Stop bundles disappearing from the port matrix when they

have no channels (#4209).  Also fix the remove all
channels menu option.


git-svn-id: svn://localhost/ardour2/branches/3.0@9986 d708f5d6-7413-0410-9779-e7cbd77b26cf

10 files changed, 99 insertions, 76 deletions

diff --git a/gtk2_ardour/global_port_matrix.cc b/gtk2_ardour/global_port_matrix.cc
index df22424520..565def896e 100644
--- a/gtk2_ardour/global_port_matrix.cc
+++ b/gtk2_ardour/global_port_matrix.cc
@@ -90,6 +90,10 @@ GlobalPortMatrix::get_state (BundleChannel c[2]) const
 		return PortMatrixNode::NOT_ASSOCIATED;
 	}
 
+	if (c[0].bundle->nchannels() == ChanCount::ZERO || c[1].bundle->nchannels() == ChanCount::ZERO) {
+		return PortMatrixNode::NOT_ASSOCIATED;
+	}
+
 	Bundle::PortList const & in_ports = c[IN].bundle->channel_ports (c[IN].channel);
 	Bundle::PortList const & out_ports = c[OUT].bundle->channel_ports (c[OUT].channel);
 	if (in_ports.empty() || out_ports.empty()) {
diff --git a/gtk2_ardour/port_group.cc b/gtk2_ardour/port_group.cc
index d164c17782..7523e8beea 100644
--- a/gtk2_ardour/port_group.cc
+++ b/gtk2_ardour/port_group.cc
@@ -389,12 +389,10 @@ PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inp
 
 		for (list<boost::shared_ptr<IO> >::iterator j = i->ios.begin(); j != i->ios.end(); ++j) {
 			boost::shared_ptr<Bundle> b = bundle_for_type ((*j)->bundle(), type);
-			if (b->nchannels() != ChanCount::ZERO) {
-				if (tv) {
-					g->add_bundle (b, *j, tv->color ());
-				} else {
-					g->add_bundle (b, *j);
-				}
+			if (tv) {
+				g->add_bundle (b, *j, tv->color ());
+			} else {
+				g->add_bundle (b, *j);
 			}
 		}
 	}
@@ -408,18 +406,14 @@ PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inp
 	for (BundleList::iterator i = b->begin(); i != b->end(); ++i) {
 		if (boost::dynamic_pointer_cast<UserBundle> (*i) && (*i)->ports_are_inputs() == inputs) {
 			boost::shared_ptr<Bundle> b = bundle_for_type (*i, type);
-			if (b->nchannels() != ChanCount::ZERO) {
-				system->add_bundle (b, allow_dups);
-			}
+			system->add_bundle (b, allow_dups);
 		}
 	}
 
 	for (BundleList::iterator i = b->begin(); i != b->end(); ++i) {
 		if (boost::dynamic_pointer_cast<UserBundle> (*i) == 0 && (*i)->ports_are_inputs() == inputs) {
 			boost::shared_ptr<Bundle> b = bundle_for_type (*i, type);
-			if (b->nchannels() != ChanCount::ZERO) {
-				system->add_bundle (b, allow_dups);
-			}
+			system->add_bundle (b, allow_dups);
 		}
 	}
 
@@ -427,14 +421,10 @@ PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inp
 
 	if (!inputs) {
 		boost::shared_ptr<Bundle> b = bundle_for_type (session->the_auditioner()->output()->bundle(), type);
-		if (b->nchannels() != ChanCount::ZERO) {
-			ardour->add_bundle (b);
-		}
+		ardour->add_bundle (b);
 
 		b = bundle_for_type (session->click_io()->bundle(), type);
-		if (b->nchannels() != ChanCount::ZERO) {
-			ardour->add_bundle (b);
-		}
+		ardour->add_bundle (b);
 	}
 
 	/* Ardour's surfaces */
@@ -570,9 +560,7 @@ PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inp
 		if (!extra_system[*i].empty()) {
 			boost::shared_ptr<Bundle> b = make_bundle_from_ports (extra_system[*i], *i, inputs);
 			boost::shared_ptr<Bundle> bt = bundle_for_type (b, type);
-			if (bt->nchannels() != ChanCount::ZERO) {
-				system->add_bundle (bt);
-			}
+			system->add_bundle (bt);
 		}
 	}
 
