src/XGUI/XGUI_Viewer.cpp

   1 #include "XGUI_Viewer.h"
   2 #include "XGUI_MainWindow.h"
   3 #include "XGUI_ViewWindow.h"
   4 #include "XGUI_ViewPort.h"
   5
   6 #include <QMdiArea>
   7 #include <QMdiSubWindow>
   8 #include <QApplication>
   9
  10 #include <V3d_View.hxx>
  11
  12 #include <Aspect_DisplayConnection.hxx>
  13 #include <Graphic3d.hxx>
  14 #include <Graphic3d_GraphicDriver.hxx>
  15 #include <Geom_Axis2Placement.hxx>
  16 #include <AIS_Drawer.hxx>
  17 #include <Prs3d_DatumAspect.hxx>
  18 #include <Prs3d_LineAspect.hxx>
  19 #include <V3d_View.hxx>
  20 #include <Visual3d_View.hxx>
  21 #include <AIS_ListOfInteractive.hxx>
  22 #include <AIS_ListIteratorOfListOfInteractive.hxx>
  23 #include <AIS_Shape.hxx>
  24
  25 #include <QMouseEvent>
  26
  27 #ifdef WIN32
  28 #include <WNT_Window.hxx>
  29 #else
  30 #include <Xw_Window.hxx>
  31 #endif
  32
  33 XGUI_Viewer::InteractionStyle2StatesMap XGUI_Viewer::myStateMap;
  34 XGUI_Viewer::InteractionStyle2ButtonsMap XGUI_Viewer::myButtonMap;
  35 static bool isInitialized = false;
  36
  37 /*!
  38  Creates viewer 3d [ static ]
  39  */
  40 Handle(V3d_Viewer) CreateViewer(const Standard_ExtString name, const Standard_CString displayName,
  41                                 const Standard_CString domain, const Standard_Real viewSize,
  42                                 const V3d_TypeOfOrientation viewProjection,
  43                                 const Standard_Boolean computedMode,
  44                                 const Standard_Boolean defaultComputedMode)
  45 {
  46   static Handle(Graphic3d_GraphicDriver) aGraphicDriver;
  47   if (aGraphicDriver.IsNull()) {
  48     Handle(Aspect_DisplayConnection) aDisplayConnection;
  49 #ifndef WIN32
  50     aDisplayConnection = new Aspect_DisplayConnection( displayName );
  51 #else
  52     aDisplayConnection = new Aspect_DisplayConnection();
  53 #endif
  54     aGraphicDriver = Graphic3d::InitGraphicDriver(aDisplayConnection);
  55   }
  56
  57   return new V3d_Viewer(aGraphicDriver, name, domain, viewSize, viewProjection, Quantity_NOC_GRAY30,
  58                         V3d_ZBUFFER, V3d_GOURAUD, V3d_WAIT, computedMode, defaultComputedMode,
  59                         V3d_TEX_NONE);
  60 }
  61
  62 // VSR: Uncomment below line to allow texture background support in OCC viewer
  63 #define OCC_ENABLE_TEXTURED_BACKGROUND
  64
  65 /*!
