Add initial support for XY plotting (#218 and #157)

app/qml/MainWindow/Dashboard/WidgetGrid.qml

@@ -66,9 +66,10 @@ Widgets.Pane {
     Rectangle {
       z: 2
       id: header
-      height: actionsLayout.implicitHeight + 12
-      visible: Cpp_UI_Dashboard.actionCount > 0
       color: Cpp_ThemeManager.colors["groupbox_background"]
+      height: visible ? actionsLayout.implicitHeight + 12 : 0
+      visible: Cpp_UI_Dashboard.actionCount > 0 && !Cpp_CSV_Player.isOpen
+
       anchors {
         top: parent.top
         left: parent.left
@@ -122,8 +123,8 @@ Widgets.Pane {
       contentWidth: width
       anchors.leftMargin: 8
       anchors.bottomMargin: 8
-      anchors.topMargin: header.height + 8
       contentHeight: grid.height
+      anchors.topMargin: header.height + 8
 
       ScrollBar.vertical: ScrollBar {
         id: scroll

app/qml/Widgets/Dashboard/Plot.qml

@@ -56,9 +56,9 @@ Item {
     xMax: root.model.maxX
     yMin: root.model.minY
     yMax: root.model.maxY
-    xLabel: qsTr("Samples")
     curveColors: [root.color]
     yLabel: root.model.yLabel
+    xLabel: root.model.xLabel
     xAxis.tickInterval: root.model.xTickInterval
     yAxis.tickInterval: root.model.yTickInterval
     Component.onCompleted: graph.addSeries(lineSeries)

app/src/JSON/Action.cpp

@@ -22,6 +22,30 @@
 
 #include "JSON/Action.h"
 
+/**
+ * @brief Reads a value from a QJsonObject based on a key, returning a default
+ *        value if the key does not exist.
+ *
+ * This function checks if the given key exists in the provided QJsonObject.
+ * If the key is found, it returns the associated value. Otherwise, it returns
+ * the specified default value.
+ *
+ * @param object The QJsonObject to read the data from.
+ * @param key The key to look for in the QJsonObject.
+ * @param defaultValue The value to return if the key is not found in the
+ * QJsonObject.
+ * @return The value associated with the key, or the defaultValue if the key is
+ * not present.
+ */
+static QVariant SAFE_READ(const QJsonObject &object, const QString &key,
+                          const QVariant &defaultValue)
+{
+  if (object.contains(key))
+    return object.value(key);
+
+  return defaultValue;
+}
+
 /**
  * @brief Constructs an Action object with a specified action ID.
  *
@@ -124,11 +148,10 @@ bool JSON::Action::read(const QJsonObject &object)
 {
   if (!object.isEmpty())
   {
-    m_icon = object.value(QStringLiteral("icon")).toString();
+    m_txData = SAFE_READ(object, "txData", "").toString();
-    m_txData = object.value(QStringLiteral("txData")).toString();
+    m_eolSequence = SAFE_READ(object, "eol", "").toString();
-    m_eolSequence = object.value(QStringLiteral("eol")).toString();
+    m_icon = SAFE_READ(object, "icon", "").toString().simplified();
-    m_title = object.value(QStringLiteral("title")).toString().simplified();
+    m_title = SAFE_READ(object, "title", "").toString().simplified();
-
     return true;
   }
 

app/src/JSON/Dataset.cpp

@@ -22,6 +22,33 @@
 
 #include "JSON/Dataset.h"
 
+/**
+ * @brief Reads a value from a QJsonObject based on a key, returning a default
+ *        value if the key does not exist.
+ *
+ * This function checks if the given key exists in the provided QJsonObject.
+ * If the key is found, it returns the associated value. Otherwise, it returns
+ * the specified default value.
+ *
+ * @param object The QJsonObject to read the data from.
+ * @param key The key to look for in the QJsonObject.
+ * @param defaultValue The value to return if the key is not found in the
+ * QJsonObject.
+ * @return The value associated with the key, or the defaultValue if the key is
+ * not present.
+ */
+static QVariant SAFE_READ(const QJsonObject &object, const QString &key,
+                          const QVariant &defaultValue)
+{
+  if (object.contains(key))
+    return object.value(key);
+
+  return defaultValue;
+}
+
+/**
+ * @brief Constructor function, initializes default values
+ */
 JSON::Dataset::Dataset(const int groupId, const int datasetId)
   : m_fft(false)
   , m_led(false)
@@ -36,6 +63,7 @@ JSON::Dataset::Dataset(const int groupId, const int datasetId)
   , m_min(0)
   , m_alarm(0)
   , m_ledHigh(1)
+  , m_xAxisId(-1)
   , m_fftSamples(256)
   , m_fftSamplingRate(100)
   , m_groupId(groupId)
@@ -147,6 +175,15 @@ const QString &JSON::Dataset::widget() const
   return m_widget;
 }
 
+/**
+ * @return The frame index for the data source for the x-axis, -1 when the
+ *         x axis data should be automatically generated by Serial Studio.
+ */
+int JSON::Dataset::xAxisId() const
+{
+  return m_xAxisId;
+}
+
 /**
  * Returns the maximum freq. for the FFT transform
  */
@@ -210,6 +247,7 @@ QJsonObject JSON::Dataset::serialize() const
   object.insert(QStringLiteral("index"), m_index);
   object.insert(QStringLiteral("alarm"), m_alarm);
   object.insert(QStringLiteral("graph"), m_graph);
+  object.insert(QStringLiteral("xAxis"), m_xAxisId);
   object.insert(QStringLiteral("ledHigh"), m_ledHigh);
   object.insert(QStringLiteral("fftSamples"), m_fftSamples);
   object.insert(QStringLiteral("value"), m_value.simplified());
@@ -229,21 +267,22 @@ bool JSON::Dataset::read(const QJsonObject &object)
 {
   if (!object.isEmpty())
   {
-    m_fft = object.value(QStringLiteral("fft")).toBool();
+    m_min = SAFE_READ(object, "min", 0).toDouble();
-    m_led = object.value(QStringLiteral("led")).toBool();
+    m_max = SAFE_READ(object, "max", 0).toDouble();
-    m_log = object.value(QStringLiteral("log")).toBool();
+    m_index = SAFE_READ(object, "index", 0).toInt();
-    m_min = object.value(QStringLiteral("min")).toDouble();
+    m_fft = SAFE_READ(object, "fft", false).toBool();
-    m_max = object.value(QStringLiteral("max")).toDouble();
+    m_led = SAFE_READ(object, "led", false).toBool();
-    m_index = object.value(QStringLiteral("index")).toInt();
+    m_log = SAFE_READ(object, "log", false).toBool();
-    m_alarm = object.value(QStringLiteral("alarm")).toDouble();
+    m_xAxisId = SAFE_READ(object, "xAxis", 0).toInt();
-    m_graph = object.value(QStringLiteral("graph")).toBool();
+    m_alarm = SAFE_READ(object, "alarm", 0).toDouble();
-    m_ledHigh = object.value(QStringLiteral("ledHigh")).toDouble();
+    m_graph = SAFE_READ(object, "graph", false).toBool();
-    m_fftSamples = object.value(QStringLiteral("fftSamples")).toInt();
+    m_ledHigh = SAFE_READ(object, "ledHigh", 0).toDouble();
-    m_title = object.value(QStringLiteral("title")).toString().simplified();
+    m_fftSamples = SAFE_READ(object, "fftSamples", 256).toInt();
-    m_value = object.value(QStringLiteral("value")).toString().simplified();
+    m_title = SAFE_READ(object, "title", "").toString().simplified();
-    m_units = object.value(QStringLiteral("units")).toString().simplified();
+    m_value = SAFE_READ(object, "value", "").toString().simplified();
-    m_widget = object.value(QStringLiteral("widget")).toString().simplified();
+    m_units = SAFE_READ(object, "units", "").toString().simplified();
-    m_fftSamplingRate = object.value(QStringLiteral("fftSamplingRate")).toInt();
+    m_widget = SAFE_READ(object, "widget", "").toString().simplified();
+    m_fftSamplingRate = SAFE_READ(object, "fftSamplingRate", 100).toInt();
     if (m_value.isEmpty())
       m_value = QStringLiteral("--.--");
 

