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//=============================================================================
//
//                               OpenFlipper
//        Copyright (C) 2008 by Computer Graphics Group, RWTH Aachen
//                           www.openflipper.org
//
//-----------------------------------------------------------------------------
//
//                                License
//
//  OpenFlipper is free software: you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
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//
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//  OpenFlipper is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU Lesser General Public License for more details.
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//
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//  You should have received a copy of the GNU Lesser General Public License
//  along with OpenFlipper.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
//
//   $Revision$
//   $Author$
//   $Date$
//
//=============================================================================





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


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

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

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

#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/BasePlugin/GlobalAccessInterface.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"
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#include "OpenFlipper/BasePlugin/PluginFunctionsCore.hh"
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#include <OpenMesh/Core/System/omstream.hh>

#define WIDGET_HEIGHT 800
#define WIDGET_WIDTH  800

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//== IMPLEMENTATION ==========================================================
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/** \brief Constuctor for the Core Widget ( This is stage 1 , call init for stage 2)
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 *
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 * 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(),
  nextBackupId_(0),
  coreWidget_(0)
{
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  //init logFile
  logStream_ = 0;
  logFile_ = 0;
  OpenFlipper::Options::logFileEnabled(true);

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  //init nodes
  root_node_scenegraph_ = new ACG::SceneGraph::SeparatorNode(0, "SceneGraph Root Node");
  root_node_ = new ACG::SceneGraph::SeparatorNode(root_node_scenegraph_, "Data Root Node");

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   // Add ViewMode All
  ViewMode* vm = new ViewMode();
  vm->name = "All";
  vm->custom = false;
  vm->visibleWidgets = QStringList();
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  viewModes_.push_front(vm);

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

  for (int i=0; i < 4; i++)
    viewerProperties.push_back( new Viewer::ViewerProperties() );

  PluginFunctions::setViewerProperties(viewerProperties);

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  // Get all relevant Paths and Options from option files
  setupOptions();
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  // set discriptions for scriptable slots
  setDescriptions();
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}

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/** \brief Second initialization stage
 *
 * This Stage does the following :\n
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 * - 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
 */
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void
Core::init() {

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  // Make root_node available to the plugins ( defined in PluginFunctions.hh)
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  PluginFunctions::setRootNode( root_node_ );
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  PluginFunctions::setSceneGraphRootNode( root_node_scenegraph_ );
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  // Initialize the first object as the root Object for the object tree
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  objectRoot_ =  dynamic_cast< BaseObject* > ( new GroupObject("ObjectRoot") );
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  PluginFunctions::setDataRoot( objectRoot_ );

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

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    // 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 ();
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    if ( OpenFlipper::Options::splash() ) {
      QPixmap splashPixmap(OpenFlipper::Options::iconDirStr() + OpenFlipper::Options::dirSeparator() + "splash.png");
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      splash_ = new QSplashScreen(splashPixmap);
      splash_->show();
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      splash_->showMessage("Initializing mainwindow" ,
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                          Qt::AlignBottom | Qt::AlignLeft , Qt::white);
      QApplication::processEvents();
    }
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    coreWidget_ = new CoreWidget(viewModes_ , plugins, coreSlots_);
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    connect(coreWidget_, SIGNAL(clearAll())           , this, SLOT(clearAll()));
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    connect(coreWidget_, SIGNAL(loadMenu())           , this, SLOT(loadObject()));
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    connect(coreWidget_, SIGNAL(addEmptyObjectMenu()) , this, SLOT(slotAddEmptyObjectMenu()));
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    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()));
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    connect(coreWidget_, SIGNAL(applyOptions())       , this, SLOT(applyOptions()));
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    connect(coreWidget_, SIGNAL(saveOptions())        , this, SLOT(saveOptions()));
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    connect(coreWidget_, SIGNAL(recentOpen(QAction*)) , this, SLOT(slotRecentOpen(QAction*)));
    connect(coreWidget_, SIGNAL(exit())               , this, SLOT(slotExit()));
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    connect(coreWidget_, SIGNAL(loadPlugin())         , this, SLOT(slotLoadPlugin()));
    connect(coreWidget_, SIGNAL(unloadPlugin())       , this, SLOT(slotUnloadPlugin()));
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    connect(coreWidget_, SIGNAL(call(QString,bool&)), this, SLOT(slotCall(QString,bool&)));

