Core.cc

/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
*      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen       *
*                           www.openflipper.org                              *
*                                                                            *
*--------------------------------------------------------------------------- *
*  This file is part of OpenFlipper.                                         *
*                                                                            *
*  OpenFlipper is free software: you can redistribute it and/or modify       *
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*  or inline functions from this file, or you compile this file and          *
*  link it with other files to produce an executable, this file does         *
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*  covered by the GNU Lesser General Public License.                         *
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*  OpenFlipper is distributed in the hope that it will be useful,            *
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*  You should have received a copy of the GNU LesserGeneral Public           *
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*  see <http://www.gnu.org/licenses/>.                                       *
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\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/





//=============================================================================
//
//  CLASS Core - IMPLEMENTATION
//
//=============================================================================


//== INCLUDES =================================================================

// -------------------- mview
#include "Core.hh"
// -------------------- ACG
#include <ACG/Scenegraph/DrawModes.hh>
#include <ACG/Scenegraph/SceneGraph.hh>

#include <ACG/QtWidgets/QtFileDialog.hh>
// -------------------- Qt

#include <QKeyEvent>
#include <QSplitter>
#include <QMenuBar>
#include <QToolBox>
#include <QApplication>
#include <QStatusBar>
#include <QMessageBox>
#include <QFile>
#include <QSettings>

#include <QPluginLoader>
#include "OpenFlipper/BasePlugin/BaseInterface.hh"
#include "OpenFlipper/BasePlugin/KeyInterface.hh"
#include "OpenFlipper/BasePlugin/MouseInterface.hh"
#include "OpenFlipper/BasePlugin/PickingInterface.hh"
#include "OpenFlipper/BasePlugin/ToolboxInterface.hh"
#include "OpenFlipper/BasePlugin/TextureInterface.hh"
#include "OpenFlipper/BasePlugin/MenuInterface.hh"
#include "OpenFlipper/BasePlugin/INIInterface.hh"

#include "OpenFlipper/INIFile/INIFile.hh"

#include "OpenFlipper/common/GlobalOptions.hh"
#include <OpenFlipper/common/RecentFiles.hh>
#include <OpenFlipper/ACGHelper/DrawModeConverter.hh>

#include <QStringList>
#include <QtScript/QScriptValueIterator>

#include <ACG/Scenegraph/SeparatorNode.hh>

#include "OpenFlipper/BasePlugin/PluginFunctions.hh"
#include "OpenFlipper/BasePlugin/PluginFunctionsCore.hh"

#include "OpenFlipper/BasePlugin/RPCWrappers.hh"

#include <OpenMesh/Core/System/omstream.hh>

#include <OpenFlipper/common/BaseObjectCore.hh>
#include <OpenFlipper/common/TypesInternal.hh>

#include <OpenFlipper/common/RendererInfo.hh>

#define WIDGET_HEIGHT 800
#define WIDGET_WIDTH  800

//== IMPLEMENTATION ==========================================================

/** \brief Constuctor for the Core Widget ( This is stage 1 , call init for stage 2)
 *
 * Initialization is working the following way:\n
 * - Setup basic paths \n
 * - Get Options from Option files ( While skipping the OpenFiles Sections as Core is not running )\n
 * - Jump back ( Stage two is done by calling init from main ) so CALL init!!
 * - This Two stage system allows using commandline options which override Option Files
*/
Core::
Core() :
  QObject(),
  capture_(false),
  processManager_(0),
  nextBackupId_(0),
  nextBackupGroupId_(0),
  objectRoot_(0),
  coreWidget_(0)
{

  //init logFile
  logStream_ = 0;
  logFile_ = 0;

  //init nodes
  root_node_scenegraph_ = new ACG::SceneGraph::SeparatorNode(0, "SceneGraph Root Node");
  
  // init global data node
  root_node_scenegraph_global_ = new ACG::SceneGraph::SeparatorNode(root_node_scenegraph_ , "SceneGraph Rendered Root Node");
  
  // This separator will manage the cores nodes
  core_nodes_ = new ACG::SceneGraph::SeparatorNode(root_node_scenegraph_global_, "Core Nodes");
  
