Draw multiple graphs

* grapher/Graph.cxx (Graph constructor): Initialize graph dimensions.
(draw): Don't clear the drawing area.
* grapher/GraphWidget.hxx (GraphWidget): Add dimensions and
on_size_request() method.
* grapher/GraphWidget.cxx (GraphWidget constructor): Initialize
dimensions.
(addGraph): New method.
(on_size_request): New method to pass widget's size to parent widgets
* grapher/grapher.cxx (GrapherWindow constructor): add "add graph"
action.
(addGraph): New method.

1 files changed, 2 insertions, 5 deletions

diff --git a/grapher/Graph.cxx b/grapher/Graph.cxx
index e1ea01f6..7f9b2607 100644
--- a/grapher/Graph.cxx
+++ b/grapher/Graph.cxx
@@ -10,7 +10,8 @@ namespace systemtap
   using namespace std::tr1;
   
   Graph::Graph(double x, double y)
-    : _graphX(0), _graphY(0),
+    : _width(600), _height(200), _graphX(0), _graphY(0),
+      _graphWidth(580), _graphHeight(180),
       _lineWidth(2), _autoScaling(true), _autoScrolling(true),
       _zoomFactor(1.0), _playButton(new CairoPlayButton),
       _left(0.0), _right(1.0), _top(5.0), _bottom(0.0)
@@ -78,10 +79,6 @@ namespace systemtap
     double horizScale = _zoomFactor * _graphWidth / ( _right - _left);
     cr->translate(20.0, 0.0);
     cr->set_line_width(_lineWidth);
-    cr->save();
-    cr->set_source_rgba(0.0, 0.0, 0.0, 1.0);
-    cr->paint();
-    cr->restore();
 
     for (DatasetList::iterator itr = _datasets.begin(), e = _datasets.end();
          itr != e;