Plot: dashed lines

lib/Core/Plot.cpp

@@ -356,6 +356,17 @@ void LineWidth::operator()(PlotOptions &option) const
     option.lineWidth = static_cast<int>(width_);
 }
 
+// Dash constructor ///////////////////////////////////////////////////////////
+Dash::Dash(const string &dash)
+: dash_(dash)
+{}
+
+// Dash modifier //////////////////////////////////////////////////////////////
+void Dash::operator()(PlotOptions &option) const
+{
+    option.dashType = dash_;
+}
+
 // LogScale constructor ////////////////////////////////////////////////////////
 LogScale::LogScale(const Axis axis)
 : axis_(axis)
@@ -470,6 +481,7 @@ void Plot::initOptions(void)
     options_.label[1]     = "";
     options_.lineColor    = "";
     options_.lineWidth    = -1;
+    options_.dashType     = "";
     options_.palette      = Palette::category10;
 }
 
@@ -505,6 +517,11 @@ Plot & Plot::operator<<(PlotObject &&command)
             commandStr         += " lw " + strFrom(options_.lineWidth);
             options_.lineWidth  = -1;
         }
+        if (!options_.dashType.empty())
+        {
+            commandStr        += " dt " + options_.dashType;
+            options_.dashType  = "";
+        }
         if (options_.title.empty())
         {
             commandStr += " notitle";

lib/Core/Plot.hpp

@@ -199,6 +199,7 @@ struct PlotOptions
     std::string              label[2];
     std::string              lineColor;
     int                      lineWidth;
+    std::string              dashType;
     std::vector<std::string> palette;
 };
 
@@ -264,6 +265,19 @@ private:
     const unsigned width_;
 };
 
+class Dash: public PlotModifier
+{
+public:
+    // constructor
+    explicit Dash(const std::string &dash);
+    // destructor
+    virtual ~Dash(void) = default;
+    // modifier
+    virtual void operator()(PlotOptions &option) const;
+private:
+    const std::string dash_;
+};
+
 class LogScale: public PlotModifier
 {
 public: