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 #include "XGUI_Preferences.h"
   6
   7 #include <SUIT_ResourceMgr.h>
   8
   9 #include <QMdiArea>
  10 #include <QMdiSubWindow>
  11 #include <QApplication>
  12 #include <QMouseEvent>
  13 #include <QMenu>
  14
  15 #include <V3d_View.hxx>
  16
  17 #include <Aspect_DisplayConnection.hxx>
  18 #include <Graphic3d.hxx>
  19 #include <Graphic3d_GraphicDriver.hxx>
  20 #include <Geom_Axis2Placement.hxx>
  21 #include <AIS_Drawer.hxx>
  22 #include <Prs3d_DatumAspect.hxx>
  23 #include <Prs3d_LineAspect.hxx>
  24 #include <V3d_View.hxx>
  25 #include <Visual3d_View.hxx>
  26 #include <AIS_ListOfInteractive.hxx>
  27 #include <AIS_ListIteratorOfListOfInteractive.hxx>
  28 #include <AIS_Shape.hxx>
  29
  30
  31 #ifdef WIN32
  32 #include <WNT_Window.hxx>
  33 #else
  34 #include <Xw_Window.hxx>
  35 #endif
  36
  37 XGUI_Viewer::InteractionStyle2StatesMap XGUI_Viewer::myStateMap;
  38 XGUI_Viewer::InteractionStyle2ButtonsMap XGUI_Viewer::myButtonMap;
  39 static bool isInitialized = false;
  40
  41 /*!
  42  Creates viewer 3d [ static ]
  43  */
  44 Handle(V3d_Viewer) CreateViewer(const Standard_ExtString name, const Standard_CString displayName,
  45                                 const Standard_CString domain, const Standard_Real viewSize,
  46                                 const V3d_TypeOfOrientation viewProjection,
  47                                 const Standard_Boolean computedMode,
  48                                 const Standard_Boolean defaultComputedMode)
  49 {
  50   static Handle(Graphic3d_GraphicDriver) aGraphicDriver;
  51   if (aGraphicDriver.IsNull()) {
  52     Handle(Aspect_DisplayConnection) aDisplayConnection;
  53 #ifndef WIN32
  54     aDisplayConnection = new Aspect_DisplayConnection( displayName );
  55 #else
  56     aDisplayConnection = new Aspect_DisplayConnection();
  57 #endif
  58     aGraphicDriver = Graphic3d::InitGraphicDriver(aDisplayConnection);
  59   }
  60
  61   return new V3d_Viewer(aGraphicDriver, name, domain, viewSize, viewProjection, Quantity_NOC_GRAY30,
  62                         V3d_ZBUFFER, V3d_GOURAUD, V3d_WAIT, computedMode, defaultComputedMode,
  63                         V3d_TEX_NONE);
  64 }
  65
  66 // VSR: Uncomment below line to allow texture background support in OCC viewer
  67 #define OCC_ENABLE_TEXTURED_BACKGROUND
  68
  69 /*!