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

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

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

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#ifdef ARCH_DARWIN
    width = rect.width() - 300;
    height = rect.height() - 150;
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//     coreWidget_->setMaximumSize( width, height  );
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#endif

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    coreWidget_->resize(width,height);
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    coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() );

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  }
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  // ======================================================================
  // Create intermediate logger class for Core which will mangle the output
  // ======================================================================
  PluginLogger* newlog = new PluginLogger("Core");
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  loggers_.push_back(newlog);
  connect(this,SIGNAL(log(Logtype, QString )),newlog,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(this,SIGNAL(log(QString )),newlog,SLOT(slotLog(QString )),Qt::DirectConnection);

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  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  // ======================================================================
  // Create a logger class for CoreWidget
  // ======================================================================

  if ( OpenFlipper::Options::gui() ){
    PluginLogger* widgetlog = new PluginLogger("CoreWidget");
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    loggers_.push_back(widgetlog);
    connect(coreWidget_,SIGNAL(log(Logtype, QString )),widgetlog,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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    connect(coreWidget_,SIGNAL(log(QString )),widgetlog,SLOT(slotLog(QString )),Qt::DirectConnection);

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    // 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);
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    // connection to file logger
    connect(widgetlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  }
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  // ======================================================================
  // Catch OpenMesh Error logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGERR);
  omerr().connect(*newlog);
  omerr().disconnect(std::cerr);
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  loggers_.push_back(newlog);
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  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  // ======================================================================
  // Catch OpenMesh omout logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGINFO);
  omout().connect(*newlog);
  omout().disconnect(std::cout);
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  loggers_.push_back(newlog);
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  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  // ======================================================================
  // Catch OpenMesh omlog logs with an own Logger
  // ======================================================================
  newlog = new PluginLogger("Core ( OpenMesh )",LOGOUT);
  omlog().connect(*newlog);
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  loggers_.push_back(newlog);
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  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  // connection to file logger
  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  // ======================================================================
  // Log Scripting stuff through a separate logger
  // ======================================================================
  newlog = new PluginLogger("Scripting",LOGOUT);
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  loggers_.push_back(newlog);
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  // Connect it to the Master logger
  if ( OpenFlipper::Options::gui() )
    connect(newlog,SIGNAL(log(Logtype, QString )),coreWidget_,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLog(Logtype, QString )),Qt::DirectConnection);
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  // connection to file logger
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  connect(newlog,SIGNAL(log(Logtype, QString )),this,SLOT(slotLogToFile(Logtype, QString )),Qt::DirectConnection);
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  // connect signal to logger
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  connect(this,SIGNAL(scriptLog(QString )),newlog,SLOT(slotLog(QString )),Qt::DirectConnection);

