Support for presenting multiple graphs

* grapher/Graph.hxx: New file; class for single graph display.
* grapher/Graph.cxx: New file.
* grapher/GraphData.hxx: Associate title and axis labels with graph
data and not a graph display.
* grapher/GraphWidget.hxx: Move graph-related members to Graph class.
* grapher/GraphWidget.cxx (getExtents, setExtents): Move to Graph
class
(on_expose_event): Move graph rendering to Graph.
(on_button_press_event): Delegate to Graph.
(on_motion_notify_event, on_scroll_event): Modify "active" graph.
* grapher/StapParser.cxx (findTaggedValue): New parsing helper
function.
(io_callback): Support new syntax where properties are attached to
graph data and not the entire graph.
* grapher/grapher.cxx (GrapherWindow): Don't set graph values.
* grapher/Makefile.am: Add Graph.cxx.
* testsuite/systemtap.examples/general/grapher.stp: New property syntax.

1 files changed, 48 insertions, 0 deletions

diff --git a/grapher/Graph.hxx b/grapher/Graph.hxx
new file mode 100644
index 00000000..1cc1892d
--- /dev/null
+++ b/grapher/Graph.hxx
@@ -0,0 +1,48 @@
+#ifndef SYSTEMTAP_GRAPH_HXX
+#define SYSTEMTAP_GRAPH_HXX 1
+
+#include <cairomm/context.h>
+
+#include "GraphData.hxx"
+#include "CairoWidget.hxx"
+
+namespace systemtap
+{
+  class Graph : public CairoWidget
+  {
+  public:
+    friend class GraphWidget;
+    Graph();
+    virtual void draw(Cairo::RefPtr<Cairo::Context> cr);
+    virtual bool containsPoint(double x, double y);
+    double getLineWidth() { return _lineWidth; }
+    void setLineWidth(double lineWidth) { _lineWidth = lineWidth; }
+    bool getAutoScaling() const { return _autoScaling; }
+    void setAutoScaling(bool val) { _autoScaling = val; }
+    void addGraphData(std::tr1::shared_ptr<GraphDataBase> data);
+    void getExtents(double& left, double& right, double& top, double& bottom)
+        const;
+    void setExtents(double left, double right, double top, double bottom);
+    // extents of the whole graph area
+    double _width;
+    double _height;
+    // Position, extents of the graph
+    double _graphX;
+    double _graphY;
+    double _graphWidth;
+    double _graphHeight;
+    double _lineWidth;
+    bool _autoScaling;
+    bool _autoScrolling;
+    double _zoomFactor;
+    std::tr1::shared_ptr<CairoPlayButton> _playButton;
+  protected:
+        typedef std::vector<std::tr1::shared_ptr<GraphDataBase> > DatasetList;
+    DatasetList _datasets;
+    double _left;
+    double _right;
+    double _top;
+    double _bottom;
+  };
+}
+#endif