  70  Get data for supported background modes: gradient types, identifiers and supported image formats
  71  */
  72 QString XGUI_Viewer::backgroundData(QStringList& gradList, QIntList& idList, QIntList& txtList)
  73 {
  74   gradList << tr("Horizontal gradient") << tr("Vertical gradient")
  75       << tr("First diagonal gradient") << tr("Second diagonal gradient")
  76       << tr("First corner gradient") << tr("Second corner gradient")
  77       << tr("Third corner gradient") << tr("Fourth corner gradient");
  78   idList << XGUI::HorizontalGradient << XGUI::VerticalGradient << XGUI::Diagonal1Gradient
  79       << XGUI::Diagonal2Gradient << XGUI::Corner1Gradient << XGUI::Corner2Gradient
  80       << XGUI::Corner3Gradient << XGUI::Corner4Gradient;
  81 #ifdef OCC_ENABLE_TEXTURED_BACKGROUND
  82   txtList << XGUI::CenterTexture << XGUI::TileTexture << XGUI::StretchTexture;
  83 #endif
  84   return tr("Image files (*.bmp *.gif *.pix *.xwd *.rgb *.rs)");
  85 }
  86
  87 XGUI_Viewer::XGUI_Viewer(XGUI_MainWindow* theParent, bool DisplayTrihedron)
  88     : QObject(theParent),
  89     myMainWindow(theParent),
  90     myPreselectionEnabled(true),
  91     mySelectionEnabled(true),
  92     myMultiSelectionEnabled(true),
  93     myIsRelative(true),
  94     myInteractionStyle(XGUI::STANDARD),
  95     myTrihedronSize(100),
  96     myActiveView(0),
  97     myWndIdCount(0)
  98 {
  99   if (!isInitialized) {
 100     isInitialized = true;
 101
 102     // standard interaction style
 103     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::ControlModifier;
 104     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::LeftButton;
 105
 106     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::PAN] = Qt::ControlModifier;
 107     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::PAN] = Qt::MidButton;
 108
 109     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::ControlModifier;
 110     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::RightButton;
 111
 112     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::ControlModifier;
 113     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::RightButton;
 114
 115     // "key free" interaction style
 116     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::NoModifier;
 117     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::RightButton;
 118
 119     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::NoModifier;
 120     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::MidButton;
 121
 122     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::NoModifier;
 123     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::LeftButton;
 124
 125     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoModifier; // unused
 126     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoButton; // unused
 127   }
 128
 129   // init CasCade viewers
 130   myV3dViewer = CreateViewer(TCollection_ExtendedString("Viewer3d").ToExtString(), "", "", 1000.0,
 131                              V3d_XposYnegZpos, Standard_True, Standard_True);
 132   myV3dViewer->SetDefaultLights();
 133
 134   // init selector
 135   myAISContext = new AIS_InteractiveContext(myV3dViewer);
 136   myAISContext->SelectionColor(Quantity_NOC_WHITE);
 137
 138   // display isoline on planar faces (box for ex.)
 139   myAISContext->IsoOnPlane(true);
 140
 141   if (DisplayTrihedron) {
 142     Handle(Geom_Axis2Placement) anAxis = new Geom_Axis2Placement(gp::XOY());
 143     myTrihedron = new AIS_Trihedron(anAxis);
 144     myTrihedron->SetInfiniteState( Standard_True);
 145
 146     Quantity_Color Col(193 / 255., 205 / 255., 193 / 255., Quantity_TOC_RGB);
 147     myTrihedron->SetArrowColor(Col.Name());
 148     myTrihedron->SetSize(myTrihedronSize);
 149     Handle(AIS_Drawer) drawer = myTrihedron->Attributes();
