diff --git a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.cpp b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.cpp
index d511b02490..e0e66c4750 100644
--- a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.cpp
+++ b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.cpp
@@ -1,387 +1,547 @@
 /*=========================================================================
 
 Program:   Medical Imaging & Interaction Toolkit
 Language:  C++
 Date:      $Date: 2009-05-12 19:14:45 +0200 (Di, 12 Mai 2009) $
 Version:   $Revision: 1.12 $
 
 Copyright (c) German Cancer Research Center, Division of Medical and
 Biological Informatics. All rights reserved.
 See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 
 #include "QmitkIGTPlayerWidget.h"
 
 //mitk headers
 #include "mitkTrackingTypes.h"
 #include <mitkSTLFileReader.h>
 #include <mitkSurface.h>
 #include <mitkNavigationToolReader.h>
 #include <mitkNavigationToolWriter.h>
 #include <mitkNavigationToolStorage.h>
 #include <mitkNavigationToolStorageDeserializer.h>
 #include <mitkNavigationToolStorageSerializer.h>
 
 
 //qt headers
 #include <qfiledialog.h>
 #include <qmessagebox.h>
 #include <qtimer.h>
 
 
 QmitkIGTPlayerWidget::QmitkIGTPlayerWidget(QWidget* parent, Qt::WindowFlags f)
-: QWidget(parent, f), m_Player(NULL), m_StartTime(-1.0)
+: QWidget(parent, f)
+,m_RealTimePlayer(NULL)
+,m_SequentialPlayer(NULL)
+,m_StartTime(-1.0)
+,m_CurrentSequentialPointNumber(0)
 {
   m_Controls = NULL;
   CreateQtPartControl(this);
   CreateConnections();
 
   this->ResetLCDNumbers(); // reset lcd numbers at start
 }
 
 
 QmitkIGTPlayerWidget::~QmitkIGTPlayerWidget()
 { 
   m_PlayingTimer->stop();
-  m_Player = NULL;  
+  m_RealTimePlayer = NULL;  
   m_PlayingTimer = NULL;
 }
 
 void QmitkIGTPlayerWidget::CreateQtPartControl(QWidget *parent)
 {
   if (!m_Controls)
   {
     // create GUI widgets
     m_Controls = new Ui::QmitkIGTPlayerWidgetControls;                         
     m_Controls->setupUi(parent);
 
     m_PlayingTimer = new QTimer(this); // initialize update timer
-
    }
 
 }
 
 void QmitkIGTPlayerWidget::CreateConnections()
 {
   if ( m_Controls )
   {     
     connect( (QObject*)(m_Controls->selectPushButton), SIGNAL(clicked()), this, SLOT(OnSelectPressed()) ); // open file dialog
     connect( (QObject*)(m_Controls->playPushButton), SIGNAL(clicked(bool)), this, SLOT(OnPlayButtonClicked(bool)) ); // play button
     connect( (QObject*)(m_PlayingTimer), SIGNAL(timeout()), this, SLOT(OnPlaying()) ); // update timer
     connect( (QObject*) (m_Controls->beginPushButton), SIGNAL(clicked()), this, SLOT(OnGoToBegin()) ); // reset player and go to begin
     connect( (QObject*) (m_Controls->stopPushButton), SIGNAL(clicked()), this, SLOT(OnGoToEnd()) ); // reset player
     // pass this widgets protected combobox signal to public signal
     connect( (QObject*) (m_Controls->trajectorySelectComboBox), SIGNAL(currentIndexChanged(int)), this, SIGNAL(SignalCurrentTrajectoryChanged(int)) );
     // pass this widgets protected checkbox signal to public signal
     connect( m_Controls->splineModeCheckBox, SIGNAL(toggled(bool)), this, SIGNAL(SignalSplineModeToggled(bool)) );
+    connect( m_Controls->sequencialModeCheckBox, SIGNAL(toggled(bool)), this, SLOT(OnSequencialModeToggled(bool)) );
+
+    connect( m_Controls->samplePositionHorizontalSlider, SIGNAL(sliderPressed()), this, SLOT(OnSliderPressed()) );
+    connect( m_Controls->samplePositionHorizontalSlider, SIGNAL(sliderReleased()), this, SLOT(OnSliderReleased()) );
+    
   }
 }
 
 
 bool QmitkIGTPlayerWidget::IsTrajectoryInSplineMode()
 { 
   return m_Controls->splineModeCheckBox->isChecked();
 }
 
 
 bool QmitkIGTPlayerWidget::CheckInputFileValid()
 {
   QFile file(m_CmpFilename);
 
   // check if file exists
   if(!file.exists()) 
   {
     QMessageBox::warning(NULL, "IGTPlayer: Error", "No valid input file was loaded. Please load input file first!");
     return false;
   }
 
   return true;
 }
 
 
 unsigned int QmitkIGTPlayerWidget::GetNumberOfTools()
 {
   unsigned int result = 0;
   
-  // at the moment this works only if player is initialized
-  if(m_Player.IsNotNull())
-    result = m_Player->GetNumberOfOutputs();
+  if(this->GetCurrentPlaybackMode() == RealTimeMode)
+  { 
+    if(m_RealTimePlayer.IsNotNull())
+      result = m_RealTimePlayer->GetNumberOfOutputs();
+  }
 