app/src/JSON/Dataset.h

@@ -83,6 +83,8 @@ public:
   [[nodiscard]] double max() const;
   [[nodiscard]] double alarm() const;
   [[nodiscard]] double ledHigh() const;
+
+  [[nodiscard]] int xAxisId() const;
   [[nodiscard]] int fftSamples() const;
   [[nodiscard]] int fftSamplingRate() const;
 
@@ -121,6 +123,7 @@ private:
   int m_fftSamplingRate;
 
   int m_groupId;
+  int m_xAxisId;
   int m_datasetId;
 
   friend class JSON::ProjectModel;

app/src/JSON/Frame.cpp

@@ -22,6 +22,30 @@
 
 #include "JSON/Frame.h"
 
+/**
+ * @brief Reads a value from a QJsonObject based on a key, returning a default
+ *        value if the key does not exist.
+ *
+ * This function checks if the given key exists in the provided QJsonObject.
+ * If the key is found, it returns the associated value. Otherwise, it returns
+ * the specified default value.
+ *
+ * @param object The QJsonObject to read the data from.
+ * @param key The key to look for in the QJsonObject.
+ * @param defaultValue The value to return if the key is not found in the
+ * QJsonObject.
+ * @return The value associated with the key, or the defaultValue if the key is
+ * not present.
+ */
+static QVariant SAFE_READ(const QJsonObject &object, const QString &key,
+                          const QVariant &defaultValue)
+{
+  if (object.contains(key))
+    return object.value(key);
+
+  return defaultValue;
+}
+
 /**
  * Destructor function, free memory used by the @c Group objects before
  * destroying an instance of this class.
@@ -96,16 +120,15 @@ bool JSON::Frame::read(const QJsonObject &object)
   // Get title & groups array
   const auto groups = object.value(QStringLiteral("groups")).toArray();
   const auto actions = object.value(QStringLiteral("actions")).toArray();
-  const auto title
+  const auto title = SAFE_READ(object, "title", "").toString().simplified();
-      = object.value(QStringLiteral("title")).toString().simplified();
 
   // We need to have a project title and at least one group
   if (!title.isEmpty() && !groups.isEmpty())
   {
     // Update title
     m_title = title;
-    m_frameEnd = object.value(QStringLiteral("frameEnd")).toString();
+    m_frameEnd = SAFE_READ(object, "frameEnd", "").toString();
-    m_frameStart = object.value(QStringLiteral("frameStart")).toString();
+    m_frameStart = SAFE_READ(object, "frameStart", "").toString();
 
     // Generate groups & datasets from data frame
     for (auto i = 0; i < groups.count(); ++i)

app/src/JSON/Group.cpp

@@ -23,6 +23,30 @@
 #include <QJsonArray>
 #include "JSON/Group.h"
 
+/**
+ * @brief Reads a value from a QJsonObject based on a key, returning a default
+ *        value if the key does not exist.
+ *
+ * This function checks if the given key exists in the provided QJsonObject.
+ * If the key is found, it returns the associated value. Otherwise, it returns
+ * the specified default value.
+ *
+ * @param object The QJsonObject to read the data from.
+ * @param key The key to look for in the QJsonObject.
+ * @param defaultValue The value to return if the key is not found in the
+ * QJsonObject.
+ * @return The value associated with the key, or the defaultValue if the key is
+ * not present.
+ */
+static QVariant SAFE_READ(const QJsonObject &object, const QString &key,
+                          const QVariant &defaultValue)
+{
+  if (object.contains(key))
+    return object.value(key);
+
+  return defaultValue;
+}
+
 /**
  * @brief Constructor function
  */
@@ -78,8 +102,8 @@ bool JSON::Group::read(const QJsonObject &object)
   {
     // clang-format off
     const auto array = object.value(QStringLiteral("datasets")).toArray();
-    const auto title = object.value(QStringLiteral("title")).toString().simplified();
+    const auto title = SAFE_READ(object, "title", "").toString().simplified();
-    const auto widget = object.value(QStringLiteral("widget")).toString().simplified();
+    const auto widget = SAFE_READ(object, "widget", "").toString().simplified();
     // clang-format on
 
     if (!title.isEmpty() && !array.isEmpty())

app/src/JSON/ProjectModel.cpp

@@ -86,6 +86,7 @@ typedef enum
   kDatasetView_Alarm,            /**< Represents the dataset alarm value item. */
   kDatasetView_FFT_Samples,      /**< Represents the FFT window size item. */
   kDatasetView_FFT_SamplingRate, /**< Represents the FFT sampling rate item. */
+  kDatasetView_xAxis             /**< Represents the plot X axis item. */
 } DatasetItem;
 // clang-format on
 
@@ -347,6 +348,39 @@ QString JSON::ProjectModel::selectedIcon() const
   return data.toString();
 }
 
+/**
+ * @brief Retrieves a list of available X-axis data sources.
+ *
+ * This function returns a list of X-axis data source names. It includes a
+ * default entry ("Samples") and all registered datasets from the project model.
+ * Each dataset is identified by its title and the title of the group it belongs
+ * to.
+ *
+ * @return A `QStringList` containing the names of X-axis data sources.
+ */
+QStringList JSON::ProjectModel::xDataSources() const
+{
+  QStringList list;
+  list.append(tr("Samples"));
+
+  QMap<int, QString> registeredDatasets;
+  for (const auto &group : m_groups)
+  {
+    for (const auto &dataset : group.datasets())
+    {
+      const auto index = dataset.index();
+      if (!registeredDatasets.contains(index))
+      {
+        const auto t = QString("%1 (%2)").arg(dataset.title(), group.title());
+        registeredDatasets.insert(index, t);
+        list.append(t);
+      }
+    }
+  }
+
+  return list;
+}
+
 /**
  * @brief Retrieves the project title.
  *
@@ -2315,6 +2349,7 @@ void JSON::ProjectModel::buildDatasetModel(const JSON::Dataset &dataset)
   const bool showWidget = currentDatasetIsEditable();
   const bool showFFTOptions = dataset.fft();
   const bool showLedOptions = dataset.led();
+  const bool showPlotOptions = dataset.graph();
   const bool showMinMax = dataset.graph() || dataset.widget() == "gauge"
                           || dataset.widget() == "bar"
                           || m_selectedGroup.widget() == "multiplot";
@@ -2388,6 +2423,90 @@ void JSON::ProjectModel::buildDatasetModel(const JSON::Dataset &dataset)
     m_datasetModel->appendRow(widget);
   }
 