@@ -580,9 +568,7 @@ PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inp
 		if (!extra_other[*i].empty()) {
 			boost::shared_ptr<Bundle> b = make_bundle_from_ports (extra_other[*i], *i, inputs);
 			boost::shared_ptr<Bundle> bt = bundle_for_type (b, type);
-			if (bt->nchannels() != ChanCount::ZERO) {
-				other->add_bundle (bt);
-			}
+			other->add_bundle (bt);
 		}
 	}
 
@@ -789,12 +775,7 @@ PortGroupList::io_from_bundle (boost::shared_ptr<ARDOUR::Bundle> b) const
 bool
 PortGroupList::empty () const
 {
-	List::const_iterator i = _groups.begin ();
-	while (i != _groups.end() && (*i)->total_channels() == ChanCount::ZERO) {
-		++i;
-	}
-
-	return (i == _groups.end());
+	return _groups.empty ();
 }
 
 /** Take a bundle, and either return it, if it contains only ports of type \a t,
diff --git a/gtk2_ardour/port_matrix.cc b/gtk2_ardour/port_matrix.cc
index d537dd18a1..35cfea651f 100644
--- a/gtk2_ardour/port_matrix.cc
+++ b/gtk2_ardour/port_matrix.cc
@@ -289,8 +289,8 @@ void
 PortMatrix::select_arrangement ()
 {
 	uint32_t const N[2] = {
-		count_of_our_type (_ports[0].total_channels()),
-		count_of_our_type (_ports[1].total_channels())
+		count_of_our_type_min_1 (_ports[0].total_channels()),
+		count_of_our_type_min_1 (_ports[1].total_channels())
 	};
 
 	/* XXX: shirley there's an easier way than this */
@@ -407,14 +407,11 @@ PortMatrix::popup_menu (BundleChannel column, BundleChannel row, uint32_t t)
 
 			boost::weak_ptr<Bundle> w (bc[dim].bundle);
 
-			bool can_add_or_rename = false;
-
 			/* Start off with options for the `natural' port type */
 			for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
 				if (should_show (*i)) {
 					snprintf (buf, sizeof (buf), _("Add %s %s"), (*i).to_i18n_string(), channel_noun().c_str());
 					sub.push_back (MenuElem (buf, sigc::bind (sigc::mem_fun (*this, &PortMatrix::add_channel_proxy), w, *i)));
-					can_add_or_rename = true;
 				}
 			}
 
@@ -423,7 +420,6 @@ PortMatrix::popup_menu (BundleChannel column, BundleChannel row, uint32_t t)
 				if (!should_show (*i)) {
 					snprintf (buf, sizeof (buf), _("Add %s %s"), (*i).to_i18n_string(), channel_noun().c_str());
 					sub.push_back (MenuElem (buf, sigc::bind (sigc::mem_fun (*this, &PortMatrix::add_channel_proxy), w, *i)));
-					can_add_or_rename = true;
 				}
 			}
 
@@ -438,17 +434,12 @@ PortMatrix::popup_menu (BundleChannel column, BundleChannel row, uint32_t t)
 						sigc::bind (sigc::mem_fun (*this, &PortMatrix::rename_channel_proxy), w, bc[dim].channel)
 						)
 					);
-				can_add_or_rename = true;
-			}
-
-			if (can_add_or_rename) {
-				sub.push_back (SeparatorElem ());
 			}
 
 			if (can_remove_channels (bc[dim].bundle)) {
 				if (bc[dim].channel != -1) {
 					add_remove_option (sub, w, bc[dim].channel);
-				} else {
+				} else if (bc[dim].bundle->nchannels() != ARDOUR::ChanCount::ZERO) {
 
 					snprintf (buf, sizeof (buf), _("Remove all"));
 					sub.push_back (
@@ -465,7 +456,8 @@ PortMatrix::popup_menu (BundleChannel column, BundleChannel row, uint32_t t)
 				}
 			}
 
