diff --git a/Modules/Chart/resource/Chart.js b/Modules/Chart/resource/Chart.js
index b51c6e4270..65552eca2e 100644
--- a/Modules/Chart/resource/Chart.js
+++ b/Modules/Chart/resource/Chart.js
@@ -1,348 +1,372 @@
 document.body.style.backgroundColor = 'rgb(240, 240, 240)';
 
 const minHeight = 255;
 var chart;
 
 var chartData;
 var xErrorValuesPlus=[];
 var xErrorValuesMinus=[];
 var yErrorValuesPlus=[];
 var yErrorValuesMinus=[];
 var xValues=[];
 var yValues=[];
 var dataLabels=[];
 var xs = {};
 
 var dataColors = {};
 var chartTypes = {};
 var lineStyle = {};
 var backgroundColor = '#f0f0f0';
 var foregroundColor = 'black';
 
 var dataProperties = {};
 
 // Important loading function. This will be executed at first in this whole script.
 // Fetching data from QWebChannel and storing them for display purposes.
 window.onload = function()
 {
   initHeight();
 
   new QWebChannel(qt.webChannelTransport, function(channel) {
     chartData = channel.objects.chartData;
 
     let count = 0;
     for(let propertyName in channel.objects) {
-    if (propertyName != 'chartData')
-    {
+      if (propertyName != 'chartData')
+      {
         let xDataTemp = channel.objects[propertyName].m_XData;
         let yDataTemp = channel.objects[propertyName].m_YData;
-	    let xErrorsTempPlus = channel.objects[propertyName].m_XErrorDataPlus;
-		let xErrorsTempMinus = channel.objects[propertyName].m_XErrorDataMinus;
-		let yErrorsTempPlus = channel.objects[propertyName].m_YErrorDataPlus;
-		let yErrorsTempMinus = channel.objects[propertyName].m_YErrorDataMinus;  
+        let xErrorsTempPlus = channel.objects[propertyName].m_XErrorDataPlus;
+        let xErrorsTempMinus = channel.objects[propertyName].m_XErrorDataMinus;
+        let yErrorsTempPlus = channel.objects[propertyName].m_YErrorDataPlus;
+        let yErrorsTempMinus = channel.objects[propertyName].m_YErrorDataMinus;  
         let dataLabel = channel.objects[propertyName].m_Label;
         dataLabels.push(dataLabel);
 
         console.log("loading datalabel: "+dataLabel);
 
         //add label to x array
         xDataTemp.unshift('x'+count.toString())
         xs[dataLabel] = 'x' + count.toString()
 
         xDataTemp.push(null); //append null value, to make sure the last tick on x-axis is displayed correctly
         yDataTemp.unshift(dataLabel)
         yDataTemp.push(null); //append null value, to make sure the last tick on y-axis is displayed correctly
 
         xValues[count] = xDataTemp
         yValues[count] = yDataTemp
         xErrorValuesPlus[count] = xErrorsTempPlus;
-		xErrorValuesMinus[count] = xErrorsTempMinus;
-		yErrorValuesPlus[count] = yErrorsTempPlus;
-		yErrorValuesMinus[count] = yErrorsTempMinus;
-		
+        xErrorValuesMinus[count] = xErrorsTempMinus;
+        yErrorValuesPlus[count] = yErrorsTempPlus;
+        yErrorValuesMinus[count] = yErrorsTempMinus;
+    
 
         var tempLineStyle = '';
 
         if (channel.objects[propertyName].m_LineStyleName == "solid")
-  			{
-  			  tempLineStyle = ''
-  			}
-  			else
-  			{
-  			  tempLineStyle = "dashed"
-  			}
+        {
+          tempLineStyle = ''
+        }
+        else
+        {
+          tempLineStyle = "dashed"
+        }
 
         dataProperties[dataLabel] = {
             "color" : channel.objects[propertyName].m_Color,
             "chartType": channel.objects[propertyName].m_ChartType,
             "style": tempLineStyle
         }
 
-  			count++;
-  		}
-  	}
+        count++;
+      }
+    }
 	var theme = chartData.m_themeName;
 	setThemeColors(theme);
     generateChart(chartData);
   });
 }
 
 /**
  * Inits the height of the chart element to 90% of the full window height.
  */
 function initHeight() {
   var size = window.innerHeight-(window.innerHeight/100*10); //subtract 10% of height to hide vertical scrool bar
   let chart = document.getElementById("chart");
   chart.style.height = `${size}px`;
 }
 
 function getPlotlyChartType(inputType){
   let plotlyType = inputType;
   if (inputType == "line"){
     plotlyType = "scatter";
   } else if (inputType == "scatter"){
     plotlyType = "scatterOnly"
   }
   return plotlyType;
 }
 
