From d293d53136fa7e6e7eda510847145edf4d3d7f55 Mon Sep 17 00:00:00 2001
From: Tim Moore <timoore@redhat.com>
Date: Tue, 1 Dec 2009 12:26:59 +0100
Subject: Add hover text to the graph.

When the graph display is paused, leaving the mouse stationary over
the graph will display the data point under the pointer.

* grapher/CairoWidget.hxx (CairoTextBox): new class
  (CairoWidget, CairoPlayButton): refector some play button-specific
  things from CairoWidget to CairoPlayButton.
* grapher/CairoWidget.cxx (CairoTextBox::draw): new function.
* grapher/GraphWidget.hxx (GraphWidget): new members for supporting
  hover text.
* grapher/GraphWidget.cxx (on_motion_notify_event): Set up hover text box.
  (establishHoverTimeout, onHoverTimeout, getGraphUnderPoint): new functions.
---
 grapher/GraphWidget.hxx | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'grapher/GraphWidget.hxx')

diff --git a/grapher/GraphWidget.hxx b/grapher/GraphWidget.hxx
index 876b6e09..61d50e70 100644
--- a/grapher/GraphWidget.hxx
+++ b/grapher/GraphWidget.hxx
@@ -65,8 +65,15 @@ namespace systemtap
     void onDataAdd();
     void onDataRemove();
     void onDataDialogOpen();
+    bool onHoverTimeout();
     DataModelColumns _dataColumns;
     Glib::RefPtr<Gtk::ListStore> _listStore;
+    sigc::connection _hover_timeout_connection;
+    std::tr1::shared_ptr<CairoTextBox> _hoverText;
+    double _mouseX;
+    double _mouseY;
+    std::tr1::shared_ptr<Graph> getGraphUnderPoint(double x, double y);
+    void establishHoverTimeout();
   };
 }
 #endif // SYSTEMTAP_GRAPHWIDGET_H
-- 
cgit