-			if (_show_only_bundles || count_of_our_type (bc[dim].bundle->nchannels()) <= 1) {
+			uint32_t c = count_of_our_type (bc[dim].bundle->nchannels ());
+			if ((_show_only_bundles && c > 0) || c == 1) {
 				snprintf (buf, sizeof (buf), _("%s all"), disassociation_verb().c_str());
 				sub.push_back (
 					MenuElem (buf, sigc::bind (sigc::mem_fun (*this, &PortMatrix::disassociate_all_on_channel), w, bc[dim].channel, dim))
@@ -475,7 +467,7 @@ PortMatrix::popup_menu (BundleChannel column, BundleChannel row, uint32_t t)
 
 				if (bc[dim].channel != -1) {
 					add_disassociate_option (sub, w, dim, bc[dim].channel);
-				} else {
+				} else if (count_of_our_type (bc[dim].bundle->nchannels()) != 0) {
 					snprintf (buf, sizeof (buf), _("%s all"), disassociation_verb().c_str());
 					sub.push_back (
 						MenuElem (buf, sigc::bind (sigc::mem_fun (*this, &PortMatrix::disassociate_all_on_bundle), w, dim))
@@ -722,7 +714,10 @@ PortMatrix::remove_all_channels (boost::weak_ptr<Bundle> w)
 		return;
 	}
 
-	for (uint32_t i = 0; i < b->nchannels().n_total(); ++i) {
+	/* Remove channels backwards so that we don't renumber channels
+	   that we are about to remove.
+	*/
+	for (int i = (b->nchannels().n_total() - 1); i >= 0; --i) {
 		if (should_show (b->channel_type(i))) {
 			remove_channel (ARDOUR::BundleChannel (b, i));
 		}
@@ -856,7 +851,9 @@ PortMatrix::body_dimensions_changed ()
 	resize_window_to_proportion_of_monitor (_parent, m.first, m.second);
 }
 
-
+/** @return The PortGroup that is currently visible (ie selected by
+ *  the notebook) along a given axis.
+ */
 boost::shared_ptr<const PortGroup>
 PortMatrix::visible_ports (int d) const
 {
@@ -942,6 +939,20 @@ PortMatrix::count_of_our_type (ChanCount c) const
 	return c.get (_type);
 }
 
+/** @return The number of ports of our type in the given channel count,
+ *  but returning 1 if there are no ports.
+ */
+uint32_t
+PortMatrix::count_of_our_type_min_1 (ChanCount c) const
+{
+	uint32_t n = count_of_our_type (c);
+	if (n == 0) {
+		n = 1;
+	}
+
+	return n;
+}
+
 PortMatrixNode::State
 PortMatrix::get_association (PortMatrixNode node) const
 {
@@ -1007,3 +1018,9 @@ PortMatrix::get_association (PortMatrixNode node) const
 	return PortMatrixNode::NOT_ASSOCIATED;
 }
 
+/** @return true if b is a non-zero pointer and the bundle it points to has some channels */
+bool
+PortMatrix::bundle_with_channels (boost::shared_ptr<ARDOUR::Bundle> b)
+{
+	return b && b->nchannels() != ARDOUR::ChanCount::ZERO;
+}
diff --git a/gtk2_ardour/port_matrix.h b/gtk2_ardour/port_matrix.h
index 01fb67c0ae..75b2abf279 100644
--- a/gtk2_ardour/port_matrix.h
+++ b/gtk2_ardour/port_matrix.h
@@ -126,6 +126,7 @@ public:
 
 	bool should_show (ARDOUR::DataType) const;
 	uint32_t count_of_our_type (ARDOUR::ChanCount) const;
+	uint32_t count_of_our_type_min_1 (ARDOUR::ChanCount) const;
 
 	PortMatrixNode::State get_association (PortMatrixNode) const;
 
@@ -159,6 +160,8 @@ public:
 
 	sigc::signal<void, Result> Finished;
 
+	static bool bundle_with_channels (boost::shared_ptr<ARDOUR::Bundle>);
+
 protected:
 
 	/** We have two port group lists.  One will be presented on the rows of the matrix,
diff --git a/gtk2_ardour/port_matrix_body.cc b/gtk2_ardour/port_matrix_body.cc
index 2b12ed092a..5d7bb0c4b6 100644
--- a/gtk2_ardour/port_matrix_body.cc
+++ b/gtk2_ardour/port_matrix_body.cc
@@ -458,7 +458,7 @@ PortMatrixBody::highlight_associated_channels (int dim, ARDOUR::BundleChannel h)
 	ARDOUR::BundleChannel bc[2];
 	bc[dim] = h;
 
