refactor list of data sets out of GraphWidget into a global data structure.

Also, add a sigc signal for broadcasting data set changes.

* grapher/GraphData.hxx (GraphDataList) new typedef
  (getGraphData, graphDataSignal): new functions
* grapher/Graph.hxx (DatasetList): remove typedef in favor of
  systemtap::GraphDataList
* grapher/GraphWidget.cxx (GraphWidget, onGraphDataChanged): Use
  graphDataSignal to notice new data sets that need to be added. Use
  the global data set list instead of one embedded in GraphWidget.
* grapher/StapParser.hxx: delete the _widget member; use signals to
  broadcast that there are new data sets instead of calling into the widget.

1 files changed, 2 insertions, 3 deletions

diff --git a/grapher/Graph.hxx b/grapher/Graph.hxx
index 4dcb5169..c928fec2 100644
--- a/grapher/Graph.hxx
+++ b/grapher/Graph.hxx
@@ -19,7 +19,6 @@ namespace systemtap
   class Graph : public CairoWidget
   {
   public:
-    typedef std::vector<std::tr1::shared_ptr<GraphDataBase> > DatasetList;
     friend class GraphWidget;
     Graph(double x = 0.0, double y = 0.0);
     virtual void draw(Cairo::RefPtr<Cairo::Context> cr);
@@ -48,11 +47,11 @@ namespace systemtap
     double _yOffset;
     std::tr1::shared_ptr<CairoPlayButton> _playButton;
     int64_t _timeBase;
-    DatasetList& getDatasets() { return _datasets; }
+    GraphDataList& getDatasets() { return _datasets; }
     int64_t getTimeAtPoint(double x);
     void window2GraphCoords(double x, double y, double& xgraph, double& ygraph);
   protected:
-    DatasetList _datasets;
+    GraphDataList _datasets;
     int64_t _left;
     int64_t _right;
     double _top;