diff --git a/Plugins/org.mitk.gui.qt.measurementtoolbox/src/internal/QmitkMeasurementView.cpp b/Plugins/org.mitk.gui.qt.measurementtoolbox/src/internal/QmitkMeasurementView.cpp
index 83a906a9c9..dbba6d5f53 100644
--- a/Plugins/org.mitk.gui.qt.measurementtoolbox/src/internal/QmitkMeasurementView.cpp
+++ b/Plugins/org.mitk.gui.qt.measurementtoolbox/src/internal/QmitkMeasurementView.cpp
@@ -1,743 +1,750 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #define MEASUREMENT_DEBUG MITK_DEBUG("QmitkMeasurementView") << __LINE__ << ": "
 
 #include "QmitkMeasurementView.h"
 
 #include <QtGui>
 
 #include <mitkVtkLayerController.h>
 #include <mitkWeakPointer.h>
 #include <mitkPlanarCircle.h>
 #include <mitkPlanarPolygon.h>
 #include <mitkPlanarAngle.h>
 #include <mitkPlanarRectangle.h>
 #include <mitkPlanarLine.h>
 #include <mitkPlanarCross.h>
 #include <mitkPlanarFourPointAngle.h>
 #include <mitkPlanarFigureInteractor.h>
 #include <mitkPlaneGeometry.h>
 #include <mitkGlobalInteraction.h>
 #include <mitkILinkedRenderWindowPart.h>
 #include <mitkNodePredicateDataType.h>
 #include <mitkNodePredicateProperty.h>
 #include <mitkNodePredicateAnd.h>
 #include <mitkNodePredicateNot.h>
 #include <QmitkRenderWindow.h>
 
 struct QmitkPlanarFigureData
 {
   QmitkPlanarFigureData()
     : m_Figure(0), m_EndPlacementObserverTag(0), m_SelectObserverTag(0), m_StartInteractionObserverTag(0), m_EndInteractionObserverTag(0)
   {
   }
 
   mitk::PlanarFigure* m_Figure;
   unsigned int m_EndPlacementObserverTag;
   unsigned int m_SelectObserverTag;
   unsigned int m_StartInteractionObserverTag;
   unsigned int m_EndInteractionObserverTag;
 };
 
 struct QmitkMeasurementViewData
 {
   QmitkMeasurementViewData()
     : m_LineCounter(0), m_PathCounter(0), m_AngleCounter(0),
       m_FourPointAngleCounter(0), m_EllipseCounter(0),
       m_RectangleCounter(0), m_PolygonCounter(0), m_UnintializedPlanarFigure(false)
   {
   }
 
   // internal vars
   unsigned int m_LineCounter;
   unsigned int m_PathCounter;
   unsigned int m_AngleCounter;
   unsigned int m_FourPointAngleCounter;
   unsigned int m_EllipseCounter;
   unsigned int m_RectangleCounter;
   unsigned int m_PolygonCounter;
   QList<mitk::DataNode::Pointer> m_CurrentSelection;
   std::map<mitk::DataNode*, QmitkPlanarFigureData> m_DataNodeToPlanarFigureData;
   mitk::WeakPointer<mitk::DataNode> m_SelectedImageNode;
   bool m_UnintializedPlanarFigure;
 
   // WIDGETS
   QWidget* m_Parent;
   QLabel* m_SelectedImageLabel;
   QAction* m_DrawLine;
   QAction* m_DrawPath;
   QAction* m_DrawAngle;
   QAction* m_DrawFourPointAngle;
   QAction* m_DrawEllipse;
   QAction* m_DrawRectangle;
   QAction* m_DrawPolygon;
   QToolBar* m_DrawActionsToolBar;
   QActionGroup* m_DrawActionsGroup;
   QTextBrowser* m_SelectedPlanarFiguresText;
   QPushButton* m_CopyToClipboard;
   QGridLayout* m_Layout;
 };
 
 const std::string QmitkMeasurementView::VIEW_ID = "org.mitk.views.measurement";
 
 QmitkMeasurementView::QmitkMeasurementView()
 : d( new QmitkMeasurementViewData )
 {
 }
 QmitkMeasurementView::~QmitkMeasurementView()
 {
   this->RemoveAllInteractors();
   delete d;
 }
 void QmitkMeasurementView::CreateQtPartControl(QWidget* parent)
 {
   d->m_Parent = parent;
 