+  else if(this->GetCurrentPlaybackMode() == SequentialMode)
+  {
+    if(m_SequentialPlayer.IsNotNull())
+      result = m_SequentialPlayer->GetNumberOfOutputs();
+  }
+
+  // at the moment this works only if player is initialized
   return result;
 }
 
 
 void QmitkIGTPlayerWidget::SetUpdateRate(unsigned int msecs)
 {
   m_PlayingTimer->setInterval((int) msecs); // set update timer update rate
 }
 
 void QmitkIGTPlayerWidget::OnPlayButtonClicked(bool checked)
 {
+
+
   if(CheckInputFileValid())  // no playing possible without valid input file
   {
+    PlaybackMode currentMode = this->GetCurrentPlaybackMode();
+    bool isRealTimeMode = currentMode == RealTimeMode;
+    bool isSequentialMode = currentMode == SequentialMode;
+
     if(checked) // play
     {
-      if(m_Player.IsNull())  // start play
+      if( (isRealTimeMode && m_RealTimePlayer.IsNull()) || (isSequentialMode && m_SequentialPlayer.IsNull()))  // start play
       {
-        m_Player = mitk::NavigationDataPlayer::New();
-        m_Player->SetFileName(m_CmpFilename.toStdString());
+        if(isRealTimeMode)
+        {
+          m_RealTimePlayer = mitk::NavigationDataPlayer::New();
+          m_RealTimePlayer->SetFileName(m_CmpFilename.toStdString());
+          m_RealTimePlayer->StartPlaying();
+        }
+        else if(isSequentialMode)
+        {
+          m_SequentialPlayer = mitk::NavigationDataSequentialPlayer::New();
+          m_SequentialPlayer->SetFileName(m_CmpFilename.toStdString());
+          
+          m_Controls->samplePositionHorizontalSlider->setMinimum(0);
+          m_Controls->samplePositionHorizontalSlider->setMaximum(m_SequentialPlayer->GetNumberOfSnapshots());
+          m_Controls->samplePositionHorizontalSlider->setEnabled(true);
+        }
 
-        m_Player->StartPlaying();
         m_PlayingTimer->start(100);
 
         emit SignalPlayingStarted();
       }
       else // resume play
       {
-        m_Player->Resume();  
+        if(isRealTimeMode)
+          m_RealTimePlayer->Resume();  
+        
         m_PlayingTimer->start(100);
         emit SignalPlayingResumed();
       }
     }
 
     else // pause
     {
-      m_Player->Pause();
+      if(isRealTimeMode)
+        m_RealTimePlayer->Pause();
+      
       m_PlayingTimer->stop();
       emit SignalPlayingPaused();
     }
   }
 
   else
     m_Controls->playPushButton->setChecked(false); // uncheck play button if file unvalid
 }
 
+
+QmitkIGTPlayerWidget::PlaybackMode QmitkIGTPlayerWidget::GetCurrentPlaybackMode()
+{
+  if(m_Controls->sequencialModeCheckBox->isChecked())
+    return SequentialMode;
+  else
+    return RealTimeMode;
+}
+
 QTimer*  QmitkIGTPlayerWidget::GetPlayingTimer()
 {
   return m_PlayingTimer;
 }
 
 void QmitkIGTPlayerWidget::OnStopPlaying()
 {
   this->StopPlaying();
 }
 
 
 void QmitkIGTPlayerWidget::StopPlaying()
 {
   m_PlayingTimer->stop();
   emit SignalPlayingStopped();
-  if(m_Player.IsNotNull())
-    m_Player->StopPlaying();
-  m_Player = NULL;
+  
+  if(m_RealTimePlayer.IsNotNull())
+    m_RealTimePlayer->StopPlaying();
+  
+  m_RealTimePlayer = NULL;
+  m_SequentialPlayer = NULL;
+
   m_StartTime = -1;  // set starttime back
+  m_CurrentSequentialPointNumber = 0;
+  m_Controls->samplePositionHorizontalSlider->setSliderPosition(m_CurrentSequentialPointNumber);
+  m_Controls->sampleLCDNumber->display(static_cast<int>(m_CurrentSequentialPointNumber));
+
   this->ResetLCDNumbers();
   m_Controls->playPushButton->setChecked(false); // set play button unchecked
 
-
 }
 
 void QmitkIGTPlayerWidget::OnPlaying()
 {
-  if(m_Player.IsNull())
+  PlaybackMode currentMode = this->GetCurrentPlaybackMode();
+  bool isRealTimeMode = currentMode == RealTimeMode;
+  bool isSequentialMode = currentMode == SequentialMode;
+
+  if(isRealTimeMode && m_RealTimePlayer.IsNull())
+    return;
+
+  else if(isSequentialMode && m_SequentialPlayer.IsNull())
     return;
 
-  if(m_StartTime < 0)
-    m_StartTime = m_Player->GetOutput()->GetTimeStamp(); // get playback start time
+  if(isRealTimeMode && m_StartTime < 0)
+    m_StartTime = m_RealTimePlayer->GetOutput()->GetTimeStamp(); // get playback start time
+
+
 
