From cf90cfa4c10ee58ec65da833f5969b3f5f9c931e Mon Sep 17 00:00:00 2001
From: John Anderson <ardour@semiosix.com>
Date: Fri, 20 Jul 2007 14:19:29 +0000
Subject: make control_scroll handle wheel events properly

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@2160 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/editor.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'gtk2_ardour/editor.h')

diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index f15513142e..ba2815217b 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -26,6 +26,8 @@
 #include <string>
 #include <sys/time.h>
 
+#include <boost/optional.hpp>
+
 #include <libgnomecanvasmm/canvas.h>
 #include <libgnomecanvasmm/group.h>
 #include <libgnomecanvasmm/line.h>
@@ -349,6 +351,9 @@ class Editor : public PublicEditor
 	
 	ARDOUR::Session     *session;
 	bool                 constructed;
+  
+	// to keep track of the playhead position for control_scroll
+	boost::optional<nframes_t> _control_scroll_target;
 
 	PlaylistSelector* _playlist_selector;
 
-- 
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