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 #ifdef WIN32
  31 #include <WNT_Window.hxx>
  32 #else
  33 #include <Xw_Window.hxx>
  34 #endif
  35
  36 XGUI_Viewer::InteractionStyle2StatesMap XGUI_Viewer::myStateMap;
  37 XGUI_Viewer::InteractionStyle2ButtonsMap XGUI_Viewer::myButtonMap;
  38 static bool isInitialized = false;
  39
  40 /*!
  41  Creates viewer 3d [ static ]
  42  */
  43 Handle(V3d_Viewer) CreateViewer(const Standard_ExtString name, const Standard_CString displayName,
  44                                 const Standard_CString domain, const Standard_Real viewSize,
  45                                 const V3d_TypeOfOrientation viewProjection,
  46                                 const Standard_Boolean computedMode,
  47                                 const Standard_Boolean defaultComputedMode)
  48 {
  49   static Handle(Graphic3d_GraphicDriver) aGraphicDriver;
  50   if (aGraphicDriver.IsNull()) {
  51     Handle(Aspect_DisplayConnection) aDisplayConnection;
  52 #ifndef WIN32
  53     aDisplayConnection = new Aspect_DisplayConnection( displayName );
  54 #else
  55     aDisplayConnection = new Aspect_DisplayConnection();
  56 #endif
  57     aGraphicDriver = Graphic3d::InitGraphicDriver(aDisplayConnection);
  58   }
  59
  60   return new V3d_Viewer(aGraphicDriver, name, domain, viewSize, viewProjection, Quantity_NOC_GRAY30,
  61                         V3d_ZBUFFER, V3d_GOURAUD, V3d_WAIT, computedMode, defaultComputedMode,
  62                         V3d_TEX_NONE);
  63 }
  64
  65 // VSR: Uncomment below line to allow texture background support in OCC viewer
  66 #define OCC_ENABLE_TEXTURED_BACKGROUND
  67
  68 /*!
  69  Get data for supported background modes: gradient types, identifiers and supported image formats
  70  */
  71 QString XGUI_Viewer::backgroundData(QStringList& gradList, QIntList& idList, QIntList& txtList)
  72 {
  73   gradList << tr("Horizontal gradient") << tr("Vertical gradient") << tr("First diagonal gradient")
  74            << tr("Second diagonal gradient") << tr("First corner gradient")
  75            << tr("Second corner gradient") << tr("Third corner gradient")
  76            << tr("Fourth corner gradient");
  77   idList << XGUI::HorizontalGradient << XGUI::VerticalGradient << XGUI::Diagonal1Gradient
  78          << XGUI::Diagonal2Gradient << XGUI::Corner1Gradient << XGUI::Corner2Gradient
  79          << XGUI::Corner3Gradient << XGUI::Corner4Gradient;
  80 #ifdef OCC_ENABLE_TEXTURED_BACKGROUND
  81   txtList << XGUI::CenterTexture << XGUI::TileTexture << XGUI::StretchTexture;
  82 #endif
  83   return tr("Image files (*.bmp *.gif *.pix *.xwd *.rgb *.rs)");
  84 }
  85
  86 XGUI_Viewer::XGUI_Viewer(XGUI_MainWindow* theParent, bool DisplayTrihedron)
  87     : QObject(theParent),
  88       myMainWindow(theParent),
  89       myPreselectionEnabled(true),
  90       mySelectionEnabled(true),
  91       myMultiSelectionEnabled(true),
  92       myIsRelative(true),
  93       myInteractionStyle(XGUI::STANDARD),
  94       myTrihedronSize(100),
  95       myActiveView(0),
  96       myWndIdCount(0)
  97 {
  98   if (!isInitialized) {
  99     isInitialized = true;
 100
 101     // standard interaction style
 102     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::ControlModifier;
 103     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ZOOM] = Qt::LeftButton;
 104
 105     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::PAN] = Qt::ControlModifier;
 106     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::PAN] = Qt::MidButton;
 107