  66  Get data for supported background modes: gradient types, identifiers and supported image formats
  67  */
  68 QString XGUI_Viewer::backgroundData(QStringList& gradList, QIntList& idList, QIntList& txtList)
  69 {
  70   gradList << tr("Horizontal gradient") << tr("Vertical gradient")
  71       << tr("First diagonal gradient") << tr("Second diagonal gradient")
  72       << tr("First corner gradient") << tr("Second corner gradient")
  73       << tr("Third corner gradient") << tr("Fourth corner gradient");
  74   idList << XGUI::HorizontalGradient << XGUI::VerticalGradient << XGUI::Diagonal1Gradient
  75       << XGUI::Diagonal2Gradient << XGUI::Corner1Gradient << XGUI::Corner2Gradient
  76       << XGUI::Corner3Gradient << XGUI::Corner4Gradient;
  77 #ifdef OCC_ENABLE_TEXTURED_BACKGROUND
  78   txtList << XGUI::CenterTexture << XGUI::TileTexture << XGUI::StretchTexture;
  79 #endif
  80   return tr("Image files (*.bmp *.gif *.pix *.xwd *.rgb *.rs)");
  81 }
  82
  83 XGUI_Viewer::XGUI_Viewer(XGUI_MainWindow* theParent, bool DisplayTrihedron)
  84     : QObject(theParent),
  85     myMainWindow(theParent),
  86     myPreselectionEnabled(true),
  87     mySelectionEnabled(true),
  88     myMultiSelectionEnabled(true),
  89     myIsRelative(true),
  90     myInteractionStyle(XGUI::STANDARD),
  91     myTrihedronSize(100),
  92     myActiveView(0),
  93     myWndIdCount(0)
  94 {
  95   if (!isInitialized) {
  96     isInitialized = true;
  97
  98     // standard interaction style
  99     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::ControlModifier;
 100     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::LeftButton;
 101
 102     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::PAN] = Qt::ControlModifier;
 103     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::PAN] = Qt::MidButton;
 104
 105     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::ControlModifier;
 106     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::RightButton;
 107
 108     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::ControlModifier;
 109     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::RightButton;
 110
 111     // "key free" interaction style
 112     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::NoModifier;
 113     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::RightButton;
 114
 115     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::NoModifier;
 116     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::MidButton;
 117
 118     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::NoModifier;
 119     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::LeftButton;
 120
 121     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoModifier; // unused
 122     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoButton; // unused
 123   }
 124
 125   // init CasCade viewers
 126   myV3dViewer = CreateViewer(TCollection_ExtendedString("Viewer3d").ToExtString(), "", "", 1000.0,
 127                              V3d_XposYnegZpos, Standard_True, Standard_True);
 128   myV3dViewer->SetDefaultLights();
 129
 130   // init selector
 131   myAISContext = new AIS_InteractiveContext(myV3dViewer);
 132   myAISContext->SelectionColor(Quantity_NOC_WHITE);
 133
 134   // display isoline on planar faces (box for ex.)
 135   myAISContext->IsoOnPlane(true);
 136
 137   if (DisplayTrihedron) {
 138     Handle(Geom_Axis2Placement) anAxis = new Geom_Axis2Placement(gp::XOY());
 139     myTrihedron = new AIS_Trihedron(anAxis);
 140     myTrihedron->SetInfiniteState( Standard_True);
 141
 142     Quantity_Color Col(193 / 255., 205 / 255., 193 / 255., Quantity_TOC_RGB);
 143     myTrihedron->SetArrowColor(Col.Name());
 144     myTrihedron->SetSize(myTrihedronSize);
 145     Handle(AIS_Drawer) drawer = myTrihedron->Attributes();
 146     if (drawer->HasDatumAspect()) {
 147       Handle(Prs3d_DatumAspect) daspect = drawer->DatumAspect();
 148       daspect->FirstAxisAspect()->SetColor(Quantity_Color(1.0, 0.0, 0.0, Quantity_TOC_RGB));
 149       daspect->SecondAxisAspect()->SetColor(Quantity_Color(0.0, 1.0, 0.0, Quantity_TOC_RGB));
 150       daspect->ThirdAxisAspect()->SetColor(Quantity_Color(0.0, 0.0, 1.0, Quantity_TOC_RGB));
 151     }
 152   }
 153   // set zooming style to standard
 154   //myZoomingStyle = 0;
 155
 156   QMdiArea* aMDI = myMainWindow->mdiArea();
