From c10fce7d6aaa57a4f94f9d7aeea906597456f7ce Mon Sep 17 00:00:00 2001
From: Tim Moore <timoore@redhat.com>
Date: Wed, 2 Dec 2009 19:27:07 +0100
Subject: Make the hover text conform to data displayed.

Start of code to be more selective about the association between the
hover text and the underling graph. Also, show the data set name in hover text.

* grapher/GraphStyle.hxx (dataIndexAtPoint): New virtual function.
* grapher/GraphStyle.cxx (dataIndexAtPoint): Implementation for bar graphs
* grapher/GraphWidget.cxx (onHoverTimeout): Use dataIndexAtPoint.
---
 grapher/GraphStyle.hxx | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

(limited to 'grapher/GraphStyle.hxx')

diff --git a/grapher/GraphStyle.hxx b/grapher/GraphStyle.hxx
index 4a0cd955..9625f451 100644
--- a/grapher/GraphStyle.hxx
+++ b/grapher/GraphStyle.hxx
@@ -14,29 +14,40 @@ namespace systemtap
   public:
     virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
                       Graph* graph, Cairo::RefPtr<Cairo::Context> cr) = 0;
+    virtual ssize_t dataIndexAtPoint(double x, double y,
+                                     std::tr1::shared_ptr<GraphDataBase>
+                                     graphData,
+                                     std::tr1::shared_ptr<Graph> graph)
+    {
+      return -1;
+    }
   };
 
   class GraphStyleBar : public GraphStyle
   {
   public:
-    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
-                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+              Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    
     static GraphStyleBar instance;
+    ssize_t dataIndexAtPoint(double x, double y,
+                             std::tr1::shared_ptr<GraphDataBase> graphData,
+                             std::tr1::shared_ptr<Graph> graph);
   };
 
   class GraphStyleDot : public GraphStyle
   {
   public:
-    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
-                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+              Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
     static GraphStyleDot instance;
   };
 
   class GraphStyleEvent : public GraphStyle
   {
   public:
-    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
-                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
+    void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
+              Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
     static GraphStyleEvent instance;
   };  
 }
-- 
cgit