-	if (!bc[dim].bundle) {
+	if (!PortMatrix::bundle_with_channels (bc[dim].bundle)) {
 		return;
 	}
 
diff --git a/gtk2_ardour/port_matrix_column_labels.cc b/gtk2_ardour/port_matrix_column_labels.cc
index f9b5b6aef8..eba2fffddf 100644
--- a/gtk2_ardour/port_matrix_column_labels.cc
+++ b/gtk2_ardour/port_matrix_column_labels.cc
@@ -149,7 +149,7 @@ PortMatrixColumnLabels::render (cairo_t* cr)
 		if (_matrix->show_only_bundles()) {
 			x += grid_spacing();
 		} else {
-			x += _matrix->count_of_our_type ((*i)->bundle->nchannels()) * grid_spacing();
+			x += _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels()) * grid_spacing();
 		}
 
 		++N;
@@ -214,7 +214,7 @@ PortMatrixColumnLabels::mouseover_changed (list<PortMatrixNode> const &)
 		ARDOUR::BundleChannel c = i->column;
 		ARDOUR::BundleChannel r = i->row;
 
-		if (c.bundle && r.bundle) {
+		if (PortMatrix::bundle_with_channels (c.bundle) && PortMatrix::bundle_with_channels (r.bundle)) {
 			add_channel_highlight (c);
 		} else if (c.bundle) {
 			_body->highlight_associated_channels (_matrix->column_index(), c);
@@ -273,7 +273,7 @@ PortMatrixColumnLabels::render_bundle_name (
 	if (_matrix->show_only_bundles()) {
 		w = grid_spacing ();
 	} else {
-		w = _matrix->count_of_our_type (b->nchannels()) * grid_spacing();
+		w = _matrix->count_of_our_type_min_1 (b->nchannels()) * grid_spacing();
 	}
 
 	double x_ = xoff;
diff --git a/gtk2_ardour/port_matrix_component.cc b/gtk2_ardour/port_matrix_component.cc
index 38a07479b0..166488bef0 100644
--- a/gtk2_ardour/port_matrix_component.cc
+++ b/gtk2_ardour/port_matrix_component.cc
@@ -132,7 +132,7 @@ PortMatrixComponent::group_size (boost::shared_ptr<const PortGroup> g) const
 		s = bundles.size();
 	} else {
 		for (PortGroup::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
-			s += _matrix->count_of_our_type ((*i)->bundle->nchannels());
+			s += _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels());
 		}
 	}
 
@@ -169,7 +169,7 @@ PortMatrixComponent::channel_to_position (ARDOUR::BundleChannel bc, boost::share
 		if (_matrix->show_only_bundles()) {
 			p += 1;
 		} else {
-			p += _matrix->count_of_our_type ((*i)->bundle->nchannels());
+			p += _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels());
 		}
 	}
 
@@ -195,7 +195,7 @@ PortMatrixComponent::position_to_channel (double p, double, boost::shared_ptr<co
 
 		} else {
 
-			uint32_t const s = _matrix->count_of_our_type ((*j)->bundle->nchannels());
+			uint32_t const s = _matrix->count_of_our_type_min_1 ((*j)->bundle->nchannels());
 			if (p < s) {
 				return ARDOUR::BundleChannel ((*j)->bundle, p);
 			} else {
diff --git a/gtk2_ardour/port_matrix_component.h b/gtk2_ardour/port_matrix_component.h
index 3fdd26394a..a574d20341 100644
--- a/gtk2_ardour/port_matrix_component.h
+++ b/gtk2_ardour/port_matrix_component.h
@@ -31,6 +31,7 @@ class PortGroup;
 class PortGroupList;
 
 namespace ARDOUR {
+	class Bundle;
 	class BundleChannel;
 }
 
diff --git a/gtk2_ardour/port_matrix_grid.cc b/gtk2_ardour/port_matrix_grid.cc
index 4a2f569d5c..b87f560984 100644
--- a/gtk2_ardour/port_matrix_grid.cc
+++ b/gtk2_ardour/port_matrix_grid.cc
@@ -81,7 +81,7 @@ PortMatrixGrid::render (cairo_t* cr)
 
 		if (!_matrix->show_only_bundles()) {
 			cairo_set_line_width (cr, thin_grid_line_width());
-			for (uint32_t j = 0; j < _matrix->count_of_our_type ((*i)->bundle->nchannels()); ++j) {
+			for (uint32_t j = 0; j < _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels()); ++j) {
 				x += grid_spacing ();
 				cairo_move_to (cr, x, 0);
 				cairo_line_to (cr, x, _height);
@@ -97,6 +97,12 @@ PortMatrixGrid::render (cairo_t* cr)
 		++N;
 	}
 