 108     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::ControlModifier;
 109     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::ROTATE] = Qt::RightButton;
 110
 111     XGUI_Viewer::myStateMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::ControlModifier;
 112     XGUI_Viewer::myButtonMap[XGUI::STANDARD][XGUI::FIT_AREA] = Qt::RightButton;
 113
 114     // "key free" interaction style
 115     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::NoModifier;
 116     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ZOOM] = Qt::RightButton;
 117
 118     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::NoModifier;
 119     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::PAN] = Qt::MidButton;
 120
 121     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::NoModifier;
 122     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::ROTATE] = Qt::LeftButton;
 123
 124     XGUI_Viewer::myStateMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoModifier;  // unused
 125     XGUI_Viewer::myButtonMap[XGUI::KEY_FREE][XGUI::FIT_AREA] = Qt::NoButton;  // unused
 126   }
 127
 128   // init CasCade viewers
 129   myV3dViewer = CreateViewer(TCollection_ExtendedString("Viewer3d").ToExtString(), "", "", 1000.0,
 130                              V3d_XposYnegZpos, Standard_True, Standard_True);
 131   myV3dViewer->SetDefaultLights();
 132
 133   // init selector
 134   myAISContext = new AIS_InteractiveContext(myV3dViewer);
 135   myAISContext->SelectionColor(Quantity_NOC_WHITE);
 136
 137   // display isoline on planar faces (box for ex.)
 138   myAISContext->IsoOnPlane(true);
 139
 140   if (DisplayTrihedron) {
 141     Handle(Geom_Axis2Placement) anAxis = new Geom_Axis2Placement(gp::XOY());
 142     myTrihedron = new AIS_Trihedron(anAxis);
 143     myTrihedron->SetInfiniteState( Standard_True);
 144
 145     Quantity_Color Col(193 / 255., 205 / 255., 193 / 255., Quantity_TOC_RGB);
 146     myTrihedron->SetArrowColor(Col.Name());
 147     myTrihedron->SetSize(myTrihedronSize);
 148     Handle(AIS_Drawer) drawer = myTrihedron->Attributes();
 149     if (drawer->HasDatumAspect()) {
 150       Handle(Prs3d_DatumAspect) daspect = drawer->DatumAspect();
 151       daspect->FirstAxisAspect()->SetColor(Quantity_Color(1.0, 0.0, 0.0, Quantity_TOC_RGB));
 152       daspect->SecondAxisAspect()->SetColor(Quantity_Color(0.0, 1.0, 0.0, Quantity_TOC_RGB));
 153       daspect->ThirdAxisAspect()->SetColor(Quantity_Color(0.0, 0.0, 1.0, Quantity_TOC_RGB));
 154     }
 155   }
 156   // set zooming style to standard
 157   //myZoomingStyle = 0;
 158
 159   QMdiArea* aMDI = myMainWindow->mdiArea();
 160   connect(aMDI, SIGNAL(subWindowActivated(QMdiSubWindow*)), this,
 161           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",
 188                                                                              "background");
 189   view->setBackground(aBk);
 190   view->updateEnabledDrawMode();
 191
 192   QMdiArea* aMDI = myMainWindow->mdiArea();
 193   QMdiSubWindow* aWnd = aMDI->addSubWindow(view, Qt::FramelessWindowHint);
 194   addView(aWnd);
 195   aWnd->setGeometry(0, 0, aMDI->width() / 2, aMDI->height() / 2);
 196   aWnd->show();
 197   aWnd->setWindowTitle(QString("Viewer #%1").arg(++myWndIdCount));
 198   emit viewCreated(view);
 199   return aWnd;
 200 }
 201
 202 void XGUI_Viewer::updateFromResources()
 203 {
 204   Qtx::BackgroundData aBk = XGUI_Preferences::resourceMgr()->backgroundValue("Viewer",
 205                                                                              "background");
