38
  39 // SALOME GUI includes
  40 #include <SUIT_Desktop.h>
  41 #include <SUIT_Session.h>
  42 #include <SUIT_MessageBox.h>
  43 #include <SUIT_ViewManager.h>
  44 #include <SUIT_ResourceMgr.h>
  45
  46 #include <SALOME_ListIO.hxx>
  47 #include <SALOME_ListIteratorOfListIO.hxx>
  48
  49 #include <SVTK_Selector.h>
  50 #include <SVTK_ViewModel.h>
  51 #include <SVTK_ViewWindow.h>
  52
  53 #include <VTKViewer_Algorithm.h>
  54
  55 #include <LightApp_SelectionMgr.h>
  56 #include <SalomeApp_Application.h>
  57 #include <SalomeApp_Study.h>
  58
  59 // SALOME KERNEL includes
  60 #include <utilities.h>
  61
  62 // IDL includes
  63 #include <SALOMEconfig.h>
  64 #include CORBA_CLIENT_HEADER(SMESH_Mesh)
  65 #include CORBA_CLIENT_HEADER(SMESH_Group)
  66
  67 // VTK includes
  68 #include <vtkMath.h>
  69 #include <vtkRenderer.h>
  70 #include <vtkActorCollection.h>
  71 #include <vtkUnstructuredGrid.h>
  72
  73 // OCCT includes
  74 #include <TColStd_IndexedMapOfInteger.hxx>
  75 #include <Standard_ErrorHandler.hxx>
  76
  77 namespace SMESH
  78 {
  79   typedef std::map<TKeyOfVisualObj,TVisualObjPtr> TVisualObjCont;
  80   static TVisualObjCont VISUAL_OBJ_CONT;
  81
  82   //=============================================================================
  83   /*!
  84    * \brief Allocate some memory at construction and release it at destruction.
  85    * Is used to be able to continue working after mesh generation or visualization
  86    * break due to lack of memory
  87    */
  88   //=============================================================================
  89
  90   struct MemoryReserve
  91   {
  92     char* myBuf;
  93     MemoryReserve(): myBuf( new char[1024*1024*1] ){} // 1M
  94     void Free() { if (myBuf) { delete [] myBuf; myBuf = 0; }}
  95     ~MemoryReserve() { Free(); }
  96   };
  97   static MemoryReserve* theVISU_MemoryReserve = new MemoryReserve;
  98
  99   //================================================================================
 100   /*!
 101    * \brief Remove VisualObj and its actor from all views
 102    */
 103   //================================================================================
 104
 105   void RemoveVisualObjectWithActors( const char* theEntry )
 106   {
 107     SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>
 108       ( SUIT_Session::session()->activeApplication() );
 109     SUIT_ViewManager* aViewManager =
 110       app ? app->getViewManager(SVTK_Viewer::Type(), true) : 0;
 111     if ( aViewManager ) {
 112       QVector<SUIT_ViewWindow*> views = aViewManager->getViews();
 113       for ( int iV = 0; iV < views.count(); ++iV ) {
 114         if ( SMESH_Actor* actor = FindActorByEntry( views[iV], theEntry)) {
 115           if(SVTK_ViewWindow* vtkWnd = GetVtkViewWindow(views[iV]))
 116             vtkWnd->RemoveActor(actor);
 117           actor->Delete();
 118         }
 119       }
 120       int aStudyId = aViewManager->study()->id();
 121       TVisualObjCont::key_type aKey(aStudyId,theEntry);
 122       TVisualObjCont::iterator anIter = VISUAL_OBJ_CONT.find(aKey);
 123       if(anIter != VISUAL_OBJ_CONT.end()) {
 124         // for unknown reason, object destructor is not called, so clear object manually
 125         anIter->second->GetUnstructuredGrid()->SetCells(0,0,0);
 126         anIter->second->GetUnstructuredGrid()->SetPoints(0);
 127       }
 128       VISUAL_OBJ_CONT.erase(aKey);
 129     }
 130   }
 131   //================================================================================
 132   /*!
 133    * \brief Remove all VisualObjs and their actors from all views
 134    */
 135   //================================================================================
 136
 137   void RemoveAllObjectsWithActors()
 138   {
 139     SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>
 140       ( SUIT_Session::session()->activeApplication() );
 141     if (!app) return;
 142     ViewManagerList viewMgrs = app->viewManagers();
 143     for ( int iM = 0; iM < viewMgrs.count(); ++iM ) {
 144       SUIT_ViewManager* aViewManager = viewMgrs.at( iM );
 145       if ( aViewManager && aViewManager->getType() == SVTK_Viewer::Type()) {
 146         QVector<SUIT_ViewWindow*> views = aViewManager->getViews();
 147         for ( int iV = 0; iV < views.count(); ++iV ) {
 148           if(SVTK_ViewWindow* vtkWnd = GetVtkViewWindow(views[iV])) {
 149             vtkRenderer *aRenderer = vtkWnd->getRenderer();
 150             VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 151             vtkActorCollection *actors = aCopy.GetActors();
 152             for (int i = 0; i < actors->GetNumberOfItems(); ++i ) {
 153               // size of actors changes inside the loop
 154               if (SMESH_Actor *actor = dynamic_cast<SMESH_Actor*>(actors->GetItemAsObject(i)))
 155               {
 156                 vtkWnd->RemoveActor(actor);
 157                 actor->Delete();
 158               }
 159             }
 160           }
 161         }
 162       }
 163     }
 164     TVisualObjCont::iterator anIter = VISUAL_OBJ_CONT.begin();
 165     for ( ; anIter != VISUAL_OBJ_CONT.end(); ++anIter ) {
 166       // for unknown reason, object destructor is not called, so clear object manually
 167       anIter->second->GetUnstructuredGrid()->SetCells(0,0,0);
 168       anIter->second->GetUnstructuredGrid()->SetPoints(0);
 169     }
 170     VISUAL_OBJ_CONT.clear();
 171   }
 172
 173   //================================================================================
 174   /*!