-  if(!m_Player->IsAtEnd())
+  if(isRealTimeMode && !m_RealTimePlayer->IsAtEnd())
   {
-    m_Player->Update(); // update player
+    m_RealTimePlayer->Update(); // update player
 
-    int msc = (int) (m_Player->GetOutput()->GetTimeStamp() - m_StartTime);
+    int msc = (int) (m_RealTimePlayer->GetOutput()->GetTimeStamp() - m_StartTime);
 
     // calculation for playing time display
     int ms = msc % 1000;
     msc = (msc - ms) / 1000;
     int s = msc % 60;
     int min = (msc-s) / 60;
 
     // set lcd numbers
     m_Controls->msecLCDNumber->display(ms);
     m_Controls->secLCDNumber->display(s);
     m_Controls->minLCDNumber->display(min);    
 
     emit SignalPlayerUpdated(); // player successfully updated
   }
+  else if(isSequentialMode && (m_CurrentSequentialPointNumber < m_SequentialPlayer->GetNumberOfSnapshots()))
+  {
+    m_SequentialPlayer->Update(); // update sequential player
+    
+    m_Controls->samplePositionHorizontalSlider->setSliderPosition(m_CurrentSequentialPointNumber++); // refresh slider position
+    m_Controls->sampleLCDNumber->display(static_cast<int>(m_CurrentSequentialPointNumber));
+
+    //for debugging purposes
+    //std::cout << "Sample: " << m_CurrentSequentialPointNumber << " X: " << m_SequentialPlayer->GetOutput(0)->GetPosition()[0] << " Y: " << m_SequentialPlayer->GetOutput(0)->GetPosition()[1] << " Y: " << m_SequentialPlayer->GetOutput(0)->GetPosition()[2] << std::endl;
+
+    emit SignalPlayerUpdated(); // player successfully updated
+    
+  }
   else
     this->StopPlaying(); // if player is at EOF
 
 }
 
 const std::vector<mitk::NavigationData::Pointer> QmitkIGTPlayerWidget::GetNavigationDatas()
 {
   std::vector<mitk::NavigationData::Pointer> navDatas;
 
-  if(m_Player.IsNotNull())
+  if(this->GetCurrentPlaybackMode() == RealTimeMode && m_RealTimePlayer.IsNotNull())
   {
-    for(unsigned int i=0; i < m_Player->GetNumberOfOutputs(); ++i)
+    for(unsigned int i=0; i < m_RealTimePlayer->GetNumberOfOutputs(); ++i)
     {
-      navDatas.push_back(m_Player->GetOutput(i)); // push back current navigation data for each tool
+      navDatas.push_back(m_RealTimePlayer->GetOutput(i)); // push back current navigation data for each tool
     }
   } 
+
+  else if(this->GetCurrentPlaybackMode() == SequentialMode && m_SequentialPlayer.IsNotNull())
+  {
+    for(unsigned int i=0; i < m_SequentialPlayer->GetNumberOfOutputs(); ++i)
+    {
+      navDatas.push_back(m_SequentialPlayer->GetOutput(i)); // push back current navigation data for each tool
+    }
+  }
  
   return navDatas;    
 }
 
 const mitk::PointSet::Pointer QmitkIGTPlayerWidget::GetNavigationDatasPointSet()
 {
   mitk::PointSet::Pointer result = mitk::PointSet::New();
   
   mitk::PointSet::PointType pointType;
 
-  if(m_Player.IsNotNull())
+  PlaybackMode currentMode = this->GetCurrentPlaybackMode();
+  bool isRealTimeMode = currentMode == RealTimeMode;
+  bool isSequentialMode = currentMode == SequentialMode;
+  
+
+  if( (isRealTimeMode && m_RealTimePlayer.IsNotNull()) || (isSequentialMode && m_SequentialPlayer.IsNotNull()))
   {
-    for(unsigned int i=0; i < m_Player->GetNumberOfOutputs(); ++i)
+    int numberOfOutputs = 0;
+
+    if(isRealTimeMode)
+      numberOfOutputs = m_RealTimePlayer->GetNumberOfOutputs();
+    else if(isSequentialMode)
+      numberOfOutputs = m_SequentialPlayer->GetNumberOfOutputs();
+    
+    for(unsigned int i=0; i < m_RealTimePlayer->GetNumberOfOutputs(); ++i)
     {
-      mitk::NavigationData::PositionType position = m_Player->GetOutput(i)->GetPosition();
+      mitk::NavigationData::PositionType position;
+      
+      if(isRealTimeMode)
+        position = m_RealTimePlayer->GetOutput(i)->GetPosition();
+      else if(isSequentialMode)
+        position = m_SequentialPlayer->GetOutput(i)->GetPosition();
       
       pointType[0] = position[0];
       pointType[1] = position[1];
       pointType[2] = position[2];
 
       result->InsertPoint(i,pointType);  // insert current ND as Pointtype in PointSet for return
     }
   }
 
   return result;
 }
 
 const mitk::PointSet::PointType QmitkIGTPlayerWidget::GetNavigationDataPoint(unsigned int index)
 {
   if( index > this->GetNumberOfTools() || index < 0 )
     throw std::out_of_range("Tool Index out of range!");
 
+  PlaybackMode currentMode = this->GetCurrentPlaybackMode();
+  bool isRealTimeMode = currentMode == RealTimeMode;
+  bool isSequentialMode = currentMode == SequentialMode;
+ 
+  // create return PointType from current ND for tool index
   mitk::PointSet::PointType result;
 
-  if(m_Player.IsNotNull())
+  if( (isRealTimeMode && m_RealTimePlayer.IsNotNull()) || (isSequentialMode && m_SequentialPlayer.IsNotNull()))
   {
-    // create return PointType from current ND for tool index
-    mitk::NavigationData::PositionType position = m_Player->GetOutput(index)->GetPosition();
+    mitk::NavigationData::PositionType position;
+      
+      if(isRealTimeMode)
+        position = m_RealTimePlayer->GetOutput(index)->GetPosition();
+      else if(isSequentialMode)
+        position = m_SequentialPlayer->GetOutput(index)->GetPosition();
+    
     result[0] = position[0];
     result[1] = position[1];
     result[2] = position[2];
   }
 
   return result;  
 }
 
 
 void QmitkIGTPlayerWidget::SetInputFileName(const QString& inputFileName)
 {
   this->OnGoToEnd(); /// stops playing and resets lcd numbers
 
   QString oldName = m_CmpFilename;
   m_CmpFilename.clear();
 
   m_CmpFilename = inputFileName;
 
   QFile file(m_CmpFilename);
   if(m_CmpFilename.isEmpty() || !file.exists())  
   {    
     QMessageBox::warning(NULL, "Warning", QString("Please enter valid path! Using previous path again."));
     m_CmpFilename=oldName;
     m_Controls->inputFileLineEdit->setText(m_CmpFilename);
   }
 }
 
-void QmitkIGTPlayerWidget::SetPlayer( mitk::NavigationDataPlayer::Pointer player )
+void QmitkIGTPlayerWidget::SetRealTimePlayer( mitk::NavigationDataPlayer::Pointer player )
+{
+  if(player.IsNotNull())
+    m_RealTimePlayer = player;
+}
+
+void QmitkIGTPlayerWidget::SetSequentialPlayer( mitk::NavigationDataSequentialPlayer::Pointer player )
 {
   if(player.IsNotNull())
-    m_Player = player;
+    m_SequentialPlayer = player;
 }
 
+
+
 void QmitkIGTPlayerWidget::OnSelectPressed()
 {
   
   QString oldName = m_CmpFilename;
   m_CmpFilename.clear();
   m_CmpFilename = QFileDialog::getOpenFileName(this, "Load tracking data", QDir::currentPath(),"XML files (*.xml)");
 
   if (m_CmpFilename.isEmpty())//if something went wrong or user pressed cancel in the save dialog
     m_CmpFilename=oldName;
   else
   {
     this->OnGoToEnd(); /// stops playing and resets lcd numbers
     emit SignalInputFileChanged();
   }
 
   m_Controls->inputFileLineEdit->setText(m_CmpFilename);
 }
 
 
 void QmitkIGTPlayerWidget::OnGoToEnd()
 {
   this->StopPlaying(); 
   
   // reset lcd numbers 
   this->ResetLCDNumbers();
 
 
 }
 
 
 void QmitkIGTPlayerWidget::OnGoToBegin()
 {
   // stop player manual so no PlayingStopped()
   m_PlayingTimer->stop();
-  if(m_Player.IsNotNull())
-    m_Player->StopPlaying();
-  m_Player = NULL;  // set player to NULL so it can be initialized again if playback is called afterwards
+
+  if(this->GetCurrentPlaybackMode() == RealTimeMode && m_RealTimePlayer.IsNotNull())
+  {
+    m_RealTimePlayer->StopPlaying();
+    m_RealTimePlayer = NULL;  // set player to NULL so it can be initialized again if playback is called afterwards
+  }
+
   m_StartTime = -1;  // set starttime back
 
   //reset view elements
   m_Controls->playPushButton->setChecked(false);
   this->ResetLCDNumbers();
- 
 }
 
 void QmitkIGTPlayerWidget::ResetLCDNumbers()
 {
     m_Controls->minLCDNumber->display(QString("00"));
     m_Controls->secLCDNumber->display(QString("00"));
     m_Controls->msecLCDNumber->display(QString("000")); 
 }
 
 
 
 void QmitkIGTPlayerWidget::SetTrajectoryNames(const QStringList toolNames)
 { 
   QComboBox* cBox = m_Controls->trajectorySelectComboBox;
  
   if(cBox->count() > 0)
     this->ClearTrajectorySelectCombobox();
     
   // before making changed to QComboBox it is recommended to disconnet it's SIGNALS and SLOTS
   disconnect( (QObject*) (m_Controls->trajectorySelectComboBox), SIGNAL(currentIndexChanged(int)), this, SIGNAL(SignalCurrentTrajectoryChanged(int)) );
 
   if(!toolNames.isEmpty())
     m_Controls->trajectorySelectComboBox->insertItems(0, toolNames); // adding current tool names to combobox
 
   // reconnect after performed changes
   connect( (QObject*) (m_Controls->trajectorySelectComboBox), SIGNAL(currentIndexChanged(int)), this, SIGNAL(SignalCurrentTrajectoryChanged(int)) );
 }
 
 
 int QmitkIGTPlayerWidget::GetResolution()
 {
-   return m_Controls->resolutionSpinBox->value();
+   return m_Controls->resolutionSpinBox->value();  // return currently selected trajectory resolution
 }
 
 void QmitkIGTPlayerWidget::ClearTrajectorySelectCombobox()
 {
   // before making changed to QComboBox it is recommended to disconnet it's SIGNALS and SLOTS
   disconnect( (QObject*) (m_Controls->trajectorySelectComboBox), SIGNAL(currentIndexChanged(int)), this, SIGNAL(SignalCurrentTrajectoryChanged(int)) );
   
   m_Controls->trajectorySelectComboBox->clear();
   
   // reconnect after performed changes
   connect( (QObject*) (m_Controls->trajectorySelectComboBox), SIGNAL(currentIndexChanged(int)), this, SIGNAL(SignalCurrentTrajectoryChanged(int)) );
 }
 
 
+
+void QmitkIGTPlayerWidget::OnSequencialModeToggled(bool toggled)
+{
+    this->StopPlaying(); // stop playing when mode is changed
+  
+    if(toggled)
+    {
+      m_Controls->samplePositionHorizontalSlider->setEnabled(true); // enable slider if sequential mode
+    }
+    else if(!toggled)
+    {
+      m_Controls->samplePositionHorizontalSlider->setSliderPosition(0); // set back and disable slider
+      m_Controls->samplePositionHorizontalSlider->setDisabled(true);
+    }
+
+
+}
+
+void QmitkIGTPlayerWidget::OnSliderReleased()
+{
+  int currentSliderValue = m_Controls->samplePositionHorizontalSlider->value(); // current slider value selected through user movement
+
+  if(currentSliderValue > m_CurrentSequentialPointNumber) // at the moment only forward scrolling is possible
+  {
+    m_SequentialPlayer->GoToSnapshot(currentSliderValue); // move player to selected snapshot
+    m_CurrentSequentialPointNumber = currentSliderValue; 
+    m_Controls->sampleLCDNumber->display(currentSliderValue); // update lcdnumber in widget
+  }
+  else
+    m_Controls->samplePositionHorizontalSlider->setValue(m_CurrentSequentialPointNumber);
+}
+
+void QmitkIGTPlayerWidget::OnSliderPressed()
+{
+  if(m_Controls->playPushButton->isChecked())  // check if widget is playing
+    m_Controls->playPushButton->click(); // perform click to pause the play
+}
\ No newline at end of file
diff --git a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.h b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.h
index 932f125d7a..f8fa8dd4b7 100644
--- a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.h
+++ b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidget.h
@@ -1,235 +1,262 @@
 /*=========================================================================
 
 Program:   Medical Imaging & Interaction Toolkit
 Language:  C++
 Date:      $Date: 2009-05-12 19:14:45 +0200 (Di, 12 Mai 2009) $
 Version:   $Revision: 1.12 $
 
 Copyright (c) German Cancer Research Center, Division of Medical and
 Biological Informatics. All rights reserved.
 See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
 
 =========================================================================*/
 
 #ifndef QmitkIGTPlayerWidget_H
 #define QmitkIGTPlayerWidget_H
 
 //QT headers
 #include <QWidget>
 
 //mitk headers
 #include "MitkIGTUIExports.h"
 #include "mitkNavigationTool.h"
 #include "mitkNavigationDataPlayer.h"
+#include "mitkNavigationDataSequentialPlayer.h"
 #include <mitkTimeStamp.h>
 
 #include <mitkPointSet.h>
 
 
 
 //ui header
 #include "ui_QmitkIGTPlayerWidgetControls.h"
 
 /** Documentation:
 *   \brief GUI to access the IGT Player. 
 *   User must specify the file name where the input xml-file is located. The NavigationDatas from the xml-file can be 
 *   played in normal mode or in PointSet mode. 
 *   
 *   In normal mode the player updates the NavigationDatas every 100ms (can be changed in SetUpdateRate()) and returns
 *   them when GetNavigationDatas() is called.
 *   In PointSet mode the player generates a PointSet with all NavigationDatas from the xml-file. So the playback is
 *   performed on this ND PointSet.
 *
 *   \ingroup IGTUI
 */
 class MitkIGTUI_EXPORT QmitkIGTPlayerWidget : public QWidget
 {
   Q_OBJECT
 
 public:
   static const std::string VIEW_ID;
 
   /*!  
   \brief default constructor  
   */ 
   QmitkIGTPlayerWidget(QWidget* parent = 0, Qt::WindowFlags f = 0);    
 
   /*!  
   \brief default deconstructor  
   */ 
   ~QmitkIGTPlayerWidget();
 
   /*!  
-  \brief Sets the player for this player widget 
+  \brief Sets the real time player for this player widget 
   */ 
-  void SetPlayer(mitk::NavigationDataPlayer::Pointer player);
+  void SetRealTimePlayer(mitk::NavigationDataPlayer::Pointer player);
+
+   /*!  
+  \brief Sets the sequential player for this player widget 
+  */ 
+  void SetSequentialPlayer(mitk::NavigationDataSequentialPlayer::Pointer player);
 
   /*!  
   \brief Returns the playing timer of this widget  
   */ 
   QTimer* GetPlayingTimer();
 
   /*!  
   \brief Returns the current playback NavigationDatas from the xml-file
   */ 
   const std::vector<mitk::NavigationData::Pointer> GetNavigationDatas();
 
   /*!  
   \brief Returns a PointSet of the current NavigationDatas for all recorded tools.
   */
   const mitk::PointSet::Pointer GetNavigationDatasPointSet();
 
   /*!  
   \brief Returns a PointType of the current NavigationData for a specific tool with the given index.
   */
   const mitk::PointSet::PointType GetNavigationDataPoint(unsigned int index);
 
 
   /*!  
   \brief Sets the update rate of this widget's playing timer
   */ 
   void SetUpdateRate(unsigned int msecs);
 
 
   /*!
   \brief Returns the number of different tools from the current playing stream.
   *
   * Retuns 0 if playback file is invalid.
   */
   unsigned int GetNumberOfTools();
 
   /*!  
   \brief Stops the playback
   */ 
   void StopPlaying();
 
   /*!
   \brief Sets the given tool names list to the trajectory select combobox.
   */
   void SetTrajectoryNames(const QStringList toolNames);
 
   /*!
   \brief Returns the current resolution value from the resolution spinbox.
   */
   int GetResolution();
   
   /*!
   \brief Clears all items in the trajectory selection combobox.
   */
   void ClearTrajectorySelectCombobox();
 
   /*!
   \brief Returns whether spline mode checkbox is selected.
   */
   bool IsTrajectoryInSplineMode();
 
+  
+  enum PlaybackMode {       ///< playback mode enum
+      RealTimeMode = 1,
+      SequentialMode = 2
+  };
+
+
+  PlaybackMode GetCurrentPlaybackMode();
+
 
 signals:
   /*!  
   \brief This signal is emitted when the player starts the playback.
   */ 
   void SignalPlayingStarted();
   /*!  
   \brief This signal is emitted when the player resumes after a pause.
   */ 
   void SignalPlayingResumed();
   /*!  
   \brief This signal is emitted when the player stops.
   */ 
   void SignalPlayingStopped();
   /*!  
   \brief This signal is emitted when the player is paused.
   */ 
   void SignalPlayingPaused();
   /*!  
   \brief This signal is emitted when the player reaches the end of the playback.
   */ 
   void SignalPlayingEnded();
 
   /*!  
   \brief This signal is emitted every time the player updated the NavigationDatas.
   */ 
   void SignalPlayerUpdated();
 
   /*!  
   \brief This signal is emitted if the input file for the replay was changed.
   */ 
   void SignalInputFileChanged();
 
   /*!  
   \brief This signal is emitted if the index of the current selected trajectory select combobox item changes.
   */
   void SignalCurrentTrajectoryChanged(int index);
 
   /*!  
   \brief This signal is emitted if the spline mode checkbox is toggled or untoggled.
   */
-  void SignalSplineModeToggled(bool checked);
-
-
+  void SignalSplineModeToggled(bool toggled);
 
 
   protected slots:   
     /*!  
     \brief Starts or pauses the playback
     */ 
     void OnPlayButtonClicked(bool toggled);    
     /*!  
     \brief Updates the playback data
     */ 
     void OnPlaying();   
     /*!  
     \brief Stops the playback
     */  
     void OnStopPlaying();
     /*!  
     \brief Updates the input filename
     */ 
     void SetInputFileName(const QString& inputFileName);
     /*!  
     \brief Opens file open dialog for searching the input file
     */ 
     void OnSelectPressed();
     /*!  
     \brief Stops the playback
     */ 
     void OnGoToEnd();
     /*!  
     \brief Stops the playback and resets the player to the beginning
     */ 
     void OnGoToBegin();
+    /*!  
+    \brief Switches widget between realtime and sequential mode
+    */ 
+    void OnSequencialModeToggled(bool toggled);
+    /*!  
+    \brief Pauses playback when slider is pressed by user
+    */ 
+    void OnSliderPressed();
+    /*!  
+    \brief Moves player position to the position selected with the slider
+    */ 
+    void OnSliderReleased();
+
 
 
 protected:
 
   /// \brief Creation of the connections
   virtual void CreateConnections();
 
-
+  /// \brief Creation of the Qt control
   virtual void CreateQtPartControl(QWidget *parent);
 
   /*!  
   \brief Checks if an imput file with the set filename exists
   */ 
   bool CheckInputFileValid();
 
   /*!  
   \brief Sets all LCD numbers to 0
   */ 
   void ResetLCDNumbers();
 
   Ui::QmitkIGTPlayerWidgetControls* m_Controls;
 