+  // Get appropiate plotting mode index for current dataset
+  int plotIndex = 0;
+  bool found = false;
+  const auto currentPair = qMakePair(dataset.graph(), dataset.log());
+  for (auto it = m_plotOptions.begin(); it != m_plotOptions.end();
+       ++it, ++plotIndex)
+  {
+    if (it.key() == currentPair)
+    {
+      found = true;
+      break;
+    }
+  }
+
+  // If not found, reset the index to 0
+  if (!found)
+    plotIndex = 0;
+
+  // Add plotting mode
+  auto plot = new QStandardItem();
+  plot->setEditable(true);
+  plot->setData(ComboBox, WidgetType);
+  plot->setData(m_plotOptions.values(), ComboBoxData);
+  plot->setData(plotIndex, EditableValue);
+  plot->setData(tr("Oscilloscope Plot"), ParameterName);
+  plot->setData(kDatasetView_Plot, ParameterType);
+  plot->setData(tr("Plot data in real-time"), ParameterDescription);
+  m_datasetModel->appendRow(plot);
+
+  // Add FFT checkbox
+  auto fft = new QStandardItem();
+  fft->setEditable(true);
+  fft->setData(CheckBox, WidgetType);
+  fft->setData(dataset.fft(), EditableValue);
+  fft->setData(tr("FFT Plot"), ParameterName);
+  fft->setData(kDatasetView_FFT, ParameterType);
+  fft->setData(0, PlaceholderValue);
+  fft->setData(tr("Plot frequency-domain data"), ParameterDescription);
+  m_datasetModel->appendRow(fft);
+
+  // Add LED panel checkbox
+  auto led = new QStandardItem();
+  led->setEditable(true);
+  led->setData(CheckBox, WidgetType);
+  led->setData(dataset.led(), EditableValue);
+  led->setData(tr("Show in LED Panel"), ParameterName);
+  led->setData(kDatasetView_LED, ParameterType);
+  led->setData(0, PlaceholderValue);
+  led->setData(tr("Quick status monitoring"), ParameterDescription);
+  m_datasetModel->appendRow(led);
+
+  // Add X-axis selector
+  if (showPlotOptions)
+  {
+    // Ensure X-axis ID is reset to "Samples" when an invalid index is set
+    int xAxisIdx = 0;
+    for (const auto &group : m_groups)
+    {
+      for (const auto &dataset : group.datasets())
+      {
+        const auto index = dataset.index();
+        if (index == m_selectedDataset.xAxisId())
+        {
+          xAxisIdx = index;
+          break;
+        }
+      }
+
+      if (xAxisIdx != 0)
+        break;
+    }
+
+    // Construct item
+    auto xAxis = new QStandardItem();
+    xAxis->setEditable(true);
+    xAxis->setData(ComboBox, WidgetType);
+    xAxis->setData(xAxisIdx, EditableValue);
+    xAxis->setData(xDataSources(), ComboBoxData);
+    xAxis->setData(kDatasetView_xAxis, ParameterType);
+    xAxis->setData(tr("X-Axis Source"), ParameterName);
+    xAxis->setData(tr("Data series for the X-Axis"), ParameterDescription);
+    m_datasetModel->appendRow(xAxis);
+  }
+
   // Add minimum/maximum values
   if (showMinMax)
   {
@@ -2431,46 +2550,6 @@ void JSON::ProjectModel::buildDatasetModel(const JSON::Dataset &dataset)
     m_datasetModel->appendRow(alarm);
   }
 
-  // Get appropiate plotting mode index for current dataset
-  int plotIndex = 0;
-  bool found = false;
-  const auto currentPair = qMakePair(dataset.graph(), dataset.log());
-  for (auto it = m_plotOptions.begin(); it != m_plotOptions.end();
-       ++it, ++plotIndex)
-  {
-    if (it.key() == currentPair)
-    {
-      found = true;
-      break;
-    }
-  }
-
-  // If not found, reset the index to 0
-  if (!found)
-    plotIndex = 0;
-
-  // Add plotting mode
-  auto plot = new QStandardItem();
-  plot->setEditable(true);
-  plot->setData(ComboBox, WidgetType);
-  plot->setData(m_plotOptions.values(), ComboBoxData);
-  plot->setData(plotIndex, EditableValue);
-  plot->setData(tr("Oscilloscope Plot"), ParameterName);
-  plot->setData(kDatasetView_Plot, ParameterType);
-  plot->setData(tr("Plot data in real-time"), ParameterDescription);
-  m_datasetModel->appendRow(plot);
-
-  // Add FFT checkbox
-  auto fft = new QStandardItem();
-  fft->setEditable(true);
-  fft->setData(CheckBox, WidgetType);
-  fft->setData(dataset.fft(), EditableValue);
-  fft->setData(tr("FFT Plot"), ParameterName);
-  fft->setData(kDatasetView_FFT, ParameterType);
-  fft->setData(0, PlaceholderValue);
-  fft->setData(tr("Plot frequency-domain data"), ParameterDescription);
-  m_datasetModel->appendRow(fft);
-
   // FFT-specific options
   if (showFFTOptions)
   {
@@ -2504,17 +2583,6 @@ void JSON::ProjectModel::buildDatasetModel(const JSON::Dataset &dataset)
     m_datasetModel->appendRow(fftSamplingRate);
   }
 
-  // Add LED panel checkbox
-  auto led = new QStandardItem();
-  led->setEditable(true);
-  led->setData(CheckBox, WidgetType);
-  led->setData(dataset.led(), EditableValue);
-  led->setData(tr("Show in LED Panel"), ParameterName);
-  led->setData(kDatasetView_LED, ParameterType);
-  led->setData(0, PlaceholderValue);
-  led->setData(tr("Quick status monitoring"), ParameterDescription);
-  m_datasetModel->appendRow(led);
-
   // Add LED High value
   if (showLedOptions)
   {
@@ -2982,6 +3050,9 @@ void JSON::ProjectModel::onDatasetItemChanged(QStandardItem *item)
       m_selectedDataset.m_log = plotOptions.at(value.toInt()).second;
       buildDatasetModel(m_selectedDataset);
       break;
+    case kDatasetView_xAxis:
+      m_selectedDataset.m_xAxisId = value.toInt();
+      break;
     case kDatasetView_Min:
       m_selectedDataset.m_min = value.toFloat();
       break;

app/src/JSON/ProjectModel.h

@@ -224,6 +224,8 @@ public:
   [[nodiscard]] QString selectedText() const;
   [[nodiscard]] QString selectedIcon() const;
 
+  [[nodiscard]] QStringList xDataSources() const;
+
   [[nodiscard]] const QString actionIcon() const;
   [[nodiscard]] const QStringList &availableActionIcons() const;
 

app/src/SerialStudio.h

@@ -29,16 +29,60 @@
 #include "JSON/Dataset.h"
 