 175    * \brief Remove all VisualObjs of a study
 176    */
 177   //================================================================================
 178
 179   void RemoveVisuData(int studyID)
 180   {
 181     SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>
 182       ( SUIT_Session::session()->activeApplication() );
 183     if (!app) return;
 184     ViewManagerList viewMgrs = app->viewManagers();
 185     for ( int iM = 0; iM < viewMgrs.count(); ++iM ) {
 186       SUIT_ViewManager* aViewManager = viewMgrs.at( iM );
 187       if ( aViewManager && aViewManager->getType() == SVTK_Viewer::Type() &&
 188            aViewManager->study()->id() == studyID ) {
 189         QVector<SUIT_ViewWindow*> views = aViewManager->getViews();
 190         for ( int iV = 0; iV < views.count(); ++iV ) {
 191           if(SVTK_ViewWindow* vtkWnd = GetVtkViewWindow(views[iV])) {
 192             vtkRenderer *aRenderer = vtkWnd->getRenderer();
 193             VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 194             vtkActorCollection *actors = aCopy.GetActors();
 195             for (int i = 0; i < actors->GetNumberOfItems(); ++i ) {
 196               // size of actors changes inside the loop
 197               if(SMESH_Actor *actor = dynamic_cast<SMESH_Actor*>(actors->GetItemAsObject(i)))
 198               {
 199                 vtkWnd->RemoveActor(actor);
 200                 actor->Delete();
 201               }
 202             }
 203           }
 204         }
 205       }
 206     }
 207     TVisualObjCont::iterator anIter = VISUAL_OBJ_CONT.begin();
 208     for ( ; anIter != VISUAL_OBJ_CONT.end(); ) {
 209       int curId = anIter->first.first;
 210       if ( curId == studyID ) {
 211         // for unknown reason, object destructor is not called, so clear object manually
 212         anIter->second->GetUnstructuredGrid()->SetCells(0,0,0);
 213         anIter->second->GetUnstructuredGrid()->SetPoints(0);
 214         VISUAL_OBJ_CONT.erase( anIter++ ); // anIter++ returns a copy of self before incrementing
 215       }
 216       else {
 217         anIter++;
 218       }
 219     }
 220   }
 221
 222   //================================================================================
 223   /*!
 224    * \brief Notify the user on problems during visualization
 225    */
 226   //================================================================================
 227
 228   void OnVisuException()
 229   {
 230     try {
 231 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 232       OCC_CATCH_SIGNALS;
 233 #endif
 234       // PAL16774 (Crash after display of many groups). Salome sometimes crashes just
 235       // after or at showing this message, so we do an additional check of available memory
 236 //       char* buf = new char[100*1024];
 237 //       delete [] buf;
 238       SUIT_MessageBox::warning(SMESHGUI::desktop(), QObject::tr("SMESH_WRN_WARNING"),
 239                                QObject::tr("SMESH_VISU_PROBLEM"));
 240     } catch (...) {
 241       // no more memory at all: last resort
 242       MESSAGE_BEGIN ( "SMESHGUI_VTKUtils::OnVisuException(), exception even at showing a message!!!" <<
 243                       std::endl << "Try to remove all visual data..." );
 244       if (theVISU_MemoryReserve) {
 245         delete theVISU_MemoryReserve;
 246         theVISU_MemoryReserve = 0;
 247       }
 248       RemoveAllObjectsWithActors();
 249       SUIT_MessageBox::warning(SMESHGUI::desktop(), QObject::tr("SMESH_WRN_WARNING"),
 250                                QObject::tr("SMESH_VISU_PROBLEM_CLEAR"));
 251       MESSAGE_END ( "...done" );
 252     }
 253   }
 254   //================================================================================
 255   /*!
 256    * \brief Returns an updated visual object
 257    */
 258   //================================================================================
 259
 260   TVisualObjPtr GetVisualObj(int theStudyId, const char* theEntry){
 261     TVisualObjPtr aVisualObj;
 262     TVisualObjCont::key_type aKey(theStudyId,theEntry);
 263     try{
 264 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 265       OCC_CATCH_SIGNALS;
 266 #endif
 267       TVisualObjCont::iterator anIter = VISUAL_OBJ_CONT.find(aKey);
 268       if(anIter != VISUAL_OBJ_CONT.end()){
 269         aVisualObj = anIter->second;
 270       }else{
 271         SalomeApp_Application* app =
 272           dynamic_cast<SalomeApp_Application*>( SMESHGUI::activeStudy()->application() );
 273         _PTR(Study) aStudy = SMESHGUI::activeStudy()->studyDS();
 274         _PTR(SObject) aSObj = aStudy->FindObjectID(theEntry);
 275         if(aSObj){
 276           _PTR(GenericAttribute) anAttr;
 277           if(aSObj->FindAttribute(anAttr,"AttributeIOR")){
 278             _PTR(AttributeIOR) anIOR = anAttr;
 279             CORBA::String_var aVal = anIOR->Value().c_str();
 280             CORBA::Object_var anObj = app->orb()->string_to_object( aVal.in() );
 281             if(!CORBA::is_nil(anObj)){
 282               //Try narrow to SMESH_Mesh interface
 283               SMESH::SMESH_Mesh_var aMesh = SMESH::SMESH_Mesh::_narrow(anObj);
 284               if(!aMesh->_is_nil()){
 285                 aVisualObj.reset(new SMESH_MeshObj(aMesh));
 286                 TVisualObjCont::value_type aValue(aKey,aVisualObj);
 287                 VISUAL_OBJ_CONT.insert(aValue);
 288               }
 289               //Try narrow to SMESH_Group interface
 290               SMESH::SMESH_GroupBase_var aGroup = SMESH::SMESH_GroupBase::_narrow(anObj);
 291               if(!aGroup->_is_nil()){
 292                 _PTR(SObject) aFatherSObj = aSObj->GetFather();
 293                 if(!aFatherSObj) return aVisualObj;
 294                 aFatherSObj = aFatherSObj->GetFather();
 295                 if(!aFatherSObj) return aVisualObj;
 296                 CORBA::String_var anEntry = aFatherSObj->GetID().c_str();
 297                 TVisualObjPtr aVisObj = GetVisualObj(theStudyId,anEntry.in());
 298                 if(SMESH_MeshObj* aMeshObj = dynamic_cast<SMESH_MeshObj*>(aVisObj.get())){
 299                   aVisualObj.reset(new SMESH_GroupObj(aGroup,aMeshObj));
 300                   TVisualObjCont::value_type aValue(aKey,aVisualObj);
 301                   VISUAL_OBJ_CONT.insert(aValue);
 302                 }
 303               }
 304               //Try narrow to SMESH_subMesh interface
 305               SMESH::SMESH_subMesh_var aSubMesh = SMESH::SMESH_subMesh::_narrow(anObj);
 306               if(!aSubMesh->_is_nil()){
 307                 _PTR(SObject) aFatherSObj = aSObj->GetFather();
 308                 if(!aFatherSObj) return aVisualObj;
 309                 aFatherSObj = aFatherSObj->GetFather();
 310                 if(!aFatherSObj) return aVisualObj;
 311                 CORBA::String_var anEntry = aFatherSObj->GetID().c_str();
 312                 TVisualObjPtr aVisObj = GetVisualObj(theStudyId,anEntry.in());
 313                 if(SMESH_MeshObj* aMeshObj = dynamic_cast<SMESH_MeshObj*>(aVisObj.get())){
 314                   aVisualObj.reset(new SMESH_subMeshObj(aSubMesh,aMeshObj));
 315                   TVisualObjCont::value_type aValue(aKey,aVisualObj);
 316                   VISUAL_OBJ_CONT.insert(aValue);
 317                 }
 318               }
 319             }
 320           }
 321         }
 322       }
 323     }catch(...){
 324       INFOS("GetMeshObj - There is no SMESH_Mesh object for the SALOMEDS::Strudy and Entry!!!");
 325       return TVisualObjPtr();
 326     }
 327     // Update object
 328     bool objModified = false;
 329     if ( aVisualObj ) {
 330       try {
 331 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 332         OCC_CATCH_SIGNALS;
 333 #endif
 334         objModified = aVisualObj->Update();
 335       }
 336       catch (...) {
 337 #ifdef _DEBUG_
 338         MESSAGE ( "Exception in SMESHGUI_VTKUtils::GetVisualObj()" );
 339 #endif
 340         RemoveVisualObjectWithActors( theEntry ); // remove this object
 341         OnVisuException();
 342         aVisualObj.reset();
 343       }
 344     }
 345
 346     if ( objModified ) {
 347       // PAL16631. Mesurements showed that to show aVisualObj in SHADING(default) mode,
 348       // ~10 times more memory is used than it occupies.