 150     if (drawer->HasDatumAspect()) {
 151       Handle(Prs3d_DatumAspect) daspect = drawer->DatumAspect();
 152       daspect->FirstAxisAspect()->SetColor(Quantity_Color(1.0, 0.0, 0.0, Quantity_TOC_RGB));
 153       daspect->SecondAxisAspect()->SetColor(Quantity_Color(0.0, 1.0, 0.0, Quantity_TOC_RGB));
 154       daspect->ThirdAxisAspect()->SetColor(Quantity_Color(0.0, 0.0, 1.0, Quantity_TOC_RGB));
 155     }
 156   }
 157   // set zooming style to standard
 158   //myZoomingStyle = 0;
 159
 160   QMdiArea* aMDI = myMainWindow->mdiArea();
 161   connect(aMDI, SIGNAL(subWindowActivated(QMdiSubWindow*)), this, SLOT(onWindowActivated(QMdiSubWindow*)));
 162
 163 }
 164
 165 XGUI_Viewer::~XGUI_Viewer(void)
 166 {
 167   myAISContext.Nullify();
 168   myV3dViewer.Nullify();
 169 }
 170
 171 QMdiSubWindow* XGUI_Viewer::createView(V3d_TypeOfView theType)
 172 {
 173   // create view frame
 174   XGUI_ViewWindow* view = new XGUI_ViewWindow(this, theType);
 175   // get main view window (created by view frame)
 176   //OCCViewer_ViewWindow* vw = view->getView(OCCViewer_ViewFrame::MAIN_VIEW);
 177   // initialize main view window
 178   //initView( vw );
 179   // set default background for view window
 180   //vw->setBackground( background(0) ); // 0 means MAIN_VIEW (other views are not yet created here)
 181   // connect signal from viewport
 182   //connect(view->viewPort(), SIGNAL(vpClosed()), this, SLOT(onViewClosed()));
 183     //connect(view->viewPort(), SIGNAL(vpMapped()), this, SLOT(onViewMapped()));
 184   if (myViews.size() == 0)
 185     setTrihedronShown(true);
 186
 187   Qtx::BackgroundData aBk = XGUI_Preferences::resourceMgr()->backgroundValue("Viewer", "background");
 188   view->setBackground(aBk);
 189   view->updateEnabledDrawMode();
 190
 191   QMdiArea* aMDI = myMainWindow->mdiArea();
 192   QMdiSubWindow* aWnd = aMDI->addSubWindow(view, Qt::FramelessWindowHint);
 193   addView(aWnd);
 194   aWnd->setGeometry(0, 0, aMDI->width() / 2, aMDI->height() / 2);
 195   aWnd->show();
 196   aWnd->setWindowTitle(QString("Viewer #%1").arg(++myWndIdCount));
 197   emit viewCreated(view);
 198   return aWnd;
 199 }
 200
 201 void XGUI_Viewer::updateFromResources()
 202 {
 203   Qtx::BackgroundData aBk = XGUI_Preferences::resourceMgr()->backgroundValue("Viewer", "background");
 204   foreach (QMdiSubWindow* aWnd, myViews) {
 205     XGUI_ViewWindow* aView = dynamic_cast<XGUI_ViewWindow*>(aWnd->widget());
 206     if (aView)
 207       aView->setBackground(aBk);
 208   }
 209 }
 210
 211
 212 XGUI_ViewWindow* XGUI_Viewer::activeViewWindow() const
 213 {
 214   if (myActiveView)
 215     return dynamic_cast<XGUI_ViewWindow*>(myActiveView->widget());
 216   return 0;
 217 }
 218
 219 void XGUI_Viewer::getSelectedObjects(AIS_ListOfInteractive& theList)
 220 {
 221   theList.Clear();
 222   for (myAISContext->InitSelected(); myAISContext->MoreSelected(); myAISContext->NextSelected())
 223     theList.Append(myAISContext->SelectedInteractive());
 224 }
 225
 226 void XGUI_Viewer::getSelectedShapes(NCollection_List<TopoDS_Shape>& theList)
 227 {
 228   Handle(AIS_InteractiveContext) ic = AISContext();
 229
 230   for (ic->InitSelected(); ic->MoreSelected(); ic->NextSelected()) {
 231     TopoDS_Shape aShape = ic->SelectedShape();
 232     if (!aShape.IsNull())
 233       theList.Append(aShape);
 234   }
 235 }
 236
 237 void XGUI_Viewer::setObjectsSelected(const AIS_ListOfInteractive& theList)
 238 {
 239   AIS_ListIteratorOfListOfInteractive aIt;
 240   for (aIt.Initialize(theList); aIt.More(); aIt.Next())
 241     myAISContext->AddOrRemoveSelected(aIt.Value(), false);
 242   myAISContext->UpdateCurrentViewer();
 243 }
 244
 245 /*! Sets hot button
 246  *\param theOper - hot operation
 247  *\param theState - adding state to state map operations.
 248  *\param theButton - adding state to button map operations.