+	if (_matrix->show_only_bundles ()) {
+		cairo_move_to (cr, x, 0);
+		cairo_line_to (cr, x, _height);
+		cairo_stroke (cr);
+	}
+
 	uint32_t y = 0;
 
 	/* HORIZONTAL GRID LINES */
@@ -111,7 +117,7 @@ PortMatrixGrid::render (cairo_t* cr)
 
 		if (!_matrix->show_only_bundles()) {
 			cairo_set_line_width (cr, thin_grid_line_width());
-			for (uint32_t j = 0; j < _matrix->count_of_our_type ((*i)->bundle->nchannels()); ++j) {
+			for (uint32_t j = 0; j < _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels()); ++j) {
 				y += grid_spacing ();
 				cairo_move_to (cr, 0, y);
 				cairo_line_to (cr, _width, y);
@@ -127,6 +133,12 @@ PortMatrixGrid::render (cairo_t* cr)
 		++N;
 	}
 
+	if (_matrix->show_only_bundles ()) {
+		cairo_move_to (cr, 0, y);
+		cairo_line_to (cr, _width, y);
+		cairo_stroke (cr);
+	}
+	
 	/* ASSOCIATION INDICATORS and NON-CONNECTABLE INDICATORS */
 
 	/* we draw a grey square in a matrix box if the two ports that intersect at that box
@@ -173,14 +185,10 @@ PortMatrixGrid::render (cairo_t* cr)
 			for (PortGroup::BundleList::const_iterator j = row_bundles.begin(); j != row_bundles.end(); ++j) {
 
 				x = bx;
-				for (uint32_t k = 0; k < (*i)->bundle->nchannels().n_total(); ++k) {
+				for (uint32_t k = 0; k < _matrix->count_of_our_type ((*i)->bundle->nchannels()); ++k) {
 
 					y = by;
-					for (uint32_t l = 0; l < (*j)->bundle->nchannels().n_total(); ++l) {
-
-						if (!_matrix->should_show ((*i)->bundle->channel_type(k)) || !_matrix->should_show ((*j)->bundle->channel_type(l))) {
-							continue;
-						}
+					for (uint32_t l = 0; l < _matrix->count_of_our_type ((*j)->bundle->nchannels()); ++l) {
 
 						ARDOUR::BundleChannel c[2];
 						c[_matrix->column_index()] = ARDOUR::BundleChannel ((*i)->bundle, k);
@@ -209,13 +217,21 @@ PortMatrixGrid::render (cairo_t* cr)
 						y += grid_spacing();
 					}
 
+					if ((*j)->bundle->nchannels() == ARDOUR::ChanCount::ZERO) {
+						draw_non_connectable_indicator (cr, x, y);
+					}
+					
 					x += grid_spacing();
 				}
 
-				by += _matrix->count_of_our_type ((*j)->bundle->nchannels()) * grid_spacing();
+				if ((*i)->bundle->nchannels() == ARDOUR::ChanCount::ZERO) {
+					draw_non_connectable_indicator (cr, x, y);
+				}
+
+				by += _matrix->count_of_our_type_min_1 ((*j)->bundle->nchannels()) * grid_spacing();
 			}
 
-			bx += _matrix->count_of_our_type ((*i)->bundle->nchannels()) * grid_spacing();
+			bx += _matrix->count_of_our_type_min_1 ((*i)->bundle->nchannels()) * grid_spacing();
 		}
 	}
 }
@@ -402,7 +418,7 @@ PortMatrixGrid::draw_extra (cairo_t* cr)
 		double const x = component_to_parent_x (channel_to_position (i->column, _matrix->visible_columns()) * grid_spacing()) + grid_spacing() / 2;
 		double const y = component_to_parent_y (channel_to_position (i->row, _matrix->visible_rows()) * grid_spacing()) + grid_spacing() / 2;
 