 /**
- * @typedef Curve
+ * @typedef PlotDataX
- * @brief Defines a plot series or curve as a vector of real (qreal) values.
+ * @brief Represents the unique X-axis data points for a plot.
+ *
+ * The X-axis data points are stored as a set of unique `qreal` values.
+ * This ensures that each X value is distinct, which is essential for correct
+ * rendering of the plot. The set is inherently ordered in ascending order.
  */
-typedef QVector<qreal> Curve;
+typedef QVector<qreal> PlotDataX;
 
 /**
- * @typedef MultipleCurves
+ * @typedef PlotDataY
- * @brief Defines a collection of curves, used for representing multiple plots.
+ * @brief Represents the Y-axis data points for a single curve.
+ *
+ * The Y-axis data points are stored as a vector of `qreal` values.
+ * Unlike X-axis data, Y values can have duplicates and are directly
+ * mapped to the corresponding X values during plotting.
  */
-typedef QVector<Curve> MultipleCurves;
+typedef QVector<qreal> PlotDataY;
+
+/**
+ * @typedef MultiPlotDataY
+ * @brief Represents Y-axis data for multiple curves in a multiplot.
+ *
+ * A vector of `PlotDataY` structures, where each element represents
+ * the Y-axis data for one curve in a multiplot widget. This allows
+ * managing multiple curves independently.
+ */
+typedef QVector<PlotDataY> MultiPlotDataY;
+
+/**
+ * @typedef LineSeries
+ * @brief Represents a paired series of X-axis and Y-axis data for a plot.
+ *
+ * The `LineSeries` type is defined as a `QPair` containing:
+ * - A pointer to `PlotDataX`, which holds the unique X-axis values.
+ * - A pointer to `PlotDataY`, which holds the Y-axis values.
+ *
+ * This type simplifies data processing by tightly coupling the related X and Y
+ * data for a plot, ensuring that they are always accessed and managed together.
+ */
+typedef struct
+{
+  PlotDataX *x;
+  PlotDataY *y;
+} LineSeries;
+
+/**
+ * @typedef MultiLineSeries
+ */
+typedef struct
+{
+  PlotDataX *x;
+  QList<PlotDataY> y;
+} MultiLineSeries;
 
 /**
  * @class SerialStudio

app/src/UI/Dashboard.cpp

@@ -448,6 +448,22 @@ QStringList UI::Dashboard::actionTitles() const
   return titles;
 }
 
+/**
+ * @brief Provides access to the map of dataset objects.
+ *
+ * This function returns a constant reference to the map that associates dataset
+ * indexes with their corresponding `JSON::Dataset` objects.
+ *
+ * @return A constant reference to the `QMap` mapping dataset indexes (`int`)
+ *         to their respective `JSON::Dataset` objects.
+ *
+ * @note The map can be used to retrieve datasets by their index.
+ */
+const QMap<int, JSON::Dataset> &UI::Dashboard::datasets() const
+{
+  return m_datasets;
+}
+
 /**
  * @brief Provides access to a specific group widget based on widget type and
  *        relative index.
@@ -493,48 +509,52 @@ const JSON::Frame &UI::Dashboard::currentFrame()
 
 /**
  * @brief Provides the FFT plot values currently displayed on the dashboard.
- * @return A reference to a QVector containing the FFT Curve data.
+ * @return A reference to a QVector containing the FFT PlotDataY data.
  */
-const QVector<Curve> &UI::Dashboard::fftPlotValues()
+const PlotDataY &UI::Dashboard::fftData(const int index) const
 {
-  return m_fftPlotValues;
+  return m_fftValues[index];
 }
 
 /**
  * @brief Provides the linear plot values currently displayed on the dashboard.
- * @return A reference to a QVector containing the linear Curve data.
+ * @return A reference to a QVector containing the linear PlotDataY data.
  */
-const QVector<Curve> &UI::Dashboard::linearPlotValues()
+const LineSeries &UI::Dashboard::plotData(const int index) const
 {
-  return m_linearPlotValues;
+  return m_pltValues[index];
 }
 
 /**
  * @brief Provides the values for multiplot visuals on the dashboard.
- * @return A reference to a QVector containing MultipleCurves data.
+ * @return A reference to a QVector containing MultiPlotDataY data.
  */
-const QVector<MultipleCurves> &UI::Dashboard::multiplotValues()
+const MultiLineSeries &UI::Dashboard::multiplotData(const int index) const
 {
-  return m_multiplotValues;
+  return m_multipltValues[index];
 }
 
 /**
- * @brief Sets the number of data points displayed in the dashboard plots.
+ * @brief Sets the number of data points for the dashboard plots.
- *        Clears existing multiplot and linear plot values and emits the
- *        @c pointsChanged signal.
  *
- * @param points The new point/sample count.
+ * This function updates the total number of points (samples) used in the plots
+ * and reconfigures the data structures for linear and multi-line series to
+ * reflect the new point count.
+ *
+ * @param points The new number of data points (samples).
  */
 void UI::Dashboard::setPoints(const int points)
 {
   if (m_points != points)
   {
+    // Update number of points
     m_points = points;
-    m_multiplotValues.clear();
-    m_linearPlotValues.clear();
-    m_multiplotValues.squeeze();
-    m_linearPlotValues.squeeze();
 
+    // Update plot data structures
+    configureLineSeries();
+    configureMultiLineSeries();
+
+    // Update the UI
     Q_EMIT pointsChanged();
   }
 }
@@ -592,12 +612,18 @@ void UI::Dashboard::setShowLegends(const bool enabled)
 void UI::Dashboard::resetData(const bool notify)
 {
   // Clear plotting data
-  m_fftPlotValues.clear();
+  m_fftValues.clear();
-  m_multiplotValues.clear();
+  m_pltValues.clear();
-  m_linearPlotValues.clear();
+  m_multipltValues.clear();
-  m_fftPlotValues.squeeze();
+
-  m_multiplotValues.squeeze();
+  // Free memory associated with the containers of the plotting data
-  m_linearPlotValues.squeeze();
+  m_fftValues.squeeze();
+  m_pltValues.squeeze();
+  m_multipltValues.squeeze();
+
+  // Clear X/Y axis arrays
+  m_xAxisData.clear();
+  m_yAxisData.clear();
 
   // Clear widget & action structures
   m_widgetCount = 0;
@@ -662,81 +688,62 @@ void UI::Dashboard::setWidgetVisible(const SerialStudio::DashboardWidget widget,
 }
 