 249  */
 250 void XGUI_Viewer::setHotButton(XGUI::InteractionStyle theInteractionStyle,
 251                                XGUI::HotOperation theOper, Qt::KeyboardModifiers theState,
 252                                Qt::MouseButtons theButton)
 253 {
 254   myStateMap[theInteractionStyle][theOper] = theState;
 255   myButtonMap[theInteractionStyle][theOper] = theButton;
 256 }
 257
 258 /*! Gets hot button for operation \a theOper.
 259  *\param theOper - input hot operation
 260  *\param theState - output state from state map operations.
 261  *\param theButton - output state from button map operations.
 262  */
 263 void XGUI_Viewer::getHotButton(XGUI::InteractionStyle theInteractionStyle,
 264                                XGUI::HotOperation theOper, Qt::KeyboardModifiers& theState,
 265                                Qt::MouseButtons& theButton)
 266 {
 267   theState = myStateMap[theInteractionStyle][theOper];
 268   theButton = myButtonMap[theInteractionStyle][theOper];
 269 }
 270
 271 /*!
 272  Changes visibility of trihedron to opposite
 273  */
 274 void XGUI_Viewer::toggleTrihedron()
 275 {
 276   setTrihedronShown(!isTrihedronVisible());
 277 }
 278
 279 /*!
 280  \return true if trihedron is visible
 281  */
 282 bool XGUI_Viewer::isTrihedronVisible() const
 283 {
 284   return !myTrihedron.IsNull() && !myAISContext.IsNull() && myAISContext->IsDisplayed(myTrihedron);
 285 }
 286
 287 /*!
 288  Sets visibility state of trihedron
 289  \param on - new state
 290  */
 291
 292 void XGUI_Viewer::setTrihedronShown(bool on)
 293 {
 294   if (myTrihedron.IsNull())
 295     return;
 296
 297   if (on) {
 298     myAISContext->Display(myTrihedron);
 299     myAISContext->Deactivate(myTrihedron);
 300   } else {
 301     myAISContext->Erase(myTrihedron);
 302   }
 303 }
 304
 305 /*!
 306  \return trihedron size
 307  */
 308 double XGUI_Viewer::trihedronSize() const
 309 {
 310   double sz = 0;
 311   if (!myTrihedron.IsNull())
 312     sz = myTrihedron->Size();
 313   return sz;
 314 }
 315
 316 /*!
 317  Changes trihedron size
 318  \param sz - new size
 319  */
 320 void XGUI_Viewer::setTrihedronSize(const double sz, bool isRelative)
 321 {
 322   if (myTrihedronSize != sz || isRelative != myIsRelative) {
 323     myTrihedronSize = sz;
 324     myIsRelative = isRelative;
 325     updateTrihedron();
 326   }
 327 }
 328
 329 /*!
 330  * Update the size of the trihedron
 331  */
 332 void XGUI_Viewer::updateTrihedron()
 333 {
 334   if (myTrihedron.IsNull())
 335     return;
 336
 337   if (myIsRelative) {
 338     double newSz, oldSz;
 339
 340     if (computeTrihedronSize(newSz, oldSz))
 341       myTrihedron->SetSize(newSz);
 342
 343   } else if (myTrihedron->Size() != myTrihedronSize) {
 344     myTrihedron->SetSize(myTrihedronSize);
 345   }
 346 }
 347
 348 /*!
 349  Get new and current trihedron size corresponding to the current model size
 350  */
 351 bool XGUI_Viewer::computeTrihedronSize(double& theNewSize, double& theSize)
 352 {
 353   theNewSize = 100;
 354   theSize = 100;
 355
 356   //SRN: BUG IPAL8996, a usage of method ActiveView without an initialization
 357   Handle(V3d_Viewer) viewer = v3dViewer();
 358   viewer->InitActiveViews();
 359   if (!viewer->MoreActiveViews())
 360     return false;
 361
 362   Handle(V3d_View) view3d = viewer->ActiveView();
 363   //SRN: END of fix
 364
 365   if (view3d.IsNull())
 366     return false;
 367
 368   double Xmin = 0, Ymin = 0, Zmin = 0, Xmax = 0, Ymax = 0, Zmax = 0;
 369   double aMaxSide;
 370
 371   view3d->View()->MinMaxValues(Xmin, Ymin, Zmin, Xmax, Ymax, Zmax);
 372
 373   if (Xmin == RealFirst() || Ymin == RealFirst() || Zmin == RealFirst() || Xmax == RealLast()
 374       || Ymax == RealLast() || Zmax == RealLast())
 375     return false;
 376
 377   aMaxSide = Xmax - Xmin;
 378   if (aMaxSide < Ymax - Ymin)
 379     aMaxSide = Ymax - Ymin;
 380   if (aMaxSide < Zmax - Zmin)
 381     aMaxSide = Zmax - Zmin;
 382
 383   // IPAL21687
 384   // The boundary box of the view may be initialized but nullified
 385   // (case of infinite objects)
 386   if (aMaxSide < Precision::Confusion())
 387     return false;
 388
 389   static float EPS = (float)5.0E-3;
 390   theSize = trihedron()->Size();
 391   //theNewSize = aMaxSide*aSizeInPercents / 100.0;
 392
 393   return fabs(theNewSize - theSize) > theSize * EPS || fabs(theNewSize - theSize) > theNewSize * EPS;
 394 }
 395
 396 void XGUI_Viewer::onViewClosed(QMdiSubWindow* theView)
 397 {
 398   if ( !theView )
 399     return;
 400
 401   emit deleteView( static_cast<XGUI_ViewWindow*>(theView->widget()) );
 402   removeView( theView );
 403
 404   // if this is last view
 405   if (myViews.size() == 0) {
 406     Standard_Integer aViewsNb = 0;
 407     for ( myV3dViewer->InitActiveViews(); myV3dViewer->MoreActiveViews(); myV3dViewer->NextActiveViews())
 408       ++aViewsNb;
 409     if ( aViewsNb < 2 ) {
 410       //clean up presentations before last view is closed
 411       myAISContext->RemoveAll(Standard_False);
 412     }
 413   }
 414 }
 415
 416 /*!Remove view window \a theView from view manager.
 417  *And close the last view, if it has \a theView.
 418 */
 419 void XGUI_Viewer::removeView( QMdiSubWindow* theView )
 420 {
 421     XGUI_ViewWindow* aWindow = static_cast<XGUI_ViewWindow*>(theView->widget());
 422
 423     aWindow->disconnect( this );
 424     myViews.removeAt( myViews.indexOf( theView ) );
 425     if ( myActiveView == theView )
 426         myActiveView = 0;
 427     if ( myViews.size() == 0 )
 428         emit lastViewClosed();
 429 }
 430
 431
 432 /*void XGUI_Viewer::onViewMapped()
 433 {
 434   setTrihedronShown(true);
 435 }*/
 436
 437
 438 void XGUI_Viewer::addView(QMdiSubWindow* theView)
 439 {
 440     XGUI_ViewWindow* aWindow = dynamic_cast<XGUI_ViewWindow*>(theView->widget());
 441
 442     connect(aWindow, SIGNAL(closed(QMdiSubWindow*)),
 443             this,    SLOT(onViewClosed(QMdiSubWindow*)));
 444
 445     connect(aWindow, SIGNAL(tryClosing(XGUI_ViewWindow*)),
 446             this,    SIGNAL(tryCloseView(XGUI_ViewWindow*)));
 447
 448     connect(aWindow, SIGNAL(mousePressed(XGUI_ViewWindow*, QMouseEvent*)),
 449             this,    SLOT(onMousePressed(XGUI_ViewWindow*, QMouseEvent*)));
 450
 451     connect(aWindow, SIGNAL(mouseDoubleClicked(XGUI_ViewWindow*, QMouseEvent*)),
 452             this,    SIGNAL(mouseDoubleClick(XGUI_ViewWindow*, QMouseEvent*)));
 453