 /**
  * Generate error bars object
  *
  * @param {array} errors - contains error bar values
  * @return error bar object
  */
 function generateErrorBars(errors, visible){
 	let errorObject = {
 	  type: 'data',
 	  array: errors,
 	  visible: visible
 	}
 
 	return errorObject;
 }
 
 function generateErrorBarsAsymmetric(errorsPlus, errorsMinus, visible){
 	let errorObject = generateErrorBars(errorsPlus, visible);
 	errorObject["arrayminus"] = errorsMinus;
 	errorObject["symmetric"] = false;
 	
 	return errorObject;
 }
 
-/**
- * Here, the chart magic takes place. Plot.ly is called.
- *
- * @param {object} chartData - containing the options for plotting, not the actual values
- */
-function generateChart(chartData)
-{
-  console.log("generate chart");
-	if (chartData == undefined)
-	{
-		chartData = {}
-	}
+function generateStackPlotData(){
+  let data = [];
 
-	if (dataLabels == undefined)
-	{
-    dataLabels = []
-	}
+  for (let index = 0; index < dataLabels.length; index++){
+    let trace = {
+      x: xValues[index].slice(1),
+      y: yValues[index].slice(1),
+      stackgroup: 'one',
+      name: dataLabels[index]
+    };
 
-  //=============================== DATA ========================
+    data.push(trace);
+  }
+  return data;
+}
+
+function generatePlotData(){
   let data = [];
 
   for (let index = 0; index < dataLabels.length; index++){
 
     let inputType = dataProperties[dataLabels[index]]["chartType"];
     let chartType = getPlotlyChartType(inputType);
 
     let trace = {
       x: xValues[index].slice(1),
       y: yValues[index].slice(1),
       type: chartType,
       name: dataLabels[index]
     };
 
 	  if(typeof xErrorValuesPlus[index] !== 'undefined'){
 		  if(typeof xErrorValuesMinus[index] !== 'undefined' && xErrorValuesMinus[index].length > 0)
 		  {
 			trace["error_x"] = generateErrorBarsAsymmetric(xErrorValuesPlus[index], xErrorValuesMinus[index], chartData.m_ShowErrorBars);
 		  }else{
 			trace["error_x"] = generateErrorBars(xErrorValuesPlus[index], chartData.m_ShowErrorBars);
 		  }
 	  }
 	  
 	  if(typeof yErrorValuesPlus[index] !== 'undefined'){
 		  if(typeof yErrorValuesMinus[index] !== 'undefined' && yErrorValuesMinus[index].length > 0)
 		  {
 			trace["error_y"] = generateErrorBarsAsymmetric(yErrorValuesPlus[index], yErrorValuesMinus[index], chartData.m_ShowErrorBars);
 		  }else{
 			trace["error_y"] = generateErrorBars(yErrorValuesPlus[index], chartData.m_ShowErrorBars);
 		  }
 	  }
 
     // ===================== CHART TYPE OPTIONS HANDLING ===========
     // initialize line object
     trace["line"] = {}
 
     if (chartType == "scatter"){
       trace["line"]["color"] = dataProperties[dataLabels[index]]["color"]
     } else if (chartType == "area"){
       trace["fill"] = 'tozeroy'
     } else if (chartType == "spline"){
       trace["line"]["shape"] = 'spline'
     } else if (chartType == "scatterOnly"){
       trace["mode"] = 'markers';
     } else if (chartType == "area-spline"){
       trace["fill"] = 'tozeroy'
       trace["line"]["shape"] = 'spline'
     }
 
     if (dataProperties[dataLabels[index]]["style"] == "dashed"){
-      console.log("use dot")
       trace["line"]["dash"] = "dot"
     }
 
     data.push(trace)
   }
+  return data;
+}
 
+/**
+ * Here, the chart magic takes place. Plot.ly is called.
+ *
+ * @param {object} chartData - containing the options for plotting, not the actual values
+ */
+function generateChart(chartData)
+{
+  console.log("generate chart");
+	if (chartData == undefined)
+	{
+		chartData = {}
+	}
+
+	if (dataLabels == undefined)
+	{
+    dataLabels = []
+	}
+
+  //=============================== DATA ========================
+  var data = [];
+  if (chartData.m_StackedData){
+    data = generateStackPlotData();
+  } else {
+    data = generatePlotData();
+  }
   //=============================== STYLE ========================
   let marginTop = chartData.m_chartTitle == undefined ? 10 : 50;
 
