From 03ebf81c360e429ef1e4f8bae48fe524f712589a Mon Sep 17 00:00:00 2001
From: Tim Moore <timoore@redhat.com>
Date: Thu, 3 Dec 2009 19:31:08 +0100
Subject: Hover text for event-style graphs

Don't draw the data value for an event; only display it in hover text.

* grapher/Graph.hxx (window2GraphCoords): new function
* grapher/Graph.cxx (window2GraphCoords): ditto
* grapher/GraphStyle.cxx (GraphStyleEvent::dataIndexAtPoint): new
  function implementation.
---
 grapher/Graph.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'grapher/Graph.cxx')

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;
+  }
 }
-- 
cgit