 157   connect(aMDI, SIGNAL(subWindowActivated(QMdiSubWindow*)), this, SLOT(onWindowActivated(QMdiSubWindow*)));
 158
 159 }
 160
 161 XGUI_Viewer::~XGUI_Viewer(void)
 162 {
 163   myAISContext.Nullify();
 164   myV3dViewer.Nullify();
 165 }
 166
 167 QMdiSubWindow* XGUI_Viewer::createView(V3d_TypeOfView theType)
 168 {
 169   // create view frame
 170   XGUI_ViewWindow* view = new XGUI_ViewWindow(this, theType);
 171   // get main view window (created by view frame)
 172   //OCCViewer_ViewWindow* vw = view->getView(OCCViewer_ViewFrame::MAIN_VIEW);
 173   // initialize main view window
 174   //initView( vw );
 175   // set default background for view window
 176   //vw->setBackground( background(0) ); // 0 means MAIN_VIEW (other views are not yet created here)
 177   // connect signal from viewport
 178   //connect(view->viewPort(), SIGNAL(vpClosed()), this, SLOT(onViewClosed()));
 179     //connect(view->viewPort(), SIGNAL(vpMapped()), this, SLOT(onViewMapped()));
 180   if (myViews.size() == 0)
 181     setTrihedronShown(true);
 182
 183   view->setBackground(XGUI_ViewBackground(XGUI::VerticalGradient, Qt::white, QColor(Qt::blue).lighter()));
 184   //view->setBackground(XGUI_ViewBackground(Qt::black));
 185   view->updateEnabledDrawMode();
 186
 187   QMdiArea* aMDI = myMainWindow->mdiArea();
 188   QMdiSubWindow* aWnd = aMDI->addSubWindow(view, Qt::FramelessWindowHint);
 189   addView(aWnd);
 190   aWnd->setGeometry(0, 0, aMDI->width() / 2, aMDI->height() / 2);
 191   aWnd->show();
 192   aWnd->setWindowTitle(QString("Viewer #%1").arg(++myWndIdCount));
 193   emit viewCreated(view);
 194   return aWnd;
 195 }
 196
 197 XGUI_ViewWindow* XGUI_Viewer::activeViewWindow() const
 198 {
 199   return dynamic_cast<XGUI_ViewWindow*>(myActiveView->widget());
 200 }
 201
 202 void XGUI_Viewer::getSelectedObjects(AIS_ListOfInteractive& theList)
 203 {
 204   theList.Clear();
 205   for (myAISContext->InitSelected(); myAISContext->MoreSelected(); myAISContext->NextSelected())
 206     theList.Append(myAISContext->SelectedInteractive());
 207 }
 208
 209 void XGUI_Viewer::getSelectedShapes(NCollection_List<TopoDS_Shape>& theList)
 210 {
 211   Handle(AIS_InteractiveContext) ic = AISContext();
 212
 213   for (ic->InitSelected(); ic->MoreSelected(); ic->NextSelected()) {
 214     TopoDS_Shape aShape = ic->SelectedShape();
 215     if (!aShape.IsNull())
 216       theList.Append(aShape);
 217   }
 218 }
 219
 220 void XGUI_Viewer::setObjectsSelected(const AIS_ListOfInteractive& theList)
 221 {
 222   AIS_ListIteratorOfListOfInteractive aIt;
 223   for (aIt.Initialize(theList); aIt.More(); aIt.Next())
 224     myAISContext->AddOrRemoveSelected(aIt.Value(), false);
 225   myAISContext->UpdateCurrentViewer();
 226 }
 227
 228 /*! Sets hot button
 229  *\param theOper - hot operation
 230  *\param theState - adding state to state map operations.
 231  *\param theButton - adding state to button map operations.
 232  */
 233 void XGUI_Viewer::setHotButton(XGUI::InteractionStyle theInteractionStyle,
 234                                XGUI::HotOperation theOper, Qt::KeyboardModifiers theState,
 235                                Qt::MouseButtons theButton)
 236 {
 237   myStateMap[theInteractionStyle][theOper] = theState;
 238   myButtonMap[theInteractionStyle][theOper] = theButton;
 239 }
 240
 241 /*! Gets hot button for operation \a theOper.
 242  *\param theOper - input hot operation
 243  *\param theState - output state from state map operations.
 244  *\param theButton - output state from button map operations.
 245  */
 246 void XGUI_Viewer::getHotButton(XGUI::InteractionStyle theInteractionStyle,
 247                                XGUI::HotOperation theOper, Qt::KeyboardModifiers& theState,
 248                                Qt::MouseButtons& theButton)
 249 {
 250   theState = myStateMap[theInteractionStyle][theOper];
 251   theButton = myButtonMap[theInteractionStyle][theOper];
 252 }
 253
 254 /*!
 255  Changes visibility of trihedron to opposite
 256  */
 257 void XGUI_Viewer::toggleTrihedron()
 258 {
 259   setTrihedronShown(!isTrihedronVisible());
 260 }
 261
 262 /*!
 263  \return true if trihedron is visible
 264  */
 265 bool XGUI_Viewer::isTrihedronVisible() const
 266 {
 267   return !myTrihedron.IsNull() && !myAISContext.IsNull() && myAISContext->IsDisplayed(myTrihedron);
 268 }
 269
 270 /*!