 349       // Warn the user if there is less free memory than 30 sizes of a grid
 350       // TODO: estimate memory usage in other modes and take current mode into account
 351       int freeMB = SMDS_Mesh::CheckMemory(true);
 352       int usedMB = aVisualObj->GetUnstructuredGrid()->GetActualMemorySize() / 1024;
 353       if ( freeMB > 0 && usedMB * 30 > freeMB ) {
 354 #ifdef _DEBUG_
 355         MESSAGE ( "SMESHGUI_VTKUtils::GetVisualObj(), freeMB=" << freeMB
 356                << ", usedMB=" << usedMB );
 357 #endif
 358         bool continu = false;
 359         if ( usedMB * 10 > freeMB )
 360           // even dont try to show
 361           SUIT_MessageBox::warning(SMESHGUI::desktop(), QObject::tr("SMESH_WRN_WARNING"),
 362                                    QObject::tr("SMESH_NO_MESH_VISUALIZATION"));
 363         else
 364           // there is a chance to succeed
 365           continu = SUIT_MessageBox::warning
 366             (SMESHGUI::desktop(),
 367              QObject::tr("SMESH_WRN_WARNING"),
 368              QObject::tr("SMESH_CONTINUE_MESH_VISUALIZATION"),
 369              SUIT_MessageBox::Yes | SUIT_MessageBox::No,
 370              SUIT_MessageBox::Yes ) == SUIT_MessageBox::Yes;
 371         if ( !continu ) {
 372           // remove the corresponding actors from all views
 373           RemoveVisualObjectWithActors( theEntry );
 374           aVisualObj.reset();
 375         }
 376       }
 377     }
 378
 379     return aVisualObj;
 380   }
 381
 382
 383   /*! Return active view window, if it instantiates SVTK_ViewWindow class,
 384    *  overwise find or create corresponding view window, make it active and return it.
 385    *  \note Active VVTK_ViewWindow can be returned, because it inherits SVTK_ViewWindow.
 386    */
 387   SVTK_ViewWindow* GetViewWindow (const SalomeApp_Module* theModule,
 388                                   bool createIfNotFound)
 389   {
 390     SalomeApp_Application* anApp;
 391     if (theModule)
 392       anApp = theModule->getApp();
 393     else
 394       anApp = dynamic_cast<SalomeApp_Application*>
 395         (SUIT_Session::session()->activeApplication());
 396
 397     if (anApp) {
 398       if (SVTK_ViewWindow* aView = dynamic_cast<SVTK_ViewWindow*>(anApp->desktop()->activeWindow()))
 399         return aView;
 400
 401       SUIT_ViewManager* aViewManager =
 402         anApp->getViewManager(SVTK_Viewer::Type(), createIfNotFound);
 403       if (aViewManager) {
 404         if (SUIT_ViewWindow* aViewWindow = aViewManager->getActiveView()) {
 405           if (SVTK_ViewWindow* aView = dynamic_cast<SVTK_ViewWindow*>(aViewWindow)) {
 406             aViewWindow->raise();
 407             aViewWindow->setFocus();
 408             return aView;
 409           }
 410         }
 411       }
 412     }
 413     return NULL;
 414   }
 415
 416   SVTK_ViewWindow* FindVtkViewWindow (SUIT_ViewManager* theMgr,
 417                                       SUIT_ViewWindow * theWindow)
 418   {
 419     if( !theMgr )
 420       return NULL;
 421
 422     QVector<SUIT_ViewWindow*> views = theMgr->getViews();
 423     if( views.contains( theWindow ) )
 424       return GetVtkViewWindow( theWindow );
 425     else
 426       return NULL;
 427   }
 428
 429   SVTK_ViewWindow* GetVtkViewWindow(SUIT_ViewWindow* theWindow){
 430     return dynamic_cast<SVTK_ViewWindow*>(theWindow);
 431   }
 432
 433 /*  SUIT_ViewWindow* GetActiveWindow()
 434   {
 435     SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( SUIT_Session::session()->activeApplication() );
 436     if( !app )
 437       return NULL;
 438     SUIT_ViewManager* mgr = app->activeViewManager();
 439     if( mgr )
 440       return mgr->getActiveView();
 441     else
 442       return NULL;
 443   }*/
 444
 445   SVTK_ViewWindow* GetCurrentVtkView(){
 446     return GetVtkViewWindow( GetActiveWindow() );
 447   }
 448
 449
 450   void RepaintCurrentView()
 451   {
 452     if (SVTK_ViewWindow* wnd = GetCurrentVtkView())
 453     {
 454       try {
 455 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 456         OCC_CATCH_SIGNALS;
 457 #endif
 458         wnd->getRenderer()->Render();
 459         wnd->Repaint(false);
 460       }
 461       catch (...) {
 462 #ifdef _DEBUG_
 463         MESSAGE ( "Exception in SMESHGUI_VTKUtils::RepaintCurrentView()" );
 464 #endif
 465         OnVisuException();
 466       }
 467     }
 468   }
 469
 470   void RepaintViewWindow(SVTK_ViewWindow* theWindow)
 471   {
 472     try {
 473 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 474       OCC_CATCH_SIGNALS;
 475 #endif
 476       theWindow->getRenderer()->Render();
 477       theWindow->Repaint();
 478     }
 479     catch (...) {
 480 #ifdef _DEBUG_
 481       MESSAGE ( "Exception in SMESHGUI_VTKUtils::RepaintViewWindow(SVTK_ViewWindow*)" );
 482 #endif
 483       OnVisuException();
 484     }
 485   }
 486
 487   void RenderViewWindow(SVTK_ViewWindow* theWindow)
 488   {
 489     try {
 490 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 491       OCC_CATCH_SIGNALS;
 492 #endif
 493       theWindow->getRenderer()->Render();
 494       theWindow->Repaint();
 495     }
 496     catch (...) {
 497 #ifdef _DEBUG_
 498       MESSAGE ( "Exception in SMESHGUI_VTKUtils::RenderViewWindow(SVTK_ViewWindow*)" );
 499 #endif
 500       OnVisuException();
 501     }
 502   }
 503
 504   void FitAll(){
 505     if(SVTK_ViewWindow* wnd = GetCurrentVtkView() ){
 506       try {
 507 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 508         OCC_CATCH_SIGNALS;