   if (chartData.m_LegendPosition == "bottomMiddle"){
 	  var legendX = 0.5;
 	  var legendY = -0.75;
   }
   else if (chartData.m_LegendPosition == "bottomRight"){
 	  var legendX = 1;
 	  var legendY = 0;
   }
   else if (chartData.m_LegendPosition == "topRight"){
 	  var legendX = 1;
 	  var legendY = 1;
   }
   else if (chartData.m_LegendPosition == "topLeft"){
 	  var legendX = 0;
 	  var legendY = 1;
   }
   else if (chartData.m_LegendPosition == "middleRight"){
 	  var legendX = 1;
 	  var legendY = 0.5;
   }
   var layout = {
 	  paper_bgcolor : backgroundColor,
 	  plot_bgcolor : backgroundColor,
     title: {
 		text:chartData.m_chartTitle,
 		font: {
 		color: foregroundColor
 		}
 	},
     xaxis: {
       title: {
 		text: chartData.m_xAxisLabel
 	  },
 	  color: foregroundColor
     },
     yaxis: {
       title: {
 		text:chartData.m_yAxisLabel
 	  },
 	  color: foregroundColor
     },
     margin: {
       l: 50,
       r: 10,
       b: 50,
       t: marginTop,
       pad: 4
     },
 	showlegend: chartData.m_ShowLegend,
 	legend: {
 		x: legendX,
 		y: legendY,
 		font : {
 			color: foregroundColor
 		}
 	}
   };
 
   if (chartData.m_YAxisScale){
       layout.yaxis["type"] = "log"
   }
 
   if (chartData.m_ShowSubchart){
     layout.xaxis.rangeslider = {}; // adds range slider below x axis
   }
 
   Plotly.newPlot('chart', data, layout, {displayModeBar: false, responsive: true});
 }
 
 /**
  * Change theme of chart.
  *
  * @param {string} color - dark or not dark
  */
 function changeTheme(color) {
 	setThemeColors(color);
 link = document.getElementsByTagName("link")[0];
   if (color == 'dark') {
     link.href = "Chart_dark.css";
   }
   else
   {
     link.href = "Chart.css";
   }
 };
 
 /**
  * Reload the chart with the given arguments.
  *
  * This method is called by C++. Changes on signature with caution.
  */
 function Reload(){
   console.log("Reload chart");
   generateChart(chartData);
 }
 
 function SetShowSubchart(showSubchart)
 {
     chartData.m_ShowSubchart = showSubchart;
 }
 
 function setThemeColors(theme){
 	if (theme == 'dark'){
 		backgroundColor = '#2d2d30';
 		foregroundColor = 'white';
 	}
 	else {
 		backgroundColor = '#f0f0f0';
 		foregroundColor = 'black';
 	}
 }
 
 function SetStackDataString(stackDataString)
 {
   chartData.m_StackedData = stackDataString;
 }
 
 function SetShowErrorBars(showErrorBars)
 {
   chartData.m_ShowErrorBars = showErrorBars;
 }
 /**
  * Transforms the view to another chart type.
  *
  * This method is called by C++. Changes on signature with caution.
  * @param {string} transformTo - 'line' or 'bar'
  */
 function transformView(transformTo) {
   console.log("transform view");
   console.log(transformTo);
 
   dataProperties[dataLabels[0]]["chartType"] = transformTo; // preserve chartType for later updates
   let plotlyType = getPlotlyChartType(transformTo);
   let chart = document.getElementById("chart");
   let update = {type : plotlyType}
   Plotly.restyle(chart, update, 0); // updates the given plotly trace at index 0 with an update object built of a standard trace object
 };
diff --git a/Modules/Chart/src/QmitkChartWidget.cpp b/Modules/Chart/src/QmitkChartWidget.cpp
index 5851d313ac..9752ea40f0 100644
--- a/Modules/Chart/src/QmitkChartWidget.cpp
+++ b/Modules/Chart/src/QmitkChartWidget.cpp
@@ -1,646 +1,652 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 #include <regex>
 
 #include <QGridLayout>
 #include <QWebChannel>
 #include <QWebEngineSettings>
 #include <QWebEngineView>
 #include <QmitkChartWidget.h>
 