  // Coordsys rendering nodes
  coordsysMaterialNode_ = new ACG::SceneGraph::MaterialNode(core_nodes_,"Coordsys Material Node");
  coordsysNode_ = new ACG::SceneGraph::CoordsysNode(coordsysMaterialNode_,"Core Coordsys Node");  
  coordsysNode_->setTraverseMode (BaseNode::NodeFirst | BaseNode::SecondPass);
  
  // Separator handling the nodes for data
  dataSeparatorNode_ = new ACG::SceneGraph::SeparatorNode(root_node_scenegraph_global_, "Data Separator Root Node");
  
  // Separator handling the nodes for data
  dataRootNode_      = new ACG::SceneGraph::SeparatorNode(dataSeparatorNode_, "Data Root Node");

   // Add ViewMode All
  ViewMode* vm = new ViewMode();
  vm->name = "All";
  vm->icon = "viewmode_all.png";
  vm->custom = false;
  vm->visibleToolboxes = QStringList();

  viewModes_.push_front(vm);

  //init ViewerProperties (always for 4 Viewers!)
  std::vector< Viewer::ViewerProperties* > viewerProperties;

  for (int i=0; i < 4; i++) {
    Viewer::ViewerProperties* viewerProperty = new Viewer::ViewerProperties(i);
    viewerProperty->snapshotBaseFileName("snap-Viewer-" + QString::number(i) + ".png");
    viewerProperties.push_back( viewerProperty );
  }

  PluginFunctions::setViewerProperties(viewerProperties);

  //set viewer defaults
  OpenFlipper::Options::defaultViewingDirection( PluginFunctions::VIEW_FREE,  0 );
  OpenFlipper::Options::defaultViewingDirection( PluginFunctions::VIEW_TOP,   1 );
  OpenFlipper::Options::defaultViewingDirection( PluginFunctions::VIEW_LEFT,  2 );
  OpenFlipper::Options::defaultViewingDirection( PluginFunctions::VIEW_FRONT, 3 );

  // Get all relevant Paths and Options from option files
  setupOptions();

  // set discriptions for scriptable slots
  setDescriptions();
  
  // Initialize the build in dataTypes
  initializeTypes();
  
  // Initialize the build in updateTypes
  initializeUpdateTypes();
}

/** \brief Second initialization stage
 *
 * This Stage does the following :\n
 * - Create the Core GUI Elements (Examiner, Toolbox,...)\n
 * - Create the MenuBar \n
 * - load the Plugins \n
 * - connect the Mouse slots \n
 * - Load all ini files (This includes the Global Option files) \n
 */
void
Core::init() {
  
  // Check library versions
  checkLibraryVersions();

  // Make root_node available to the plugins ( defined in PluginFunctions.hh)
  PluginFunctions::setDataSeparatorNodes( dataSeparatorNode_ );

  // Topmost node of the scenegraph
  PluginFunctions::setSceneGraphRootNode( root_node_scenegraph_ );
  
  // Node below the global status nodes. All nodes with global rendering
  // will be attached here.
  PluginFunctions::setSceneGraphRootNodeGlobal(root_node_scenegraph_global_);

  // Initialize the first object as the root Object for the object tree
  objectRoot_ =  dynamic_cast< BaseObject* > ( new GroupObject("ObjectRoot") );
  PluginFunctions::setDataRoot( objectRoot_ );
  
  // Bring up the object manager ( has to be done after the rootobject is created)
  connect(getObjectManager(),SIGNAL(newObject(int)), this ,SLOT(newObject(int)));
  
  connect(getObjectManager(),SIGNAL(deletedObject(int)), this ,SLOT(deletedObject(int)));

  if ( OpenFlipper::Options::gui() ) {

    // Initialize redraw timer. Will be used to restrict the rendering framerate.
    redrawTimer_ = new QTimer();
    redrawTimer_->setSingleShot(true);
    connect(redrawTimer_, SIGNAL(timeout()), this, SLOT(updateView()),Qt::DirectConnection);

    // Initialice scenegraph check timer. Will be used to check for changes in the scenegraph
    scenegraphCheckTimer_ = new QTimer();
    scenegraphCheckTimer_->setSingleShot(false);
    connect(scenegraphCheckTimer_, SIGNAL(timeout()), this, SLOT(checkScenegraphDirty()),Qt::DirectConnection);

