1 files changed, 7 insertions, 0 deletions
diff --git a/grapher/Graph.cxx b/grapher/Graph.cxx
index 55ffcdf2..57f1dc9a 100644
--- a/grapher/Graph.cxx
+++ b/grapher/Graph.cxx
@@ -205,4 +205,11 @@ namespace systemtap
     return (_left
             + (_right - _left) * ((x - _xOffset)/(_zoomFactor * _graphWidth)));
   }
+
+  void Graph::window2GraphCoords(double x, double y,
+                                 double& xgraph, double& ygraph)
+  {
+    xgraph = x -_xOffset;
+    ygraph = -y + _yOffset + _graphHeight;
+  }
 }