 509 #endif
 510         wnd->onFitAll();
 511         wnd->Repaint();
 512       }
 513       catch (...) {
 514 #ifdef _DEBUG_
 515         MESSAGE ( "Exception in SMESHGUI_VTKUtils::FitAll()" );
 516 #endif
 517         OnVisuException();
 518       }
 519     }
 520   }
 521
 522
 523   SMESH_Actor* FindActorByEntry(SUIT_ViewWindow *theWindow,
 524                                 const char* theEntry)
 525   {
 526     if(SVTK_ViewWindow* aViewWindow = GetVtkViewWindow(theWindow)){
 527       vtkRenderer *aRenderer = aViewWindow->getRenderer();
 528       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 529       vtkActorCollection *aCollection = aCopy.GetActors();
 530       aCollection->InitTraversal();
 531       while(vtkActor *anAct = aCollection->GetNextActor()){
 532         if(SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)){
 533           if(anActor->hasIO()){
 534             Handle(SALOME_InteractiveObject) anIO = anActor->getIO();
 535             if(anIO->hasEntry() && strcmp(anIO->getEntry(),theEntry) == 0){
 536               return anActor;
 537             }
 538           }
 539         }
 540       }
 541     }
 542     return NULL;
 543   }
 544
 545
 546   SMESH_Actor* FindActorByEntry(const char* theEntry){
 547     return FindActorByEntry(GetActiveWindow(),theEntry);
 548   }
 549
 550
 551   SMESH_Actor* FindActorByObject(CORBA::Object_ptr theObject){
 552     SalomeApp_Application* app = dynamic_cast<SalomeApp_Application*>( SUIT_Session::session()->activeApplication() );
 553     if( !app )
 554       return NULL;
 555
 556     if(!CORBA::is_nil(theObject)){
 557       _PTR(Study) aStudy = GetActiveStudyDocument();
 558       CORBA::String_var anIOR = app->orb()->object_to_string( theObject );
 559       _PTR(SObject) aSObject = aStudy->FindObjectIOR(anIOR.in());
 560       if(aSObject){
 561         CORBA::String_var anEntry = aSObject->GetID().c_str();
 562         return FindActorByEntry(anEntry.in());
 563       }
 564     }
 565     return NULL;
 566   }
 567
 568
 569   SMESH_Actor* CreateActor(_PTR(Study) theStudy,
 570                            const char* theEntry,
 571                            int theIsClear)
 572   {
 573     SMESH_Actor *anActor = NULL;
 574     CORBA::Long anId = theStudy->StudyId();
 575     if(TVisualObjPtr aVisualObj = GetVisualObj(anId,theEntry)){
 576       _PTR(SObject) aSObj = theStudy->FindObjectID(theEntry);
 577       if(aSObj){
 578         _PTR(GenericAttribute) anAttr;
 579         if(aSObj->FindAttribute(anAttr,"AttributeName")){
 580           _PTR(AttributeName) aName = anAttr;
 581           std::string aNameVal = aName->Value();
 582           anActor = SMESH_Actor::New(aVisualObj,theEntry,aNameVal.c_str(),theIsClear);
 583         }
 584
 585         SMESH::SMESH_GroupBase_var aGroup = SMESH::SMESH_GroupBase::_narrow( SMESH::SObjectToObject( aSObj ));
 586         if(!CORBA::is_nil(aGroup))
 587         {
 588           SALOMEDS::Color aColor = aGroup->GetColor();
 589           if( !( aColor.R > 0 || aColor.G > 0 || aColor.B > 0 ) )
 590           {
 591             int r = 0, g = 0, b = 0;
 592             SMESH::GetColor( "SMESH", "fill_color", r, g, b, QColor( 0, 170, 255 ) );
 593             aColor.R = (float)r / 255.0;
 594             aColor.G = (float)g / 255.0;
 595             aColor.B = (float)b / 255.0;
 596             aGroup->SetColor( aColor );
 597           }
 598           if( aGroup->GetType() == SMESH::NODE )
 599             anActor->SetNodeColor( aColor.R, aColor.G, aColor.B );
 600           else if( aGroup->GetType() == SMESH::EDGE )
 601             anActor->SetEdgeColor( aColor.R, aColor.G, aColor.B );
 602           else if( aGroup->GetType() == SMESH::ELEM0D )
 603             anActor->Set0DColor( aColor.R, aColor.G, aColor.B );
 604           else
 605             anActor->SetSufaceColor( aColor.R, aColor.G, aColor.B );
 606         }
 607       }
 608     }
 609     if( anActor )
 610       if( SMESHGUI* aSMESHGUI = SMESHGUI::GetSMESHGUI() )
 611         aSMESHGUI->addActorAsObserver( anActor );
 612     return anActor;
 613   }
 614
 615
 616   void DisplayActor( SUIT_ViewWindow *theWnd, SMESH_Actor* theActor){
 617     if(SVTK_ViewWindow* vtkWnd = GetVtkViewWindow(theWnd)){
 618       try {
 619 #if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
 620         OCC_CATCH_SIGNALS;
 621 #endif
 622         vtkWnd->AddActor(theActor);
 623         vtkWnd->Repaint();
 624       }
 625       catch (...) {
 626 #ifdef _DEBUG_
 627         MESSAGE ( "Exception in SMESHGUI_VTKUtils::DisplayActor()" );
 628 #endif
 629         OnVisuException();
 630       }
 631     }
 632   }
 633
 634
 635   void RemoveActor( SUIT_ViewWindow *theWnd, SMESH_Actor* theActor){
 636     if(SVTK_ViewWindow* vtkWnd = GetVtkViewWindow(theWnd)){
 637       vtkWnd->RemoveActor(theActor);
 638       if(theActor->hasIO()){
 639         Handle(SALOME_InteractiveObject) anIO = theActor->getIO();
 640         if(anIO->hasEntry()){
 641           std::string anEntry = anIO->getEntry();
 642           SalomeApp_Study* aStudy = dynamic_cast<SalomeApp_Study*>( vtkWnd->getViewManager()->study() );
 643           int aStudyId = aStudy->id();
 644           TVisualObjCont::key_type aKey(aStudyId,anEntry);
 645           VISUAL_OBJ_CONT.erase(aKey);
 646         }
 647       }
 648       theActor->Delete();
 649       vtkWnd->Repaint();
 650     }
 651   }
 652
 653   //================================================================================
 654   /*!