 271  Sets visibility state of trihedron
 272  \param on - new state
 273  */
 274
 275 void XGUI_Viewer::setTrihedronShown(bool on)
 276 {
 277   if (myTrihedron.IsNull())
 278     return;
 279
 280   if (on) {
 281     myAISContext->Display(myTrihedron);
 282     myAISContext->Deactivate(myTrihedron);
 283   } else {
 284     myAISContext->Erase(myTrihedron);
 285   }
 286 }
 287
 288 /*!
 289  \return trihedron size
 290  */
 291 double XGUI_Viewer::trihedronSize() const
 292 {
 293   double sz = 0;
 294   if (!myTrihedron.IsNull())
 295     sz = myTrihedron->Size();
 296   return sz;
 297 }
 298
 299 /*!
 300  Changes trihedron size
 301  \param sz - new size
 302  */
 303 void XGUI_Viewer::setTrihedronSize(const double sz, bool isRelative)
 304 {
 305   if (myTrihedronSize != sz || isRelative != myIsRelative) {
 306     myTrihedronSize = sz;
 307     myIsRelative = isRelative;
 308     updateTrihedron();
 309   }
 310 }
 311
 312 /*!
 313  * Update the size of the trihedron
 314  */
 315 void XGUI_Viewer::updateTrihedron()
 316 {
 317   if (myTrihedron.IsNull())
 318     return;
 319
 320   if (myIsRelative) {
 321     double newSz, oldSz;
 322
 323     if (computeTrihedronSize(newSz, oldSz))
 324       myTrihedron->SetSize(newSz);
 325
 326   } else if (myTrihedron->Size() != myTrihedronSize) {
 327     myTrihedron->SetSize(myTrihedronSize);
 328   }
 329 }
 330
 331 /*!
 332  Get new and current trihedron size corresponding to the current model size
 333  */
 334 bool XGUI_Viewer::computeTrihedronSize(double& theNewSize, double& theSize)
 335 {
 336   theNewSize = 100;
 337   theSize = 100;
 338
 339   //SRN: BUG IPAL8996, a usage of method ActiveView without an initialization
 340   Handle(V3d_Viewer) viewer = v3dViewer();
 341   viewer->InitActiveViews();
 342   if (!viewer->MoreActiveViews())
 343     return false;
 344
 345   Handle(V3d_View) view3d = viewer->ActiveView();
 346   //SRN: END of fix
 347
 348   if (view3d.IsNull())
 349     return false;
 350
 351   double Xmin = 0, Ymin = 0, Zmin = 0, Xmax = 0, Ymax = 0, Zmax = 0;
 352   double aMaxSide;
 353
 354   view3d->View()->MinMaxValues(Xmin, Ymin, Zmin, Xmax, Ymax, Zmax);
 355
 356   if (Xmin == RealFirst() || Ymin == RealFirst() || Zmin == RealFirst() || Xmax == RealLast()
 357       || Ymax == RealLast() || Zmax == RealLast())
 358     return false;
 359
 360   aMaxSide = Xmax - Xmin;
 361   if (aMaxSide < Ymax - Ymin)
 362     aMaxSide = Ymax - Ymin;
 363   if (aMaxSide < Zmax - Zmin)
 364     aMaxSide = Zmax - Zmin;
 365
 366   // IPAL21687
 367   // The boundary box of the view may be initialized but nullified
 368   // (case of infinite objects)
 369   if (aMaxSide < Precision::Confusion())
 370     return false;
 371
 372   static float EPS = (float)5.0E-3;
 373   theSize = trihedron()->Size();
 374   //theNewSize = aMaxSide*aSizeInPercents / 100.0;
 375
 376   return fabs(theNewSize - theSize) > theSize * EPS || fabs(theNewSize - theSize) > theNewSize * EPS;
 377 }
 378
 379 void XGUI_Viewer::onViewClosed(QMdiSubWindow* theView)
 380 {
 381   if ( !theView )
 382     return;
 383
 384   emit deleteView( static_cast<XGUI_ViewWindow*>(theView->widget()) );
 385   removeView( theView );
 386
 387   // if this is last view
 388   if (myViews.size() == 0) {
 389     Standard_Integer aViewsNb = 0;
 390     for ( myV3dViewer->InitActiveViews(); myV3dViewer->MoreActiveViews(); myV3dViewer->NextActiveViews())
 391       ++aViewsNb;
 392     if ( aViewsNb < 2 ) {
 393       //clean up presentations before last view is closed
 394       myAISContext->RemoveAll(Standard_False);
 395     }
 396   }
 397 }
 398
 399 /*!Remove view window \a theView from view manager.