    // Will measure the time between redraws
    redrawTime_ = new QTime();
    redrawTime_->start ();

    if ( OpenFlipperSettings().value("Core/Gui/splash",true).toBool() ) {
      QPixmap splashPixmap(OpenFlipper::Options::iconDirStr() + OpenFlipper::Options::dirSeparator() + "splash.png");

      splash_ = new QSplashScreen(splashPixmap, Qt::SplashScreen | Qt::WindowStaysOnTopHint);
      splash_->show();

      splash_->showMessage(tr("Initializing mainwindow") ,
                          Qt::AlignBottom | Qt::AlignLeft , Qt::white);
    }

    coreWidget_ = new CoreWidget(viewModes_ , plugins_, coreSlots_);

    spinBoxEventFilter_.registerScrollArea(coreWidget_->getToolboxScrollArea());
    spinBoxEventFilter_.registerScrollArea(coreWidget_->getToolboxArea());
    spinBoxEventFilter_.registerScrollArea(coreWidget_->getToolbox());

    connect(coreWidget_, SIGNAL(clearAll())           , this, SLOT(clearAll()));
    connect(coreWidget_, SIGNAL(loadMenu())           , this, SLOT(loadObject()));
    connect(coreWidget_, SIGNAL(addEmptyObjectMenu()) , this, SLOT(slotAddEmptyObjectMenu()));
    connect(coreWidget_, SIGNAL(saveMenu())           , this, SLOT(saveAllObjects()));
    connect(coreWidget_, SIGNAL(saveToMenu())         , this, SLOT(saveAllObjectsTo()));
    connect(coreWidget_, SIGNAL(loadIniMenu())        , this, SLOT(loadSettings()));
    connect(coreWidget_, SIGNAL(saveIniMenu())        , this, SLOT(saveSettings()));
    connect(coreWidget_, SIGNAL(applyOptions())       , this, SLOT(applyOptions()));
    connect(coreWidget_, SIGNAL(saveOptions())        , this, SLOT(saveOptions()));
    connect(coreWidget_, SIGNAL(recentOpen(QAction*)) , this, SLOT(slotRecentOpen(QAction*)));
    connect(coreWidget_, SIGNAL(exit())               , this, SLOT(slotExit()));


    connect( coreWidget_, SIGNAL( resizeViewers(int,int) ), this, SLOT( resizeViewers(int,int) ) );
    connect( coreWidget_, SIGNAL( resizeApplication(int,int) ), this, SLOT( resizeApplication(int,int) ) );
    connect( coreWidget_, SIGNAL( stopVideoCapture() ), this, SLOT( stopVideoCapture() ) );
    connect( coreWidget_, SIGNAL( startVideoCapture(QString,int,bool) ), this, SLOT( startVideoCapture(QString,int,bool) ) );
    connect( coreWidget_, SIGNAL( dragOpenFile(QString)), this, SLOT(loadObject(QString)));

    connect(coreWidget_, SIGNAL(showPlugins())       , this, SLOT(slotShowPlugins()));

    connect(coreWidget_, SIGNAL(call(QString,bool&)), this, SLOT(slotCall(QString,bool&)));
    
    connect( coreWidget_->logWidget_->openMeshFilterAction_,SIGNAL(toggled(bool)), this, SLOT(enableOpenMeshErrorLog(bool)) );

    QRect rect = QApplication::desktop()->screenGeometry();

    uint width = rect.width();
    if ( width > 1000 ) {
      width = 1000;
    }

    uint height = rect.height();
    if ( height > 1000 ) {
      height = 1000;
    }

#ifdef ARCH_DARWIN
    width = rect.width() - 300;
    height = rect.height() - 150;

//     coreWidget_->setMaximumSize( width, height  );
#endif

    coreWidget_->resize(width,height);

    #ifdef DEBUG
      coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() + " [DEBUG]" );
    #else
      coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() );
    #endif

    // Sanity check for OpenGL capabilities!
    checkOpenGLCapabilities();

  }

  // ======================================================================
  // Create intermediate logger class for Core which will mangle the output
  // ======================================================================
  PluginLogger* newlog = new PluginLogger("Core");

  loggers_.push_back(newlog);
  connect(this,SIGNAL(log(Logtype, QString )),newlog,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
  connect(this,SIGNAL(log(QString )),newlog,SLOT(slotLog(QString )),Qt::DirectConnection);

  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);