 /**
- * @brief Updates plot data for linear, FFT, and multiplot widgets on the
+ * @brief Updates the plot data for all dashboard widgets.
- *        dashboard.
  *
- * This function checks and initializes the data structures for each plot type
+ * This function ensures that the data structures for FFT plots, linear plots,
- * (linear plots, FFT plots, and multiplots) if needed.
+ * and multiplots are correctly initialized and updated with the latest values
+ * from the datasets. It handles reinitialization if the widget count changes
+ * and shifts data to accommodate new samples.
  *
- * It then appends the latest values from the data sources to these plots by
+ * @note This function is typically called in real-time to keep plots
- * shifting older data back and adding new data to the end.
+ *       synchronized with incoming data.
  */
 void UI::Dashboard::updatePlots()
 {
-  // Check if we need to re-initialize linear plots data
-  if (m_linearPlotValues.count() != widgetCount(SerialStudio::DashboardPlot))
-  {
-    m_linearPlotValues.clear();
-    m_linearPlotValues.squeeze();
-    for (int i = 0; i < widgetCount(SerialStudio::DashboardPlot); ++i)
-    {
-      m_linearPlotValues.append(Curve());
-      m_linearPlotValues.last().resize(points() + 1);
-      SIMD::fill<qreal>(m_linearPlotValues.last().data(), points() + 1, 0);
-    }
-  }
-
   // Check if we need to re-initialize FFT plots data
-  if (m_fftPlotValues.count() != widgetCount(SerialStudio::DashboardFFT))
+  if (m_fftValues.count() != widgetCount(SerialStudio::DashboardFFT))
-  {
+    configureFftSeries();
-    m_fftPlotValues.clear();
+
-    m_fftPlotValues.squeeze();
+  // Check if we need to re-initialize linear plots data
-    for (int i = 0; i < widgetCount(SerialStudio::DashboardFFT); ++i)
+  if (m_pltValues.count() != widgetCount(SerialStudio::DashboardPlot))
-    {
+    configureLineSeries();
-      const auto &dataset = getDatasetWidget(SerialStudio::DashboardFFT, i);
-      m_fftPlotValues.append(Curve());
-      m_fftPlotValues.last().resize(dataset.fftSamples());
-      SIMD::fill<qreal>(m_fftPlotValues.last().data(), dataset.fftSamples(), 0);
-    }
-  }
 
   // Check if we need to re-initialize multiplot data
-  if (m_multiplotValues.count()
+  if (m_multipltValues.count() != widgetCount(SerialStudio::DashboardMultiPlot))
-      != widgetCount(SerialStudio::DashboardMultiPlot))
+    configureMultiLineSeries();
-  {
-    m_multiplotValues.clear();
-    m_multiplotValues.squeeze();
-    for (int i = 0; i < widgetCount(SerialStudio::DashboardMultiPlot); ++i)
-    {
-      const auto &group = getGroupWidget(SerialStudio::DashboardMultiPlot, i);
-      m_multiplotValues.append(MultipleCurves());
-      m_multiplotValues.last().resize(group.datasetCount());
-      for (int j = 0; j < group.datasetCount(); ++j)
-      {
-        m_multiplotValues[i][j].resize(points() + 1);
-        SIMD::fill<qreal>(m_multiplotValues[i][j].data(), points() + 1, 0);
-      }
-    }
-  }
-
-  // Append latest values to linear plots data
-  for (int i = 0; i < widgetCount(SerialStudio::DashboardPlot); ++i)
-  {
-    const auto &dataset = getDatasetWidget(SerialStudio::DashboardPlot, i);
-    auto *data = m_linearPlotValues[i].data();
-    auto count = m_linearPlotValues[i].count();
-    SIMD::shift<qreal>(data, count, dataset.value().toFloat());
-  }
 
   // Append latest values to FFT plots data
   for (int i = 0; i < widgetCount(SerialStudio::DashboardFFT); ++i)
   {
     const auto &dataset = getDatasetWidget(SerialStudio::DashboardFFT, i);
-    auto *data = m_fftPlotValues[i].data();
+    auto *data = m_fftValues[i].data();
-    auto count = m_fftPlotValues[i].count();
+    auto count = m_fftValues[i].count();
     SIMD::shift<qreal>(data, count, dataset.value().toFloat());
   }
 
+  // Append latest values to linear plots data
+  for (int i = 0; i < widgetCount(SerialStudio::DashboardPlot); ++i)
+  {
+    const auto &yDataset = getDatasetWidget(SerialStudio::DashboardPlot, i);
+    if (m_datasets.contains(yDataset.xAxisId()))
+    {
+      const auto &xDataset = m_datasets[yDataset.xAxisId()];
+      auto *xData = m_xAxisData[xDataset.index()].data();
+      auto *yData = m_yAxisData[yDataset.index()].data();
+      auto xCount = m_xAxisData[xDataset.index()].count();
+      auto yCount = m_yAxisData[yDataset.index()].count();
+      SIMD::shift<qreal>(xData, xCount, xDataset.value().toFloat());
+      SIMD::shift<qreal>(yData, yCount, yDataset.value().toFloat());
+    }
+
+    else
+    {
+      auto *data = m_yAxisData[yDataset.index()].data();
+      auto count = m_yAxisData[yDataset.index()].count();
+      SIMD::shift<qreal>(data, count, yDataset.value().toFloat());
+    }
+  }
+
   // Append latest values to multiplots data
   for (int i = 0; i < widgetCount(SerialStudio::DashboardMultiPlot); ++i)
   {
@@ -744,13 +751,164 @@ void UI::Dashboard::updatePlots()
     for (int j = 0; j < group.datasetCount(); ++j)
     {
       const auto &dataset = group.datasets()[j];
-      auto *data = m_multiplotValues[i][j].data();
+      auto *data = m_multipltValues[i].y[j].data();
-      auto count = m_multiplotValues[i][j].count();
+      auto count = m_multipltValues[i].y[j].count();
       SIMD::shift<qreal>(data, count, dataset.value().toFloat());
     }
   }
 }
 
