Refactor drawing of different styles of graph into classes

* grapher/GraphStyle.cxx: New file
* grapher/GraphStyle.hxx: New file
* grapher/Graph(draw): Move much drawing code to GraphStyle::draw

1 files changed, 43 insertions, 0 deletions

diff --git a/grapher/GraphStyle.hxx b/grapher/GraphStyle.hxx
new file mode 100644
index 00000000..4a0cd955
--- /dev/null
+++ b/grapher/GraphStyle.hxx
@@ -0,0 +1,43 @@
+#ifndef SYSTEMTAP_GRAPHSTYLE_HXX
+#define SYSTEMTAP_GRAPHSTYLE_HXX 1
+#include <tr1/memory>
+
+#include <cairomm/context.h>
+
+namespace systemtap
+{
+  class GraphDataBase;
+  class Graph;
+
+  class GraphStyle
+  {
+  public:
+    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr) = 0;
+  };
+
+  class GraphStyleBar : public GraphStyle
+  {
+  public:
+    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    static GraphStyleBar instance;
+  };
+
+  class GraphStyleDot : public GraphStyle
+  {
+  public:
+    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    static GraphStyleDot instance;
+  };
+
+  class GraphStyleEvent : public GraphStyle
+  {
+  public:
+    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    static GraphStyleEvent instance;
+  };  
+}
+#endif