 400  *And close the last view, if it has \a theView.
 401 */
 402 void XGUI_Viewer::removeView( QMdiSubWindow* theView )
 403 {
 404     XGUI_ViewWindow* aWindow = static_cast<XGUI_ViewWindow*>(theView->widget());
 405
 406     aWindow->disconnect( this );
 407     myViews.removeAt( myViews.indexOf( theView ) );
 408     if ( myActiveView == theView )
 409         myActiveView = 0;
 410     if ( myViews.size() == 0 )
 411         emit lastViewClosed();
 412 }
 413
 414
 415 /*void XGUI_Viewer::onViewMapped()
 416 {
 417   setTrihedronShown(true);
 418 }*/
 419
 420
 421 void XGUI_Viewer::addView(QMdiSubWindow* theView)
 422 {
 423     XGUI_ViewWindow* aWindow = dynamic_cast<XGUI_ViewWindow*>(theView->widget());
 424
 425     connect(aWindow, SIGNAL(closed(QMdiSubWindow*)),
 426             this,    SLOT(onViewClosed(QMdiSubWindow*)));
 427
 428     connect(aWindow, SIGNAL(tryClosing(XGUI_ViewWindow*)),
 429             this,    SIGNAL(tryCloseView(XGUI_ViewWindow*)));
 430
 431     connect(aWindow, SIGNAL(mousePressed(XGUI_ViewWindow*, QMouseEvent*)),
 432             this,    SLOT(onMousePressed(XGUI_ViewWindow*, QMouseEvent*)));
 433
 434     connect(aWindow, SIGNAL(mouseDoubleClicked(XGUI_ViewWindow*, QMouseEvent*)),
 435             this,    SIGNAL(mouseDoubleClick(XGUI_ViewWindow*, QMouseEvent*)));
 436
 437     connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)),
 438             this,    SIGNAL(mouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 439
 440     connect(aWindow, SIGNAL(keyPressed(XGUI_ViewWindow*, QKeyEvent*)),
 441             this,    SIGNAL(keyPress(XGUI_ViewWindow*, QKeyEvent*)));
 442
 443     connect(aWindow, SIGNAL(keyReleased(XGUI_ViewWindow*, QKeyEvent*)),
 444             this,    SIGNAL(keyRelease(XGUI_ViewWindow*, QKeyEvent*)));
 445
 446     //connect(aWindow, SIGNAL(contextMenuRequested( QContextMenuEvent* )),
 447     //        this,    SLOT  (onContextMenuRequested( QContextMenuEvent* )));
 448     //connect(aWindow, SIGNAL( contextMenuRequested(QContextMenuEvent*) ),
 449     //        this, SIGNAL( contextMenuRequested(QContextMenuEvent*) ) );
 450
 451     connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)),
 452             this, SLOT(onMouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 453
 454     connect(aWindow, SIGNAL(mouseReleased(XGUI_ViewWindow*, QMouseEvent*)),
 455             this, SLOT(onMouseReleased(XGUI_ViewWindow*, QMouseEvent*)));
 456
 457     myViews.append(theView);
 458 }
 459
 460 /*!
 461     Emit activated for view \a view.
 462 */
 463 void XGUI_Viewer::onWindowActivated(QMdiSubWindow* view)
 464 {
 465   if (view && (view != myActiveView) && (!view->isMinimized())) {
 466     qDebug("onWindowActivated");
 467     myActiveView = view;
 468     ((XGUI_ViewWindow*)myActiveView->widget())->windowActivated();
 469     QList<QMdiSubWindow*>::iterator aIt;
 470     for (aIt = myViews.begin(); aIt != myViews.end(); ++aIt) {
 471       if ((*aIt) != myActiveView) {
 472         ((XGUI_ViewWindow*)(*aIt)->widget())->windowDeactivated();
 473       }
 474     }
 475   }
 476 }
 477
 478
 479 void XGUI_Viewer::onWindowMinimized(QMdiSubWindow* theWnd)
 480 {
 481   if (myActiveView == theWnd) {
 482     myActiveView = 0;
 483     QList<QMdiSubWindow*>::iterator aIt;
 484     for (aIt = myViews.begin(); aIt != myViews.end(); ++aIt) {
 485       if (!(*aIt)->widget()->isMinimized()) {
 486         (*aIt)->raise();
 487         onWindowActivated(*aIt);
 488         break;
 489       }
 490     }
 491   }
 492 }
 493
 494 /*!