+/**
+ * @brief Configures the FFT series data structure for the dashboard.
+ *
+ * This function clears existing FFT values and initializes the data structure
+ * for each FFT plot widget with a predefined number of samples, filling it with
+ * zeros.
+ *
+ * @note Typically called during dashboard setup or reset to prepare FFT plot
+ *       widgets for rendering.
+ */
+void UI::Dashboard::configureFftSeries()
+{
+  // Clear memory
+  m_fftValues.clear();
+  m_fftValues.squeeze();
+
+  // Construct FFT plot data structure
+  for (int i = 0; i < widgetCount(SerialStudio::DashboardFFT); ++i)
+  {
+    const auto &dataset = getDatasetWidget(SerialStudio::DashboardFFT, i);
+    m_fftValues.append(PlotDataY());
+    m_fftValues.last().resize(dataset.fftSamples());
+    SIMD::fill<qreal>(m_fftValues.last().data(), dataset.fftSamples(), 0);
+  }
+}
+
+/**
+ * @brief Configures the line series data structure for the dashboard.
+ *
+ * This function clears and reinitializes the X-axis and Y-axis data arrays,
+ * as well as the plot values structure (`m_pltValues`). It associates each
+ * dataset with its respective X and Y data, creating `LineSeries` objects
+ * for plotting.
+ *
+ * - If a dataset specifies an X-axis source, the corresponding data is used.
+ * - Otherwise, the default X-axis (based on sample points) is used.
+ *
+ * @note Typically called during dashboard setup or reset to prepare plot
+ *       widgets for rendering.
+ */
+void UI::Dashboard::configureLineSeries()
+{
+  // Clear memory
+  m_xAxisData.clear();
+  m_yAxisData.clear();
+  m_pltValues.clear();
+  m_pltValues.squeeze();
+
+  // Reset default X-axis data
+  m_defaultXAxis.clear();
+  m_defaultXAxis.squeeze();
+  m_defaultXAxis.reserve(points() + 1);
+  for (int i = 0; i < points() + 1; ++i)
+    m_defaultXAxis.append(i);
+
+  // Construct X/Y axis data arrays
+  for (auto i = m_widgetDatasets.begin(); i != m_widgetDatasets.end(); ++i)
+  {
+    // Obtain list of datasets for a widget type
+    const auto &datasets = i.value();
+
+    // Iterate over all the datasets
+    for (auto d = datasets.begin(); d != datasets.end(); ++d)
+    {
+      if (d->graph())
+      {
+        // Register X-axis
+        PlotDataY yAxis;
+        m_yAxisData.insert(d->index(), yAxis);
+
+        // Register X-axis
+        int xSource = d->xAxisId();
+        if (!m_xAxisData.contains(xSource))
+        {
+          PlotDataX xAxis;
+          if (m_datasets.contains(xSource))
+            m_xAxisData.insert(xSource, xAxis);
+        }
+      }
+    }
+  }
+
+  // Construct plot values structure
+  for (int i = 0; i < widgetCount(SerialStudio::DashboardPlot); ++i)
+  {
+    // Obtain Y-axis data
+    const auto &yDataset = getDatasetWidget(SerialStudio::DashboardPlot, i);
+
+    // Add X-axis data & generate a line series with X/Y data
+    if (m_datasets.contains(yDataset.xAxisId()))
+    {
+      const auto &xDataset = m_datasets[yDataset.xAxisId()];
+      m_xAxisData[xDataset.index()].resize(points() + 1);
+      m_yAxisData[yDataset.index()].resize(points() + 1);
+      SIMD::fill<qreal>(m_xAxisData[xDataset.index()].data(), points() + 1, 0);
+      SIMD::fill<qreal>(m_yAxisData[yDataset.index()].data(), points() + 1, 0);
+
+      LineSeries series;
+      series.x = &m_xAxisData[xDataset.index()];
+      series.y = &m_yAxisData[yDataset.index()];
+      m_pltValues.append(series);
+    }
+
+    // Only use Y-axis data, use samples/points as X-axis
+    else
+    {
+      m_yAxisData[yDataset.index()].resize(points() + 1);
+      SIMD::fill<qreal>(m_yAxisData[yDataset.index()].data(), points() + 1, 0);
+
+      LineSeries series;
+      series.x = &m_defaultXAxis;
+      series.y = &m_yAxisData[yDataset.index()];
+      m_pltValues.append(series);
+    }
+  }
+}
+
+/**
+ * @brief Configures the multi-line series data structure for the dashboard.
+ *
+ * This function initializes the data structure used for multi-plot widgets.
+ * It assigns the default X-axis to all multi-line series and creates a
+ * `PlotDataY` vector for each dataset in the group, initializing it with zeros.
+ *
+ * @note Typically called during dashboard setup or reset to prepare multi-plot
+ *       widgets for rendering.
+ */
+void UI::Dashboard::configureMultiLineSeries()
+{
+  // Clear data
+  m_multipltValues.clear();
+  m_multipltValues.squeeze();
+
+  // Construct multi-plot values structure
+  for (int i = 0; i < widgetCount(SerialStudio::DashboardMultiPlot); ++i)
+  {
+    const auto &group = getGroupWidget(SerialStudio::DashboardMultiPlot, i);
+
+    MultiLineSeries series;
+    series.x = &m_defaultXAxis;
+    for (int j = 0; j < group.datasetCount(); ++j)
+    {
+      series.y.append(PlotDataY());
+      series.y.last().resize(points() + 1);
+      SIMD::fill<qreal>(series.y.last().data(), points() + 1, 0);
+    }
+
+    m_multipltValues.append(series);
+  }
+}
+
 /**
  * @brief Processes and updates the dashboard data based on a new frame.
  *
@@ -803,6 +961,7 @@ void UI::Dashboard::processFrame(const JSON::Frame &frame)
     Q_EMIT actionCountChanged();
 
   // Update widget data structures
+  m_datasets.clear();
   JSON::Group ledPanel;
   for (const auto &group : frame.groups())
   {
@@ -816,6 +975,7 @@ void UI::Dashboard::processFrame(const JSON::Frame &frame)
 
     for (const auto &dataset : group.datasets())
     {
+      m_datasets.insert(dataset.index(), dataset);
       auto keys = SerialStudio::getDashboardWidgets(dataset);
       for (const auto &key : keys)
       {
@@ -904,6 +1064,11 @@ void UI::Dashboard::processFrame(const JSON::Frame &frame)
       }
     }
 
+    // Clear plot data setup
+    m_fftValues.clear();
+    m_pltValues.clear();
+    m_multipltValues.clear();
+
     // Update user interface
     Q_EMIT widgetCountChanged();
     Q_EMIT widgetVisibilityChanged();

app/src/UI/Dashboard.h

@@ -134,14 +134,16 @@ public:
   [[nodiscard]] QStringList actionTitles() const;
 
   // clang-format off
+  [[nodiscard]] const QMap<int, JSON::Dataset> &datasets() const;
   [[nodiscard]] const JSON::Group &getGroupWidget(const SerialStudio::DashboardWidget widget, const int index) const;
   [[nodiscard]] const JSON::Dataset &getDatasetWidget(const SerialStudio::DashboardWidget widget, const int index) const;
   // clang-format on
 
   [[nodiscard]] const JSON::Frame &currentFrame();
-  [[nodiscard]] const QVector<Curve> &fftPlotValues();
+
-  [[nodiscard]] const QVector<Curve> &linearPlotValues();
+  [[nodiscard]] const PlotDataY &fftData(const int index) const;
-  [[nodiscard]] const QVector<MultipleCurves> &multiplotValues();
+  [[nodiscard]] const LineSeries &plotData(const int index) const;
+  [[nodiscard]] const MultiLineSeries &multiplotData(const int index) const;
 
 public slots:
   void setPoints(const int points);
@@ -155,6 +157,9 @@ public slots:
 
 private slots:
   void updatePlots();
+  void configureFftSeries();
+  void configureLineSeries();
+  void configureMultiLineSeries();
   void processFrame(const JSON::Frame &frame);
 
 private:
@@ -165,11 +170,16 @@ private:
   bool m_updateRequired;
   SerialStudio::AxisVisibility m_axisVisibility;
 
-  QVector<Curve> m_fftPlotValues;
+  PlotDataX m_defaultXAxis;
-  QVector<Curve> m_linearPlotValues;
+  QMap<int, PlotDataX> m_xAxisData;
-  QVector<MultipleCurves> m_multiplotValues;
+  QMap<int, PlotDataY> m_yAxisData;
+
+  QVector<PlotDataY> m_fftValues;
+  QVector<LineSeries> m_pltValues;
+  QVector<MultiLineSeries> m_multipltValues;
 
   QVector<JSON::Action> m_actions;
+  QMap<int, JSON::Dataset> m_datasets;
   QList<SerialStudio::DashboardWidget> m_availableWidgets;
   QMap<int, QPair<SerialStudio::DashboardWidget, int>> m_widgetMap;
   QMap<SerialStudio::DashboardWidget, QVector<bool>> m_widgetVisibility;

app/src/UI/Widgets/FFTPlot.cpp

@@ -146,15 +146,12 @@ void Widgets::FFTPlot::updateData()
   if (!isEnabled())
     return;
 