-		if (i->row.bundle && i->column.bundle) {
+		if (PortMatrix::bundle_with_channels (i->row.bundle) && PortMatrix::bundle_with_channels (i->column.bundle)) {
 
 			cairo_move_to (cr, x, y);
 			if (_matrix->arrangement() == PortMatrix::LEFT_TO_BOTTOM) {
diff --git a/gtk2_ardour/port_matrix_row_labels.cc b/gtk2_ardour/port_matrix_row_labels.cc
index bc6e2a2fa1..8c8dcd4dff 100644
--- a/gtk2_ardour/port_matrix_row_labels.cc
+++ b/gtk2_ardour/port_matrix_row_labels.cc
@@ -115,17 +115,18 @@ PortMatrixRowLabels::render (cairo_t* cr)
 		render_bundle_name (cr, background_colour (), (*i)->has_colour ? (*i)->colour : get_a_bundle_colour (N), 0, y, (*i)->bundle);
 
 		if (!_matrix->show_only_bundles()) {
-			for (uint32_t j = 0; j < (*i)->bundle->nchannels().n_total(); ++j) {
-
-				if (!_matrix->should_show ((*i)->bundle->channel_type(j))) {
-					continue;
-				}
-
+			uint32_t const N = _matrix->count_of_our_type ((*i)->bundle->nchannels());
+			for (uint32_t j = 0; j < N; ++j) {
 				Gdk::Color c = (*i)->has_colour ? (*i)->colour : get_a_bundle_colour (M);
 				render_channel_name (cr, background_colour (), c, 0, y, ARDOUR::BundleChannel ((*i)->bundle, j));
 				y += grid_spacing();
 				++M;
 			}
+
+			if (N == 0) {
+				y += grid_spacing ();
+			}
+			
 		} else {
 			y += grid_spacing();
 		}
@@ -215,7 +216,7 @@ PortMatrixRowLabels::render_bundle_name (
 {
 	double const x = bundle_name_x ();
 
-	int const n = _matrix->show_only_bundles() ? 1 : _matrix->count_of_our_type (b->nchannels());
+	int const n = _matrix->show_only_bundles() ? 1 : _matrix->count_of_our_type_min_1 (b->nchannels());
 	set_source_rgb (cr, bg_colour);
 	cairo_rectangle (cr, xoff + x, yoff, _longest_bundle_name + name_pad() * 2, grid_spacing() * n);
 	cairo_fill_preserve (cr);
@@ -244,15 +245,15 @@ PortMatrixRowLabels::render_channel_name (
 	cairo_set_line_width (cr, label_border_width ());
 	cairo_stroke (cr);
 
-	cairo_text_extents_t ext;
-	cairo_text_extents (cr, bc.bundle->channel_name(bc.channel).c_str(), &ext);
-	double const off = (grid_spacing() - ext.height) / 2;
-
 	if (_matrix->count_of_our_type (bc.bundle->nchannels()) > 1) {
 
 		/* only plot the name if the bundle has more than one channel;
 		   the name of a single channel is assumed to be redundant */
 
+		cairo_text_extents_t ext;
+		cairo_text_extents (cr, bc.bundle->channel_name(bc.channel).c_str(), &ext);
+		double const off = (grid_spacing() - ext.height) / 2;
+
 		set_source_rgb (cr, text_colour());
 		cairo_move_to (cr, port_name_x() + xoff + name_pad(), yoff + name_pad() + off);
 		cairo_show_text (cr, bc.bundle->channel_name(bc.channel).c_str());
@@ -304,7 +305,7 @@ PortMatrixRowLabels::mouseover_changed (list<PortMatrixNode> const &)
 		ARDOUR::BundleChannel c = i->column;
 		ARDOUR::BundleChannel r = i->row;
 
-		if (c.bundle && r.bundle) {
+		if (PortMatrix::bundle_with_channels (c.bundle) && PortMatrix::bundle_with_channels (r.bundle)) {
 			add_channel_highlight (r);
 		} else if (r.bundle) {
 			_body->highlight_associated_channels (_matrix->row_index(), r);