add style support

src/common/gnuplot.cc

@@ -23,9 +23,15 @@
 namespace ns3 {
 
 GnuplotDataset::GnuplotDataset (std::string title)
-  : m_title (title)
+  : m_title (title),
+    m_style (LINES)
 {}
 void 
+GnuplotDataset::SetStyle (enum Style style)
+{
+  m_style = style;
+}
+void 
 GnuplotDataset::Add (double x, double y)
 {
   m_dataset.push_back (std::make_pair (x,y));
@@ -59,6 +65,32 @@ Gnuplot::GenerateOutput (std::ostream &os)
   for (Datasets::const_iterator i = m_datasets.begin (); i != m_datasets.end ();)
     {
       os << "'-' title '" << (*i)->m_title << "'";
+      switch ((*i)->m_style) {
+      case GnuplotDataset::LINES:
+	os << " with lines";
+	break;
+      case GnuplotDataset::POINTS:
+	os << " with points";
+	break;
+      case GnuplotDataset::LINES_POINTS:
+	os << " with linespoints";
+	break;
+      case GnuplotDataset::DOTS:
+	os << " with dots";
+	break;
+      case GnuplotDataset::IMPULSES:
+	os << " with impulses";
+	break;
+      case GnuplotDataset::STEPS:
+	os << " with steps";
+	break;
+      case GnuplotDataset::FSTEPS:
+	os << " with fsteps";
+	break;
+      case GnuplotDataset::HISTEPS:
+	os << " with histeps";
+	break;
+      }
       i++;
       if (i != m_datasets.end ())
 	{

src/common/gnuplot.h

@@ -29,13 +29,26 @@ namespace ns3 {
 class GnuplotDataset
 {
 public:
+  enum Style {
+    LINES,
+    POINTS,
+    LINES_POINTS,
+    DOTS,
+    IMPULSES,
+    STEPS,
+    FSTEPS,
+    HISTEPS,
+  };
+
   GnuplotDataset (std::string title);
+  void SetStyle (enum Style style);
   void Add (double x, double y);
 private:
   friend class Gnuplot;
   typedef std::vector<std::pair<double,double> > Dataset;
   Dataset m_dataset;
   std::string m_title;
+  enum Style m_style;
 };
 
 class Gnuplot