-  // Get the plot data
+  if (VALIDATE_WIDGET(SerialStudio::DashboardFFT, m_index))
-  auto dash = &UI::Dashboard::instance();
-  auto plotData = dash->fftPlotValues();
-
-  // If the plot data is valid, update the data
-  if (plotData.count() > m_index)
   {
+    // Get the plot data
+    const auto &data = UI::Dashboard::instance().fftData(m_index);
+
     // Obtain samples from data
-    const auto &data = plotData.at(m_index);
     for (int i = 0; i < m_size; ++i)
       m_samples[i] = static_cast<float>(data[i]);
 

app/src/UI/Widgets/MultiPlot.cpp

@@ -194,19 +194,15 @@ void Widgets::MultiPlot::updateData()
 
   if (VALIDATE_WIDGET(SerialStudio::DashboardMultiPlot, m_index))
   {
-    const auto &plotData = UI::Dashboard::instance().multiplotValues();
+    const auto &data = UI::Dashboard::instance().multiplotData(m_index);
-    if (m_index >= 0 && plotData.count() > m_index)
+    for (int i = 0; i < data.y.count(); ++i)
     {
-      const auto &curves = plotData[m_index];
+      const auto &series = data.y[i];
-      for (int i = 0; i < curves.count(); ++i)
+      if (m_data[i].count() != series.count())
-      {
+        m_data[i].resize(series.count());
-        const auto &values = curves[i];
-        if (m_data[i].count() != values.count())
-          m_data[i].resize(values.count());
 
-        for (int j = 0; j < values.count(); ++j)
+      for (int j = 0; j < series.count(); ++j)
-          m_data[i][j] = QPointF(j, values[j]);
+        m_data[i][j] = QPointF(data.x->at(j), series[j]);
-      }
     }
   }
 }

app/src/UI/Widgets/Plot.cpp

@@ -39,14 +39,26 @@ Widgets::Plot::Plot(const int index, QQuickItem *parent)
 {
   if (VALIDATE_WIDGET(SerialStudio::DashboardPlot, m_index))
   {
-    const auto &dataset = GET_DATASET(SerialStudio::DashboardPlot, m_index);
+    const auto &yDataset = GET_DATASET(SerialStudio::DashboardPlot, m_index);
 
-    m_yLabel = dataset.title();
+    m_minY = qMin(yDataset.min(), yDataset.max());
-    m_minY = qMin(dataset.min(), dataset.max());
+    m_maxY = qMax(yDataset.min(), yDataset.max());
-    m_maxY = qMax(dataset.min(), dataset.max());
 
-    if (!dataset.units().isEmpty())
+    const auto xAxisId = yDataset.xAxisId();
-      m_yLabel += " (" + dataset.units() + ")";
+    if (UI::Dashboard::instance().datasets().contains(xAxisId))
+    {
+      const auto &xDataset = UI::Dashboard::instance().datasets()[xAxisId];
+      m_xLabel = xDataset.title();
+      if (!xDataset.units().isEmpty())
+        m_xLabel += " (" + xDataset.units() + ")";
+    }
+
+    else
+      m_xLabel = tr("Samples");
+
+    m_yLabel = yDataset.title();
+    if (!yDataset.units().isEmpty())
+      m_yLabel += " (" + yDataset.units() + ")";
 
     connect(&UI::Dashboard::instance(), &UI::Dashboard::updated, this,
             &Plot::updateData);
@@ -121,6 +133,15 @@ const QString &Widgets::Plot::yLabel() const
   return m_yLabel;
 }
 
+/**
+ * @brief Returns the X-axis label.
+ * @return The X-axis label.
+ */
+const QString &Widgets::Plot::xLabel() const
+{
+  return m_xLabel;
+}
+
 /**
  * @brief Draws the data on the given QLineSeries.
  * @param series The QLineSeries to draw the data on.
@@ -145,16 +166,27 @@ void Widgets::Plot::updateData()
 
   if (VALIDATE_WIDGET(SerialStudio::DashboardPlot, m_index))
   {
-    const auto &plotData = UI::Dashboard::instance().linearPlotValues();
+    // Get plotting data
+    const auto &plotData = UI::Dashboard::instance().plotData(m_index);
+    const auto X = plotData.x;
+    const auto Y = plotData.y;
 
-    if (m_index >= 0 && plotData.count() > m_index)
+    // Resize series array if required
+    if (m_data.count() != X->count())
+      m_data.resize(X->count());
+
+    // Convert data to a list of points
+    int i = 0;
+    for (auto x = X->begin(); x != X->end(); ++x)
     {
-      const auto &values = plotData[m_index];
+      if (Y->count() > i)
-      if (m_data.count() != values.count())
+      {
-        m_data.resize(UI::Dashboard::instance().points());
+        m_data[i] = QPointF(*x, Y->at(i));
+        ++i;
+      }
 
-      for (int i = 0; i < values.count(); ++i)
+      else
-        m_data[i] = QPointF(i, values[i]);
+        break;
     }
   }
 }
@@ -164,45 +196,137 @@ void Widgets::Plot::updateData()
  */
 void Widgets::Plot::updateRange()
 {
-  // Reserve the number of points in the dashboard
+  // Clear memory
   m_data.clear();
   m_data.squeeze();
   m_data.resize(UI::Dashboard::instance().points() + 1);
 
-  // Update x-axis
+  // Obtain dataset information
+  if (VALIDATE_WIDGET(SerialStudio::DashboardPlot, m_index))
+  {
+    const auto &yD = GET_DATASET(SerialStudio::DashboardPlot, m_index);
+    if (yD.xAxisId() > 0)
+    {
+      const auto &xD = UI::Dashboard::instance().datasets()[yD.xAxisId()];
+      m_minX = xD.min();
+      m_maxX = xD.max();
+    }
+
+    else
+    {
       m_minX = 0;
       m_maxX = UI::Dashboard::instance().points();
+    }
+  }
 
