Working on second linechartplot time mode

src/ui/linechart/LinechartPlot.cc

@@ -56,6 +56,7 @@ maxInterval(MAX_STORAGE_INTERVAL),
 timeScaleStep(DEFAULT_SCALE_INTERVAL), // 10 seconds
 automaticScrollActive(false),
 m_active(true),
+m_groundTime(false),
 d_data(NULL),
 d_curve(NULL)
 {
@@ -232,7 +233,16 @@ void LinechartPlot::appendData(QString dataname, quint64 ms, double value)
     TimeSeriesData* dataset = data.value(dataname);
 
     // Append data
+    if (m_groundTime)
+    {
+        // Use the current (receive) time
+        dataset->append(MG::TIME::getGroundTimeNow(), value);
+    }
+    else
+    {
+        // Use timestamp from dataset
         dataset->append(ms, value);
+    }
 
     // Scaling values
     if(ms < minTime) minTime = ms;
@@ -253,6 +263,14 @@ void LinechartPlot::appendData(QString dataname, quint64 ms, double value)
     datalock.unlock();
 }
 
+/**
+ * @param enforce true to reset the data timestamp with the receive / ground timestamp
+ */
+void LinechartPlot::enforceGroundTime(bool enforce)
+{
+    m_groundTime = enforce;
+}
+
 void LinechartPlot::addCurve(QString id)
 {
     QColor currentColor = getNextColor();

src/ui/linechart/LinechartPlot.h

@@ -241,6 +241,9 @@ public slots:
     //void showCurve(QString id, int position);
     void setCurveColor(QString id, QColor color);
 
+    /** @brief Enforce the use of the receive timestamp */
+    void enforceGroundTime(bool enforce);
+
     // General interaction
     void setWindowPosition(quint64 end);
     void setPlotInterval(int interval);
@@ -292,6 +295,7 @@ protected:
     QTime lastMaxTimeAdded;
     int plotid;
     bool m_active; ///< Decides wether the plot is active or not
+    bool m_groundTime; ///< Enforce the use of the receive timestamp instead of the data timestamp
 
     // Methods
     void addCurve(QString id);

src/ui/linechart/LinechartWidget.cc

@@ -152,6 +152,14 @@ void LinechartWidget::createLayout()
     layout->setColumnStretch(3, 0);
     connect(logButton, SIGNAL(clicked()), this, SLOT(startLogging()));
 
+    // Ground time button
+    QToolButton* timeButton = new QToolButton(this);
+    timeButton->setText(tr("Ground Time"));
+    timeButton->setCheckable(true);
+    layout->addWidget(timeButton, 1, 4);
+    layout->setColumnStretch(4, 0);
+    connect(timeButton, SIGNAL(clicked(bool)), activePlot, SLOT(enforceGroundTime(bool)));
+
     // Create the scroll bar
     scrollbar = new QScrollBar(Qt::Horizontal, ui.diagramGroupBox);
     scrollbar->setMinimum(MIN_TIME_SCROLLBAR_VALUE);