 655    * \brief Return true if there are no SMESH actors in a view
 656    */
 657   //================================================================================
 658
 659   bool noSmeshActors(SUIT_ViewWindow *theWnd)
 660   {
 661     if(SVTK_ViewWindow* aViewWindow = GetVtkViewWindow(theWnd)) {
 662       vtkRenderer *aRenderer = aViewWindow->getRenderer();
 663       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 664       vtkActorCollection *aCollection = aCopy.GetActors();
 665       aCollection->InitTraversal();
 666       while(vtkActor *anAct = aCollection->GetNextActor())
 667         if(dynamic_cast<SMESH_Actor*>(anAct))
 668           return false;
 669     }
 670     return true;
 671   }
 672
 673   bool UpdateView(SUIT_ViewWindow *theWnd, EDisplaing theAction, const char* theEntry)
 674   {
 675     bool OK = false;
 676     SVTK_ViewWindow* aViewWnd = GetVtkViewWindow(theWnd);
 677     if (!aViewWnd)
 678       return OK;
 679
 680     {
 681       OK = true;
 682       vtkRenderer *aRenderer = aViewWnd->getRenderer();
 683       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 684       vtkActorCollection *aCollection = aCopy.GetActors();
 685       aCollection->InitTraversal();
 686
 687       switch (theAction) {
 688       case eDisplayAll: {
 689         while (vtkActor *anAct = aCollection->GetNextActor()) {
 690           if (SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)) {
 691             anActor->SetVisibility(true);
 692           }
 693         }
 694         break;
 695       }
 696       case eDisplayOnly:
 697       case eEraseAll: {
 698         while (vtkActor *anAct = aCollection->GetNextActor()) {
 699           if (SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)) {
 700             anActor->SetVisibility(false);
 701           }
 702         }
 703       }
 704       default: {
 705         if (SMESH_Actor *anActor = FindActorByEntry(theWnd,theEntry)) {
 706           switch (theAction) {
 707             case eDisplay:
 708             case eDisplayOnly:
 709               anActor->SetVisibility(true);
 710               if (theAction == eDisplayOnly) aRenderer->ResetCameraClippingRange();
 711               break;
 712             case eErase:
 713               anActor->SetVisibility(false);
 714               break;
 715           }
 716         } else {
 717           switch (theAction) {
 718           case eDisplay:
 719           case eDisplayOnly:
 720             {
 721               SalomeApp_Study* aStudy = dynamic_cast<SalomeApp_Study*>(theWnd->getViewManager()->study());
 722               _PTR(Study) aDocument = aStudy->studyDS();
 723               // Pass non-visual objects (hypotheses, etc.), return true in this case
 724               CORBA::Long anId = aDocument->StudyId();
 725               TVisualObjPtr aVisualObj;
 726               if ( (aVisualObj = GetVisualObj(anId,theEntry)) && aVisualObj->IsValid())
 727               {
 728                 if ((anActor = CreateActor(aDocument,theEntry,true))) {
 729                   bool needFitAll = noSmeshActors(theWnd); // fit for the first object only
 730                   DisplayActor(theWnd,anActor);
 731                   // FitAll(); - PAL16770(Display of a group performs an automatic fit all)
 732                   if (needFitAll) FitAll();
 733                 } else {
 734                   OK = false;
 735                 }
 736               }
 737               break;
 738             }
 739           }
 740         }
 741       }
 742       }
 743     }
 744     return OK;
 745   }
 746
 747
 748   bool UpdateView(EDisplaing theAction, const char* theEntry){
 749     SalomeApp_Study* aStudy = dynamic_cast< SalomeApp_Study* >( GetActiveStudy() );
 750     SalomeApp_Application* app = dynamic_cast< SalomeApp_Application* >( aStudy->application() );
 751     SUIT_ViewWindow *aWnd = app->activeViewManager()->getActiveView();
 752     return UpdateView(aWnd,theAction,theEntry);
 753   }
 754
 755   void UpdateView(){
 756     if(SVTK_ViewWindow* aWnd = SMESH::GetCurrentVtkView()){
 757       LightApp_SelectionMgr* mgr = SMESHGUI::selectionMgr();
 758       SALOME_ListIO selected; mgr->selectedObjects( selected );
 759
 760       if( selected.Extent() == 0){
 761         vtkRenderer* aRenderer = aWnd->getRenderer();
 762         VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 763         vtkActorCollection *aCollection = aCopy.GetActors();
 764         aCollection->InitTraversal();
 765         while(vtkActor *anAct = aCollection->GetNextActor()){
 766           if(SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)){
 767             if(anActor->hasIO())
 768               if (!Update(anActor->getIO(),anActor->GetVisibility()))
 769                 break; // avoid multiple warinings if visu failed
 770           }
 771         }
 772       }else{
 773         SALOME_ListIteratorOfListIO anIter( selected );
 774         for( ; anIter.More(); anIter.Next()){
 775           Handle(SALOME_InteractiveObject) anIO = anIter.Value();
 776           if ( !Update(anIO,true) )
 777             break; // avoid multiple warinings if visu failed
 778         }
 779       }
 780       RepaintCurrentView();
 781     }
 782   }
 783
 784
 785   bool Update(const Handle(SALOME_InteractiveObject)& theIO, bool theDisplay)
 786   {
 787     _PTR(Study) aStudy = GetActiveStudyDocument();
 788     CORBA::Long anId = aStudy->StudyId();
 789     if ( TVisualObjPtr aVisualObj = SMESH::GetVisualObj(anId,theIO->getEntry())) {
 790       if ( theDisplay )
 791         UpdateView(SMESH::eDisplay,theIO->getEntry());
 792       return true;
 793     }
 794     return false;
 795   }
 796
 797
 798   void UpdateSelectionProp( SMESHGUI* theModule ) {
 799     if( !theModule )
 800       return;
 801
 802     SalomeApp_Application* app = dynamic_cast< SalomeApp_Application* >( theModule->application() );
 803     if( !app )
 804     {
 805       MESSAGE( "UpdateSelectionProp: Application is null" );
 806       return;
 807     }
 808
 809     SUIT_ViewManager* vm = app->activeViewManager();
 810     if( !vm )
 811     {
 812       MESSAGE( "UpdateSelectionProp: View manager is null" );