   // Update the plot
   Q_EMIT rangeChanged();
 }
 
 /**
- * @brief Calculates the auto-scale range for the Y-axis.
+ * @brief Calculates the auto-scale range for both X and Y axes of the plot.
+ *
+ * This function determines the minimum and maximum values for the X and Y axes
+ * of the plot based on the associated dataset. If the X-axis data source is set
+ * to a specific dataset, its range is computed; otherwise, the range defaults
+ * to `[0, points]`. For the Y-axis, the range is always determined from the
+ * dataset values.
+ *
+ * @note The function emits the `rangeChanged()` signal if either the X or Y
+ *       range is updated.
  */
 void Widgets::Plot::calculateAutoScaleRange()
+{
+  // Validate that the dataset exists
+  if (!VALIDATE_WIDGET(SerialStudio::DashboardPlot, m_index))
+    return;
+
+  // Initialize parameters
+  bool xChanged = false;
+  bool yChanged = false;
+
+  // Obtain scale range for Y-axis
+  // clang-format off
+  const auto &yDataset = GET_DATASET(SerialStudio::DashboardPlot, m_index);
+  yChanged = computeMinMaxValues(m_minY, m_maxY, yDataset, true, [](const QPointF &p) { return p.y(); });
+  // clang-format on
+
+  // Obtain range scale for X-axis
+  // clang-format off
+  if (UI::Dashboard::instance().datasets().contains(yDataset.xAxisId()))
+  {
+    const auto &xDataset = UI::Dashboard::instance().datasets()[yDataset.xAxisId()];
+    xChanged = computeMinMaxValues(m_minX, m_maxX, xDataset, false, [](const QPointF &p) { return p.x(); });
+  }
+  // clang-format on
+
+  // X-axis data source set to samples, use [0, points] as range
+  else
+  {
+    const auto points = UI::Dashboard::instance().points();
+
+    if (m_minX != 0 || m_maxX != points)
+    {
+      m_minX = 0;
+      m_maxX = points;
+      xChanged = true;
+    }
+  }
+
+  // Update user interface
+  if (xChanged || yChanged)
+    Q_EMIT rangeChanged();
+}
+
+/**
+ * @brief Computes the minimum and maximum values for a given axis of the plot.
+ *
+ * This templated function calculates the minimum and maximum values for a plot
+ * axis (either X or Y) using the provided dataset and an extractor function. If
+ * the dataset has no valid range or is empty, a fallback range `[0, 1]` or an
+ * adjusted range is applied.
+ *
+ * @tparam Extractor A callable object (e.g., lambda) used to extract values
+ *                   from data points.
+ *
+ * @param min Reference to the variable storing the minimum value.
+ * @param max Reference to the variable storing the maximum value.
+ * @param dataset The dataset to compute the range from.
+ * @param extractor A function used to extract axis-specific values (e.g.,
+ *                  `p.y()` or `p.x()`).
+ *
+ * @return `true` if the computed range differs from the previous range, `false`
+ * otherwise.
+ *
+ * @note If the dataset has the same minimum and maximum values, the range is
+ * adjusted to provide a better display.
+ */
+template<typename Extractor>
+bool Widgets::Plot::computeMinMaxValues(qreal &min, qreal &max,
+                                        const JSON::Dataset &dataset,
+                                        const bool addPadding,
+                                        Extractor extractor)
 {
   // Store previous values
   bool ok = true;
-  const auto prevMinY = m_minY;
+  const auto prevMinY = min;
-  const auto prevMaxY = m_maxY;
+  const auto prevMaxY = max;
 
   // If the data is empty, set the range to 0-1
   if (m_data.isEmpty())
   {
-    m_minY = 0;
+    min = 0;
-    m_maxY = 1;
+    max = 1;
   }
 
   // Obtain min/max values from datasets
-  else if (VALIDATE_WIDGET(SerialStudio::DashboardPlot, m_index))
+  else
   {
-    const auto &dataset = GET_DATASET(SerialStudio::DashboardPlot, m_index);
     ok &= !qFuzzyCompare(dataset.min(), dataset.max());
     if (ok)
     {
-      m_minY = qMin(dataset.min(), dataset.max());
+      min = qMin(dataset.min(), dataset.max());
-      m_maxY = qMax(dataset.min(), dataset.max());
+      max = qMax(dataset.min(), dataset.max());
     }
   }
 
@@ -210,49 +334,52 @@ void Widgets::Plot::calculateAutoScaleRange()
   if (!ok)
   {
     // Initialize values to ensure that min/max are set
-    m_minY = std::numeric_limits<qreal>::max();
+    min = std::numeric_limits<qreal>::max();
-    m_maxY = std::numeric_limits<qreal>::lowest();
+    max = std::numeric_limits<qreal>::lowest();
 
     // Loop through the plot data and update the min and max
-    m_minY = SIMD::findMin(m_data, [](const QPointF &p) { return p.y(); });
+    min = SIMD::findMin(m_data, extractor);
-    m_maxY = SIMD::findMax(m_data, [](const QPointF &p) { return p.y(); });
+    max = SIMD::findMax(m_data, extractor);
 
     // If min and max are the same, adjust the range
-    if (qFuzzyCompare(m_minY, m_maxY))
+    if (qFuzzyCompare(min, max))
     {
-      if (qFuzzyIsNull(m_minY))
+      if (qFuzzyIsNull(min))
       {
-        m_minY = -1;
+        min = -1;
-        m_maxY = 1;
+        max = 1;
       }
 
       else
       {
-        double absValue = qAbs(m_minY);
+        double absValue = qAbs(min);
-        m_minY = m_minY - absValue * 0.1;
+        min = min - absValue * 0.1;
-        m_maxY = m_maxY + absValue * 0.1;
+        min = max + absValue * 0.1;
       }
     }
 
     // If the min and max are not the same, set the range to 10% more
-    else
+    else if (addPadding)
     {
-      double range = m_maxY - m_minY;
+      double range = max - min;
-      m_minY -= range * 0.1;
+      min -= range * 0.1;
-      m_maxY += range * 0.1;
+      max += range * 0.1;
     }
 
     // Round to integer numbers
-    m_maxY = std::ceil(m_maxY);
+    max = std::ceil(max);
-    m_minY = std::floor(m_minY);
+    min = std::floor(min);
-    if (qFuzzyCompare(m_maxY, m_minY))
+    if (qFuzzyCompare(max, min) && addPadding)
     {
-      m_minY -= 1;
+      min -= 1;
-      m_maxY += 1;
+      max += 1;
     }
   }
 
   // Update user interface if required
-  if (qFuzzyCompare(prevMinY, m_minY) || qFuzzyCompare(prevMaxY, m_maxY))
+  if (qFuzzyCompare(prevMinY, min) || qFuzzyCompare(prevMaxY, max))
-    Q_EMIT rangeChanged();
+    return true;
+
+  // Data not changed
+  return false;
 }

app/src/UI/Widgets/Plot.h

@@ -26,6 +26,8 @@
 #include <QVector>
 #include <QLineSeries>
 
+#include "JSON/Dataset.h"
+
 namespace Widgets
 {
 /**
@@ -35,6 +37,7 @@ class Plot : public QQuickItem
 {
   Q_OBJECT
   Q_PROPERTY(QString yLabel READ yLabel CONSTANT)
+  Q_PROPERTY(QString xLabel READ xLabel CONSTANT)
   Q_PROPERTY(qreal minX READ minX NOTIFY rangeChanged)
   Q_PROPERTY(qreal maxX READ maxX NOTIFY rangeChanged)
   Q_PROPERTY(qreal minY READ minY NOTIFY rangeChanged)
@@ -60,6 +63,7 @@ public:
   [[nodiscard]] qreal xTickInterval() const;
   [[nodiscard]] qreal yTickInterval() const;
   [[nodiscard]] const QString &yLabel() const;
+  [[nodiscard]] const QString &xLabel() const;
 
 public slots:
   void draw(QLineSeries *series);
@@ -69,6 +73,11 @@ private slots:
   void updateRange();
   void calculateAutoScaleRange();
 
+private:
+  template<typename Extractor>
+  bool computeMinMaxValues(qreal &min, qreal &max, const JSON::Dataset &dataset,
+                           const bool addPadding, Extractor extractor);
+
 private:
   int m_index;
   qreal m_minX;
@@ -76,6 +85,7 @@ private:
   qreal m_minY;
   qreal m_maxY;
   QString m_yLabel;
+  QString m_xLabel;
   QVector<QPointF> m_data;
 };
 } // namespace Widgets