 #include "mitkExceptionMacro.h"
 #include <QmitkChartData.h>
 #include <QmitkChartxyData.h>
 
 class CustomPage : public QWebEnginePage
 {
 public:
   CustomPage(QObject *parent = 0) : QWebEnginePage(parent) {}
   virtual void javaScriptConsoleMessage(JavaScriptConsoleMessageLevel /*level*/,
                                         const QString &message,
                                         int lineNumber,
                                         const QString & /*sourceID*/)
   {
     MITK_INFO << "JS > " << lineNumber << ": " << message.toStdString();
   }
 };
 
 class QmitkChartWidget::Impl final
 {
 public:
   explicit Impl(QWidget *parent);
   ~Impl();
 
   Impl(const Impl &) = delete;
   Impl &operator=(const Impl &) = delete;
 
   void AddData1D(const std::vector<double> &data1D, const std::string &label, QmitkChartWidget::ChartType chartType);
   void AddData2D(const std::map<double, double> &data2D,
                  const std::string &label,
                  QmitkChartWidget::ChartType chartType);
 
   void RemoveData(const std::string &label);
 
   void ClearData();
 
   void SetColor(const std::string &label, const std::string &colorName);
   void SetLineStyle(const std::string &label, LineStyle style);
 
   void SetYAxisScale(AxisScale scale);
 
   void SetXAxisLabel(const std::string &label);
 
   void SetYAxisLabel(const std::string &label);
 
   void SetTitle(const std::string &title);
 
   void SetXErrorBars(const std::string &label,
                      const std::vector<double> &errorPlus,
                      const std::vector<double> &errorMinus = std::vector<double>());
   void SetYErrorBars(const std::string &label,
                      const std::vector<double> &errorPlus,
                      const std::vector<double> &errorMinus = std::vector<double>());
   std::string GetThemeName() const;
   void SetThemeName(ColorTheme style);
 
   void SetChartType(QmitkChartWidget::ChartType chartType);
   void SetLegendPosition(LegendPosition position);
   void SetChartTypeByLabel(const std::string &label, QmitkChartWidget::ChartType chartType);
 
   void Show(bool showSubChart);
 
   void SetShowLegend(bool show);
   void SetShowErrorBars(bool show);
 
+  void SetStackedData(bool stacked);
+
   void SetShowDataPoints(bool showDataPoints = false);
 
   void SetChartType(const std::string &label, QmitkChartWidget::ChartType chartType);
   QList<QVariant> ConvertErrorVectorToQList(const std::vector<double> &error);
 
   std::string ConvertChartTypeToString(QmitkChartWidget::ChartType chartType) const;
 
   void ClearJavaScriptChart();
   void InitializeJavaScriptChart();
   void CallJavaScriptFuntion(const QString &command);
 
   QSize sizeHint() const;
 
 private:
   using ChartxyDataVector = std::vector<std::unique_ptr<QmitkChartxyData>>;
   std::string GetUniqueLabelName(const QList<QVariant> &labelList, const std::string &label) const;
   QmitkChartxyData *GetDataElementByLabel(const std::string &label) const;
   QList<QVariant> GetDataLabels(const ChartxyDataVector &c3xyData) const;
 
   QWebChannel *m_WebChannel;
   QWebEngineView *m_WebEngineView;
 
   QmitkChartData m_C3Data;
   ChartxyDataVector m_C3xyData;
   std::map<QmitkChartWidget::ChartType, std::string> m_ChartTypeToName;
   std::map<QmitkChartWidget::ColorTheme, std::string> m_ColorThemeToName;
   std::map<QmitkChartWidget::LegendPosition, std::string> m_LegendPositionToName;
   std::map<QmitkChartWidget::LineStyle, std::string> m_LineStyleToName;
   std::map<QmitkChartWidget::AxisScale, std::string> m_AxisScaleToName;
 };
 
 std::string QmitkChartWidget::Impl::GetThemeName() const {
   return m_C3Data.GetThemeName().toString().toStdString();
 }
 
 QmitkChartWidget::Impl::Impl(QWidget *parent)
   : m_WebChannel(new QWebChannel(parent)), m_WebEngineView(new QWebEngineView(parent))
 {
   // disable context menu for QWebEngineView
   m_WebEngineView->setContextMenuPolicy(Qt::NoContextMenu);
 
   m_WebEngineView->setPage(new CustomPage());
 
   // Set the webengineview to an initial empty page. The actual chart will be loaded once the data is calculated.
 