 813       return;
 814     }
 815
 816     QVector<SUIT_ViewWindow*> views = vm->getViews();
 817
 818     SUIT_ResourceMgr* mgr = SMESH::GetResourceMgr( theModule );
 819     if( !mgr )
 820     {
 821       MESSAGE( "UpdateSelectionProp: Resource manager is null" );
 822       return;
 823     }
 824
 825     QColor aHiColor = mgr->colorValue( "SMESH", "selection_object_color", Qt::white ),
 826            aSelColor = mgr->colorValue( "SMESH", "selection_element_color", Qt::yellow ),
 827            aPreColor = mgr->colorValue( "SMESH", "highlight_color", Qt::cyan );
 828
 829     int SW = mgr->integerValue( "SMESH", "selection_width", 5 ),
 830         PW = mgr->integerValue( "SMESH", "highlight_width", 5 );
 831
 832     // adjust highlight_width to the width of mesh entities
 833     int aElem0DSize = mgr->integerValue("SMESH", "elem0d_size", 5);
 834     int aLineWidth  = mgr->integerValue("SMESH", "element_width", 1);
 835     int maxSize = aElem0DSize;
 836     if (aElem0DSize > maxSize) maxSize = aElem0DSize;
 837     if (aLineWidth > maxSize) maxSize = aLineWidth;
 838     if (PW < maxSize + 2) PW = maxSize + 2;
 839
 840     double SP1 = mgr->doubleValue( "SMESH", "selection_precision_node", 0.025 ),
 841            SP2 = mgr->doubleValue( "SMESH", "selection_precision_element", 0.001 ),
 842            SP3 = mgr->doubleValue( "SMESH", "selection_precision_object", 0.025 );
 843
 844     for ( int i=0, n=views.count(); i<n; i++ ){
 845       // update VTK viewer properties
 846       if(SVTK_ViewWindow* aVtkView = GetVtkViewWindow( views[i] )){
 847         // mesh element selection
 848         aVtkView->SetSelectionProp(aSelColor.red()/255.,
 849                                    aSelColor.green()/255.,
 850                                    aSelColor.blue()/255.,
 851                                    SW );
 852         // tolerances
 853         aVtkView->SetSelectionTolerance(SP1, SP2, SP3);
 854
 855         // pre-selection
 856         aVtkView->SetPreselectionProp(aPreColor.red()/255.,
 857                                       aPreColor.green()/255.,
 858                                       aPreColor.blue()/255.,
 859                                       PW);
 860         // update actors
 861         vtkRenderer* aRenderer = aVtkView->getRenderer();
 862         VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 863         vtkActorCollection *aCollection = aCopy.GetActors();
 864         aCollection->InitTraversal();
 865         while(vtkActor *anAct = aCollection->GetNextActor()){
 866           if(SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)){
 867             anActor->SetHighlightColor(aHiColor.red()/255.,
 868                                        aHiColor.green()/255.,
 869                                        aHiColor.blue()/255.);
 870             anActor->SetPreHighlightColor(aPreColor.red()/255.,
 871                                           aPreColor.green()/255.,
 872                                           aPreColor.blue()/255.);
 873           }
 874         }
 875       }
 876     }
 877   }
 878
 879
 880   //----------------------------------------------------------------------------
 881   SVTK_Selector*
 882   GetSelector(SUIT_ViewWindow *theWindow)
 883   {
 884     if(SVTK_ViewWindow* aWnd = GetVtkViewWindow(theWindow))
 885       return aWnd->GetSelector();
 886
 887     return NULL;
 888   }
 889
 890   void SetFilter(const Handle(VTKViewer_Filter)& theFilter,
 891                  SVTK_Selector* theSelector)
 892   {
 893     if (theSelector)
 894       theSelector->SetFilter(theFilter);
 895   }
 896
 897   Handle(VTKViewer_Filter) GetFilter(int theId, SVTK_Selector* theSelector)
 898   {
 899     return theSelector->GetFilter(theId);
 900   }
 901
 902   bool IsFilterPresent(int theId, SVTK_Selector* theSelector)
 903   {
 904     return theSelector->IsFilterPresent(theId);
 905   }
 906
 907   void RemoveFilter(int theId, SVTK_Selector* theSelector)
 908   {
 909     theSelector->RemoveFilter(theId);
 910   }
 911
 912   void RemoveFilters(SVTK_Selector* theSelector)
 913   {
 914     for ( int id = SMESH::NodeFilter; theSelector && id < SMESH::LastFilter; id++ )
 915       theSelector->RemoveFilter( id );
 916   }
 917
 918   bool IsValid(SALOME_Actor* theActor, int theCellId,
 919                SVTK_Selector* theSelector)
 920   {
 921     return theSelector->IsValid(theActor,theCellId);
 922   }
 923
 924
 925   //----------------------------------------------------------------------------
 926   void SetPointRepresentation(bool theIsVisible){
 927     if(SVTK_ViewWindow* aViewWindow = GetCurrentVtkView()){
 928       vtkRenderer *aRenderer = aViewWindow->getRenderer();
 929       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 930       vtkActorCollection *aCollection = aCopy.GetActors();
 931       aCollection->InitTraversal();
 932       while(vtkActor *anAct = aCollection->GetNextActor()){
 933         if(SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct)){
 934           if(anActor->GetVisibility()){
 935             anActor->SetPointRepresentation(theIsVisible);
 936           }
 937         }
 938       }
 939       RepaintCurrentView();
 940     }
 941   }
 942
 943
 944   void SetPickable(SMESH_Actor* theActor){
 945     if(SVTK_ViewWindow* aWnd = GetCurrentVtkView()){
 946       int anIsAllPickable = (theActor == NULL);
 947       vtkRenderer *aRenderer = aWnd->getRenderer();
 948       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
 949       vtkActorCollection *aCollection = aCopy.GetActors();
 950       aCollection->InitTraversal();
 951       while(vtkActor *anAct = aCollection->GetNextActor()){
 952         if(SALOME_Actor *anActor = dynamic_cast<SALOME_Actor*>(anAct)){
 953           if(anActor->GetVisibility()){
 954             anActor->SetPickable(anIsAllPickable);
 955           }
 956         }
 957       }
 958       if(theActor)
 959         theActor->SetPickable(!anIsAllPickable);
 960       RepaintCurrentView();
 961     }
 962   }
 963
 964
 965   //----------------------------------------------------------------------------
 966   int GetNameOfSelectedNodes(SVTK_Selector* theSelector,