   // image label
   QLabel* selectedImageLabel = new QLabel("Reference Image: ");
   d->m_SelectedImageLabel = new QLabel;
   d->m_SelectedImageLabel->setStyleSheet("font-weight: bold;");
 
   d->m_DrawActionsToolBar = new QToolBar;
   d->m_DrawActionsGroup = new QActionGroup(this);
   d->m_DrawActionsGroup->setExclusive(true);
 
   //# add actions
   MEASUREMENT_DEBUG << "Draw Line";
   QAction* currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/line.png"), "Draw Line");
   currentAction->setCheckable(true);
   d->m_DrawLine = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Path";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/path.png"), "Draw Path");
   currentAction->setCheckable(true);
   d->m_DrawPath = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Angle";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/angle.png"), "Draw Angle");
   currentAction->setCheckable(true);
   d->m_DrawAngle = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Four Point Angle";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/four-point-angle.png"), "Draw Four Point Angle");
   currentAction->setCheckable(true);
   d->m_DrawFourPointAngle = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Circle";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/circle.png"), "Draw Circle");
   currentAction->setCheckable(true);
   d->m_DrawEllipse = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Rectangle";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/rectangle.png"), "Draw Rectangle");
   currentAction->setCheckable(true);
   d->m_DrawRectangle = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   MEASUREMENT_DEBUG << "Draw Polygon";
   currentAction = d->m_DrawActionsToolBar->addAction(QIcon(
     ":/measurement/polygon.png"), "Draw Polygon");
   currentAction->setCheckable(true);
   d->m_DrawPolygon = currentAction;
   d->m_DrawActionsToolBar->addAction(currentAction);
   d->m_DrawActionsGroup->addAction(currentAction);
 
   // planar figure details text
   d->m_SelectedPlanarFiguresText = new QTextBrowser;
 
   // copy to clipboard button
   d->m_CopyToClipboard = new QPushButton("Copy to Clipboard");
 
   d->m_Layout = new QGridLayout;
   d->m_Layout->addWidget(selectedImageLabel, 0, 0, 1, 1);
   d->m_Layout->addWidget(d->m_SelectedImageLabel, 0, 1, 1, 1);
   d->m_Layout->addWidget(d->m_DrawActionsToolBar, 1, 0, 1, 2);
   d->m_Layout->addWidget(d->m_SelectedPlanarFiguresText, 2, 0, 1, 2);
   d->m_Layout->addWidget(d->m_CopyToClipboard, 3, 0, 1, 2);
 
   d->m_Parent->setLayout(d->m_Layout);
 
   // create connections
   this->CreateConnections();
 
   // readd interactors and observers
   this->AddAllInteractors();
 }
 void QmitkMeasurementView::CreateConnections()
 {
   QObject::connect( d->m_DrawLine, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawLineTriggered(bool) ) );
   QObject::connect( d->m_DrawPath, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawPathTriggered(bool) ) );
   QObject::connect( d->m_DrawAngle, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawAngleTriggered(bool) ) );
   QObject::connect( d->m_DrawFourPointAngle, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawFourPointAngleTriggered(bool) ) );
   QObject::connect( d->m_DrawEllipse, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawEllipseTriggered(bool) ) );
   QObject::connect( d->m_DrawRectangle, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawRectangleTriggered(bool) ) );
   QObject::connect( d->m_DrawPolygon, SIGNAL( triggered(bool) )
     , this, SLOT( ActionDrawPolygonTriggered(bool) ) );
   QObject::connect( d->m_CopyToClipboard, SIGNAL( clicked(bool) )
     , this, SLOT( CopyToClipboard(bool) ) );
 }
 
 void QmitkMeasurementView::NodeAdded( const mitk::DataNode* node )
 {
   // add observer for selection in renderwindow
   mitk::PlanarFigure* figure = dynamic_cast<mitk::PlanarFigure*>(node->GetData());
   bool isPositionMarker (false);
   node->GetBoolProperty("isContourMarker", isPositionMarker);
   if( figure && !isPositionMarker )
   {
     MEASUREMENT_DEBUG << "figure added. will add interactor if needed.";
     mitk::PlanarFigureInteractor::Pointer figureInteractor
         = dynamic_cast<mitk::PlanarFigureInteractor*>(node->GetInteractor());
 
     mitk::DataNode* nonConstNode = const_cast<mitk::DataNode*>( node );
     if(figureInteractor.IsNull())
     {
       figureInteractor = mitk::PlanarFigureInteractor::New("PlanarFigureInteractor", nonConstNode);
     }
     else
     {
       // just to be sure that the interactor is not added twice
       mitk::GlobalInteraction::GetInstance()->RemoveInteractor(figureInteractor);
     }
 
     MEASUREMENT_DEBUG << "adding interactor to globalinteraction";
     mitk::GlobalInteraction::GetInstance()->AddInteractor(figureInteractor);
 
     MEASUREMENT_DEBUG << "will now add observers for planarfigure";
     QmitkPlanarFigureData data;
     data.m_Figure = figure;
 
     // add observer for event when figure has been placed
     typedef itk::SimpleMemberCommand< QmitkMeasurementView > SimpleCommandType;
     SimpleCommandType::Pointer initializationCommand = SimpleCommandType::New();
     initializationCommand->SetCallbackFunction( this, &QmitkMeasurementView::PlanarFigureInitialized );
     data.m_EndPlacementObserverTag = figure->AddObserver( mitk::EndPlacementPlanarFigureEvent(), initializationCommand );
 
     // add observer for event when figure is picked (selected)
     typedef itk::MemberCommand< QmitkMeasurementView > MemberCommandType;
     MemberCommandType::Pointer selectCommand = MemberCommandType::New();
     selectCommand->SetCallbackFunction( this, &QmitkMeasurementView::PlanarFigureSelected );
     data.m_SelectObserverTag = figure->AddObserver( mitk::SelectPlanarFigureEvent(), selectCommand );
 
     // add observer for event when interaction with figure starts
     SimpleCommandType::Pointer startInteractionCommand = SimpleCommandType::New();
     startInteractionCommand->SetCallbackFunction( this, &QmitkMeasurementView::DisableCrosshairNavigation);
     data.m_StartInteractionObserverTag = figure->AddObserver( mitk::StartInteractionPlanarFigureEvent(), startInteractionCommand );
 
     // add observer for event when interaction with figure starts
     SimpleCommandType::Pointer endInteractionCommand = SimpleCommandType::New();
     endInteractionCommand->SetCallbackFunction( this, &QmitkMeasurementView::EnableCrosshairNavigation);
     data.m_EndInteractionObserverTag = figure->AddObserver( mitk::EndInteractionPlanarFigureEvent(), endInteractionCommand );
 
     // adding to the map of tracked planarfigures
     d->m_DataNodeToPlanarFigureData[nonConstNode] = data;
   }
   this->CheckForTopMostVisibleImage();
 }
 
 void QmitkMeasurementView::NodeChanged(const mitk::DataNode* node)
 {
   // DETERMINE IF WE HAVE TO RENEW OUR DETAILS TEXT (ANY NODE CHANGED IN OUR SELECTION?)
   bool renewText = false;
   for( int i=0; i < d->m_CurrentSelection.size(); ++i )
   {
     if( node == d->m_CurrentSelection.at(i) )
     {
       renewText = true;
       break;
     }
   }
 
   if(renewText)
   {
     MEASUREMENT_DEBUG << "Selected nodes changed. Refreshing text.";
     this->UpdateMeasurementText();
   }
 
   this->CheckForTopMostVisibleImage();
 }
 
 void QmitkMeasurementView::CheckForTopMostVisibleImage(mitk::DataNode* _NodeToNeglect)
 {
   d->m_SelectedImageNode = this->DetectTopMostVisibleImage().GetPointer();
   if( d->m_SelectedImageNode.GetPointer() == _NodeToNeglect )
     d->m_SelectedImageNode = 0;
 
   if( d->m_SelectedImageNode.IsNotNull() && d->m_UnintializedPlanarFigure == false )
   {
     MEASUREMENT_DEBUG << "Reference image found";
     d->m_SelectedImageLabel->setText( QString::fromStdString( d->m_SelectedImageNode->GetName() ) );
     d->m_DrawActionsToolBar->setEnabled(true);
     MEASUREMENT_DEBUG << "Updating Measurement text";
   }
   else
   {
     MEASUREMENT_DEBUG << "No reference image available. Will disable actions for creating new planarfigures";
     if( d->m_UnintializedPlanarFigure == false )
       d->m_SelectedImageLabel->setText( "No visible image available." );
 
     d->m_DrawActionsToolBar->setEnabled(false);
   }
 }
 
 void QmitkMeasurementView::NodeRemoved(const mitk::DataNode* node)
 {
   MEASUREMENT_DEBUG << "node removed from data storage";
 
   mitk::DataNode* nonConstNode = const_cast<mitk::DataNode*>(node);
   std::map<mitk::DataNode*, QmitkPlanarFigureData>::iterator it =
       d->m_DataNodeToPlanarFigureData.find(nonConstNode);
 
   bool isFigureFinished = false;
   bool isPlaced = false;
 
   if( it != d->m_DataNodeToPlanarFigureData.end() )
   {
     QmitkPlanarFigureData& data = it->second;
     // remove observers
     data.m_Figure->RemoveObserver( data.m_EndPlacementObserverTag );
     data.m_Figure->RemoveObserver( data.m_SelectObserverTag );
     data.m_Figure->RemoveObserver( data.m_StartInteractionObserverTag );
     data.m_Figure->RemoveObserver( data.m_EndInteractionObserverTag );
 
     MEASUREMENT_DEBUG << "removing from the list of tracked planar figures";
     d->m_DataNodeToPlanarFigureData.erase( it );
 
     isFigureFinished = data.m_Figure->GetPropertyList()->GetBoolProperty("initiallyplaced",isPlaced);
     if (!isFigureFinished) { // if the property does not yet exist or is false, drop the datanode
       PlanarFigureInitialized(); // normally called when a figure is finished, to reset all buttons
     }
   }
 
   mitk::TNodePredicateDataType<mitk::PlanarFigure>::Pointer isPlanarFigure = mitk::TNodePredicateDataType<mitk::PlanarFigure>::New();
 
   mitk::DataStorage::SetOfObjects::ConstPointer nodes =
    GetDataStorage()->GetDerivations(node,isPlanarFigure);
 
   for (unsigned int x = 0; x < nodes->size(); x++)
   {
     mitk::PlanarFigure* planarFigure  = dynamic_cast<mitk::PlanarFigure*>  (nodes->at(x)->GetData());
     if (planarFigure != NULL) {
 
       isFigureFinished = planarFigure->GetPropertyList()->GetBoolProperty("initiallyplaced",isPlaced);
       if (!isFigureFinished) { // if the property does not yet exist or is false, drop the datanode
         GetDataStorage()->Remove(nodes->at(x));
-        std::map<mitk::DataNode*, QmitkPlanarFigureData>::iterator it2 =
+        if( !d->m_DataNodeToPlanarFigureData.empty() )
+        {
+          std::map<mitk::DataNode*, QmitkPlanarFigureData>::iterator it2 =
             d->m_DataNodeToPlanarFigureData.find(nodes->at(x));
-        d->m_DataNodeToPlanarFigureData.erase( it2 );// removing planar figure from tracked figure list
-        PlanarFigureInitialized(); // normally called when a figure is finished, to reset all buttons
+          //check if returned it2 valid
+          if( it2 != d->m_DataNodeToPlanarFigureData.end() )
+          {
+            d->m_DataNodeToPlanarFigureData.erase( it2 );// removing planar figure from tracked figure list
+            PlanarFigureInitialized(); // normally called when a figure is finished, to reset all buttons
+          }
+        }
       }
     }
   }
   this->CheckForTopMostVisibleImage(nonConstNode);
 }
 
 
 void QmitkMeasurementView::PlanarFigureSelected( itk::Object* object, const itk::EventObject& )
 {
   MEASUREMENT_DEBUG << "planar figure " << object << " selected";
   std::map<mitk::DataNode*, QmitkPlanarFigureData>::iterator it =
       d->m_DataNodeToPlanarFigureData.begin();
 
   d->m_CurrentSelection.clear();
   while( it != d->m_DataNodeToPlanarFigureData.end())
   {
     mitk::DataNode* node = it->first;
     QmitkPlanarFigureData& data = it->second;
 
     if( data.m_Figure == object )
     {
       MITK_DEBUG << "selected node found. enabling selection";
       node->SetSelected(true);
       d->m_CurrentSelection.push_back( node );
     }
     else
     {
       node->SetSelected(false);
     }
 
     ++it;
   }
   this->UpdateMeasurementText();
   this->RequestRenderWindowUpdate();
 }
 
 void QmitkMeasurementView::PlanarFigureInitialized()
 {
   MEASUREMENT_DEBUG << "planar figure initialized";
   d->m_UnintializedPlanarFigure = false;
   d->m_DrawActionsToolBar->setEnabled(true);
 
   d->m_DrawLine->setChecked(false);
   d->m_DrawPath->setChecked(false);
   d->m_DrawAngle->setChecked(false);
   d->m_DrawFourPointAngle->setChecked(false);
   d->m_DrawEllipse->setChecked(false);
   d->m_DrawRectangle->setChecked(false);
   d->m_DrawPolygon->setChecked(false);
 }
 
 void QmitkMeasurementView::SetFocus()
 {
   d->m_SelectedImageLabel->setFocus();
 }
 
 void QmitkMeasurementView::OnSelectionChanged(berry::IWorkbenchPart::Pointer /*part*/,
                                               const QList<mitk::DataNode::Pointer> &nodes)
 {
   MEASUREMENT_DEBUG << "Determine the top most visible image";
   MEASUREMENT_DEBUG << "The PlanarFigure interactor will take the currently visible PlaneGeometry from the slice navigation controller";
 
   this->CheckForTopMostVisibleImage();
 
   MEASUREMENT_DEBUG << "refreshing selection and detailed text";
   d->m_CurrentSelection = nodes;
   this->UpdateMeasurementText();
 
   for( int i=d->m_CurrentSelection.size()-1; i>= 0; --i)
   {
     mitk::DataNode* node = d->m_CurrentSelection.at(i);
 
     mitk::PlanarFigure* _PlanarFigure = dynamic_cast<mitk::PlanarFigure*> (node->GetData());
 
     // the last selected planar figure
     if( _PlanarFigure )
     {
       mitk::ILinkedRenderWindowPart* linkedRenderWindow =
           dynamic_cast<mitk::ILinkedRenderWindowPart*>(this->GetRenderWindowPart());
       if( linkedRenderWindow )
       {
         mitk::Point3D centerP = _PlanarFigure->GetGeometry()->GetOrigin();
         linkedRenderWindow->GetQmitkRenderWindow("axial")->GetSliceNavigationController()->SelectSliceByPoint(centerP);
       }
       break;
     }
   }
 
   this->RequestRenderWindowUpdate();
 }
 
 void QmitkMeasurementView::ActionDrawLineTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarLine::Pointer figure = mitk::PlanarLine::New();
   QString qString = QString("Line%1").arg(++d->m_LineCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarLine initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawPathTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarPolygon::Pointer figure = mitk::PlanarPolygon::New();
   figure->ClosedOff();
   QString qString = QString("Path%1").arg(++d->m_PathCounter);
   mitk::DataNode::Pointer node = this->AddFigureToDataStorage(figure, qString);
   mitk::BoolProperty::Pointer closedProperty = mitk::BoolProperty::New( false );
   node->SetProperty("ClosedPlanarPolygon", closedProperty);
 
   MEASUREMENT_DEBUG << "PlanarPath initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawAngleTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarAngle::Pointer figure = mitk::PlanarAngle::New();
   QString qString = QString("Angle%1").arg(++d->m_AngleCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarAngle initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawFourPointAngleTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarFourPointAngle::Pointer figure =
     mitk::PlanarFourPointAngle::New();
   QString qString = QString("Four Point Angle%1").arg(++d->m_FourPointAngleCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarFourPointAngle initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawEllipseTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarCircle::Pointer figure = mitk::PlanarCircle::New();
   QString qString = QString("Circle%1").arg(++d->m_EllipseCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarCircle initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawRectangleTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarRectangle::Pointer figure = mitk::PlanarRectangle::New();
   QString qString = QString("Rectangle%1").arg(++d->m_RectangleCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarRectangle initialized...";
 }
 
 void QmitkMeasurementView::ActionDrawPolygonTriggered(bool checked)
 {
   Q_UNUSED(checked)
 
   mitk::PlanarPolygon::Pointer figure = mitk::PlanarPolygon::New();
   figure->ClosedOn();
   QString qString = QString("Polygon%1").arg(++d->m_PolygonCounter);
   this->AddFigureToDataStorage(figure, qString);
 