   m_WebEngineView->load(QUrl(QStringLiteral("qrc:///Chart/empty.html")));
   m_WebEngineView->page()->setWebChannel(m_WebChannel);
 
   m_WebEngineView->settings()->setAttribute(QWebEngineSettings::FocusOnNavigationEnabled, false);
 
   connect(m_WebEngineView, SIGNAL(loadFinished(bool)), parent, SLOT(OnLoadFinished(bool)));
   auto layout = new QGridLayout(parent);
   layout->setMargin(0);
   layout->addWidget(m_WebEngineView);
   m_ChartTypeToName.emplace(ChartType::bar, "bar");
   m_ChartTypeToName.emplace(ChartType::line, "line");
   m_ChartTypeToName.emplace(ChartType::spline, "spline");
   m_ChartTypeToName.emplace(ChartType::pie, "pie");
   m_ChartTypeToName.emplace(ChartType::area, "area");
   m_ChartTypeToName.emplace(ChartType::area_spline, "area-spline");
   m_ChartTypeToName.emplace(ChartType::scatter, "scatter");
 
   m_LegendPositionToName.emplace(LegendPosition::bottomMiddle, "bottomMiddle");
   m_LegendPositionToName.emplace(LegendPosition::bottomRight, "bottomRight");
   m_LegendPositionToName.emplace(LegendPosition::topRight, "topRight");
   m_LegendPositionToName.emplace(LegendPosition::topLeft, "topLeft");
   m_LegendPositionToName.emplace(LegendPosition::middleRight, "middleRight");
 
   m_LineStyleToName.emplace(LineStyle::solid, "solid");
   m_LineStyleToName.emplace(LineStyle::dashed, "dashed");
 
   m_AxisScaleToName.emplace(AxisScale::linear, "");
   m_AxisScaleToName.emplace(AxisScale::log, "log");
 
   m_ColorThemeToName.emplace(ColorTheme::lightstyle, "light");
   m_ColorThemeToName.emplace(ColorTheme::darkstyle, "dark");
 }
 
 QmitkChartWidget::Impl::~Impl() {}
 
 std::string CheckForCorrectHex(const std::string &colorName)
 {
   std::regex rgx("([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})");
   std::smatch match;
 
   if (!colorName.empty() && colorName.at(0) != '#' && std::regex_search(colorName.begin(), colorName.end(), match, rgx))
   {
     return "#" + colorName;
   }
   else
   {
     return colorName;
   }
 }
 
 void QmitkChartWidget::Impl::AddData1D(const std::vector<double> &data1D,
                                        const std::string &label,
                                        QmitkChartWidget::ChartType type)
 {
   std::map<double, double> transformedData2D;
   unsigned int count = 0;
   // transform the 1D data to 2D data
   for (const auto &ele : data1D)
   {
     transformedData2D[count] = ele;
     count++;
   }
 
   AddData2D(transformedData2D, label, type);
 }
 
 void QmitkChartWidget::Impl::AddData2D(const std::map<double, double> &data2D,
                                        const std::string &label,
                                        QmitkChartWidget::ChartType type)
 {
   QMap<QVariant, QVariant> data2DConverted;
   for (const auto &aValue : data2D)
   {
     data2DConverted.insert(aValue.first, aValue.second);
   }
   const std::string chartTypeName(m_ChartTypeToName.at(type));
 
   auto definedLabels = GetDataLabels(m_C3xyData);
   auto uniqueLabel = GetUniqueLabelName(definedLabels, label);
   if (type == ChartType::scatter)
   {
     SetShowDataPoints(true);
     MITK_INFO << "Enabling data points for all because of scatter plot";
   }
 
   m_C3xyData.push_back(std::make_unique<QmitkChartxyData>(
     data2DConverted, QVariant(QString::fromStdString(uniqueLabel)), QVariant(QString::fromStdString(chartTypeName))));
 }
 
 void QmitkChartWidget::Impl::RemoveData(const std::string &label)
 {
   for (ChartxyDataVector::iterator iter = m_C3xyData.begin(); iter != m_C3xyData.end(); ++iter)
   {
     if ((*iter)->GetLabel().toString().toStdString() == label)
     {
       m_C3xyData.erase(iter);
       return;
     }
   }
 
   throw std::invalid_argument("Cannot Remove Data because the label does not exist.");
 }
 
 void QmitkChartWidget::Impl::ClearData()
 {
   for (auto &xyData : m_C3xyData)
   {
     m_WebChannel->deregisterObject(xyData.get());
   }
   m_C3xyData.clear();
 }
 
 void QmitkChartWidget::Impl::SetColor(const std::string &label, const std::string &colorName)
 {
   auto element = GetDataElementByLabel(label);
   if (element)
   {
     auto colorChecked = CheckForCorrectHex(colorName);
     element->SetColor(QVariant(QString::fromStdString(colorChecked)));
   }
 }
 