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  // ======================================================================
  // This connection will tell the plugins, when their Toolbox is active
  // ======================================================================
  ///@todo reimplement
//   connect(module_list,SIGNAL(currentChanged(int)),this,SLOT(slotToolboxSwitched(int)));
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  // process Events every 500 msecs during script execution
  scriptEngine_.setProcessEventsInterval( 500 );
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  // Register own print function :
  QScriptValue printFunction = scriptEngine_.newFunction(myPrintFunction);
  printFunction.setProperty("textedit",scriptEngine_.newQObject(this));
  scriptEngine_.globalObject().setProperty("print", printFunction);
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  // Register Vector Type to ScriptEngine ( is Vec3d )
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  qScriptRegisterMetaType(&scriptEngine_,
                          toScriptValueVector,
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                          fromScriptValueVector,
                          scriptEngine_.newQObject(&vec3dPrototype_));
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  // set a constructor to allow creation via Vector(x,y,z)
  QScriptValue ctor = scriptEngine_.newFunction(createVector);
  scriptEngine_.globalObject().setProperty("Vector", ctor);
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//    // Register ObjectId Type to ScriptEngine ( is int )
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//   qScriptRegisterMetaType(&scriptEngine_,
//                           toScriptValueObjectId,
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//                           fromScriptValueObjectId);
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//
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//   // set a constructor to allow creation via Vector(x,y,z)
//   ctor = scriptEngine_.newFunction(createObjectId);
//   scriptEngine_.globalObject().setProperty("ObjectId", ctor);
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  // Register idList Type to scripting Engine
  qScriptRegisterSequenceMetaType< idList >(&scriptEngine_);

  qScriptRegisterSequenceMetaType< QVector< int > >(&scriptEngine_);
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  // Register Matrix Type to scripting Engine ( is ACG::Matrix4x4d )
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  qScriptRegisterMetaType(&scriptEngine_,
                          toScriptValueMatrix4x4 ,
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                          fromScriptValueMatrix4x4,
                          scriptEngine_.newQObject(&matrix4x4Prototype_));
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  // set a constructor to allow creation via Matrix(x,y,z)
  QScriptValue matrix4x4ctor = scriptEngine_.newFunction(createMatrix4x4);
  scriptEngine_.globalObject().setProperty("Matrix4x4", matrix4x4ctor);
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  // Collect Core scripting information
  QScriptValue scriptInstance = scriptEngine_.newQObject(this,
                                                         QScriptEngine::QtOwnership,
                                                         QScriptEngine::ExcludeChildObjects |
                                                         QScriptEngine::ExcludeSuperClassMethods |
                                                         QScriptEngine::ExcludeSuperClassProperties
                                                         );
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  scriptEngine_.globalObject().setProperty("core", scriptInstance);
  emit log(LOGOUT,"Core Scripting initialized with Name : core  ");
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  emit log(LOGOUT,"Available scripting functions :");
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  QScriptValueIterator it(scriptInstance);
  while (it.hasNext()) {
    it.next();
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    /// Skip all signals for function calls
    if ( checkSignal( this, it.name().toAscii() ) )
      continue;
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    scriptingFunctions_.push_back( "core." + it.name() );
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    emit log(LOGOUT,"\t" + it.name());
  }
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  emit log(LOGOUT,"=============================================================================================");
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  loadPlugins();
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  if ( OpenFlipper::Options::gui() ) {
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    //register keyBinding for all scripting slots
    coreWidget_->slotRegisterSlotKeyBindings();

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    //get keyAssignments from config files
    restoreKeyBindings();

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    if ( OpenFlipper::Options::defaultToolboxMode( ) != "" )
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      coreWidget_->setViewMode( OpenFlipper::Options::defaultToolboxMode() );
    else
      coreWidget_->setViewMode("All");
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    for ( uint 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(signalWheelEvent(QWheelEvent *, const std::string &)),
              this                              , SLOT(slotWheelEvent(QWheelEvent *, const std::string &)));
    }
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  }
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  // ===============================================================================================
  // Load Settings from configuration files
  // ===============================================================================================

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  QStringList optionFiles = OpenFlipper::Options::optionFiles();
  for ( int i = 0 ; i < (int)optionFiles.size(); ++i) {
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    if ( OpenFlipper::Options::gui() && OpenFlipper::Options::splash() ) {
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      splash_->showMessage("Loading Configuration File " + QString::number(i) + "/"  + QString::number(optionFiles.size()) ,
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                           Qt::AlignBottom | Qt::AlignLeft , Qt::white);
      QApplication::processEvents();
    }
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    // Load global ini files. Use only plugin global options from these files as the
    // rest has been loaded at the beginning.
    openIniFile( optionFiles[i] ,false,true,false);
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  }