-  mitk::NavigationDataPlayer::Pointer m_Player; ///< plays NDs from a XML file
-
+  mitk::NavigationDataPlayer::Pointer m_RealTimePlayer; ///< plays NDs from a XML file
+  mitk::NavigationDataSequentialPlayer::Pointer m_SequentialPlayer;
+ 
   QString m_CmpFilename; ///< filename of the input file
   QTimer* m_PlayingTimer; ///< update timer
 
   mitk::NavigationData::TimeStampType m_StartTime; ///< start time of playback needed for time display
-
+  unsigned int m_CurrentSequentialPointNumber; ///< current point number
 };
 #endif
\ No newline at end of file
diff --git a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidgetControls.ui b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidgetControls.ui
index 14d04a5314..d5a6a5fa2d 100644
--- a/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidgetControls.ui
+++ b/Modules/IGTUI/Qmitk/QmitkIGTPlayerWidgetControls.ui
@@ -1,405 +1,414 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>QmitkIGTPlayerWidgetControls</class>
  <widget class="QWidget" name="QmitkIGTPlayerWidgetControls">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>398</width>
+    <width>416</width>
     <height>689</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_3">
    <item>
     <widget class="QGroupBox" name="settingsGroupBox">
      <property name="title">
       <string>Settings</string>
      </property>
      <property name="flat">
       <bool>true</bool>
      </property>
      <property name="checkable">
       <bool>false</bool>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout">
       <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_6">
-        <item>
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="0" column="0">
          <widget class="QLabel" name="label_2">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
-            <horstretch>2</horstretch>
+           <sizepolicy hsizetype="Minimum" vsizetype="Preferred">
+            <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="text">
            <string>Input File</string>
           </property>
          </widget>
         </item>
-        <item>
+        <item row="0" column="1" colspan="3">
          <widget class="QLineEdit" name="inputFileLineEdit">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
-            <horstretch>8</horstretch>
+            <horstretch>2</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>150</width>
             <height>0</height>
            </size>
           </property>
           <property name="readOnly">
            <bool>true</bool>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QPushButton" name="selectPushButton">
+        <item row="2" column="0">
+         <widget class="QLabel" name="label">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-            <horstretch>2</horstretch>
+           <sizepolicy hsizetype="Minimum" vsizetype="Preferred">
+            <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
-          <property name="maximumSize">
-           <size>
-            <width>90</width>
-            <height>16777215</height>
-           </size>
-          </property>
-          <property name="font">
-           <font>
-            <weight>50</weight>
-            <bold>false</bold>
-           </font>
-          </property>
           <property name="text">
-           <string>Select</string>
-          </property>
-          <property name="checkable">
-           <bool>false</bool>
+           <string>Trajectory </string>
           </property>
          </widget>
         </item>
-       </layout>
-      </item>
-      <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_5">
-        <item>
-         <widget class="QLabel" name="label">
+        <item row="2" column="1" colspan="2">
+         <widget class="QComboBox" name="trajectorySelectComboBox">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
-            <horstretch>1</horstretch>
+           <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+            <horstretch>4</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
-          <property name="text">
-           <string>Trajectory  </string>
-          </property>
          </widget>
         </item>
-        <item>
-         <widget class="QComboBox" name="trajectorySelectComboBox">
+        <item row="2" column="5">
+         <widget class="QSpinBox" name="resolutionSpinBox">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-            <horstretch>7</horstretch>
+            <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
-         </widget>
-        </item>
-        <item>
-         <spacer name="horizontalSpacer_2">
-          <property name="orientation">
-           <enum>Qt::Horizontal</enum>
+          <property name="minimum">
+           <number>1</number>
           </property>
-          <property name="sizeHint" stdset="0">
-           <size>
-            <width>40</width>
-            <height>20</height>
-           </size>
+          <property name="maximum">
+           <number>25</number>
           </property>
-         </spacer>
+         </widget>
         </item>
-        <item>
+        <item row="2" column="4">
          <widget class="QLabel" name="resolutionLabel">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-            <horstretch>2</horstretch>
+            <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="text">
-           <string>Resolution 1 :</string>
+           <string>Res.: 1:</string>
           </property>
           <property name="alignment">
-           <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+           <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QSpinBox" name="resolutionSpinBox">
+        <item row="2" column="3">
+         <widget class="QCheckBox" name="splineModeCheckBox">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-            <horstretch>1</horstretch>
+            <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
-          <property name="minimum">
-           <number>1</number>
+          <property name="layoutDirection">
+           <enum>Qt::LeftToRight</enum>
           </property>
-          <property name="maximum">
-           <number>25</number>
+          <property name="text">
+           <string>Splines</string>
           </property>
          </widget>
         </item>
-       </layout>
-      </item>
-      <item>
-       <layout class="QHBoxLayout" name="horizontalLayout">
-        <item>
-         <spacer name="horizontalSpacer">
-          <property name="orientation">
-           <enum>Qt::Horizontal</enum>
-          </property>
-          <property name="sizeType">
-           <enum>QSizePolicy::Expanding</enum>
-          </property>
-          <property name="sizeHint" stdset="0">
-           <size>
-            <width>40</width>
-            <height>20</height>
-           </size>
-          </property>
-         </spacer>
-        </item>
-        <item>
-         <widget class="QCheckBox" name="splineModeCheckBox">
+        <item row="0" column="4" colspan="2">
+         <widget class="QPushButton" name="selectPushButton">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