  // ======================================================================
  // Create a logger class for CoreWidget
  // ======================================================================

  if ( OpenFlipper::Options::gui() ){
    PluginLogger* widgetlog = new PluginLogger("CoreWidget");

    loggers_.push_back(widgetlog);
    connect(coreWidget_,SIGNAL(log(Logtype, QString )),widgetlog,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
    connect(coreWidget_,SIGNAL(log(QString )),widgetlog,SLOT(slotLog(QString )),Qt::DirectConnection);

    // Connect it to the Master logger
    connect(widgetlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
    connect(widgetlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
    // connection to file logger
    connect(widgetlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
  }

  // ======================================================================
  // Catch OpenMesh Error logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGERR);
  omerr().connect(*newlog);
  omerr().disconnect(std::cerr);

  loggers_.push_back(newlog);

  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);

  // ======================================================================
  // Catch OpenMesh omout logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGINFO);
  omout().connect(*newlog);
  omout().disconnect(std::cout);

  loggers_.push_back(newlog);

  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);

  // ======================================================================
  // Catch OpenMesh omlog logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGOUT);
  omlog().connect(*newlog);

  loggers_.push_back(newlog);

  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);

  // ======================================================================
  // Log Scripting stuff through a separate logger
  // ======================================================================
  newlog = new PluginLogger("Scripting",LOGOUT);

  loggers_.push_back(newlog);

  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);

  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);

  // connect signal to logger
  connect(this,SIGNAL(scriptLog(QString )),newlog,SLOT(slotLog(QString )),Qt::DirectConnection);

  
  // ======================================================================
  // Set up QtScript Environment
  // ======================================================================
  
  // Set a reference to the scriptengine for simple rpc calls
  RPC::setScriptEngine(&scriptEngine_);

  connect(&scriptEngine_, SIGNAL( signalHandlerException(const QScriptValue &) ), this, SLOT( slotScriptError(const QScriptValue &) ));

  // process Events every 500 msecs during script execution
  scriptEngine_.setProcessEventsInterval( 500 );

  // Register own print function :
  QScriptValue printFunction = scriptEngine_.newFunction(myPrintFunction);
  printFunction.setProperty("textedit",scriptEngine_.newQObject(this));
  scriptEngine_.globalObject().setProperty("print", printFunction);

  // Register print to file function :
  QScriptValue printToFileFunc = scriptEngine_.newFunction(printToFileFunction);
  scriptEngine_.globalObject().setProperty("printToFile", printToFileFunc);
  scriptingFunctions_.push_back( "-.printToFile(QString,QString)" );

  // Register help function :
  QScriptValue helpFunc = scriptEngine_.newFunction(helpFunction);
  helpFunc.setProperty("core",scriptEngine_.newQObject(this));
  scriptEngine_.globalObject().setProperty("help", helpFunc);
  scriptingFunctions_.push_back( "-.help(QString)" );

  // Register IdList Type to scripting Engine
  qScriptRegisterSequenceMetaType< IdList >(&scriptEngine_);
  
  // Register Vector of ints Type to scripting Engine
  qScriptRegisterSequenceMetaType< QVector< int > >(&scriptEngine_);
  
  //==========================================================================
  // Register the 3d Vector Type to the core ( is Vec3d )
  //==========================================================================
  qScriptRegisterMetaType(&scriptEngine_,
                          toScriptValueVector,
                          fromScriptValueVector,
                          scriptEngine_.newQObject(&vec3dPrototype_));
                          
  // set a constructor to allow creation via Vector(x,y,z)
  QScriptValue ctorVec3 = scriptEngine_.newFunction(createVector);
  scriptEngine_.globalObject().setProperty("Vector", ctorVec3);

  //==========================================================================
  // Register the 4d Vector Type to the core ( is Vec4d )
  //==========================================================================
  qScriptRegisterMetaType(&scriptEngine_,
                          toScriptValueVector4,
                          fromScriptValueVector4,
                          scriptEngine_.newQObject(&vec4dPrototype_));

  // set a constructor to allow creation via Vector(x,y,z)
  QScriptValue ctorVec4 = scriptEngine_.newFunction(createVector4);
  scriptEngine_.globalObject().setProperty("Vector4", ctorVec4);
                          
  //==========================================================================
  // Register the DataType Class to the core
  //==========================================================================

  // Register DataType in QScriptEngine
  qScriptRegisterMetaType<DataType>(&scriptEngine_,
                          toScriptValueDataType,
                          fromScriptValueDataType,
                          scriptEngine_.newQObject(&DataTypePrototype_));
                          
