From bbda37c28fde645f856fde01ec6fbc0a9fea3c84 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 16 Mar 2017 03:47:46 +0100
Subject: [PATCH] Fix note-grid, canvas bounding-box offset.

Note lines on a MIDI-track were able to exceed the time-axis' height
towards the top. If a MIDI track was at the top, the TAV's canvas-group
would increase the overall bounding-box of the track-area and allow
tracks to visually bleed into the time markers group.
---
 gtk2_ardour/midi_streamview.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gtk2_ardour/midi_streamview.cc b/gtk2_ardour/midi_streamview.cc
index 23d31932d8..fe121a4770 100644
--- a/gtk2_ardour/midi_streamview.cc
+++ b/gtk2_ardour/midi_streamview.cc
@@ -358,7 +358,7 @@ MidiStreamView::draw_note_lines()
 		double h = y - prev_y;
 		double mid = y + (h/2.0);
 
-		if (height > 1.0) { // XXX ? should that not be h >= 1 ?
+		if (mid >= 0 && h > 1.0) {
 			_note_lines->add (mid, h, color);
 		}