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  // ===============================================================================================
  // Load Settings from configuration files
  // ===============================================================================================
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  if ( OpenFlipper::Options::lang().contains("UTF") || OpenFlipper::Options::lang().contains("utf") ) {
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    emit log(LOGWARN,"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.");
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  }
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  if ( OpenFlipper::Options::gui() ) {
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    //try to restore the windowState
    QFile file(QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
                                                  OpenFlipper::Options::dirSeparator() +  "windowState.dat");
    if (file.open(QIODevice::ReadOnly)){
      QByteArray bytes = file.readAll();
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      coreWidget_->restoreState( bytes );
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      file.close();
    }

    //try to restore the geometry
    QFile file2(QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
                                                  OpenFlipper::Options::dirSeparator() +  "geometry.dat");
    if (file2.open(QIODevice::ReadOnly)){
      QByteArray bytes = file2.readAll();
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      coreWidget_->restoreGeometry( bytes );
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      file2.close();
    }

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    coreWidget_->show();
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    applyOptions();

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    if ( OpenFlipper::Options::splash() ) {
      splash_->finish(coreWidget_);
    }
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    // start checking for scenegraph changes
    scenegraphCheckTimer_->setInterval (1000 / OpenFlipper::Options::maxFrameRate());
    scenegraphCheckTimer_->start ();
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  }
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}

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

Core::~Core()
{
   for ( uint i = 0 ; i < plugins.size() ; ++i ){
     BaseInterface* basePlugin = qobject_cast< BaseInterface * >(plugins[i].plugin);
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     // 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);
  }
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  objectRoot_->deleteSubtree();
  delete objectRoot_;
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  // Clean up loggers
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  for ( uint i = 0 ; i < loggers_.size(); ++i )
    delete loggers_[i];

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}

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

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

  }

  PluginFunctions::setActiveExaminer( examinerId );

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  emit PluginMouseEventIdentify( _event );
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}

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


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

  }

  PluginFunctions::setActiveExaminer( examinerId );

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  emit PluginMouseEvent(_event );
}

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

void
Core::slotWheelEvent( QWheelEvent * _event, const std::string & _mode)
{
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  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 );

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  emit PluginWheelEvent(_event , _mode );
}

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

void
Core::slotAddPickMode( const std::string _mode ) {
  if ( OpenFlipper::Options::gui() )
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    for ( uint i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i )
      coreWidget_->examiner_widgets_[i]->addPickMode(_mode);

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}

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

void
Core::slotAddHiddenPickMode( const std::string _mode ) {
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  if ( OpenFlipper::Options::gui() )
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    for ( uint i = 0 ; i < OpenFlipper::Options::examinerWidgets(); ++i )
      coreWidget_->examiner_widgets_[i]->addPickMode(_mode,false,1000,false);

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}

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

 /** Update the view in the examiner widget
  */
void Core::updateView() {
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  if ( OpenFlipper::Options::doSlotDebugging() ) {
    if ( sender() != 0 ) {
      if ( sender()->metaObject() != 0 ) {
        emit log(LOGINFO,"updateView() called by " + QString( sender()->metaObject()->className() ) );
      }
    }
  }

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  if ( OpenFlipper::Options::restrictFrameRate() ) {
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    int elapsed = redrawTime_->elapsed ();
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    if ( elapsed < 1000 / OpenFlipper::Options::maxFrameRate() )
    {
	// redraw time not reached ... waiting for timer event for next redraw
	if ( redrawTimer_->isActive() ) {
	  if ( OpenFlipper::Options::doSlotDebugging() )
	    emit log(LOGINFO,"Too early for redraw! Delaying request from " + QString( sender()->metaObject()->className() ) );
	  return;
	}
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	// Start the timer
	redrawTimer_->start( (1000 / OpenFlipper::Options::maxFrameRate()) - elapsed);
	return;
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    }
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    else if ( redrawTimer_->isActive() )
	redrawTimer_->stop ();
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  }