  // set a constructor to allow creation via DataType(uint)
  QScriptValue dataTypector = scriptEngine_.newFunction(createDataType);
  scriptEngine_.globalObject().setProperty("DataType", dataTypector);     
  
  //==========================================================================
  // Register the Matrix Class to the core
  //==========================================================================

  // Register Matrix Type to scripting Engine ( is ACG::Matrix4x4d )
  qScriptRegisterMetaType(&scriptEngine_,
                          toScriptValueMatrix4x4 ,
                          fromScriptValueMatrix4x4,
                          scriptEngine_.newQObject(&matrix4x4Prototype_));

  // set a constructor to allow creation via Matrix(x,y,z)
  QScriptValue matrix4x4ctor = scriptEngine_.newFunction(createMatrix4x4);
  scriptEngine_.globalObject().setProperty("Matrix4x4", matrix4x4ctor);

  //==========================================================================
  //  Collect Core scripting information
  //==========================================================================

  QScriptValue scriptInstance = scriptEngine_.newQObject(this,
                                                         QScriptEngine::QtOwnership,
                                                         QScriptEngine::ExcludeChildObjects |
                                                         QScriptEngine::ExcludeSuperClassMethods |
                                                         QScriptEngine::ExcludeSuperClassProperties
                                                         );

  scriptEngine_.globalObject().setProperty("core", scriptInstance);

  QScriptValueIterator it(scriptInstance);
  while (it.hasNext()) {
    it.next();

    /// Skip all signals for function calls
    if ( checkSignal( this, it.name().toLatin1() ) )
      continue;

    scriptingFunctions_.push_back( "core." + it.name() );

  }

  loadPlugins();

  if ( OpenFlipper::Options::gui() ) {

    //register keyBinding for all scripting slots
    coreWidget_->slotRegisterSlotKeyBindings();

    //get keyAssignments from config files
    restoreKeyBindings();

    if ( OpenFlipper::Options::currentViewMode( ) != "" )
      coreWidget_->setViewMode( OpenFlipper::Options::currentViewMode() );
    else
      coreWidget_->setViewMode("All");

    // Set the renderer to the one stored in the settings or to default
    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i ) {
      connect( coreWidget_->examiner_widgets_[i], SIGNAL(signalMouseEvent(QMouseEvent*)),
              this                              , SLOT(slotMouseEvent(QMouseEvent*)));
      connect( coreWidget_->examiner_widgets_[i], SIGNAL(signalMouseEventIdentify(QMouseEvent*)),
              this                              , SLOT(slotMouseEventIdentify(QMouseEvent*)));
      connect( coreWidget_->examiner_widgets_[i], SIGNAL(signalMouseEventLight(QMouseEvent*)),
              this                              , SLOT(slotMouseEventLight(QMouseEvent*)));
      connect( coreWidget_->examiner_widgets_[i], SIGNAL(signalWheelEvent(QWheelEvent *, const std::string &)),
              this                              , SLOT(slotWheelEvent(QWheelEvent *, const std::string &)));

      connect( coreWidget_->examiner_widgets_[i], SIGNAL( viewUpdated() ),
               this, SLOT( viewUpdated()) ,Qt::DirectConnection);

      connect( coreWidget_->examiner_widgets_[i], SIGNAL( viewChanged() ),
               coreWidget_->examiner_widgets_[i], SLOT( updateGL() ) ,Qt::DirectConnection);

      // ====================================================
      // Set renderer
      // ====================================================

      QString defaultRendererKey  = "Viewer" + QString::number(i)+"/DefaultRenderer";
      QString defaultRendererName = OpenFlipperSettings().value(defaultRendererKey,"Default Classical Renderer Plugin").toString();

      // Check if the renderer is there
      int defaultRendererId = renderManager().getRendererId(defaultRendererName);

      if ( defaultRendererId == -1 ) {
        emit log(LOGERR,tr("Stored default renderer \"") + defaultRendererName + tr("\" is not available, trying Classical!"));

        // Check if the renderer is there
        defaultRendererId = renderManager().getRendererId("Default Classical Renderer Plugin");

        // Classical available?
        if ( defaultRendererId != -1 ) {
          renderManager().setActive(defaultRendererId,i);
        } else {
          emit log(LOGERR,tr("Default classical renderer is also not available. Trying to use any other renderer i can find!"));