 206   foreach (QMdiSubWindow* aWnd, myViews)
 207   {
 208     XGUI_ViewWindow* aView = dynamic_cast<XGUI_ViewWindow*>(aWnd->widget());
 209     if (aView)
 210       aView->setBackground(aBk);
 211   }
 212 }
 213
 214 XGUI_ViewWindow* XGUI_Viewer::activeViewWindow() const
 215 {
 216   if (myActiveView)
 217     return dynamic_cast<XGUI_ViewWindow*>(myActiveView->widget());
 218   return 0;
 219 }
 220
 221 void XGUI_Viewer::getSelectedObjects(AIS_ListOfInteractive& theList)
 222 {
 223   theList.Clear();
 224   for (myAISContext->InitSelected(); myAISContext->MoreSelected(); myAISContext->NextSelected())
 225     theList.Append(myAISContext->SelectedInteractive());
 226 }
 227
 228 void XGUI_Viewer::getSelectedShapes(NCollection_List<TopoDS_Shape>& theList)
 229 {
 230   Handle(AIS_InteractiveContext) ic = AISContext();
 231
 232   for (ic->InitSelected(); ic->MoreSelected(); ic->NextSelected()) {
 233     TopoDS_Shape aShape = ic->SelectedShape();
 234     if (!aShape.IsNull())
 235       theList.Append(aShape);
 236   }
 237 }
 238
 239 void XGUI_Viewer::setObjectsSelected(const AIS_ListOfInteractive& theList)
 240 {
 241   AIS_ListIteratorOfListOfInteractive aIt;
 242   for (aIt.Initialize(theList); aIt.More(); aIt.Next())
 243     myAISContext->AddOrRemoveSelected(aIt.Value(), false);
 244   myAISContext->UpdateCurrentViewer();
 245 }
 246
 247 /*! Sets hot button
 248  *\param theOper - hot operation
 249  *\param theState - adding state to state map operations.
 250  *\param theButton - adding state to button map operations.
 251  */
 252 void XGUI_Viewer::setHotButton(XGUI::InteractionStyle theInteractionStyle,
 253                                XGUI::HotOperation theOper, Qt::KeyboardModifiers theState,
 254                                Qt::MouseButtons theButton)
 255 {
 256   myStateMap[theInteractionStyle][theOper] = theState;
 257   myButtonMap[theInteractionStyle][theOper] = theButton;
 258 }
 259
 260 /*! Gets hot button for operation \a theOper.
 261  *\param theOper - input hot operation
 262  *\param theState - output state from state map operations.
 263  *\param theButton - output state from button map operations.
 264  */
 265 void XGUI_Viewer::getHotButton(XGUI::InteractionStyle theInteractionStyle,
 266                                XGUI::HotOperation theOper, Qt::KeyboardModifiers& theState,
 267                                Qt::MouseButtons& theButton)
 268 {
 269   theState = myStateMap[theInteractionStyle][theOper];
 270   theButton = myButtonMap[theInteractionStyle][theOper];
 271 }
 272
 273 /*!
 274  Changes visibility of trihedron to opposite
 275  */
 276 void XGUI_Viewer::toggleTrihedron()
 277 {
 278   setTrihedronShown(!isTrihedronVisible());
 279 }
 280
 281 /*!
 282  \return true if trihedron is visible
 283  */
 284 bool XGUI_Viewer::isTrihedronVisible() const
 285 {
 286   return !myTrihedron.IsNull() && !myAISContext.IsNull() && myAISContext->IsDisplayed(myTrihedron);
 287 }
 288
 289 /*!
 290  Sets visibility state of trihedron
 291  \param on - new state
 292  */
 293
 294 void XGUI_Viewer::setTrihedronShown(bool on)
 295 {
 296   if (myTrihedron.IsNull())
 297     return;
 298
 299   if (on) {
 300     myAISContext->Display(myTrihedron);
 301     myAISContext->Deactivate(myTrihedron);
 302   } else {
 303     myAISContext->Erase(myTrihedron);
 304   }
 305 }
 306
 307 /*!
 308  \return trihedron size
 309  */
 310 double XGUI_Viewer::trihedronSize() const
 311 {
 312   double sz = 0;
 313   if (!myTrihedron.IsNull())
 314     sz = myTrihedron->Size();
 315   return sz;
 316 }
 317
 318 /*!