 967                              const Handle(SALOME_InteractiveObject)& theIO,
 968                              QString& theName)
 969   {
 970     theName = "";
 971     TColStd_IndexedMapOfInteger aMapIndex;
 972     theSelector->GetIndex(theIO,aMapIndex);
 973
 974     for(int i = 1; i <= aMapIndex.Extent(); i++)
 975       theName += QString(" %1").arg(aMapIndex(i));
 976
 977     return aMapIndex.Extent();
 978   }
 979
 980   int GetNameOfSelectedElements(SVTK_Selector* theSelector,
 981                                 const Handle(SALOME_InteractiveObject)& theIO,
 982                                 QString& theName)
 983   {
 984     theName = "";
 985     TColStd_IndexedMapOfInteger aMapIndex;
 986     theSelector->GetIndex(theIO,aMapIndex);
 987
 988     typedef std::set<int> TIdContainer;
 989     TIdContainer anIdContainer;
 990     for( int i = 1; i <= aMapIndex.Extent(); i++)
 991       anIdContainer.insert(aMapIndex(i));
 992
 993     TIdContainer::const_iterator anIter = anIdContainer.begin();
 994     for( ; anIter != anIdContainer.end(); anIter++)
 995       theName += QString(" %1").arg(*anIter);
 996
 997     return aMapIndex.Extent();
 998   }
 999
1000
1001   int GetEdgeNodes(SVTK_Selector* theSelector,
1002                    const TVisualObjPtr& theVisualObject,
1003                    int& theId1,
1004                    int& theId2)
1005   {
1006     const SALOME_ListIO& selected = theSelector->StoredIObjects();
1007
1008     if ( selected.Extent() != 1 )
1009       return -1;
1010
1011     Handle(SALOME_InteractiveObject) anIO = selected.First();
1012     if ( anIO.IsNull() || !anIO->hasEntry() )
1013       return -1;
1014
1015     TColStd_IndexedMapOfInteger aMapIndex;
1016     theSelector->GetIndex( anIO, aMapIndex );
1017     if ( aMapIndex.Extent() != 2 )
1018       return -1;
1019
1020     int anObjId = -1, anEdgeNum = -1;
1021     for ( int i = 1; i <= aMapIndex.Extent(); i++ ) {
1022       int aVal = aMapIndex( i );
1023       if ( aVal > 0 )
1024         anObjId = aVal;
1025       else
1026         anEdgeNum = abs( aVal ) - 1;
1027     }
1028
1029     if ( anObjId == -1 || anEdgeNum == -1 )
1030       return -1;
1031
1032     return theVisualObject->GetEdgeNodes( anObjId, anEdgeNum, theId1, theId2 ) ? 1 : -1;
1033   }
1034
1035   //----------------------------------------------------------------------------
1036   int GetNameOfSelectedNodes(LightApp_SelectionMgr *theMgr,
1037                              const Handle(SALOME_InteractiveObject)& theIO,
1038                              QString& theName)
1039   {
1040     theName = "";
1041     if(theIO->hasEntry()){
1042       if(FindActorByEntry(theIO->getEntry())){
1043         TColStd_IndexedMapOfInteger aMapIndex;
1044         theMgr->GetIndexes(theIO,aMapIndex);
1045         for(int i = 1; i <= aMapIndex.Extent(); i++){
1046           theName += QString(" %1").arg(aMapIndex(i));
1047         }
1048         return aMapIndex.Extent();
1049       }
1050     }
1051     return -1;
1052   }
1053
1054   int GetNameOfSelectedNodes(LightApp_SelectionMgr *theMgr, QString& theName){
1055     theName = "";
1056     SALOME_ListIO selected; theMgr->selectedObjects( selected );
1057     if(selected.Extent() == 1){
1058       Handle(SALOME_InteractiveObject) anIO = selected.First();
1059       return GetNameOfSelectedNodes(theMgr,anIO,theName);
1060     }
1061     return -1;
1062   }
1063
1064
1065   int GetNameOfSelectedElements(LightApp_SelectionMgr *theMgr,
1066                                 const Handle(SALOME_InteractiveObject)& theIO,
1067                                 QString& theName)
1068   {
1069     theName = "";
1070     if(theIO->hasEntry()){
1071       if(FindActorByEntry(theIO->getEntry())){
1072         TColStd_IndexedMapOfInteger aMapIndex;
1073         theMgr->GetIndexes(theIO,aMapIndex);
1074         typedef std::set<int> TIdContainer;
1075         TIdContainer anIdContainer;
1076         for( int i = 1; i <= aMapIndex.Extent(); i++)
1077           anIdContainer.insert(aMapIndex(i));
1078         TIdContainer::const_iterator anIter = anIdContainer.begin();
1079         for( ; anIter != anIdContainer.end(); anIter++){
1080           theName += QString(" %1").arg(*anIter);
1081         }
1082         return aMapIndex.Extent();
1083       }
1084     }
1085     return -1;
1086   }
1087
1088
1089   int GetNameOfSelectedElements(LightApp_SelectionMgr *theMgr, QString& theName)
1090   {
1091     theName = "";
1092     SALOME_ListIO selected; theMgr->selectedObjects( selected );
1093
1094     if( selected.Extent() == 1){
1095       Handle(SALOME_InteractiveObject) anIO = selected.First();
1096       return GetNameOfSelectedElements(theMgr,anIO,theName);
1097     }
1098     return -1;
1099   }
1100
1101   int GetSelected(LightApp_SelectionMgr*       theMgr,
1102                   TColStd_IndexedMapOfInteger& theMap,
1103                   const bool                   theIsElement)
1104   {
1105     theMap.Clear();
1106     SALOME_ListIO selected; theMgr->selectedObjects( selected );
1107
1108     if ( selected.Extent() == 1 )
1109     {
1110       Handle(SALOME_InteractiveObject) anIO = selected.First();
1111       if ( anIO->hasEntry() ) {
1112         theMgr->GetIndexes( anIO, theMap );
1113       }
1114     }
1115     return theMap.Extent();
1116   }
1117
1118
1119   int GetEdgeNodes( LightApp_SelectionMgr* theMgr, int& theId1, int& theId2 )
1120   {
1121     SALOME_ListIO selected; theMgr->selectedObjects( selected );
1122
1123     if ( selected.Extent() != 1 )
1124       return -1;
1125
1126     Handle(SALOME_InteractiveObject) anIO = selected.First();
1127     if ( anIO.IsNull() || !anIO->hasEntry() )
1128       return -1;
1129
1130     SMESH_Actor *anActor = SMESH::FindActorByEntry( anIO->getEntry() );
1131     if ( anActor == 0 )
1132       return -1;
1133
1134     TColStd_IndexedMapOfInteger aMapIndex;
1135     theMgr->GetIndexes( anIO, aMapIndex );
1136     if ( aMapIndex.Extent() != 2 )
1137       return -1;
1138
1139     int anObjId = -1, anEdgeNum = -1;
1140     for ( int i = 1; i <= aMapIndex.Extent(); i++ ) {
1141       int aVal = aMapIndex( i );
1142       if ( aVal > 0 )
1143         anObjId = aVal;