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  redrawTime_->restart ();
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  if ( OpenFlipper::Options::gui() && !OpenFlipper::Options::loadingSettings() && !OpenFlipper::Options::redrawDisabled() ) {
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    for ( unsigned int i = 0 ; i < OpenFlipper::Options::examinerWidgets() ; ++i )
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      coreWidget_->examiner_widgets_[i]->updateGL();

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  }
}

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

 /** Check if scenegraph is dirty and initiate redraw
  */
void Core::checkScenegraphDirty() {
  if ( true )
  {
    ACG::SceneGraph::CheckDirtyAction action;
    ACG::SceneGraph::traverse( root_node_scenegraph_, action );
    if ( action.isDirty () )
      emit updateView ();
  }
}

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

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void Core::restrictFrameRate( bool _enable ) {
  OpenFlipper::Options::restrictFrameRate( _enable );
}

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

void Core::setMaxFrameRate( int _rate ) {
  OpenFlipper::Options::maxFrameRate( _rate );
  OpenFlipper::Options::restrictFrameRate( true );
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  // update Timer to new framerate
  scenegraphCheckTimer_->setInterval (1000 / OpenFlipper::Options::maxFrameRate());
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}

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

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void
Core::clearAll()
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{
  objectRoot_->deleteSubtree();
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  emit allCleared();
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  emit signalObjectUpdated(-1);
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  slotScriptInfo( "core" , "clearAll()"  );
}

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

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void
Core::exitApplication()
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{
  QTimer* timer = new QTimer();
  connect(timer, SIGNAL(timeout()), this, SLOT(slotExit()));
  timer->start(100);
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  QApplication::quit();
}

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

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void Core::fullscreen( bool _state ) {
  if ( OpenFlipper::Options::gui() )
    coreWidget_->setFullscreen(_state);
}

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

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void Core::showLogger(bool _state) {
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  if ( OpenFlipper::Options::gui() )
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    coreWidget_->showLogger( _state );
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}

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

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void Core::showToolbox( bool _state ) {
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  if ( OpenFlipper::Options::gui() )
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    coreWidget_->showToolbox(_state);
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}
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void Core::multiViewMode( int _mode ) {
  if ( !OpenFlipper::Options::gui() || !OpenFlipper::Options::multiView() )
    return;

  switch (_mode)
  {
    case 0:
      coreWidget_->baseLayout_->setMode (QtMultiViewLayout::SingleView);
      PluginFunctions::setActiveExaminer(0);
      break;
    case 1:
      coreWidget_->baseLayout_->setMode (QtMultiViewLayout::Grid);
      break;
    case 2:
      coreWidget_->baseLayout_->setMode (QtMultiViewLayout::HSplit);
      break;

    default:
      emit log(LOGERR,"Requested illegal multiview mode!");
  }

}



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

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void
Core::slotRecentOpen(QAction* _action)
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{
  QVector< OpenFlipper::Options::RecentFile > recentFiles = OpenFlipper::Options::recentFiles();
  for (int i = 0 ; i < recentFiles.size() ; ++i )
    if ( recentFiles[i].filename == _action->text() ){
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      if (recentFiles[i].type == DATA_NONE)
        loadSettings( recentFiles[i].filename );
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      else{
        OpenFlipper::Options::loadingRecentFile(true);
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        loadObject(recentFiles[i].type, recentFiles[i].filename);
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        OpenFlipper::Options::loadingRecentFile(false);
      }
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      break;
    }
}


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void
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Core::writeOnExit() {
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  QString inifile = QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
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                                                  OpenFlipper::Options::dirSeparator() +  "OpenFlipper.ini";

  INIFile ini;
  if ( ! ini.connect( inifile ,false) ) {
    emit log(LOGERR,"Failed to connect to users ini file");
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    if ( ! ini.connect( inifile,true) ) {
      emit log(LOGERR,"Can not create user ini file");
    } else {
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      writeApplicationOptions(ini);
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      ini.disconnect();
    }
  } else {
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    writeApplicationOptions(ini);
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    ini.disconnect();
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  }