-          <property name="layoutDirection">
-           <enum>Qt::LeftToRight</enum>
+          <property name="maximumSize">
+           <size>
+            <width>90</width>
+            <height>16777215</height>
+           </size>
+          </property>
+          <property name="font">
+           <font>
+            <weight>50</weight>
+            <bold>false</bold>
+           </font>
           </property>
           <property name="text">
-           <string>Spline Trajectory</string>
+           <string>Select</string>
+          </property>
+          <property name="checkable">
+           <bool>false</bool>
           </property>
          </widget>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QGroupBox" name="playerGroupBox">
      <property name="title">
       <string>Player</string>
      </property>
      <property name="flat">
       <bool>true</bool>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_2">
       <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_2">
-        <item>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="1" column="0">
          <widget class="QLCDNumber" name="minLCDNumber">
           <property name="styleSheet">
            <string notr="true">background-color: rgb(60, 60, 60);
 color: rgb(250, 250, 250);</string>
           </property>
+          <property name="frameShadow">
+           <enum>QFrame::Raised</enum>
+          </property>
           <property name="numDigits">
            <number>3</number>
           </property>
           <property name="segmentStyle">
            <enum>QLCDNumber::Flat</enum>
           </property>
           <property name="intValue" stdset="0">
            <number>0</number>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QLabel" name="label_3">
+        <item row="1" column="1">
+         <widget class="QLabel" name="minLabel">
           <property name="text">
            <string>min</string>
           </property>
          </widget>
         </item>
-        <item>
+        <item row="1" column="2">
          <widget class="QLCDNumber" name="secLCDNumber">
           <property name="styleSheet">
            <string notr="true">background-color: rgb(60, 60, 60);
 color: rgb(250, 250, 250);</string>
           </property>
           <property name="numDigits">
            <number>2</number>
           </property>
           <property name="segmentStyle">
            <enum>QLCDNumber::Flat</enum>
           </property>
           <property name="intValue" stdset="0">
            <number>0</number>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QLabel" name="label_4">
+        <item row="1" column="3">
+         <widget class="QLabel" name="secLabel">
           <property name="text">
            <string>sec</string>
           </property>
          </widget>
         </item>
-        <item>
+        <item row="1" column="4">
          <widget class="QLCDNumber" name="msecLCDNumber">
           <property name="styleSheet">
            <string notr="true">background-color: rgb(60, 60, 60);
 color: rgb(250, 250, 250);</string>
           </property>
           <property name="numDigits">
            <number>3</number>
           </property>
           <property name="segmentStyle">
            <enum>QLCDNumber::Flat</enum>
           </property>
           <property name="intValue" stdset="0">
            <number>0</number>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QLabel" name="label_5">
+        <item row="1" column="5">
+         <widget class="QLabel" name="msecLabel">
           <property name="text">
            <string>msec</string>
           </property>
          </widget>
         </item>
-        <item>
+        <item row="1" column="6">
          <spacer name="horizontalSpacer_3">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
            </size>
           </property>
          </spacer>
         </item>
+        <item row="1" column="7">
+         <widget class="QLabel" name="sampleLabel">
+          <property name="text">
+           <string>Sample</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="8">
+         <widget class="QLCDNumber" name="sampleLCDNumber">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="autoFillBackground">
+           <bool>false</bool>
+          </property>
+          <property name="styleSheet">
+           <string notr="true">background-color: rgb(60,60,60)</string>
+          </property>
+          <property name="numDigits">
+           <number>10</number>
+          </property>
+          <property name="segmentStyle">
+           <enum>QLCDNumber::Outline</enum>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <item>
+         <widget class="QSlider" name="samplePositionHorizontalSlider">
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+         </widget>
+        </item>
         <item>
          <widget class="QCheckBox" name="sequencialModeCheckBox">
           <property name="layoutDirection">
            <enum>Qt::LeftToRight</enum>
           </property>
           <property name="text">
            <string>Sequential Mode</string>
           </property>
          </widget>
         </item>
        </layout>
       </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_8">
         <item>
          <widget class="QPushButton" name="beginPushButton">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
             <horstretch>1</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="icon">
            <iconset resource="../resources/IGTUI.qrc">
             <normaloff>:/IGTUI/firstframe.png</normaloff>:/IGTUI/firstframe.png</iconset>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="playPushButton">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
             <horstretch>4</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="toolTip">
            <string>Play at normal speed</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="icon">
            <iconset resource="../resources/IGTUI.qrc">
             <normaloff>:/IGTUI/play.png</normaloff>
             <activeon>:/IGTUI/pause.png</activeon>:/IGTUI/play.png</iconset>
           </property>
           <property name="iconSize">
            <size>
             <width>16</width>
             <height>16</height>
            </size>
           </property>
           <property name="checkable">
            <bool>true</bool>
           </property>
           <property name="checked">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="stopPushButton">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
             <horstretch>1</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="icon">
            <iconset resource="../resources/IGTUI.qrc">
             <normaloff>:/IGTUI/stop.png</normaloff>:/IGTUI/stop.png</iconset>
           </property>
          </widget>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>40</height>
       </size>
      </property>
     </spacer>
    </item>
   </layout>
  </widget>
  <resources>
   <include location="../resources/IGTUI.qrc"/>
  </resources>
  <connections/>
 </ui>