Slightly refactored drawCurve (into plot) to facilitate next steps

src/pulsatingscience.cpp

@@ -59,7 +59,7 @@ PulsatingScience::PulsatingScience(QWidget *parent) : QMainWindow(parent)
 
     // establish object communications
     connect(ui.pulsarGlWidget, SIGNAL(pulseProfileUpdated(const QVector<double>&)),
-            ui.pulseScopeWidget, SLOT(drawCurve(const QVector<double>&)), Qt::DirectConnection);
+            ui.pulseScopeWidget, SLOT(plot(const QVector<double>&)), Qt::DirectConnection);
 
     connect(m_hiddenShortcut, SIGNAL(activated()),
             this, SLOT(toggleHiddenDemoMode()));

src/pulsescopewidget.cpp

@@ -59,7 +59,7 @@ PulseScopeWidget::PulseScopeWidget(QWidget *parent) : QGraphicsView(parent),
     setScene(&m_scene);
 
     m_data.fill(0.0, qRound(m_scopeSizeH));
-    drawCurve(m_data);
+    drawCurve(m_path, m_data, "black");
 }
 
 PulseScopeWidget::~PulseScopeWidget()
@@ -74,18 +74,22 @@ void PulseScopeWidget::resizeEvent(QResizeEvent *event)
     fitInView(m_scene.itemsBoundingRect(), Qt::IgnoreAspectRatio);
 }
 
-void PulseScopeWidget::drawCurve(const QVector<double>& vector)
+void PulseScopeWidget::plot(const QVector<double>& vector)
 {
-    m_data = vector;
+    drawCurve(m_path, vector, "yellow");
+}
 
-    QPainterPath pulsePath(QPointF(0.0, m_scopeSizeV - m_data.at(0) - 1.0));
+void PulseScopeWidget::drawCurve(QGraphicsPathItem* path, const QVector<double>& vector, QString color)
+{
+    QPainterPath pulsePath(QPointF(0.0, m_scopeSizeV - vector.at(0) - 1.0));
     for(int i = 1; i < m_scopeSizeH; ++i) {
-        pulsePath.lineTo(i, m_scopeSizeV - m_data.at(i) - 1.0);
+        pulsePath.lineTo(i, m_scopeSizeV - vector.at(i) - 1.0);
     }
-    if(m_path == NULL) {
-        m_path = m_scene.addPath(pulsePath, QPen(Qt::yellow));
+    if(path == NULL) {
+        path = m_scene.addPath(pulsePath, QPen(QColor(color)));
     }
     else {
-        m_path->setPath(pulsePath);
+        path->setPen(QPen(QColor(color)));
+        path->setPath(pulsePath);
     }
 }

src/pulsescopewidget.h

@@ -42,9 +42,11 @@ public:
     void resizeEvent(QResizeEvent *event);
 
 public slots:
-    void drawCurve(const QVector<double>& vector);
+    void plot(const QVector<double>& vector);
 
 private:
+    void drawCurve(QGraphicsPathItem* path, const QVector<double>& vector, QString color);
+
     QGraphicsScene m_scene;
     QVector<double> m_data;
     QGraphicsPathItem *m_path;