 454     connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)),
 455             this,    SIGNAL(mouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 456
 457     connect(aWindow, SIGNAL(keyPressed(XGUI_ViewWindow*, QKeyEvent*)),
 458             this,    SIGNAL(keyPress(XGUI_ViewWindow*, QKeyEvent*)));
 459
 460     connect(aWindow, SIGNAL(keyReleased(XGUI_ViewWindow*, QKeyEvent*)),
 461             this,    SIGNAL(keyRelease(XGUI_ViewWindow*, QKeyEvent*)));
 462
 463     //connect(aWindow, SIGNAL(contextMenuRequested( QContextMenuEvent* )),
 464     //        this,    SLOT  (onContextMenuRequested( QContextMenuEvent* )));
 465     connect(aWindow, SIGNAL( contextMenuRequested(QContextMenuEvent*) ),
 466             this, SIGNAL( contextMenuRequested(QContextMenuEvent*) ) );
 467
 468     connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)),
 469             this, SLOT(onMouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 470
 471     connect(aWindow, SIGNAL(mouseReleased(XGUI_ViewWindow*, QMouseEvent*)),
 472             this, SLOT(onMouseReleased(XGUI_ViewWindow*, QMouseEvent*)));
 473
 474     myViews.append(theView);
 475 }
 476
 477 /*!
 478     Emit activated for view \a view.
 479 */
 480 void XGUI_Viewer::onWindowActivated(QMdiSubWindow* view)
 481 {
 482   if (view && (view != myActiveView) && (!view->isMinimized())) {
 483     myActiveView = view;
 484     ((XGUI_ViewWindow*)myActiveView->widget())->windowActivated();
 485     QList<QMdiSubWindow*>::iterator aIt;
 486     for (aIt = myViews.begin(); aIt != myViews.end(); ++aIt) {
 487       if ((*aIt) != myActiveView) {
 488         ((XGUI_ViewWindow*)(*aIt)->widget())->windowDeactivated();
 489       }
 490     }
 491   }
 492 }
 493
 494
 495 void XGUI_Viewer::onWindowMinimized(QMdiSubWindow* theWnd)
 496 {
 497   if (myActiveView == theWnd) {
 498     myActiveView = 0;
 499     QList<QMdiSubWindow*>::iterator aIt;
 500     for (aIt = myViews.begin(); aIt != myViews.end(); ++aIt) {
 501       if (!(*aIt)->widget()->isMinimized()) {
 502         (*aIt)->raise();
 503         onWindowActivated(*aIt);
 504         break;
 505       }
 506     }
 507   }
 508 }
 509
 510 /*!
 511   SLOT: called on mouse button press, stores current mouse position as start point for transformations
 512 */
 513 void XGUI_Viewer::onMousePressed(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 514 {
 515   myStartPnt.setX(theEvent->x()); myStartPnt.setY(theEvent->y());
 516   emit mousePress(theWindow, theEvent);
 517 }
 518
 519 /*!
 520   SLOT: called on mouse move, processes hilighting
 521 */
 522 void XGUI_Viewer::onMouseMove(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 523 {
 524   myCurPnt.setX(theEvent->x()); myCurPnt.setY(theEvent->y());
 525   if (!mySelectionEnabled) return;
 526
 527   Handle(V3d_View) aView3d = theWindow->viewPort()->getView();
 528   if ( !aView3d.IsNull() ) {
 529     myAISContext->MoveTo(theEvent->x(), theEvent->y(), aView3d);
 530   }
 531 }
 532
 533 /*!
 534   SLOT: called on mouse button release, finishes selection
 535 */
 536 void XGUI_Viewer::onMouseReleased(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 537 {
 538   if (!mySelectionEnabled || theEvent->button() != Qt::LeftButton) {
 539     emit mouseRelease(theWindow, theEvent);
 540     return;
 541   }
 542
 543   myEndPnt.setX(theEvent->x()); myEndPnt.setY(theEvent->y());
 544   bool aHasShift = (theEvent->modifiers() & Qt::ShiftModifier);
 545
 546   //if (!aHasShift)
 547   //  emit deselection();
 548
 549   if (myStartPnt == myEndPnt) {
 550     // the MoveTo is necessary for the second click in the same point. Otherwise the selection is lost.