   MEASUREMENT_DEBUG << "PlanarPolygon initialized...";
 }
 
 void QmitkMeasurementView::CopyToClipboard( bool checked )
 {
   Q_UNUSED(checked)
 
   MEASUREMENT_DEBUG << "Copying current Text to clipboard...";
   QString clipboardText = d->m_SelectedPlanarFiguresText->toPlainText();
   QApplication::clipboard()->setText(clipboardText, QClipboard::Clipboard);
 }
 
 mitk::DataNode::Pointer QmitkMeasurementView::AddFigureToDataStorage(
   mitk::PlanarFigure* figure, const QString& name)
 {
   // add as
   MEASUREMENT_DEBUG << "Adding new figure to datastorage...";
   if( d->m_SelectedImageNode.IsNull() )
   {
     MITK_ERROR << "No reference image available";
     return 0;
   }
 
   mitk::DataNode::Pointer newNode = mitk::DataNode::New();
   newNode->SetName(name.toStdString());
   newNode->SetData(figure);
   // set as selected
   newNode->SetSelected( true );
   this->GetDataStorage()->Add(newNode, d->m_SelectedImageNode);
 
   // set all others in selection as deselected
   for( int i=0; i<d->m_CurrentSelection.size(); ++i)
     d->m_CurrentSelection.at(i)->SetSelected(false);
   d->m_CurrentSelection.clear();
   d->m_CurrentSelection.push_back( newNode );
   this->UpdateMeasurementText();
   this->DisableCrosshairNavigation();
   d->m_DrawActionsToolBar->setEnabled(false);
   d->m_UnintializedPlanarFigure = true;
   return newNode;
 }
 
 void QmitkMeasurementView::UpdateMeasurementText()
 {
   d->m_SelectedPlanarFiguresText->clear();
 
   QString infoText;
   QString plainInfoText;
   int j = 1;
   mitk::PlanarFigure* _PlanarFigure = 0;
   mitk::PlanarAngle* planarAngle = 0;
   mitk::PlanarFourPointAngle* planarFourPointAngle = 0;
   mitk::DataNode::Pointer node = 0;
 
   for (int i=0; i<d->m_CurrentSelection.size(); ++i, ++j)
   {
     plainInfoText.clear();
     node = d->m_CurrentSelection.at(i);
     _PlanarFigure = dynamic_cast<mitk::PlanarFigure*> (node->GetData());
 
     if( !_PlanarFigure )
       continue;
 
     if(j>1)
       infoText.append("<br />");
 
     infoText.append(QString("<b>%1</b><hr />").arg(QString::fromStdString(
       node->GetName())));
     plainInfoText.append(QString("%1").arg(QString::fromStdString(
       node->GetName())));
 
     planarAngle = dynamic_cast<mitk::PlanarAngle*> (_PlanarFigure);
     if(!planarAngle)
     {
       planarFourPointAngle = dynamic_cast<mitk::PlanarFourPointAngle*> (_PlanarFigure);
     }
 
     double featureQuantity = 0.0;
     for (unsigned int k = 0; k < _PlanarFigure->GetNumberOfFeatures(); ++k)
     {
       if ( !_PlanarFigure->IsFeatureActive( k ) ) continue;
 
       featureQuantity = _PlanarFigure->GetQuantity(k);
       if ((planarAngle && k == planarAngle->FEATURE_ID_ANGLE)
         || (planarFourPointAngle && k == planarFourPointAngle->FEATURE_ID_ANGLE))
         featureQuantity = featureQuantity * 180 / vnl_math::pi;
 
       infoText.append(
         QString("<i>%1</i>: %2 %3") .arg(QString(
         _PlanarFigure->GetFeatureName(k))) .arg(featureQuantity, 0, 'f',
         2) .arg(QString(_PlanarFigure->GetFeatureUnit(k))));
 
       plainInfoText.append(
         QString("\n%1: %2 %3") .arg(QString(_PlanarFigure->GetFeatureName(k))) .arg(
         featureQuantity, 0, 'f', 2) .arg(QString(
         _PlanarFigure->GetFeatureUnit(k))));
 
       if(k+1 != _PlanarFigure->GetNumberOfFeatures())
         infoText.append("<br />");
     }
 