 void QmitkChartWidget::Impl::SetLineStyle(const std::string &label, LineStyle style)
 {
   auto element = GetDataElementByLabel(label);
   const std::string lineStyleName(m_LineStyleToName.at(style));
   element->SetLineStyle(QVariant(QString::fromStdString(lineStyleName)));
 }
 
 void QmitkChartWidget::Impl::SetYAxisScale(AxisScale scale)
 {
   const std::string axisScaleName(m_AxisScaleToName.at(scale));
   m_C3Data.SetYAxisScale(QString::fromStdString(axisScaleName));
 }
 
 QmitkChartxyData *QmitkChartWidget::Impl::GetDataElementByLabel(const std::string &label) const
 {
   for (const auto &qmitkChartxyData : m_C3xyData)
   {
     if (qmitkChartxyData->GetLabel().toString() == label.c_str())
     {
       return qmitkChartxyData.get();
     }
   }
   MITK_WARN << "label " << label << " not found in QmitkChartWidget";
   return nullptr;
 }
 
 QList<QVariant> QmitkChartWidget::Impl::GetDataLabels(const ChartxyDataVector &c3xyData) const
 {
   QList<QVariant> dataLabels;
   for (auto element = c3xyData.begin(); element != c3xyData.end(); ++element)
   {
     dataLabels.push_back((*element)->GetLabel());
   }
   return dataLabels;
 }
 
 void QmitkChartWidget::Impl::SetXAxisLabel(const std::string &label)
 {
   m_C3Data.SetXAxisLabel(QString::fromStdString(label));
 }
 
 void QmitkChartWidget::Impl::SetYAxisLabel(const std::string &label)
 {
   m_C3Data.SetYAxisLabel(QString::fromStdString(label));
 }
 
 void QmitkChartWidget::Impl::SetTitle(const std::string &title)
 {
   m_C3Data.SetTitle(QString::fromStdString(title));
 }
 
 void QmitkChartWidget::Impl::SetThemeName(QmitkChartWidget::ColorTheme style)
 {
   const std::string themeName(m_ColorThemeToName.at(style));
   m_C3Data.SetThemeName(QString::fromStdString(themeName));
 }
 
 void QmitkChartWidget::Impl::SetChartType(QmitkChartWidget::ChartType chartType)
 {
   for (auto iterator = m_C3xyData.begin(); iterator != m_C3xyData.end(); ++iterator)
   {
     SetChartTypeByLabel((*iterator)->GetLabel().toString().toStdString(), chartType);
   }
 
   auto chartTypeName = ConvertChartTypeToString(chartType);
   const QString command = QString::fromStdString("transformView('" + chartTypeName + "')");
   CallJavaScriptFuntion(command);
 }
 
 void QmitkChartWidget::Impl::SetChartTypeByLabel(const std::string &label, QmitkChartWidget::ChartType chartType)
 {
   auto element = GetDataElementByLabel(label);
   if (element)
   {
     if (chartType == ChartType::scatter)
     {
       SetShowDataPoints(true);
       MITK_INFO << "Enabling data points for all because of scatter plot";
     }
     auto chartTypeName = ConvertChartTypeToString(chartType);
     element->SetChartType(QVariant(QString::fromStdString(chartTypeName)));
   }
 }
 
 void QmitkChartWidget::Impl::SetLegendPosition(QmitkChartWidget::LegendPosition legendPosition)
 {
   const std::string legendPositionName(m_LegendPositionToName.at(legendPosition));
   m_C3Data.SetLegendPosition(QString::fromStdString(legendPositionName));
 }
 
 void QmitkChartWidget::Impl::Show(bool showSubChart)
 {
   if (m_C3xyData.empty())
   {
     MITK_WARN << "no data available for display in chart";
   }
   else
   {
     m_C3Data.SetAppearance(showSubChart, m_C3xyData.front()->GetChartType() == QVariant("pie"));
   }
 
   InitializeJavaScriptChart();
 }
 
 void QmitkChartWidget::Impl::SetShowLegend(bool show)
 {
   m_C3Data.SetShowLegend(show);
 }
 