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  //store the windowState
  if ( OpenFlipper::Options::gui() ) {
    QFile file(QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
                                                  OpenFlipper::Options::dirSeparator() +  "windowState.dat");
    if (file.open(QIODevice::WriteOnly))
    {
      file.write( coreWidget_->saveState() );
      file.close();
    }
    QFile file2(QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
                                                  OpenFlipper::Options::dirSeparator() +  "geometry.dat");
    if (file2.open(QIODevice::WriteOnly))
    {
      file2.write( coreWidget_->saveGeometry() );
      file2.close();
    }
  }

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  // Call exit for all plugins
   for (uint i = 0 ; i < plugins.size() ; ++i) {
      BaseInterface* basePlugin = qobject_cast< BaseInterface * >(plugins[i].plugin);
      if ( basePlugin )
          if ( checkSlot( plugins[i].plugin , "exit()" ) )
            QMetaObject::invokeMethod(plugins[i].plugin, "exit",  Qt::DirectConnection);
   }
}

void Core::slotExit() {
  writeOnExit();
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  if (logFile_)
    logFile_->close();

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  qApp->quit();
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}
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/// log to file
void Core::slotLogToFile(Logtype _type, QString _message){

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

  if (logStream_ == 0){
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    //check if a logfile has been specified and if the path is valid

    QFileInfo fi( OpenFlipper::Options::logFile() );

    if (OpenFlipper::Options::logFile() == "" || !fi.dir().exists() )
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        OpenFlipper::Options::logFile(QDir::home().absolutePath() + OpenFlipper::Options::dirSeparator() + ".OpenFlipper" +
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                                                  OpenFlipper::Options::dirSeparator() +  "OpenFlipper.log");

    logFile_ = new QFile( OpenFlipper::Options::logFile() );
    if ( logFile_->open(QFile::WriteOnly) ) {
        logStream_ = new QTextStream (logFile_);
    }else{
      emit log(LOGERR, "Unable to open logfile!");
      return;
    }
  }
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  switch (_type) {
    case LOGINFO:
      (*logStream_) << "INFO:"; break;
    case LOGOUT:
      (*logStream_) << "OUT :"; break;
    case LOGWARN:
      (*logStream_) << "WARN:"; break;
    case LOGERR:
      (*logStream_) << "ERR :"; break;
  }

  (*logStream_) << _message << "\n" << flush;
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}
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/// set descriptions for a scriptable slot
void Core::slotSetSlotDescription(QString      _slotName,   QString _slotDescription,
                              QStringList _parameters, QStringList _descriptions)
{
  //handle core slots
  if (sender() == this){
    SlotInfo info;
    info.slotName = _slotName;
    info.slotDescription = _slotDescription;
    info.parameters = _parameters;
    info.descriptions = _descriptions;

    coreSlots_.push_back( info );
    return;
  }

  //handle plugin slots

  //find plugin
 PluginInfo* pluginInfo = 0;

  for (uint i=0; i < plugins.size(); i++)
    if (plugins[i].plugin == sender())
      pluginInfo = &plugins[i];

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    if (pluginInfo == 0){
      emit log(LOGERR, "Unable to set slot-description. Plugin not found!");
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    return;
  }

  SlotInfo info;
  info.slotName = _slotName;
  info.slotDescription = _slotDescription;
  info.parameters = _parameters;
  info.descriptions = _descriptions;

  pluginInfo->slotInfos.append( info );
}

/// get available Descriptions for a scriptable slot
void Core::slotGetDescription(QString      _function,   QString&     _fnDescription,
                              QStringList& _parameters, QStringList& _descriptions )
{
  QString pluginName = _function.section(".", 0, 0);
  QString slotName   = _function.section(".", 1, 1);