          // debug information for this case, print renderer count and their names
          const unsigned int rendererCount = renderManager().available();
          emit log(LOGERR,tr("Currently ") + QString::number(rendererCount) + tr(" renderers are available:") );
          for (unsigned int i = 0 ; i < rendererCount ; ++i )
            emit log(LOGERR, tr("Renderer ") + QString::number(i) + ": " + renderManager()[i]->name );
        }

      } else {
        renderManager().setActive(defaultRendererId,i);
      }

    }

    // Warn the user in the log and via messagebox, that he is using the build in renderer only
    if ( renderManager().available() == 1 ) {
      emit log(LOGERR,tr("No external plugin renderers available!"));
      emit log(LOGERR,tr("The build in renderer is only a very limited one and is missing many features!"));
      emit log(LOGERR,tr("You should build and use the other renderers!"));

      QMessageBox msgBox;
      msgBox.setText("No external plugin renderers available!");
      msgBox.setInformativeText("The build in renderer is only a very limited one and is missing many features.\nYou should build and use the other free renderers shipped with OpenFlipper.");
      msgBox.setIcon(QMessageBox::Warning);
      msgBox.exec();
    }

  }

  // ===============================================================================================
  // Load Settings from configuration files
  // ===============================================================================================

  QStringList optionFiles = OpenFlipper::Options::optionFiles();
  for ( int i = 0 ; i < (int)optionFiles.size(); ++i) {

    if ( OpenFlipper::Options::gui() && OpenFlipperSettings().value("Core/Gui/splash",true).toBool() ) {
      splash_->showMessage(tr("Loading Configuration File %1/%2").arg(i+1).arg(optionFiles.size()),
                           Qt::AlignBottom | Qt::AlignLeft , Qt::white);
    }

    // Load global ini files. Use only plugin global options from these files as the
    // rest has been loaded at the beginning.
    if ( OpenFlipper::Options::gui() )
      coreWidget_->updateRecent();

    openIniFile( optionFiles[i] ,false,true,false);
  }

  if ( OpenFlipper::Options::gui() && OpenFlipperSettings().value("Core/Gui/splash",true).toBool() )
      splash_->clearMessage();

  // ===============================================================================================
  // Load Settings from configuration files
  // ===============================================================================================

  if ( OpenFlipper::Options::lang().contains("UTF") || OpenFlipper::Options::lang().contains("utf") ) {
    emit log(LOGWARN,tr("UTF8-Locale used!"));
//     emit log(LOGWARN,"Only OFF files are fully supported with UTF8. Others might fail.");
//     emit log(LOGWARN,"You can change your locale by :");
//     emit log(LOGWARN,"export LANG=C");
//     emit log(LOGWARN,"Work is in progress to resolve this issue.");
  }

  if ( OpenFlipper::Options::gui() ) {

    QFile statesFile(OpenFlipper::Options::configDirStr()  + OpenFlipper::Options::dirSeparator() + "WindowStates.dat");

    if (statesFile.exists() ) {
      QSettings windowStates(OpenFlipper::Options::configDirStr()  + OpenFlipper::Options::dirSeparator() + "WindowStates.dat", QSettings::IniFormat);

      //try to restore the windowState
      coreWidget_->restoreState (windowStates.value("Core/Window/State").toByteArray ());
      //try to restore the geometry
      coreWidget_->restoreGeometry (windowStates.value("Core/Window/Geometry").toByteArray ());

      coreWidget_->toolSplitter_->restoreState (windowStates.value("Core/ToolSplitter").toByteArray ());
      coreWidget_->splitter_->restoreState (windowStates.value("Core/LogSplitter").toByteArray ());

      coreWidget_->show();

      applyOptions();

      windowStates.beginGroup ("Core");
      windowStates.beginGroup ("LogSlider");
      coreWidget_->slidingLogger_->restoreState (windowStates);
      windowStates.endGroup ();
      coreWidget_->toolBox_->restoreState (windowStates);
      windowStates.endGroup ();

    } else {

      coreWidget_->show();
      applyOptions();

    }

    if ( OpenFlipperSettings().value("Core/Gui/splash",true).toBool() ) {
        splash_->raise();
        splash_->showMessage(tr("Ready."), Qt::AlignBottom | Qt::AlignLeft , Qt::white);
        QTimer::singleShot(2000, this, SLOT(finishSplash()));
    }