 319  Changes trihedron size
 320  \param sz - new size
 321  */
 322 void XGUI_Viewer::setTrihedronSize(const double sz, bool isRelative)
 323 {
 324   if (myTrihedronSize != sz || isRelative != myIsRelative) {
 325     myTrihedronSize = sz;
 326     myIsRelative = isRelative;
 327     updateTrihedron();
 328   }
 329 }
 330
 331 /*!
 332  * Update the size of the trihedron
 333  */
 334 void XGUI_Viewer::updateTrihedron()
 335 {
 336   if (myTrihedron.IsNull())
 337     return;
 338
 339   if (myIsRelative) {
 340     double newSz, oldSz;
 341
 342     if (computeTrihedronSize(newSz, oldSz))
 343       myTrihedron->SetSize(newSz);
 344
 345   } else if (myTrihedron->Size() != myTrihedronSize) {
 346     myTrihedron->SetSize(myTrihedronSize);
 347   }
 348 }
 349
 350 /*!
 351  Get new and current trihedron size corresponding to the current model size
 352  */
 353 bool XGUI_Viewer::computeTrihedronSize(double& theNewSize, double& theSize)
 354 {
 355   theNewSize = 100;
 356   theSize = 100;
 357
 358   //SRN: BUG IPAL8996, a usage of method ActiveView without an initialization
 359   Handle(V3d_Viewer) viewer = v3dViewer();
 360   viewer->InitActiveViews();
 361   if (!viewer->MoreActiveViews())
 362     return false;
 363
 364   Handle(V3d_View) view3d = viewer->ActiveView();
 365   //SRN: END of fix
 366
 367   if (view3d.IsNull())
 368     return false;
 369
 370   double Xmin = 0, Ymin = 0, Zmin = 0, Xmax = 0, Ymax = 0, Zmax = 0;
 371   double aMaxSide;
 372
 373   view3d->View()->MinMaxValues(Xmin, Ymin, Zmin, Xmax, Ymax, Zmax);
 374
 375   if (Xmin == RealFirst() || Ymin == RealFirst() || Zmin == RealFirst() || Xmax == RealLast()
 376       || Ymax == RealLast() || Zmax == RealLast())
 377     return false;
 378
 379   aMaxSide = Xmax - Xmin;
 380   if (aMaxSide < Ymax - Ymin)
 381     aMaxSide = Ymax - Ymin;
 382   if (aMaxSide < Zmax - Zmin)
 383     aMaxSide = Zmax - Zmin;
 384
 385   // IPAL21687
 386   // The boundary box of the view may be initialized but nullified
 387   // (case of infinite objects)
 388   if (aMaxSide < Precision::Confusion())
 389     return false;
 390
 391   static float EPS = (float) 5.0E-3;
 392   theSize = trihedron()->Size();
 393   //theNewSize = aMaxSide*aSizeInPercents / 100.0;
 394
 395   return fabs(theNewSize - theSize) > theSize * EPS || fabs(theNewSize - theSize) > theNewSize * EPS;
 396 }
 397
 398 void XGUI_Viewer::onViewClosed(QMdiSubWindow* theView)
 399 {
 400   if (!theView)
 401     return;
 402
 403   emit deleteView(static_cast<XGUI_ViewWindow*>(theView->widget()));
 404   removeView(theView);
 405
 406   // if this is last view
 407   if (myViews.size() == 0) {
 408     Standard_Integer aViewsNb = 0;
 409     for (myV3dViewer->InitActiveViews(); myV3dViewer->MoreActiveViews();
 410         myV3dViewer->NextActiveViews())
 411       ++aViewsNb;
 412     if (aViewsNb < 2) {
 413       //clean up presentations before last view is closed
 414       myAISContext->RemoveAll(Standard_False);
 415     }
 416   }
 417 }
 418
 419 /*!Remove view window \a theView from view manager.
 420  *And close the last view, if it has \a theView.