 495   SLOT: called on mouse button press, stores current mouse position as start point for transformations
 496 */
 497 void XGUI_Viewer::onMousePressed(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 498 {
 499   myStartPnt.setX(theEvent->x()); myStartPnt.setY(theEvent->y());
 500   emit mousePress(theWindow, theEvent);
 501 }
 502
 503 /*!
 504   SLOT: called on mouse move, processes hilighting
 505 */
 506 void XGUI_Viewer::onMouseMove(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 507 {
 508   if (!mySelectionEnabled) return;
 509
 510   myCurPnt.setX(theEvent->x()); myCurPnt.setY(theEvent->y());
 511   Handle(V3d_View) aView3d = theWindow->viewPort()->getView();
 512   if ( !aView3d.IsNull() ) {
 513     myAISContext->MoveTo(theEvent->x(), theEvent->y(), aView3d);
 514   }
 515 }
 516
 517 /*!
 518   SLOT: called on mouse button release, finishes selection
 519 */
 520 void XGUI_Viewer::onMouseReleased(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 521 {
 522   if (!mySelectionEnabled) return;
 523   if (theEvent->button() != Qt::LeftButton) return;
 524
 525   myEndPnt.setX(theEvent->x()); myEndPnt.setY(theEvent->y());
 526   bool aHasShift = (theEvent->modifiers() & Qt::ShiftModifier);
 527
 528   //if (!aHasShift)
 529   //  emit deselection();
 530
 531   if (myStartPnt == myEndPnt) {
 532     if (aHasShift && myMultiSelectionEnabled)
 533       myAISContext->ShiftSelect();
 534     else
 535       myAISContext->Select();
 536   } else {
 537     if (aHasShift && myMultiSelectionEnabled)
 538       myAISContext->ShiftSelect(myStartPnt.x(), myStartPnt.y(),
 539                                 myEndPnt.x(), myEndPnt.y(),
 540                                 theWindow->viewPort()->getView(), false );
 541     else
 542       myAISContext->Select(myStartPnt.x(), myStartPnt.y(),
 543                            myEndPnt.x(), myEndPnt.y(),
 544                            theWindow->viewPort()->getView(), false );
 545
 546     int Nb = myAISContext->NbSelected();
 547     if( Nb>1 && !myMultiSelectionEnabled ) {
 548       myAISContext->InitSelected();
 549       Handle( SelectMgr_EntityOwner ) anOwner = myAISContext->SelectedOwner();
 550       if( !anOwner.IsNull() ) {
 551         myAISContext->ClearSelected( Standard_False );
 552         myAISContext->AddOrRemoveSelected( anOwner, Standard_False );
 553       }
 554     }
 555
 556     myAISContext->UpdateCurrentViewer();
 557   }
 558   emit mouseRelease(theWindow, theEvent);
 559   emit selectionChanged();
 560 }
 561
 562 //******************************************************
 563 void XGUI_Viewer::setMultiSelectionEnabled(bool toEnable)
 564 {
 565   myMultiSelectionEnabled = toEnable;
 566   updateViewsDrawMode();
 567 }
 568
 569 //******************************************************
 570 void XGUI_Viewer::setSelectionEnabled(bool toEnable)
 571 {
 572   mySelectionEnabled = toEnable;
 573   updateViewsDrawMode();
 574 }
 575
 576 //******************************************************
 577 void XGUI_Viewer::updateViewsDrawMode() const
 578 {
 579   foreach(QMdiSubWindow* aWnd, myViews){
 580     XGUI_ViewWindow* aView = static_cast<XGUI_ViewWindow*>(aWnd->widget());
 581     aView->updateEnabledDrawMode();
 582   }
 583 }