From 5700d10890669e8a890288b208808f8a8467855a Mon Sep 17 00:00:00 2001
From: Carl Hetherington <carl@carlh.net>
Date: Wed, 7 Dec 2011 17:50:56 +0000
Subject: Check that adding a port to an IO is ok with the processors in its
 route, and raise an error if not (part of #4535).

git-svn-id: svn://localhost/ardour2/branches/3.0@10938 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/port_matrix.cc | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'gtk2_ardour/port_matrix.cc')

diff --git a/gtk2_ardour/port_matrix.cc b/gtk2_ardour/port_matrix.cc
index 576b8789ca..8bdc1c4cc0 100644
--- a/gtk2_ardour/port_matrix.cc
+++ b/gtk2_ardour/port_matrix.cc
@@ -26,6 +26,7 @@
 #include <gtkmm/menu_elems.h>
 #include <gtkmm/window.h>
 #include <gtkmm/stock.h>
+#include <gtkmm/messagedialog.h>
 #include "ardour/bundle.h"
 #include "ardour/types.h"
 #include "ardour/session.h"
@@ -684,7 +685,14 @@ PortMatrix::add_channel (boost::shared_ptr<Bundle> b, DataType t)
 	boost::shared_ptr<IO> io = io_from_bundle (b);
 
 	if (io) {
-		io->add_port ("", this, t);
+		int const r = io->add_port ("", this, t);
+		if (r == -1) {
+			Gtk::MessageDialog msg (_("It is not possible to add a port here, as the first processor in the track or buss cannot "
+						  "support the new configuration."
+							));
+			msg.set_title (_("Cannot add port"));
+			msg.run ();
+		}
 	}
 }
 
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