 421  */
 422 void XGUI_Viewer::removeView(QMdiSubWindow* theView)
 423 {
 424   XGUI_ViewWindow* aWindow = static_cast<XGUI_ViewWindow*>(theView->widget());
 425
 426   aWindow->disconnect(this);
 427   myViews.removeAt(myViews.indexOf(theView));
 428   if (myActiveView == theView)
 429     myActiveView = 0;
 430   if (myViews.size() == 0)
 431     emit lastViewClosed();
 432 }
 433
 434 /*void XGUI_Viewer::onViewMapped()
 435  {
 436  setTrihedronShown(true);
 437  }*/
 438
 439 void XGUI_Viewer::addView(QMdiSubWindow* theView)
 440 {
 441   XGUI_ViewWindow* aWindow = dynamic_cast<XGUI_ViewWindow*>(theView->widget());
 442
 443   connect(aWindow, SIGNAL(closed(QMdiSubWindow*)), this, SLOT(onViewClosed(QMdiSubWindow*)));
 444
 445   connect(aWindow, SIGNAL(tryClosing(XGUI_ViewWindow*)), this,
 446           SIGNAL(tryCloseView(XGUI_ViewWindow*)));
 447
 448   connect(aWindow, SIGNAL(mousePressed(XGUI_ViewWindow*, QMouseEvent*)), this,
 449           SLOT(onMousePressed(XGUI_ViewWindow*, QMouseEvent*)));
 450
 451   connect(aWindow, SIGNAL(mouseDoubleClicked(XGUI_ViewWindow*, QMouseEvent*)), this,
 452           SIGNAL(mouseDoubleClick(XGUI_ViewWindow*, QMouseEvent*)));
 453
 454   connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)), this,
 455           SIGNAL(mouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 456
 457   connect(aWindow, SIGNAL(keyPressed(XGUI_ViewWindow*, QKeyEvent*)), this,
 458           SIGNAL(keyPress(XGUI_ViewWindow*, QKeyEvent*)));
 459
 460   connect(aWindow, SIGNAL(keyReleased(XGUI_ViewWindow*, QKeyEvent*)), this,
 461           SIGNAL(keyRelease(XGUI_ViewWindow*, QKeyEvent*)));
 462
 463   //connect(aWindow, SIGNAL(contextMenuRequested( QContextMenuEvent* )),
 464   //        this,    SLOT  (onContextMenuRequested( QContextMenuEvent* )));
 465   connect(aWindow, SIGNAL(contextMenuRequested(QContextMenuEvent*)), this,
 466           SIGNAL(contextMenuRequested(QContextMenuEvent*)));
 467
 468   connect(aWindow, SIGNAL(mouseMoving(XGUI_ViewWindow*, QMouseEvent*)), this,
 469           SLOT(onMouseMove(XGUI_ViewWindow*, QMouseEvent*)));
 470
 471   connect(aWindow, SIGNAL(mouseReleased(XGUI_ViewWindow*, QMouseEvent*)), this,
 472           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 void XGUI_Viewer::onWindowMinimized(QMdiSubWindow* theWnd)
 495 {
 496   if (myActiveView == theWnd) {
 497     myActiveView = 0;
 498     QList<QMdiSubWindow*>::iterator aIt;
 499     for (aIt = myViews.begin(); aIt != myViews.end(); ++aIt) {
 500       if (!(*aIt)->widget()->isMinimized()) {
 501         (*aIt)->raise();
 502         onWindowActivated(*aIt);
 503         break;
 504       }
 505     }
 506   }
 507 }
 508
 509 /*!
 510  SLOT: called on mouse button press, stores current mouse position as start point for transformations
 511  */
 512 void XGUI_Viewer::onMousePressed(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 513 {
 514   myStartPnt.setX(theEvent->x());
 515   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());
 525   myCurPnt.setY(theEvent->y());
 526   if (!mySelectionEnabled)
 527     return;
 528
 529   Handle(V3d_View) aView3d = theWindow->viewPort()->getView();
 530   if (!aView3d.IsNull()) {
 531     myAISContext->MoveTo(theEvent->x(), theEvent->y(), aView3d);
 532   }
 533 }
 534
 535 /*!
