From 10e1807fba8e9c4aa543b8caced2fdf506990723 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <carl@carlh.net>
Date: Wed, 7 Sep 2011 11:56:29 +0000
Subject: [PATCH] Disallow black as a route group colour; force a dark grey
 instead (part of #4064).

git-svn-id: svn://localhost/ardour2/branches/3.0@10061 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/group_tabs.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gtk2_ardour/group_tabs.cc b/gtk2_ardour/group_tabs.cc
index 59c1b40e35..e2f8e9905a 100644
--- a/gtk2_ardour/group_tabs.cc
+++ b/gtk2_ardour/group_tabs.cc
@@ -525,6 +525,11 @@ void
 GroupTabs::set_group_color (RouteGroup* group, Gdk::Color color)
 {
 	assert (group);
+
+	/* Hack to disallow black route groups; force a dark grey instead */
+	if (color.get_red() == 0 && color.get_green() == 0 && color.get_blue() == 0) {
+		color.set_grey_p (0.1);
+	}
 	
 	GUIObjectState& gui_state = *ARDOUR_UI::instance()->gui_object_state;