  //handle core slots
  if (pluginName == "core"){

    _fnDescription = "";
    _parameters.clear();
    _descriptions.clear();

    for (int i=0; i < coreSlots_.count(); i++)
      if (coreSlots_[i].slotName == slotName){
      _fnDescription = coreSlots_[i].slotDescription;
      _parameters    = coreSlots_[i].parameters;
      _descriptions  = coreSlots_[i].descriptions;
      return;
      }
    return;
  }

  //handle plugin slots

  //find plugin
  PluginInfo* pluginInfo = 0;

  for (uint i=0; i < plugins.size(); i++)
    if (plugins[i].rpcName == pluginName)
      pluginInfo = &plugins[i];

  if (pluginInfo == 0){
    emit log(LOGERR, "Unable to get slot-description. Plugin not found!");
    return;
  }

  _fnDescription = "";
  _parameters.clear();
  _descriptions.clear();

  //find slot
  for (int i=0; i < pluginInfo->slotInfos.count(); i++)
    if (pluginInfo->slotInfos[i].slotName == slotName){
      _fnDescription = pluginInfo->slotInfos[i].slotDescription;
      _parameters    = pluginInfo->slotInfos[i].parameters;
      _descriptions  = pluginInfo->slotInfos[i].descriptions;
      return;
    }
}

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void Core::snapshotBaseFileName(const QString& _fname, unsigned int _viewerId ){

  if ( OpenFlipper::Options::gui() ) {
    if ( _viewerId >= OpenFlipper::Options::examinerWidgets() ) {
      emit log(LOGERR,"Unable to snapshotBaseFileName for viewer " + QString::number(_viewerId) );
      return;
    }

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    PluginFunctions::viewerProperties(_viewerId).snapshotBaseFileName( _fname );
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  }

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}

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void Core::snapshot( unsigned int _viewerId ){


  if ( OpenFlipper::Options::gui() ) {
    if ( _viewerId >= OpenFlipper::Options::examinerWidgets() ) {
      emit log(LOGERR,"Unable to create snapshot for viewer " + QString::number(_viewerId) );
      return;
    }
    coreWidget_->examiner_widgets_[_viewerId]->snapshot();
  }
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}

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void Core::resizeViewer(int _width, int _height ){
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  if ( OpenFlipper::Options::gui() ){
    //+40 / +20 corresponds to the bottom and right scrollbar
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    coreWidget_->examiner_widgets_[0]->resize(_width+40, _height+20);
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  }
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}

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void Core::writeVersionNumbers(QString _filename){
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INIFile ini;

  if ( ! ini.connect(_filename,true) ) {
    emit log(LOGERR,"Failed to connect to _ini file" + _filename);
      return;
  }

  //add coreVersion
  ini.add_section( "Core" );
  if ( OpenFlipper::Options::isWindows() )
    ini.add_entry( "Core" , "VersionWindows" , OpenFlipper::Options::coreVersion() );
  else
    ini.add_entry( "Core" , "VersionLinux"   , OpenFlipper::Options::coreVersion() );

  //add pluginVersions
  for (uint i=0; i < plugins.size(); i++){
    ini.add_section( plugins[i].name );

    if ( OpenFlipper::Options::isWindows() )
      ini.add_entry( plugins[i].name , "VersionWindows" , plugins[i].version );
    else
      ini.add_entry( plugins[i].name , "VersionLinux"   , plugins[i].version );
  }

  ini.disconnect();
}

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/// set the descriptions for scriptable slots of the core
void Core::setDescriptions(){

  connect(this, SIGNAL(setSlotDescription(QString,QString,QStringList,QStringList)),
          this,   SLOT(slotSetSlotDescription(QString,QString,QStringList,QStringList)) );