 536  SLOT: called on mouse button release, finishes selection
 537  */
 538 void XGUI_Viewer::onMouseReleased(XGUI_ViewWindow* theWindow, QMouseEvent* theEvent)
 539 {
 540   if (!mySelectionEnabled || theEvent->button() != Qt::LeftButton) {
 541     emit mouseRelease(theWindow, theEvent);
 542     return;
 543   }
 544
 545   myEndPnt.setX(theEvent->x());
 546   myEndPnt.setY(theEvent->y());
 547   bool aHasShift = (theEvent->modifiers() & Qt::ShiftModifier);
 548
 549   //if (!aHasShift)
 550   //  emit deselection();
 551
 552   if (myStartPnt == myEndPnt) {
 553     // the MoveTo is necessary for the second click in the same point. Otherwise the selection is lost.
 554     Handle(V3d_View) aView3d = theWindow->viewPort()->getView();
 555     if (!aView3d.IsNull()) {
 556       myAISContext->MoveTo(theEvent->x(), theEvent->y(), aView3d);
 557     }
 558     if (aHasShift && myMultiSelectionEnabled)
 559       myAISContext->ShiftSelect();
 560     else
 561       myAISContext->Select();
 562   } else {
 563     if (aHasShift && myMultiSelectionEnabled)
 564       myAISContext->ShiftSelect(myStartPnt.x(), myStartPnt.y(), myEndPnt.x(), myEndPnt.y(),
 565                                 theWindow->viewPort()->getView(), false);
 566     else
 567       myAISContext->Select(myStartPnt.x(), myStartPnt.y(), myEndPnt.x(), myEndPnt.y(),
 568                            theWindow->viewPort()->getView(), false);
 569
 570     int Nb = myAISContext->NbSelected();
 571     if (Nb > 1 && !myMultiSelectionEnabled) {
 572       myAISContext->InitSelected();
 573       Handle( SelectMgr_EntityOwner ) anOwner = myAISContext->SelectedOwner();
 574       if (!anOwner.IsNull()) {
 575         myAISContext->ClearSelected( Standard_False);
 576         myAISContext->AddOrRemoveSelected(anOwner, Standard_False);
 577       }
 578     }
 579
 580     myAISContext->UpdateCurrentViewer();
 581   }
 582   emit mouseRelease(theWindow, theEvent);
 583   emit selectionChanged();
 584 }
 585
 586 //******************************************************
 587 void XGUI_Viewer::setMultiSelectionEnabled(bool toEnable)
 588 {
 589   myMultiSelectionEnabled = toEnable;
 590   updateViewsDrawMode();
 591 }
 592
 593 //******************************************************
 594 void XGUI_Viewer::setSelectionEnabled(bool toEnable)
 595 {
 596   mySelectionEnabled = toEnable;
 597   updateViewsDrawMode();
 598 }
 599
 600 //******************************************************
 601 void XGUI_Viewer::updateViewsDrawMode() const
 602 {
 603   foreach(QMdiSubWindow* aWnd, myViews)
 604   {
 605     XGUI_ViewWindow* aView = static_cast<XGUI_ViewWindow*>(aWnd->widget());
 606     aView->updateEnabledDrawMode();
 607   }
 608 }
 609
 610 //******************************************************
 611 //void XGUI_Viewer::onContextMenuRequested(QContextMenuEvent* theEvent)
 612 //{
 613 //  XGUI_ViewWindow* aWnd = dynamic_cast<XGUI_ViewWindow*>(sender());
 614 //  if (!aWnd) return;
 615 //
 616 //  QMenu aMenu;
 617 //
 618 //  // Include Viewer actions
 619 //  if (myActions.size() > 0) {
 620 //    aMenu.addActions(myActions);
 621 //    aMenu.addSeparator();
 622 //  }
 623 //  if (aWnd->actions().size() > 0) {
 624 //    aMenu.addActions(aWnd->actions());
 625 //    aMenu.addSeparator();
 626 //  }
 627 //
 628 //  QMdiArea* aMDI = myMainWindow->mdiArea();
 629 //  if (aMenu.actions().size() > 0) {
 630 //    QMenu* aSubMenu = aMenu.addMenu(tr("Windows"));
 631 //    aSubMenu->addActions(aMDI->actions());
 632 //  } else {
 633 //    aMenu.addActions(aMDI->actions());
 634 //  }
 635 //  aMenu.exec(theEvent->globalPos());
 636 //}