1144       else
1145         anEdgeNum = abs( aVal );
1146     }
1147
1148     if ( anObjId == -1 || anEdgeNum == -1 )
1149       return -1;
1150
1151     return anActor->GetObject()->GetEdgeNodes( anObjId, anEdgeNum, theId1, theId2 ) ? 1 : -1;
1152   }
1153
1154   void SetControlsPrecision( const long theVal )
1155   {
1156     if( SVTK_ViewWindow* aWnd = SMESH::GetCurrentVtkView() )
1157     {
1158       vtkRenderer *aRenderer = aWnd->getRenderer();
1159       VTK::ActorCollectionCopy aCopy(aRenderer->GetActors());
1160       vtkActorCollection *aCollection = aCopy.GetActors();
1161       aCollection->InitTraversal();
1162
1163       while ( vtkActor *anAct = aCollection->GetNextActor())
1164       {
1165         if ( SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>( anAct ) )
1166         {
1167           anActor->SetControlsPrecision( theVal );
1168           anActor->SetControlMode( anActor->GetControlMode() );
1169         }
1170       }
1171
1172     }
1173   }
1174
1175   //----------------------------------------------------------------------------
1176   // internal function
1177   void ComputeBoundsParam( vtkFloatingPointType theBounds[6],
1178                            vtkFloatingPointType theDirection[3],
1179                            vtkFloatingPointType theMinPnt[3],
1180                            vtkFloatingPointType& theMaxBoundPrj,
1181                            vtkFloatingPointType& theMinBoundPrj )
1182   {
1183     //Enlarge bounds in order to avoid conflicts of precision
1184     for(int i = 0; i < 6; i += 2){
1185       static double EPS = 1.0E-3;
1186       vtkFloatingPointType aDelta = (theBounds[i+1] - theBounds[i])*EPS;
1187       theBounds[i] -= aDelta;
1188       theBounds[i+1] += aDelta;
1189     }
1190
1191     vtkFloatingPointType aBoundPoints[8][3] = { {theBounds[0],theBounds[2],theBounds[4]},
1192                                                 {theBounds[1],theBounds[2],theBounds[4]},
1193                                                 {theBounds[0],theBounds[3],theBounds[4]},
1194                                                 {theBounds[1],theBounds[3],theBounds[4]},
1195                                                 {theBounds[0],theBounds[2],theBounds[5]},
1196                                                 {theBounds[1],theBounds[2],theBounds[5]},
1197                                                 {theBounds[0],theBounds[3],theBounds[5]},
1198                                                 {theBounds[1],theBounds[3],theBounds[5]}};
1199
1200     int aMaxId = 0, aMinId = aMaxId;
1201     theMaxBoundPrj = vtkMath::Dot(theDirection,aBoundPoints[aMaxId]);
1202     theMinBoundPrj = theMaxBoundPrj;
1203     for(int i = 1; i < 8; i++){
1204       vtkFloatingPointType aTmp = vtkMath::Dot(theDirection,aBoundPoints[i]);
1205       if(theMaxBoundPrj < aTmp){
1206         theMaxBoundPrj = aTmp;
1207         aMaxId = i;
1208       }
1209       if(theMinBoundPrj > aTmp){
1210         theMinBoundPrj = aTmp;
1211         aMinId = i;
1212       }
1213     }
1214     vtkFloatingPointType *aMinPnt = aBoundPoints[aMaxId];
1215     theMinPnt[0] = aMinPnt[0];
1216     theMinPnt[1] = aMinPnt[1];
1217     theMinPnt[2] = aMinPnt[2];
1218   }
1219
1220   // internal function
1221   void DistanceToPosition( vtkFloatingPointType theBounds[6],
1222                            vtkFloatingPointType theDirection[3],
1223                            vtkFloatingPointType theDist,
1224                            vtkFloatingPointType thePos[3] )
1225   {
1226     vtkFloatingPointType aMaxBoundPrj, aMinBoundPrj, aMinPnt[3];
1227     ComputeBoundsParam(theBounds,theDirection,aMinPnt,aMaxBoundPrj,aMinBoundPrj);
1228     vtkFloatingPointType aLength = (aMaxBoundPrj-aMinBoundPrj)*theDist;
1229     thePos[0] = aMinPnt[0]-theDirection[0]*aLength;
1230     thePos[1] = aMinPnt[1]-theDirection[1]*aLength;
1231     thePos[2] = aMinPnt[2]-theDirection[2]*aLength;
1232   }
1233
1234   // internal function (currently unused, left just in case)
1235   void PositionToDistance( vtkFloatingPointType theBounds[6],
1236                            vtkFloatingPointType theDirection[3],
1237                            vtkFloatingPointType thePos[3],
1238                            vtkFloatingPointType& theDist )
1239   {
1240     vtkFloatingPointType aMaxBoundPrj, aMinBoundPrj, aMinPnt[3];
1241     ComputeBoundsParam(theBounds,theDirection,aMinPnt,aMaxBoundPrj,aMinBoundPrj);
1242     vtkFloatingPointType aPrj = vtkMath::Dot(theDirection,thePos);
1243     theDist = (aPrj-aMinBoundPrj)/(aMaxBoundPrj-aMinBoundPrj);
1244   }
1245
1246   bool ComputeClippingPlaneParameters( std::list<vtkActor*> theActorList,
1247                                        vtkFloatingPointType theNormal[3],
1248                                        vtkFloatingPointType theDist,
1249                                        vtkFloatingPointType theBounds[6],
1250                                        vtkFloatingPointType theOrigin[3] )
1251   {
1252     bool anIsOk = false;
1253     theBounds[0] = theBounds[2] = theBounds[4] = VTK_DOUBLE_MAX;
1254     theBounds[1] = theBounds[3] = theBounds[5] = -VTK_DOUBLE_MAX;
1255     std::list<vtkActor*>::iterator anIter = theActorList.begin();
1256     for( ; anIter != theActorList.end(); anIter++ ) {
1257       if( vtkActor* aVTKActor = *anIter ) {
1258         if( SMESH_Actor* anActor = SMESH_Actor::SafeDownCast( aVTKActor ) ) {
1259           vtkFloatingPointType aBounds[6];
1260           anActor->GetUnstructuredGrid()->GetBounds( aBounds );
1261           theBounds[0] = std::min( theBounds[0], aBounds[0] );
1262           theBounds[1] = std::max( theBounds[1], aBounds[1] );
1263           theBounds[2] = std::min( theBounds[2], aBounds[2] );
1264           theBounds[3] = std::max( theBounds[3], aBounds[3] );
1265           theBounds[4] = std::min( theBounds[4], aBounds[4] );
1266           theBounds[5] = std::max( theBounds[5], aBounds[5] );
1267           anIsOk = true;
1268         }
1269       }
1270     }
1271
1272     if( !anIsOk )
1273       return false;
1274
1275     DistanceToPosition( theBounds, theNormal, theDist, theOrigin );
1276     return true;
1277   }
1278 } // end of namespace SMESH