    // start checking for scenegraph changes
    scenegraphCheckTimer_->setInterval (1000 / OpenFlipperSettings().value("Core/Gui/glViewer/maxFrameRate",35).toInt() );
    scenegraphCheckTimer_->start ();
  }

  // System is ready now.
  OpenFlipper::Options::finishedStartup();
  
  QTimer::singleShot(100, this, SLOT(slotExecuteAfterStartup()));
}


//-----------------------------------------------------------------------------

Core::~Core()
{
   for ( uint i = 0 ; i < plugins_.size() ; ++i ){
     BaseInterface* basePlugin = qobject_cast< BaseInterface * >(plugins_[i].plugin);

     // Dont call exit if we cannot get the Plugin
     if ( basePlugin )
       if ( checkSlot( plugins_[i].plugin , "exit()" ) )
          QMetaObject::invokeMethod(plugins_[i].plugin, "exit",  Qt::DirectConnection);
  }

  // Delete the objectRoot if it was constructed
  if ( objectRoot_ != 0 ) {
    objectRoot_->deleteSubtree();
    delete objectRoot_;
  }

  // Clean up loggers
  for ( uint i = 0 ; i < loggers_.size(); ++i )
    delete loggers_[i];

  delete coreWidget_;
}

//-----------------------------------------------------------------------------

void
Core::slotMouseEventIdentify( QMouseEvent* _event )
{
//   // Dont do anything as a context Menu will popup on right button click
//   if ( _event->button() == Qt::RightButton )
//     return;

  // Only catch left-button clicks
  if(_event->button() != Qt::LeftButton) return;

  const QObject* senderPointer = sender();
  unsigned int examinerId = 0;

  if ( senderPointer == 0 ) {
    std::cerr << "Error : slotMouseEventIdentify directly called! This should only be called by an examiner" << std::endl;
  } else {
    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i ) {
      if ( senderPointer == coreWidget_->examiner_widgets_[i] ) {
        examinerId = i;
        if ( OpenFlipper::Options::doSlotDebugging() )
              emit log(LOGINFO,tr("slotMouseEventIdentify from examiner ") + QString::number(i) );
        break;
      }
    }

  }

  PluginFunctions::setActiveExaminer( examinerId );

  // Do picking
  unsigned int   node_idx, target_idx;
  ACG::Vec3d     hit_point;

  if(PluginFunctions::scenegraphPick(ACG::SceneGraph::PICK_ANYTHING, _event->pos(), node_idx, target_idx, &hit_point)) {

    BaseObjectData* object = 0;

    if(PluginFunctions::getPickedObject(node_idx, object)) {
      // Request type information widget
      InformationInterface* infoPlugin = 0;
      infoPlugin = getInfoPlugin(object->dataType());
      if(infoPlugin != 0)
          infoPlugin->slotInformationRequested(_event->pos(), object->dataType());
    }
  }
}

//-----------------------------------------------------------------------------

void
Core::slotMouseEventLight( QMouseEvent* _event )
{
  const QObject* senderPointer = sender();
  unsigned int examinerId = 0;

  if ( senderPointer == 0 ) {
    std::cerr << "Error : slotMouseEventLight directly called! This should only be called by an examiner" << std::endl;
  } else {
    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i ) {
      if ( senderPointer == coreWidget_->examiner_widgets_[i] ) {
        examinerId = i;
        if ( OpenFlipper::Options::doSlotDebugging() )
              emit log(LOGINFO,tr("slotMouseEventLight from examiner ") + QString::number(i) );
        break;
      }
    }

  }

  PluginFunctions::setActiveExaminer( examinerId );

  emit PluginMouseEventLight( _event );