 551     Handle(V3d_View) aView3d = theWindow->viewPort()->getView();
 552     if ( !aView3d.IsNull() ) {
 553       myAISContext->MoveTo(theEvent->x(), theEvent->y(), aView3d);
 554     }
 555     if (aHasShift && myMultiSelectionEnabled)
 556       myAISContext->ShiftSelect();
 557     else
 558       myAISContext->Select();
 559   } else {
 560     if (aHasShift && myMultiSelectionEnabled)
 561       myAISContext->ShiftSelect(myStartPnt.x(), myStartPnt.y(),
 562                                 myEndPnt.x(), myEndPnt.y(),
 563                                 theWindow->viewPort()->getView(), false );
 564     else
 565       myAISContext->Select(myStartPnt.x(), myStartPnt.y(),
 566                            myEndPnt.x(), myEndPnt.y(),
 567                            theWindow->viewPort()->getView(), false );
 568
 569     int Nb = myAISContext->NbSelected();
 570     if( Nb>1 && !myMultiSelectionEnabled ) {
 571       myAISContext->InitSelected();
 572       Handle( SelectMgr_EntityOwner ) anOwner = myAISContext->SelectedOwner();
 573       if( !anOwner.IsNull() ) {
 574         myAISContext->ClearSelected( Standard_False );
 575         myAISContext->AddOrRemoveSelected( anOwner, Standard_False );
 576       }
 577     }
 578
 579     myAISContext->UpdateCurrentViewer();
 580   }
 581   emit mouseRelease(theWindow, theEvent);
 582   emit selectionChanged();
 583 }
 584
 585 //******************************************************
 586 void XGUI_Viewer::setMultiSelectionEnabled(bool toEnable)
 587 {
 588   myMultiSelectionEnabled = toEnable;
 589   updateViewsDrawMode();
 590 }
 591
 592 //******************************************************
 593 void XGUI_Viewer::setSelectionEnabled(bool toEnable)
 594 {
 595   mySelectionEnabled = toEnable;
 596   updateViewsDrawMode();
 597 }
 598
 599 //******************************************************
 600 void XGUI_Viewer::updateViewsDrawMode() const
 601 {
 602   foreach(QMdiSubWindow* aWnd, myViews){
 603     XGUI_ViewWindow* aView = static_cast<XGUI_ViewWindow*>(aWnd->widget());
 604     aView->updateEnabledDrawMode();
 605   }
 606 }
 607
 608 //******************************************************
 609 //void XGUI_Viewer::onContextMenuRequested(QContextMenuEvent* theEvent)
 610 //{
 611 //  XGUI_ViewWindow* aWnd = dynamic_cast<XGUI_ViewWindow*>(sender());
 612 //  if (!aWnd) return;
 613 //
 614 //  QMenu aMenu;
 615 //
 616 //  // Include Viewer actions
 617 //  if (myActions.size() > 0) {
 618 //    aMenu.addActions(myActions);
 619 //    aMenu.addSeparator();
 620 //  }
 621 //  if (aWnd->actions().size() > 0) {
 622 //    aMenu.addActions(aWnd->actions());
 623 //    aMenu.addSeparator();
 624 //  }
 625 //
 626 //  QMdiArea* aMDI = myMainWindow->mdiArea();
 627 //  if (aMenu.actions().size() > 0) {
 628 //    QMenu* aSubMenu = aMenu.addMenu(tr("Windows"));
 629 //    aSubMenu->addActions(aMDI->actions());
 630 //  } else {
 631 //    aMenu.addActions(aMDI->actions());
 632 //  }
 633 //  aMenu.exec(theEvent->globalPos());
 634 //}