     if (j != d->m_CurrentSelection.size())
       infoText.append("<br />");
   }
 
   d->m_SelectedPlanarFiguresText->setHtml(infoText);
 }
 
 void QmitkMeasurementView::AddAllInteractors()
 {
   MEASUREMENT_DEBUG << "Adding interactors to all planar figures";
 
   mitk::DataStorage::SetOfObjects::ConstPointer _NodeSet = this->GetDataStorage()->GetAll();
   const mitk::DataNode* node = 0;
 
   for(mitk::DataStorage::SetOfObjects::ConstIterator it=_NodeSet->Begin(); it!=_NodeSet->End()
     ; it++)
   {
     node = const_cast<mitk::DataNode*>(it->Value().GetPointer());
     this->NodeAdded( node );
   }
 }
 
 void QmitkMeasurementView::RemoveAllInteractors()
 {
   MEASUREMENT_DEBUG << "Removing interactors and observers from all planar figures";
 
   mitk::DataStorage::SetOfObjects::ConstPointer _NodeSet = this->GetDataStorage()->GetAll();
   const mitk::DataNode* node = 0;
 
   for(mitk::DataStorage::SetOfObjects::ConstIterator it=_NodeSet->Begin(); it!=_NodeSet->End()
     ; it++)
   {
     node = const_cast<mitk::DataNode*>(it->Value().GetPointer());
     this->NodeRemoved( node );
   }
 }
 
 mitk::DataNode::Pointer QmitkMeasurementView::DetectTopMostVisibleImage()
 {
   // get all images from the data storage which are not a segmentation
   mitk::TNodePredicateDataType<mitk::Image>::Pointer isImage = mitk::TNodePredicateDataType<mitk::Image>::New();
   mitk::NodePredicateProperty::Pointer isBinary = mitk::NodePredicateProperty::New("binary", mitk::BoolProperty::New(true));
   mitk::NodePredicateNot::Pointer isNotBinary = mitk::NodePredicateNot::New( isBinary );
   mitk::NodePredicateAnd::Pointer isNormalImage = mitk::NodePredicateAnd::New( isImage, isNotBinary );
 
   mitk::DataStorage::SetOfObjects::ConstPointer Images
       = this->GetDataStorage()->GetSubset( isNormalImage );
 
 
   mitk::DataNode::Pointer currentNode;
   int maxLayer = itk::NumericTraits<int>::min();
 
   // iterate over selection
   for (mitk::DataStorage::SetOfObjects::ConstIterator sofIt = Images->Begin(); sofIt != Images->End(); ++sofIt)
   {
     mitk::DataNode::Pointer node = sofIt->Value();
     if ( node.IsNull() )
       continue;
     if (node->IsVisible(NULL) == false)
       continue;
     // we also do not want to assign planar figures to helper objects ( even if they are of type image )
     if (node->GetProperty("helper object"))
       continue;
 
     int layer = 0;
     node->GetIntProperty("layer", layer);
     if ( layer < maxLayer )
     {
       continue;
     }
     else
     {
       maxLayer = layer;
       currentNode = node;
     }
   }
 
   return currentNode;
 }
 
 void QmitkMeasurementView::EnableCrosshairNavigation()
 {
   MEASUREMENT_DEBUG << "EnableCrosshairNavigation";
 
   // enable the crosshair navigation
   if (mitk::ILinkedRenderWindowPart* linkedRenderWindow =
       dynamic_cast<mitk::ILinkedRenderWindowPart*>(this->GetRenderWindowPart()))
   {
     MEASUREMENT_DEBUG << "enabling linked navigation";
     linkedRenderWindow->EnableLinkedNavigation(true);
     linkedRenderWindow->EnableSlicingPlanes(true);
   }
 }
 
 void QmitkMeasurementView::DisableCrosshairNavigation()
 {
   MEASUREMENT_DEBUG << "DisableCrosshairNavigation";
 
   // disable the crosshair navigation during the drawing
   if (mitk::ILinkedRenderWindowPart* linkedRenderWindow =
       dynamic_cast<mitk::ILinkedRenderWindowPart*>(this->GetRenderWindowPart()))
   {
     MEASUREMENT_DEBUG << "disabling linked navigation";
     linkedRenderWindow->EnableLinkedNavigation(false);
     linkedRenderWindow->EnableSlicingPlanes(false);
   }
 }