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, 2 deletions

diff --git a/grapher/grapher.cxx b/grapher/grapher.cxx
index 567b0405..4769877f 100644
--- a/grapher/grapher.cxx
+++ b/grapher/grapher.cxx
@@ -161,7 +161,7 @@ public:
   void cleanUp();
   tr1::shared_ptr<StapParser> makeStapParser()
   {
-    tr1::shared_ptr<StapParser> result(new StapParser(_win, _widget));
+    tr1::shared_ptr<StapParser> result(new StapParser(_win));
     _parsers.push_back(ParserInstance(-1, result));
     return result;
   }
@@ -274,7 +274,7 @@ int StapLauncher::launch()
         }
       _exit(1);
     }
-  tr1::shared_ptr<StapParser> sp(new StapParser(_win, _widget));
+  tr1::shared_ptr<StapParser> sp(new StapParser(_win));
   _parsers.push_back(ParserInstance(childPid, sp));
   sp->setErrFd(pipefd[2]);
   sp->setInFd(pipefd[0]);