+void QmitkChartWidget::Impl::SetStackedData(bool stacked)
+{
+  m_C3Data.SetStackedData(stacked);
+}
+
 void QmitkChartWidget::Impl::SetShowErrorBars(bool show)
 {
   m_C3Data.SetShowErrorBars(show);
 }
 
 void QmitkChartWidget::Impl::SetShowDataPoints(bool showDataPoints)
 {
   if (showDataPoints == true)
   {
     m_C3Data.SetDataPointSize(3);
   }
   else
   {
     m_C3Data.SetDataPointSize(0);
   }
 }
 
 void QmitkChartWidget::Impl::SetChartType(const std::string &label, QmitkChartWidget::ChartType chartType)
 {
   auto element = GetDataElementByLabel(label);
   if (element)
   {
     if (chartType == ChartType::scatter)
     {
       SetShowDataPoints(true);
       MITK_INFO << "Enabling data points for all because of scatter plot";
     }
     const std::string chartTypeName(m_ChartTypeToName.at(chartType));
     element->SetChartType(QVariant(QString::fromStdString(chartTypeName)));
   }
 }
 
 QList<QVariant> QmitkChartWidget::Impl::ConvertErrorVectorToQList(const std::vector<double> &error)
 {
   QList<QVariant> errorConverted;
   for (const auto &aValue : error)
   {
     errorConverted.append(aValue);
   }
 
   return errorConverted;
 }
 
 void QmitkChartWidget::Impl::SetXErrorBars(const std::string &label,
                                            const std::vector<double> &errorPlus,
                                            const std::vector<double> &errorMinus)
 {
   auto element = GetDataElementByLabel(label);
   if (element)
   {
     auto errorConvertedPlus = ConvertErrorVectorToQList(errorPlus);
     auto errorConvertedMinus = ConvertErrorVectorToQList(errorMinus);
 
     element->SetXErrorDataPlus(errorConvertedPlus);
     element->SetXErrorDataMinus(errorConvertedMinus);
   }
 }
 
 void QmitkChartWidget::Impl::SetYErrorBars(const std::string &label,
                                            const std::vector<double> &errorPlus,
                                            const std::vector<double> &errorMinus)
 {
   auto element = GetDataElementByLabel(label);
   if (element)
   {
     auto errorConvertedPlus = ConvertErrorVectorToQList(errorPlus);
     auto errorConvertedMinus = ConvertErrorVectorToQList(errorMinus);
 
     element->SetYErrorDataPlus(errorConvertedPlus);
     element->SetYErrorDataMinus(errorConvertedMinus);
   }
 }
 
 std::string QmitkChartWidget::Impl::ConvertChartTypeToString(QmitkChartWidget::ChartType chartType) const
 {
   return m_ChartTypeToName.at(chartType);
 }
 
 QSize QmitkChartWidget::Impl::sizeHint() const
 {
   return QSize(400, 300);
 }
 
 void QmitkChartWidget::Impl::CallJavaScriptFuntion(const QString &command)
 {
   m_WebEngineView->page()->runJavaScript(command);
 }
 
 void QmitkChartWidget::Impl::ClearJavaScriptChart()
 {
   m_WebEngineView->load(QUrl(QStringLiteral("qrc:///Chart/empty.html")));
 }
 
 void QmitkChartWidget::Impl::InitializeJavaScriptChart()
 {
   m_WebChannel->registerObject(QStringLiteral("chartData"), &m_C3Data);
   unsigned count = 0;
   for (auto &xyData : m_C3xyData)
   {
     QString variableName = "xyData" + QString::number(count);
     m_WebChannel->registerObject(variableName, xyData.get());
     count++;
   }
 
   m_WebEngineView->load(QUrl(QStringLiteral("qrc:///Chart/QmitkChartWidget.html")));
 }
 
 std::string QmitkChartWidget::Impl::GetUniqueLabelName(const QList<QVariant> &labelList, const std::string &label) const
 {
   QString currentLabel = QString::fromStdString(label);
   int counter = 0;
   while (labelList.contains(currentLabel))
   {
     currentLabel = QString::fromStdString(label + std::to_string(counter));
     counter++;
   }
   return currentLabel.toStdString();
 }
 
 QmitkChartWidget::QmitkChartWidget(QWidget *parent) : QWidget(parent), m_Impl(new Impl(this)) {
   connect(this, &QmitkChartWidget::PageSuccessfullyLoaded, this, &QmitkChartWidget::OnPageSuccessfullyLoaded);
 }
 
 QmitkChartWidget::~QmitkChartWidget() {}
 
 void QmitkChartWidget::AddData2D(const std::map<double, double> &data2D, const std::string &label, ChartType type)
 {
   m_Impl->AddData2D(data2D, label, type);
 }
 
 void QmitkChartWidget::SetColor(const std::string &label, const std::string &colorName)
 {
   m_Impl->SetColor(label, colorName);
 }
 
 void QmitkChartWidget::SetLineStyle(const std::string &label, LineStyle style)
 {
   m_Impl->SetLineStyle(label, style);
 }
 
 void QmitkChartWidget::SetYAxisScale(AxisScale scale)
 {
   m_Impl->SetYAxisScale(scale);
 }
 
 void QmitkChartWidget::AddData1D(const std::vector<double> &data1D, const std::string &label, ChartType type)
 {
   m_Impl->AddData1D(data1D, label, type);
 }
 
 void QmitkChartWidget::RemoveData(const std::string &label)
 {
   m_Impl->RemoveData(label);
 }
 
 void QmitkChartWidget::SetXAxisLabel(const std::string &label)
 {
   m_Impl->SetXAxisLabel(label);
 }
 
 void QmitkChartWidget::SetYAxisLabel(const std::string &label)
 {
   m_Impl->SetYAxisLabel(label);
 }
 
 void QmitkChartWidget::SetTitle(const std::string &title)
 {
   m_Impl->SetTitle(title);
 }
 
 void QmitkChartWidget::SetShowDataPoints(bool showDataPoints)
 {
   m_Impl->SetShowDataPoints(showDataPoints);
 }
 
 void QmitkChartWidget::SetChartType(const std::string &label, ChartType type)
 {
   m_Impl->SetChartType(label, type);
 }
 
 void QmitkChartWidget::SetXErrorBars(const std::string &label,
                                      const std::vector<double> &errorPlus,
                                      const std::vector<double> &errorMinus)
 {
   m_Impl->SetXErrorBars(label, errorPlus, errorMinus);
 }
 
 void QmitkChartWidget::SetYErrorBars(const std::string &label,
                                      const std::vector<double> &errorPlus,
                                      const std::vector<double> &errorMinus)
 {
   m_Impl->SetYErrorBars(label, errorPlus, errorMinus);
 }
 
 void QmitkChartWidget::SetLegendPosition(LegendPosition position)
 {
   m_Impl->SetLegendPosition(position);
 }
 
 void QmitkChartWidget::SetShowLegend(bool show)
 {
   m_Impl->SetShowLegend(show);
 }
 
 void QmitkChartWidget::SetStackedData(bool stacked)
 {
-  Q_UNUSED(stacked) // this is a temporary solution and will be changed as soon as this method is implemented
-  MITK_WARN << "not yet implemented";
+  m_Impl->SetStackedData(stacked);
 }
 
 void QmitkChartWidget::Show(bool showSubChart)
 {
   m_Impl->Show(showSubChart);
 }
 
 void QmitkChartWidget::Clear()
 {
   m_Impl->ClearData();
   m_Impl->ClearJavaScriptChart();
 }
 
 void QmitkChartWidget::OnLoadFinished(bool isLoadSuccessful)
 {
   if (isLoadSuccessful)
   {
     emit PageSuccessfullyLoaded();
   }
 }
 
 void QmitkChartWidget::OnPageSuccessfullyLoaded() {
   auto themeName = m_Impl->GetThemeName();
   QString command;
   if (themeName == "dark")
   {
     command = QString("changeTheme('dark')");
   }
   else
   {
     command = QString("changeTheme('light')");
   }
 
   m_Impl->CallJavaScriptFuntion(command);
 }
 
 std::string QmitkChartWidget::convertBooleanValue(bool value) const {
   std::stringstream converter;
   converter << std::boolalpha << value;
   return converter.str();
 }
 
 void QmitkChartWidget::SetChartTypeForAllDataAndReload(ChartType type)
 {
   m_Impl->SetChartType(type);
 }
 
 void QmitkChartWidget::SetTheme(ColorTheme themeEnabled)
 {
   m_Impl->SetThemeName(themeEnabled);
 }
 
 void QmitkChartWidget::SetShowSubchart(bool showSubChart)
 {
   QString subChartString = QString::fromStdString(convertBooleanValue(showSubChart));
   const QString command = QString("SetShowSubchart(" + subChartString + ")");
   m_Impl->CallJavaScriptFuntion(command);
 }
 
 void QmitkChartWidget::SetShowErrorBars(bool showErrorBars)
 {
   m_Impl->SetShowErrorBars(showErrorBars);
 }
 
 void QmitkChartWidget::Reload()
 {
   const QString command = QString("Reload()");
   m_Impl->CallJavaScriptFuntion(command);
 }
 
 QSize QmitkChartWidget::sizeHint() const
 {
   return m_Impl->sizeHint();
 }