}

//-----------------------------------------------------------------------------


void
Core::slotMouseEvent( QMouseEvent* _event )
{
//   // Dont do anything as a context Menu will popup on right button click
//   if ( _event->button() == Qt::RightButton )
//     return;

  const QObject* senderPointer = sender();
  unsigned int examinerId = 0;

  if ( senderPointer == 0 ) {
    std::cerr << "Error : slotMouseEvent directly called! This should only be called by an examiner" << std::endl;
  } else {
    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i ) {
      if ( senderPointer == coreWidget_->examiner_widgets_[i] ) {
        examinerId = i;
        if ( OpenFlipper::Options::doSlotDebugging() ) {
          QString message = tr("slotMouseEvent from examiner ") + QString::number(i) + " with ";

          if ( _event->type() == QEvent::MouseButtonRelease )
            message += " MouseButtonRelease";
          else if ( _event->type() == QEvent::MouseButtonPress )
            message += " MouseButtonRelease";
          else if ( _event->type() == QEvent::MouseButtonDblClick )
            message += " MouseButtonDblClick";
          else if ( _event->type() == QEvent::MouseMove )
            message += " MouseMove";
          else
            message += tr("unknown event type");

          emit log(LOGINFO,message );
        }

        break;

      }
    }

  }

  PluginFunctions::setActiveExaminer( examinerId );

  emit PluginMouseEvent(_event );
}

//-----------------------------------------------------------------------------

void
Core::slotWheelEvent( QWheelEvent * _event, const std::string & _mode)
{
  const QObject* senderPointer = sender();
  unsigned int examinerId = 0;

  if ( senderPointer == 0 ) {
    std::cerr << "Error : slotWheelEvent directly called! This should only be called by an examiner" << std::endl;
  } else {
    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i ) {
      if ( senderPointer == coreWidget_->examiner_widgets_[i] ) {
        examinerId = i;
        break;
      }
    }

  }

  PluginFunctions::setActiveExaminer( examinerId );

  emit PluginWheelEvent(_event , _mode );
}

//-----------------------------------------------------------------------------

void
Core::slotAddPickMode( const std::string& _mode ) {
  if ( OpenFlipper::Options::gui() )
    coreWidget_->addPickMode(_mode);

}

//-----------------------------------------------------------------------------

void
Core::slotAddHiddenPickMode( const std::string& _mode ) {

  if ( OpenFlipper::Options::gui() )
    coreWidget_->addPickMode(_mode,false,1000,false);

}

//-----------------------------------------------------------------------------

 /** Update the view in the examiner widget
  */
void Core::updateView()
{

  if (OpenFlipper::Options::doSlotDebugging()) {
    if (sender() != 0) {
      if (sender()->metaObject() != 0) {
        emit log(LOGINFO, tr("updateView() called by ") + QString(sender()->metaObject()->className()));
      }
    }
  }

  if (!OpenFlipper::Options::gui())
    return;

  if (OpenFlipperSettings().value("Core/Gui/glViewer/restrictFrameRate", false).toBool()) {

    int elapsed = redrawTime_->elapsed();

    if (elapsed < 1000 / OpenFlipperSettings().value("Core/Gui/glViewer/maxFrameRate", 35).toInt()) {
      // redraw time not reached ... waiting for timer event for next redraw
      if (redrawTimer_->isActive()) {
        if (OpenFlipper::Options::doSlotDebugging())
          emit log(LOGINFO,
              tr("Too early for redraw! Delaying request from ") + QString(sender()->metaObject()->className()));
        return;
      }

      // Start the timer
      redrawTimer_->start((1000 / OpenFlipperSettings().value("Core/Gui/glViewer/maxFrameRate", 35).toInt()) - elapsed);
      return;
    } else if (redrawTimer_->isActive())
      redrawTimer_->stop();

  }

  redrawTime_->restart();

  if (!OpenFlipper::Options::sceneGraphUpdatesBlocked() && !OpenFlipper::Options::redrawDisabled()) {

    for (unsigned int i = 0; i < OpenFlipper::Options::examinerWidgets(); ++i)
      coreWidget_->examiner_widgets_[i]->updateGL();

    // Inform plugins of the scene update
    emit pluginSceneDrawn();
  }


}

//-----------------------------------------------------------------------------

void Core::updateUI() {
  QApplication::processEvents();
}



//-----------------------------------------------------------------------------

 /** Check if scenegraph is dirty and initiate redraw
  */
void Core::checkScenegraphDirty() {
  if ( true )
  {
    // This is a single pass traversal as we only need to check if there is still one node dirty in the graph
    ACG::SceneGraph::CheckDirtyAction action;
    ACG::SceneGraph::traverse( root_node_scenegraph_, action );
    
    // If the scenegraph is dirty, we have to redraw
    if ( action.isDirty () )
      emit updateView ();
  }
}

//-----------------------------------------------------------------------------