  emit setSlotDescription("updateView()", "Redraw the contents of the viewer.", QStringList(), QStringList());
  emit setSlotDescription("clearAll()", "Clear all data objects.", QStringList(), QStringList());
  emit setSlotDescription("exitApplication()", "Quit OpenFlipper", QStringList(), QStringList());
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  emit setSlotDescription("fullscreen(bool)", "Enable or disable fullscreen mode",
                           QStringList("enabled") ,
                           QStringList("Enable or disable fullscreen mode"));
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  emit setSlotDescription("showLogger(bool)", "Show or hide logger window", QStringList("Show or hide logger window"), QStringList());
  emit setSlotDescription("showToolbox(bool)", "Show or hide toolbox", QStringList("Show or hide the toolbox"), QStringList());
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  emit setSlotDescription("multiViewMode(int)", "Switch MultiView Mode",
                          QStringList("Mode"), QStringList("0: One Viewer\n 1: Grid \n 2: Horizontal split"));

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  emit setSlotDescription("restrictFrameRate(bool)", "Restrict FrameRate to MaxFrameRate",
                        QStringList("enabled"), QStringList("restriction switch"));
  emit setSlotDescription("setMaxFrameRate(int)", "set the maximal framerate (automatically enables framerate restriction)",
                        QStringList("frameRate"), QStringList("Maximum frameRate"));
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  emit setSlotDescription("snapshotBaseFileName(QString&)", "Set a filename for storing snapshots."
                          , QStringList(), QStringList());
  emit setSlotDescription("snapshot()", "Make a snapshot of the viewer. If no filename"
                          " was set using snapshotBaseFileName() the snapshot is stored"
                          " in snap.png in the current directory. For every snapshot"
                          " a counter is added to the filename.", QStringList(), QStringList());
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  emit setSlotDescription("resizeViewer(int,int)", "Resize the viewer",
                           QString("width,height").split(","),
                           QString("new width for the viewer,new height for the viewer").split(","));
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  emit setSlotDescription("writeVersionNumbers(QString)", "write the current versions of all plugins to INI file",
                           QStringList("filename"),
                           QStringList("fullpath to a file where the versions should be written to."));
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  //save slots
  emit setSlotDescription("saveObject(int,QString)", "Save object to file. If the file exists it will be overwritten.",
                           QString("object-id,filename").split(","),
                           QString("id of the object, complete path and filename").split(","));
  emit setSlotDescription("saveObjectTo(int,QString)", "Save object to file. The location can be chosen in a dialog. "
                          "(only works if GUI is available)",
                           QString("object-id,filename").split(","),
                           QString("id of the object, initial filename for the dialog").split(","));
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  emit setSlotDescription("saveAllObjects()", "Saves all target objects. "
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                          "If no filename is available a dialog is shown. (only works if GUI is available)",QStringList(), QStringList());
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  emit setSlotDescription("saveAllObjectsTo()", "Saves all target objects. The locations can be chosen in dialogs. "
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                          "(only works if GUI is available)",QStringList(), QStringList());
  emit setSlotDescription("saveSettings()", "Show the dialog to save the current setting. (only works if GUI is available)",QStringList(), QStringList());
  //load slots
  emit setSlotDescription("loadObject()", "Show the dialog to load an object. (only works if GUI is available)",QStringList(), QStringList());
  emit setSlotDescription("loadSettings()", "Show the dialog to load settings. (only works if GUI is available)",QStringList(), QStringList());
  emit setSlotDescription("loadSettings(QString)", "load settings from file.",QStringList(), QStringList());
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  emit setSlotDescription("createWidget(QString,QString);", "Create a widget from an ui file",
                          QString("Object name,ui file").split(","),
                          QString("Name of the new widget in script,ui file to load").split(","));

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}
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// //-----------------------------------------------------------------------------
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//
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// void Core::slotGetPlugin(QString _name, QObject* & _plugin ){
//   for (uint i=0; i < plugins.size(); i++)
//     if (plugins[i].name == _name){
//       _plugin = plugins[i].plugin;
//       return;
//     }
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//
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//   _plugin = 0;
//   return;
// }
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//=============================================================================