From deb08d4b148c2f3cb8aa128e523aa5b5d77686f4 Mon Sep 17 00:00:00 2001
From: Jonathan Moore Liles <j.liles@unix.net>
Date: Wed, 13 Jun 2012 21:02:25 -0700
Subject: [PATCH] Timeline: Fix disappearing waveforms.

---
 timeline/src/Audio_Region.C | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/timeline/src/Audio_Region.C b/timeline/src/Audio_Region.C
index 4f15728..7b9ed85 100644
--- a/timeline/src/Audio_Region.C
+++ b/timeline/src/Audio_Region.C
@@ -519,7 +519,13 @@ Audio_Region::draw ( void )
     /* calculate waveform offset due to scrolling */
     /* offset is the number of frames into the waveform the value of X translates to */
     nframes_t x_frame = timeline->xoffset + timeline->x_to_ts( X - _sequence->x() );
-    nframes_t offset = x_frame - start();
+    nframes_t offset = 0;
+
+    if ( x_frame < start() )
+        /* sometimes X is one pixel too soon... */
+        offset = 0;
+    else
+        offset = x_frame - start();
 
     nframes_t fo = 0;                                           
     nframes_t ostart = 0, oend = 0;